Effect of Gamma‐Radiation on Gossypol in Cottonseed Meal

Abstract

The effect of gamma-radiation, in the range 5-30 KGy on free, total and pure gossypol was investigated in an attempt to reduce or eliminate gossypol from cottonseed meal using different solvent systems. Maximum reduction in gossypol concentration was attained at a dose of 25 KGy of gamma-radiation with chloroform as a solvent, a spectrometric method was used for analysis. The reductions attained for pure, free and total gossypol were found to be 96%, 60% and 80%, respectively.

Gossypol Toxicity from Cottonseed Products

“…Radiation treatment using gamma [ 60 , 167 , 168 ] or electron beam irradiation [ 60 , 61 ] may reduce free gossypol concentrations. In fact, gossypol irradiation reduced in vitro prooxidative activity and embryotoxicity in mice [ 168 ].…”

Changes of Endogenous Antioxidants and Fatty Acid Composition in Irradiated Rice Bran during Storage

“…Radiation processing of food may be used to achieve a wide variety of technological objectives and to serve many valuable purposes. γ-Radiation has been used to inhibit sprouting in potatoes (Kodenchery and Nair, 1972) and garlic bulbs (Kwon et al, 1985), to reduce cooking time of legumes (Rao and Vakil, 1985), to reduce toxic constituents such as antithiamin in tuna (Hilker et al, 1972), to reduce flatulence-causing oligosaccharides in green gram (Rao and Valkil, 1983), to inactivate chymotrypsin inhibitors (Iyer et al, 1980), to reduce gossypol in cottonseed (Jaddou et al, 1983), and to reduce the number and/or the activity of viable microorganisms in peanuts (Chiou et al, 1990), barley malt (Kempe et al, 1964), and chickens (Lamuka et al, 1992;Katta et al, 1991). However, the high irradiation doses involved may produce unacceptable off-flavors and odors, undesirable color changes, and textural and nutritional losses (Delince ´e, 1983a).…”