Data from 35 trials with 482 lactating cows fed 106 diets were used to study the effects of animal and dietary factors on the relationship between milk and blood urea N and the value of milk urea N in the assessment of protein status. In two trials, urea N in whole blood and in blood plasma were closely related (r2 = 0.952); the slope was not significantly different from 1.0, and the intercept ...

THE use of intravenous urea as a therapeutic agent is a recent development in the medical treatment of glaucoma and this paper reports a clinical evaluation of the drug in 43 cases. The first account of urea being given intravenously would seem to be that of Tanner (1852) in a paper on the use of oral urea as a diuretic, where he mentioned that "half a drachm" of urea, prepared from urine, had ...

The activity of urea cycle enzymes was assayed in duodenal biopsy specimens obtained from a female infant who presented with neonatal hyperammonaemia. All enzyme levels were normal except N-acetyl glutamate-dependent carbamyl phosphate synthetase 1 (CPS1) which was half the mean activity in normal control specimens. A similar deficiency of CPS1 was also shown in duodenal specimens from the pati...

The change produced in native proteins by various agents which results in loss of their characteristic properties and changes in solubility is called denaturation. The term, however, may be applied to structural and physical changes in the protein molecule which differ widely with the particular agent used. Urea denaturation differs in many respects from both heat and radiation denaturation. Ur...

Sixty-four steer calves were individually fed in a 181-day experiment to determine their gain, feed efficiency, plasma urea-N and seminal vesicle response following implantation with 30 mg of either stilbene, estriol, estrone, 16-estradiol, c~-estradiol or diethylstilbestrot (DES). Half of the steers were fed a constant level and the remaining half were fed a declining level of supplemental pro...

The precise microtubule array present in the heliozoan axopodium has been studied by experimental degradation by using the protein denaturing agent urea. Since concentrations used in typical applications were found to destroy the whole organism immediately, very dilute solutions, usually O I S M , were used to study axopodial retraction, which was shown to occur in 2 stages: the distal half rea...

Maize plays a vital role in Benin's agricultural production systems. However, at the producer-level, yields are still low, although of this cereal is necessary for food security. The aims study were to assess efficacy solid biostimulants formulated from rhizobacteria Pseudomonas putida and different binders on maize cultivation farming environment three (03) areas South Benin. For purpose, base...

plants are the most sources for cadmium enters to human food and this element in food regime may be a serious threat to human health. thus, the effect of azotobacter inoculum (azotobacter chroococcum), mycorrhiza fungi (glomus intraradaices) , zinc sulphate and urea on cadmium convertation and growth parameters of fenugreek medicinal plant (trigonella foenum gracum l.) in cadmium polluted soils...

The structure of the rhodanese-tetracyanonickelate (E X Ni(CN)2-4) complex has been characterized here in spectral and physical studies using urea as a structural perturbant. UV difference absorption, sedimentation velocity ultracentrifugation, fluorescence, and circular dichroism data show no significant conformational differences between sulfur-free rhodanese (E) and the E X Ni(CN)2-4 complex...