نتایج جستجو برای: anions

تعداد نتایج: 29584  

Journal: :Chemical communications 2010
Chuandong Jia Biao Wu Shaoguang Li Zaiwen Yang Qilong Zhao Jianjun Liang Qian-Shu Li Xiao-Juan Yang

A fully complementary tris(urea) receptor for phosphate and sulfate anions has been developed by mimicking the scaffold of terpyridine which shows very high affinities and selectivities toward the tetrahedral anions.

Journal: :Inorganic chemistry 2009
Marco W Bouwkamp Auke Meetsma

The first example of an early-transition-metal complex involving a pentaarylfullerene was prepared. Instead of half-sandwich complexes, solvent separated ion pairs were obtained in which the pentaarylfullerene moiety acts as noncoordinating cyclopentadienyl anion.

Journal: :Colloids and Surfaces A: Physicochemical and Engineering Aspects 2021

The influence of anion specificity on the faradaic efficiency relative to aluminum oxidation during electrocoagulation has been reported. While with chaotrope anions, is higher than 1, it lower 1 kosmotrope anions. origin this distinction ascribed ability anions cause pitting through thin passive film at surface, which depends varying resistance dehydration. nature cation supporting electrolyte...

2002
ROBERT E. FEENEY CLAUDE F. MEARES

Preliminary evidence suggested that phosphate or borate destabilize iron. ovotransferrin nitrilotriacetate complexes in the absence of added bicarbonate. The iron. ovotransferrin.EDTA complex was prepared in the absence of bicarbonate, and a number of anions, including phosphate, sulfate, and citrate, were found to perturb the visible absorbance (A,,,,, = 490 nm) of this complex. Other anions, ...

Journal: :Critical Care 2008
Bala Venkatesh Thomas J Morgan

Evidence is emerging that elevated concentrations of the intermediates of the citric acid cycle may contribute to unmeasured anions in critical illness. Both the anion gap and the strong ion gap are used as scanning tools for recognition of these anions. The mechanisms underlying these elevations and their significance require further clarification.

Journal: :The Journal of General Physiology 1983
J A Dani J A Sanchez B Hille

The effects of external anions on gating of Na channels of frog skeletal muscle were studied under voltage clamp. Anions reversibly shift the voltage dependence of peak sodium permeability and of steady state sodium inactivation towards more negative potentials in the sequence: methanesulfonate less than or equal to Cl- less than or equal to acetate less than Br- less than or equal to NO-3 less...

2012
Chao-Hong Ma Qiang Liu Xiu-Yan Wang Xian-Wu Dong Yu-Jie Li

In the title compound, {[Zn(2)(C(9)H(3)O(6))(OH)(H(2)O)]·0.5H(2)O}(n), there are three independent Zn(II) atoms present; two are located on special positions, viz a twofold rotation axis and an inversion centre, and the third is located in a general position. The Zn(II) atom on the inversion centre is six-coordinated by four O atoms from four different benzene-1,2,3-tricarboxyl-ate anions and t...

2010
Shie Fu Lush Fwu Ming Shen

The asymmetric unit of the title heterometallic coordination polymer, [Cu(3)Eu(2)(C(7)H(3)NO(4))(6)(H(2)O)(6)](n), contains one Eu(III) and two Cu(II) atoms, three pyridine-2,4-dicarboxylate (pdc)(2-) anions and three water molecules. One Cu(II) atom is located on an inversion center and is N,O-chelated by two pdc(2-) anions in the equatorial plane and further coordinated by two carboxyl-ate O ...

The electrochemical process of cuprous oxide production is by the anodic dissolution of copper in an alkaline concentrated sodium chloride solution. The initial chloride in the electrolyte cell provides a condition for the formation of cuprous chlorocomplex anions. In the end,the cuprous oxide is formed through the anions hydrolysis by the hydroxyl ions, which are generated in the cathodic reac...

ژورنال: علوم آب و خاک 2019

The aim of this study was the effect of raw water quality on the efficiency of domestic reverse osmosis apparatus in Khuzestan province. The results showed that the purified water quality was related to the quality of entrance raw water. With increasing in salt concentrations (EC) or TDS, purification efficiency was decreased. The cation and anions content of refinery water was related to TDS a...

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