نتایج جستجو برای: organo sulfur compounds

تعداد نتایج: 256276  

2012
Antoaneta Pavlova Pavlina Ivanova Teodora Dimova

Determination of concentrations of sulfur compounds in different petroleum samples is a true analytical challenge. Only analytical procedures based on gas chromatography can meet the sensitivity and accuracy requirements dictated by up-to-date petroleum industry. The objective of this work is to develop the method for the quantifying of sulfur compounds in petroleum hydrocarbon streams. The opt...

Journal: :Chemical communications 2016
D A Boyd C C Baker J D Myers V Q Nguyen G A Drake C C McClain F H Kung S R Bowman W Kim J S Sanghera

A novel method combining elemental sulfur and selenium was developed, yielding crystalline sulfur-selenium compounds. The compounds were melted, and an organic comonomer added. Once the organic comonomer was consumed, the viscous compound was vitrified and allowed to cool yielding organic-inorganic hybrid polymers that are termed Organically Modified Chalcogenide (ORMOCHALC) polymers.

Journal: :Dalton transactions 2009
Roberta Bomparola Robert P Davies Stefan Hornauer Andrew J P White

The organo-amidocuprate [Cu(2)Li(2)Mes(2)(N(CH(2)Ph)(2))(2)] is solvated by thf to yield the monomeric contact ion pair complex [MesCuN(CH(2)Ph)(2).Li(thf)(3)] in which the Li cation is bound to the amido nitrogen; this behaviour differs significantly from that observed in diorganocuprates which favour solvent separate ion pairs.

Journal: :Molecules 2014
Shu-Fen Tu Rosa Huang Liu Yuan-Bin Cheng Yu-Ming Hsu Ying-Chi Du Mohamed El-Shazly Yang-Chang Wu Fang-Rong Chang

Four new sulfur-containing compounds, named clinamides A-C (1-3), and 2-cis-entadamide A (4), were isolated together with three known compounds from the bioactive ethanol extract of the aerial parts of Clinacanthus nutans. These secondary metabolites possess sulfur atoms and acrylamide functionalities. The structures of the isolated components were established by interpretation of their spectro...

2013
Hideki Amii Aiichiro Nagaki Jun-ichi Yoshida

Organo-fluorine compounds are the substances of considerable interest in various industrial fields due to their unique physical and chemical properties. Despite increased demand in wide fields of science, synthesis of fluoro-organic compounds is still often faced with problems such as the difficulties in handling of fluorinating reagents and in controlling of chemical reactions. Recently, flow ...

Journal: :Journal of chromatographic science 2006
Rosario Ruiz-Guerrero Colombe Vendeuvre Didier Thiébaut Fabrice Bertoncini Didier Espinat

The monitoring of total sulfur content and speciation of individual sulfur-containing compounds in middle distillates is required for efficient catalyst selection and for a better understanding of the kinetics of the reactions involved in hydrotreament processes. Owing to higher resolution power and enhanced sensitivity, comprehensive two-dimensional gas chromatography (GCxGC) hyphenated to sul...

2002
F. M. Miller G. L. Young M. von Seebach

This report presents the chemical and physical factors governing the generation of sulfur dioxide (SO2), its transformation into other sulfur compounds, and the removal of sulfur oxides within the cement kiln system. Sulfur in cement kilns is derived from both kiln feed and from the kiln fuel. The form of the sulfur dictates the location in the kiln where the SO2 generation takes place. Sulfur ...

Journal: :Biotechnology and bioengineering 2013
Roberto A Bobadilla Fazzini Maria Paz Cortés Leandro Padilla Daniel Maturana Marko Budinich Alejandro Maass Pilar Parada

The prokaryotic oxidation of reduced inorganic sulfur compounds (RISCs) is a topic of utmost importance from a biogeochemical and industrial perspective. Despite sulfur oxidizing bacterial activity is largely known, no quantitative approaches to biological RISCs oxidation have been made, gathering all the complex abiotic and enzymatic stoichiometry involved. Even though in the case of neutrophi...

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