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8 Cards in this Set
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Alcohols present in lipid molecules |
1. Glycerol (glycerin) 2. Cholesterol 3. Higher alcohols eg Cety-alcohol (usually found in wax) |
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Glycerol (Structure) |
its a simplest trihydric alcohol It contain 3 hydroxyl group in the molecule |
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Glycerol (properties) |
1. Colurless 2. oily fluid 3. sweetish in taste 4. miscible with water and alchol 5. insoluble in ether |
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Glycerol (sources) |
industrial 1. By product of soap manufacturer 2. from fermentation og glucose by changing conditions in such way asvto decreade Co2 and alcohol formation Physiological 1. Endogenous: Lipolysis if fat in adipose tissue 2. Exogenous: Dietry 22 % abosorbed directly from portal blood of gut |
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Glycerol ( Test) |
Acroline test: detect presence Glycerol when dehydrated with heat and KHSO4 produces "Acryl aldehyde" which has pungent or acrid odour |
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Glycerol ( uses) |
a. Industrial: Pharmaceutical and cosmetics has glycerol in formula b. Medicine Nitroglycerine is vasodilator In Cerebrovascular diseases glycerol therapy reduce edema c. Physiological has definitive nutrition value Can synthesis glucose and glycogen by gluconeogenesis.
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UNSATURATED alcohols |
Many of them are pigments 1. Phytol (phytyl alcohol): constitute of chlorophyll 2. Lycophyll: polyunsaturated dihydroxy alcohol occur in tomatoo as purple pigment 3. Carotene: easily split in the body in the centre to give two alchol, vit A 4. Sphingosine and sphingol: Unsaturated amino alcohol in the body as the constitutent og phospholipids. |
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Steroid and Sterol |
1. found often in the associations wiyh fats 2. Can be separated from fat when fat is Sponified because it occur in unsaponiifiable residue 3. have Phenanthrene ring A,B n C to which cyclopentane ring D is attached called as Cyclo-pentano-perhydro-phenanthrene nucleus 4. Side chain occur typically atvthe positions 10 and 13 constitutingv 19 and 18 carbon chain 5. side chain at 17 is common
STEROL If the compound has one or more OH group and no carbonyl or carboxyl group it is called sterol most important sterol of human is CHOLESTEROL |