The relationship of the metabolic nitrogen of the faeces to body weight and to food intake for rats

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Abstract
A summary is made of 1160 detns. of fecal N excretion of rats on low-N diets. The regression of metabolic N on food intake is linear and has a significant slope. The partial correlation coeff. of metabolic N and food intake is 0.74; that of metabolic N and body wt., independent of food intake, is 0.50. The simple correlation coefficients are of the same order. The metabolic N consists of 2 fractions, one related to body wt., the other to dry food intake. Mitchell''s ratio (mgm. of metabolic N per gm. of food dry matter consumed) is valid above a certain min. food intake.

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