The purpose of this work was to synthesize and characterize the thiatetraaza macrocycle 1-thia-4,7,10,13-tetraazacyclopentadecane ([15]aneN4S). Its acid-base behaviour was studied by potentiometry at 25 °C and ionic strength 0.10 M in KNO3. The protonation sequence of this ligand was investigated by 1H-NMR titration that also allowed the determination of protonation constants in D2O. Binding st...

With green technologies, the damages caused by agro-technological wastes to environment are eliminated. In our study, it was aimed both prevent harm of olive oil waste and produce lipase enzyme, which is an important biotechnological product.. E. faecium E68 obtained from milk dairy products used in production enzyme. developed medium containing 10% waste, pH6.5, at 37oC with 120 rpm agitation ...

An environmentally safe, efficient, and economical microwave-assisted technique was selected for the production of silver nanoparticles (AgNPs). To prepare uniformly disseminated AgNPs, xanthan gum (XG) utilized as both a reducing capping agent. UV–Vis spectroscopy used to characterize formed XG-AgNPs, with absorption band regulated at 414 nm under optimized parameters. Atomic force microscopy ...

Photoredox processes induced by metal-tometal charge transfer (MMCT) excitation have a t­ tracted much attention in recent years [1-4]. These processes may be exploited for applications in arti­ ficial photosynthesis and photocatalysis [5, 6], They also facilitate our understanding of optical and thermal electron transfer in general [7, 8], A point of particular interest is the relationship be­...

This is the first report investigating transformation of gaseous elemental mercury (GEM), major form airborne mercury, into oxidized in bulk liquid, a possible sinking pathway atmospheric GEM clouds, fog, rain droplets and ocean spray. A 100–150 ng m−3 standard gas, 50–150 times higher concentration than typical concentration, was introduced 2.5 L rectangular glass vessel, at bottom which 0.5 u...

A new selective reagent was used for simultaneous determination of mercury and palladium in real samples with their different kinetic spectrophotometric properties. The method is based on the difference in the rate of the oxidation reaction of the recently synthesized reagent, nitro benzoyl diphenylmethylen phosphorane (N-BDMP), with Hg2+ and Pd2+. The kinetic profiles were monitored and record...

4F2hc is an almost ubiquitous transmembrane protein in mammalian cells; upon expression in Xenopus laevis oocytes, it induces amino acid transport with characteristics of system y+L. Indirect evidence fostered speculation that function requires the association of 4F2hc with another protein endogenous to oocytes and native tissues. We show that expression of system y+L-like amino acid transport ...

We have compared the response of proton and water transport to oxytocin treatment in isolated frog skin and urinary bladder epithelia to provide further insights into the nature of water flow and H+ flux across individual apical and basolateral cell membranes. In isolated spontaneous sodium-transporting frog skin epithelia, lowering the pH of the apical solution from 7.4 to 6.4, 5.5, or 4.5 pro...

A new Schiff base ligand, 2,2'-{pyridine-2,6-diylbis[nitrilo(E)methylylidene]}bis(4 bromophenol),has been synthesized by reaction of the 2,6-diamino pyridine with 5-bromo salicylaldehyde at ethanolunder refluxing. The structure of the synthesized compound resulted from the IR, 1HNMR, MS andUV spectroscopy and elemental analysis data. Formation Constant (kf) value of it’s complexes withCu2+, Ni2...