CHEMICAL-COMPOSITION AND NUTRITIONAL QUALITY OF RAPESEED PROTEIN-CONCENTRATE

The nutritive value of leached and leached plus pressed rapeseed protein concentrate and unheated rapeseed flour were determined with weanling rats. Dehulled CTC-4 cultivate rapeseed (Brassica napus) was used as the source of protein due to its low glucosinolate content. The dehulled seed was placed in boiling water to inactivate the enzyme myrosinase; water and either solvent extracted or both, pressed and solvent extracted. Dehulled CTC-4 rapeseed (Brassica napus) was solvent-extracted and ground to prepare the rapeseed flour. The products contained 56,6; 61,7 and 40,7% protein. Protein quality as measured by determination of protein efficiency ratio and protein utilization was found to be similar to that of casein. The results show that heating and water extraction increase the feeding value of RPC.