Lipids 4 Flashcards
1
Q
What are the factors affecting autoxidation
A
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
2
Q
Factors affecting the efficiency of antioxidant
A
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
3
Q
What arr the ideal antioxidants
A
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
4
Q
What arr the types of antioxidants and give examples
A
Natural antioxidants: tocopherol, nordihydroguaretic acid, sesamol and gossypol
Synthetic antioxidants: BHA, BHT, PG, TBHQ
