-Putrefactive hydrogen sulfide production in the upper 4 cm of sediment in two small freshwater and eutrophic Southeast Michigan, U.S.A., lakes ranged from 0.13 to 1.51 with an average of 0.46 mg S l-~ day-~. Sulfate reductive production of hydrogen sulfide at the same sites ranged from 0.7 to 3.2 with an average of 1.54 mg S 1~ dayt. Putrefactive hydrogen sulfide production represented 5.1-53°...

In this research, we have developed cheap recyclable and task-specific acidic ionic liquids (AILs) 1-hydrogen-3-methylimidazolium hydrogen sulfate [Hmim]HSO4, 1-hydrogen-3-methylimidazolium chloride [Hmim]Cl, 2-pyrrolidonium hydrogensulfate [Hnhp]HSO4 and applied them in acid catalyzed synthesis of quinoxaline derivatives from 1,2-phenylendiamines and 1,2-dicarbonyl compounds. The products coul...

an efficient, mild and environmentally friendly method was developed for the strecker reaction to synthesize α-aminonitriles in the presence of methyl imidazolium hydrogen sulfate ([hmim][hso4]) as an efficient catalyst. these syntheses were performed via a one-pot three-component condensation of aldehydes (or ketones), amines, and trimethylsilyl cyanide under mild and solvent free conditions.

Abstract Triethylammonium dichloro[ N -[(2-oxyphenyl)methylidene]valinato]-phenyl-tin( iv ) was prepared and characterized by spectroscopic methods single crystal X-ray crystallography. The compound consists of a triethylammonium cation tin complex as anion. is composed tridentate O,N,O -Schiff base ligand coordinated to SnCl 2 Ph unit. atom in distorted octahedral coordination geometry. NMR st...

Cotton cationization with low molecular weight or polymeric cationic modifiers allows the effective dyeing of cotton substrates reactive dyes under salt-free and more environmentally friendly conditions. The current work focuses on spectroscopic study intermolecular interactions, which dictate physicochemical process associated fabric dyeing. Water-soluble copolymers vinyl benzyl chloride (VBC)...

Sulfate-reducing bacteria, like Desulfovibrio vulgaris Hildenborough, use the reduction of sulfate as a sink for electrons liberated in oxidation reactions of organic substrates. The rate of the latter exceeds that of sulfate reduction at the onset of growth, causing a temporary accumulation of hydrogen and other fermentation products (the hydrogen or fermentation burst). In addition to hydroge...