To see the other types of publications on this topic, follow the link: Packaging of cereal products.
Dissertations / Theses on the topic 'Packaging of cereal products'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Packaging of cereal products.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Pàmies, Baltasar Vallès. "Hydration-induced textural changes in cereal products." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250579.
Full text
2
Moreau, Lydie. "Impact of sodium chloride on breakfast cereal products." Thesis, University of Nottingham, 2009. http://eprints.nottingham.ac.uk/28601/.
Full textAbstract:
To reduce the amount of sodium chloride in breakfast cereals without changing their properties, it is necessary to understand the role of this salt. Hence, a model system was developed. This model, composed of native waxy maize starch, glucose and a mixture of amino-acids generated similar colour and residual volatiles after heating compared to commercial breakfast cereals. Systematically designed experiments used this model to study the influence of NaCl concentration (0 % to 5.44 %) on colour, residual volatiles and acrylamide formation. It was found that higher NaCl concentration led to darker products (p<0.05) and significantly decreased acrylamide formation in the model systems. However, it did not have a significant impact on residual volatile levels. These findings were confirmed by observations made on wheat, wheat and rice mixture, com and rice commercial cereals. The impact of NaCl on colour and acrylamide formation indicated that this salt might influence Maillard and/or caramelisation rates and pathways. As NaCl is a plasticiser, it can allow the rubbery state to be maintained for a longer period during heating, improving reactants' mobility and Maillard reactions. However, it was found using the model systems mixed with several types of plasticisers (NaCl, KCl or trehalose), that the NaCl plasticising effect was not the major influence. The models also demonstrated that the hygroscopic behaviour of NaCl was not linked to its impact on colour and acrylamide formation. In investigating salt's influence on starch, native waxy maize, cassava or potato starch were mixed with NaCl (0 to 4 %; moisture adjusted to 20 %) and were heated at 230°C for 45 min. Microscopic observations, wide angle X-ray, viscosity, intrinsic viscosity and DSC data all suggested that starch was degraded by the heat treatment, and NaCl accelerated starch break down into smaller molecules, i.e. glucose. The glucose potentially formed could then caramelise, which might explain the NaCl impact on colour formation in model systems and breakfast cereals. Among other tested salts, CaCl[subscript]2 and MgC1[subscript]2 also enhanced starch degradation during a heat treatment. In studying glucose solutions containing salt (NaCl, CaCl[subscript]2 or MgCl[subscript]2) and heated between 180 and 230 °C, it was observed that salt enhanced colour formation via caramelisation (p<0.05). Mixtures of glucose, amino-acids and salt (NaCl, CaCl[susbscript] or MgCl[subscript]2), heated under the same conditions, showed that salt significantly decreased colour formation (p<0.05), which was most likely generated via Maillard reactions. Hence, salts could slow down Maillard reactions, explaining why lower acrylamide contents were found in model systems and cereal products when NaCl was present. As NaCl seems to influence Maillard and caramelisation reactions, decreasing or removing NaCl from breakfast cereal recipes might not only alter the salty taste but also the overall flavour. CaCl[subscript]2 and MgCl[subscript]2 seemed to have similar or even more impact on colour formation compared to NaCl. Adding these salts to breakfast cereal products with a low NaCl content was found to compensate for the colour loss. Adding CaCl[subscript]2 or MgCl[subscript]2 also improved the overall flavour of breakfast cereals, even though it did not compensate entirely for the taste loss.
3
Mazibuko, Aaron Lekatjo. "Brand loyalty of cereal products / Aaron Lekatjo Mazibuko." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4427.
Full textAbstract:
The South African breakfast market consists of several brand products for cereal products, and some of the products are produced locally while others are imported. Cereal products are classified under fast moving consumer goods (FMCG). The majority of the cereal products are easy to serve. The following brands are common in South Africa and have been listed according to their popularity with
consumers: Kellogg's Corn Flakes, Kellog's Special K, Jungle Oats, Cheerios and Weet Bix.
Kellogg's Corn Flakes are made from maize (corn) and provides guidelines daily amounts (GDA) for
each of the nutrients.
Branding may consist of building an emotional response or cultural response. As consumers are
bombarded with a variety of products to meet the same needs, branding provides a way for
consumers to reduce their decision-making to consider only those products that they feel are relevant to them or that have met their needs acceptably in the past. If brand loyalty were a random event, there would be no purpose in making it the object of applied scientific enquiry. Verbal reports are insufficient for defining brand loyalty. Such loyalty requires that statements of bias be accompanied by
biased purchasing behaviour.
The study was conducted to determine factors that influence the consumers to constantly use a
particular brand, and prefer it above other cereal products. A literature and empirical study form part of this study. Questionnaires were used as a measuring instrument to determine which factors the consumer considers important in choosing a particular cereal product. Data analysis was done by means of a factor analysis.
A brand loyalty framework developed by Moola was used in classifying the brand loyalty influences.
To a large extent the research concluded that brand loyalty in the cereal market is similar to that found in bread, coffee and toothpaste (as per mentioned model). However, some differences with regard to the brand loyalty influences have been found. This study did not determine if these differences are related to cereal as FMCG, or the specific consumer market that was analysed.Thesis (M.B.A.)--North-West University, Potchefstroom Campus, 2011.
4
Granfeldt, Yvonne. "Food factors affecting metabolic responses to cereal products." Lund : Dept. of Applied Nutrition and Food Chemistry, Lund University, 1994. http://catalog.hathitrust.org/api/volumes/oclc/39774219.html.
Full text
5
Davis, M. "Whole crop cereal harvesting, utilisation of products and by-products by ruminants." Thesis, University of Aberdeen, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.483198.
Full textAbstract:
Work with sheep indicated that fractionation of whole crop barley (WCB) further than material other than grain (MOG) and grain was of no benefit. Feeding WCB to sheep demonstrated the effectiveness of NaOH (53g/kg DM), aqueous NH3 and anhydrous NH3 (both 42g/kg DM) as treatment chemicals for mature (800g DM /kg) WCB, OMD being increased by around 5 percentage units for all three treatments. A laboratory scale trial indicated that aerobic stability of WCB was improved by NH3 treatment, the optimum level being 30 to 40g /kg DM. In the work which followed WCB of between 350 and 800g DM /kg was treated with anhydrous ammonia at a level of 35g /kg DM and fed to steers of 350 kg liveweight. In cattle of this weight faecal grain loss was significantly correlated with dry matter intake (g /kg0.75 LW). Ammonia treatment increased intake by 25% while grain loss increased from a mean of 0.177 of ingested grain for diets of 670 and 770g DM /kg to 0.284 after NH3 treatment. Rate and extent of DM loss from whole grains incubated in the rumen were increased by NH3 treatment of the WCB. Distribution of anhydrous NH3 in crops < 600g DM was uneven. The final trial used steers of liveweight 150, 250 and 350 kg to test the hypothesis that smaller cattle digest whole grain more fully than do large cattle. The influence of animal size on starch digestibility coefficient was found to be significant when a multiple regression analysis was performed on the data. However faecal grain loss was still high (digestibility coefficient of starch < 0.85) for all diets and animal categories. Urea effectively preserved WCB of 675g DM /kg, the resulting material being readily consumed. It is concluded that WCB harvesting with subsequent chemical treatment, and feeding to cattle cannot be justified because of the high faecal grain loss which occurs at productive levels of intake, but the possibility does exist for inclusion in complete diets for sheep.
6
Bagdan, Galen Corey. "Shelf-life extension studies on an omega-3 enriched breakfast cereal." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0033/MQ64315.pdf.
Full text
7
Visser, Sophia Dorathea. "Child consumers' perception of colour and graphics in cereal box packaging design / S.D. Visser." Thesis, North-West University, 2006. http://hdl.handle.net/10394/1338.
Full text
8
Campbell, Janet. "The mechanical and hydration properties of cereal wafer products in the glassy state." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281693.
Full text
9
Abeyratne, Meliza Stephnie. "Growth of Fusarium Graminearum on Wheat Bran/Agar Cultures in Relation to Fusarium Head Blight Susceptibility." Thesis, North Dakota State University, 2012. https://hdl.handle.net/10365/26499.
Full textAbstract:
Research investigates the chemical basis for Fusarium head blight (FHB) resistance and initiating development of a screening test for resistant wheat genotypes. The focus is on minimizing cost of screening and gaining chemical approach against FHB. Wheat bran/agar plates (8% bran, w/v) prepared from hard red spring wheat with different susceptibility to FHB were inoculated with F. graminearum. Fusarium plaque diameters and ergosterol levels after 4 days of growth were significantly lower (p< 0.05) on plates prepared from genotypes with low FHB susceptibility than from high FHB susceptible genotypes. F. graminearum growth was lower, when methanol-soluble compounds (MSC) extracted from a low FHB susceptibility genotype, Glenn, were added to high susceptibility genotype, Samson. Wheat bran/agar plates enriched with linoleic acid significantly (p<0.05) reduced the growth rate of F. graminearum in both Glenn and Samson genotypes. Oxygenated fatty acids, including monohydroxy- and dihydroxy- fatty acids were identified in the MSC.
10
Rudjito, Reskandi Chastelia. "Pilot scale process for polysaccharide extraction and fractionation from cereal by-products." Thesis, KTH, Skolan för bioteknologi (BIO), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215022.
Full text
11
Thammakulkrajang, Rarinthorn. "Pressure-Assisted Thermal Processing of Bacterial Spores: Influence of Selected Product and Packaging Parameters." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1532014631156644.
Full text
12
Kudra, Li Liang. "Post-packaging irradiation combined with modified atmosphere packaging for control of bacterial pathogens on meat products." [Ames, Iowa : Iowa State University], 2007.
Find full text
13
Johnson, Carolyn. "The nutritional impact of fortified ready-to-eat cereals on the diets of school age children." Online version, 2000. http://www.uwstout.edu/lib/thesis/2000/2000johnsonc.pdf.
Full text
14
Hansson, Kristina. "Why do Fermented Milk Products Stick to Packaging Material Surfaces?" Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-68877.
Full textAbstract:
Today approximately 10 % of fermented milk products stick to the packaging material inner surface, and therefore it is not possible to pour all of the dairy product from the package. This is both an economical and environmental issue. The product loss is expensive for consumer and makes recycling of package less effective. As they do not yet exist the development of packaging materials to which fermented milk products stick less, it would make it possible to both save money and protect our environment. The aim of this work was to provide knowledge and understanding of the important factors involved in the phenomenon when fermented milk products adhere to the inner surface of a packaging material. Studies were done on materials having different surface properties, such as polarity and relative oxidation. They were incubated in fermented milk and other dairy products varying in fat concentration and protein type up to 168 h. The systems were investigated gravimetrically, with Fourier Transform Infra Red/Attenuated Total Reflectance Spectroscopy, Scanning Electron Microscopy and Contact Angle measurements. Fermented milk contains amphiphilic components and therefore can interact both with polar and non-polar surfaces, such that the relative oxidation of the surface does not contribute to the adhesion. The adhesion of fermented milk is an equilibrium reaction, which depend on the fat concentration before equilibrium as well as the protein concentration after equilibrium. The adhesion seems to follows the Vroman effect, with smaller molecules associating faster and thereby adhering to the surface initially, but are displaced by larger molecules that associates slower as times passes.
15
Kussad, Ahmad Adnan. "High speed product positioning of compliant food products for packaging." Thesis, University of Salford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261612.
Full text
16
Leavitt, Leah A. "Biodegradable packaging for corrosion inhibition via supercriticial fluid." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/6013.
Full textAbstract:
Thesis (Ph. D.)--University of Missouri-Columbia, 2007.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on December 28, 2007) Includes bibliographical references.
17
Mastio, Michael Joseph Becker Bryan R. "Material wear and failure mode analysis of breakfast cereal extruder and screw elements." Diss., UMK access, 2005.
Find full textAbstract:
Thesis (Ph. D.)--School of Computing and Engineering and Dept. of Mathematics. University of Missouri--Kansas City, 2005."A dissertation in engineering and mathematics." Advisor: Bryan R. Becker. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed June 26, 2006. Includes bibliographical references (leaves 133-134). Online version of the print edition.
18
Govaris, A. "Microcomputer process control and process evaluation of retort pouch products." Thesis, University of Strathclyde, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371973.
Full text
19
Senger, Pia, and Esra Özülkü. "German Generation Y’s PurchaseIntention towards Packaging-Free Products: A TPB Approach." Thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Företagsekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-39559.
Full textAbstract:
Background: The problem of increasing amounts of food packaging waste especially in Germany leads to the challenge of how to minor waste by using no packaging in order to listen to environmental-conscious generation y consumers. This is why retailers need to understand the factors impacting the purchase intention and thus, need to act in higher extend in terms of a preventive sustainable approach. Purpose: The purpose of this thesis is to examine the purchase intention of German generation y consumers towards packaging-free products. An extended Theory of Planned Behavior forms the theoretical foundation to investigate which factors are influencing the purchase intention the most. In addition to the original TPB factors attitude, subjective norms and perceived behavioral control, the research model was extended by two new factors, namely environmental concern and barriers. Method: Through an explanatory research method, the data was collected in a quantitative online survey based on a sample of 422 respondents. In order to investigate the relationships among the factors and to further support or reject the study’s hypothesis, the data was analyzedby using descriptive statistics, Pearson correlation and simple and multiple regression. Finally, to determine differences among groups additional tests have been conducted. Conclusion: The findings of this study revealed new insights about predictors of the purchaseintention: German consumers’ intention is mainly impacted by their attitude, followed by thefactor barriers, and perceived behavioral control, whereas subjective norms do not. Further, the other newly added factor environmental concern indirectly impacts the purchase intention through attitude. Moreover, the importance of including new added factors to the original TPB model is shown as the extended TPB model has improved its power in explaining German generation y’s purchase intention towards packaging free. By that, the respondents of this studyare highly environmental concerned and overall intent to purchase packaging-free products in mainstream grocery stores, oats and milk respectively. This study’s results provide valuable insights for marketers of German mainstream grocery stores who are interested in selectively integrating packaging-free shopping to their stores.
20
Francis, Jesse. "SENSORY ANALYSIS OF EQUINE FEED PRODUCTS." OpenSIUC, 2020. https://opensiuc.lib.siu.edu/dissertations/1787.
Full textAbstract:
Three experiments were conducted to investigate factors that may influence horse and consumer preference of equine feed products. The first experiment was a two-phase study designed to investigate the impact of oil-based palatants on horse preference when topically applied to a pelleted diet. In Phase One, treatment diets containing six palatants (banana, anise, apple, peppermint, spearmint, and orange) were compared to a control diet (corn oil) in a paired preference test. Phase Two then compared three palatants (anise, apple, and peppermint) to each other. Preference testing was comprised of a 15 second olfaction period followed by a 3 minute consumption period and first diet sniffed, first diet consumed, first action, aversive behaviors, excessive salivation, amount consumed, and number of chews were recorded. Results from Phase One revealed that orange negatively impacted palatability indicated by less consumption when compared to the control (P = 0.02), though there was no impact on chews per gram. No difference between control and treatment diets for first sniff or first consumed was observed when analyzed individually in either Phase One or Two, though there was a moderate positive correlation (ф = 0.39, P = 0.04) between olfaction and consumption during the peppermint and anise comparison. Consumption as the first action was consistent across all trials (P < 0.05). Anise was preferred over apple and peppermint as indicated by higher total consumption (P < 0.05) in Phase Two. The second experiment was designed to compare horse and consumer preferences of two horse treats products. Horses were presented with two different treat products in a paired preference test comprised of separate olfaction and consumption periods. Additionally, consumers evaluated the two different horse treat products separately for purchase intent as well as consumer preference using a Hedonic ranking scale of the sensory attributes. Consumer data were analyzed by comparing 1) the preferences of horse owning participants to non-horse owning participants, and 2) horse owning participants preference for the two different treat products. No difference was observed for first product sniffed, consumed, or finished during the horse preference test. However, moderate positive correlations were observed between first product sniffed and consumed (P = 0.01, ф = 0.40) as well as first product consumed and finished (P < 0.01, ф = 0.48). Consumer testing revealed lower ratings for Product A in size (P = 0.01), texture (P = 0.02), and purchase intent (P = 0.02) from horses owners when compared to non-horse owners. Horse owners rated Product A lower in appearance (P < 0.01), texture (P < 0.01), size (P < 0.01), and purchase intent (P < 0.01) than Product B.The third project investigated the influence of packaging on shelf life stability and horse preference of treats. Three packaging treatments (control, poly, and paper) were examined at five time points over a 12-month period. Treatments were analyzed for moisture, water activity, mold, yeast, pH, and volatile organic acids. Horse preference testing evaluated first treatment sniffed, consumed, and finished as well as number of treats consumed. Moisture content and water activity increased in all treatments (P < 0.01) from month 0 to month 12, with paper packaging providing a greater fluctuation and containing visible mold at month 12 (P < 0.01). No difference was observed for first treatment sniffed, consumed, or finished during preference testing. However a trend (P = 0.09) for the period*treatment interaction was observed for number of treats consumed, with a poly increasing while paper decreased. These data indicate that 1) palatants and packaging material influence horse preference of feed products, and 2) both horse and consumer testing should be considered during product development to maximize acceptance.
21
Chen, Hong. "An improvement pla [sic] of bliter [sic] packaging lines in Wright Products Corp." Online version, 1999. http://www.uwstout.edu/lib/thesis/1999/1999chenh.pdf.
Full text
22
Assouad, Marie-Christine. "Reformulation packaging studies to delay staling in a bakery product." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23866.
Full textAbstract:
Bakery products are important sources of nutrients in our diet. However, spoilage occurs shortly after baking. After microbial spoilage, the main spoilage problem is staling.Therefore, methods to control staling are of great importance to the bakery industry since staling results in millions of dollars annually in lost revenues.
Initial studies using a one variable at a time approach showed that enzymes, guar, algin and pectin gums and high fructose corn syrup could delay staling and resulted in an organoleptically acceptable product. Subsequent optimization studies using a Response Surface Methodology (RSM) approach show the appropriate levels of enzyme (Novamyl), guar gum and HFCS resulted in bagels with a textural and sensorial shelf life of 6 weeks at ambient temperature.
Furthermore, the cost of reformulating ($ sim$0.5 cent/bagel) is minimal and could easily be recovered through reduced production costs, reduced losses due to staling and additional sales and market areas.
23
Ben-Belhassen, Boubaker. "Econometric models of the Argentine cereal economy : a focus on policy simulation analysis /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9842508.
Full text
24
Fuenzalida, Polanco Almendra, and Sandoval Sebastián Mogollon. "Atributos de green products con enfoque en packaging relacionado con el green trust." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/654501.
Full textAbstract:
La presente investigación se concentra en conocer como uno de los atributos de un green product, como el packaging, es de suma importancia al momento de establecer la relación con la confianza que el consumidor busca al momento de comprar un producto eco amigable, ya que es lo primero que verán en el punto de venta o por alguna plataforma digital.
La tendencia de optar por productos que tengan un impacto positivo para el medioambiente empezó a inicios de los noventas. Esta tendencia se conoce como green marketing y tiene como objetivo que las empresas creen, produzcan y promuevan un tipo de producto, con un impacto positivo en el medio ambiente y satisfacer las necesidades de los consumidores. Es asi como nace un green product, un artículo producido con propósito ambiental incluso hasta la última etapa del ciclo de vida de este. Parte importante de un green product es el packaging que también debe cumplir con la promesa de ser pro Ambiental. Este empaque debe generar seguridad y confianza a los consumidores, ya sea a través del diseño, materiales o certificaciones que avalen que es un producto 100% ecológico. La importancia del empaque genera, como se mencionó líneas arriba, una relación de confianza de la marca con el consumidor, ya que es a través de este atributo se puede generar expectativas sobre si tiene un desempeño ambiental o no.This research focuses on knowing how one of the attributes of a green product, As the packaging, It is of utmost importance when establishing the relationship with the trust that the consumer looks for when buying an eco-friendly product, since it is the first thing they will see at the point of sale or through a digital platform. The trend to opt for products that have a positive impact on the environment began in the early 1990s. This trend is known as green marketing and its objective is that companies create, produce and promote a type of product, with a positive impact on the environment and satisfy the needs of consumers. This is how a green product, an item produced with an environmental purpose even up to the last stage of its life cycle. Important part of a green product is its packaging which must also fulfil the promise of being pro environmental. This packaging must generate security and confidence in consumers, either through the design, materials or certifications that guarantee that it is a 100% ecological product. The importance of packaging generates, as mentioned above, a relationship of trust between the brand and the consumer, since it is through this attribute that expectations can be generated about whether it has an environmental performance or not.
Trabajo de investigación
25
Mutafchiyski, Alexander. "Trademark Rights under the Plain Packaging Regime and the New Tobacco Products Directive." Thesis, Uppsala universitet, Juridiska institutionen, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-324371.
Full textAbstract:
With the entry into force of the Second Tobacco Products Directive1 (hereinafter TPD), new labelling requirements for tobacco products are being introduced for ensuring greater protection of public health. Notably, the TPD harmonises minimum requirements of the WHO’s Framework Convention on Tobacco Control and its Guidelines, consisting of pictorial warnings and information about the harmful effects of smoking (Article 9 and 10 TPD), covering 65% of the tobacco package2, but also provides the possibility for Member States to introduce further more stringent measures (Article 24(2) TPD). Only brand names in a standard font are allowed to be displayed on a package with neutral colour without any trademarks.3 This thesis is specifically concerned with the effect of the TPD’s new labelling requirements (plain packaging) on the intellectual property rights (trademark rights) of the tobacco manufacturers. The justifications for the new limitations are considered from a broader EU perspective and from an Intellectual Property law one. The paper reflects on the character of protection that there is no deprivation nor expropriation of property, but a mere control of use and that the right conferred upon registration of a mark is ius excludenti alios and not a right to use. These justifications are based on examination of case law, legislation provisions and it is relied on the surveys approved by the WHO and made post-implementation of plain packaging in Australia. However, it is suggested that the use of trademarks has become an indispensable part of the economic reality and through plain packaging the trademark proprietors’ interests are being undermined. Consequently, it is argued that the new regime is oppressive towards the interests of the trademark proprietors and is not the most effective for attaining the public health objective, by drawing upon sociological and economical research. Finally, the thesis criticises a plain packaging regime as being detrimental to trademark owners and its potential spillover effect to other industries, the risk of increase of illicit trade and counterfeits, which will cause a whole area of intellectual property to become redundant.
26
Grove, Tina Moler. "Use of Antimycotics, Modified Atmospheres, and Packaging to Affect Mold Spoilage in Dairy Products." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/26512.
Full textAbstract:
The effects of natamycin, oxygen scavengers and a 25% CO₂:75% N₂ modified atmosphere on the growth of Penicillium roqueforti in shredded cheddar and mozzarella cheese stored at 10°C for 0, 60, 120, or 180 day was studied. Microbiological and sensory testing was assessed on 0, 7, 14 and 21 days after opening. Carbon dioxide decreased (P<0.05) as O₂ (P>0.05) and N₂ (P>0.05) increased throughout storage. Cheddar and mozzarella cheeses were stored for 180 and 60 days, respectively without significant (P> 0.05) increases in yeast and mold populations. Fungal populations increased significantly (P< 0.05) after packages were opened. Differences in yeast and mold (YM) counts during storage and once the packages were opened were independent of natamycin application and presence, O₂ scavengers and inoculated Penicillium roqueforti for both types of cheeses.
Growth of Penicillium roqueforti, Aspergillus niger, Geotrichum candidum and Neosartorya fischeri were evaluated in atmospheres of 0:30:70, 0.5:29.5:70, 1:29:70, 2:28:70, and 5:25:70, O₂:CO₂:N₂ over a 5-day period. Spores were cultured on antibiotic-supplemented potato dextrose agar (pH 5.6, aw 0.95) and incubated at 25°C. All four molds germinated and grew at 0.5:29.5:70. Extent of mycelia growth diameter (mm) increased significantly (P<0.05) as oxygen concentration increased from 0.5% to 5%. All growth was inhibited at 0:30:70, but germination and growth occurred once cultures were exposed to 20.9% atmospheric O₂, indicating that a modified atmosphere containing no residual O₂ is fungistatic.
Yeast and mold growth was seen in ultra-pasteurized (UP) extended shelf-life fluid milk stored at (7.2°C). Ten half-pint, pint, quart and half gallon filled cartons were randomly selected from all UP products available. Samples, pulled at random on day 0, 15, 30, 45, and 60, were plated on Yeast and Mold Petrifilm™. Forty-seven percent of the UP products stored for 45 days tested positive for mold. Fungal growth was apparent down the side and along the bottom of the 5th panel. Contamination was traced to the presence of yeast and mold spores in paperboard cartons. Pinholes were present in the polyethylene coating and wicking occurred at the unskived 5th panel. Fungi of similar origin and fatty acid profile were isolated from UP milk products and the paperboard cartons.Ph. D.
27
Nam, Sung Wook. "Prospects of grain production, consumption and trade in North Korea /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9904862.
Full text
28
Phillips, Daphne 1956. "Safety studies with proteolytic Clostridium botulinum in high-moisture bakery products packaged under modified atmospheres." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84412.
Full textAbstract:
Initial challenge studies with spores of proteolytic Clostridium botulinum types A and B (~104 spores/g) showed that while air- and gas-packaged English-style crumpets (aw 0.990) and pizza crust (aw 0.960) were toxic after 42-days storage at ambient temperature (25°C), no neurotoxin was detected in bagels (a w 0.944). Further challenge studies with similarly packaged crumpets inoculated with C. botulinum (~102 spores/g), pre- or post-baking, demonstrated that all crumpets were toxic within 4 to 6 days at 25°C and that toxigenesis preceded spoilage. Furthermore, reformulating crumpets to pH 8.3 and packaging in 100% CO2 had little effect in delaying the growth of C. botulinum compared to crumpets formulated to pH 6.5 and packaged in 60% CO2.Subsequent studies were directed at determining the levels of additional barriers that could be used to ensure the safety of high-moisture MAP crumpets. While ethanol vapour proved to be an effective additional barrier in crumpets (100-g, [aw 0.990, pH 6.5]) challenged with ~102 spores/g of C. botulinum, spoilage preceded toxigenesis due to absorption of ethanol from the package headspace by crumpets. Modelling studies in Trypticase Peptone Glucose Yeast (TPGY) broth confirmed the anti-botulinal nature of ethanol and showed that a level of ~4% (vol/vol) could be used for complete inhibition of this pathogen, depending on the aw and pH of the growth medium. However, while ethanol vapour could be used to inhibit the growth of C. botulinum in high-moisture crumpets, its anti-botulinal efficacy was influenced by the method of crumpet leavening (yeast v chemical).
Preliminary studies were also done to assess the potential of mastic oil, a novel inhibitor, against C. botulinum. While direct and indirect application of ethanolic extracts of mastic oil inhibited the growth of C. botulinum in vivo, they failed to do so in crumpets.
29
Simpson, Marian V. "Shelf life and microbiological safety studies on minimally processed, refrigerated "sous-vide" products." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41134.
Full textAbstract:
Previous results indicated that lactic acid bacteria (LAB) and Bacillus spores were the predominant spoilage microorganisms in minimally processed products after 35 days storage at 15$ sp circ$C. Furthermore, most packages were swollen due to carbon dioxide production by the LAB. The fact that spores survived mild heat treatment is of concern since it implies that other more pathogenic spores, e.g. Clostridium botulinum would also survive and may pose a public health problem in products stored at 15$ sp circ$C. As such, the influence of combination treatments (viz., mild heat processing treatment, pH, water activity, storage temperature, lactic acid bacteria) were evaluated through challenge studies with selected strains of C. botulinum type A, B, and E spores. The shelf life and safety of the products following a 13D process at 75$ sp circ$C, could be extended to $ ge$42 days by a combination of pH $ le$ 5.0 and storage at 5$ sp circ$C. Other combination treatments were also effective in controlling growth of, and toxin formation in the products by C. botulinum. For instance, botulinum toxin was not detected until day 35 in inoculated spaghetti and meat sauce products (pH 5.25 and a$ sb{w}$ 0.992) with type A and B spores and stored at 15$ sp circ$C. Shelf life extension and inhibition of toxin production was also possible through reductions in a$ sb{w}$ levels achieved by addition of 1-3% salt (w/w) to the products. Water activity levels of $ le$0.983 prevented botulinum toxin production in the minimally processed spaghetti and meat sauce product for $ ge$42 days during storage at 15$ sp circ$C.Similar trends were observed in sous-vide rice and salmon products. Furthermore, when sodium lactate was used as the humectant to lower the a$ sb{w}$ of this product, toxin production was also delayed, but not to the same extent as achieved with NaCl. When two strains of bacteriocin-producing lactic acid bacteria were co-inoculated separately in the sous-vide rice and salmon products that had been challenged with C. botulinum type E spores, toxin formation was only slightly delayed in products with added NaCl (1%), while toxin formation was neither delayed nor prevented in similarly lactic acid bacteria-treated samples with no added NaCl. Furthermore, in most of the products in which botulinum toxin was detected, spoilage preceded toxigenesis, however, in some samples stored at 5$ sp circ$C toxigenesis preceded spoilage. Addition of $ alpha$-2-macroglobulin at a level of 2.7 ppm did not delay or prevent toxin formation in the product. Microwave heating of products at half-power or full power (800 Watts) for 5 to 10 min proved effective in inactivating all of the pre-formed toxin in toxic samples. (Abstract shortened by UMI.)
30
Masavang, Supuksorn. "Sugar reduction in extruded cereal based products : impact of water content on the structure and molecular dynamics in such material." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCK025/document.
Full textAbstract:
Les systèmes à base de biopolymères à faible teneur en humidité sont couramment rencontrés dans les aliments. Bien entendu, il est primordial de comprendre les bases physiques de leur qualité: texture, performances dans le temps ou en fonction de leur composition. Le vieillissement physique des systèmes composites rend les changements survenant dans le stockage des produits comestibles difficiles à prévoir. Les objectifs de ce travail étaient d'évaluer l'incidence de la présence de saccharose et de la teneur en eau de fabrication sur les propriétés physico-chimiques du produit fini. La stabilité physique de ces matériaux a été contrôlée grâce à une étude à différentes échelles moléculaires. Ensuite, les relations entre les données multi-échelles ont été examinées. L'effet du saccharose (0 à 20%) et de l'eau d'alimentation (10 et 15%) sur les mélanges d'extrusion a été étudié à l'aide d'un extrudeur double vis conduit dans les mêmes conditions. Les propriétés physiques et microstructurales des produits extrudés expansés ont été examinées sous diverses conditions d'humidité relative. La réduction des teneurs en sucre et en eau d’alimentation a fait augmenter la pression et l’énergie mécanique spécifique, ce qui a réduit la dégradation de l’amidon et augmenté la viscosité dans l’extrudeur en particulier à la teneur en eau la plus élevée. L'augmentation de la pression dans l’extrudeur a entraîné une expansion plus importante des extrudés. Par contre, la technique d'imagerie neutronique montré que le saccharose réduisait la taille des pores, et donc augmentait la densité apparente et ce qui était particulièrement évident en utilisant. Cette technique a été appliquée pour la première fois sur des produits extrudés. Les images de tomographie 2D ont indiqué des différences structurelles internes entre les extrudés à différentes teneurs en saccharose et stockés à humidité relative différente. Toutefois, l'analyse d'images 3D a montré que l'impact de ces facteurs sur la distribution de la taille des pores et le taux de porosité n'était pas significatif. En fin d'extrusion, les échantillons étaient à l'état amorphe à la suite de la gélatinisation de l'amidon et de la fonte du sucre. Leursrs propriétés thermiques ont été analysées par analyse enthalpique différentielle (AED) et les températures e transition vitreuse ont été étudiées. Les thermogrammess d’AED ont été minutieusement étudiés via une déconvolution de la dérivée première de la variation d’enthalpie. Cette approche a mis en évidence que les systèmes composites étudiés présentaient des phases multiples avec des transitions vitreuses distinctes. Ces dernières sont associées à une phase riche en polymère (amidon principalement) et / ou à une phase riche en plastifiant (sucre) dont le comportement dépendait de la teneur en eau de l'échantillon. Les isothermes de sorption ont montré qu’aux faibles Aw et pour une valeur donnée, a la teneur en eau des extrudés diminuait avec l’augmentation des teneurs en saccharose et que l'effet inverse était observé aux aw élevées. L’étude de la cinétique apparente de lala diffusion de l'eau a mis en évidence deux sites de sorption différents. Le premier est caractérisé par une cinétique quasi constante qui pourrait correspondre à un phénomène d'adsorption à la surface. Le second site présente d’abord un ralentissement initial de la cinétique de sorption, tandis qu’une forte augmentation est constatée lorsque la teneur en eau était plus élevée. Ce comportement peut être lié à un effondrement de la structure. Une étude par RMN à cyclage de champ rapide à basse fréquence a montré que les temps de relaxation dépendaient de la teneur en saccharose et en eau. Une carte de stabilité a été tracée pour modéliser les évolutions rhéologiques des matrices avec la teneur en eau en lien avec les transitions de phases des matériaux (...)Low-moisture biopolymer-based systems are commonly encountered in food. Obviously, understanding the physical basis of their quality: e.g texture, or performance over time or as a function of their composition is of primary importance. The objectives of this work were to evaluate how the presence of sucrose and water content affects physico-chemical properties. The physical stability of these materials were monitored through an insight at different molecular scales. Then the relations between the multi-scale studies were investigated. The effect of sucrose (0–20%) and feed water (10 and 15%) on extrusion blends was studied using a twin screw extruder under the same processing settings. The physical and microstructural properties of extruded products were examined at various RH. Reducing both sugar levels and feed water increased die pressure and specific mechanical energy, as a consequence, it reduced starch degradation and increased in viscosity. The effect was more pronounced with increasing feed water content. The increased die pressure resulted in higher expansion of the porous extrudates. Sucrose was shown to increase the bulk density and reduce the pore size, this was particularly evident by using neutron imaging technique. This technique was applied for the first time in extrudate. 2D tomography images indicated internal structural differences between extrudates containing different sucrose content and stored at low and high % RH, while 3D image analysis showed impact of these factors on pore size distribution and % porosity were not significant. The extruded samples were in the amorphous state as a result of starch gelatinization and sugar melting. Their thermal properties were analyzed with DSC and their Tg were studied. The DSC thermograms were thoroughly studied through a Gaussian deconvolution of the first derivative of their heat low. This approach evidenced a multiple phase behavior with different glass transitions in composite systems. They were associated with either a polymer-rich phase and/or a plasticizer-rich phase which behavior depended on the sample water content. Physical aging accompanied with an increase in rigidity at low aw, resulted in an increased bulk density and more pronounced with increasing sucrose content. Sorption isotherms showed the water content of extrudates decreased when product contains high sucrose at low aw range and the inverse effect was observed at high aw. Apparent kinetics of water diffusion showed two different sorption sites, the first kinetics was almost constant and could be adsorption phenomena at the surface. The second one reflected first an initial slowing in dynamics whereas a sharp increase was found at higher water content. Addition of sucrose or water decreased both Tgs in extrudates. Young's modulus showed water acts as anti-plasticizer at low aw, while it shows a plasticizing effect at high aw. A stability map can explain the brittle-ductile transition occurred below Tg. Fast field cycling NMR study at low frequency highlighted that T1 depended on sucrose and water content. T1 and T2 measured using Low field NMR decrease as a function of water content, while the impact pf sucrose were not significant. T2 showing a minimum probably indicating the exchange of protons of water and macromolecules in composite system. The impact of sucrose content was not significant for T1 and for T2 at low water content. FFC NMR showed T1 results consistent with the LF NMR measurement.In conclusion, physicochemical studies of the influence of water and sucrose content on glassy materials showed that the material properties can be investigated at different levels from the macro- to the microscopic scale and these results clearly presented the need for complementary techniques to probe the dynamics in the glassy state of heterogeneous food systems that could be facilitated to manage the stability during storage of this type of dry products
31
Aigster, Annelisse. "Physicochemical and Sensory Properties of Resistant Starch-Based Cereal Products and Effects on Glycemic and Oxidative Stress Responses in Hispanic Women." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/28934.
Full textAbstract:
The incidence of type 2 diabetes is considered an epidemic in Western countries, and its prevalence is more common in the Hispanic population than in non-Hispanic whites. Postprandial hyperglycemia has been associated with oxidative stress (OS), thus; reducing postprandial glycemia and/or OS through dietary consumption of resistant starch (RS) may be one approach to help modulate glucose and insulin responses. The purpose of this study was twofold: 1) to evaluate the physicochemical and sensory properties of cereal food products supplemented with RS. 2) to compare the effects of a single ingestion of granola bars with high (~18 grams of RS) and low (~0 grams of RS) RS compositions on the postprandial glucose and insulin responses (n=14) and oxidative stress parameters (cellular glutathione peroxidase, F2- isoprostanes, and oxygen radical absorbance capacity) in Hispanic women (n=9). Granola bars and cereals were developed to provide 2 levels (10% and 15%) of RS; isocaloric (0% RS) control samples were prepared with readily digestible (high amylopectin) starch. Samples were stored for up to 4 weeks at 20 °C. Mean composition of the high RS granola bars was 6% protein, 15% moisture, and 18% lipid. RS levels slightly increased from 14 to 16 g/serving after 4 weeks of storage, supporting published research that RS increases with storage due to retrogradation and crystallization of amylose chains. Color became lighter as the level of RS increased (p<0.001). Granola bars containing RS were less brittle (p=0.0043) than control granola bars. Sensory results indicated granola bars/cereals were acceptable. RS-supplemented granola bars were then used for the evaluation of RS ingestion in humans.
There was no difference in postprandial glucose and insulin responses after a single ingestion of a RS-supplemented (18 g) granola bar. No differences were found in the oxidative stress parameters measured. In a subgroup of subjects (n=9), a lower glucose response 30 minutes after RS consumption was found (p=0.0496). Thus, RS consumption may lower fluctuations in blood glucose, which may help manage glucose levels in individuals at risk of type 2 diabetes. Further studies of short term RS consumption are warranted to elucidate its benefits in glucose management.Ph. D.
32
Sarri, Elli. "Environmental auditing and the labelling of products and packaging : a design management model for corporate decision makers." Thesis, De Montfort University, 1999. http://hdl.handle.net/2086/4216.
Full text
33
Cui, Wenbin. "Comparative Evaluation on Human Infants Dietary Mercury Exposure through Consumption of Fish and Rice Products." FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3464.
Full textAbstract:
Human exposure to methylmercury (MeHg) through diets (e.g., fish and rice) is a global health concern. Although MeHg exposure through fish consumption has long been considered the major route of mercury health risks, studies concerning the long-term changes in MeHg exposure from fish remain lacking. In sharply contrast to the fish MeHg issue, the presence of MeHg in rice has only been reported recently and its implications on MeHg exposure, albeit probably important, are still in infancy. Focusing on the discrepancies in the studies of MeHg exposure through fish and rice consumption, this study was aimed to assess the MeHg exposure of human infants through consumption of rice cereals and to evaluate the long-term changes in fish MeHg. The presence of MeHg in rice prompted the studies on MeHg concentrations and bioaccessibility in rice cereals and potential infant dietary exposure to MeHg through cereal consumption, which is believed to be the first of its kind. The analysis of a variety of infant cereals sampled from the common markets in the United States and China showed that the concentrations of MeHg in the cereals ranged from 0.07 to 13.9 µg/kg with a mean of 1.61 µg/kg. On the basis of these MeHg concentrations, the daily intake of MeHg through rice cereal consumption for infants was estimated to be 4-122% of the reference dose (RfD). The MeHg bioaccessibility in the cereals, determined using an in vitro digestion method, ranged from 25 to 74% with a mean of 48±16%. A further examination on these results, however, revealed the occurrence of MeHg re-adsorption during extraction steps, which leads to the underestimation of MeHg bioaccessibility and warrants cautions to be exercised when using these procedures to evaluate bioaccessibility in general. The long-term changes in fish MeHg were investigated through conducting a comprehensive data analysis on datasets for the Everglades, a well-studied aquatic ecosystem for Hg contamination. The results showed a clear decline of MeHg in mosquitofish in the Everglades during the past two decades, which was probably related to changes in environmental conditions (e.g., periphyton, dissolve organic matter, and sulfate) instead of mercury deposition.
34
Ghann, William Emmanuel. "Studies of Surfactants Effect on Riboflavin Fluorescence and Its Determination in Commercial Food Products and Vitamin Tablets." Digital Commons @ East Tennessee State University, 2008. https://dc.etsu.edu/etd/2000.
Full textAbstract:
A simple and economical fluorometer using blue LEDs excitation sources and simple PMT detection had been built, assembled, optimized, and employed for measurement of fluorescence from riboflavin (vitamin B2). Surfactants have been known to enhance the intensity of fluorescence of fluorescent compounds. Fluorescence analysis of riboflavin in the presence of various anionic, cationic, and nonionic surfactants was also conducted to determine if they could improve analysis. However, the surfactants employed did not seem to have any meaningful enhancement; in fact, some actually diminished the fluorescence intensity of riboflavin. The procedure was linear for riboflavin from 0.01 to 2.5 μg/mL. Reproducibility expressed as relative standard deviation was about 2%. The recoveries obtained range from 91.3% to 100.21% for the samples determined. The proposed method was successfully applied to the analysis of riboflavin in commercial vitamin tablets and cereal products. The results obtained were consistent with expected values as provided by the manufacturers. The method is simple, sensitive, economical, and rapid.
35
Liu, Jiun Ni 1976. "Formulation, shelf-life and safety studies on value-added trout products packaged under modified atmospheres." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=30690.
Full textAbstract:
Value-added trout burgers and trout wontons were prepared from minced trout trimmings, oats, dried onion flakes, white pepper, cayenne pepper, garlic powder, soy sauce, spice mix and eggs. The trout burgers were coated with crushed cornflakes and then partially cooked (2 min at 140ºC) or frilly cooked (5 min at 140ºC) in hot oil. Similar fillings were used to prepare trout wontons by wrapping the mixture with Chinese wonton dough and 2 products were made: raw wonton (uncooked) and fried wonton (fried for 8 min at 140ºC).Storage trials were performed on raw and fried trout wontons (a w 0.98--0.95, pH 6.5), and partially and fully cooked trout burgers (aw 0.97--0.96, pH 6.4). Products were packaged in air and under various modified atmospheres (MAP), and stored at 4 and 12ºC. A microbiological shelf-life of >28 days was possible for the cooked trout burgers and fried wontons stored at 4ºC. In general, the microbiological shelf-life preceded the sensory shelf-life.
Subsequent challenge studies were done to address the safety concerns associated with MAP food. All products were inoculated with 102 CFU/g of Listeria monocytogenes and 102 spores/g of Clostridium botulinum type E spores. Gas packaging with 80% CO2 (balance N2) inhibited the growth of L. monocytogenes in products stored at 4ºC. However, counts of L. monocytogenes increased in all other packaging conditions. In challenge studies with C. botulinum type E, toxin was not detected in any products after 28--60 days.
36
Lövdahl, Maria, and Karin Palmér. "Different unit price of packaging sizes matter for food waste : A case study how companies' price strategies of different packaging sizes of dairy products affect the emissions of CO2 equivalents." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-36768.
Full textAbstract:
One third of all food that is produced ends up as waste, making it an important for society. Companies in food sector offer various packaging sizes to consumers to meet different household needs, where smaller packaging sizes often have a higher unit price than larger packaging sizes. In Sweden, 70% of households consist of 1-2 person households, which indicate a need for smaller packaging sizes. Price is a determining factor in the choice of products, which may mean that consumers choose packaging size by price and not after their need. This master thesis has focused on dairy products because it is one of the product groups where wastage is highest. Furthermore, dairy products are important in the Swedes diet, have high emission of CO2-equivalents and can be bought in different packaging sizes. The purpose of this master thesis was to investigate how companies’ price strategy influence product price of small versus large packaging and also to investigate the emission of CO2-equivalents of different packaging sizes. This was done in order to get a better understanding of the subject and to find a recommendation for companies to help households to reduce food waste. A case study was used as research strategy, and through a mixed-method with calculations, interview, price gathering and collection of secondary data a result has been presented. The results indicate that more food can be wasted from an economical perspective than from the perspective with emission of CO2-equivalents, which is true for all investigated products. It results in lower emission of CO2-equivalents if the customers purchase smaller packaging instead of waste food. However, there will be difficult to reduce the amount of household food waste if it continues to be economically motivated to waste food instead of purchase smaller packaging. A cost based pricing of food products is not useful if the consumers shall reduce their food waste, since price is an important factor when choosing products. One way to reduce the household food waste is to shift towards more value-based strategies when pricing products. This might reduce the unit price gap between different packaging sizes.En tredjedel av all mat som produceras slutar som matavfall, vilket gör det till en viktig samhällsfråga. Livsmedelsföretagen erbjuder olika förpackningsstorlekar till konsumenterna för att möta olika hushålls behov, där mindre förpackningsstorlekar oftast har ett högre jämförelsepris än större förpackningar. I Sverige är 70% 1-2 personers hushåll vilket innebär ett behov av mindre förpackningsstorlekar. Pris är en avgörande faktor vid val av produkter, vilket kan innebära att konsumenterna väljer förpackningsstorlek efter pris och inte efter behov. Denna examensuppsats har fokuserat på mejeriprodukter eftersom det är en av produktgrupperna som det slängs mest av. Mejeriprodukter är dessutom en viktig del av svenskarnas diet, har ett högt utsläpp av CO2-eqvivalenter och kan köpas i olika förpackningsstorlekar. Syftet med denna examensuppsats var att undersöka hur företagens prisstrategi påverkar produktpriset på små kontra stora förpackningar och också att undersöka utsläppet av CO2-eqvivalenter på olika förpackningsstorlekar. Det gjordes för att få en ökad förståelse av ämnet och för att hitta en rekommendation till företag att hjälpa hushållen att minska matsvinnet. En fallstudie användes som forskningsstrategi och genom en mixad metod med beräkningar, intervju, prisinsamling och insamling av sekundärdata har ett resultat presenterats. Resultatet visar att det går att slänga mer mat ur ett ekonomiskt perspektiv än ur ett perspektiv med utsläpp av CO2-ekvivlaenter, vilket överensstämmer för samtliga undersökta produkter. Det resulterar i mindre utsläpp av CO2-eqvivalenter om konsumenterna köper mindre förpackningar istället för att slänga mat. Det kommer däremot att bli svårt att minska mängden matsvinn från hushållen om det fortsätter att vara ekonomiskt motiverat att slänga mat istället för att köpa mindre förpackningar. En kostnadsbaserad prissättning av produkter är inte användbar om konsumenterna ska minska sitt matsvinn eftersom priset är en viktig faktor vid val av produkter. Ett sätt att minska hushållens matsvinn är att byta till mer värdebaserade strategier vid prissättning av produkter. Detta kan minska skillnaden i jämförelsepris mellan olika förpackningsstorlekar.
37
De, Jongh Jacolene. "Ontwikkeling van 'n laevetgraanproduk en die effek van verskillende veselvlakke op die glukemiese indeks." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52975.
Full textAbstract:
Thesis(MSc Food Sc )--Stellenbosch University, 2002.ENGLISH ABSTRACT: Consumers are becoming more health conscious. Furthermore, time is a scarce human resource and therefore convenience is an important consideration when food choices are being made. A South African food company identified this trend and decided to develop a product that capitalised on these demands of health and convenience. The decision was made to develop a low-fat, low-cholesterol, low-saturated fatty acid, low-trans fatty acid, high-fibre wheat product with an intermediate glycemic index (GI). The market in Stellenbosch was scouted to determine whether a similar product already existed. Six products that made nutrient-, health- or any other claims were identified. Not one of the identified products, however, conformed to meet the requirements of the Department of Health for the product characteristics that were set. Therefore, the decision was made to continue the development of the low-fat, low-cholesterol, low-saturated fatty acid, low-trans fatty acid, high-fibre wheat product with an intermediate glycemic index (GI). To qualify as a low-fat product, the product had to contain less than 3 % fat. The ingredients were chosen with their fat content in mind. Fruit pulp is widely used in the preparation of baked low-fat products and was also used in this study to eliminate the use of butter, margarine and oil, but also to achieve the additional product criteria that was set by the food company, namely a chewy texture and a fruity flavour. Ingredients like soya flour, oatmeal, oats and wheat bran were chosen to increase the fibre content of the product, because all of these products have a fibre content of 10 g or more per 100 g. Two products were developed during 23 experiments. Except for the high fibre claim, both products met the criteria that were set before the development started, namely a low-fat, low-cholesterol, low-saturated fatty acid, low-trans fatty acid, high-fibre content and a calculated intermediate glycemic index (GI). One of the two concept products that were developed were chosen by an experienced panel to serve as basic product for an empirical study on the effect of different fibre levels on the glycemic index. Five different fibre levels were formulated by manipulating the amounts of wheat bran and oatmeal. The basic formula contained 6,25 % fibre and the other fibre levels were identified as: 4,39; 5,31; 7,45 en 8,17 %. The fibre levels were equal-distant. The prediction was made that the GI-value of the product will decrease as the fibre levels increase and the theoretical calculations confirmed this prediction. The real GI-values that were determined by blood glucose testings, however, showed an increase in GI-value up to the 6,25 % fibre level, followed by a.decrease in GI-value to the 8,17 % fibre level. It became apparent that more than just fibre played a role in the GI-values of the products. It is proposed that the results explained by fibre behaviour, starch gelatinisation and starch hydrolysis. Hundred households in Stell enbosch tested the developed product. Two fieldworkers identified 25 consumers in four retail stores in Stellenbosch and gave them the product and the questionnaire, which they had to complete at home after tasting the product. The questionnaires were then collected from the respondents' houses. A recognised measurement instrument, which is used by the South African food industry to determine the acceptability of a newly developed product, was used for assesing the results. The results showed that the orange flavour of the product led to a low overall acceptability of the developed product and that the other product concept (that was developed during the recipe development phase and not chosen by the panel) should be considered for testing its market potential. Another facet of the questionnaire determined the effect of buying practices, health consciousness and consumer knowledge on the consumer acceptability of the low-fat, high-fibre wheat product with an intermediate-GI-value. No correlation between these factors and consumer acceptability of the low-fat, high-fibre wheat product with an intermediate-GI-value were found.
AFRIKAANSE OPSOMMING: Die verbruiker word al meer gesondheidsbewus: Terselfdertyd is tyd 'n skaars menslike hulpbron, en word gerief gevolglik 'n belangrike oorweging tydens voedselkeuses. 'n Suid-Afrikaanse voedselmaatskappy het hierdie neigings geidentifiseer en besluit om 'n produk te ontwikkel wat aan hierdie vereistes van gesondheid en gerief voldoen. Daar is besluit om 'n lae vet-, lae cholesterol-, lae versadigdevetsuur-, lae transvetsuur-, hoe veselgraanproduk met 'n intermediere glukemiese indeks (GI) te ontwikkel. Die Stellenbosse mark is verken om vas te stel of daar reeds soortgelyke produkte op die mark was. Ses produkte wat nutrientinhoud-, gesondheid- of ander aansprake maak, is geidentifiseer. Geeneen van die produkte het egter aan die Departement van Gesondheid se konsepregulasies betreffende die etikettering van voedingsmiddels vir bogenoemde produkeienskappe voldoen nie. Gevolglik is besluit om met die ontwikkeling van die lae vet-, lae cholesterol-, lae versadigdevetsuur-, lae transvetsuur-, hoe veselgraanproduk met 'n intermediere GI voort te gaan. Om as 'n laevetproduk te kon kwalifiseer, moes die produk minder as 3 % vet bevat. Die bestanddele moes dus met inagneming van hul vetinhoud gekies word. Vrugtepulp word algemeen gebruik in die bereiding van gebakte laevetprodukte en is ook in hierdie studie gebruik om die gebruik van botter, margarien of olie te vermy, maar ook om aan die addisionele produkkriteria wat deur die maatskappy gespesifiseer is, naamlik 'n sagte tekstuur en vrugtige geur, te voldoen. Bestanddele soos soja-, hawermeel, hawer- en koringsemels is gekies om die veselinhoud van die produk te verhoog, aangesien hierdie bestanddele meer as 10 g vesel per 100 g bevat. Twee produkte is deur middel van 23 eksperimente ontwikkel. Met die uitsondering van die hoeveselinhoudaanspraak, het beide produkte aan die vereistes wat gestel is, naamlik 'n laevet-, laecholesterol-, laeversadigdevetsuur-, laetransvetsuur- en 'n hoeveselinhoud en 'n beraamde intermediere GI, voldoen. Een van die konsepprodukte is deur 'n ervare paneel gekies vir die empiriese studie waar die effek van verskillende veselvlakke op die GI bepaal is. 'n Standaard formule is aangepas om vyf verskillende veselvlakke te verkry deur die koringsemel- en hawermeelhoeveelhede te manipuleer. Die basisformule het 6,25 % vesel bevat en twee veselvlakke is daarbo en -onder as ge·identifiseer: 4,39; 5,31; 7,45 en 8,17 %, dit wil sê, veselvlakke met dieselfde grootte verskille. Daar is voorspel dat die GI-waarde van die produkte sou daal met 'n toename in die veselinhoud van die produk en die teoretiese berekeninge van die GI-waarde het hierdie voorspelling gestaaf. Die werklike GI-waardes wat met behulp van bloedglukoseresponse bepaal is, het egter 'n toename in GI-waarde tot by die 6,25 % veselvlak, gevolg deur 'n afname tot by die 8,17 % veselvlak aangedui. Dit het duidelik geword dat meer as slegs die veselinhoud 'n rol gespeel het by die GI-waarde van die produk. Die resultate is gevolglik aan die hand van die veselgedrag, styselgelatinisasie en styselhidrolise verklaar. Die verbruikersaanvaarbaarheid van die ontwikkelde laevet-, hoeveselproduk is by 100 huishoudings in Stellenbosch getoets. Twee veldwerkers het die verbruikers in vier kleinhandelaars in Stellenbosch genader en produkte met 'n gepaardgaande vraelys aan hulle oorhandig. Die produkte is tuis qeevalueer en die vraelyste is weer ingesamel. Ook vervat in die vraelys was 'n erkende meetinstrument wat deur die Suid-Afrikaanse voedselindustrie gebruik word vir die bepaling van verbruikersaanvaarbaarheid van 'n nuutontwikkelde produk. Uit die resultate het dit geblyk dat die lemoengeur van die produk gelei het tot die lae verbruikersaanvaarbaarheid van die ontwikkelde produk, en dat die ander produkkonsep (wat tydens die resepontwikkelingsfase ontwikkel is, en nie deur die ervare paneel gekies is nie) vir bemarkingspotensiaal getoets hoort te word. Die data wat uit die vraelyste ingesamel is, is ook gebruik om die effek van aankooppraktyke, gesondheidsbewustheid en verbruikerskennis op die verbruikersaanvaarbaarheid van die laevet-, hoeveselgraanproduk met 'n interrnediere-Gl-waarde te bepaal. Daar is geen verwantskap tussen hierdie faktore en die verbruikersaanvaarbaarheid van die laevet-, hoëveselgraanproduk met 'n intermedlere-Gl-waarde, gevind nie.
38
Kim, Hansson Anna, and Johanna Barth. "Kusin Vitamin : En studie om vitaminförpackningars olika attribut." Thesis, Södertörns högskola, Institutionen för samhällsvetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-27708.
Full textAbstract:
Syfte: Syftet med studien är att undersöka vilka förpackningsrelaterade attribut som utgör en tilltalande vitaminförpackning. Metod: Studien lutar sig på en kvalitativ metod och för att få fram material som svarar på syftet har intervjuer med åtta stycken respondenter genomförts. Slutsats: De slutsatser som dragits är att mellanstora rundade förpackningar medskruv/”plopp”-lock föredras samt att blått och grönt är attraktiva färger för vitaminförpackningar. Tydlig, både innehålls- och utformningsmässig, information är även av stor vikt.Purpose: The purpose of this study is to investigate which packaging attributesthat make an appealing vitamin package Method: The study uses a qualitative method and eight in-depth interviews withconsumers have been made in order to gain knowledge about the subject. Conclusion: The conclusions that have been made are that rounded medium sizedpackages with screw cap or “plop-lids” are preferred and that the colours blue andgreen are attractive when it comes to vitamin packages. Distinct informationpresented in a clear manner is also important.
39
Arellano, Maya Adolfo Benjamin 1965. "Development of a transnational competency network architecture for packaging engineering within an office products corporation using virtual teams principles." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/91764.
Full text
40
Tudorica, Carmen-Mirela. "Evaluation of the role of soluble and insoluble dietary fibres in affecting the physico-chemical and nutritional characteristics of cereal and dairy based food products." Thesis, University of Plymouth, 2004. http://hdl.handle.net/10026.1/526.
Full text
41
Dragan, Psodorov. "Uticaj ambalaže i savremenih uslova pakovanja na održivost tradicionalnih pekarskih proizvoda." Phd thesis, Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=111071&source=NDLTD&language=en.
Full textAbstract:
Predmet doktorske disertacije obuhvata izbor ambalažnog materijala i uslova pakovanja, pakovanje tradicionalnog pekarskog proizvoda pite sa sirom, kao i očuvanje proizvoda tokom skladištenja.Polupečene pite sa sirom su proizvedene i pakovane u petoslojne i sedmoslojne polimerne kese, pri atmosferskim i u uslovima modifikovane atmosfere pakovanja, sa dodatkom i bez dodatka sakupljača kiseonika. Nakon pakovanja, pite su skladištene i ispitivane po sledećoj dinamici: 0, 2, 4, 8, 12 i 16 nedelja skladištenja. Izvršena su ispitivanja ambalažnih materijala i ambalaže, kao i upakovanog proizvoda. Tokom ispitivanja ambalažnih materijala i ambalaže određivana su: fizičko-hemijska i strukturna svojstva ambalažnih materijala, barijerna svojstva ambalaže, koncentracija gasova u ambalaži i kvalitet formiranih varova. Ispitivanja upakovanog proizvoda su se odnosila na: fizičko-hemijska svojstva pite sa sirom, senzorska svojstva pite sa sirom i mikrobiološka ispitivanja pite sa sirom.Primenjeni ambalažni materijali su pokazali odgovarajuća fizičko, mehanička i strukturna svojstva. Takođe, oba ambalažna materijala pokazuju dobre barijerne karakteristike na ispitivane gasove. Izračunavanjem ukupne zapremine kiseonika koja može biti propuštena kroz ambalažu tokom skladištenja je utvrđeno da je upotreba sakupljača kiseonika od 100 ml dovoljna da omogući skladištenje pite sa sirom, pakovane u obe vrste ambalaže, u vremenskom periodu od 122 dana (16 nedelja), bez promene koncentracije kiseonika veće od 1%. Analizom koncentracije gasova u ambalaži je utvrđeno da su najmanje oscilacije merenih gasova tokom skladištenja pokazali uzorci pakovani u petoslojne, kao i sedmoslojne kese, u atmosferi vazduha sa dodatkom sakupljača kiseonika. Fizičko-hemijska svojstva (kiselinski stepen, peroksidni broj, sadržaj vlage, aw vrednost) uzoraka pita sa sirom su se menjala tokom skladištenja, zavisno od vrste ambalaže i uslova pakovanja. Period skladištenja utiče na senzorski kvalitet proizvedenih pita sa sirom. Nakon 16 nedelja skladištenja pita sa sirom upakovanih usa sirom kese od petoslojnog i sedmoslojnog ambalažnog materijala, u atmosferskim uslovima, sa dodatkom sakupljača kiseonika, ne dolazi do promena ukupnog broja kvasaca i plesni.Na osnovu ciljeva doktorske disertacije, izvršenih ispitivanja i postignutih rezultata, može se zaklučiti da su predloženi ambalažni materijali, kao i uslovi pakovanja doprineli produženju održivosti tradicionalnog pekarskog proizvoda - pite sa sirom.Primenom barijernih ambalažnih materijala, kombinovanjem atmosferskih uslova pakovanja i sakupljača kiseonika, moguće je skladištiti pite sa sirom u dužem periodu.The subject of doctoral thesis includes the selection of packaging material and packaging conditions, packaging of traditional bakery product phyllo dough pastry with cheese, as well as the preservation of the product during the storage period. Partially baked phyllo dough pastry with cheese have been produced and packed into five and seventh layer polymeric bags, by using atmospheric and modified atmospheric packaging conditions, with and without the addition of the oxygen scavengers. After the packaging, phyllo dough pastries have been stored, and the dynamics of researches has been referred to: 0, 2, 4, 8, 12 and 16 week of storing.Researches of packaging material and the product of packaging have been conducted. Examination of packaging material includes: physicochemical and structural properties, barrier properties, concentration of gases inside the packaging and the quality of welds. Examination of the product of packaging includes: physicochemical properties, sensorial properties and microbiological properties of the phyllo dough with cheese.Applied packaging materials have shown an adequate physical, mechanical and structural performances. Furthermore, both packaging materials have shown good barrier characteristics against examined gases. By the calculation of total oxygen volume, which might penetrate throughout packaging materials during storing period, it can be concluded that the application of 100 ml oxygen scavenger is sufficient to provide the storing of phyllo dough pastry, packed in both packaging materials, during a period of 122 days (16 weeks) without oxygen concentration changes higher than 1%. The analysis of gas concentration in packaging has shown that the smallest oscillations of gas concentration during the storage have been determined inside the packaging of five and seven layer packaging material, in air conditions by using oxygen scavengers.Physicochemical performances (acid number, peroxide value, moisture content and aw value) of the samples vary depending on the packaging material and the packaging conditions, during the storage period. The storage period affects the sensorial quality of phyllo dough pastries. After sixteen weeks of storage, phyllo dough pastry with cheese, packed into five and seven layer packaging material, in air atmosphere, with the addition of oxygen scavenger, did not show the increase of the total number of yeasts and molds.Based on the goals, conducted research and results obtained, it might be concluded that suggested packaging materials, as well as the packaging conditions contribute to the additional sustainability of traditional bakery product - phyllo dough pastry with cheese. By the application of barrier packaging material, and combining the atmosphere packaging conditions and the oxygen scavenger it is possible to store phyllo dough pastry for a longer period.
42
Clark, Elizabeth A. "Application of Automated Facial Expression Analysis and Facial Action Coding System to Assess Affective Response to Consumer Products." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/97341.
Full textAbstract:
Sensory and consumer sciences seek to comprehend the influences of sensory perception on consumer behaviors such as product liking and purchase. The food industry assesses product liking through hedonic testing but often does not capture affectual response as it pertains to product-generated (PG) and product-associated (PA) emotions. This research sought to assess the application of PA and PG emotion methodology to better understand consumer experiences. A systematic review of the existing literature was performed that focused on the Facial Action Coding System (FACS) and its use to investigate consumer affect and characterize human emotional response to product-based stimuli, which revealed inconsistencies in how FACS is carried out as well as how emotional response is inferred from Action Unit (AU) activation. Automatic Facial Expression Analysis (AFEA), which automates FACS and translates the facial muscular positioning into the basic universal emotions, was then used in a two-part study. In the first study (n=50 participants), AFEA, a Check-All-That-Apply (CATA) emotions questionnaire, and a Single-Target Implicit Association Test (ST-IAT) were used to characterize the relationship between PA as well as PG emotions and consumer behavior (acceptability, purchase intent) towards milk in various types of packaging (k=6). The ST-IAT did not yield significant PA emotions for packaged milk (p>0.05), but correspondence analysis of CATA data produced PA emotion insights including term selection based on arousal and underlying approach/withdrawal motivation related to packaging pigmentation. Time series statistical analysis of AFEA data provided increased insights on significant emotion expression, but the lack of difference (p>0.05) between certain expressed emotions that maintain no related AUs, such as happy and disgust, indicates that AFEA software may not be identifying AUs and determining emotion-based inferences in agreement with FACS. In the second study, AFEA data from the sensory evaluation (n=48 participants) of light-exposed milk stimuli (k=4) stored in packaging with various light-blocking properties) underwent time series statistical analysis to determine if the sensory-engaging nature of control stimuli could impact time series statistical analysis of AFEA data. When compared against the limited sensory engaging (blank screen) control, contempt, happy, and angry were expressed more intensely (p<0.025) and with greater incidence for the light-exposed milk stimuli; neutral was expressed exclusively in the same manner for the blank screen. Comparatively, intense neutral expression (p<0.025) was brief, fragmented, and often accompanied by intense (albeit fleeting) expressions of happy, sad, or contempt for the sensory engaging control (water); emotions such as surprised, scared, and sad were expressed similarly for the light-exposed milk stimuli. As such, it was determined that care should be taken while comparing the control and experimental stimuli in time series analysis as facial activation of muscles/AUs related to sensory perception (e.g., chewing, smelling) can impact the resulting interpretation. Collectively, the use of PA and PG emotion methodology provided additional insights on consumer-product related behaviors. However, it is hard to conclude whether AFEA is yielding emotional interpretations based on true facial expression of emotion or facial actions related to sensory perception for consumer products such as foods and beverages.Doctor of Philosophy
Sensory and consumer sciences seek to comprehend the influences of sensory perception on consumer behaviors such as product liking and purchase. The food industry assesses product liking through consumer testing but often does not capture consumer response as it pertains to emotions such as those experienced while directly interacting with a product (i.e., product-generated emotions, PG) or those attributed to the product based on external information such as branding, marketing, nutrition, social environment, physical environment, memories, etc.( product-associated emotions, PA). This research investigated the application of PA and PG emotion methodology to better understand consumer experiences. A systematic review of the existing scientific literature was performed that focused on the Facial Action Coding System (FACS), a process used determine facially expressed emotion from facial muscular positioning, and its use to investigate consumer behavior and characterize human emotional response to product-based stimuli; the review revealed inconsistencies in how FACS is carried out as well as how emotional response is determined from facial muscular activation. Automatic Facial Expression Analysis (AFEA), which automates FACS, was then used in a two-part study. In the first study (n=50 participants), AFEA, a Check-All-That-Apply (CATA) emotions questionnaire, and a Single-Target Implicit Association Test (ST-IAT) were used to characterize the relationship between PA as well as PG emotions and consumer behavior (acceptability, purchase intent) towards milk in various types of packaging (k=6). While the ST-IAT did not yield significant results (p>0.05), CATA data produced illustrated term selection based on motivation to approach and/or withdrawal from milk based on packaging color. Additionally, the lack of difference (p>0.05) between emotions that do not produce similar facial muscle activations, such as happy and disgust, indicates that AFEA software may not be determining emotions as outlined in the established FACS procedures. In the second study, AFEA data from the sensory evaluation (n=48 participants) of light-exposed milk stimuli (k=4) stored in packaging with various light blocking properties underwent time series statistical analysis to determine if the nature of the control stimulus itself could impact the analysis of AFEA data. When compared against the limited sensory engaging control (a blank screen), contempt, happy, and angry were expressed more intensely (p<0.025) and consistently for the light-exposed milk stimuli; neutral was expressed exclusively in the same manner for the blank screen. Comparatively, intense neutral expression (p<0.025) was brief, fragmented, and often accompanied by intense (although fleeting) expressions of happy, sad, or contempt for the sensory engaging control (water); emotions such as surprised, scared, and sad were expressed similarly for the light-exposed milk stimuli. As such, it was determined that care should be taken as facial activation of muscles/AUs related to sensory perception (e.g., chewing, smelling) can impact the resulting interpretation. Collectively, the use of PA and PG emotion methodology provided additional insights to consumer-product related behaviors. However, it is hard to conclude whether AFEA is yielding emotional interpretations based on true facial expression of emotion or facial actions related to sensory perception for sensory engaging consumer products such as foods and beverages.
43
Obamehinti, Johnson Muftau. "Effect of treating corn stover with aqueous ammonia and urea on nutritional value." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45904.
Full textAbstract:
Experiments were conducted to study the effect of treatment of rectangular bales of corn stover with aqueous ammonia and urea solutions. The stacks were covered with polyethylene sheets for 129 d, after which they were uncovered, aerated and sampled for laboratory analyses.
Master of Science
44
Roth, Magdalena [Verfasser], Thomas [Akademischer Betreuer] Becker, Michael [Gutachter] Rychlik, and Thomas [Gutachter] Becker. "Valorizing food byproducts: Distiller’s grains and its potential as functional ingredient for cereal based food products / Magdalena Roth ; Gutachter: Michael Rychlik, Thomas Becker ; Betreuer: Thomas Becker." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1213025826/34.
Full text
45
Hernandez, Fanny. "Spéciation du chrome dans les produits céréaliers et les produits laitiers par couplage HPIC/ICP-MS et impact en termes d'évaluation du risque sur la santé du consommateur." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1015.
Full textAbstract:
Le chrome (Cr) est un métal largement distribué sur la croûte terrestre. Les formes les plus couramment rencontrées sont le Cr (III), longtemps considéré comme un nutriment essentiel à la vie et le Cr(VI), cancérigène avéré pour l’homme. La source majeure d’exposition de la population au chrome total étant l’alimentation, des données en spéciation sont nécessaires afin d’évaluer le risque relatif à l’ingestion de chrome. La première partie de ce mémoire présente de façon générale la problématique du chrome. La deuxième partie a été consacrée à l’optimisation d’une méthode de séparation des espèces du chrome. La méthodologie des plans d’expériences a permis en un minimum d’essais d’évaluer l’influence des différentes facteurs et de leurs interactions afin de déterminer les conditions de séparation optimales. La troisième partie porte sur la mise au point d’une méthode d’extraction sélective du Cr(VI) dans les produits laitiers et céréaliers, par plan d’expériences également. Une étude de la correction des interférences et des inter conversions a également été réalisée démontrant de la justesse de la méthode. La méthode a ensuite été validée selon l’approche du profil d’exactitude et appliquée à l’analyse de 65 échantillons de produits laitiers et céréaliers ; aucune trace de Cr(VI) n’a été détectée. La quatrième partie présente le développement d’une méthode d’analyse sélective du Cr(III) dans les produits laitiers. Les performances de la méthode ont ensuite été évaluées avant son application à des échantillons réels. Les résultats confirment que le chrome total présent dans ces matrices serait bien sous forme de Cr(III). Il serait nécessaire de poursuivre ces travaux sur d’autres matrices afin de pouvoir estimer l’ensemble de l’exposition des consommateurs et de mieux évaluer les risques inhérents à la présence de chrome dans les aliments, selon sa forme présenteChromium (Cr) is a metal widely distributed throughout the Earth’s crust. Most commonly forms found are Cr(III), which has long been considered as an essential nutrient for human health, and Cr(VI) which is carcinogenic to humans. The most important contribution to the overall exposure of total chromium in general population is through food. To improve risk assessment on the presence of chromium, there is a need to accurately determine the content of Cr(III) and Cr(VI) in food. The first part of this work focuses on the issue of chromium. The second part deals about the optimization of a separation method for chromium species. Experimental design allowed us to study effects of factors and their interactions in order to determine the best analytical conditions. Third part is the development and validation of selective alkaline extraction for Cr(VI) in dairy and cereal products, also using experimental design. A study of the correction of the interferences and of interconversions is also presented showing the accuracy of the method. Analytical performances were assessed by the accuracy profile method and the method was used to determine Cr(VI) in 65 samples of dairy and cereal products ; Cr(VI) was not detected in these samples. The last part is devoted to develop a selective determination method for Cr(III) in dairy products. Analytical performances of the method were assessed before its use to determine Cr(III) in dairy products samples. Results confirm that chromium in those matrices will be Cr(III). It would be interesting to continue this work in order to study other matrices to better assess consumer exposure and to improve risk assessment related to the presence of chromium in food, depending on its speciation
46
Espinel, Ruth Karina. "Promoting oxygenation of vacuum packaged fresh pork using soybean leghemoglobin." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-10062009-020144/.
Full text
47
Dall'Osso, Nicolò. "Shelf Life Assessment of Fresh Poultry Meat Packaged in Novel Bionanocomposite of Chitosan Incorporated with ZnO nanoparticles synthesized using food industry by-products." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20653/.
Full textAbstract:
Nel settore alimentare viene utilizzata un’elevata quantità di materie plastiche per conservare i prodotti e facilitarne la distribuzione. L’utilizzo di questi polimeri ha un costo ambientale piuttosto elevato, per questo trovare surrogati ecosostenibili diventa sempre più importante.
In questa tesi abbiamo testato l’efficacia del confezionamento di un prodotto altamente deperibile, quale carne di pollo, con un biofilm a base di chitosano. Il chitosano è polisaccaride largamente presente in natura, dotato di caratteristiche chimico-fisiche che permettono l’ottenimento di un film con proprietà meccaniche e di barriera simili ai polimeri tradizionali, oltre a possedere attività antibatterica. Abbiamo realizzato film contenenti chitosano e altri biocomposti, quali montmorillonite, nanoparticelle di ossido di zinco e olio essenziale di rosmarino, per un totale di 6 film con diversa composizione. Tramite analisi microbiologiche e chimico-fisiche abbiamo confrontato l’efficacia dei diversi film prodotti rispetto ad un controllo (carne conservata in un contenitore asettico). Le analisi sono state svolte in doppio, a 0, 3, 7, 10, 15 giorni di conservazione ad una temperatura di 4°C. In diversi film abbiamo ottenuto una riduzione significativa rispetto al controllo (p<0,05) della conta totale dei microrganismi mesofili aerobici (TMAM) e delle Enterobacteriaceae. La rilevazione del pH e dell’acidità titolabile ha fornito risultati in linea a quelli microbiologici. I campioni nel biofilm hanno spesso subito una variazione significativa (p<0,05) dell’umidità rispetto al controllo, a causa dell’elevata permeabilità al vapore acqueo. L’analisi dei TBARS non ha spesso riportato differenze significative rispetto al controllo (p>0,05), e quando presenti, è perché il campione era più ossidato del controllo (p<0,05). Invece, è stato ottenuto un miglioramento significativo (p<0,05) dello Hue angle tra i film e il controllo. I risultati ottenuti forniscono le basi per studi aggiuntivi.
48
Dohlen, Sophia [Verfasser]. "Assessment of a novel active packaging material to improve the resource efficiency of food production by increasing the safety and shelf life of perishable products / Sophia Dohlen." Bonn : Universitäts- und Landesbibliothek Bonn, 2016. http://d-nb.info/112459079X/34.
Full text
49
Alves, Susana Maria de Almeida Paiva Penedo. "Desenvolvimento de um novo produto à base de alheira : snack de alheira : caracterização nutricional e determinação da vida útil dos snacks embalados em aerobiose e em atmosfera protetora." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2017. http://hdl.handle.net/10400.5/14049.
Full textAbstract:
Dissertação de Mestrado em Segurança AlimentarEste trabalho teve como objetivo o desenvolvimento de um novo produto à base de alheira, um enchido tradicional fumado, produzido essencialmente no Norte de Portugal, Trás-os-Montes. Pretendeu-se valorizar um produto de salsicharia tradicional e adaptá-lo a um novo padrão de consumo, mais próximo da “fast food”. Os snacks foram produzidos a partir de massa de alheira, carne de suíno e carne de aves, trituradas e adicionadas de diversos ingredientes nomeadamente, sal, alho, colorau e mistura de aditivos. Foram realizadas três formulações diferentes, em dias de trabalho diferentes, as quais, foram sujeitas a prova de preferência utilizando um questionário baseado numa escala Just about right. Duas formulações de snacks foram escolhidas (snacks de alheira e snacks de mistura) para determinação do prazo de validade, sendo os mesmos embalados em atmosfera protetora (30%CO2/70%N2) e aerobiose, e armazenados 45 dias em refrigeração (+4 °C). Efetuou-se a análise nutricional e determinou-se o tempo de vida útil dos snacks através da contagem de indicadores microbiológicos (microrganismos Aeróbios totais a 30 ºC, Bactérias ácido-lácticas, Enterobacteriacea, Bolores e Leveduras), bem como determinações físico-química (TBA, pH, aw) em 4 períodos: T0, T15, T30 e T45. Ao longo dos dias de armazenamento houve uma tendência para um ligeiro aumento da acidez dos snacks nas duas formulações e nas duas condições de acondicionamento, tendo os snacks de alheira no final dos 45 dias de armazenamento um pH de 5,63±0,32 e os snacks de mistura um pH de 5,52±0,30. Os valores de aw e TBA não foram influenciados pelo modo de acondicionamento, nem sofreram alterações significativas ao longo do tempo. A contagem de Enterobacteriacea nos novos snacks desenvolvidos foi satisfatória durante os 45 dias de armazenamento, exceto nos snacks de mistura em aerobiose que atingiram valores não satisfatórios (4,2 log ufc/g) ao 30º dia de armazenagem. A embalagem dos snacks em atmosfera protetora revelou ser favorável inibindo a multiplicação de leveduras nas duas formulações (snack de alheira e snack de mistura). Nas condições de embalagem em atmosfera protetora estabeleceu-se um prazo de validade de 45 dias para a comercialização de ambas as formulações (snacks de alheira e snacks de mistura).
ABSTRACT - This work aims to develop a new product based on “alheira”, a sausage traditional smoked, produced essentially in Northern of Portugal, Trás-os-Montes. The objective was to obtain the approval of a new product and its adaptation to a new pattern of consumption, closer to fast food. The snacks were produced from alheira mass, pork and poultry meat, crushed and various ingredients were added such as salt, garlic, paprika and additive mixture. Three different formulations were performed on different working days, which were preferably tested using a questionnaire based on a “Just about right” scale. Two snacks formulations were chosen (alheira snack and mixed snack) to determine shelf-life, packaged under protective atmosphere (30% CO2 / 70% N2) and aerobiosis, and storage at + 4 ºC. Their nutritional analysis was carried out and snacks shelf life was determined by microbiological indicators evaluation (total aerobes at 30 ºC, lactic acid bacteria, enterobacteriaceae, molds and yeasts), as well as physicochemical determinations (TBA, pH, aw), in 4 periods: T0, T15, T30 and T45. During storage there was a slightly acidity increase in alheira snacks and mixed snacks packaged under protective atmosphere and aerobiosis. At the end of storage (45 days), the alheira snacks had a pH of 5.63 ± 0.32 and the mixed snacks had a pH of 5.52 ± 0.30. The aw and TBA values were not influenced by the packaging mode, neither along the storage time. Enterobacteriaceae results obtained in the new snacks were satisfactory during storage except in the aerobic package mixed snacks that reached unsatisfactory values (4.2 log ufc / g) after 30 storage days. The packaging of snacks in protective atmosphere was favourable, inhibiting yeasts multiplication in the two formulations (alheira snack and mixed snack). In a protective atmosphere packaging conditions, a shelf life of 45 days was established for the commercialization of both formulations (alheira snacks and mixed snacks).
N/A
50
Cordeiro, Daniela. "Propriedades tecnológicas e aceitação sensorial de produtos cárneos empanados com alto teor de grãos inteiros, farinhas, farelos e flocos de cereais." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255087.
Full textAbstract:
Orientador: Marise Aparecida Rodrigues PollonioTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
Made available in DSpace on 2018-08-17T11:58:29Z (GMT). No. of bitstreams: 1 Cordeiro_Daniela_D.pdf: 9752486 bytes, checksum: 1343a77b6ab10d733d82260785e2a659 (MD5) Previous issue date: 2011
Resumo: Atualmente os consumidores estão cada vez mais interessados no consumo de alimentos com apelos para a promoção da saúde. No desenvolvimento de produtos cárneos com características funcionais, os cereais, os quais possuem uma grande proporção de fibra insolúvel, têm vantagens fisiológicas e tecnológicas por serem constituídos principalmente de celulose. Destacam-se a capacidade de ligação de água e gordura e também a capacidade de reduzir custos de formulação. Sob este aspecto, este trabalho teve o objetivo de estudar e desenvolver formulações de produtos cárneos reestruturados empanados com alto teor de grão inteiro, farinhas, farelos e flocos de cereais integrais garantindo suas características tecnológicas e sensoriais. Primeiramente, foi realizada a seleção e avaliação das propriedades tecnológicas de diferentes cereais para combiná-los na forma de blends de cereais, através de analise físicoquímica e sensorial. A seguir, foi realizado o estudo do efeito da adição de diferentes blend de cereais (6% a 24%) em produto cárneo reestruturado empanado com avaliação das propriedades tecnológicas através da metodologia de superfície de resposta. Foram estudadas como variáveis respostas: umidade, absorção de óleo, textura, cor, bem como a qualidade sensorial geral e os atributos de aparência, cor interna e externa, textura e em especial crocância e sabor. Finalmente, foi estudada a influência dos métodos de cocção (fritura em óleo, forno convencional e forno microondas) sobre empanados de frango adicionados de sete tipos de cereais integrais. A seleção dos cereais e elaboração dos blends com sete tipos de cereais resultaram em teores adequados de proteínas (14,52%), lipídeos (10,39%) e carboidratos (62,72%) e um bom índice de capacidade de retenção de água (4,8). Nos produtos empanados a menor absorção de óleo foi para a formulação com 15% blends. A adição de até 24% de cereais integrais resultou num bom desempenho de textura e cor objetiva para os produtos empanados fritos. Em produtos empanados pré-fritos, houve um aumento na intensidade da cor amarela devido à adição dos blends de grãos e farinhas. Do ponto de vista sensorial os empanados adicionados de sete tipos de cereais integrais apresentar 97% de aceitação e 91% de intenção de compra pelo painel de consumidores, não diferindo da formulação controle. Os produtos submetidos ao forno microondas com 0% e 15% de cereais integrais, obtiveram os maiores porcentuais de umidade e lipídeos em comparação aos produtos cozidos em forno convencional, maior luminosidade e menor intensidade de vermelho, menor força de cisalhamento e as menores notas atribuídas pelos provadores em todos os atributos sensoriais, caracterizando um produto úmido, flácido, claro e sem crocância. Este trabalho permitiu a elaboração de um produto cárneo reestruturado empanado com alto teor de cereais integrais com boa aceitação sensorial, sendo necessários mais estudos para otimizar a substituição do processo de fritura por forneamento ou cocção em microondas
Abstract: Currently consumers are increasingly interested in food consumption with appeals for the promotion of health. In the development of meat products with functional features, cereals, which have a high proportion of insoluble fiber, have physiological and technological advantages because they are made primarily of cellulose. In this respect, this work was to study and develop formulations restructured breaded meat product with high content of whole grain, flour, bran and flakes, cereals and ensuring their sensory acceptance and technological. First, we performed the selection and evaluation of technological properties of different cereals and combine them in the form of blends of cereals, through physicalchemical analysis and sensory acceptance. Next, we performed a study of the effect of adding different blend of cereals (6% to 24%) in restructured breaded meat product and technological properties evaluation by response surface methodology. Were studied as variables response: moisture, oil absorption, texture, color sensory acceptance and appearance attributes, external and internal color, texture, flavor and crispness. Finally, we studied the influence of cooking methods (frying in oil, conventional oven and microwave oven) on breaded chicken added seven types of grains. The selection of grains and the blends with seven types of grain resulted in adequate levels of protein (14.52%), lipid (10.39%) and carbohydrate (62.72%) and a good index of holding capacity water (4.8). Breaded products the oil absorption was lower for the formulation with 15% blends. The addition of up to 24% of grains resulted in a good performance color and texture to the breaded products fried. In breaded pre-fried products, an increase in color saturation due to the addition of the blends of grains and flours. From the standpoint of the sensory the breaded products added seven types of grains presented 97% acceptance and 91% of purchase intention by the consumer panel did not differ from the control formulation. The products subject to the microwave oven at 0% and 15% whole grains, had the highest percentage of moisture and lipids in comparison to products cooked in conventional oven, greater brightness and low saturation yellow, lower shear force and lower scores by the judges in all sensory attributes, configuring in a product moist, flabby, clear and without crunchiness. This work allowed the preparation of a breaded restructured meat product with high content of whole grains with good sensory acceptance, more research is needed to optimize the replacement of the frying in the baking or microwave oven
Doutorado
Engenharia de Alimentos
Doutor em Tecnologia de Alimentos