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Define Absorption, Storage and Elimination of ascorbic acid?
Ascorbic acid is rapidly absorbed from the intestines primarily by active transport. Simple diffusion or carrier-mediated transport may also contribute to a small extent of uptake of the vitamin from the mouth and stomach. Prior to absorption, ascorbate may be oxidized to form dehydroascorbate which is absorbed by passive diffusion or by use of glucose transporters. It passes through the portal vein to the general circulation and to all tissues. Each organ or tissue has an optimal saturation level of ascorbic acid. It is not stored to any appreciable extent in the body. The degree of absorption decreases with increased vitamin intake and varies from 16% to 98%, the average overall absorption being about 80% to 95%. Unabsorbed vitamin C may be metabolized by the intestinal flora. Pectin and zinc are a few substances that impair its absorption. Excess is excreted in urine.
Explain the Disadvantages of Colonies Obtained At Different Dilution 1. Heat sensitive microorganisms may be damaged by melted agar, giving low viable count as compared to spre
The rRNA transcription units in E. coli hold some tRNA genes which are processed and transcribed at the time of rRNA transcription. The other tRNA genes happen in clusters of
Read the information found in the Bioethics: Choices for the Future box on page 40 of the text entitled "Should you Bank your Stem Cells?" Based on the information given, discuss
Q. Etiologic factor of diabetes? The precise etiology of diabetes is not known but multiple factors contribute to the disorder. These are reviewed herewith. Type I Diabetes
Q. Physical Signs of mitral regurgitation? Pulse is of normal character but carotid upstroke may be brisk. Atrial fibrillation is often present in a patient with advanced disea
COMMON DISEASE OF SHEEP - 1 . ANTHRAX - Persons working in wool factories may get infection by breathing. 2 . BLACK QURTER 3 . HAEMORRHAGIC S
Flagellates - Parasitic Protozoan Several flagellate protozoa parasitise man and live in the blood stream or tissues of the reticulo-endothelial system. Most significant of th
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Define Dietary modifications in the diet of the elderly? Loss of teeth due to increased decay of teeth and gums is common in aged person. Fitting dentures may also make chewin
Explain Voriconazole It has a spectrum of activity similar to itraconazole but appears to be more active against Aspergillus spp. And some species of Candida, containing C.
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