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.
Synonyms: hypovitaminosis A. Vitamin A was the first vitamin identified and hence given the first letter in the alphabet. Vitamin A (retinol) is a fat-soluble vitamin, present in liver, milk and eggs. Beta carotene and other provitamin carotenoids occur in green leafy and orange/yellow vegetables and fruits.