in this paper, the photochemical degradation of azure-b by cu2+/s2o82− process has beenpresented. cu2+ as photocatalyst and s2o82− ion as photooxidant used in this process. atextremely low concentrations, cupric ion showed true catalytic activity in the overall process.the influence of various parameters on the performance of the treatment process has beenconsidered, such as ph, concentration o...

We describe in this article the development of a new method for the determination of rate constants of reaction of the hydroxyl radical, generated by radiolysis of water, with almost any possible molecule. It has been designed to provide a fast and reliable screening of antioxidant banks using microplates. Our particular approach is based on the use of the coumarin molecule as a competitor agai...

We describe a method of observing collisions of single femtoliter (fL) oil (i.e., toluene) droplets that are dispersed in water on an ultramicroelectrode (UME) to probe the ion transfer across the oil/water interface. The oil-in-water emulsion was stabilized by an ionic liquid, in which the oil droplet trapped a highly hydrophobic redox probe, rubrene. The ionic liquid also functions as the sup...

2014 A simplified method is presented to compute the average interaction potential of an ion reacting with a dipolar molecule at thermal collision energies. Using this potential and applying the Langevin criteria for capture collisions, an expression for the reaction rate constant is derived. The theoretical rate constant is compared with many experimental data, the results of recent trajectory...

We measure the perpendicular-to-parallel collision rate nu perpendicular parallel in laser-cooled magnetized ion plasmas, spanning the uncorrelated to correlated regimes. In correlated regimes, we measure collision rates consistent with the "Salpeter correlation enhancement" of roughly exp(Gamma), for correlation parameters Gamma less, similar 4. This enhancement also applies to fusion in dense...

preliminary investigation on antioxidative potentials of defatted fermented locust bean extract in comparison to defatted non-fermented locust bean was conducted. qualitative antioxidative assessment on the extract was accomplished by screening the phytochemical endowment, and similar bioactive components. also some antioxidative indices were quantitatively evaluated. results showed that the de...

Elongation factor T, (EF-T,) is inactivated by the arginine-specific reagent 2,3-butanedione. Excess elongation factor T, (EF-T,), the protein substrate for EFT,, protects EF-T, from this inactivation. Borate ion affects the inactivation kinetics in a manner consistent with the formation of an arginine residueebutanedione l borate complex. The butanedione inactivation is rapidly reversible in t...

Elongation factor T, (EF-T,) is inactivated by the arginine-specific reagent 2,3-butanedione. Excess elongation factor T, (EF-T,), the protein substrate for EFT,, protects EF-T, from this inactivation. Borate ion affects the inactivation kinetics in a manner consistent with the formation of an arginine residueebutanedione l borate complex. The butanedione inactivation is rapidly reversible in t...