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Crambe seed processing: Decomposition of glucosinolates (thioglucosides) with chemical additives

  • Technical
  • Published:
Journal of the American Oil Chemists Society

Abstract

Crambe meal was cooked with a variety of bases and metal salts to study decomposition of the undesirable glucosinolate (thioglucoside),epi-progoitrin. Salts of iron and copper were preferred because they were the most active decomposers and because they did not reduce the lysine content as did the alkalies. An unsaturated hydroxy nitrile, representing about 25 mole per cent of the decomposedepi-progoitrin, was the major reaction product left in the cooked meal. A thionamide product, representing about 7 mole per cent of the decomposedepi-progoitrin, was also observed in meals cooked with metallic salts. The thionamide was relatively unstable in moist, hot crambe meal, especially at basic pH, and may therefore be an intermediate in a complex decomposition path. Rats fed ferrous sulfate-treated crambe meal as 30% of a protein sufficient diet gained 70% compared with a basal control. Enlargement of thyroid, liver and kidneys was about 1.5 times that of the control organs. A crambe meal heated under the same conditions but without ferrous sulfate and fed at the same diet level caused 100% mortality within two weeks.

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Authors and Affiliations

  1. Northern Regional Research Laboratory, 61604, Peoria, Illinois

    L. D. Kirk, G. C. Mustakas & E. L. Griffin Jr.

  2. Western Regional Research Laboratory, 94706, Albany, California

    A. N. Booth

Authors
  1. L. D. Kirk
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  2. G. C. Mustakas
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  3. E. L. Griffin Jr.
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  4. A. N. Booth
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Additional information

Northern Marketing and Nutrition Research Division, ARS, USDA.

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Kirk, L.D., Mustakas, G.C., Griffin, E.L. et al. Crambe seed processing: Decomposition of glucosinolates (thioglucosides) with chemical additives. J Am Oil Chem Soc 48, 845–850 (1971). https://doi.org/10.1007/BF02609297

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  • DOI: https://doi.org/10.1007/BF02609297

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