نتایج جستجو برای: nitrate ions
تعداد نتایج: 167677 فیلتر نتایج به سال:
The capacity for nitrate reduction, as measured by nitrate reductase activity (NRA), was generally low for a range of plant communities in Australia (coastal heathland, rainforest, savanna woodland, monsoon forest, mangrove, open Eucalyptus forest, coral cay open forest) and only a loose relationship existed between NRA and leaf nitrogen concentration. This suggests that nitrate ions are not th...
Polypyrrole(PPy) nanowire modified electrodes were developed by template-free electrochemical method based on graphite electrode. The modified electrode was characterized by their amperometric response towards nitrate ions. Before reduction of nitrate ions, electrochemical solid-phase extraction (EC-SPE) of nitrate in/on modified electrodes was conducted. It is found that the unusual nanowired ...
BACKGROUND A laboratory study was conducted to investigate the ability of a special type of strongly basic resin MP500WS for the removal of nitrate from different waters. METHODS Two different types of Point-of-Use (POU) devices containing an identical resin were used. MP500WS known as macro porous was used in POU devices for removal of high concentrations of nitrate and sulfate ions from wat...
Copper nitrate in methanol solution cleaves the N-C(methanol) bond when reacted with 3-methyl-5-phenyl-pyrazole-1-methanol to yield the centrosymmetric dinuclear title compound, [Cu(2)(CH(3)O)(2)(NO(3))(2)(C(10)H(10)N(2))(4)], in which the Cu(II) atom is linked to a nitrate ion, two methano-late ions and two pyrazole ligands in a distorted square-pyramidal environment. The O atom of the nitrate...
Canadian Council of Ministers of the Environment, 2012 he nitrate ion (NO3) (CAS No. 14797-55-8, atomic mass 62.0049 g·mol) is the most oxidized form of nitrogen (N) present in the environment with an oxidation state of +5 (NRC 1978). It is the conjugate base of nitric acid (HNO3), a strong acid which is completely dissociated in solution (NRC 1978). The nitrate salts of all common metals (e.g....
The title compound, neodymium(III) oxide nitrate, which is isostructural with LaO(NO(3)), arose from a solvothermal reaction. The Nd ion (site symmetry m) is ten-coordinated by eight O atoms of NO(3) groups and two μ(2)-oxide ions. A three-dimensional structure is constructed by the inter-connection of NdO(10) polyhedra. The oxide ion and the N atom and one of the nitrate O atoms possess site s...
In the title complex, [Zn(NO(3))(2)(C(17)H(14)N(2)O(2))(H(2)O)], the six-coordinated Zn atom is in a distorted octa-hedral geometry, the donor centers being two O atoms and one N atom from the tridentate organic ligand, a water O atom and two O atoms from two monodentate nitrate ions. In the crystal, O-H⋯O hydrogen bonds between the coordinated water mol-ecules and nitrate O atoms and N-H⋯O hyd...
In the title compound {(C3H5N2)[Na(NO3)2]} n , the Na(I) ion is coordinated by eight O atoms from three bidentate nitrate anions and two O atoms from two monodentate nitrate anions, displaying a bicapped trigonal-prismatic geometry. The imidazolium cation is essentially planar (r.m.s. deviation for all non-H atoms = 0.0018 Å). In the crystal, the Na(I) ions are connected by bridging nitrate lig...
Background and Objective: The concentration of nitrate, factors affecting the balance sheet, and the changes in an aquifer is of utmost importance. Because modeling is an efficient method to predict the concentration of ions in water resources, in this study using lumped-parameter model and Monte Carlo simulation model, the nitrate concentrations in groundwater resources of Qazvin Plain were es...
A new nitrate-selective liquid-membrane electrode based on the tris(2,2',2"-salicylideneimino)triethylamine-iron(III) complex has been developed. This electrode exhibits a linear Nernstian response over the range 10(-1)-10(-4) M of nitrate, with a slope of 54.3 +/- 0.9 mV per p[NO3]. The effects of the pH and the liquid-membrane composition were also investigated. The lifetime of the electrode ...
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