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Unformatted text preview: R, R, R = long chain alkyl groups Can be saturated or unsaturated Double bonds almost always cis (Z) cis-Fatty acids are kinked, which prevents tight packing of triglycerides containing them. This is why triglycerides with lots of unsaturated fatty acids tend to be oils. Autoxidation of Unsaturated Lipids (15.11 and 15.12) Unsaturated chains susceptible to autoxidation at allylic carbons This leads to spoiling of foods containing triacyl glycerols, and contributes to biological ageing. 3 (Aut)oxidation of Unsaturated Lipids (Fig. 15.8) o A lipid o A natural phenolic anti-oxidant (Radical chain terminator) o Obtained from vegetable oils, nuts and seeds (including whole grains) Vitamin E Synthetic Phenolic Anti-Oxidants B utylated H ydroxy T oluene (BHT) B utylated H ydroxy A nisole ( BHA) t ert-B utyl H ydro q uinone (TBHQ)...
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- Spring '11
- Organic chemistry