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(pŭf′ə, po͞o′fə, pē′yo͞o′ĕf′ā′)
polyunsaturated fatty acid

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.
References in periodicals archive ?
Effect of PAFU on the ALT change after treatment: Nine studies reported measurements of ALT in PUFA and control groups; however, two of these studies did not provide a standard deviation, therefore seven studies (n=438) were used in the analysis.
Walnuts are unique among nuts because they are primarily comprised of PUFAs, with 13 out of 18 grams of total fat per one ounce serving.
Plasma concentrations of EPA, DHA, and the n-6 PUFA, arachidonic acid (AA), were measured by gas chromatography as previously described [20].
Meat from animals grazed on pasture has desirable nutritional properties and is greatly valued by consumers because of the higher levels of polyunsaturated fatty acids (PUFAs) and lower ratio of n-6 to n-3 PUFAs it has [12-14].
Recently, the positive roles of n-3 PUFAs in bone remodeling and antiosteoporosis have been demonstrated [3,16].
Eicosanoids derived from omega-6 PUFAs are potent proinflammatory mediators, except for lipoxins, which are able to perform local proresolving actions in association with lipid mediators obtained from omega-3 PUFAs [9].
Microbial cultivation can be a profitable approach for VLC- PUFA production due to high productivity per unit area [53].
Oleic acid reduction in ruminant tissues is often associated with PUFA supplementation in the ration [25].
In contrast, the increase of PUFA intake, especially the n-3 PUFA portion, may have a significant impact on the improvement of public health and nutrition.
Pufa Tower next to the Shanghai Stock Exchange, faces the Century Avenue and runs through the central business district of Lujiazui and Bamboo Garden.