Before you buy materials, choose the location for your built-in cabinet and cut the hole. Then you can adjust the dimensions if your wall studs arenât exactly 14-1/2 in. apart. Remember, your walls are full of pipes, wires and ducts, so you need to do a little detective work to find a good spot.
Vitamin A Elmer V. McCollum and M. Davis discovered vitamin A during 19121914. In 1913, Yale researchers, Thomas Osborne and Lafayette Mendel discovered that butter contained a fat-soluble nutrient soon known as vitamin A. Vitamin A was first synthesized in 1947.
Who Discovered Vitamin C. 14 Jun, 2011 Who discovered 0. Vitamin C, also known as ascorbic acid, is a well known vitamin that aids in the support of the immune system and can be found in all citrus fruits. It forms an important protein that is used to make skin, tendons, ligaments and blood vessels.