نتایج جستجو برای: alkali and tl ions
تعداد نتایج: 16846200 فیلتر نتایج به سال:
Hydrothermally-synthesized titanate nanotubes (TNTs) are found to be excellent at adsorption of highly toxic thallium ions. Uptake of both thallium ions is very fast in the first 10 min. The adsorption isotherm of Tl(I) follows the Langmuir model with maximum adsorption capacity of 709.2 mg g(-1). Ion-exchange between Tl(+) and Na(+) in the interlayers of TNTs is the primary mechanism for Tl(I)...
iv abstract this study examined the linguistic behaviors of two iranian efl teachers each of them teaching learners of two similar proficiency levels, a beginner level and an intermediate level, to investigate the relationship between the learners proficiency levels and the amounts and purposes for l1 use by the two teachers. the study was carried out to investigate whether there were differe...
In a previous communication (1) it was shown that data obtained from transference experiments with alkali solutions of casein could be best interpreted on the assumption that the carriers of the current are alkali metal cations and casein anions. In the present studies on the transport numbers of solutions of casein with the alkali earth elements, the data appear to indicate that part of the me...
abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...
Transport of Tl+ and Rb+ in human and rat erythrocytes was investigated in the presence of ouabain. The chloride-dependent cotransport of Tl+, Rb+ and Na+ was precluded by replacement of Cl- by NO3-. The inward and outward rate constants for the residual fluxes of the cations were determined by measuring the transport of 204Tl and 86Rb in double label experiments. The rate of passive transport ...
The comparison of Optical absorption, Photoluminescence (PL), Thermoluminescence (TL) and other optical studies of X-ray irradiated Ce 3+ doped KBr and KI single crystals were discussed. Photoluminescence of these crystals exhibits characteristic Ce 3+ emission due to 5d-4f transition in both the studied material in addition to the host emission. Optical absorption and PL studies confirm the pr...
The results of this investigation have provided additional information by chemical methods of the extent of association in fused salts. Association effects observed in solubility and rate studies in fused alkali nitrate are shown to be consistent with the assumption that complex ions such as those existing in aqueous solutions are formed between metal ions and halide ions. In addition, the rate...
To understand the role of permeating ions in determining blocking ion-induced rectification, we examined block of the ROMK1 inward-rectifier K+ channel by intracellular tetraethylammonium in the presence of various alkali metal ions in both the extra- and intracellular solutions. We found that the channel exhibits different degrees of rectification when different alkali metal ions (all at 100 m...
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