The efficiency of protein utilization for growth in preruminant calves is decreasing with increasing body weight. In contrast to calves weighing less than 100 kg of body weight, heavy preruminant calves do not respond in protein retention to an increased intake of indispensable amino acids in dose-response studies. The marginal efficiency of protein utilization is low compared with pigs and mil...

Component models were developed to predict the net efficiency of ME utilization for gain in cattle and to predict daily gain using recovered energy as the input. These models were integrated into a single model to predict daily gain from ME available for gain. One component model predicts the net efficiency of ME utilization for gain using constant partial net efficiencies of 0.2 and 0.75 for M...

I n the anesthetized dog with right-heart bypass the injection of perhexiline was followed by the vasodilatation of the coronary. systemic and pulmonary vascular beds. There was a fall in left ventricular work, index of energy utilization. and myocardial oxygen consumption. The ratio of A cardiac output oxygen consumption was elevated following the administration of perheniline. Al l these effe...