نتایج جستجو برای: blood urea nitrogen
تعداد نتایج: 810596 فیلتر نتایج به سال:
The title thio-urea derivative, C(14)H(18)N(4)O(5)S, features two substantial twists between its component fragments: the dihedral angle between the SN(2)C (thio-urea) and ONC(2) (amide) residues is 48.89 (7)° and that between the benzene ring and the amide residue is 30.27 (7)°. In the crystal, mol-ecules are linked by bifurcated N-H⋯(O,S) hydrogen bonds, generating [001] supra-molecular chains.
Urea clearance was determined on 25 healthy male medical students at Surabaja, Indonesia. The age of the subjects varied from 20 to 25 years, the average being 23 years. The subjects reported to the laboratory at 8 a.m., when they voided urine and then rapidly drank 500 m!. of iced water. At 9 a.m. they passed urine which was collected and measured, and 5 m!. of blood was withdrawn by vcnepuncl...
Filamentous, nitrogen-fixing cyanobacteria form extensive summer blooms in the Baltic Sea. Their ability to fix dissolved N2 allows cyanobacteria to circumvent the general summer nitrogen limitation, while also generating a supply of novel bioavailable nitrogen for the food web. However, the fate of the nitrogen fixed by cyanobacteria remains unresolved, as does its importance for secondary pro...
Retention of nitrogen (N) is a critical ecosystem function, especially in the face of widespread anthropogenic N enrichment; however, our understanding of the mechanisms involved is limited. Here, we tested under glasshouse conditions how plant community attributes, including variations in the dominance, diversity and range of plant functional traits, influence N uptake and retention in tempera...
In the title compound, C(13)H(18)N(2)O(2)S, the 4-meth-oxy-benzoyl fragment is approximately planar [maximum deviation = 0.057 (2) Å] and twisted relative to the thio-amide fragment, forming a dihedral angle of 86.62 (6)°. The two Csp(2)-Nsp(2) bonds in the thio-urea unit differ significantly in length [1.327 (2) and 1.431 (2) Å]. In the crystal, N-H⋯O hydrogen bonds link the mol-ecules into ch...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید