Showing papers on "Rapeseed published in 1968"

The proteins of rapeseed (Brassica napus L.) soluble in salt solutions.

Abstract: The salt-soluble proteins from rapeseed (Brassica napus L.), variety Nugget, have been extracted with 0.01 M sodium pyrophosphate (pH 7.0) and with 10% sodium chloride, and subsequently separated i...

New process for the production of better‐quality rapeseed oil and meal. I. Effect of heat treatments on enzyme destruction and color of rapeseed oil

Abstract: The thioglucosides (which are precursors of toxic principles) and the fibrous hulls of rapeseed are the two major factors which limit the utilization of rapeseed meal as a protein supplement in human foods. In commercial practice the enzyme responsible for the liberation of toxic principles from thioglucosides is destroyed by a dry-heat treatment, but no attempt is made to remove the thioglucosides or the fibrous matter from the meal. The new wet-heat method of processing to inactivate myrosinase also results in the production of an improved quality of oil. In this paper the advantages of a wet-heat treatment in processing rapeseed are discussed.

Use of grasshoppers in bioassay of thioglucosides in rapeseed (Brassica napus).

Abstract: THE thioglucoside content of rapeseed (Brassica spp.) varies considerably depending on variety1, environmental conditions (ref. 2 and unpublished work of R. K. Downey and L. R. Wetter), and species3. The seeds contain the following thioglucosides: gluconapin, glucobrassiconapin and progoitrin, and the enzyme myrosinase which can hydrolyse these thioglucosides respectively to 3-butenyl, 4-pentenyl and 2-hydroxy-3-butenyl isothiocyanates4 (ITC). The 2-hydroxy-3-butenyl ITC is not stable and following cyclization produces 5-vinyl-2 oxazolidinethione, commonly called goitrin. Previous investigations showed that these compounds are responsible for depression of growth and thyroid enlargement in non-ruminant animals5. Because rapeseed meal is used as a protein supplement in feeding livestock, it would be desirable either to reduce or completely to eliminate these thioglucosides from rape-seed6.

Rapeseed meal as a replacement for soybean meal in diets of progeny from sows fed either protein supplement

Abstract: First- and second-litter progeny from sows fed either 0 or 8% solvent-extracted rapeseed meal in replacement for isonitrogenous amounts of soybean meal and wheat was used to evaluate solvent-extracted rapeseed meal as a protein source. There was no influence of the dam’s diet on gain, efficiency of feed utilization, digestible (DE) and metabolizable energy (ME) or digestible nitrogen (DN) and nitrogen retention in the progeny. In pigs from first litters, the feeding of 8% rapeseed meal, compared with 0% rapeseed meal, depressed feed intake and rate of gain in the finishing period from 55 to 90 kg liveweight, and resulted in reduced gain and poorer efficiency of feed utilization for the overall experiment from 6 kg initial weight. Carcasses from rapeseed meal-fed pigs were leaner. Gilt carcasses were leaner than barrow carcasses. With second-litter pigs, there were no significant differences associated with dietary treatment or sex. There were no significant differences in DE or ME or in DN and nitrogen re...