The aim of this study was to investigate nitrification activity of urea and the assimilation of nitrate in a well aerated soil using perfusion technique with addition of glucose as an energy and carbon source. In this study, urea was rapidly nitrified by the bacteria in the saturated soil but its course of transformation to NO3 was not linear. There was an initial increase in the concentration ...

1. Apparently all disulphide bridges of transferrin and conalbumin were broken by reduction-alkylation, whereas sulphitolysis resulted in incomplete cleavage of disulphide bonds. 2. The molecular weights of reduced-alkylated and sulphitolysed transferrin and reduced-alkylated conalbumin were identical with those of native proteins in a number of solvents, indicating that these proteins exist as...

MOY, hZHARD h/I. Renal junction in the hibernating ground squirrel Spermophilus columbianus. Am. J. Physiol. 220(3) : 747-753. 1971. -A tissue-slice analysis showed no solute gradient of urea and sodium from the corticomedullary boundary through the papilla of torpid Columbian ground squirrels. Ground squirrels arousing normally from torpor and sacrificed 15 or 40 min after urine began to flow ...

The urease (EC 3.5.1.5) inhibitor, phenylphosphoryldiamidate (PPDA), was given by continuous infusion into the rumen of two sheep nourished by intragastric infusion and into either the rumen or abomasum of four sheep given a pelleted diet containing 119 g crude protein (nitrogen x 6.25)/kg dry matter. PPDA was given at 1 g/d in infusion sheep and 1.5 g/d in the normally-fed sheep. Measurements ...

The synthesis of iron oxide nano-particles by direct thermal decomposition was studied. Simultaneous thermal analysis and Fourier transform infrared spectroscopy results confirmed the formation of iron-urea complex, and disclosed iron oxide formation mechanism. Calcination of the iron-urea complex at 200°C and 250°C for 2 hrs. resulted in the formation of maghemite along with hematite as a seco...

in this paper, the rolling force and reduction ratio have been investigated in multilayer strip rolling. for this purpose, two different set of multilayers have been selected which are al/st/al and cu/al/cu layouts. at first, the validation of the numerical analysis was performed by using an experimental test. after validation of the numerical results, two set of multilayer layouts were simulat...

Industrial urea is an organic compound that widely used for various physiological processes and producing nitrogen fertilizers. This study hypothesized mixing with concrete would decrease the temperature expansion of cement microstructure abruptly due to reaction water a hydration product. tested hypothesis by experiments. The performance was evaluated after setting ratio industrial 0%, 5%, 10%...

The present study was aimed to evaluate the beneficial effect of Cystone syrup in an experimental model of glycerol-induced acute renal failure (ARF) in rats. Biochemical parameters, kidney weight and histopathological evaluation were performed to conclude the beneficial effect of Cystone syrup. Administration of single dose of 50% v/v glycerol (8ml/kg.i.m) caused severe renal dysfunction assoc...

an experiment was conducted with two hundred and twenty day-old male broiler chicks (ross 308) in five groups to investigate the effects of different levels of 0, 0.2, 0.4 and 0.6% thyme extract in drinking water (including 27.4 mg sodium nitrate per liter) on broiler performance and antioxidantstatus and blood gas indices. no significant differences were observed between the treatments for bod...