Linolenic Acid

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linolenic acid

[¦lin·ə¦lin·ik ′as·əd]
C17H29COOH One of the principal unsaturated fatty acids in plants and an essential fatty acid in animal nutrition; a colorless liquid that boils at 230°C (17 mmHg or 2266 pascals), soluble in many organic solvents; used in medicine and drying oils. Also known as 9,12,15-octadecatrienoic acid.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Linolenic Acid


a monobasic carboxylic acid with three isolated double bonds, CH3(CH2CH=CH)3(CH2)7COOH; a colorless oily liquid. Boiling point, 184°C (at 532 newtons per sq m, or 4 mm of mercury); density, 0.905 g/cm3 at 20°C. Linolenic acid belongs to the category of irreplaceable fatty acids; it exists in triglyceride form in many vegetable oils—for example, linseed (up to 30 percent), perilla (up to 55 percent), hemp, and soy.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
An adequate daily intake for adults of alpha-linolenic acid has been established by the U.S.
The findings suggest that "the association between alpha-linolenic acid and risk of prostate cancer may not be a reflection of animal fat intake," he said.
By "essential oil," he is referring to the omega-6 linoleic acid and the omega-3 alpha-linolenic acid. Peskin considers omega-3 supplements containing DHA and EPA "derivatives" of the "parent" omega-3 alpha-linolenic acid (ALA).
The European Journal of Preventive Cardiologyreports the finding of a lower risk of death from cardiovascular disease among men and women with a higher intake of the omega-3 fatty acids EPA and DHA, which are derived from marine sources, and alpha-linolenic acid (ALA), which occurs in plant foods.*
While the good news about omega-3s is widespread, what many people don't realize is that there are two major types: the long chain omega-3s eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), found in fish and fish oil; and the short-chain form alpha-linolenic acid (ALA), found in walnuts, flax, and some vegetable oils.
According to the researchers, walnuts contain alpha-linolenic acid, gamma-tocopherol and phytosterols, which may explain the positive effects of the walnut oil treatment.
Vegetarians can get alpha-linolenic acid, another omega-3 fatty acid, from foods including flaxseeds, flaxseed oil, walnuts, and canola oil.
"Long-Chain Conversion of [13C] Linoleic Acid and Alpha-Linolenic Acid in Response to Marked Changes in their Dietary Intake in Men," J.
Purslance contains more omega-3 fatty acids, alpha-linolenic acid in particular than any other leafy vegetable plant.
In the Jan/Feb issue of Running & FitNews[R] we discussed how, of all nuts, walnuts have the greatest concentration of omega-3 fatty acids and contain more alpha-linolenic acid (ALA) in particular than do other nuts.
The lighter moods might have been associated with higher intakes of another omega-3 fatty acid, alpha-linolenic acid. (Source: Nutrition Journal, 2010; 9[1]:26.)
The link with EPA--the other major omega-3 fat in fish--was weaker, and there was no link with alpha-linolenic acid, the omega-3 fat that's found in soy, canola, and flax oil.