ROW-RAMEL, FRANCOISE, FRAN~OISE CHOMETY, AND G. PETERS. Urea concentrations in hh.darj?uid and in wnal tissue of nondiuretic rats. Am. J# Physiol. 2 15(Z) : 429-438. 1968.-Concentrations of urea and of inulin or polyfructosan were measured in proximal and distal tubular fluid of nondiuretic rats (P,,,, 5.5 =t 0.6 rn~) and rats infused with small doses of urea (P,,,, 11.8 + 1.1 mM>, Papillas and...

Five ruminally, duodenally, and ileally cannulated sheep (average BW 62 kg) were fed 65% roughage: 35% concentrate diets (CP = 15%) in a 5 x 5 Latin square design to study the applicability of using a combination of defaunation with N supplements (soybean meal [SBM], corn gluten meal [CGM], blood meal [BM], urea, and casein) with different extents of ruminal degradation to manipulate microbial ...

I. In eight females, serum urea concentrations of 134-336 ml\l/l. were interpreted as indications of previous environmental salinities. 2. Fetal serum solute concentrations usually resembled those of the mother, but in two cases where fetal urea was higher, it was interpreted as a lag in urea reduction following movement from salt to fresh water. 3. Uterine fluid was similar to maternal serum i...

1. Definite morphological changes occur in the batonnets of the proximal convoluted tubule in stages of activity. 2. Atypical mitochondria but no batonnets exist in the regenerated cells found in chronic uranium nephritis. 3. No secretion of urea occurs in these cells which do not contain the cell organs. 4. The urea is secreted normally in the proximal convoluted tubule only (Leschke). 5. The ...

A blood culture bottle from a patient with bacteremia contained both Proteus rettgeri biogroup 5 and Providencia stuartii (described in Bergey's Manual of Determinative Bactiology [8th ed., 1974] as Proteus inconstans), which had the same unusual antibiotic resistance pattern. Single colonies of this P. rettgeri biogroup 5 isolate were shown to produce urea- clones. If current taxonomy is used,...

1. The clearance of isotopically labelled sodium diatrizoate by haemodialysis was measured in vitro, with simulated extracellular fluid, and in vivo in eleven patients, at varying rates of fluid or plasma flow. Clearance was also measured in five patients undergoing peritoneal dialysis. In all instances simultaneous measurements of urea clearance were made and the diatrizoate/urea clearance rat...

Urea, in concentrations unique to the renal medulla, increases transcription and protein expression of several immediate–early genes (IEGs) including the zinc finger-containing transcription factor, Egr-1 . In the present study, the proximal 1.2 kb of the murine Egr-1 5 9 -flanking sequence conferred urea-responsiveness to a heterologous luciferase reporter gene when transiently transfected int...

Feeding cattle diets high in degradable crude protein (CP) or in excess of requirements can reduce fertility and lower uterine pH. Objectives were to determine direct effects of urea and acidic pH during oocyte maturation and embryonic development. For experiment 1, oocytes were matured in medium containing 0, 5, 7.5, or 10 mM urea (0, 14, 21, or 28 mg/dl urea nitrogen, respectively). Cleavage ...