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Define about the Metabolism of Selenium compounds?
Selenium compounds' are generally very efficiently absorbed by humans and selenium absorption does not appear to be' under homeostatic control selenium is mainly absorbed from the duodenum. Less absorption occurs in the jejunum and ileum. Inorganic forms of selenium (mainly selenate) are passively transported whereas organic forms are actively transported. Almost 5040% of dietary selenium is absorbed, with efficiency being higher for organic forms, as compared to inorganic.
Among the organic forms, selenomethionine is better absorbed than selenocysteine. Among the inorganic forms, selenales are better absorbed than selenites. For example, absorption of the selenite form of selenium is greater than 80% whereas that of selenium as selenomethionine or as selenate may be greater than 90%. In addition, some dietary factors appear to influence the absorption of the element. Phytates and heavy metals, such as mercury through chelation and precipitation, hinder selenium absorption. Vitamins C, A and E, as well as, glutathione enhance the absorption.
The fact that some pure solutions of hydrocarbons do not readily evaporate at room temperature is a result of- Select one: a. London dispersion forces. b. The hydrophobic
Define Role of Glucose-6-phosphate dehydrogenase - Gene Expression? Glucose-6-phosphate dehydrogenase (G6PD) is another enzyme involved in lipogenesis that is regulated by diet
what are the disadvantages of protozoa?
Glycogen Storage Diseases Glycogen storage diseases are caused by genetic defects that result in deficiencies in certain enzymes of glycogen metabolism. These deficiencie
The Phenomenon of acid rain was first introduced by Rober Angus smith in 1852. Is means presence of excessive acids in rain water? Acid rain is a form of precipitation (rain, sn
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Q. Standard invert sugar solution? Reagents Required 1) Standard invert sugar solution: Weigh accurately 0.985 g of sucrose and dissolve in 500 ml of water. Add 2 ml of
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Explain Properties related to protein-protein interactions? Properties related to protein-protein interactions include dough formation, one of the important functional properti
1. Given a log phase bacterial culture with 1 x 106 cells per ml and a generation time of 20 minutes, how long does it take the culture to reach a density of 6.4 ? 107 cells per ml
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