The adsorptive stripping voltammetric detection of nickel and cobalt in water samples at metal film electrodes has been extensively studied. In this work, a novel, environmentally friendly, metal-free electrochemical probe was constructed for the ultra-trace determination of Ni2+ in water samples by Adsorptive Cathodic Stripping Voltammetry (AdCSV). The electrochemical platform is based on the ...

The accumulation of <C-taurine in the lens was studied by culture technique under a variety of conditions. This compound accumidates in the ocular lens against a concentration gradient by a process lohich can be readily saturated. The saturation mechanism does not conform to Michaelis-Menten kinetics. The transport process is highly dependent upon temperature (Qio = 5), and derives the energy r...

In water electrolyzers, polymer electrolyte membranes (PEMs) such as Nafion can accumulate cations stemming from salt impurities in the supply, which leads to severe cell voltage increases. This combined experimental and computational study discusses influence of sodium ion poisoning on ionic conductivity transport a thereon based electrolysis cell. Conductivities aqueous solutions with same am...

We study the influence of laser repetition rate on generation low-density channels air left in path femtosecond filament. At high rates, we observe formation a permanent millimeter-wide channel that exceeds depth and width transient depletion due to single also show this cumulative effect decreases breakdown voltage between two electrodes can alter discharge. By comparing pure nitrogen, an accu...

Numerous electron-opaque deposits appear in the SR of the relaxed smooth muscle cells of the guinea pig Taenia coli that had been treated, before fixation, with a depolarizing medium containing oxalate to precipitate calcium ions in situ. X-ray spectra obtained by spot and line-scanning analyses of these deposits in situ show characteristic calcium signals, thus providing direct evidence for ca...

The paper deals with a detailed study of He-filled cavity ensemble development in ODS-EUROFER steel implanted 10 keV helium ions to high peak concentration 8.5 × 103 appm both and without simultaneous irradiation 4 MeV gold ions, which allowed us strongly vary the ratios dpa/He introduction. subsequent transmission electron microscopy examination reveals excellent radiation stability He-implant...

For understanding the operation of perovskite solar cells and light-emitting diodes, knowledge dielectric properties is indispensable. The perovskites are frequency dependent due to presence moving ions, which complicates interpretation impedance spectra. Using Au/CsPbI2Br/Au capacitors with varied layer thickness as a model system, we demonstrate that in dark, an extended Maxwell circuit consi...

Radioisotopes (particularly (22)Na, (24)Na, (42)K, and (86)Rb) have been used for many decades to trace the fluxes and accumulation of sodium and potassium ions in plant tissues. In this article, standard procedures for the tracing of ion fluxes are described, with emphasis on special problems encountered when examining K(+) and Na(+) transport under salinity conditions. We focus in particular ...