Animals transplanted with the MAC16 colon adenocarcinoma showed a loss of body weight as the tumor weight increased, without a reduction in food intake. Both adipose tissue and muscle mass decreased in tumorbearing animals, although loss of body fat exceeded that of muscle mass for given tumor weight. Urinary nitrogen excretion was significantly elevated when the weight loss did not exceed 3 to...

Nitrogenous excretion by the terrestrial anomuran crab Birgus latro L. was examined. The main excretory product was uric acid, representing 79-5 % of total excretory nitrogen. It was eliminated as white faeces separate from undigested food material and made up 82-6% of excretory faecal nitrogen. The faeces were the principal route of nitrogenous excretion, accounting for 96-2% of total excretio...

Geboes, Karen P., Vicky De Preter, Anja Luypaerts, Bert Bammens, Pieter Evenepoel, Yvo Ghoos, Paul Rutgeerts, and Kristin Verbeke. Validation of lactose[N,N]ureide as a tool to study colonic nitrogen metabolism. Am J Physiol Gastrointest Liver Physiol 288: G994–G999, 2005. First published December 30, 2004; doi:10.1152/ajpgi.00408.2004.—In vitro experiments have shown that fermentation of carbo...

This study aimed to determine excretion rates of ammonia and urea of Australian short-finned Ž . elvers as influenced by varying dietary crude protein intake. Elvers 2.3"0.02 g were fed diets Ž . Ž . Ž . Ž . containing dietary crude protein levels of 25% P25 , 35% P35 , 45% P45 and 55% P55 dry Ž matter equivalent to 14.17, 19.24, 20.57 and 26.39 g CPrMJ, respectively pairs of diets P25, P35 . a...

in this study, we determined the effects of replacing different levels of alfalfa with pistachio hull (ph) on feed intake, digestibility of nutrients, rumen fermentative parameters, blood metabolites and nitrogen metabolism in balochi male lambs. three male lambs (35±2 kg live weight) equipped with ruminal and abomasual cannulas were randomly assigned into a 3 × 3 latin square design. experimen...

Thirty patients suffering from chronic kidney disease were examined for urinary, fecal and total plasma porphyrins. Twenty patients had nitrogen retention whereas the remaining ten patients displayed normal values. Urinary coproporphyrin excretion and total plasma porphyrin levels were comparatively less pronounced in patients with nitrogen retention. Such changes in porphyrin metabolism could ...

fact that Munro's experiments were carried out under less satisfactory conditions; he himself states that more than half the tadpoles died during the first week, and that from the original 250 eggs only 10 survived to metamorphosis. Our own animals were well fed on a high-protein diet and had a high survival rate. Munro, on the other hand, does not state that his animals were fed but only that ...