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  • Title: Effect of protein quality on weight and composition of the carcass in pregnant and non pregnant rats.
    Author: Verdú MC, López Frias M, Mataix FJ, Campos MS.
    Journal: Nahrung; 1988; 32(3):249-54. PubMed ID: 3393210.
    Abstract:
    The effect of diets with different protein qualities on net weight and on the composition of the carcass (the animal being skinned and gutted) were studied in pregnant and non-pregnant rats of the Wistar breed. The animals were fed with diets containing the following protein sources: casein + 5% DL-methionine, beans and a mix of beans and wheat, all with a protein level of 14%. Percentage weight gains in the carcass were in all cases greater in non-gestating animals than in gestating animals. The water content of the body was similar in all the groups tested. The quality of protein did not affect nitrogen content; however, a smaller proportion of nitrogen was observed in gestating animals than in non-gestating animals. With respect to fat content of the carcass, a greater quantity of fat was observed in the bodies of gestating rats than in non-gestating rats, which was only significant in the case of the bean-wheat mix diet. Within each group of gestating and non-gestating rats, there was a greater quantity of fat in those animals fed with casein.
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