1. Petroleum refinery process in which large heavy oil molecules are broken down into smaller ones. If conducted only with the application of heat, it is called thermal cracking. If a catalyst is also used, it is called catalytic cracking. If hydrogen is used in addition to heat and catalysts, it is called hydrocracking. 2. Deciphering of a code or encrypted data.
Vitamin D3 is the form of vitamin D called cholecalciferol. Cholecalciferol is the most widely known of the vitamin D series and is a fat soluble vitamin that is stored to some degree in the body. It is used as a dietary supplement and for the treatment and prevention of vitamin D deficiency.
A: Vitamin D3 or cholecalciferol is a D vitamin that is important for the absorption of calcium from the stomach and for the functioning of calcium in the body.It is used to treat or prevent many conditions caused by a lack of vitamin D, especially conditions of the skin or bones.: Vitamin D is a fat soluble vitamin that is found naturally in very few foods. Food sources of vitamin D include fish, such as tuna, salmon, and mackerel, and fortified foods, such as dairy products including milk, yogurt, and cheese.