Permeation selectivity in the electro-dialysis of mono- and divalent cations using supported liquid membranes
نویسندگان
چکیده
We investigated in detail the permeation selectivity electro-dialysis of Na+, K+, Mg2+ and Ca2+ both binary quaternary mixtures using a supported liquid membrane (SLM). The SLM consisted organic 2-nitrophenyl octyl ether (NPOE) containing lipophilic anion, i.e. tetrakis[3,5-bis(trifluoromethyl)phenyl]borate, as cation-exchanging site, which was used to fill pores supporting AccurelR. first determined electro-phoretic mobilities migrating cations single salt solutions, yielding: Na+ > K+ Ca2+. This order reflects different size cations. monovalent migrate dehydrated state divalent (partly) hydrated state, conclusion by Karl Fisher titrations. Both experiments showed following order: Mg2+. Since this does not correlate with mobilities, we have ion-exchange constant (Kex) found: ≈ Na+. conclude that overall is combination mobility present membrane.
منابع مشابه
Permeation and Interaction of Divalent Cations
Wehave studied the current-carrying ability and blocking action of various divalent cations in the Ca channel of Lymnaea stagnalis neurons. Changing the concentration or species of the permeant divalent cation shifts the voltage dependence of activation of the Ca channel current in a manner that is consistent with the action of the divalent cation on an external surface potential . Increasing t...
متن کاملdetermination of olanzapine and thiourea using electrodes modified by dna and film of copper-cobalt hexacyanoferrate & investigation of electro-oxidation of some catechol derivatives in the presence of 4-phenylsemicarbazid
چکیده هدف از این کار بررسی الکترواکسیداسیون کتکول و مشتقات آن در حضور 4-فنیل سمی کاربامازید بوده است اکسیداسیون کتکولها ترکیبات نا پایدار کینونها را تولید می کنند که این ترکیبات می تواند در واکنش مایکل بعنوان پذیرنده نوکلئوفیل عمل نمایند. در ادامه اکسایش کتکولهای (a-c1) را درحضور 4-فنیل سمی کاربامازید در محلول آب/استونیتریل (90/10)بوسیله ولتامتری چرخه ای و کولن متری در پتانسیل ثابت مورد بررسی ...
15 صفحه اولDivalent cations in native and reaggregated mycoplasma membranes.
The Mg(2+) content of membranes of several Mycoplasma and Acholeplasma species varied between 0.88 and 1.98 mug of Mg(2+) per mg of protein, depending on the species and on growth conditions. Ca(2+) could be detected only when it was added to the growth medium. The Mg(2+) content of isolated A. laidlawii membranes could be increased almost threefold by dialysis against 20 mm Mg(2+), whereas agg...
متن کاملThe stability of polypurine tetraplexes in the presence of mono- and divalent cations.
As with other guanine-rich sequences, poly[d(GGA)], poly[d(GA)] and poly[d(GAA)] probably form four-stranded or tetraplex structures. Thermal denaturation profiles were measured for these polymers at pH8 in the presence of Na+, NH4+, K+, Cs+, Mg2+, Ca2+ and Ba2+. For poly[d(GA)], Na+, NH4+, K+ stabilize the tetraplex to similar extents and the Tm increases with increasing ionic strength. In con...
متن کاملAdsorption of divalent cations to bilayer membranes containing phosphatidylserine
The Stern equation, a combination of the Langmuir adsorption isotherm, the Boltzmann relation, and the Grahame equation from the theory of the diffuse double layer, provides a simple theoretical framework for describing the adsorption of charged molecules to surfaces. The ability of this equation to describe the adsorption of divalent cations to membranes containing brain phosphatidylserine (PS...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Desalination
سال: 2022
ISSN: ['1873-4464', '0011-9164']
DOI: https://doi.org/10.1016/j.desal.2021.115398