Iodate
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. A Simple, Rapid, and Reliable Titrimetric Method for the Determination of Glycerol at Low Concentration
Glycerol can be determined in several products by various analytical techniques. Titrimetric ones have stood out for their low cost, being recommended as standards. However, reliable, simple, fast, and green methods with low quantification limits are still needed. Titration of glycerol is based on its oxidation by periodate (Malaprade reaction) producing for
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. NEW APPLICATIONS FOR AMOXICILLIN DETERMINATION IN PURE FORM AND PHARMACEUTICALS BASED ON IODATE-IODIDE MIXTURE: TITRIMETRY AND SPECTROSCOPY STUDIES
Three simple methods are described for the determination of amoxicillin (AMX) in bulk drug and dosage forms using iodate-iodide mixture reagent. These methods employed the well-known analytical reaction between iodate-iodide mixture in the presence of acid solution. The iodide oxidized by iodate to iodine in an amount equivalent to the -COOH group present in
Quím. Nova. Publicado em: 2020-01
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3. Morphological and Biochemical Answer of the Wheat Seeds at Treatment with 2,4-Dinitrophenol and Potassium Iodate
Oxidative stress can be regarded as an imbalance between the amount of reactive oxygen species (ROS) and the ability of a biological system to eliminate the toxic species and repair the resulting damages. Since the germinating seeds and the resulted seedlings are rich in enzymes, whereas the treatment with chemicals affects much the seed germination, produci
Braz. arch. biol. technol.. Publicado em: 06/05/2016
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4. Titrimetric and spectrophotometric assay of diethylcarbamazine citrate in formulations using iodate and iodide mixture as reagents
Propõem-se titulação e dois métodos espectrofotométricos para a determinação de citrato de dietilcarbamazina (DEC) a granel e em suas formulações, usando iodato de potássio e iodeto de potássio como reagente. Os métodos utilizam a reação analítica conhecida entre iodato e iodeto, na presença de ácido. Na titulometria (Método A), o fármaco
Braz. J. Pharm. Sci.. Publicado em: 2015-03
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5. Material carbono ceramico condutor SiO2/ZrO2/C-grafite : sintese, caracterização e aplicações / SiO2/ZrO2/C-graphite conducting carbon ceramic material : synthesi characterization and application
SiO2/ZrO2/C-graphite was prepared by the sol-gel method in two compositions: (A) SZC30 (SiO2 = 50 %, ZrO2 = 20 %, C = 30 %) e (B) SZC20 (SiO2 = 60 %, ZrO2 = 20 %, C = 20 %) in % m/m, characterized and used to prepare electrodes. The carbon ceramic material was thermally treated at 400, 600, 800 and 1000 °C in nitrogen atmosphere, and it was observed that it
Publicado em: 2008
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6. A simple method for the spectrophotometric determination of cephalosporins in pharmaceuticals using variamine blue
A simple spectrophotometric method for the determination of cefotaxime, ceftriaxone, cefadroxil and cephalexin with variamine blue is presented. The determination is based on the hydrolysis of β-lactam ring of cephalosporins with sodium hydroxide which subsequently reacts with iodate to liberate iodine in acidic medium. The liberated iodine oxidizes variami
Eclética Química. Publicado em: 2008
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7. Modified Electrodes with Tungsten Oxide: Preparation Methods and Analytic Applications / Eletrodos modificados por óxido de tungstênio: Métodos de preparação e aplicações analíticas
Thin films of non-stoichiometric tungsten oxides have been deposited onto glassy carbon surfaces by electrodeposition from acidic W (VI) solutions. At these modified surfaces, rotating disc electrode voltammetric experiments indicated that iodate is electrocatalytically reduced in a mass-transport controlled process. The influence of the film thickness on th
Publicado em: 2006
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8. Determinação espectrofotométrica de dipirona em produtos farmacêuticos por injeção em fluxo pela geração de íons triiodeto
A flow injection spectrophotometric procedure was developed for the determination of metamizol in pharmaceutical formulations. The system is based on the reaction between metamizol and triiodide generated in the system by mixing iodate and iodide-starch solutions. The absorbance of triiodide-starch complex giving a steady-state baseline value which was monit
Química Nova. Publicado em: 2002-07
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9. Criação e caracterização óptica em cristais de KI / Growth and optical characterizations of color centers in KI
No presente trabalho apresentamos um outro método para criação de centros de cor, em matrizes de KI puro, através da absorção de dois fótons. Este processo possui uma característica útil: a coloração é realizada a baixa temperatura, ao contrário de outros métodos, que necessitam aquecer o cristal até próximo a ponto de fusão, fazendo com que
Publicado em: 1999
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10. EXPERIMENTAL PIGMENTARY DEGENERATION OF THE RETINA BY SODIUM IODATE
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11. REDUCTION IN AQUEOUS HUMOUR FORMATION AS CAUSED BY IODATE, SPIROLACTONE, AND POLYPHLORETIN PHOSPHATE*
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12. Characterization of voltage-gated sodium channels in ovine gonadotrophs: relationship to hormone secretion.
1. The properties of whole-cell Na+ currents (INa) were studied in immunocytochemically identified ovine gonadotrophs using the patch clamp technique. 2. Voltage recording under current clamp revealed that gonadotrophs did not fire spontaneously, and fired only a single action potential in response to a depolarizing current clamp step. 3. Under voltage clamp