Linoleic Acid

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linoleic acid

[¦lin·e¦lē·ik ′as·əd]
C17H31COOH A yellow unsaturated fatty acid, boiling at 229°C (14 mmHg), occurring as a glyceride in drying oils; obtained from linseed, safflower, and tall oils; a principal fatty acid in plants, and considered essential in animal nutrition; used in medicine, feeds, paints, and margarine. Also known as linolic acid; 9,12-octadecadienoic acid.

Linoleic Acid


a monobasic carboxylic acid with two isolated double bonds, CH3(CH2)3 (CH2CH=CH)2(CH2)7COOH; a colorless oily liquid. Melting point, — 11°C; boiling point, 182°C (at 532 newtons per sq m, or 4 mm of mercury); density, 0.903 g/cm3 at 20°C.

Together with arachidonic acid and linolenic acid, linoleic acid is an irreplaceable fatty acid, necessary for normal vital activity. These acids are ingested by humans and animals with food, mainly in the form of complex lipids (triglycerides and phosphatides). A substantial quantity of linoleic acid in triglyceride form (up to 40–60 percent) is known to occur in many vegetable oils and animal fats, such as soy, cottonseed, sunflower, linseed, and hemp oils and whale blubber.

References in periodicals archive ?
Effects of conjugated linoleic acids on protein to fat proportions, fatty acids, and plasma lipids in broilers.
Elysian, MN, USA) was the source of conjugated linoleic acid (CLA) with the reported isomer content as follows: 39.
Rahman SM, Kinoshita T, Toyoaki A and Y Takagi Combining ability in loci for high oleic and low linoleic acids in soybean.
Conjugated linoleic acid (CLA) is a collective term describing a mixture of positional and geometric dienoic isomers of linoleic acid (LA).
The epoxy acids were synthesized from linoleic acid as previously described (Zheng et al.
Four years later, his team unmasked the mystery agent: one chemical form, or isomer, of linoleic acid.
Due to increased demand for value-added foods with health benefits, strategies have been initiated to produce dairy products enriched with conjugated linoleic acid (Ip et al.
1999) found that coplanar PCBs have a significant effect on the reduced synthesis of physiologically essential long-chain unsaturated fatty acids, such as arachidonic acid in rat liver, by suppressing delta-5 and delta-6 desaturase activities and thus allowing the omega-6 parent fatty acid, linoleic acid, to accumulate.
The [DELTA]9 desaturase, which is encoded by the stearoyl-CoA desaturase (SCD) gene, also converts trans-vaccenic acid (TVA) to its corresponding conjugated linoleic acid (CLA) isomer, cis-9,trans-11 CLA (Figure 1).
Conjugated linoleic acids alter milk fatty acid composition and inhibit milk fat secretion in dairy cows.
Effectiveness of oils rich in linoleic acids to enhance conjugated linoleic acid in milk from dairy cows.