Experiments conducted by the authors and their colleagues in the previous five years are summarized. It is concluded that dietary requirements for rumen-degradable, nitrogen (RDN) can be supplied entirely as nonprotein nitrogen (NPN): Also, that supplements of 'NPN and proteins are equally effective in stimulating forage intake, when intake of RDN in the forage is low, provided that intake of N...

Page Introduction . 1 Quality of proteins as a factor in nutrition 2 Quantity of proteins in foods and feeds 8 Estimation of protein in foods and feeds , 8 Nonprotein nitrogen in foods 4 Nitrogen content of different proteins ._. 5 Errors arising from tlie use of wrong conversion factors 7 Chemical composition of plant proteins in relation to the plant environment 7 Page Proteins of cereal grai...

Porcine calcitonin given to guinea pigs in doses causing hypocalcaemia and hypophosphataemia decreased the bilirubin concentration and increased the activity of gamma glutamyl transpeptidase (GGTP) in the hepatic bile. Calcitonin had no effect on bile flow, its pH, electrolyte composition including calcium, or on the concentration of protein, glucose, cholesterol, nonprotein nitrogen (NPN), and...

Approximate analyses of mushroom protein (Pleurotus sp.) revealed that it contains 2.78% protein and 0.14% nonprotein nitrogen on a fresh-weight basis. A total of 17 amino acids, including all the essential amino acids, were qualitatively identified. Quantitative estimation of essential amino acids showed that, except for methionine and phenylalanine, all are in fairly high concentration. From ...