Extraction of cholesterol from egg chicken

Isolation of Natural Products: Cholesterol
I N T H I S E X P E R I M E N T , Y O U W I L L;

1-Gain experience in the use of several techniques used to isolate chemical substances from their natural sources.
2- Isolate the steroid cholesterol from egg yolk.

I N T R O D U C T I O N:
Living organisms are amazing in their ability to speci?cally and ef?ciently synthesize complicated organic compounds. Many of the familiar organic materials we use daily are natural products, including substances used as (1) favorings (peppermint, spearmint, cinnamon), (2) foods (carbohydrates, fats, proteins), (3) polymers (rubber, cotton, silk), (4) building materials (wood), (5) drugs (penicillin, streptomycin), and (6) vitamins.

Isolation of cholesterol from egg yolk :

Cholesterol is the best known and most abundant steroid in the body. It is a precursor for many of the important naturally occurring steroids, including male and female sex hormones, bile salts, and hormones of the adrenal glands.
The extreme insolubility of cholesterol in water sometimes causes it to come out of solution. In the bloodstream, this process contributes to the hardening of the arteries, and in the gallbladder it leads to the formation of gallstones. Cholesterol isolated from gallstones contains very small amounts of other steroids related to cholesterol.