polyunsaturated fatty acid

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Related to polyunsaturated fatty acid: monounsaturated fatty acid, PUFA

polyunsaturated fat

A saturated fatty acid (i.e., an alkyl-chain fatty acid) with two or more ethylenic carbon–carbon double bonds; because of the double bond, not every carbon is saturated with hydrogen atoms—i.e., there are fewer hydrogens—which reduces the strength of the compound's intermolecular forces, resulting in a significant lowering of the compound’s melting point.

Polyunsaturated fats in humans
• Linoleic PFAs—two double bonds between 9/10 (Δ9) and 12/13 (Δ12); e.g., CnH2n-COOH.
• Linolenic PFAs—three double bonds, Δ9, Δ12, Δ15; e.g., CnH2n-5-COOH.
• 4-doubled bond PFAs—four double bonds, Δ5, Δ8, Δ11, Δ14; e.g., arachidonic acid.
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References in periodicals archive ?
Because the polyunsaturated fatty acids have been found to facilitate lipid transportation and metabolism, utilization of oils containing more unsaturated fatty acids like niger seed oil and sunflower oil is recommended to reduce the risk of developing cardiovascular diseases.
Effects of n-3 polyunsaturated fatty acids from seal oils on nonalcoholic fatty liver disease associated with hyperlipidemia.
Calder, "Conversion of [alpha]-linolenic acid to longer-chain polyunsaturated fatty acids in human adults," Reproduction Nutrition Development, vol.
* men in the intervention group significantly increased their intake of polyunsaturated fatty acids, and significantly reduced their intake of saturated fatty acids, cholesterol and mono-unsaturated fatty acids compared with the control group
In many mammalian species, up to 60% of the total fatty acids are long-chain polyunsaturated fatty acids of the n-3 and n-6 series.
Long-chains of polyunsaturated fatty acids, mainly docosahexaenoic acid (DHA) and arachidonic acid, are fundamental constituents of cell membrane phosopholipids.
Dietary intake and cell membrane levels of long-chain n-3 polyunsaturated fatty acids and the risk of primary cardiac arrest.
The odds ratios (95% CI) for the MetS in the 1st, 2nd, 3rd, and 4th quartiles of the n6 polyunsaturated fatty acid class were 1.00, 1.04 (0.68-1.59), 0.51 (0.32-0.81), and 0.35 (0.21-0.59), respectively (P for trend <0.0001).
Of particular nutritional importance are the long-chain polyunsaturated fatty acids, such as the omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA).
Comparison of effects of dietary saturated, monounsaturated, and polyunsaturated fatty acids on plasma lipids and lipoproteins in man.
The team recorded the levels of nutritional long-chain polyunsaturated fatty acid sources in the mother's diet and blood serum, and the levels in the blood of their children by the age of one month.