نتایج جستجو برای: sulfoxide

تعداد نتایج: 9050  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2002
Gregory V Kryukov R Abhilash Kumar Ahmet Koc Zhaohui Sun Vadim N Gladyshev

Selenoprotein R (SelR) is a mammalian selenocysteine-containing protein with no known function. Here we report that cysteine homologs of SelR are present in all organisms except certain parasites and hyperthermophiles, and this pattern of occurrence closely matches that of only one protein, peptide methionine sulfoxide reductase (MsrA). Moreover, in several genomes, SelR and MsrA genes are fuse...

2006
Oliver C. Mullins

Sulfur chemical structures present in crude oil products such as petroleum asphaltenes, resins, and maltenes obtained from two different oils have been determined using X-ray absorption nearedge structure (XANES) spectroscopy. Maltenes are pentane soluble portions, resins are pentane insoluble and heptane soluble portions, and asphaltenes are heptane insoluble portions of crude oil. The sulfur ...

2009
Xu Zhi-Guang Liu Hai-Yang Gu Guo-Bang Xu Xuan Zeng Yun-Xiu

The mol-ecule of the title compound, C(15)H(24)OS, shows S conformations for the S atom and the asymmetric C atom of the isooctyl group. The long axes of the mol-ecules are directed along the c axis. In the crystal structure, the mol-ecules are linked by weak inter-molecular bifurcated C-H⋯O hydrogen bonds.

Journal: :Science 1980
A J Sytkowski A J Salvado G M Smith C J McIntyre N J deBoth

Clonal lines of Rauscher erythroleukemia cells exhibited selective responses to two inducers of differentiation, erythropoietin and dimethyl sulfoxide. There were substantial quantitiative differences between clones that reponded to both inducers. Several clones differentiated only in response to erythropoietin. Erythropoietin stimulated cell proliferation and differentiation whereas dimethyl s...

2008
Martin D. Rudd Gregory Kokke Sergey V. Lindeman

The structure of the title salt, 2C(2)H(7)OS(+)·Br(6)Te(2-)·2C(2)H(6)OS, displays O-H⋯O hydrogen bonding between one protonated dimethyl sulfoxide mol-ecule and a neighboring dimethyl sulfoxide mol-ecule, and an octa-hedral geometry for the Te atom; the latter is situated on a center of inversion.

Journal: :The Journal of organic chemistry 2003
Keith B Thomas Alexander Greer

A liquid-phase photolysis of 1,2-benzodiphenylene sulfoxide, 1, and dibenzothiophene sulfoxide, 2, was used to generate atomic oxygen [O(3P)] or an equivalent active oxygen species. The reaction for sulfoxide photodeoxygenation was similar to a microwave discharge method for generating O(3P) atoms in the condensed phase (Zadok, E.; Rubinraut, S.; Mazur, Y. J. Org. Chem. 1987, 52, 385-90). Sulfo...

Journal: :The Journal of pharmacology and experimental therapeutics 1999
J C Stevens T L Domanski G R Harlow R B White E Orton J R Halpert

RPR 106541 (20R-16alpha,17alpha-[butylidenebis(oxy)]-6al pha, 9alpha-difluoro-11beta-hydroxy-17beta-(methylthio)androst a-4-en-3-one) is an airway-selective steroid developed for the treatment of asthma. Two metabolites produced by human liver microsomes were identified as R- and S-sulfoxide diastereomers based on liquid chromatography/mass spectrometry analysis, proton nuclear magnetic resonan...

2004
Hoh-Gyu Hahn Kee Dal Nam Seung Hoon Cheon

Rearrangements of 1,3-oxathiolane sulfoxides 8 and 9 in the presence of base are described from a mechanistic viewpoint of sigmatropic and elimination reactions. In the presence of triethylamine the (Z)sulfoxide 8 gave the corresponding thiolsulfinate 10 by way of dimerization of the sulfenic acid intermediate 2 at room temperature while the (E)-sulfoxide 9 was recovered even after refluxing in...

Journal: :The Biochemical journal 2011
Panchanan Maiti Roberto Piacentini Cristian Ripoli Claudio Grassi Gal Bitan

Aβ (amyloid β-peptide) is believed to cause AD (Alzheimer's disease). Aβ42 (Aβ comprising 42 amino acids) is substantially more neurotoxic than Aβ40 (Aβ comprising 40 amino acids), and this increased toxicity correlates with the existence of unique Aβ42 oligomers. Met³⁵ oxidation to sulfoxide or sulfone eliminates the differences in early oligomerization between Aβ40 and Aβ42. Met³⁵ oxidation t...

Journal: :The Journal of biological chemistry 2000
S D Garton C A Temple I K Dhawan M J Barber K V Rajagopalan M K Johnson

Resonance Raman spectroscopy has been used to define active site structures for oxidized Mo(VI) and reduced Mo(IV) forms of recombinant Rhodobacter sphaeroides biotin sulfoxide reductase expressed in Escherichia coli. On the basis of (18)O/(16)O labeling studies involving water and the alternative substrate dimethyl sulfoxide and the close correspondence to the resonance Raman spectra previousl...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید