Palmitic Acid


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Related to Palmitic Acid: linoleic acid

palmitic acid

[päl′mid·ik ′as·əd]
(organic chemistry)
C15H31COOH A fatty acid; white crystals, soluble in alcohol and ether, insoluble in water; melts at 63.4°C, boils at 271.5°C (100 mmHg); derived from spermaceti; used to make metallic palmitates and in soaps, waterproofing, and lubricating oils.
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 It might be outdated or ideologically biased.

Palmitic Acid

 

CH3(CH2)14COOH, a monobasic saturated carboxylic acid; colorless crystals. Melting point, 63.1°C; boiling point, 351.5°C. Palmitic acid is insoluble in water and moderately soluble in alcohol, benzene, and acetone. Along with stearic acid, it is the most widely distributed saturated fatty acid in nature, occurring as an ester of glycerol in nearly all the known natural fats. The average palmitic acid glyceride content in palm oil is 32–40 percent; in butter, 25 percent; in bean oil, 6.5 percent; and in pork fat, 30 percent. Esters of palmitic acid and higher alcohols form waxes; for example, the cetyl ester of palmitic acid is the principal constituent of spermaceti wax, and the myricyl ester is the main component of beeswax. Coenzyme A is involved in the biosynthesis and metabolism of palmitic acid.

Palmitic acid is usually isolated by rectification or fractional recrystallization from acid mixtures that are obtained through the saponification of fats. Certain palmitic acid esters are used in the manufacture of detergents and cosmetics. Palmitic acid salts, along with the salts of certain other carboxylic acids, are classified as detergents. In combination with stearic acid, palmitic acid is a constituent of stearin.

V. N. FROSIN

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The pretreatment of polyethylene films with palmitic acid gave positive results on degradation.
Ten ppm of ractopamine results in meat with healthier fat by providing higher concentrations of PUFAs, such as linoleic acid, [gamma]-linolenic acid, [alpha]-linolenic acid, and arachidonic acid, and lower concentrations of palmitic acid, SFAs, AI, TI and the omega 6: omega 3 ratio.
Myristic acid, palmitic acid, and linolenic acid were also identified in representative quantities.
Figure 2 illustrates biological molecules that were analyzed: lipids such as palmitic acid and stearic acid, quercetin which is a flavonoid, and glucose a sugar.
The cells were subsequently changed to serum-free medium and treated without or with different concentrations of palmitic acid (0.2 or 0.4 mM) for the indicated time intervals (12 or 48 hours).
Wang et al., "Saturated free fatty acids, palmitic acid and stearic acid, induce apoptosis by stimulation of ceramide generation in rat testicular Leydig cell," Biochemical and Biophysical Research Communications, vol.
The third fatty acid which gave significant amount hydrocarbons by electron beam irradiation was palmitic acid with pentadecane (C15:0) and 1-tetradecene (C14:1) as radiolytic products showing high content in case of Cn-2 than Cn-1.
The EPA/AA ratio (eicosapentaenoic acid/arachidonic acid) and the amounts of saturated fatty acids, omega-9 fatty acids, cis-monounsaturated fatty acids, saturated long-chain fatty acids, palmitic acid, and palmitoleic acid were higher in the control population.
In this last case, neutral palmitic acid can also be cointercalated into the interlayer spacing, forming hydrogen bonds with carboxylate anions or hydroxide groups.
The results showed that UFAs (palmitoleic acid, oleic acid, linoleic acid, linolenic acid, eicosenoic acid, and eicosadienoic acid) account for between 81.71 and 83.06%; the main monounsaturated fatty acid (MUFA) was oleic acid, and the main SAFA was palmitic acid. The total MUFAs, PUFAs, and SAFAs compositions were between 22.38 and 25.76%, between 56.10 and 60.68%, and between 16.36 and 17.55%, respectively.
Mean [+ or -] SEM proportions of constituents were 29.7 [+ or -] 0.5% linoleic acid, 22.4 [+ or -] 0.2% palmitic acid, 20.1 [+ or -] 0.3% oleic acid, 6.9 [+ or -] 0.1% stearic acid, 5.6 [+ or -] 0.1% arachidonic acid, and 4.6 [+ or -] 0.2% docosahexaenoic acid, and the others were below 3.0% each.
The exposure of differentiated skeletal myotubes to saturated palmitic acid leads to lipotoxicity-mediated myofiber loss [12].