Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Vitamin D metabolites"”.
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Association of Differing Qatari Genotypes with Vitamin D Metabolites
… association between Qatari genotypes and vitamin-D deficiency and diabetes complications. Through next-generation exome sequencing three major genetic Qatari genotypes were determined, Q1 - Bedouin, Q2 - Persian-South Asian and Q3 - African. The hypothesis was that Qatari genotypes would …
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Changes of parathyroid hormone and vitamin D metabolites according to glomerular filtration rate in chronic kidney disease patients
… m2 and non-dialysed and had not received any vitamin D compounds. eGFR was calculated by simplified MDRD (Modification of Diet in Renal Disease study) equation. Blood samples were collected for serum creatinine, calcium, phosphate, intact PTH, 25-hydroxyvitamin D (25(OH)D3) and …
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Comparing diene derivatisation methods of dry blood spot samples for vitamin D metabolites quantification by liquid chromatography-tandem mass spectrometry
… in the quantification of biologically active vitamin D metabolites in limited volume serum and dry blood spot samples (DBS) using the liquid chromatography tandem-mass spectrometry (LC-MS/MS) analytical technique. This manuscript describes in detail the development and validation of an …
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Natural Genetic Variation Affecting Calcium Homeostasis
… Ca and increases renal conversion of 25 hydroxyvitamin D (25(OH)D) to 1,25 dihydroxyvitamin D (1,25(OH)2D). 1,25(OH)2D acts through the vitamin D receptor (VDR) to increase intestinal Ca absorption, renal Ca reabsorption and skeletal Ca resorption. Efficient intestinal Ca absorption, especially …
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Nutrition and Physical Activity Cancer Prevention Guideline Adherence and Association with Circulating Concentrations of Vitamin D and Precancerous Lesions
… associated with circulating concentrations of vitamin D metabolites. These associations suggest that adherence to the ACS guidelines may be related to improved vitamin D status. This dissertation sought to 1) synthesize the evidence from published prospective cohort studies regarding adherence …
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Vitamin D during Pregnancy
Vitamin D plays an important role in promoting healthy pregnancy and fetal development. There is a lack of knowledge on (1) the effect of vitamin D deficiency/ insufficiency on pregnancy and neonatal outcomes, (2) the association between maternal plasma vitamin D concentration and dietary intake, …
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Applications of Disposable Pipette Extraction for Analysis of Drugs of Abuse Vitamin D Metabolism Testosterone and Inborn Errors of Metabolism by Gas and Liquid Chromatography/mass Spectrometry
… extraction) resin. The method analyzed all major vitamin D metabolites including the frequently-ignored but important and tough structural isomer of 25-hydroxyvitamin D3. DPX extraction efficiency was high with over 90% recovery. Intra-day and inter-day precisions are less than 5% even at the …
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Vitamin D as a measure of health throughout the lifecycle
Vitamin D deficiency is a common occurrence globally and in particular, in at risk populations such as young children, pregnant women and the elderly. This is mainly due to the lack of natural dietary sources of vitamin D and the limited cutaneous production of vitamin D3. Vitamin D has been …