saponification


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saponification

 [sah-pon″ĭ-fĭ-ka´shun]
conversion of an oil or fat into a soap by combination with an alkali. In chemistry, the term now denotes the hydrolysis of an ester by an alkali, resulting in the production of a free alcohol and an alkali salt of the ester acid.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

sa·pon·i·fi·ca·tion

(să-pon'i-fi-kā'shŭn),
Conversion into soap, denoting the hydrolytic action of an alkali on fat, especially on triacylglycerols; in histochemistry, saponification is used to demethylate or reverse blockage of carboxylic acid groups, thus permitting basophilia to occur.
[sapo- (sapon-) + L. facio, to make]
Farlex Partner Medical Dictionary © Farlex 2012

sa·pon·i·fi·ca·tion

(să-pon'i-fi-kā'shŭn)
Conversion into soap, denoting the hydrolytic action of an alkali on fat, especially on triacylglycerols.
[L. sapo- (sapon-), soap + L. facio, to make]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

saponification

Hydrolysis of a fat by an alkali to form a soap and an alcohol, usually glycerol.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

sa·pon·i·fi·ca·tion

(să-pon'i-fi-kā'shŭn)
Conversion into soap.
[L. sapo- (sapon-), soap + L. facio, to make]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
The present results concerning iodine value, peroxide value, saponification value, color, specific gravity and refractive index are in corroboration with results reported by Oluba et al.
TABLE II PHYSICAL AND CHEMICAL PARAMETERS OF Tapirira mexicana Marchand OIL Parameters Total lipids content (%) 73.1 [+ or -] 0.17 Humidity (%) 0.17 [+ or -] 0.02 Density (g/ml) 0.90 [+ or -] 0.00 Peroxide value (mEq O2/kg) 2.2 [+ or -] 0.05 Acidity index (mg KOH/g) 1.4 [+ or -] 0.00 Saponification number (mg/g) 165.2 [+ or -] 0.86 Rancidity Negative Values expressed as averages [+ or -] SD.
The presence of such a transformation is confirmed by IR spectroscopy data (the peak presence at 1800 [cm.sup.-1] corresponding to stretching vibrations >C=O groups in the CC) and chemical analysis (coincidence of the calculated and determined saponification number).
Saponification Value###175.0+-0.87###175.2+-1.30###174.0+-0.75###173.0+-0.71
The saponification and iodine values registered in this study are within the range of most oils suitable for food and cosmetics.
This "saponification" process turned them into a soap-like substance.
Refractive index, density, specific gravity, surface tension, acid value, free fatty acid value, saponification value, iodine value, colour and peroxide value were carried out.
In addition a comparison between two different methodologies as sonication in ultrasonic bath and saponification followed by liquid-liquid extraction is reported.
However, the proximate, fatty acid, amino acid, vitamin, sterol, and mineral compositions, which reflect nutritional value of seeds, and the physicochemical properties such as melting point, refractive index, iodine value, peroxide value, p-anisidine value, acid value, saponification value, p-anisidine value, and oxidative stability, which determine the uses and applications of seed oils, have been not yet analyzed for L.
The fatty acids in the fat from casein and serum were made into their methyl ester by saponification followed by esterification and analyzed by GC-FID.
In the present study, refractive index, peroxide, saponification, and acid values of different branded and unbranded vegetable oils were determined.