One of the basic mechanisms of photo-bio-modulation is the acceleration of electron transfer by electromagnetic radiation in the visible and near infra-red region of the spectrum [1,2]. In the presence of an electron acceptor such as molecular oxygen (O2), electron transfer reduces O2 to the super-oxide anion O2 , which subsequently dismutates into hydrogen peroxide (H2O2) [3]. Both O2 and H2O2...

The oxygen permeation performance of Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) mixed-conducting multichannel hollow fiber (MCMHF) membranes was improved by surface modification via spin-spraying of a La0.6Sr0.4CoO3−δ (LSC) porous layer. At 1173 K, the oxygen permeation flux of the modified membranes was clearly enhanced and reached 9.68 mL·cm−2·min−1, which is a remarkable high value in the field of mixe...

Experiments giving evidence of active Na and Cl ion fluxes across large canine blood vessel walls (aorta, vena cava) in vitro have been presented. The information has been obtained using ion tracer techniques after Ussing and with diffusion cells of the Hogben type. The available data suggest that the membranes are satisfactorily oxygenated by the bathing solutions saturated with oxygen at atmo...

The mitochondria of aerobically grown yeast, in common with those of higher organisms, contain the terminal electron transport, oxidative phosphorylation, and citric acid cycle enzymes of the cell (9). However, unlike higher organisms, the yeast cell is capable of both aerobic and anaerobic growth, and, as was reported some years ago, the b and a cytochromes are not synthesized in the absence o...

This work is focused on the study of possible changes in the electrochemical transport parameters of cellulose membranes due to the effect of ionising radiation. A cellophane membrane (membrane C5) was irradiated with a dose of 80 Gy (membrane Ir80) and differences in the electrochemical parameters for pristine and irradiated samples are studied. Salt permeability, ion transport number, permsel...

The role of water molecules in the selective transport of potassium ions across cell membranes is important. Experimental investigations of valinomycin-water interactions remain huge challenge due to the poor solubility of valinomycin in water. Herein, we removed this experimental obstacle by introducing gaseous water and valinomycin onto a Cu(111) surface to investigate the hydration of valino...

Oxygen uptake is essential for active ion transport across the isolated silkworm midgut as well as across other isolated epithelial membranes such as the frog skin and toad bladder. The study of the chemical relationship between these two processes in the skin and bladder has been rewarding. The short-circuit current across the isolated frog skin and toad bladder is accounted for entirely by th...