We investigate the dependence of the photovoltaic performance of dye-sensitized solar cells on the cations with different charge densities, such as lithium (Li(+)), sodium (Na(+)), potassium (K(+)), and dimethylimidazolium (DMI(+)). The efficiencies of light harvesting, electron injection and charge collection were evaluated to clarify the influence of cation selection on photocurrent generatio...

Accumulation of Cl(-) by excised barley roots, as of K(+), approaches a maximum level at which the ion influx and efflux rates become equal. The rate of Cl(-) influx at this equilibrium is close to the initial rate while the efflux rate increases with time from zero to equality with influx. The Cl(-) fluxes are independent of simultaneous exchange flux of the cations, but depend on the nature a...

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 ...

Light-induced lipophilic porphyrin/aqueous acceptor charge separation across a single lipid-water interface can pump protons across the lipid bilayer when the hydrophobic weak acids, carbonylcyanide m-chlorophenylhydrazone and its p-trifluoromethoxyphenyl analogue, are present. These compounds act as proton carriers across lipid bilayers. In their symmetric presence across the bilayer, the posi...

The descending contralateral movement detector (DCMD) is a high-performance interneuron in locusts with an axon capable of transmitting action potentials (AP) at more than 500 Hz. We investigated biophysical mechanisms for fidelity of high-frequency transmission in this axon. We measured conduction velocities (CVs) at room temperature during exposure to 10 mmol/L cadmium, a calcium current anta...

The colicin A lysis protein, Cal, is synthesized at the same time as colicin A by Escherichiu coli harbouring plasmid pColA after induction by mitomycin C. Its function in the induced bacteria involves the release of colicin A, quasi-lysis, the death of the producing cells and the activation of the outer membrane phospholipase A. We have found that these various functions are affected different...