EVALUATION OF PROTEIN QUALITY FOR PIG BLOOD FIBRIN AND LIVER RESIDUE / 营养学报

ABSTRACT

Sixty Wistar rats were divided into 5 groups, 12 in each:1)Casein; 2) Fish powder (FP) ; 3) Fibrin; 4)Liver residue(LR) , 5)Nitrogen free(NF). The feeds for all groups of rats were at the level of 10% protein and at the same calories except NF. Growth test, nitrogen balance and recovery test were used and the levels of serum proteins and Hb were determined.The protein efficiency ratio (PER) of casein, FP, fibrin and LR were 1.90, 3.07, 2.61 and 1.28 respectively. Net protein ratio (NPR), apparent digestibility, true digestibility and net nitrogen ratio (NNR) were same as PER suggesting the protein quality of LR was low, FP was high and fibrin in the medium. The values of serum proteins also showed that 10% protein of LR could not maintain rats in health, but compared with casein and FP the nutritional quality of fibrin was high and could be used in feed industry or other products.The effects of proteins on hepatic microsomal enzyme were observed. The influence factors were discussed.