Rapeseed meal. IV. Continuous water extraction and short‐term feeding studies in rats with the detoxified product
Author
dc.contributor.author
Ballester, Digna
Author
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Rodríguez, Betty
Author
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Rojas, Mirna
Author
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Brunser, Mirna
Author
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Reid, Mirna
Author
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Yáñez, Mirna
Author
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Mönckeberg, Mirna
Admission date
dc.date.accessioned
2018-12-20T14:36:04Z
Available date
dc.date.available
2018-12-20T14:36:04Z
Publication date
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1973
Cita de ítem
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Journal of the Science of Food and Agriculture, Volumen 24, Issue 2, 2018, Pages 127-138
Identifier
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10970010
Identifier
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00225142
Identifier
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10.1002/jsfa.2740240204
Identifier
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https://repositorio.uchile.cl/handle/2250/156670
Abstract
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A continuous two‐hour water extraction procedure is proposed instead of the former 14‐hour method to remove the thioglucosides from rapeseed presscake meal (RSM). This new procedure produced a complete removal of isothiocyanates (ITC) and a reduction of 97% in oxazolidinethiones (VTO). Net protein utilisation (n.p.u.) increased from 40 to 69% and protein efficiency ratio (p.e.r.) from 0.8 to 1.94. The detoxified material showed a satisfactory growth‐promoting capacity for the rat at the level of 10% dietary protein. It did not cause hypertrophy of the thyroid, as compared to the untreated meal, but it produced histopathological damage of variable intensity to this gland. It also caused a slight increase in the size of the liver although the histology of this organ does not show signs of damage. The importance of the minimal residual VTO content in the washed rapeseed meal upon the effect of thyroid histology is discussed and the presence of substances other than VTO and ITC which could
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