Now showing items 1-10 of 260
Use of sorghum seed tissue as a biocatalyst in a stirred reactor for oxalic acid determination
(Analytical Communications, 1996-11-01) [Artigo]
The enzyme oxalate oxidase, E.C. 188.8.131.52 from Sorghum vulgare seeds (variety BR303) was used to develop a new sensor for oxalate determination without any purification. The sorghum seeds were conditioned in a 0.10 mol I-1 ...
Evaluation of the effects of different extraction methods for main volatile compounds from Bambusa textilis leaves
(Journal of Bamboo and Rattan, 2005-11-17) [Artigo]
Bambusa textilis is widely used in popular medicine to treat all kinds of wound inflammation, chronic fever, pulmonary and infectious diseases. The aim of this study was to compare the chemical composition of the extracts ...
Prolapse-free relativistic Gaussian basis sets for the superheavy elements up to Uuo (Z=118) and Lr (Z=103)
(Atomic Data and Nuclear Data Tables, 2007-11-01) [Artigo]
Prolapse-free basis sets suitable for four-component relativistic quantum chemical calculations are presented for the superheavy elements UP to (118)Uuo ((104)Rf, (105)Db, (106)Sg, (107)Bh, (108)Hs, (109)Mt, (110)Ds, ...
Diapocynin versus apocynin as pretranscriptional inhibitors of NADPH oxidase and cytokine production by peripheral blood mononuclear cells
(Biochemical and Biophysical Research Communications, 2010-03-12) [Artigo]
Apocynin has been extensively used as an inhibitor of NADPH oxidase (NOX) in many experimental models using phagocytic and non-phagocytic cells. Currently, there is some controversy about the efficacy of apocynin in ...
Electrochemical evaluation of intermetallic hydrogen storage alloys surface modified by sol-gel method.
(Abstracts of Papers of the American Chemical Society, 2001-04-01) [Resumo]
DFT study of alpha-alanine as a function of the medium polarity
(Journal of Molecular Structure: THEOCHEM, 2001-07-02) [Artigo]
The zwitterionic (Z) form, neutral (N) form and transition structure (TS) connecting N to Z, have been studied at the B3LYP/6-31++G** level of calculation by using the SCRF methodology. The intramolecular proton transfer ...
NH3+N2O3 reaction. High level calculations
(Journal of Molecular Structure: THEOCHEM, 2006-02-14) [Artigo]
We have undertaken a comprehensive study of the NH3 + N2O3 reaction in gas phase. Total energies of reactants, intermediates, transition states, and products have been calculated at CBS-QB3 level of theory. The corresponding ...
Synthesis, optical and ferroelectric properties of PZT thin films: experimental and theoretical investigation
(Journal of Materials Chemistry, 2012-01-01) [Artigo]
PbZr0.40Ti0.60O3 (PZT40/60) thin films with ferroelectric and dielectric properties have been grown on Pt/Ti/SiO2/Si and LaAlO3 (100) substrates using the chemical solution deposition method. These films have been characterized ...
2-Bromo-1,4-naphthoquinone: a potentially improved substitute of menadione in Apatone therapy
(Brazilian Journal of Medical and Biological Research, 2012-08-01) [Artigo]
Apatone™, a combination of menadione (2-methyl-1,4-naphthoquinone, VK3) and ascorbic acid (vitamin C, VC) is a new strategy for cancer treatment. Part of its effect on tumor cells is related to the cellular pro-oxidative ...
Carbon fiber microelectrodes for adsorptive stripping analysis of trace nucleic acids
(Journal of Electroanalytical Chemistry, 1998-01-15) [Artigo]
Carbon fiber ultramicroelectrodes are shown to be suitable for adsorptive stripping potentiometric measurements of trace DNA and RNA. The origin of the carbon fiber has a profound effect upon its suitability for trace ...