نتایج جستجو برای: nitrate ions

تعداد نتایج: 167677  

Journal: :Tree physiology 1996
Matthew H. Turnbull Susanne Schmidt Peter D. Erskine Suanne Richards George R. Stewart

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...

2005
Xiu-ling Zhang Ji-xiao Wang Zhi Wang Shi-chang Wang

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 ...

Journal: :Journal of research in health sciences 2010
Peyman Shahbazi Forugh Vaezi Amir Hossein Mahvi Kazem Naddaffi Ali Reza Rahmani

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...

2012
Xu-Guang Li Meng-Meng Gao Seik Weng Ng

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...

2012

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....

2008
Ya-Feng Li Li Jin Dan-Ping Li Long Zhang

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...

2010
Wei-Na Wu Yuan Wang Ai-Yun Zhang Rui-Qi Zhao Qiu-Fen Wang

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...

2013
Chahrazed Trifa Amira Bouhali Sofiane Bouacida Chaouki Boudaren Thierry Bataille

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...

ژورنال: سلامت و محیط زیست 2016
حاجی میر محمد علی, راضیه سادات, کاریاب, حمید,

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...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2001
N Aslan A Kenar O Atakol E Kilic

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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