Families of symmetric, ionic, tetracatenar mesogens are described based on a rigid, N-phenylpyridinium core, prepared as their triflimide, octyl sulfate and dodecyl salts for range terminal chain lengths. The mesomorphism the individual series is before comparison drawn between different families then more broadly with (i) neutral materials (ii) related bis(3,4-dialkoxystilbazole)silver(I) salt...

This study aimed to evaluate the efficacy of silver sulfate (AgSO4) as a toxicant in goldfish (Carassiusauratus). One hundred and forty-seven live specimens of C. auratus were obtained and exposed to 1, 10, 100, 500, 1000 and 2000 ppm of AgSO4for 96 hours. There was one control group (no AgSO4) and three replicates. The physicochemical properties of water and the following parameters were const...

objective: pyocyanine plays an important role in the pathogenesis of pseudomonas aeruginosa, (p. aeruginosa) and is known to have inhibitory and bactericidal effects. this study has aimed to detect the phenazine biosynthetic operon (phz abcdefg) and two phenazine modifying genes (phzm and phzs) by polymerase chain reaction (pcr) and detection of its possible protein bands by sodium dodecyl sulf...

A characteristic feature of apoptosis is the degradation of genomic DNA into discrete oligonucleosome fragments by the action of a Ca2+/Mg2+-dependent endonuclease. The endonuclease relevant to apoptosis has not been identified, but several possible enzymes have been described (2,4–6). One technique to identify potential nuclease activities is zymography, where protein extracts are resolved by ...

alkali and alkaline earth metals hydrogen sulfate catalyzed the one-pot three component condensation reactions of aldehydes, 1,3-dicarbonyl compounds and urea or thiourea under solvent-free conditions leading to 3,4-dihydropyrimidin-2(1h)-ones in high yields at 80 °c. our results showed that biginelli reaction not only is ph dependent, but the cation of catalyst plays an important role.

BACKGROUND The use of a boiling mixture of hydriodic acid, hypophosphorous acid, and hydrochloric acid to reduce any variety of sulfur compounds has been in use in various applications since the first appearance of this method in the literature in the 1920's. In the realm of sulfur geochemistry, this method remains a useful, but under-utilized technique. Presented here is a detailed description...