نتایج جستجو برای: Sulfite ester

تعداد نتایج: 41091  

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 1996
farajollah mohanazadeh yousef ranjbar

deprotection of phosphate, phosphate, and sulfite esters by silica chloride is described. silica chloride is a mild, selective, and effective reagent for cleavage of benzyl and t-butyl esters of the above compounds.

Journal: :The Journal of biological chemistry 1973
M J Murphy L M Siegel H Kamin D Rosenthal

The novel heme prosthetic group of Escherichia colt’ NADPH-sulfite reductase (EC 1.8.1.2) has been identified as an iron tetrahydroporphyrin of the isobacteriochlorin type (adjacent pyrrole rings reduced) with eight carboxylic acid side chains. The number of carboxyl groups was established by the following experiments. Esterification with 14CH30H resulted in incorporation of 7.4 moles of 14C pe...

2012
Rick C White Benny E Arney Heiko Ihmels

The photochemistry of a phenyl and 1,2-diphenyl substituted sulfite ester is reported. The performance of photoreactions under relatively mild reaction conditions enables the detection of products that have not been observed in previous studies. It is concluded that, complementary to the initially proposed carbene intermediates, diradicals may also be considered.

Farajollah Mohanazadeh, Yousef Ranjbar

Deprotection of phosphate, phosphate, and sulfite esters by silica chloride is described. Silica chloride is a mild, selective, and effective reagent for cleavage of benzyl and t-butyl esters of the above compounds.

Journal: :Nucleic acids research 1998
A Mazumder M Majlessi M M Becker

We describe a high throughput microtiter-based assay to measure binding of oligodeoxyribonucleotides to nucleic acid targets. The assay utilizes oligodeoxyribonucleotide probes labeled with a highly chemiluminescent acridinium ester (AE). Reaction of AE with sodium sulfite renders it non-chemiluminescent. When an AE-labeled probe hybridizes to a target nucleic acid AE is protected from reaction...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2008
mohammad hosseini baharak bahmani fatollah moztarzadeh mohammad rabiee

in this research, an enzyme modified electrode has been produced during the electropolymerization of aniline through incorporation of sulfite oxidase into a conducting polymer. then the bioelectrochemical response of resulted sulfite biosensor was investigated at different experimental conditions. study of  the stability of the resulted sulfite biosensor revealed that formation of a passive fil...

Journal: :Current Chemical Biology 2021

Background: Sago palm is an important agricultural starch-producing crop in Malaysia. The trunk of sago responsible for the starch to reach maturity harvesting after ten years. However, there are palms that fail develop thier 17 years being planted. This known as a stressed “non-trunking” palm, which reduces economic value palms. Objective: study was initiated compare differences metabolite exp...

2016
Murugesan Velayutham Craig F. Hemann Arturo J. Cardounel Jay L. Zweier

In humans, sulfite is generated endogenously by the metabolism of sulfur containing amino acids such as methionine and cysteine. Sulfite is also formed from exposure to sulfur dioxide, one of the major environmental pollutants. Sulfite is used as an antioxidant and preservative in dried fruits, vegetables, and beverages such as wine. Sulfite is also used as a stabilizer in many drugs. Sulfite t...

2012
Zongliang Xia Kaile Sun Meiping Wang Ke Wu Hua Zhang Jianyu Wu

Sulfite oxidase (SO) plays an important role in sulfite metabolism. To date, the molecular mechanisms of sulfite metabolism in plants are largely unknown. Previously, a full-length cDNA of the putative sulfite oxidase gene from maize (ZmSO) was cloned, and its response to SO(2)/sulfite stress at the transcriptional level was characterized. In this study, the recombinant ZmSO protein was purifie...

Journal: :Applied and environmental microbiology 2008
Eric F Johnson Biswarup Mukhopadhyay

Coenzyme F(420)-dependent sulfite reductase (Fsr) of Methanocaldococcus jannaschii, a sulfite-tolerant methanogen, was expressed with activity in Methanococcus maripaludis, a sulfite-sensitive methanogen. The recombinant organism reduced sulfite to sulfide and grew with sulfite as the sole sulfur source, indicating that Fsr is a sulfite detoxification and assimilation enzyme for methanogens and...

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