Borohydride Oxidation Reaction
Mostrando 1-12 de 12 artigos, teses e dissertações.
-
1. Addition of CeO2 Nanorods in PtSn-Based Electrocatalysts for Ethanol Electrochemical Oxidation in Acid Medium
This work describes the preparation of Pt/C, PtxSny/C and PtxSny(CeO2 nanorods/C) nanoparticle catalysts synthesized by the chemical reduction method via sodium borohydride for the ethanol oxidation reaction. Using X-ray diffractogram analysis, it was verified that no alloy formation occurred between platinum (Pt) and tin (Sn). The distribution of the nanopa
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
-
2. ESTUDO DA REAÇÃO DE REDUÇÃO DE OXIGÊNIO SOBRE ELETRODOS À BASE DE TETRAMETÓXIFENILPORFIRINAS PARA APLICAÇÕES EM CÉLULAS A COMBUSTÍVEL DE BOROIDRETO DIRETO / STUDY OF THE OXYGEN REDUCTION REACTION ON ELECTRODES BASED OF TETRAMETÓXIFENILPORFIRINAS FOR APPLICATIONS IN CELLS FUEL BOROHYDRIDE DIRECT
The oxygen reduction reaction (ORR) in 1.0 mol/L KOH solutions catalyzed by FeTMPP/C and CoTMPP/C was investigated in absence and presence of BH4- anions with concentrations varying from 10-7 to 1.0 mol/L. Similar cyclic voltammetry and rotating disk electrode experiments have been also performed the commercial E-TEK Pt/C electrocatalysts. In absence of BH4-
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/06/2012
-
3. Eletrocatálise das reações catódica e anódica em célula a combustível alcalina de borohidreto direto / Electrocatalysis of anodic and cathodic reaction in direct borohydride fuel cell
A reação de redução de oxigênio (RRO) e a reação de oxidação do borohidreto (ROB) foram estudadas em eletrólito alcalino em eletrodos formados por diversos tipos de óxidos de manganês dopados com Ni (II) dispersos sobre carbonos Monarch 1000, MM225 e E350. As técnicas de caracterização físico-química foram difração de raios X (DRX), micros
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/10/2011
-
4. Reduction of iron oxides by reaction with sodium borohydride / Redução de óxidos de ferro por reação com borohidreto de sódio
xviii The chemical reduction of transition metal ions in solution by action of the borohydride group ion has been applied by several researchers attempting to synthesize amorphous Fe-B alloys. In this project iron-oxide particles suspended in water, rather than ions in solution, were used for that purpose. The reducing chemical was chosen to be sodium borohy
Publicado em: 2005
-
5. A INIBIÇÃO DA ENZIMA δ-AMINOLEVULINATO DESIDRATASE POR MONOSSACARÍDEOS NÃO É MEDIADA PELA OXIDAÇÃO DE GRUPOS -SH
Heme pathway enzyme δ-aminolevulinate dehydratase (δ-ALA-D) is a good marker for oxidative stress and metal intoxication. This sulfhydrylic enzyme is inhibited in several oxidative pathologies like lead, mercury and aluminum intoxication, selenium organic species exposition and diabetes. Oxidative stress is one of cause of diabetes complications. T
Publicado em: 2004
-
6. Synthesis of AminoaÃÃcares and Compostos GlicoheterocÃclicos / SÃntese de AminoaÃÃcares e Compostos GlicoheterocÃclicos
In the present work, the synthesis of new 2,3-unsaturaed glycosides, amino and branchedchain amino sugars is reported. Reaction of tri-O-acetyl-D-glucal (20) with five alcohols 72a-e using Ferrierâs method provided 2,3-unsaturatd glycosides 73a-e. Deacetylation of compounds 73a-e followed by allylic oxidation furnished enones 75a-e, which are important prec
Publicado em: 1997
-
7. Analysis of the envelope of Rauscher murine oncornavirus: in vitro labeling of glycopeptides.
The identity and localization of the oligosaccharides of Rauscher murine type C viral glycoproteins have been examined by techniques of in vitro labeling. Terminal sialic acid was labeled with tritium by borohydride reduction after selective periodate oxidation, and galactose was labeled by borohydride reduction after specific enzymatic oxidation of the nonr
-
8. N-Acetylation of Glucosamine-6-Phosphate in Leuconostoc mesenteroides
A partially purified enzyme (120-fold) from Leuconostoc mesenteroides catalyzed the reversible N-acetylation of d-glucosamine-6-phosphate. Coenzyme A was not required and inhibited the reaction rate. Neither d-glucosamine nor N-acetyl-d-glucosamine served as a substrate for the reversible reaction. The enzyme preparation retained 50% of its original activity
-
9. Immunochemistry of the Group-Specific Polysaccharide of Nocardia brasiliensis
Estrada-Parra, Sergio (Escuela Nacional de Ciencias Biológicas, México, D.F., México), Abel Zamora, and L. F. Bojalil. Immunochemistry of the group-specific polysaccharide of Nocardia brasiliensis. J. Bacteriol. 90:571–574. 1965.—The group-specific polysaccharide of Nocardia brasiliensis was further purified, yielding an amorphous white material with
-
10. Conversion of 6-substituted tetrahydropterins to 7-isomers via phenylalanine hydroxylase-generated intermediates.
A new variant form of hyperphenylalaninemia has recently been discovered in which the patients characteristically excrete 7-biopterin in their urines in addition to the natural 6-biopterin (Curtius, H. Ch., Kuster, T., Matasovic, A., Blau, N. & Dhondt, J.-L. (1988) Biochem. Biophys. Res. Commun. 153, 715-721). This isomer had not been found previously in hum
-
11. Reduction of Cob(III)alamin to Cob(II)alamin in Salmonella enterica Serovar Typhimurium LT2
Reduction of the cobalt ion of cobalamin from the Co(III) to the Co(I) oxidation state is essential for the synthesis of adenosylcobalamin, the coenzymic form of this cofactor. A cob(II)alamin reductase activity in Salmonella enterica serovar Typhimurium LT2 was isolated to homogeneity. N-terminal analysis of the homogeneous protein identified NAD(P)H:flavin
American Society for Microbiology.
-
12. Expression cloning of a human α1,4-N-acetylglucosaminyltransferase that forms GlcNAcα1→4Galβ→R, a glycan specifically expressed in the gastric gland mucous cell-type mucin
Among mucus-secreting cells, the gastric gland mucous cells, Brunner’s glands, accessory glands of pancreaticobiliary tract, and pancreatic ducts exhibiting gastric metaplasia are unique in that they express class III mucin identified by paradoxical Con A staining composed of periodate oxidation, sodium borohydride reduction, Con A, and horseradish peroxid
The National Academy of Sciences.