Acetate is a major product of fermentation processes and an important substrate for sulfate reducing bacteria and methanogenic archaea. Most studies on acetate catabolism by sulfate reducers and methanogens have used pure cultures. Less is known about acetate conversion by mixed pure cultures and the interactions between both groups. We tested interspecies hydrogen transfer and coexistence betw...

a highly efficient and environmentally friendly synthesis of various 1,5-diaryl-3-(arylamino)-1h-pyrrol-2(5h)-ones catalyzed by 1-methylpiperidinium hydrogen sulfate via one-pot cyclo-condensation reaction ofaldehydes, amines and ethyl 2-oxopropanoate under ambient conditions has been explored. the presentmethodology offers several advantages such as good yields, simple procedure, shorter react...

In the asymmetric unit of the title hydrated salt, 2C6H6N3 (+)·SO4 (2-)·2H2O, there are two independent sulfate ions, one lying on a twofold axis, and the other in a general position. There are three independent benzotriazolium cations and three independent water mol-ecules. The sulfate ion in a general position forms hydrogen-bonded chains of stoichiometry SO4 (2-)·3H2O in the b-axis direction...

Hydrolysis of pyrosulfate was studied by electrochemical experiments and quantum mechanical calculations, revealing Gibbs transfer energies for pyrosulfate, hydrogen sulfate anions at the liquid-liquid interface.

Studies on water electrolysis are in permanent development to improve its processes with electrodes and electrolytes that offer lower overpotential values. This work uses an ionic liquid (IL) – tetrafluoroborate of 3-triethylammonium-propane sulfonic acid (TEA-PS.BF4) as electrolyte studies the effect different electroactive cathode materials hydrogen production, such platinum (Pt), nickel (Ni)...

a convenient and efficient direct protocol for the preparation of antibacterial azo dyes by the reaction of 2-naphthol with aromatic amines in the presence of catalytic amount of n-methyl-2-pyrrolidonium hydrogen sulfate ([h-nmp]hso4) was carried out under solvent free conditions. this method has some advantages such as: easy work-up and easy separation of catalyst from the reaction mixture. th...

a series of 2-amino pyridine-3-carbinitrile derivatives incorporated coumarin moiety has developed via multicomponent condensation of 3-acetyl-2h-chromen-2-one, arylaldehydes, malononitrile and ammonium acetate utilizing brønsted acidic ionic liquid, (4-sulfobutyl)tris(4-sulfophenyl)phosphonium hydrogen sulfate as catalyst under solvent-free conditions. good yields, short reaction times, straig...

To develop a better understanding of respiration by sulfate-reducing bacteria, we examined transcriptional control of respiratory genes during growth with lactate or hydrogen as an electron donor. RNA extracts of Desulfovibrio desulfuricans subsp. aestuarii were analyzed by using random arbitrarily primed PCR. RNA was reverse transcribed under low-stringency conditions with a set of random prim...

The Opalinus Clay formation will host geological nuclear waste repositories in Switzerland. It is expected that gas pressure will build-up due to hydrogen production from steel corrosion, jeopardizing the integrity of the engineered barriers. In an in situ experiment located in the Mont Terri Underground Rock Laboratory, we demonstrate that hydrogen is consumed by microorganisms, fuelling a mic...

The PAQUES Bio Systems’ core technology, marketed under the name THIOPAQ, consists of various high-rate biological processes for metal-sulfur-water systems, complemented with common solid/liquid and gas separation steps. Sulfur species are converted to sulfide, which is a valuable component as it can be used for metals reduction and precipitation. Selective recovery of valuable metals can be em...