Rapeseed meal III.—A simple method for detoxification

✍ Scribed by Digna Ballester; R. Rodrigo; J. Nakouzi; C. O. Chichester; E. Yáñez; F. Mönckeberg

• Book ID: 102431785
• Publisher: John Wiley and Sons
• Year: 1970
• Tongue: English
• Weight: 204 KB
• Volume: 21
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/jsfa.2740210309

✦ Synopsis

Two types of treatments of presscake meal of rapeseed (Brussicu nupus), steaming and water extraction, were tested to remove the thioglucosides responsible For its toxicity. The efficiency of each was judged by the residual concentration of isothiocyanates and oxazolidinethiones and the biological quality, available lysine, net protein utilisation and digestibility in rats.

Double water extraction gave the best results. It resulted in a reduction of 84% in oxazolidinethiones, the factor directly responsible for toxicity, and 77 % in isothiocyanates. Net protein utilisation increased to levels corresponding to those of animal proteins, from 40 to 69 %. The improvement in digestibility was reflected in the growth of rats.

Steaming and simple water extraction, however, reduced toxicity only slightly and improved biological quality very little.

The greatest change of the gross chemical composition in treated samples was observed in crude fibre, which appeared to increase.