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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)
How to make a simple vacuum pump Secure a bicycle or automobile hand pump. Open the pump and delete the piston. Un- screws the bolt that holds the leather washers. Reverse the
what is ecology
To show that expired air contains carbon dioxide The two flasks are linked so that when you breathe by the T piece, all the air bubbles by the lime water in the flasks. One tub
Floating bodies Fill the overflow can with water and let it run out unless the surface is level with the spout. Select a piece of wood that floats half or more submerged in the
To show how water rises by capillarity Colour some water in a shallow dish with ink and touch a blotter to the water surface. Observe how the water increases in the blotter.
Question 1 What are the sources of water pollution? List some measures that can help overcome the problem of water pollution Question 2 Environmental accidents can b
Chemical Evolution The question of how life came into being in the first place still remained unanswered. To find an answer to this question means looking back billions of y
what is another word for 2nd consumers?
a. Which type of ripple marks would you expect to see on the bed of a river? Why? b. Which type would you expect to find on the floor of a standing body of water? Why? c.
broad area of scientific activity
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