Abstract
The many peculiar effects of soybean oil feeding don’t bear evident relationship to the composition of its fatty acids. The known “impurities” as well as some unknown factors seem to play a leading role in defending its properties.
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Cottonseed oil and corn oil contain about 40% of linoleic acid.
It has not yet been established whether large doses of soybean oil cause in man an increase in the blood uric acid as fats in general do. In 1926 a theory was advanced by the writer (9) that the fat absorbed by the organism is carried, at least in part, to the vicinity of nucleins in the cells, from where the phosphoric acid is taken (to convert the fat into lecithin), thus setting the purine bodies free (or in combination with substances like d— ribose). In hens, a high fat ration does not produce any noticeable rise in the blood uric acid (13).
Of the species Penicilium, Fusarium, and Monilia.
Old oily sediments from the sedimentation tanks produce the highest fat—splitting effect upon the oil.
The writer showed in 1926 that feeding raw soybeans to animals is capable of producing fat necrosis due to lipase activity (10). More recent experimental data by other authors give support to such an assumption (17).
The peroxidase value of soybeans varies with the varieties from 7.5 to 88.02 units (22).
During oxidation of soybean oil peroxide groups form at the double bonds. While oxidized soybean oil is an excellent emulsifying agent for the dispersion of water in oils and fats (margarine) (14), it possesses undoubtedly also toxic properties.
Crude soybean oil contains from 1 to 3 per cent phosphatides, of which nearly two-thirds consist of cephalin and nearly one-third of lecithin (15).
Solvent extracted soybean oll (by benzine) contains free sitosterol esters, as well as sitosteryl—d—glucoside (16).
The “beany” flavoring substance in soybean oil is attributed in part to methyl—n—nonyl ketone (20).
During oxidation of soybean oil Vitamin A is destroyed.
Vitamin K is confined to the oil fraction of certain oils and fats (5).
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Horvath, A.A. Some biochemical aspects of soybean oil. Oil Soap 15, 75–76 (1938). https://doi.org/10.1007/BF02639471
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DOI: https://doi.org/10.1007/BF02639471