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Mammals are unable to synthesize omega−3 fatty acids, but can obtain the shorter-chain omega−3 fatty acid ALA (18 carbons and 3 double bonds) through diet and use it to form the more important long-chain omega−3 fatty acids, EPA (20 carbons and 5 double bonds) and then from EPA, the most crucial, DHA (22 carbons and 6 double bonds). [2]
In biochemistry and nutrition, a polyunsaturated fat is a fat that contains a polyunsaturated fatty acid (abbreviated PUFA), which is a subclass of fatty acid characterized by a backbone with two or more carbon–carbon double bonds. [1] [2] Some polyunsaturated fatty acids are essentials.
The evening primrose flower (O. biennis) produces an oil containing a high content of γ-linolenic acid, a type of omega−6 fatty acid.Omega−6 fatty acids (also referred to as ω−6 fatty acids or n−6 fatty acids) are a family of polyunsaturated fatty acids that have in common a final carbon-carbon double bond in the n−6 position, that is, the sixth bond, counting from the methyl end.
Properties of common cooking fats (per 100 g) Type of fat Total fat (g) Saturated fat (g) Monounsaturated fat (g) Polyunsaturated fat (g) Smoke point; Butter: 81 51 21 3 150 °C (302 °F) Canola oil: 100 6–7 62–64 24–26 205 °C (401 °F) Coconut oil: 99 83 6 2 177 °C (351 °F) Corn oil: 100 13–14 27–29 52–54
Included for each food is its weight in grams, its calories, and (also in grams,) the amount of protein, carbohydrates, dietary fiber, fat, and saturated fat. [1] As foods vary by brands and stores, the figures should only be considered estimates, with more exact figures often included on product labels.
This analysis is used to determine the free fatty acid content of fats; i.e., the proportion of the triglycerides that have been hydrolyzed. Neutralization of fatty acids, one form of saponification (soap-making), is a widely practiced route to metallic soaps .
Population average % of food energy [5] Saturated fatty acids: Not more than 11% Polyunsaturated fatty acids: 6.5% Monounsaturated fatty acids: 13% Trans fats: Not more than 2% Total fat: Not more than 35% Non-milk extrinsic sugars: Not more than 11% Intrinsic milk sugars and starch: 39% Total carbohydrates: 50% Fibre as non-starch polysaccharide
Oleic acid has 18 carbons, is found in most animal fats and olive oil, and is a cis-9-monounsaturated fatty acid. C 17 H 33 CO 2 H, IUPAC organization name (Z)-octadec-9-enoic acid, numerical representation 18:1 (9), n-9, molecular weight 282.46, melting point 13.4 °C, specific gravity 0.891. CAS Registry Number 112-80-1.