نتایج جستجو برای: oxidation of sulfides

تعداد نتایج: 21171920  

Journal: :Environmental toxicology and chemistry 2002
Adrian M Gonzalez

The susceptibility of some components of sediment acid-volatile sulfide (AVS) to chemical oxidation is a critical factor impacting accurate measurement of AVS in sediment samples. This well-documented susceptibility to oxidation led to the requirement for oxygen-free conditions in the analytical method developed for AVS. In light of this acute potential to oxidize, the serendipitous finding tha...

Journal: :Protein engineering, design & selection : PEDS 2013
Janna Shainsky Kalia Bernath-Levin Sivan Isaschar-Ovdat Fabian Glaser Ayelet Fishman

Nitrobenzene dioxygenase (NBDO) from Comamonas sp. is shown here to perform enantioselective oxidation of aromatic sulfides. Several para-substituted alkyl aryl sulfides were examined and it was found that the activity of the enzyme is dependent on the size of the substrate. Saturation mutagenesis was performed on different residues in the active site in order to improve activity and selectivit...

رحیم پور بناب, حسین , روح شهباز, جمشید , شکاری فرد, علی ,

In the Ardakan barite ore deposits, two groups of copper ore minerals have been identified in the barite veins. The hypogene ore minerals consist of chalcopyrite and chalcocite, which are associated with pyrite. The Supergene ore minerals are mainly composed of secondary Cu-sulfides (such as covellite, yarrowite and anilite), Cu-carbonates (malachite and azurite) and Cu-oxides (cuprite). Chalco...

Ahmad Shaabani, Ayoob Bazgir, Hamid Reza Safaei

NaBrO3 combined with NH4Cl is found to be an efficient reagent for the transformation of sulfides into sulfoxides in aqueous and under mild conditions.

Journal: :Journal of Organic Chemistry 2021

An efficient electrochemical flow process for the selective oxidation of sulfides to sulfoxides and sulfones N-cyanosulfoximines has been developed. In total, 69 examples sulfoxides, sulfones, have synthesized in good excellent yields with high current efficiencies. The synthesis was assisted facilitated through a supporting electrolyte-free, fully automated protocol that highlights advantages ...

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