1. Ammonia and urea transport across the colonic mucosa was studied by a perfusion technique in four subjects with colonic exclusion for chronic hepatic encephalopathy. 2. Reduction of luminal pH inhibited net and unidirectional transport of ammonia from lumen to plasma, but net absorption from high luminal concentrations persisted at low pH. 3. Neither addition of urea to the perfusate nor int...

The exposure of fish to air is normally expected to interfere with the nitrogen excretion process. Hoplias malabaricus and Hoplerythrinus unitaeniatus, two teleost species, display distinct behaviors in response to decreases in natural reservoir water levels, although they may employ similar biochemical strategies. To investigate this point, plasma levels of ammonia, urea, uric acid, and the tw...

FALK, J. L. AND M. TANG. Nonuremic hyperosmolality produced by sodium depletion• PHYSIOL. BEHAV. 10(4) 793-799, 1973.-Rats were rapidly sodium depleted by a 4-hr intraperitoneal dialysis against isotonic glucose, and various serum and urine measures were taken at 4, 12 and 20 hr from the start of dialysis for dialyzed and control groups. No food or water was allowed during this postdialysis per...

1. In focal and diffuse necroses of the liver due to haemotoxic sera there occurs an increased elimination of total nitrogen with a corresponding augmented output of urea. The ammonia excretion becomes slightly diminished at first, but later rises somewhat above normal. The undetermined nitrogen is markedly increased. 2. In diffuse degeneration with no necrosis on the other hand only a slightly...

A study was conducted to determine the variations in concentrations of blood glucose, total protein, cholesterol and blood urea nitrogen (BUN) in buffaloes (n=30) suffering from foreign body syndrome. These animals were subdivided into two groups showing traumatic reticuloperitonitis (TRP, n=20) and diaphragmatic hernia (DH, n=10). Six healthy female buffaloes of same age group were considered ...

The aim of this study was to evaluate the effects of balancing low protein diets for methionine and lysine on performance of early lactation Holstein cows under hot environmental temperature. Twenty one multiparous Holstein cows in early lactation were allocated to three experimental rations including, 1) High protein ration with 17.5% CP, 2) Medium protein ration with 16% CP and 12 g/d rumen p...

BACKGROUND Stunting is common among pediatric patients on peritoneal dialysis. AIM To establish the best profile for urea kinetic variables associated to growth in children on chronic peritoneal dialysis (PD). PATIENTS AND METHODS Twenty patients, aged 1 month to 14 years, 13 males, were followed for 6-12 months, with monthly measurements of weight/age and height/age Z score; plasma creatin...