2006-09-12 14:03:18 · 4 answers · asked by Confused about Chemistry 1 in Science & Mathematics ➔ Biology
Often lipids are found conjugated with proteins or carbohydrates, and the resulting substances are known as lipoproteins and lipopolysaccharides. The fat-soluble vitamins can be classified as lipids. Liposomes are spherical vesicles formed by mixing lipids with water or water solutions. They have found applications in the oral administration of some drugs (e.g., insulin and some cancer drugs), since they retain their integrity until they are broken down by the lipases in the stomach and small intestine.
2006-09-12 20:16:15 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Fats in the narrow sense (i.e. glycerol fatty acid esters) are not counted
among polymers, and neither are natural waxes, even though both contain
alkyl chains with about 6 to over 25 repeat units of "-CH2-". True
polymers like polyethylene have many more repeat units. Formulations of
floor waxes contain synthetic "polyethylene waxes" (molecular mass 3000 to
20'000, see Ullmann's Encyclopedia of Industrial Chemistry, Electronic
Edition, 1999) as well as other polymers as binders or
emulsifiers. "Lipids" is a much broader definition (referring to natural
products) than "fats" and may include Lipoproteins, which are Polypeptides
("polymers of amino acids") with an attached "fatty" endgroup. But even
there, the chain does not consist of identical repeat units.
2006-09-12 21:05:15 · answer #2 · answered by DanE 7 · 1⤊ 0⤋
fatty acids
2006-09-13 00:58:38 · answer #3 · answered by Crushgal 3 · 0⤊ 0⤋
its a fat or oil
2006-09-12 21:08:46 · answer #4 · answered by Evan 2 · 0⤊ 0⤋