NUTR 3210 Lecture Notes - Lecture 10: Canola, Organelle, Chloroform
4 Feb 2017
School
Department
Course
Professor
Document Summary
Soluble in organics, solvents (e. g. ether, chloroform, acetone) Wide variety of structures and functions: 10 000 different lipid species characterized. Concentrated source fo energy: 9 kcal/g. Sources of essential fatty acids: alpha-linoleic acid. Carrier of fat-soluble vitamins (a, d, e, k) Roles in disease development: atheros(cid:272)lerosis, dia(cid:271)etes, o(cid:271)esity et(cid:272) . Saturated: max # h atoms, only single bonds. Unsaturated: missing h atoms, double bonds. Delta system: numbering starts from carboxyl end of fatty acid, 18:2 ^9,12. Omega system: numbering starts from the methyl end of fatty acids, 18:2 n-6 or 18:2 -6. Discovery of essential fatty acids in 1929, george and mildred barr fed rats diets that were completely fat free: stunted growth, lost fur, inflammation and scaly tails. What about humans: 1963: infants fed diets that differed in fat content, diets with <0. 1% linoleic acid had poor growth and thickened dry skin. Essential fatty acids linoleic acid: nuts, seeds, legumes. Alpha linoleic acid: fatty fish, canola oil, almonds etc.
