Buscar
Mostrando ítems 1831-1840 de 4100
A simplified reflectometric method for the rapid determination of dipyrone in pharmaceutical formulations
(2007-09-06)
This paper describes a simple, portable and environmentally friendly method for the rapid determination of dipyrone in pharmaceuticals by using diffuse reflectance spectroscopy. The proposed method is based on the reflectance ...
Gold nanoelectrode ensembles for direct trace electroanalysis of iodide
(Elsevier B.V., 2006-08-04)
A procedure for the standardization of ensembles of gold nanodisk electrodes (NEE) of 30 nm diameter is presented, which is based on the analytical comparison between experimental cyclic voltammograms (CV) obtained at the ...
Rapid determination of furosemide by combined spot test/diffuse reflectance spectroscopy to detect doping in sport
(2013-07-01)
This paper describes the development and application of a simple, cheap, and clean method for the quantification of furosemide in urine samples from athletes, to detect doping, using a combined spot test/diffuse reflectance ...
Estabilização da fase perovskita e propriedades estruturais de filmes finos relaxores do sistema PLZT
(Universidade Estadual Paulista (Unesp), 2016-04-01)
Filmes finos de Pb0,91La0,09(Zr0,65Ti0,35)O3 (PLZT) foram preparados sobre substratos Pt/TiO2/SiO2/Si(100), usando um método químico baseado no processo Pechini, com objetivo de estudar a supressão da fase pirocloro e a ...
Easy estimation of endoglucanase activity using a free software app for mobile devices
(2020-01-01)
This study describes the estimation of the enzymatic activity of endoglucanase based on the 3,5-dinitrosalicylic acid (DNS) method and carboxymethylcellulose (CMC) substrate using glucose as the analyte. As an alternative ...
Rapid determination of lead in progressive hair dye lotion by spot test/diffuse reflectance spectroscopy with a paper platform
(2015-10-01)
A simple, inexpensive, and clean methodology employing a combined spot test/diffuse reflectance spectroscopy procedure was developed and applied for the quality control analysis of lead in hair dyes, using a filter paper ...
Thermal characterization and lifetime prediction of the PHBV/nanocellulose biocomposites using different kinetic approaches
(2020-09-01)
In the present study, biocomposite films from cellulose nanocrystals (CNCs) were obtained by the solution casting method. CNCs were isolated from pineapple crown using chemical treatments followed by sulfuric acid hydrolysis ...
Decolorization and removal of toxicity of textile azo dyes using fungal biomass pelletized
(2018-05-21)
Abstract: Industrialization and other human impacts have placed increasing pressure on aquatic environments, with the generation of large quantities of toxic aqueous effluents containing different substances, such as ...
Sensitive flow-injection spectrophotometric analysis of bromopride
(Elsevier B.V., 2014-12-10)
A flow injection spectrophotometric procedure employing merging zones is proposed for direct bromopride determination in pharmaceutical formulations and biological fluids. The proposed method is based on the reaction between ...
Determination of pantoprazole in human plasma by LC-MS-MS using lansoprazole as internal standard
(Ecv-editio Cantor Verlag Medizin Naturwissenschaften, 2004-01-01)
An analytical method based on liquid chromatography with positive ion electrospray ionization (ESI) coupled to tandem mass spectrometry detection was developed for the determination of pantoprazole (CAS 102625-70-7) in ...