نتایج جستجو برای: organic ion exchanger

تعداد نتایج: 410086  

Journal: :The Biochemical journal 1975
D P Thornhill

Purified elastin was hydrolysed with HCl and manipulated under conditions that minimized oxidation. Gel-permeation chromatography on polyacrylamide gel and ion-exchange chromatography on dextran cation-exchanger each resulted in the separation of a series of yellow fluorescent fractions. These hitherto unreported ampholytes have fluorescence spectra that approximate to that of the intact protei...

Journal: :Chemical & pharmaceutical bulletin 1987
T Katsu M Kanamitsu Y Fujita

A p-nitrophenolate-sensitive membrane electrode was constructed by using tetraheptylammonium chloride as an ion-exchanger and o-nitrophenyl phenyl ether as a membrane solvent. The electrode responded to p-nitrophenolate down to 1 ,ƒÊM in a buffer solution of 0.1 M Na2CO3NaHCO3 (pH 10). The selectivity coefficients of the electrode to typical anions increased in the following order: Cl-<NO3< SCN...

Journal: :Plant physiology 1968
A J Hiatt

Excised roots of barley (Hordeum vulgare, var. Campana) were incubated for periods up to 24 hours in salt solutions of various concentrations and ion accumulation was determined at various time intervals. The data were consistent with the existence of 2 components of ion uptake, one accounting for ion uptake from solutions below 1 mm and both components contributing to uptake from solutions of ...

Journal: :The Journal of biological chemistry 2001
A Sääf L Baars G von Heijne

We have determined the topology of the Escherichia coli inner membrane protein YrbG, a putative Na(+)/Ca(2+) exchanger with homology to a family of eukaryotic ion exchangers. Our results show that the two homologous halves of YrbG both have five transmembrane segments but opposite membrane orientations. This has implications for our understanding of the function of Na(+)/Ca(2+) exchangers and p...

2015
Fei Xu Shangbin Jin Hui Zhong Dingcai Wu Xiaoqing Yang Xiong Chen Hao Wei Ruowen Fu Donglin Jiang

Organic batteries free of toxic metal species could lead to a new generation of consumer energy storage devices that are safe and environmentally benign. However, the conventional organic electrodes remain problematic because of their structural instability, slow ion-diffusion dynamics, and poor electrical conductivity. Here, we report on the development of a redox-active, crystalline, mesoporo...

Journal: :Cell 1996
Israel Sekler Sumire Kobayashi Ron R Kopito

Intracellular pH is maintained by a dynamic equilibrium balancing the opposing forces of proton loading and proton extrusion. By providing an efflux pathway for base, anion exchangers constitute a key component of the plasma membrane proton-loading machinery. The data in this paper identify a histidine-rich sequence within the cytoplasmic domain of the nonerythroid anion exchanger, AE2, that se...

Journal: :American journal of physiology. Renal physiology 2012
Pascal Houillier Soline Bourgeois

This review will briefly summarize current knowledge on the basolateral ammonia transport mechanisms in the thick ascending limb (TAL) of the loop of Henle. This segment transports ammonia against a concentration gradient and is responsible for the accumulation of ammonia in the medullary interstitium, which, in turn, favors ammonia secretion across the collecting duct. Experimental data indica...

Journal: :iranian journal of nuclear medicine 2010
seyed pezhman shirmardi mostafa gandomkar mojtaba shamsaei abbas zare mirakabadi mohammad ghannadi maragheh

introduction: iranian scorpion species are classified in buthidae and scorpionidae with 16 genera and 25 species. in iran, similar to other parts of the world, there are a few known species of scorpions responsible for severe envenoming. mesobuthus eupeus is the most common species in iran. its venom contains several toxin fractions which can affect the ion channel. in this study purification, ...

Ali Roozbahani M.R Tagebakhsh Mohsen Morravati Syed w. Husain Vahid kiarostami

Phosalone, malathion and diazinon were analyzed in corn oil using solid phase extraction (SPE)with lanthanum silicate as a new solid sorbent followed by gas chromatography with nitrogenphosphorus detection (GC-NPD). The efficiency of different eluents (methanol, dichloromethane,ethyl acetate, dichloromethane — ethyl acetate (1:1) and ethyl acetate — methanol (1:1)) werecompared for elution of o...

Journal: :Molecular pharmacology 2000
L Li P J Meier N Ballatori

One member of the OATP family of transporters, rat Oatp1, functions as an anion exchanger that is driven in part by the glutathione (GSH) electrochemical gradient, indicating that other OATP-related transporters may also be energized by this mechanism. The present study examined whether rat Oatp2 is also an anion exchanger, and, if so, whether it is energized by the GSH electrochemical gradient...

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