Lipids 4
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What are the factors affecting autoxidation
Energy in form of heat and light Catalyst - metals Double bond Enzymes Chemical oxidants Oxygen content and types of oxygen Natural antioxidants Phospholipids Fatty acids Mono and di glycefides Polymers
Factors affecting the efficiency of antioxidant
Activation energy of antioxidants to donate hydrogen should be low Oxidation potential should be high Reduction potential should be low Stability to ph and processing Solubility in oil should be high
What arr the ideal antioxidants
No harmful physiological effects Not contribute an objectionable flavor, odor, or color to the fat Effective in low concentration Fat soluble Readily available Economical Not absorbable by the body
What arr the types of antioxidants and give examples
Natural antioxidants: tocopherol, nordihydroguaretic acid, sesamol and gossypol Synthetic antioxidants: BHA, BHT, PG, TBHQ