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Ethanol vapor deactivation of gossypol in cottonseed meal

Ethanol vapor deactivation of gossypol in cottonseed meal,10.1007/BF02525465,Journal of The American Oil Chemists Society,R. J. Hron,P. J. Wan,M. S. K

Ethanol vapor deactivation of gossypol in cottonseed meal   (Citations: 3)
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Most cottonseed cultivars contain gossypol, a polyphenolic antinutritional compound. “Free” gossypol is a physiologically active form of gossypol, which is toxic to young- and nonruminant animals. To utilize solvent-extracted cottonseed meal as a general feed, gossypol must be either removed or deactivated to a minimum level specified for each class of animal. Normally, deactivation is carried out prior to oil extraction; however, the desired level of deactivation is not always attained. A new supplemental method of deactivation has been found by using either ethanol or isopropanol vapors on solventextracted meal. In a bench-top set-up, ethanol vapor reduced free gossypol from 0.115 to 0.053%, and a further reduction to 0.026% has been observed with the addition of ferrous sulfate. The supplemental deactivation method can, in most cases, reduce free gossypol to significantly safer levels for feeding, thus increasing utility, and possibly demand, for cottonseed meal as a general animal feed protein source.
Journal: Journal of The American Oil Chemists Society - J AMER OIL CHEM SOC , vol. 73, no. 10, pp. 1337-1339, 1996
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