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Niacin (vitamin B3)
Though niacin or nicotinic acid has been known to the organic chemists since 1867 and Funk isolated it from yeast and rice polishing in order to identify the anti-beriberi vitamin in 1913, it was finally isolated as nicotinamide from liver by Elvehjem and his co-workers in 1937. This was actually after the discovery by Rum and Smith in 1934 that the crude extract of liver was effective against pellagra (you might know that pellagra is the disease condition caused due to the deficiency of niacin in the body)
Sterols- steroids containing an alcoholic group at C-3 position and a side chain of 8 to 10 carbon atoms at c-17
Which is the largest reef? This is the Great Barrier Reef off the northeast corner of Australia.
Explain the Counter Current Mechanism? What is counter current mechanism? Counter current mechanism is the mechanism by which the kidneys produce osmotically concentrated urine
Define The Large Intestine The large intestine or colon is about five feet long. It begins at the caecum and terminates at the rectum and anal canal. It is divided into a numbe
Explain the Orthopnoea and Tachypnoea Orthopnoea: Dyspnoea occurs even at rest in severe cardiac congestive failure. This condition is called orthopnoea. Tachypnoea: It is a
The effect of varying the pH of the yeast solution on the functioning of an enzyme catalase
To show how water rises in fine tubes Make some fine hair or capillary tubes by heating glass tubing in a flame and drawing it out. Cut the tubes and glue them to a piece of c
Mechanics: Another hnch of science which is, perhaps, the greatest contribution of Greek civilisation is mechanics. Mechanics developed out of the necessities of imgation,
how do some flower make there own food
Give a rock name for sample. Note that the colour of this type of rock varies greatly, depending on the abundance of organic matter and iron oxides. Samples are both carbonate rock
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