to study the effect of type and different nitrogen fertilizers on controlling egyptian broomrape, field and greenhouse studies based on randomized complete block with three replications, were conducted at ferdowsi university of mashhad. greenhouse study treatments were consisted of ammonium nitrate, ammonium sulfate and urea each of which applied at four rates (75, 150, 300 and 350 kg/ha). fiel...

Urea is one of the final products of protein metabolism. In clinical analysis and dairy industry urea is a very significant parameter as excess in blood serum from its permissible range causes dysfunction of the kidney. Hence, its analysis is significant and is carried out frequently in various laboratories [1, 2]. Urea is an omnipresent compound present in blood and various organic fluids. It ...

Improvements in nitrogen (N) use efficiency reduce stress on the environment and improve tomato production. A two-year trial was conducted greenhouse tomatoes with a split-plot design, which one factor N application rate (150 kg·ha?1, N1; 200 N2; 250 N3) two other factors were type of urea applied (urea, T1; slow-release (polymer-coated) urea, T2, nitrification inhibitors (3,4-dimethylpyrazole ...

background: like several other parasites, teladorsagia circumcincta secretes or excretes urea, but nei-ther the rate of efflux nor the possible metabolic sources of the urea has been considered. methods: parasites were maintained by passage through sheep. urea efflux was measured using phe-nol/hypochlorite after treatment with urea aminohydrolase. the kinetics of creatine amidinohy-drolase and ...

Background The pathogenesis of endotoxemic tubular dys-function with failure in urine concentration is poorly understood. Urea plays an important role in the urinary concentrating mechanism and expression of the urea transporters UT-A1, UT-A2, UT-A3, UT-A4 and UT-B is essential for tubular urea reabsorption. The present study attempts to assess the regulation of renal urea transporters during s...

Potato is considered a nitrogen (N) intensive plant with low N use efficiency (NUE). The current study introduced an excellent approach by combining dicyandiamide (DCD), moringa seed oil (MSO), or zeolite (ZE), fertilizer for maximizing potato tuber yields and NUE as well minimizing tubers nitrate (NO3?) accumulation. impact of these materials on soil availability gaseous emissions (NH3, N2O) w...

A rapid and reproducible method is described for measurement of urea in biological materials (after deproteinisation) and in serum (without deproteinisation). Urea is colorimetrically determined with diacetyl monoxime and thiosemicarbazide in the presence of sulphuric acid, phosphoric acid and ferric chloride. The sensitivity of the colorimetric reaction and stability of the colour are enhanced...

to determine the effects of biofertilizers, nitrogen and azocompost on oil yield and essential oil content of dragonhead (dracocephalum moldavica l.), a field experiment was conducted as factorial in a randomized complete blocks design with 20 treatments and 3 replications. this study was performed at two locations during 2009-2010 on field in tarbiat modares university, and at the khoy agricul...