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Alkhuzaim, Faisal Kh. "“I Want Ketchup on my Rice”: The Role of Child Agency on Arab Migrant Families Food and Foodways." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7258.
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This exploratory research study examines changes in food and foodways (food habits) among Arab migrant families in a small community in Tampa, Florida. It also explores how those families’ children may play a role in the process of change. Within this community, I conducted my research study at a private school, where I recruited families with children between the ages of eight and seventeen. In applying the ecological model of food and nutrition and the developmental niche theoretical framework, this research draws on qualitative methods, including structured interviews with parents; focus group discussion with parents; a food survey; and children’s focus groups that included engaging activities such as vignettes (role playing), free-listing and sorting, and one-day food menus. I used MAXQDA 18 software for qualitative data analysis, and the results show that the main factors aiding in post-migration food and foodways changes are time constraints (lifestyle), ingredients, and availability and accessibility of permissible food (halal). Parent did not mention their children as a main factor; however, they perceive influence of their children. Feeding practices such as rewarding, restriction, forcing, and family meals were emerging themes, and children express their agency around those practices. Children developed their own agency regarding food because of their social and physical environments. Older children perceived their influence on their families’ food and foodways by introducing food items to their own families.
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Kenny, Tiffannie. "The Inuit Food System: Ecological, Economic, and Environmental Dimensions of the Nutrition Transition." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36157.
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From the Arctic to the South Pacific, Indigenous Peoples have experienced a rapid nutrition transition involving the decline of traditional/subsistence-based ways of life and the adoption of a “Western” diet that is high in saturated fats, sugar, and processed foods. This dietary shift has been paralleled by an increased prevalence of obesity, diabetes, and, other diet-related chronic diseases.
In the Arctic, rapidly changing biophysical conditions, globalization, and integration into market economies are collectively challenging access to both country foods and nutritious market foods. Food security and nutrient adequacy thus remain elusive for Inuit communities of northern Canada. Premised upon the view that human well-being is predicated upon complex and dynamic interactions between ecosystems, economies, and societies, this dissertation integrates multiple lines of inquiry and scales of engagement (community, regional, and national) to further understanding of the nutrition transition among Inuit in Canada. The thesis is comprised of two sections.
Section 1 bridges the often disparate fields of human nutrition and wildlife conservation by addressing key questions about the status and management of Arctic species, and the implications for Inuit food security and health. For example, caribou (Rangifer tarandus) populations across the circumpolar north are currently experiencing dramatic declines in abundance and restrictions on Inuit subsistence harvest are currently implemented for several caribou populations. Caribou, however, is the primary source of protein and several micronutrients involved in the prevention of anemia (e.g. iron zinc, copper, riboflavin, and vitamin B12) in the contemporary diet of Inuit adults. Caribou consumption is also positively associated with hemoglobin levels in Inuit adults.
Section 2 considers elements of the market food system in Inuit communities. We found that the most popular market foods consumed by Inuit (e.g. sweetened beverages, added sugar, and bread) contribute significantly to total diet energy while contributing minimally to most micronutrients. Using optimization models, we have demonstrated that a nutritious diet (one meeting Health Canada dietary reference intake values) is theoretically feasible based on a mix of country food and market food, and at relatively little additional cost from current diets. However, significant deviations in patterns of food expenditure away from sweetened beverages, towards dairy, and whole fruits and vegetables would be required.
Taken collectively, this thesis provides important information, as well as new tools, and approaches, for communities, wildlife conservation and public health professionals to jointly promote ecosystem and human health in a rapidly changing environment.
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Flamm, Laura Jayne. "Fair Food: Justice and Sustainability in Community Nutrition." Miami University Honors Theses / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=muhonors1270965544.
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Mitchell, Ellen Sullivan. "Women's experience of food cravings : a biopsychosocial model /." Thesis, Connect to this title online; UW restricted, 1986. http://hdl.handle.net/1773/7219.
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Urbina, Jezabel. "Improving Nutrition among Supplemental Nutrition Assistance Program Recipients Using a Monetary Incentive Model." ScholarWorks, 2018. https://scholarworks.waldenu.edu/dissertations/5668.
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The Supplemental Nutrition Assistance Program (SNAP) is the United States' largest government assistance program that aims to alleviate food insecurity. The SNAP program allows low-income individuals and families the ability to purchase nutritious foods through a monthly benefit. However, the current body of literature presents evidence of the program's counterproductive effect. The purpose of this study was to determine whether incentivizing SNAP recipients to purchase additional fruits and vegetables was beneficial in increasing such purchases. Social cognitive theory was used as a theoretical framework to address research questions associated with shopping patterns and attitudes and beliefs. This quantitative study used a randomized controlled trial to study differences between incentivized and control groups. The Healthy Incentives Pilot Program (HIP) used a stratified sampling of 55,095 SNAP households receiving benefits between July, 2011, and December, 2012. Statistical analyses (t test, Pearson correlation, and multiple regression analysis) were conducted to identify changes in food shopping patterns and eating behaviors associated with the HIP intervention. Results indicated that (a) incentivizing SNAP recipients leads to an increase in fruit and vegetable purchase, and (b) a correlation exists between fruit and vegetable purchase and attitudes and beliefs. No correlation was found between the intervention and changes in food shopping patterns. Positive social change implications include the improvement of health outcomes in over 43 million people currently enrolled in the SNAP program on a national level.
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Malkin-Washeim, Diana Louise. "Electronic Benefit Transfer: Food Choices, Food Insecurity, and Type 2 Diabetes." ScholarWorks, 2015. http://scholarworks.waldenu.edu/dissertations/1318.
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The purpose of this research was to examine food security for people with prediabetes participating in the Supplemental Nutrition Assistance Program (SNAP), focusing on their food choice decisions and coping strategies over a 30-day benefit cycle that potentially increases the risk of Type 2 diabetes. A cross-sectional, quantitative design based on food choice process model constructs was used. SNAP participants (n = 36) with prediabetes, aged 21â??70 years, were recruited as outpatients from Bronx Lebanon Hospital and completed self-reported questionnaires on demographics and health, food security, and food frequency. Descriptive statistics, Pearson chi square tests, and regression analysis were performed using SPSS. Also, independent t test, and Levene's test were used for ad hoc analysis to assess variation of food choice decisions over 30 days. Of the sample, 5% had low and 95% very low food secure status. Food security status did not predict coping strategies (p = .724); however, food security status and type of coping strategy had a moderate relationship (p < 0.01; r =.60). Food choices of 11 food categories changed over a 30-day cycle with greatest variation for Week 1, compared to Weeks 2â??4 (p < .005). Use of coping strategies to minimize hunger was limited. Very low food security associated with certain coping strategies disrupted eating patterns. Disrupted eating patterns affect food variation over time, increasing the intake of non-nutrient-dense foods and the risk of obesity and Type 2 diabetes. The implications for positive social change include the potential to change SNAP's benefit allotments, make nutrition education mandatory, and create a nutrition package, thereby lowering food insecurity and the risk of Type 2 diabetes.
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Brooks, Alison Suzanne. "Development of an East Tennessee Tri-County Community Food Assessment Instrument to Aid in the Construction and Implementation of a Working Food Model." Digital Commons @ East Tennessee State University, 2005. https://dc.etsu.edu/etd/997.
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The purpose of this study was to determine the needs and relationships of high-risk community members in Cocke County Tennessee to food sources. Cocke County was chosen as the representative county in this pilot study due its high percentage of residents living at or below the poverty level, which can lead to hunger and food insecurities. A community food assessment was conducted among residents participating in a commodities disbursement program in Cocke County. Two hundred seven individuals participated in this survey. The results of the surveys were posted and analyzed using an online statistical analysis software program. With the needs of the Cocke County community identified, steps will be taken to implement a plan of action and the results from this study will also be used as a model to identify needs in both Greene and Hancock counties as well as other counties in the Northeast Tennessee region.
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Chakona, Gamuchirai. "Changes in household food security, nutrition and food waste along an agro-ecological gradient and the rural- urban continuum in mid-sized South African towns." Thesis, Rhodes University, 2017. http://hdl.handle.net/10962/6484.
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The lack of dietary diversity is a severe problem experienced by most poor households globally. Most poor communities are at high risk of inadequate intake of micronutrients resulting from diets dominated by starchy staples. The present study considered the diets, dietary diversities and food security of women of reproductive age between 15-49 years, households and communities along the rural-urban continuum in three mid-sized towns situated along an agro-ecological gradient in South Africa. A 48-hour dietary recall was performed across two seasons (twice in summer and once in winter) and focus group discussions were held to gather all information including food abundance, seasons of food scarcity as well as coping strategies which households employ during periods of food shocks. Households were further asked to quantify any type of food waste that they could have generated in the previous 48 hours. Nutritional status of children under the age of five in all three towns was also measured using height-for-age (HAZ) and mid-upper arm circumference (MUAC) as indicators of stunting and wasting respectively. The household surveys were conducted with 554 women randomly selected in rural, peri-urban and urban locations of Richards Bay, Dundee and Harrismith. For nutritional status, the sample consisted of 216 children who were randomly selected from the sampled households in rural, peri-urban and urban locations of the study sites. Household Dietary Diversity Scores (HDDS) and Women’s Dietary Diversity Scores (WDDS) were calculated from the food items consumed by each household and each woman over a two-day period, respectively. Household food access was also measured for each household using Household Food Insecurity Access Scale (HFIAS). The mean WDDS and HDDS for the wettest site of Richards Bay (3.8±0.29 and 8.44±1.72, respectively) was significantly higher than at Dundee (3.4±0.30 and 7.76±1.63, respectively) and Harrismith (3.5±0.27 and 7.83±1.59, respectively) which were not different from one another. The mean HFIAS for Dundee (9.39±7.13) was significantly higher than that in Richards Bay (5.57±6.98) and Harrismith (6.43±6.59) which were not significantly different from one another. Dietary diversity scores were also significantly higher in urban locations than in peri-urban and rural ones whilst HFIAS was significantly lower in the urban locations than peri-urban and rural locations. There was lower dependence on food purchasing in Richards Bay compared to Dundee and Harrismith where the majority of the population was purchasing most of their food. The majority of Richards Bay households were involved in subsistence agriculture and also produced a surplus for sale, as well as collecting wild foods, which improved food security, unlike Dundee and Harrismith. Food insecurity was higher in rural and peri-urban areas compared to urban areas. In all towns, food was always available throughout the year but was beyond the reach of many households. In urban areas food was readily available and only limited by access, whereas rural populations have limited access to affordable food and face higher prices. The peri-urban populations were more food insecure because of high levels of poverty, unemployment and lack of access/entitlements to land. Periurban dwellers are therefore more sensitive to changes in incomes and food prices because they lack safety nets to absorb income or price shocks as they purchase more, rather than growing their own food. Household dietary diversity was significantly negatively correlated with household food access, that is households with low HDDS had higher HFIAS scores. Due to high levels of food insecurity, a greater percentage of children under the age of five years were stunted (35 %) and wasted (18 %). There were no significant differences in stunting along the agro-ecological gradient, along the rural-urban continuum and sex of child. However, significant differences were observed in child wasting along the agro-ecological gradient with Harrismith having more wasted children than the other two towns, which were not significantly different from each other. Significant differences were also observed between MUAC and sex of child where male children had higher MUAC than females. Wasting was significantly negatively associated with HDDS, with children from households with low HDDS tending to have large MUAC thus showing an inverse association among HDDS and obesity. However, further studies are needed to confirm this finding. In general food insecurity was closely associated with low wealth, food expenditure, large household size and limited access to land. The study did not find any significant role in the use of wild foods and social grants in improving food security for those households who were consuming wild foods and those receiving social grants. Although a greater percentage of households were food insecure, significant amounts of unprepared food (495±179 g per household) were wasted in Richards Bay alone in 48 hours mainly because the food had passed the best before date or had visibly gone bad. The amount of food waste was closely significantly negatively associated with household size. In general, the prevalence of food insecurity and wasting followed the agro-ecological gradient, with households in Richards Bay where the area.
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Stadler, Kathleen M. "Empowerment Process Model for Implementing Participatory Strategies: Testing a Model That Describes the Context of Food and Nutrition Problems of Dominican Women." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30587.
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In this participatory action research study, an Empowerment Process Model (EPM) was tested for the development of feasible action plans that addressed the priority concerns and the implicit food and nutrition problems of village families within their current socio-economic and political context. The Visual Verification Survey (VVS) was used to test the EPM results and its usefulness with similar participants. An EPM with 24 village women and a VVS with 68 village women were purposefully sampled in two locations in Dominica, West Indies, along with key informant interviews with eleven agency leaders to identify, prioritize, and describe their perceptions of villagers' life problems, the root causes of the problems, and solutions. This community-based approach used participatory non-written activities and locally developed visual aids to empower Dominican women to develop feasible action plans: a sewing workshop, how to start a business workshop, coffee house project, and women's group. Thematic content analysis and participatory activities were used to identify the themes and "give voice" to the participants' perceptions of top prioritized life problems: unemployment and economic issues, alcohol and drug abuse, lack of educational services, and teenage pregnancy. When specifically asked, the women identified basic health, food, and nutrition concerns, such as a steady income to buy food, a variety of foods to maintain health, and an accessible, clean water supply. The study revealed substantial differences in the rankings between the EPM and VVS women. The differences may have been influenced by the women's educational level, family situation, and previous involvement in community activities and leadership roles. Similar top prioritized root causes associated with many life problems by the women included lack of educational services, facilities and qualified teachers; and girls exchanging sexual favors for money or possessions. Overall, key informants and the Dominican women participants had similar perceptions of prioritized life problems of typical Dominican families. The results of the research demonstrated the need for site-specific programs and assessments using participatory non-written activities to engage a variety of women and to satisfy their diverse needs and locations. To become effective and sustainable, nutrition programming should be integrated into overall life problems.Ph. D.
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Keller, Sylvia D. "Validation of Peer-Teaching-Peer Paraprofessional Model in Teen Parenting Nutrition Education." DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/390.
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Each year, teen pregnancy occurs in 750,000 15-to-19 year-old women in the United States (U.S.). Utah has the youngest population and the lowest teen abortion rates in the U.S. Approximately 73% of teen pregnancies in Utah result in live births. The prevalence of teen pregnancy and the nutritional risk to mother and child result in a much greater need for social support, such as nutrition education. Current literature shows that the paraprofessional model is effective in increasing positive behavior change through nutrition education. Presently, there is a lack of evidence that paraprofessional teens are capable of accurately and effectively teaching their peers nutrition information.
This pilot study aims to measure the effectiveness of the peer-teaching-peer paraprofessional model in teen parenting nutrition education, and to demonstrate that peer educators ages 18-22 are capable of teaching their peers accurate nutrition information as effectively as adult paraprofessionals.
In this pilot study, two females were trained to become paraprofessional peer educators. To supplement the training of peer educators, this pilot study developed and recorded a nutrition presentation for all six lessons of the paper version Missouri Extension Teen Parenting curriculum. Each trained peer educator taught 10 to 13 clients (ages 14 to 19) over three weeks. For evaluation, the study used pre/post comparisons. Assessment tools include teaching evaluations, pre-post test on nutrition knowledge, 24-hour dietary and physical activity recalls, and behavioral checklist.
There was a significant difference in pre-post tests in knowledge, behavior, and exit survey among participants, indicating that peer educators are able to teach their peers effectively. Although not significant, peer educators' teaching accuracy score was high and improved consistently. Eighty-three of participants like or very much liked to be taught by their peers. Findings from this study showed great potential in having adolescents teach their peers as effectively as older educators.
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Kambhampaty, S. Murthy. "An analytic model of the food comsumption behavior of health-conscious individuals." Diss., Virginia Tech, 1994. http://hdl.handle.net/10919/39736.
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Evidence of changing patterns of food consumption behavior is presented. Previous attempts at explaining these changes are critically reviewed and the need for an alternate approach is identified. A model of consumer behavior in which utility from food consumption is maximized subject to outlay for foods and limits on the consumption of fat, cholesterol, sodium, and/or other food components is proposed. This model yields a system of demands that are functions of prices and outlay as well as the composition of food and limits on the consumption of these components.
The structure of this model is examined and restrictions on consumer food demands are derived. The derivation of individual demands based on the proposed model is demonstrated using a specific indirect utility function. Tests of the joint hypotheses that fat or cholesterol consumption determines food demand are defined. The computation of aggregate food demand elasticities with respect to changes in prices and changes in attributes such as fat or cholesterol consumption is demonstrated. Data necessary for estimating the parameters of the model and testing hypotheses are identified.
The model proposed in this study allows tests of the hypothesis that food demands are not affected by food composition as well as measurement of these effectsPh. D.
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King, Jessica Jane. "Ecologically Friendly Food Buying and Recycling: Environmental Attitudes and Behaviors in a Tennessee Survey." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etd/2257.
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This thesis focuses on pro-environmental attitudes and behaviors and the interactions between recycling behavior, food buying attitudes, food buying behaviors, and ecological beliefs. Following an introductory chapter, I present an article-length paper on recycling behavior to be submitted to Environment and Behavior. Data for this study came from a telephone survey of Tennessee residents (N=270). Using OLS regression analysis, I find that recycling behavior is significantly related to access to recycling facilities. I do not find a significant interaction effect between access to recycling facilities and willingness to recycle. I conclude by suggesting that pro-environmental policies need to make structural resources more available to all in order to promote recycling (and protect the environment in general). Positive attitudes alone do not get us very far. My additional thesis research goal of developing an accurate measure of ecological food buying attitudes and behaviors needs further work.
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Stokes, Strong Kristen Rae. "The Effectiveness of the Teens Reaching Youth 4-H Model in a Childhood Nutirition and Physical Activity Education Program." DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/457.
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Childhood obesity rates are on the rise. There are detrimental physical and psychological health effects associated with childhood obesity. Society needs proven methods of delivering nutrition and physical activity education to children. The Teens Reaching Youth (TRY) 4-H model has been shown to be effective at delivering curriculum in a variety of topics. To assess the effectiveness of the TRY 4-H model at delivering nutrition and physical activity education to youth, grades third through sixth. The program's objectives were to increase youth participants' nutritional knowledge, improve youth participants' eating and fitness habits, and improve leadership and life skills of the teens involved in the TRY 4-H program. We compared three groups of youth grades third through sixth in Northern Utah. We looked at the youth's nutrition knowledge and food preferences as well as their parents/guardians' behaviors. Then two of the groups participated in a nutrition and physical activity education program. One group was taught by TRY 4-H teams and the other group was taught by adult volunteers from the community. After participating in the program, the youth's nutrition knowledge and food preferences and their parents/guardians' behaviors were re-assessed. The control group was unavailable for re-assessment due to limited access. Teen leadership was assessed using a teen leadership and life skills assessment tool. At baseline, the three samples had no statistical differences. The TRY 4-H treatment and Adult Volunteer treatment were found to produce statistically similar nutrition knowledge out-comes. Parents/guardians reported improvements in youth participant nutrition and physical activity habits. Teen members of the TRY teams experienced an increase in leadership and life skills. Teens from the TRY 4-H program are as effective as adult volunteers at teaching younger youth about nutrition. This education delivery method should be utilized in additional communities to aid in the fight against childhood obesity.
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Mutirwara, Ruwimbo. "The development and use of stable isotope analysis of felids’ whiskers as a tool to study their feeding ecology." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2533.
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Thesis (MTech (Nature Conservation))--Cape Peninsula University of Technology, 2017.Stable isotope analysis (SIA) of whiskers has been used to identify temporal feeding habits, intra-population diet variation, as well as individual dietary specialisation of marine and terrestrial carnivores. However, the potential of the method to disclose such dietary information for large wild felids has been little explored. The accurate interpretation of stable isotope ratios along serially sampled whiskers is hampered by lack of information on species-specific whisker growth rates, whisker growth patterns and whisker-diet trophic discrimination factors (TDFs). Whisker growth rate and growth pattern informs on the time period encapsulated in the analysed segment of a whisker, while whisker-diet TDFs are required to make correct deductions of the prey species consumed by a predator. The aim of this study was to develop and evaluate the technique of using stable carbon and nitrogen isotope analysis of felid whiskers to quantify the diet of wild felids and in particular, to identify diet variation among individuals. To achieve this, lion Panthera leo and leopard Panthera pardus whisker growth rate and growth pattern, and lion whisker-diet TDFs were measured, using captive individuals held at the National Zoological Gardens, Pretoria. The viability and applicability of the technique was then explored on six free-ranging leopards in Phinda Private Game Reserve (hereafter Phinda), northern KwaZulu-Natal (KZN) whose diets have been intensively studied using traditional methods. Whisker growth rates and growth patterns were measured for four lions (three sub-adult females and one adult male) and an adult male leopard over 185 days using giraffe Giraffa camelopardalis meat as an endogenous biomarker to consecutively mark whiskers as they grew. The 13C-depleted, C3-derived giraffe meat with its characteristic isotopic signature could be discerned from the 13C-enriched diet of C4 grain-fed beef and chicken the felids were sustained on. Two whiskers were removed from each felid at the beginning of the experiment, and felids were fed the giraffe meat at four predetermined periods to mark the whiskers replacing the removed ones. The periods with low δ13C values, identified following serial sectioning of the regrown whiskers at 1 mm intervals (and stable isotope analysis of these sections), were then correlated to specific giraffe meat feeding bouts and hence growth periods. Knowledge of the duration between giraffe meat feeding bouts enabled the calculation of whisker growth rate and determination of growth pattern. δ13C and δ15N whisker-diet TDFs were estimated for five lions whose diet remained consistent over multiple years. Whiskers removed from four lions at the beginning of the whisker growth experiment, a whisker removed from a female lion as part of a pilot study a year before the experiment and the diet (chicken and beef) samples collected during the experiment were analysed for their isotopic ratios. These were used to calculate isotopic differences between lion whiskers and diet.
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Venter, Irma. "Development and evaluation of a food frequency questionnaire to assess daily total flavonoid intake using a rooibos intervention study model." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80019.
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Thesis (PhD)--Stellenbosch University, 2013.ENGLISH ABSTRACT: A comprehensive food frequency questionnaire (FFQ) was developed to assess the daily total flavonoid intake over the past fortnight within a 14-week intervention that consisted of four periods to determine the effect of rooibos consumption on oxidative stress in adults (n=40) at intermediate to high coronary heart disease (CHD) risk. Within the intervention the comprehensive FFQ validity (against six estimated dietary records and biomarkers), reproducibility (on administrations in the washout and control periods six weeks apart as these periods had similar flavonoid intake restrictions) and responsiveness (across the four intervention periods of changed dietary conditions) was evaluated. The baseline period dietary record and FFQ dietary sources found to contribute most to the participants’ daily total flavonoid intake, considering the percentage contribution, and the between-person variation in intake, considering the stepwise multiple regression analysis, formed the food list of the resultant abbreviated FFQ. The validity, reproducibility and responsiveness of the latter were also evaluated within the intervention and its validity (against dietary records) and reproducibility (on re-administration two weeks apart) in an additional group (n=90) being at low and intermediate CHD risk to evaluate its external strength. The validity and reproducibility evaluations of the comprehensive and abbreviated FFQs in the intervention and abbreviated FFQ within the additional group comprised paired difference tests (to establish the ability to estimate group intakes), correlation coefficients (to establish the ability to rank individual participants), category agreement and gross misclassification next to the weighted kappa statistic (to establish the ability to classify the participants into tertiles and quintiles of intake) and Bland-Altman plots (as representation of the limits of agreement between the two dietary assessment methods). Correlation coefficients were also used for biomarker validity evaluations in the baseline period. The repeated measures analysis of variance (ANOVA) (Bonferroni correction) was used for the responsiveness evaluations of the comprehensive and abbreviated FFQs across the intervention periods alongside that of the biomarkers as evidence for the changed dietary conditions. The study demonstrated that the comprehensive FFQ could be modified to a format with a brief food list as few items contributed appreciably to the total flavonoid intake and of which most also contributed to the between-person intake variability. The comprehensive and moreover the abbreviated FFQ in the validity evaluations provided sufficiently accurate daily total flavonoid intake estimates. They could determine the intake at group level in correspondence with that of the dietary records. The participant intakes could additionally be categorized and in particular ranked greatly alike to the dietary record intakes. The Bland-Altman plots revealed proportional bias regarding overestimation at the higher intake level. The reproducibility also appeared to be greatly satisfactory although seasonal fruit exclusions from the abbreviated FFQ food list may hamper its repeated administration. Both FFQs also confirmed the changed total flavonoid intakes across the intervention periods in relation to changes in the expected direction concerning the plasma total polyphenol, conjugated diene and thiobarbituric acid reactive substance concentrations.
AFRIKAANSE OPSOMMING: ‘n Omvattende voedsel frekwensie vraelys (VFV) is ontwikkel om die daaglikse totale flavonoïed inname oor twee agtereenvolgende weke te beraam te midde van ‘n 14-week intervensie. Die intervensie het uit vier periodes bestaan wat die effek van rooibosinname op oksidatiewe stres in volwassenes (n=40), met ‘n intermediêre tot hoë koronêre hartsiekte (KHS) risiko, bepaal het. Binne die intervensie is die geldigheid (teen ses geskatte dieetrekords en biochemiese merkers), herhaalbaarheid (op aanwending ses weke uitmekaar in die uitwas en kontrole intervensie periodes met dieselfde flavonoïed inname bepalings) en waarneembaarheid (oor vier intervensie periodes van veranderde dieet bepalings) van die omvattende VFV geëvalueer. Die dieetbronne in die basislyn periode dieetrekords en vraelyste wat die meeste tot die deelnemers se daaglikse totale flavonoïed inname (baseer op die persentasie bydrae) en die tussen-persoon variasie in inname (baseer op die stapsgewyse meervuldige regressie analise) bygedra het, het die voedsellys van die voortvloeiende verkorte VFV gevorm. Die geldigheid, herhaalbaarheid en waarneembaarheid van dié VFV is binne die intervensie geëvalueer en die geldigheid (teen dieetrekords) en herhaalbaarheid (heradministrasie twee weke later) daarvan in ‘n verdere groep (n=90) met lae en intermediêre KHS risiko as evaluasie van die eksterne vermoë van die VFV. Die geldigheid en herhaalbaarheid evaluasies van die omvattende en verkorte VFV in die intervensie en die verkorte VFV in die verdere groep het bestaan uit gepaarde verskil toetse (bepaling van die groepinname skattingsvermoë), korrelasie koëffisiënte (bepaling van individuele deelnemer rangorde skattingsvermoë), kategorie ooreenstemming en erge wanklassifikasie naas die aangepaste kappa statistiek (bepaling van die vermoë om die deelnemer innames in derdes en vyfdes te klassifiseer) en die Bland-Altman karterings (verteenwoordiging van ooreenstemmingslimiete tussen die twee dieetinname metodes). Korrelasie koëffisiënte is ook gebruik vir biochemiese merker geldigheid evaluasies in die basislyn periode. Die herhaalde metings analise van variansie (ANOVA) (Bonferroni regstelling) is gebruik om die waarneembaarheid evaluasies van die omvattende en verkorte VFV oor die intervensie periodes naas dit van die biochemiese merkers te evalueer as bewys van die veranderde dieet bepalings. Die studie het aangedui dat die omvattende VFV gewysig kon word tot ‘n formaat met ‘n verkorte voedsellys omdat slegs ‘n aantal items merkbaar tot die totale flavonoïed inname bygedra het en die meeste hiervan ook tot die tussen-persoon variasie in inname. Die omvattende en die verkorte VFV het in die geldigheid evaluasies daarvan voldoende akkurate daaglikse totale flavonoïed inname skattings opgelewer omdat groep innames bepaal kon word in ooreenstemming met dit verkry van die dieetrekords en die deelnemer innames bykomend kategoriseer en in besonder grootliks eenders rangeer kon word as met hul dieetrekord innames. ‘n Proporsionele oorskatting by die hoër inname vlakke is wel vir al twee getoon in die Bland-Altman karterings. Die herhaalbaarheid was ook grootliks aanvaarbaar, alhoewel seisoenale vrugte uitsluitings in die verkorte VFV voedsellys die heruitvoering kan bemoeilik. Al twee vraelyste kon ook die veranderinge in die daaglikse totale flavonoïed inname oor die intervensie periodes bevestig in ooreenstemming met veranderinge in die verwagte rigting van die plasma totale polifenool, konjugaat diëne en tiobarbituursuur reaktiewe stof konsentrasies.
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Bengtsson, Julia. "Påverkar information kring näringsinnehåll och ekologisk hållbarhet fysiskt aktiva konsumenters attityder till insekter som mat?" Thesis, Högskolan Kristianstad, Fakulteten för naturvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-22211.
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Nuvarande matkonsumtion världen över bidrar till den globala miljöförstöringen. För att kunna främja en hållbar utveckling behöver alternativa näringskällor nyttjas och insekter är ett näringsriktigt livsmedel med hög proteinkvalitet som kan ersätta andra traditionella animaliska produkter. Insekter som mat är i västvärlden vanligen förknippat med negativa attityder som avsky och neofobi vilket förhindrar en global kosthållning som innefattar insekter. Fysiskt aktiva konsumenter har ofta ett engagemang i att uppnå en balanserad kost med tillräckligt med energi och näring. Syftet med studien är att undersöka fysiskt aktiva konsumenter och deras attityder till insekter som mat och jämföra om dessa påverkas av information om näringsinnehåll och ekologisk hållbarhet. Studien syftar också till att ta reda på hur deras attityder kan användas för att kunna presentera insekter som mat på ett attraktivt sätt. Studien är genomförd som en webbaserad enkätundersökning. Enkäten föregicks, för hälften av deltagarna, av information om insekter som mat utifrån ekologisk hållbarhet och näringsinnehåll. Studien, i en jämförelse mellan de båda grupperna att den typ av information som deltagarna erhöll, inte gav någon signifikant inverkan på fysiskt aktiva konsumenters attityder till insekter som mat. Acceptans av mat är ett komplext fenomen och kräver att konsumenterna får tid att vänja sig ex vid att äta insekter genom att minska avskyn successivt. Resultatet visar att det kan göras genom att servera malda insekter i en välkänd livsmedelsprodukt.Current food consumption worldwide contributes to global environmental degradation. In order to promote sustainable development, alternative nutritional sources need to be used and insects are a nutritious food with high protein quality that can replace other traditional animal products. Insects as food are in the western world usually associated with negative attitudes such as disgust and neophobia, which prevents a global diet that includes insects. Physically active consumers are often dedicated to a balanced diet with enough energy and nutrition. The aim of this study is to analyze physically active consumers and their attitudes to insects as food and compare whether these are affected by information on nutritional content and ecological sustainability. The study also aims to find out how their attitudes can be used to present insects as food in an attractive way. The study was conducted as a web-based survey. The survey was preceded, for half of the participants, by information about insects as food based on ecological sustainability and nutritional content. The study, in a comparison between the two groups, found that the type of information the participants received did not have a significant impact on physically active consumers' attitudes towards insects as food. Acceptance of food is a complex phenomena and requires consumers to have time to get used to eating insects, for example, by gradually reducing disgust. The results show that this can be done by serving ground insects in a well-known food product.
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Kim, Changmin. "Effect of Iron on Residual Nitrite Level in Ground Pork and Model Systems." DigitalCommons@USU, 1985. https://digitalcommons.usu.edu/etd/5302.
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The effects of iron, temperature, and presence of botulinal spores or sodium ascorbate on depletion of nitrite level were determined in meat and model systems. Higher temperature and presence of botulinal spores definitely increased nitrite depletion in a meat system. Added hemoglobin also significantly increased nitrite depletion, while ferrous iron and ferric iron did not significantly decrease nitrite level in a meat system. High temperature and presence of sodium ascorbate increased nitrite depletion in a model system. Only ferrous iron significantly decreased nitrite level in the absence of ascorbate, while ferric iron, heme iron, and ferritin iron did not decrease nitrite level in the absence of ascorbate. Ferrous iron, ferric iron, and heme iron decreased nitrite level in the presence of ascorbate, while ferritin iron did not decrease nitrite level in a model system.
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Achilich, Kristyn Dumont. "Using The Community Readiness Model As A Framework To Understand A Community's Preparedness To Increase Food Access." ScholarWorks @ UVM, 2015. http://scholarworks.uvm.edu/graddis/504.
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The work described herein is situated in a larger study investigating regional food systems as a method for improving food access for vulnerable communities. This research is part of the United States Department of Agriculture's Agriculture and Food Research Initiative project titled Enhancing Food Security in the Northeast for Underserved Populations (EFSNE). This work is ongoing and currently in year five of five. One of the primary objectives in year five is to facilitate the development of Learning Communities in each of the eight communities participating in the study. To do so, the research team planned to develop tools and strategies for facilitation. The team identified a need to match strategies to the specific situation of each community. Thus, a tool was identified that might be useful in assessing the needs and readiness of the communities with respect to their access to healthy food sources. This research simultaneously evaluated the usefulness of the tool while assessing community readiness in six of the eight project communities.
The tool used in this study, was a community level behavioral change model, the Community Readiness Model (CRM). The model was originally developed by the Tri-Ethnic Center in Colorado. We followed the CRM protocol for identifying participants. Twenty-four individuals from six locations involved in the EFSNE study participated in the interview process. The interviews were conducted using the semi-structured interview guide provided in the CRM protocol. We amended the guide by tailoring questions to address food access and ensuring questions were asked at the five levels of influence found in the Socio-Ecological Model. The final guide contained 40 questions; 18 were required by the protocol to score each community. Interviews were conducted by telephone by one researcher, transcribed, and then scored by two researchers according to the CRM protocol.
The mean overall readiness score for the six communities assessed was 4.9 (SD 1.0). This score is firmly rooted in the pre-planning stage of readiness. Scores ranged from 3.7 to 6.2 on the 9-point scale. The CRM scoring protocol coupled with the overall readiness scores indicated that the three urban communities scored higher (mean 5.7, SD 0.6) than the three rural communities (mean 4.1, SD 0.7). While we found a utility to having scores on a continuum to quickly assess the communities of study, we found the qualitative data obtained from the interview process imperative to understanding the scores and the communities.
We concluded that with a few amendments, the Community Readiness Model is a useful methodology to understand food access at the community level. Revealing the stages of readiness for food access change in the study communities contributed to our understanding of what types of programs exist for food access, what the communities' attitudes and feelings are around food access and guided strategy development for moving readiness for change forward. This lens also revealed that there is a need for education on existing and development of new food access policies. Furthermore, this work contributes to the practice of assessing community food security while simultaneously contributing to the development of parameters for community food security theory in food systems scholarship.
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Nishikawa, Yuko. "Naringenin Attenuates Metabolic Disturbances in C-26 Cancer Cachexia Mouse Model: Transitional Study for Human Application." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563983598733999.
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Wang, Qin. "Review on Mechanistic Effect Models Used in Ecological Risk Assessment of Pesticides According to the European Food Safety Authority Guidance." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-38301.
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In ecological risk assessment, mechanistic effect models (MEMs) are thought to overcome the limitation of standard laboratory single species test by accurately extrapolating the models to population-level. This review introduces the basic theory of MEMs-dynamic energy budget theory which can connect with toxicokinetic/ toxicodynamic models to describe the interaction of toxicants and organisms. This review summarizes some typical MEMs which simulate different scenarios, pesticides and species, and compared their modelling performance according to the guidance on good effect models of European Food Safety Authority, in order to judge if it is accounting for all modelling steps. In addition, a summary of the linkage of MEMs in pesticides ecological risk assessment have been discussed, especially evaluating the linkage results of ‘MODELINK’ workshop. However, there is no genuine application of MEMs in pesticides ecological risk assessment in real world today, because there is no validated model built with acceptable predictive power to motivate the ecological assessors or shareholders to use effect models confidently. Therefore, there is still a long way to develop an effect model which is valid enough and has strong prediction power.
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Quick, Virginia, Jennifer Martin-Biggers, Gayle Povis, Nobuko Hongu, John Worobey, and Carol Byrd-Bredbenner. "A Socio-Ecological Examination of Weight-Related Characteristics of the Home Environment and Lifestyles of Households with Young Children." MDPI AG, 2017. http://hdl.handle.net/10150/624973.
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Home environment and family lifestyle practices have an influence on child obesity risk, thereby making it critical to systematically examine these factors. Thus, parents (n = 489) of preschool children completed a cross-sectional online survey which was the baseline data collection conducted, before randomization, in the HomeStyles program. The survey comprehensively assessed these factors using a socio-ecological approach, incorporating intrapersonal, interpersonal and environmental measures. Healthy intrapersonal dietary behaviors identified were parent and child intakes of recommended amounts of 100% juice and low intakes of sugar-sweetened beverages. Unhealthy behaviors included low milk intake and high parent fat intake. The home environment's food supply was found to support healthy intakes of 100% juice and sugar-sweetened beverages, but provided too little milk and ample quantities of salty/fatty snacks. Physical activity levels, sedentary activity and the home's physical activity and media environment were found to be less than ideal. Environmental supports for active play inside homes were moderate and somewhat better in the area immediately outside homes and in the neighborhood. Family interpersonal interaction measures revealed several positive behaviors, including frequent family meals. Parents had considerable self-efficacy in their ability to perform food-and physical activity-related childhood obesity protective practices. This study identified lifestyle practices and home environment characteristics that health educators could target to help parents promote optimal child development and lower their children's risk for obesity.
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Teratanavat, Ratapol. "Essays on consumer purchase decisions and health and nutrition information on functional foods." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1102736176.
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Thesis (Ph. D.)--Ohio State University, 2005.Title from first page of PDF file. Document formatted into pages; contains xv, 188 p.; also includes graphics (some col.) Includes bibliographical references (p. 154-169).
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Sievers, Katja. "Predicting ecological impacts of climate change and species introductions on a temperate chalk stream in Southern Britain : a dynamic food web model approach." Thesis, Bournemouth University, 2011. http://eprints.bournemouth.ac.uk/19386/.
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To predict the impact of future disturbances such a climate change and introduction of non-native species on ecosystems, it is important to understand how disturbances may affect community composition. This is inherently diffcult since species may be expected to respond differently to disturbances such as elevated temperatures or the introduction of a new species. Furthermore, since the species in an ecosystem are interlinked by energy, nutrient and information transfers, disturbances may be amplified or absorbed, depending on the nature of the disturbance and the resilience of the ecosystem. Some species have a disproportionate effect on ecosystem function and are often referred to as keystone species. By definition the loss of a keystone species causes a catastrophic change in community composition. Therefore, the identification of keystone species could help to target conservation efforts more effciently. A dynamical food web model, representative for a chalk stream (the River Frome, Dorset) was developed and manipulated. Changes in community composition and biodiversity were assessed. For the identification of keystone species each species node was removed in turn. Although impacts were found, particularly after the removal of important prey nodes and top predators, no catastrophic shift was observed and, consequently, no keystone species were identified. Impacts of species introductions were assessed by adding representative model species to the food web. The largest impact was observed after the addition of a small competitor at intermediate trophic level. The addition of a top predator had moderate impact, whereas no negative impact was found after the addition of a larger bodied species at intermediate trophic level. Possible impacts of climate change, specifically elevated temperatures, were assessed by increasing the metabolic rates of the species nodes. No impacts were found, when energy inputs were raised accordingly, but severe impacts, were observed when energy inputs were restricted. In general, the ecosystem was considered fairly resilient to most of the tested disturbances, possibly owing to the high natural variability of the community. The findings of current study suggest that rather than focusing conservation efforts on single species, the focus should be on 'keystone structures' that maintain high ecosystem resilience.
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Quiner, Trevor Elisha. "Chemopreventive Effects of Dietary Selenium and Soy Isoflavones in a Mouse Model of Prostate Cancer." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2541.
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Prostate cancer is the most commonly diagnosed non-skin cancer in men and the second leading cause of cancer death in the United States. Prostate cancer, like many cancers, is a disease that generally requires a long period of time to develop and grow before it becomes detectable. This long period of latency makes prostate cancer a candidate for dietary chemoprevention. Soy and selenium (Se), are associated with a decreased risk of prostate cancer. We previously showed that high dietary intake of selenium (Se) and soy isoflavones decreased the expression of the androgen receptor (AR) and AR-regulated genes in the prostates of healthy rats. In this study we hypothesized that the downregulation of AR and AR-regulated genes would inhibit tumorigenesis in the transgenic adenocarcinoma of the mouse prostate (TRAMP) mouse. Mice were fed one of two stock diets with or without a supplement of Se in a 2 X 2 factorial design. The stock diets provided high or low dietary isoflavones. Mice were exposed to the diets from conception and sacrificed at 18 or 24 weeks of age. Prostate histopathology, urogenital tract (UGT) weight, serum IGF-1 levels, and the expression of AR and AR-regulated genes in the dorsolateral prostate was examined using quantitative PCR and Western blotting. Urogenital tract (UGT) weight was reduced compared to control in all dietary groups containing high Se, isoflavones, or both at 24 weeks (p<0.005). Dietary isoflavones delayed tumor progression and downregulated protein levels of AR, AR-regulated genes, and upregulated the protective FOXO1 and FOXO3a transcription factors. High dietary isoflavones also decreased the phosphorylation of the IGF-1R. The only main effect of Se was the upregulation of AKR1C14 the enzyme that deactivates 5&aplha;-DHT.This study identifies a previously unknown effect of isoflavones in the upregulation of FOXO expression and confirms previous studies of isoflavones' anticancer effects. Further research is needed to find a protective dose or form of Se and to elucidate the mechanism of isoflavones.
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Lee, Kyung Ah. "Analysis of the Total Food Folate Intake Data from the National Health and Nutrition Exa-amination Survey (Nhanes) Using Generalized Linear Model." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/math_theses/80.
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The National health and nutrition examination survey (NHANES) is a respected nation-wide program in charge of assessing the health and nutritional status of adults and children in United States. Recent cal research found that folic acid play an important role in preventing baby birth defects. In this paper, we use the generalized estimating equation (GEE) method to study the generalized linear model (GLM) with compound symmetric correlation matrix for the NHANES data and investigate significant factors to ence the intake of food folic acid.
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Lin, Yangchen. "Macroscopic insights from mechanistic ecological network models in a data void." Thesis, University of Cambridge, 2015. https://www.repository.cam.ac.uk/handle/1810/254976.
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Complexity science has come into the limelight in recent years as the scientific community begins to grapple with higher-order natural phenomena that cannot be fully explained via the behaviour of components at lower levels of organization. Network modeling and analysis, being a powerful tool that can capture the interconnections that embody complex behaviour, has therefore been at the forefront of complexity science. In ecology, the network paradigm is relatively young and there remain limitations in many ecological network studies, such as modeling only one type of species interaction at a time, lack of realistic network structure, or non-inclusion of community dynamics and environmental stochasticity. I introduce bioenergetic network models that bring together for the first time many of the fundamental structures and mechanisms of species interactions present in real ecological communities. I then use these models to address some outstanding questions that are relevant to understanding ecological networks at the systems level rather than at the level of subsets of interactions. Firstly, I find that realistic red-shifted environmental noise, and synchrony of species responses to noise, are associated with increased variability in ecosystem properties, with implications for predictive ecological modeling which usually assumes white noise. Next, I look at simultaneous species extinction and invasion, finding that as their individual impacts increase, their combined impact becomes decreasingly additive. In addition, the greater the impact of extinction or invasion, the lesser their reversibility via reintroduction or eradication of the species in question. For modifications of pairwise species interactions by third-party species, a phenomenon that has so far been studied one interaction at a time, I find that the many interaction modifications that occur concurrently in a community can collectively have systematic effects on total biomass and species evenness. Finally, examining a higher level of organization in the form of compartmentalized networks, I find that the relationship between intercompartment connectivity and the impacts of species decline depends considerably on network topology and whether the consumer-resource functional response is prey- or ratio-dependent. Overall, the results vary considerably across model communities with different parameterizations, underscoring the contingency and context dependence of nature that scientists and policy makers alike should no longer ignore. This work hopes to contribute to a growing multidisciplinary understanding, appreciation and management of complex systems that is fundamentally transforming the modern world and giving us insights on how to live more harmoniously within our environment.
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Jumento, Theresa. "Nutrition Services, Viral Suppression, CD4, and Retention in Ryan White Program Participants." ScholarWorks, 2017. https://scholarworks.waldenu.edu/dissertations/3351.
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The Ryan White HIV/AIDS Program (RWHAP) provides HIV-related medical and support services for uninsured and underinsured people living with HIV (PLWH) in the United States. In addition to HIV-related medical care, the program provides medical nutrition therapy and food assistance. The role of nutrition in the health of PLWH is well-documented, especially in resource poor areas; however, the role of medical nutrition therapy and food assistance provided through the RWHAP in resource rich areas is not well documented. This study addressed the association between the nutrition services of food assistance and medical nutrition therapy and the HIV-related health outcomes of viral suppression, retention in care, and CD4 counts. The behavioral model for vulnerable populations was used as the theoretical foundation for this quantitative cross-sectional study. A sample of 428 RWHAP clients was used from the Ryan White Services Report data. Pearson's chi-square was used to examine the association between medical nutrition therapy (MNT) and viral suppression. Findings indicated statistically significant associations between MNT and viral suppression, retention in care and any nutrition service (food assistance, MNT, or both), and MNT and retention in care. Implications for social change include emphasizing the role of nutrition services in HIV-related health outcomes for PLWH in resource rich areas.
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Lazo-Durand, Rafaela, Jose Rojas-Garcia, Carlos Torres-Sifuentes, and Carlos Raymundo. "Lean Startup in a Commercial Management Model Based on Digital Marketing to Increase Sales in Companies of the Health Food Industry." Smart Innovation, Systems and Technologies, 2021. http://hdl.handle.net/10757/653802.
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El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.In 2018, the Ministry of Health of Peru reported that more than 50% of the Peruvian population suffers from obesity. In total, 40% of the people affected by this disease are in the metropolitan area of Lima. Moreover, a report by the newspaper Gestión states that, on average, each Peruvian citizen consumes 52 kg of ultra-processed food per year. These alarming figures show that a change in the lifestyle of the citizens of Lima is necessary. It is imperative to increase peoples’ awareness of the importance of leading a healthy lifestyle, which in turn means improving eating habits and exercising. Given the increase of people with health problems caused by poor nutrition, the manufacture of health products, such as nut butter, must be natural, without added sugar, hydrogenated oils, added chemicals, or preservatives. Nuts belong to the group of energy foods and eating them provides great health benefits and helps fight obesity. They are a source rich in proteins and healthy fat, provide energy, and contain vitamins and antioxidants, among other benefits. They are also suitable for vegetarians, vegan, celiac, and diabetic people. Therefore, the manufacture and sale of handmade nut butter is a business opportunity in Lima. To prove this, the lean startup methodology was used, and through the development of viable minimum products, the viability of the project was evidenced. The project management bases of the Project Management Institute (PMI) are used as guidelines to develop the project, and digital marketing tools are applied to make the products known to the target market.
Revisión por pares
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Zhou, Albert Lihong. "Bioactivities of Milk Polar Lipids in Influencing Intestinal Barrier Integrity, Systemic Inflammation, and Lipid Metabolism." DigitalCommons@USU, 2013. http://digitalcommons.usu.edu/etd/1517.
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The purpose of lactation is for nutrient provision and also importantly for protection from various environmental stressors. Milk polar lipids reduce cholesterol, protect against bacterial infection, reduce inflammation and help maintain gut integrity. Dynamic interactions within dietary fat, lipid metabolism, gut permeability and inflammatory cytokines remain unclear in the context of obesity and systemic inflammation. A rat model and three mouse models were developed to test the hypotheses that dietary milk polar lipids may affect lipid metabolism and intestinal integrity and may protect against systemic inflammation in the context of stressful diet, systemic inflammation, and obesity. The milk polar lipids isolates had complex effects on lipid metabolism and associated gene expression in the rat model. There were complex dynamics in lipid metabolism, gut permeability and systemic inflammation at different time points in all mouse models. The milk phospholipids increased gut permeability in genetic and diet-induced obesity and during the lipopolysaccharide (LPS) -induced inflammation. The phospholipids increased the plasma LPS level in genetic obesity and during the LPS stress. The phospholipids reduced liver mass and liver lipids in genetic obesity and during the LPS-induced inflammation. The phospholipids increased the body fat in the diet-induced obesity model. The milk gangliosides did not significantly affect gut permeability, systemic inflammation, and lipid metabolism in all three mouse models. Current estimate by the Centers for Disease Control is that about 1/3 Americans are obese (body mass index, BMI ≥ 30) and 1/3 Americans are overweight (25 ≤ BMI < 30). More than 25% of Americans today have a fatty liver which could lead to further health problems. The data from this dissertation shed light on the complicated interrelationships between gut permeability, systemic inflammation, and lipid metabolism in obesity. The results contribute to our understanding of the bioactivities of milk polar lipids and provide scientific evidence for the role of milk polar lipids rich materials in affecting biological functions. The study of the influence of milk polar lipids on gut barrier integrity adds new information on understanding the mechanisms of gut leakiness and recovery. The investigation of the impact of milk polar lipids on lipid metabolism reveals new perspectives for the development of diet-induced obesity.
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Tice, Meghan A. "A Spoonful of Salt Helps the Vegetables Go Down: Exploring the Processing of Health and Nutrition-related Claims in Advertising." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/32671.
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In light of recent persuasive appeals which promote a food productâ s health or nutritional benefits in advertisements, this exploratory study investigates the ways in which individuals read and understand health and nutrition-related claims in advertising and make subsequent judgments about the product, brand, and purchase intentions. Using the Elaboration-Likelihood model of persuasion, this study looks at how motivational (e.g., health consciousness, need for cognition) and ability (nutrition knowledge) factors influence attitudes toward three food products following exposure to manipulated advertisements containing a nutrition-related claim. Although the results do not demonstrate much support for the predicted relationships, the findings nonetheless provide researchers useful information that may benefit future studies.Master of Arts
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Henrikson, Lael Suzann 1959. "Ponds, rivers and bison freezers : evaluating a behavioral ecological model of hunter-gatherer mobility on Idaho's Snake River Plain." Thesis, University of Oregon, 2002. http://hdl.handle.net/1794/9458.
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xviii, 326 p. : ill. (some col.), maps. A print copy of this title is available through the UO Libraries under the call number: KNIGHT GN799 .F6 H46 2002Archaeological evidence indicates that cold storage of bison meat was consistently practiced on the eastern Snake River Plain over the last 8000 years. Recent excavations in three cold lava tube caves have revealed a distinctive artifact assemblage of elk antler tines, broken handstones, and bison bone in association with frozen sagebrush features. Similar evidence has also been discovered in four other caves within the region. A patch choice model was utilized in this study to address how the long-term practice of caching bison meat in cold caves may have functioned in prehistoric subsistence patterns. Because the net return rate for bison was critical to the model, the hunting success of fur trappers occupying the eastern Snake River Plain during the early 1800s, as recorded in their daily journals, was examined and quantified. According to the model, the productivity of cold storage caves must be evaluated against the productivity of other patches on the eastern Snake River Plain, such as ephemeral ponds and linear river corridors from season to season and year to year. The model suggests that residential bases occurred only within river resource patches while ephemeral ponds and ice caves would contain sites indicative of seasonal base camps. The predictions of the model were tested against documented archaeological data from the Snake River Plain through the examination of Geographic Information Systems data provided by the Idaho Bureau of Land Management. The results of this analysis indicate that seasonal base camps are directly associated with both ephemeral and perennial water sources, providing strong support for the model's predictions. Likewise, the temporal distribution of sites within the study area indicates that climate change over the last 8000 years was not dramatic enough to alter long-term subsistence practices in the region. The long-term use of multiple resource patches across the region also confirms that, although the high return rates for bison made them very desirable prey, the over-all diet breadth for the eastern Snake River Plain was broad and included a variety of large and small game and plant foods. Bison and cold storage caves were a single component in a highly mobile seasonal round that persisted for some 8000 years, down to the time of written history in the 19th Century.
Committee in charge: Dr. C. Melvin Aikens, Chair; Dr. Lawrence Sugiyama ; Dr. Jon Erlandson ; Dr. Dennis Jenkins ; Dr. Cathy Whitlock ;
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Anderson, Robert Scot. "DETERMINATION OF A QUANTITATIVE DESCRIPTIVE LANGUAGE FOR FRESHWATER PRAWN (MACROBRACHIUM ROSENBERGII) AND CONSUMER ACCEPTANCE BASED ON A WILLINGNESS-TO-PAY MODEL." Master's thesis, Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-03302008-103841.
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Soontrunnarudrungsri, Aussama. "Development and validation of screening tools for classification consumers of food products based on eating healthy criteria." Diss., Kansas State University, 2011. http://hdl.handle.net/2097/12132.
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Doctor of PhilosophyDepartment of Human Nutrition
Edgar Chambers IV
Because healthy food products do not have a specific tool used for consumer screening based on consumers’ diet or degree of healthy eating habits, this study aimed to determine a set of questions that could classify consumers who belong in a different status according to the Stages of Change model, including those who have a different diet quality based on their Healthy Eating Index (HEI) score. The surveys were conducted in the United States (US) and Thailand in order to determine applicability to varying countries. The Food Neophobia Scale (FNS), Food Involvement Scale (FIS), and Health and Taste Attitude Scale (HTAS) were included in the questionnaire together with a set of Stages of Change questions and a 7-day, self-administered food recall questionnaire. The HEI interpretation of US and Thai consumer scores illustrated that the majority of both belonged to the Need Improvement group. The Stages of Change model indicated most consumers thought they had healthy diets. According to FNS, FIS, and HTAS, US consumers are more involved in food activities and are more open to trying new foods or unfamiliar foods than Thais. Furthermore, consumers who belong in different groups, according to the Stages of Change model, responded differently to some HTAS subscales. However, statements from FNS, FIS, and HTAS were not capable of distinguishing consumers belonging in different groups according to HEI scores or belonging in different stages according to the Stages of Change Model. Considering all possible methods from those listed above for screening consumers, the Stages of Change model may be the best way to segment consumers interested in healthier eating. Using the Stages of Change required less time and the least effort from consumers because there were only three questions; and interpreting results does not require calculation or analysis.
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Hooge, Susan E. "Impact of potassium chloride on saltiness, bitterness, and other sensory characteristics in model soup systems." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/691.
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Macari, Marisa. "Contextualizing food practices and change among Mexican migrants in West Queens, New York City." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:bb478389-8caf-49e4-96b2-2d57b0389c9f.
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This thesis is about food practices and change among Mexican migrants living in West Queens, New York City. Public health research suggests that Mexican migration to the US has a negative impact on food practices, with diets being less nutritious over a migrant’s stay in the United States and obesity being more common among longer-term than more recently-arrived individuals. Through ethnography, I explore how migration shapes food practices and examine the nuanced process of nutritional change that is often obscured in large-scale epidemiological studies. Food practices are important not just because they shape vulnerabilities to chronic diseases but also because they serve as prisms by which to examine migrants’ lives, pressures and aspirations. The three aims of this ethnography are to explore the food practices that Mexicans engage in after migration; to examine the social, temporal and political-economic contexts shaping food practices and change; and to describe how migrants themselves makes sense of nutritional change. I explore these themes using the approach of structural vulnerability, which views health practices and outcomes as influenced by social structures, relationships and inequalities. In so doing, I provide a critique of the public health literature’s use of the concept of acculturation to explain food practices, which largely obscures the role played by structural contexts and constraints. Through participant observation, conversations and interviews with Mexican migrants in West Queens, NYC, I have identified three contexts shaping food practices and change after migration: household dynamics and labour division; time constraints and work schedules; and the ‘food environment’, referring to the availability of food items and weight loss products. Gender dynamics, documentation status and class modified the way in which these contexts were perceived and negotiated by informants, which had further consequences on food practices. In these settings, informants were often encouraged to consume high-energy foods and large portions, to replace meals with snacks, to eat prepared or convenience foods, and to experiment with weight loss products. To rationalize nutritional change and body size disparities, informants employed multiple discourses. Some discourses emphasized the role of structural contexts and constraints related to time, money and documentation status, while others emphasized the role played by cultural beliefs, habits and acculturation. An ethnographic approach informed by structural vulnerability serves to articulate how the everyday lives and social contexts in which Mexican migrants are embedded, shape experiences of nutritional change. This thesis exposes a disconnect between the way in which the public health literature conceptualizes nutritional change and how it is lived ‘on the ground’.
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Sakita, Saori. "Development and Use of a Physiologically Based Mathematical Model Describing the Relationships and Contributions of Macronutrients to Weight and Body Composition Changes." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2552.
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The effect of the dietary macronutrient composition on weight loss has been a controversial issue for decades. During that time, a high-protein, high-fat, and low-carbohydrate diet has been one of the more popular weight loss diets with the public. We hypothesized that a computer simulation model using STELLA software could help to better understanding the effect of the dietary macronutrient composition on weight loss. We calculated daily total oxidation instead of total energy expenditure as others have done based on the facts that carbohydrate, fat, and protein intake influence carbohydrate, fat, and protein oxidation. In order to create a simple and accurate model comparing dietary macronutrient composition effects, we eliminated exercise as a factor and focused on a sedentary population. The model was validated by five sets of published human data. Following model validation, simulations were carried out to compare the traditional high-carbohydrate diet recommended by the American Dietetic Association and two well-known high-protein diets (Atkins and the Zone diet). The results of computer simulation suggested that the lean tissue retention effect of a high-protein diet, especially with a lower-fat diet, compared with a traditional high carbohydrate diet over 6 months.
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Kumar, Janavi. "Identifying barriers to healthy eating and physical activity in a low-income community in south-western Kansas." Thesis, Kansas State University, 2013. http://hdl.handle.net/2097/16988.
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Master of ScienceDepartment of Human Nutrition
Koushik Adhikari
Obesity in adolescence is associated with a complex web of ecological, psychosocial, and physiological factors, and many of these factors relate to nutrition and physical activity behaviors. Before interventions are developed, researchers need to know what factors specifically influence an adolescent’s food choices and physical activity within the community context. Cultural norms, school environment, and neighborhood attributes are examples of factors that may vary across different communities, and accounting for this variation can be quite challenging, unless community perspectives are acknowledged. The use of qualitative data from focus groups has shown to be an effective way of gathering community perspectives about the diversity of their views and experiences. The current study used focus groups to reveal facilitators and barriers to healthy eating behavior and physical activity engagement in 6th to 8th grade youth in a low-income community in South-Western Kansas. This methodology enabled community members (adolescents, parents, and teachers) to discuss and articulate their perceptions in relation to 6th to 8th grade youth’s eating habits and physical activity, and assessed available resources, needs, and opportunities for developing effective and sustainable intervention approaches in the community. Using the socio-ecological model, individual influences (e.g., taste preferences), social influences (e.g., parent and peer influences), and larger contextual influences (e.g., school) on early adolescent health were assessed. This information will be used to develop interventions addressing factors at these different levels of influence that are needed to improve eating habits and physical activity of youth in the community.
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Stanford, Jevetta. "Ecological Influences on Weight Status in Urban African-American Adolescent Females: A Structural Equation Analysis." UNF Digital Commons, 2012. http://digitalcommons.unf.edu/etd/356.
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The present study employed a quantitative, non-experimental, multivariate correlational research design to test a hypothesized model examining associative paths of influence between ecological factors and weight status of urban, African-American adolescent females. Anthropometric and self-report survey data of 182 urban, African- American adolescent females were collected during after-school programs, health and physical education classes, and community events in an urban area in northeast Florida. Descriptive analyses were conducted to characterize the study participants based upon their age, study setting, and weight status. A scale reliability analysis was conducted to assess the internal consistency reliability of the sample data using selected measures within the context of the study’s specific population and subsequently guided the structural equation model (SEM) analyses. The SEM path analysis was used to develop two measurement models to control for observed error variance for variables demonstrating poor internal consistency reliability (diet behaviors and nutrition selfefficacy) and a final structural model to test the associative paths of influence between latent (diet behaviors and nutrition self-efficacy) and manifest variables (teacher social support and friend social support) on weight status. The results of the path analysis indicated that both teacher social support and friend social support demonstrated a positive, indirect influence on child weight status through nutrition self-efficacy and diet behaviors following two different and specific paths of influence. Diet behaviors, in turn, demonstrated a positive, direct effect on child weight status. These findings provide clear implications for educational leaders that call for the integration of health behavior change theory into traditional education and leadership practice and actively addressing the childhood obesity epidemic in the school environment by implementing health behavior change strategies at various ecological environmental levels.
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Vigo-Valentin, Alexander. "The Food Behavior Considerations, Physical Activity Behavior Patterns, and Body Composition Indices of Adolescents in Puerto Rico." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1219429985.
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Knox-Kazimierczuk, Francoise Alihsa. "African American Women and Obesity: Examining the Intersections of Race and Class." Miami University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1437548368.
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Liu, Sherry T. "Behavioral, Policy, and Environmental Approaches to Obesity Prevention in Preschool-Aged Children." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1395108013.
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Hakopian, Ani. "Food habits and environmental awareness among adolescents in Västerås : A study of neighborhoods with different socioeconomic status based on the NESLA study." Thesis, Mälardalens högskola, Akademin för hälsa, vård och välfärd, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-39916.
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Människor med hög socioekonomisk status har bättre matvanor och är mer miljömedvetna jämfört med de individer med låg socioekonomisk status, vilket bland annat beror på högre utbildningsnivå och inkomst. För att etablera goda matvanor krävs att det finns goda förutsättningar, till exempel är tillgången till mataffärer med ett stort utbud av färskvaror associerat med hälsosamma matvanor och frånvaron av bra mataffärer påverkar framför allt utsatta grupper i samhället. Syftet med den här studien är att beskriva matvanor och miljömedvetenheten bland ungdomar och undersöka om det finns skillnader i matvanor, miljömedvetenhet och förutsättningar för goda matvanor mellan ungdomar som bor i stadsdelar med olika socioekonomisk status i Västerås. Studien har en kvantitativ ansats med en tvärsnittsdesign. Sekundära data har använts från studien Neighborhood, sustainable lifestyle and health among adolescents (NESLA), som genomfördes år 2017 på ungdomar från andra och tredje året på gymnasiet. Resultatet visar att ungdomar konsumerar frukt och grönsaker för sällan och konsumerar läsk, godis och chips för ofta. Majoriteten av ungdomarna äter på en snabbmatsrestaurang minst en gång i veckan. Nästan hälften av ungdomarna äter frukost varje dag och majoriteten av ungdomarna äter lunch i skolan varje dag. De flesta ungdomar är miljömedvetna, då majoriteten är oroliga för miljö- och klimatförändringar och tror att det är möjligt att påverka miljön genom egna livsstilsval. Det finns en signifikant korrelation mellan hög miljömedvetenhet och ohälsosamma matvanor. Det finns inga signifikanta skillnader mellan ungdomar från stadsdelar med olika socioekonomisk status och matvanor. Det finns inte heller någon skillnad mellan ungdomar från olika stadsdelar och huruvida de är oroliga för miljöförändringar, men för huruvida ungdomarna tror att de kan påverka miljön genom livsstilen. Ungdomar som bor i stadsdelar med låg socioekonomisk status rapporterar att de har bättre förutsättningar för hälsosamma matvanor jämfört med ungdomar från stadsdelar med medelhög och hög socioekonomiska status. För att diskutera resultatet har den ekologiska modellen använts som teoretiskt perspektiv.Individuals with high socioeconomic status have better food habits and are more environmentally aware, due to higher education level and income. To establish healthy food habits, it requires that there are good prerequisites such as food stores with a wide range of fresh food since it is associated with healthy food habits of an individual and absence of good food stores is mainly affecting disadvantaged groups. The aim of this study is to describe food habits and environmental awareness among adolescents in Västerås and investigate if there are differences regarding food habits, environmental awareness and prerequisites for healthy food habits between adolescents living in neighborhoods with different socioeconomic status. The study is a quantitative study with a cross-sectional study design. Secondary data was used from the study Neighborhood, sustainable lifestyle and health among adolescents (NESLA), which was conducted in autumn of 2017 on adolescents from year two and three in high school. The result shows that the adolescents’ have a low consumption of fruits and vegetables and a high consumption of candy, chips, other snacks and soda. The majority of the adolescents’ eats at a fast food restaurant at least once a week. Almost half of the adolescents’ eats breakfast every day and the majority eats lunch at school every day a regular week. Most of the adolescents are environmentally aware, since they are worried about environmental issues and climate changes and believe that their lifestyle choices can affect the environment. A significant correlation between high environmental awareness and unhealthy food habits is found. There is no statistically significant difference between neighborhood-level socioeconomic status and food habits, and for being worried about environmental issues and climate changes. Significant differences are found between adolescents from neighborhoods with different socioeconomic status and believing in that lifestyle choices affects the environment. Adolescents living in low socioeconomic status neighborhoods reported that they have greater prerequisites for healthy food habits compared to middle-high and high socioeconomic status neighborhoods. The ecological model was used as a theoretical perspective to discuss the results.
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Heijden, Luuk van der. "Determination of the food sources and of the role of meiofauna in soft-bottom intertidal habitats of the Marennes-Oléron Bay, France, and the Sylt-Rømø Bight, Germany : importance of the microphytobenthos-meiofauna pathway, highlighted by community structure, trophic markers and linear inverse food web models." Thesis, La Rochelle, 2018. http://www.theses.fr/2018LAROS030/document.
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La méiofaune joue un rôle important dans le fonctionnement des habitats benthiques à substrat meuble (ex. flux de matière) en relation avec sa production élevée, sa position trophique intermédiaire et les importants transferts d’énergie vers les niveaux trophiques supérieurs qui y sont lié. Les relations trophiques et les flux de matière organique liés à la méiofaune restent néanmoins mal connus ou peu pris en compte. Afin de mieux appréhender le rôle de la méiofaune, la structure des communautés et les relations trophiques entre les sources de nourriture et ces consommateurs ont été déterminées dans cinq habitats à substrat meuble (i.e., vasière nue, herbier, zone à sables) de la baie de Marennes-Oléron, France, et de la baie de Sylt-Rømø, Allemagne, en tenant compte des variations temporelles. Le peuplement de méiofaune s’est trouvé être dominé par les nématodes et les copépodes benthiques. Les biomasses de microphytobenthos et de matière organique du sédiment sont apparues comme étant deux facteurs structurants pour les communautés. L’utilisation combinée de différents traceurs de la matière (i.e., isotopes stables, acides gras) a démontré que le microphytobenthos et les bactéries étaient les ressources trophiques majeures de la méiofaune dans les cinq habitats étudiés. Les mesures réalisées sur la structure des communautés et les données issues des traceurs de la matière ont été implémentées dans des modèles de réseaux trophiques. Dans tous les habitats, ces modèles ont mis en évidence que le flux de carbone dominant était issu du microphytobenthos, ceci démontrant les très faibles changements de comportements alimentaires malgré les importantes différences de sources trophiques en termes de disponibilité et de production des sources de nourriture entre ces différents habitats. Tous les groupes trophiques de nématodes, à l’exception des déposivores sélectifs, étaient particulièrement sélectifs et s’alimentaient majoritairement à partir de microphytobenthos, ceci étant à l’origine d’une forte production et d’un court temps de renouvellement de la méiofaune. En conclusion, cette thèse démontre le rôle important de la méiofaune dans les habitats à substrat meuble ainsi que l’importance de la relation trophique entre le microphytobenthos et la méiofaune dans le fonctionnement de ces réseaux trophiquesMeiofauna play an important role in ecosystem processes in soft-bottom benthic habitats, e.g. food web dynamics, related to their highproduction, their intermediate trophic position and the energy they transfer towards higher trophic levels. The trophic linkages and flows of organic matter related to the meiofauna remain poorly known or taken into account. To better assess the role of meiofauna, the community structure and trophic relationships between food sources and meiofauna were determined in five intertidal soft-bottom habitats (i.e., mudflat, seagrass bed, sandflat) of the Marennes-Oléron Bay, France, and the Sylt-Rømø Bight, Germany, taking temporal variations into account. Meiofauna communities were dominated by nematodes and benthic copepods. Biomass of microphytobenthos and of sediment organic matter were two of the major drivers of community structure. The combination of trophic markers (i.e., stable isotopes, fatty acids) demonstrated that microphytobenthos and bacteria were the major food sources of meiofauna in the five habitats. Information from community structure assessments and trophic marker analyses were implemented in food web models. In all habitats, these models demonstrated that the main flow of carbon to meiofauna originated from microphytobenthos, highlighting negligible changes in meiofauna feeding behavior besides the large differences in availability and productivity of food sources between these habitats. All trophic groups of nematodes, except for selective deposit feeding nematodes, were highly selective and mainly fed on microphytobenthos, resulting in a high production and a short turn-over time of meiofauna. In conclusion, this thesis demonstrated the important role of meiofauna in soft-bottom habitats as well as the importance of the trophic pathway from microphytobenthos to meiofauna in the functioning of these food webs
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Lindgren, Sophie, and Amanda Tuvhag. "Corporate Social Responsibility : The future of business or just a beautiful surface?" Thesis, Linnéuniversitetet, Ekonomihögskolan, ELNU, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-19837.
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Master Thesis in Marketing,SchoolofBusinessandEconomicsat Linnaeus University, spring 2012 Authors: Sophie Lindgren and Amanda Tuvhag Title: Corporate Social Responsibility – A successful business strategy or just a trend? Purpose: First of all, this thesis wants to describe managers’ expectations regarding customers’ perception about their retail stores CSR initiatives and furthermore their implemented CSR initiatives. Secondly, to describe customer awareness and engagement towards retail stores CSR initiatives. Finally, to compare the results from retail store and customers, in purpose to identify possible gaps between these two. Research questions:RQ1: What expectations regarding customers’ perception of retail stores CSR initiatives do manager of such stores have and how do they perform CSR activities? RQ2: How aware are customer regarding retail stores CSR initiative and what level of engagement do customer have concerning retail stores CSR activities? Method: The empirical material is based on both a quantitative and a qualitative investigation. The quantitative investigation is the main study and contains of a customer survey whereby the collected sample consist of 150 respondents. A pilot study have been conducted in order to improve the intension of the survey. Further, the qualitative investigation contains five in-depth semi-strucutred interviews with local store managers of the selected retail stores. Conclusion: Customer thinks retail stores CSR initiatives are important, but they seldom support them. Retail store expect customers to value CSR products/action low in relation to other factors, but retail store are engaging themselves in several CSR actions. Keywords: Corporate Social Responsibility (CSR), marketing strategy, business ethics, sustainability, reputation, food industry, retailers, gap-model, perception, customer, retail store industry, expectation, environmentally certified, ecological products, fair trade.
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Cao, Yan, Katie L. Callahan, Sreenivas P. Veeranki, Yang Chen, Ying Liu, and Shimin Zheng. "Vitamin D Status and Demographic and Lifestyle Determinants Among Adults in the United States (NHANES 2001-2006)." Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etsu-works/130.
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This study looked at risk factors associated with vitamin D levels in the body among a representative sample of adults in the U.S., NHANES III (2001-2006) data were used to assess the relationship between several demographic and health risk factors and vitamin D levels in the body. The Baseline-Category Logit Model was used to test the association between vitamin D level and the potential risk factors age, education, ethnicity, poverty status, physical activity, smoking, alcohol, obesity, diabetes and total cholesterol with both genders. Vitamin D insufficiency and deficiency were significantly associated with age, race, education, physical activity, obesity, diabetes and total cholesterol level for both genders. Almost half of the adults sampled in these data had vitamin D levels lower than the recommended limits, with the highest frequency among the younger groups. Determining an individual’s vitamin D level is very difficult without proper clinical testing. Many of those who have low vitamin D levels are unaware. With such a high prevalence of individuals with low vitamin D levels in the U.S. and a better understanding of characteristics associated with these lower levels, increased education and prevention efforts should be focused toward those with higher risk characteristics.
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Augusto, Rosângela Aparecida. "Avaliação da efetividade de programa governamental de distribuição de leite fortificado no crescimento de crianças de 6 a 24 meses de famílias de baixa renda, residentes no interior do Estado de São Paulo." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/89/89131/tde-23112009-145933/.
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Introdução: A avaliação dos resultados de políticas públicas de suplementação alimentar em condições reais de sua operacionalização (efetividade) é um instrumento imprescindível para área de saúde pública. Objetivos: Avaliar a efetividade de programa governamental de suplementação alimentar no crescimento de crianças, segundo o estado nutricional ao ingressar. Métodos: Estudo de coorte com dados secundários de 25.433 crianças de baixa renda com idade entre 6 a 24 meses que ingressaram em programa de distribuição de leite fortificado \"Projeto Vivaleite\" de 2003 a 2008, em 311 municípios do Estado de São Paulo. O crescimento foi medido por meio dos valores de escore z de peso para idade (PI), calculados pelo padrão OMS/2006, obtidos, na rotina do programa, ao ingressar e a cada 4 meses durante a permanência. Os critérios de inclusão foram ter idade ao ingressar entre 6 a 24 meses, ter pelo menos duas pesagens, incluindo a obtida na entrada, e não ter relatos de problemas de saúde. As crianças foram divididas em três grupos de escore z ao entrar: sem comprometimento de peso (z> -1); risco de baixo peso (-2 ≤z< -1) e baixo peso (z<-2). Utilizou-se regressão linear multinível (modelo misto), permitindo a comparação, em cada idade, das médias ajustadas do escore z de ingressantes e participantes há pelo menos quatro meses, ajustadas para correlação entre medidas repetidas. Resultados: Verificou-se efeito positivo do Programa no ganho de peso das crianças, variando em função do estado nutricional ao ingressar; para as que entraram sem comprometimento de peso o ganho médio ajustado foi 0,1827 escore z, entre as que entraram com risco de baixo peso foi 0,5659 e entre as ingressantes com baixo peso foi 1,0049 escore z. Conclusões: O programa é efetivo para o crescimento infantil, medido pelo escore z PI, com efeito mais pronunciado entre as crianças que entram no programa em condições menos favoráveis de peso.OBJECTIVE: To assess the effectiveness of a state-run food supplementation program for child growth according to childrens nutritional status at enrollment. METHODS: Cohort study including secondary data of 25,433 low-income children aged between 6 and 24 months enrolled in a fortified milk program \"Projeto Vivaleite\" in 311 cities in the State of São Paulo, Brazil, between 2003 and 2008. Children\'s growth was assessed based on weight-for-age (WA) z-scores, estimated following WHO criteria (2006). Data was routinely collected at the program enrollment and every 4 months. Inclusion criteria were: being 6 to 24 months of age at enrollment; having at least two weight measures including the first measure at enrollment; and not having any ill health conditions. At enrollment, children were categorized into three groups based on their z-scores: no compromised weight gain (z> 1); at risk of low weight (-2 ≤z< -1), and low weight (z< -2). Multilevel linear regression analysis (mixed model) was performed for comparison, considering age, of adjusted average z-scores between new children enrolled and those in the program for at least four months, adjusted for correlation between repeat measures. RESULTS: The program had a positive effect on children\'s weight gain. Based on their nutritional status at enrollment, adjusted average weight gain z-score was 0,1827 in children with compromised weight gain, 0,5659 in those at risk of low weight, and 1,0049 in those with low weight. CONCLUSIONS: The milk program is effective for child growth, as measured by WA z-scores. The most pronounced effect was seen among children who showed less favorable levels of weight at enrollment.
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Spilmont, Mélanie. "Intérêt de la grenade dans la prévention nutritionnelle de l'ostéoporose : rôle des fractions lipidiques et polyphénoliques, approches physiologiques, cellulaires et moléculaires." Thesis, Clermont-Ferrand 1, 2013. http://www.theses.fr/2013CLF1MM05/document.
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Dans le contexte actuel d'allongement de l'espérance de vie, la prévalence et le coût de prise en charge des maladies liées à l'âge telles que l'ostéoporose sont de plus en plus importants. Dans le cadre du développement de nouvelles stratégies de prise en charge des pathologies osseuses, la nutrition offre un potentiel évident et représente une excellente solution alternative aux traitements habituels. Bien que trop marginales, les études des activités biologiques de certains aliments ont pourtant d'ores et déjà montré des effets protecteurs sur l'acquisition du capital osseux et sa préservation par le biais de leurs propriétés anti-inflammatoires et antioxydantes. A ce titre, la consommation de grenade est envisagée car elle fait actuellement l'objet d'intérêts scientifiques croissants ayant déjà suggéré ses avantages nutritionnels et pharmacologiques pour la prévention de certaines pathologies chroniques associées au vieillissement. Dans le cadre du projet de thèse, les premiers travaux réalisés, focalisés donc sur la grenade, ont permis de dégager le concept selon lequel les propriétés biologiques de ce fruitexceptionnel seraient expliquées par la composition particulière de ses différentes parties : en polyphénols pour le jus (anthocyanines) et la peau (ellagitannins) et en acide punicique pour les pépins, et surtout au potentiel anti-oxydant et anti-inflammatoire de ces molécules. Cette hypothèse a donné lieu à une première étude à vocation phytochimique qui a permis de déterminer, de standardiser, produire et caractériser deux types d'extraits de grenade titrés en molécules d'intérêt (acide punicique et ellagitannins). Nous avons ensuite étudié l'impact de la consommation du fruit (donné dans sa totalité) ou de ses principales parties (jus et peau) ou encore d'extraits concentrés en ellagitannins et en acide punicique, sur la biologie osseuse, dans un modèle expérimental d'ostéoporose post-ménopausique bien décrit (ostéopénie consécutive à une carence oestrogénique induite par ovariectomie chez des souris C57bl6/j). Cette étude préclinique a permis de montrer que tous les régimessupplémentés en grenade (quelle que soit la partie) permettent de limiter les processus de déminéralisation et l'altération micro-architecturale de l'os, s'expliquant par une réduction des marqueurs de résorption osseuse et une amélioration de ceux de la formation ; et une diminution des paramètres inflammatoires, et oxydants. Ensuite, afin de déterminer les structures médiatrices de ces effets, une approche originale ex-vivo a permis d'étudier plus finement les mécanismes cellulaires ostéoblastiques et ostéoclastiques associés à la consommation des extraits de grenade testés. Cette analyse a été développée de façon à tenir compte du métabolisme particulier de ces micronutriments et donc des modifications systémiques engendrées suite à l'ingestion des extraits. Ce travail a permis de mettre en évidence que les effets observés in-vivo sur l'os,pouvaient être expliqués par une action directe aussi bien sur les ostéoblastes que sur les ostéoclastes, et donc une optimisation du remodelage osseux. De fait, la consommation d'ellagitannins et d'acide punicique augmente l'activité des ostéoblastes (activité alcaline phosphatase et formation de nodules de calcium) et l'expression des principaux acteurs et facteurs de transcription impliqués dans leur différenciation, tout en diminuant l'expression de ceux responsables de la différenciation ostéoclastique. Dans le même temps, l'analyse des transcrits met en évidence que les extraits de grenade favorisent l'activation d'acteurs impliqués dans les mécanismes de défenses contre le stress oxydant et l'inflammation, au niveau du microenvironnement osseux. Ces résultats révèlent pour la première fois le potentiel de la grenade au regard de la physiologie osseuse en proposant ses possibles mécanismes d'actions, via une approche nutritionnelle complète et intégrée respectant la physiologieIn the current context of increased life expectancy, prevalence and socioeconomic consequences of age-related diseases such as osteoporosis represent a major public health problem worldwide. This is why development of new strategies of prevention is highly suitable to provide a wide array of options (alternatives to usual therapies) for health professionals. So far, studies targeting nutrient biological activities have been mainly focused on both calcium and vitamin D. Nevertheless, other nutrients have shown a protective effect on bone mass acquisition and preservation through their anti-inflammatory and antioxidant properties. In this light, pomegranate is endowed with such a potential. Indeed there is an increasing scientific interest that has already suggested its nutritional and pharmacological benefits on prevention of some chronic age-associated diseases. As part of this project, the initial work focused on pomegranate has highlighted the link between its health benefit potential and the exceptional composition of its main parts: polyphenols from the juice (anthocyanins) and the peel (ellagitannins) and punicic acid from seed, those micronutrients being able to elicit antioxidant and anti-inflammatory capacities. Our work hypothesis resulted from a first phytochemical study leading to identify, standardize, characterize and produce two types of pomegranate extracts titrated on 2 molecules of interest (punicic acid and ellagitannins). We thus investigated the outcome of consumption, first of the whole fruit or its principal parts (peel and juice) and in a second time of concentrated ellagitannins and punicic acid extracts on bone biology in a well described experimental model of postmenopausal osteoporosis (osteopenia induced by estrogen deficiency after ovariectomy in C57bl6/j mice). In this preclinical study, wedemonstrated that all the diets supplemented with pomegranate significantly prevented bone loss and micro-architecture impairment. Those findings are associated with transcriptional changes in bone tissue, suggesting involvement of both osteoclastogenesis inhibition and osteoblastogenesis improvement, and reduced inflammatory and oxidative parameters, as well. Then, to determine more accurately the molecules and the signaling pathways involved in those effects, an original ex-vivo study was set up on both osteoblasts and osteoclasts, with respect to physiological conditions (i.e., the aim being to mimic systemic changes and generation of specific circulating metabolites associated with the extractsingestion). This work allowed clarifying the bone sparing effects observed in-vivo. Indeed, pomegranate extracts had the ability to elicit a significant increase in alkaline phosphatase activity, matrix mineralization and transcriptional levels of major osteoblast lineage markersinvolving key signaling pathways, while the expression of specific osteoclast differentiation markers and RANK-RANKL downstream signaling targets were down-regulated. In addition, transcripts analysis revealed that pomegranate extracts were able to induce defense mechanisms against oxidative stress and inflammation in the bone microenvironment. Our results show for the first time the pomegranate potential regarding bone physiology, underlying its possible mechanisms on bone remodeling through a complete and integrated nutritional approach respecting the physiology
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Baptista, Vicente Baeta Alexandra. "Réseaux trophiques des écosystèmes intertidaux : étude par les isotopes stables et l'analyse des réseaux." Phd thesis, Université de La Rochelle, 2010. http://tel.archives-ouvertes.fr/tel-00579775.
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Cette thèse de Doctorat examine le réseau trophique estuarien lié aux herbiers à zostères, Zostera noltii et quantifie le rôle trophique des consommateurs de la macrofaune benthique, dans deux zones intertidales de l'estuaire du Mondego, à différentes périodes de 1993 à 2008. Elle s'intéresse spécifiquement (i) à l'incorporation de l'azote issu des activités humaines, en considérant l'assimilation d'azote comme un indicateur de l'eutrophication et (ii) au rôle des zostères dans le réseau trophique benthique. Six modèles ont été développés afin d'analyser les effets, (i) d'un enrichissement en nutriments, (ii) des mesures de mitigation, et (iii) d'une inondation centennale, sur les propriétés du réseau trophique benthique estuarien. La présence de Z. noltii change peu la structure du réseau trophique planctonique, soutenu en partie par la matière organique particulaire et supporte principalement des poissons comme prédateurs. Les autres consommateurs montrent une grande variabilité de signature isotopique, ce qui suggère qu'ils peuvent changer de régime alimentaire en fonction des changements de l'environnement. En revanche, les δ13C et δ15N des producteurs et consommateurs de l'estuaire du Mondego montrent très peu de variation saisonnière, malgré une saisonnalité météorologique marquée, ainsi qu'une forte variation saisonnière des paramètres de la colonne d'eau (apports en sels nutritifs et concentration en chlorophylle a). Les modèles à l'état stable montrent enfin que la structure trophique de la communauté benthique de l'estuaire du Mondego est affectée différemment par chacun des évènements particuliers étudiés.
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Boisard, Lauriane. "Relations entre mobilité du sodium, libération du sel et des composés d'arôme en bouche et perception de la flaveur : application à des modèles fromagers." Phd thesis, Université de Bourgogne, 2012. http://tel.archives-ouvertes.fr/tel-00877715.
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L'objectif de ce travail est de comprendre les effets d'un changement de composition des modèles fromagers sur la mobilité, la libération et la perception de molécules de la flaveur (sel, composés d'arôme). Six modèles fromagers aromatisés ont été formulés (3 ratios lipides/protéines (L/P) et 2 teneurs en sel). La microstructure et les propriétés rhéologiques des modèles fromagers ont été caractérisées respectivement par microscopie confocale et par compression uniaxiale. La mobilité des ions sodium a été analysée par RMN 23Na. La cinétique de libération des ions sodium a été suivie dans l'eau, puis dans la salive, en situation de consommation. La libération rétronasale des composés d'arôme a été suivie par nose-space APCI-MS, simultanément au suivi des déglutitions, et de la mastication par électromyographie. Enfin, les propriétés sensorielles des modèles fromagers (intensité salée, arôme, texture) ont été étudiées.Une diminution du ratio L/P et une diminution de la teneur en sel diminuent la taille des gouttelettes lipidiques et augmentent la fermeté. Cela conduit à une diminution de la mobilité des ions sodium, qui se traduit par une diminution de la quantité de sodium libéré dans la salive et une diminution de la perception salée. De plus, le maximum de libération d'arôme est atteint plus tard et la perception aromatique est diminuée. Ces effets peuvent être expliqués par la répartition lipides/protéines observée en microscopie, par une déglutition plus tardive et une plus grande activité masticatoire
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"The Associations Among Emotions and Food Choices in College Freshmen: A Cross-Sectional Study Using Ecological Momentary Assessment." Master's thesis, 2016. http://hdl.handle.net/2286/R.I.38394.
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abstract: While literature has examined the associations between emotions and overeating, rarely is the relationship between emotions and food choices included. The purpose of this secondary data analysis was to utilize mobile-based ecological momentary assessment (EMA) surveys to determine the associations among negative, positive, apathetic, and mixed emotions and a variety of food choices in college freshmen living in residence halls. A total of 2142 survey responses from 647 college freshmen were included in this analysis (70.3% female, 51.5% non-white). Mixed model logistic regression assessed the cross-sectional association between emotions and food choices adjusting for gender, race/ethnicity, Pell grant status, highest parental education, and the clustering of repeated measures within person and of students within residence hall. There were no significant associations between negative emotions and food choices. Positive emotions were significantly and inversely associated with eating pizza/fast food (OR=0.6; 95% CI=0.5, 0.8) and cereals (OR=0.6; 95% CI=0.4, 1.0), while apathetic emotions were significantly and positively associated with consuming salty snacks/fried foods (OR=1.6; 95% CI=1.1, 2.5) and inversely associated with consuming sandwiches/wraps (OR=0.5; 95% CI=0.3, 0.8) and meats/proteins (OR=0.6; 95% CI=0.4, 1.0). It was also found that there were several instances of surveys with mixed emotions, in which participants reported feeling two conflicting emotions at once (i.e. positive and negative). Mixed emotions were significantly associated with consuming sweets (OR=1.6; 95% CI=1.2, 2.1), meats/proteins (OR=1.6; 95% CI=1.2, 2.0), and cereals (OR=1.9; 95% CI=1.2, 2.9). Understanding the relationships between different types of emotions and food choices is helpful in understanding the motivation behind healthy versus unhealthy food choices. These findings can be used to develop interventions that encourage positive emotions in college freshmen to better promote healthy food choices and ultimately reduce the risk of weight gain and other health disparities. Future research should examine how college freshmen differ from other college students (i.e. upper classmen and graduate students), particularly related to their emotions and food choices, so that dietary interventions can be better suited to those who are vulnerable.Dissertation/Thesis
Masters Thesis Nutrition 2016