Rancidification of Fats

a change in the composition of fats during storage that makes them unsuitable for food, owing to their extremely rank odor and taste. Rancidification is caused by the appearance of certain volatile aldehydes, ketones, and acids of” low molecular weight, and nonvolatile peroxide substances. It may be biochemical, caused by the formation of molds on the fats, or it may be purely chemical, resulting from the oxidation of fatty acid radicals in glycerides upon exposure to atmospheric oxygen.

To prevent rancidification, fats are prepared under conditions that exclude the possibility of contamination by mold spores. They are thoroughly purified, and preservatives (for example, salt) are added to prevent biochemical rancidification. Fats (butter, margarine) should be stored in well-sealed packages at a temperature of 2°–6°C.

单词	rancidification of fats
释义	Rancidification of Fats Rancidification of Fats a change in the composition of fats during storage that makes them unsuitable for food, owing to their extremely rank odor and taste. Rancidification is caused by the appearance of certain volatile aldehydes, ketones, and acids of” low molecular weight, and nonvolatile peroxide substances. It may be biochemical, caused by the formation of molds on the fats, or it may be purely chemical, resulting from the oxidation of fatty acid radicals in glycerides upon exposure to atmospheric oxygen. To prevent rancidification, fats are prepared under conditions that exclude the possibility of contamination by mold spores. They are thoroughly purified, and preservatives (for example, salt) are added to prevent biochemical rancidification. Fats (butter, margarine) should be stored in well-sealed packages at a temperature of 2°–6°C.
随便看	american institute of nutrition american institute of oral biology american institute of oriental medicine american institute of outcomes case management american institute of parliamentarians american institute of permanent color technology american institute of pharmaceutical technology american institute of philanthropy american institute of physics american institute of planners american institute of plant engineers american institute of professional association group insurance administrators american institute of professional bookkeepers. american institute of professional geologists american institute of pyramidology american institute of real estate appraisers american institute of science and technology american institute of self defense arts american institute of service body manufacturers american institute of steel construction american institute of steel construction, inc. american institute of stress american institute of tae kwon do american institute of technology american institute of the history of pharmacy