Pastures of Bermudagrass (Cynodon dactylon, BG), Caucasian bluestem (Bothriochloa caucasica, CBS), and gamagrass (Tripsacum dactyloides, GG) were evaluated from the perspectives of forage composition, selection during grazing, and N metabolism in beef steers. All pastures were fertilized with 78 kg/ha of N approximately 60 and 30 d before sample collection. In 2000 and 2001, 12 steers (250 kg o...

TRUNIGER, BRUNO, AND BODIL SCHMIDT-NIELSEN. Intrarenal distribution of urea and related compounds: effects of nitrogen intake. Am. J. Physiol. 207(s) : 971-978. rg64.-Nitrogen and NaCl intake influence the excretion of urea. In rats maintained on a low-protein, high-salt intake the urea-to-inulin clearance ratio decreases to 0.01. In antidiuretic “low-protein” rats the urea concentrations in th...

Helicobacter pylori possesses unusually high urease activity that lowers the urea concentration and raises the ammonium concentration of the gastric juice in infected people. The value of measuring urea and ammonium concentrations in gastric juice obtained during upper gastrointestinal endoscopy as a means of diagnosing the presence and eradication of the infection was assessed. Twenty four sub...

PURPOSE This study was undertaken to test the hypothesis that high concentrations of urea in gastric juice would have an influence on Helicobacter pylori infection in patients maintained on chronic hemodialysis (HD). MATERIAL AND METHODS We investigated 30 patients (17 males, 13 females; mean age 50.8 +/- 2.9 years) with end-stage renal disease (ESRD) undergoing hemodialysis treatment (HD) fo...

The oxidation-reduction potential of horse heart cytochrome c, pH 7.0, at various urea concentrations in the range 0 to 9 mol/liter has been measured. The ureamidpotential profile, unchanged up to about 5 M urea and asymptotically decreasing at higher urea concentrations with a limiting value of about 118 mV at 8.7 M urea, has been analyzed through comparison with the urea-midpotential profiles...

Agarose films were formed with the addition of 30 to 70 wt% choline chloride/urea eutectic-based ionic liquid (ChCl/Urea). The ChCl/Urea was prepared through complexation at a 1:2 mole ratio. The films were prepared by dissolving ChCl/Urea in distilled water followed by dispersion of the agarose at 95 °C. The solution was gelled at room temperature, and the formed gel was dried in an oven overn...

Research on the effect of cellulose and kaolin addition to alginate-cellulose-kaolin composites' characteristics as a slow-release agent urea fertilizer has been done. The technique used in preparation is an extrusion using 2% CaCl2 solution cross-linker. compositions were varied determine their such diameter, color, swelling ratio, entrapment efficiency, release urea. results showed that diame...

New urea containing gels have been used to prepare and stabilise gold nanoparticles by in situ reduction.

In this study nano-crystalline ZnO particles were synthesized by microwave-assisted solution combustion method. Zinc nitrate and urea were used as oxidizer and fuel, respectively. The effect of fuel to oxidizer (F/O) ratio on ZnO powder properties was investigated by using different urea/nitrate ratios. X-ray diffractometer, scanning electron microscopy and fourier transform infra-red were used...