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Dissertations / Theses on the topic 'Vitamin D in the body'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 July 2024

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1

Logan, Kathryn G. "Seasonal Variation in Vitamin D Levels in Adolescent Girls in Maine." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/LoganKG2003.pdf.

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2

Herselman, Marietjie. "Vitamin D : miracle cure-for-all or cart before the horse?" Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/86816.

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Inaugural address delivered on 2 November 2011<br>Marietjie Herselman was born in the Langkloof, where she matriculated at the McLachlan High School. She obtained a BSc (Physiology and Dietetics) degree at Stellenbosch University and for the next 18 years worked as a dietitian at Tygerberg Hospital, where she specialised in renal nutrition. She obtained a master’s degree in nutrition in 1985 and in 1991 was appointed as a lecturer in the Department of Human Nutrition, Faculty of Health Sciences, at Stellenbosch University. In the same year she obtained her PhD in nutritional sciences at

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3

Beildeck, Marcy Ellen. "The role of vitamin D and the vitamin D receptor in TCF-4 regulation and silencing of CYP24A1." Connect to Electronic Thesis (CONTENTdm), 2009. http://worldcat.org/oclc/454140383/viewonline.

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4

Billing, Georgia. "Determinants of vitamin D status in mother and infant pairs." Thesis, University of Cambridge, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709059.

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5

Landry, Denise. "Interrelationships Between Vitamin D and Body Mass Index and Waist Circumference in Canada." Thesis, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/24344.

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60 % of Canadians have suboptimal vitamin D (<75 nmol/L) and 25% are obese. Obesity has been reported to be a risk factor for low vitamin D, but there is uncertainty about the magnitude of the association. Linear regression was performed using data from the nationally representative cross-sectional Canadian Health Measures Survey (2007-2009). Height, weight, waist circumference (WC), and vitamin D levels were directly measured. There were 5298 participants aged 6 to 79 years. Using a conservative p value of 0.001, body mass index (BMI) category obese / obese I was positively associated and

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6

Hamill, Matthew. "HIV, body composition, bone and vitamin D status in South African women." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/270410.

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Cross sectional and observational data suggest that HIV-positive individuals and those receiving antiretroviral (ARV) therapy are prone to higher rates of osteoporosis and osteopaenia than HIV-negative individuals. Likewise, HIV-positive individuals often have low vitamin D status. Evidence is emerging more generally of a strong association between HIV infection and poor bone health. There is also evidence that treatment with ARV therapy (ART) and suboptimal vitamin D status may exacerbate this problem (Brown et al, 2006a, 2010). But, to date, causal relationships have not been fully establish

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7

Willis, Kentz S. "Vitamin D status & immune system biomarkers in athletes." Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1798967201&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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8

Natarajan, Radhika. "Vitamin D metabolites inhibit adipocyte differentiation in ₃T₃-L₁ preadipocytes." Connect to this title, 2008. http://scholarworks.umass.edu/theses/164/.

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9

Kaewsakhorn, Thattawan. "Roles of calcitriol and its analog on canine transitional cell carcinoma in vitro and in vivo, and in normal canine prostate tissue explants." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1181937183.

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10

Simões, Fernanda Franco Agapito. "Relação entre adiposidade materna e do recém-nascido com concentrações de vitamina D materna e do cordão umbilical." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/6/6138/tde-03122015-143614/.

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Introdução - A vitamina D desempenha funções na regulação da homeostase do cálcio e fósforo, diferenciação celular, metabolismo de hormônios e regulação do sistema imune. Sua deficiência em crianças pode ocasionar raquitismo, convulsões e insuficiência respiratória. Objetivo - Determinar a relação entre adiposidade materna e do recém-nascido com as concentrações de vitamina D materna e do cordão umbilical. Metodologia - Foram envolvidas 101 mães e seus respectivos recém-nascidos selecionados no Hospital Maternidade Vila Nova Cachoeirinha, São Paulo. A concentração de vitamina D foi determinada

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11

Anderson, Paul Hamill. "The regulation of Vitamin D metabolism in the kidney and bone." Title page, contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09pha5486.pdf.

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Includes bibliographical references (leaves 226-273.) Investigates the regulation of the expression of CYP27B1, CYP24 and vitamin D receptor (VDR) mRNA, both in the bone and in the kidney, with the aim to determine whether the regulation of the vitamin D metabolism in the bone is independent from that in the kidney. The effects of age, dietary calcium and vitamin D status on the expression of these genes in both the kidney and the bone, as well as on a number of biochemical factors known to regulate the renal metabolism of 1,25D, such as PTH, calcium and 1,25D itself, were examined. CYP27B1 mR

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12

Moon, Rebecca Jane. "Antenatal vitamin D supplementation and offspring body composition and muscle strength : a translational approach." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/416626/.

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The in utero environment to which a fetus is exposed might influence body composition and muscle strength in later life. Modulation of this environment could therefore represent an approach to addressing the increasing burden of obesity and sarcopenia. One potential modifiable exposure is vitamin D. The aim of this work was to explore the determinants of maternal serum 25-hydroxyvitamin D [25(OH)D] status in pregnancy and the use of antenatal vitamin D supplementation to improve offspring growth, body composition and muscle strength. The Southampton Women’s Survey (SWS) is a prospective birth

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13

Guenther, Isabel. "The relationship between serum leptin, 25-hydroxyvitamin D₃, and body composition." Connect to this title, 2008. http://scholarworks.umass.edu/theses/196/.

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14

Cavalieri, Vanessa Vicente de Souza. "Perfil de vitamina D e sua associação com adiposidade corporal e resistência à insulina em pacientes com doença renal crônica na fase não dialítica." Universidade do Estado do Rio de Janeiro, 2015. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=9438.

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O termo vitamina D compreende um grupo de hormônios esteróides com ações biológicas semelhantes. O método mais acurado para determinar o estado de vitamina D é através dos níveis plasmáticos de 25 hidroxivitamina D [25(OH)D]. A deficiência de 25(OH)D é considerada um problema de saúde pública, tendo como principal causa à baixa exposição solar, idade avançada e doenças crônicas. A deficiência de 25(OH)D é frequente em pacientes com doença renal crônica (DRC) na fase não dialítica. Estudos têm evidenciado que os níveis séricos de 25(OH)D apresentam associação inversa com adiposidade corporal e

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15

Grages, Monica B. "Relationships Between Serum Cortisol, Vitamin D, Bone Mineral Density, and Body Composition in National Team Figure Skaters." Digital Archive @ GSU, 2013. http://digitalarchive.gsu.edu/nutrition_theses/47.

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Background: Studies have not examined the relationships between serum vitamin D (SVitD), serum cortisol (SCort), bone mineral density (BMD), and body fat percent (BF%) in elite figure skaters. However, studies of non-athletes have found that BMD is inversely related to SCort and directly related to SVitD, and BF% is inversely related to SVitD and directly related to SCort. It was, therefore, the purpose of this study to assess the relationships between SCort, SVitD, BMD, and BF% in elite figure skaters. Methods: U.S. national team figure skaters were assessed at a national training camp durin

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16

Orton, Sarah-Michelle. "Environmental factors in multiple sclerosis susceptibility and outcome : a focus on vitamin D." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670043.

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17

Ousley, Amanda. "Engineering the human vitamin D receptor to bind a novel small molecule: investigating the structure-function relationship between human vitamin d receptor and various ligands." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/39580.

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The human vitamin D receptor (hVDR) is a member of the nuclear receptor superfamily, involved in calcium and phosphate homeostasis; hence implicated in a number of diseases, such as Rickets and Osteoporosis. This receptor binds 1α,25-dihydroxyvitamin D3 (also referred to as 1,25(OH)2D3) and other known ligands, such as lithocholic acid. Specific interactions between the receptor and ligand are crucial for the function and activation of this receptor, as implied by the single point mutation, H305Q, causing symptoms of Type II Rickets. In this work, further understanding of the significant an

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18

Sommerville, Racheal. "Vitamin D Supplements Intake among Americans: National Health and Nutrition Examination Survey 2001-2002, 2003-2004 and 2005-2006." Bowling Green, Ohio : Bowling Green State University, 2010. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1269284002.

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19

Cobb, Jennifer L. "Validation of a Sun-Exposure Questionnaire for Adolescent Girls." Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/CobbJL2001.pdf.

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20

Genaro, Patricia de Souza. "Consumo alimentar e metabolismo mineral e ósseo em mulheres idosas com sarcopenia." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/6/6133/tde-24052010-095200/.

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Introdução a redução da massa muscular esquelética relacionada à idade, denominada sarcopenia, está associada com maior incidência de quedas, fraturas e dependência funcional em idosos. Muitos são os fatores que podem contribuir para o surgimento da sarcopenia, dentre eles a deficiência de vitamina D e a inadequação do consumo alimentar, principalmente a ingestão de proteína. Objetivos investigar a relação da sarcopenia com o consumo alimentar e concentração sérica de 25(OH)D. Métodos Foram avaliadas 200 mulheres acima de 65 anos, sendo 35 com sarcopenia e 165 sem sarcopenia. Avaliou-se a d

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21

Rockell, Jennifer, and n/a. "Serum 25-hydroxyvitamin D concentrations and their determinants in the New Zealand population." University of Otago. Department of Nutrition, 2008. http://adt.otago.ac.nz./public/adt-NZDU20080929.142611.

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Adequate vitamin D status plays an important role in bone health and may also protect against Type 1 Diabetes (T1D), multiple sclerosis and certain cancers. Vitamin D is obtained from two sources; diet and through skin synthesis through the action of ultraviolet (UV) light. Dietary intakes of vitamin D are low in New Zealand (NZ) and the majority of our vitamin D comes from UV exposure. The NZ population may be at risk of low vitamin D status because of low dietary intakes, the country�s latitude (35-46 �S), and high proportion of darker skinned Maori and Pacific People. While case reports hav

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22

Maboshe, Wakunyambo. "Investigating the effects of dietary-derived and sunlight-derived vitamin D3 on markers of immune function." Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=237073.

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Primarily synthesised via cutaneous exposure to solar ultraviolet B (UVB) radiation, serum vitamin D concentrations, measured as 25-hydroxyvitamin D (25(OH)D), fluctuate according to solar availability. Seasonal variations in vitamin D are common in areas of high or low latitude determined by the distance from the sun. Seasonal variations in blood pressure, immune markers and some diseases including influenza, have also been reported. However, the contributions of UVB light or vitamin D on the immune markers have not been fully determined. Against this background, the purpose of this research

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23

White, Samantha. "The relationship of bone health to vitamin D status and body composition in pre-adolescent children (Pretoria, South Africa)." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/65955.

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Introduction: Bone health development and maintenance is important in children to reduce the risk for osteoporosis later in life. Knowledge on the vitamin D and bone health status of preadolescent children in South Africa is limited. Vitamin D and body composition both play important roles in bone health, but the relationship between adiposity and bone mass in children has been debated. The objective of this study was firstly, to describe the bone health status, body composition and vitamin D status of preadolescent children in Pretoria, South Africa. Secondly, the study examined bone health i

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24

Anschütz, Wilma Margarete [Verfasser], and Michael [Akademischer Betreuer] Amling. "Untersuchungen von Einflussfaktoren auf den Body Sway mit besonderer Berücksichtigung des Vitamin D-Spiegels / Wilma Margarete Anschütz. Betreuer: Michael Amling." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2015. http://d-nb.info/1079002197/34.

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25

McAdler, Marisa M. "The Relationship Between Vitamin D Status of Adult Women and Diet, Sun Exposure, Skin Reflectance, Body Composition, and Insulin Sensitivity." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1090.

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As the prevalence of vitamin D deficiency continues to grow, mounting evidence supporting its link with chronic disease strengthens suggesting vitamin D’s candidacy in the prevention and treatment of multiple disease states and their complications. Dietary guidelines, however, do not take sun exposure into account. The present study sought to explore the impact of sun exposure on vitamin D status (serum 25(OH)D), and identify other significant determinants of serum levels which may have the greatest effects on overall health. Participants (n = 34) were pre-menopausal women aged 18 to 50 years

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26

Leonard, Franciska. "Modulation of the intestinal vitamin D receptor and calcium ATPase activity by essential fatty acid supplementation." Diss., University of Pretoria, 1999. http://hdl.handle.net/2263/24269.

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27

Sulistyoningrum, Dian. "The role of vitamin D and adiponectin in ethnic-specific differences in body fat distribution and risk for cardiovascular disease." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42852.

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Background: Body fat distribution, in particular visceral adipose tissue (VAT), contributes to risk of cardiovascular disease (CVD). The Multicultural-Community Health Assessment Trial (M-CHAT) reported that South Asians have greater VAT than Europeans despite similar BMIs, putting them at greater risk of CVD. However, the molecular mechanisms underlying ethnic-specific differences in body fat distribution are unclear. Low circulating 25-hydroxyvitamin D (25OHD) and adiponectin concentrations are prevalent in individuals with obesity (BMI ≥ 30kg/m²), and are associated with increased risk of C

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28

Anschütz, Wilma Margarete Verfasser], and Michael [Akademischer Betreuer] [Amling. "Untersuchungen von Einflussfaktoren auf den Body Sway mit besonderer Berücksichtigung des Vitamin D-Spiegels / Wilma Margarete Anschütz. Betreuer: Michael Amling." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2015. http://nbn-resolving.de/urn:nbn:de:gbv:18-76116.

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29

Sebadelhe, Vittória Regina Rodrigues Jacob. "Relação entre o consumo alimentar habitual de vitamina D, estado nutricional e estilo de vida em todas as faixas etárias de uma mesma população." Universidade Federal da Paraíba, 2015. http://tede.biblioteca.ufpb.br:8080/handle/tede/8812.

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Submitted by Maike Costa (maiksebas@gmail.com) on 2017-02-01T15:13:39Z No. of bitstreams: 1 arquivototal.pdf: 1758046 bytes, checksum: e968ad7641c02183aec5207b275d0343 (MD5)<br>Made available in DSpace on 2017-02-01T15:13:39Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 1758046 bytes, checksum: e968ad7641c02183aec5207b275d0343 (MD5) Previous issue date: 2015-02-17<br>In addition to the importance of vitamin D for bone health, is of great interest to elucidate its relationship with obesity. The objective of this study was to examine the relationship between habitual dietary intake of v

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Davis, Shani Vann. "The Relationship Between Socioeconomic Status and Body Mass Index on Vitamin D Levels in African American Women with and without Diabetes Living in Areas with Abundant Sunshine." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4660.

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OBJECTIVE: To examine the relationships between socioeconomic status (SES), body mass index (BMI), and vitamin D levels in African American (AA) women living in areas with abundant sunshine; and to explore if diabetes moderates these relationships. SIGNIFICANCE: More AA's live in poverty, and experience obesity, diabetes, and chronic disease compared to other groups. Eighty percent of AA women are overweight or obese, and rates of type 2 diabetes is highest in this group. Minority race, obesity, and diabetes increase risks for low vitamin D, and are associated with p DESIGN AND METHOD: A cross

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31

Castillo, Hilda S. "Mutational analysis and engineering of the human vitamin D receptor to bind and activate in response to a novel small molecule ligand." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/39502.

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Nuclear receptors (NRs) are ligand-activated transcription factors that regulate the expression of genes involved in all physiological activities. Disruption in NR function (e.g. mutations) can lead to a variety of diseases; making these receptors important targets for drug discovery. The ability to bind a broad range of 'drug-like' molecules also make these receptors attractive candidates for protein engineering, such that they can be engineered to bind novel small molecule ligands, for several applications. One application is the creation of potential molecular switches, tools that can be us

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32

Elnefily, Rasha. "Determinants of Bone Mineral Density Changes in Women Transitioning to Menopause: A MONET Group Study." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/24264.

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Menopause is an important period for bone health in women. Objective: To assess the determinants of bone mineral density (BMD) changes in women transitioning to menopause. Method: A secondary data analysis of the MONET (Montreal-Ottawa New Emerging Team) study. Outcome measures included yearly assessment of menopause status, body composition, BMD, physical activity energy expenditure (PAEE) and dietary calcium and vitamin D intakes. Results: 84 of the original 102 women had complete data for the purpose of the present study. Repeated measures analysis revealed significant decreases in lumbar

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33

Fosson, Elizabeth Reid. "Relationship Between Total Body Mass, Fat-Free Mass, Fat Mass, and Bone Mineral Density of the Hip In Middle-Age Women: The Roles of Diet, Physical Activity, and Menopause." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3706.

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Objective: This study was conducted to investigate the relationship between hip bone mineral density (BMD), fat free mass (FFM), fat mass (FM), and total body mass (TBM) and the extent to which these relationships were modified by various confounding factors. The cross-sectional analysis included 262 healthy females (mean age 41.6±3.0 years). Methods: BMD of the hip and body composition were assessed by the Hologic 4500W dual energy x-ray absorptiometry (DXA) system. Total and intensity of physical activity (PA) were objectively measured using an Actigraph accelerometer. Dietary calcium and vi

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34

Gailytė, Ieva. "Jaunų sveikų vyrų vitamino D koncentracijos, kūno sandaros, endokrininės ir psichologinės būklės bei gyvenimo kokybės sąsajos." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130611_083433-13656.

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Pastarąjį dešimtmetį nustatyta, kad vitaminas D dalyvauja ne tik skeleto sistemos metaboliniuose procesuose, bet jo trūkumas siejamas ir su įvairiomis kitomis patologinėmis būsenomis, nes daugumoje organizmo ląstelių yra išsidėstę vitamino D receptoriai. Įvertinę šią vitamino D svarbą, epideminio pobūdžio jo trūkumą įvairiose šalyse bei tai, kad iki šiol panašaus pobūdžio mokslinių tyrimų mūsų šalyje neatlikta, nuspendėme įvertinti jaunų vyrų – Lietuvos kariuomenės šauktinių – vitamino D koncentracijos, kūno sandaros, endokrininės, psichologinės būklės ir gyvenimo kokybės rodiklių tarpusavio s

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35

Stawasz, Lydia-Anne. "Vegan and omnivore diets : an examination of dietary intake, body composition, serum lipids, parathyroid and vitamin D hormones, acid-base balance, urinary calcium excretion and bone parameters in pre-menopausal women /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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36

Brenten, Thomas [Verfasser]. "Investigations on age and breed-associated differences in energy intake, growth rate, body composition, haematological and biochemical values of Labrador Retrievers and Miniature Schnauzers fed different dietary levels of vitamin A / Thomas Brenten." Berlin : Freie Universität Berlin, 2016. http://d-nb.info/111088415X/34.

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Oliveira, Maria Beatriz Sobral de. "Avaliação da frequência de doença osteometabólica entre portadores de pancreatite crônica alcoólica e sua correlação com os hábitos alimentares e a composição corporal." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/5/5168/tde-24022016-090200/.

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O tecido ósseo é extremamente complexo que, juntamente com a cartilagem, constitui o sistema esquelético. Tanto os ossos quanto a cartilagem são compostos por tecido metabolicamente ativo com duas funções básicas para o organismo, uma mecânica e outra bioquímica. O impacto do déficit calórico e da perda de peso pode reduzir a massa óssea e mudar a composição corpórea. Na pancreatite crônica alcoólica o paciente relata ingestão alcoólica por longo período, além da referência do alto consumo de cigarros e de uma alimentação deficiente. Os objetivos do presente estudo foram avaliar a frequência d

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Pedrosa-Castro, Marcia Alessandra Carneiro [UNIFESP]. "Efeitos da suplementação com vitamina D e cálcio sobre o metabolismo mineral e sobre parâmetros da função neuromuscular em idosos institucionalizados." Universidade Federal de São Paulo (UNIFESP), 2006. http://repositorio.unifesp.br/handle/11600/21492.

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Made available in DSpace on 2015-12-06T23:44:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2006<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Objetivos: Avaliar os efeitos de 6 meses de suplementação com colecalciferol e cálcio sobre o metabolismo mineral e sobre os parâmetros de força muscular de membros inferiores, oscilação postural e mobilidade funcional. Desenho do Estudo: Ensaio clínico prospectivo, randomizado, duplo-cego, placebocontrolado. Local de realização: Duas instituições

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Vogt, Barbara Perez. "Efeitos da suplementação de vitamina D e treinamento físico aeróbico sobre a função muscular e composição corporal de pacientes em hemodiálise crônica." Botucatu, 2017. http://hdl.handle.net/11449/150250.

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Orientador: Jacqueline Costa Teixeira Caramori<br>Resumo: Background: function and muscle mass depletion is frequent in hemodialysis patients, as well as vitamin D deficiency. Vitamin D supplementation exerts positive effects on muscles, and clinical trials combining vitamin D supplementation and physical training have promoted improvements on functional capacity and muscle quality in elderly. Objective: to assess the effects of vitamin D supplementation and intradialytic aerobic training (IDAT) on biochemical parameters, body composition, and muscle function in patients on maintenance hemodia

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40

Ormarsdóttir, Sif. "Osteoporosis in chronic liver disease." Doctoral thesis, Uppsala University, Department of Medical Sciences, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-660.

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<p>Ormarsdóttir, S. 2001. Osteoporosis in Chronic Liver Disease. Acta Universitatis Upsaliensis. <i>Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine</i> 1037. 60 pp. Uppsala. ISBN 91-554-5021-0. </p><p>Osteoporosis is a well-known and frequently reported complication of chronic liver disease (CLD) with a high fracture rate contributing to significant morbidity after liver transplantation. The pathogenesis is unknown and controversy exists about many risk factors for osteoporosis in CLD. </p><p>In the present thesis, bone mineral density (BMD) was found to be signif

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Lowe, Lorraine Claire. "Vitamin D and the vitamin D receptor in breast cancer." Thesis, St George's, University of London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428038.

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Ellfolk, Maria. "Regulation of Vitamin D 25-hydroxylases : Effects of Vitamin D Metabolites and Pharmaceutical Compounds on the Bioactivation of Vitamin D." Doctoral thesis, Uppsala universitet, Avdelningen för farmaceutisk biokemi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9412.

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A 700bp portion of the promoter of CYP2D25, the porcine microsomal vitamin D 25-hydroxylase was isolated and sequenced. The computer analysis of the sequence revealed the existence of a putative VDRE at 220 bp upstream of the transcription start site. A CYP2D25 promoter-luciferase reporter plasmid was constructed in order to study the transcriptional regulation of the gene. Treatment with the vitamin D metabolites calcidiol and calcitriol suppressed the promoter, provided that the nuclear receptors VDR and RXR were overexpressed. Phenobarbital was also capable of suppressing the promoter if th

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Sultan, Arwa. "Vitamin D and Depression in Women of Reproductive Age: Exploring Women’s Use of Vitamin D and Vitamin Supplements." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/24787.

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Background Vitamin supplements are commonly used in women of reproductive age. There is a range of vitamin supplements such as iron, folate, vitamin B and vitamin D that are used. Deficiencies in vitamin D can result in adverse health outcomes, such as exacerbation of asthma and fractures. Some studies suggest that vitamin D deficiency may be associated with increases in depressive symptoms and severity. These associations need further exploration to ascertain confirmation, with more vigorous research. Furthermore, there has been limited research on the reasons behind vitamin supplement use

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Ke, Liang. "Hypertension and Vitamin D." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/14220.

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The aim of this research was to apply analytical epidemiology to examine associations between hypertension and vitamin D status (serum 25-hydroxyvitamin D (25OHD)). The first objective was to appraise and synthesize the research evidence on the relationship between hypertension and 25OHD. The follow-up objective was to complete a sequence of studies exploring the association between hypertension and 25OHD in two populations with high hypertension and vitamin D deficiency rates, Finland and China. The results of the meta-analysis were that higher vitamin D levels were associated with lower hype

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Clark, W. Andrew. "Falls and Vitamin D." Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etsu-works/2526.

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Clark, W. Andrew. "Falls and Vitamin D." Digital Commons @ East Tennessee State University, 2013. https://dc.etsu.edu/etsu-works/2528.

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Pinnock, Carole B. "Vitamin A status and susceptibility to respiratory illness /." Title page, table of contents and abstract only, 1987. http://web4.library.adelaide.edu.au/theses/09PH/09php656.pdf.

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Mark, Sean. "Vitamin D status and recommendations to improve vitamin D status in Canadian youth." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=92287.

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Little is known regarding the vitamin D status of Canadian youth. Our objectives were: (i) to describe the vitamin D status of Québec youth using a representative sample; (ii) examine the relative contributions of diet, physical activity and fat mass to the variance in plasma 25-hydroxyvitamin D{25(OH)D}, the best biomarker of vitamin D status; and (iii) examine the influence of household income and food insecurity on the intakes of dietary vitamin D, calcium and dairy foods.<br>To describe vitamin D status, we used data from a cross-sectional survey representative of Québec youth aged 9, 13 a

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Mak, Jenson Chun Sum. "Vitamin D replenishment and vitamin D status in functional outcomes following hip fracture surgery." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/13825.

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Background: Older people presenting with hip fractures requiring surgery have a high prevalence of hypovitaminosis D, which is an important modifiable risk factor for falls and fractures. Inadequate sun exposure is the main reason for vitamin D deficiency in older people. Vitamin D supplements, with or without calcium have been shown to reduce falls and fracture risk in this population. Undertreated pain is a risk factor for delirium and a barrier to rehabilitation interventions following a hip fracture. A small number of randomised controlled trials (RCTs) have shown increased 25-OHD levels w

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Antonoglou, G. (Georgios). "Vitamin D and periodontal infection." Doctoral thesis, Oulun yliopisto, 2015. http://urn.fi/urn:isbn:9789526209166.

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Abstract The aim of the present study was to examine associations between serum 25-hydroxyvitamin D [25(OH)D] and 1,25-dihydroxyvitamin D[(1,25(OH)2D]—the circulating and active forms of vitamin D—and periodontal infection. The data were gathered from a case-control study (63 periodontitis patients and 30 periodontally healthy controls) and an intervention study among individuals with type 1 diabetes mellitus (T1DM, 80 patients at the baseline and 65 after periodontal treatment). The periodontal data and the levels of serum 25(OH)D, 1,25(OH)2D and parathyroid hormone (PTH) were available. A th

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