نتایج جستجو برای: selenide

تعداد نتایج: 2194  

2014
Jack L. Sloane Marc M. Greenberg

RNA oligonucleotides containing a phenyl selenide derivative of 5-methyluridine were chemically synthesized by solid-phase synthesis. The phenyl selenide is rapidly converted to an electrophilic, allylic phenyl seleneate under mild oxidative conditions. The phenyl seleneate yields interstrand cross-links when part of a duplex and is useful for synthesizing oligonucleotide conjugates. Formation ...

2007
M. Kozielski

The paper reports on the use of phonon spectra obtained with the Raman spectroscopy for characterization of different materials. The Raman scattering spectra obtained for zinc selenide crystals, mixed crystals zinc selenide admixtured with magnesium or beryllium, oxide crystals including strontium lanthanum gallate, molecular crystals of triammonium hydrogen diseleniate and a homologous series ...

Journal: :Molecules 2015
Poonam Rajesh Prasad Harkesh B Singh Ray J Butcher

Synthesis, structure and antioxidant activity of new cyclohexene-fused spiroselenuranes and a spirotellurane is reported. Oxidation reactions of bis(o-formylcyclohex- 1-ene)selenide/bis(2-hydroxymethylcyclohex-1-ene)selenide provide the corresponding spiroselenuranes. The glutathione peroxidase-like activity of the newly synthesized compounds has been evaluated.

Journal: :Angewandte Chemie 2004
Xianhui Bu Nanfeng Zheng Xiqing Wang Bing Wang Pingyun Feng

Dense chalcogenides of Ga, In, and Tl have been extensively studied because of their intriguing stoichiometry and because many of them are semiconductors, photoconductors, or light emitters. On the other hand, while crystalline porous oxides have been known for a long time, the development of crystalline porous chalcogenides, especially selenides and tellurides, is still in its early stages. Co...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1998
H Walker J A Ferretti T C Stadtman

Selenophosphate synthetase, the Escherichia coli selD gene product, is a 37-kDa protein that catalyzes the synthesis of selenophosphate from ATP and selenide. In the absence of selenide, ATP is converted quantitatively to AMP and two orthophosphates in a very slow partial reaction. A monophosphorylated enzyme derivative containing the gamma-phosphoryl group of ATP has been implicated as an inte...

2017
Quan-Quan Zhuang Zhi-Hang Lin Yan-Cheng Jiang Hao-Hua Deng Shao-Bin He Li-Ting Su Xiao-Qiong Shi Wei Chen

Dendrite-like cobalt selenide nanostructures were synthesized from cobalt and selenium powder precursors by a solvothermal method in anhydrous ethylenediamine. The as-prepared nanocrystalline cobalt selenide was found to possess peroxidase-like activity that could catalyze the reaction of peroxidase substrates in the presence of H2O2. A spectrophotometric method for uric acid (UA) determination...

2013
A. Charnukha D. Pröpper A. N. Yaresko

The recent discovery of intercalated iron-selenide superconductors [1] has stirred up the condensed-matter community accustomed to the proximity of the superconducting and magnetic phases in various cuprate and pnictide superconductors. Never before has a superconducting state with a transition temperature as high as 30 K been found to coexist with such an exceptionally strong antiferromagnetis...

Journal: :Synlett 2012

Journal: :The Journal of biological chemistry 2007
Agathe Tarze Marc Dauplais Ioana Grigoras Myriam Lazard Nguyet-Thanh Ha-Duong Frédérique Barbier Sylvain Blanquet Pierre Plateau

Administration of selenium in humans has anticarcinogenic effects. However, the boundary between cancer-protecting and toxic levels of selenium is extremely narrow. The mechanisms of selenium toxicity need to be fully understood. In Saccharomyces cerevisiae, selenite in the millimolar range is well tolerated by cells. Here we show that the lethal dose of selenite is reduced to the micromolar ra...

Journal: :Chemistry 2012
Yurdanur Türker Cüneyt Karakaya Ömer Dag

Mesoporous silica metal oxide (ZnO and CdO) thin films have been used as metal ion precursors to produce the first examples of mesoporous silica metal sulfide (meso-SiO(2) @ZnS, meso-SiO(2) @CdS) or silica metal selenide (meso-SiO(2) @ZnSe, meso-SiO(2) @CdSe) thin films, in which the pore walls are made up of silica and metal sulfide or metal selenide nanoflakes, respectively. A gentle chemical...

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