There is very little information in the literature concerning the production of mercaptans by microorganisms. Mercaptan production has been reported for anaerobes (Rettger, J. Biol. Chem. 2:71, 1906), fungi [Challenger, Sci. Progr. (London) 35:396, 1947], Escherichia coli (Fromageot and Moubacher, Enzymologia 2:121, 1937), and Proteus vulgaris (Masatashi, Biochem. Z. 136:198, 1923). However, Ma...

The interaction of thioglycolic acid (HSCH(2)COOH) with the Au(111) surface is investigated, and it is found that at the low coverage the molecule lies down on the substrate. If the mercaptan-hydrogen atom is eliminated, the resulting SCH(2)COOH molecule is randomly oriented on the surface. If the carboxylic acid group in the HSCH(2)COOH molecule is deprotonated instead, the HSCH(2)COO(-) molec...

use of zinc and iron oxide are common in the desulfurization process from natural gas. in thisresearch, after determinations of the size and specifications through tem and xrd for each of the metaloxides, two different size ratios were used, 0.66 for zinc oxide and 0.142 for iron oxide. further, absorption of sulfur compounds in gas (hydrogen sulfide (h2s), carbonyl sulfide (cos), methyl mercap...

Praseodymium (Pr)-promoted MCM-41 catalyst was investigated for the catalytic decomposition of methyl mercaptan (CH3SH). Various characterization techniques, such as X-ray diffraction (XRD), N2 adsorption–desorption, temperature-programmed desorption ammonia (NH3-TPD) and carbon dioxide (CO2-TPD), hydrogen reduction (H2-TPR), photoelectron spectrometer (XPS), were carried out to analyze physico...

Proanthocyanidins (PA) in Senna alata leaves were investigated by thiolysis with benzyl mercaptan, LC-MS and NMR and consisted of almost pure propelargonidins with <6% procyanidins, had B-type linkages and a mean degree of polymerisation of three. Epiafzelechin was the major flavan-3-ol subunit (>94%) and epicatechin a minor constituent (6.4%) in residual PA and mainly detected as an extension ...

Gold surfaces were modified by benzyl-mercaptan (BM) and then partly replaced with benzenethiol (BT), which formed binary self-assembled monolayers (SAM). Initially BT randomly replaced BM in the monolayer, but at long exchange times >15 nm radius domains were observed with specific relative composition of BT and BM.