نتایج جستجو برای: nitrate ion

تعداد نتایج: 235664  

Journal: :The Biochemical journal 1984
C Godfrey C Greenwood A J Thomson R C Bray G N George

Preparations of nitrate reductase in the resting state from Pseudomonas aeruginosa exhibit an Mo(V) e.p.r. signal. Progressive reduction of the enzyme results at first in the intensification and then in the disappearance of the signal. Three different species of Mo(V) were detected by e.p.r. These are the high-pH species (g1 = 1.9871; g2 = 1.9795; g3 = 1.9632) and nitrate and nitrite complexes ...

Journal: :The Biochemical journal 1969
K F Faull W Wallace D J Nicholas

Nitrite oxidase and nitrate reductase in Nitrobacter agilis were shown to be separate enzymes. The best separation of the two systems was achieved by ammonium sulphate fractionation. The effects of various compounds, including antimycin A, 2-n-heptyl-4-hydroxyquinoline N-oxide and chlorate, also clearly distinguish between the two enzyme reactions. The relationship between the two opposing reac...

Hossein Faghihian Mohammad Hadi Mohammadi

Nitrate is an anion of major importance particularly in biological areas. Excessive amounts in water supplies indicate pollution from sewage or agricultural effluents. The effects of excessive quantities of nitrate in water are well known. In this research structural modification of natural clinoptilolite by isomorphic substitution was performed. Isomorphously substituted zeolite was prepar...

Journal: :Malaysian Journal of Analytical Science 2016

Journal: :Plant physiology 1976
C A Neyra R H Hageman

The observation that exposure of the leaf canopy to increasing concentrations of CO(2) (100-400 mul/l) decreases the influx of nitrate to the leaf blades, but not to the roots or stalks (largely leaf sheaths), was reconfirmed using (15)NO(3) (-). Decreases in leaf nitrate supply were associated with decreases in induction of nitrate reductase, thus supporting the view that the influx of nitrate...

2011
Wojciech Starosta Janusz Leciejewicz

In the structure of the title compound, [Li(C(5)H(4)N(2)O(2))(NO(3))](n), the Li(I) ion is coordinated by two carboxyl-ate O atoms donated by two ligands and two nitrate O atoms in a distorted tetrahedral geometry. Li(I) ions, bridged by carboxyl-ate O atoms, form mol-ecular ribbons composed of dimeric units. Two nitrate O atoms link the ribbons into mol-ecular layers parallel to (001). Hydroge...

2011
Ping Zou Ying Liu Guang-Feng Hou Jin-Sheng Gao

In the title compound, [Cu(NO(3))(2)(C(18)H(16)N(2)O(2))(2)](n), the Cu(II) ion lies on an inversion center and is six-coordinated in a Jahn-Teller-distored octa-hedral geometry defined by four N atoms of the pyridine derivative forming a square plane, above and below which are the O atoms of the nitrate anion. The ligand links the metal atoms linto a linear chain running along the a axis. One ...

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