Simultaneous Determinations
Mostrando 1-12 de 55 artigos, teses e dissertações.
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1. Development of a generic method for the determination of proton-pump inhibitors by capillary zoneelectrophoresis
A generic capillary zone electrophoresis method was developed for the analysis of four proton pump inhibitors: omeprazole, pantoprazole, lansoprazole and rabeprazole. During preliminary analysis screening of phosphate buffers at different pH levels was performed, in order to determine the optimum pH domain suitable for the simultaneous determination of all s
Braz. J. Pharm. Sci.. Publicado em: 30/09/2019
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2. VALORIZATION OF SOLID WASTES FROM THE BREWERY AND BIODIESEL INDUSTRIES FOR THE BIOPRODUCTION OF NATURAL DYES
This study aims to assess a new approach for concomitant valorization of two industrial wastes - raw glycerin and spent brewer’s yeast - for the bioproduction of valuable carotenoids. Microbial pigments have numerous applications in the food and cosmetic industries. First, four cultures of yeasts were screened using pure glycerol and either (NH4)2SO4 or ur
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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3. Comprobación de la uniformidad de resultados de un equipo de ensayos simultáneos de termofluencia
ABSTRACT The phenomenon of creep occurs in materials that operate under high temperatures and mechanical stresses, causing changes in their structures; such changes are evidenced by a progressive loss of mechanical strength. The characterization of this phenomenon should be performed with appropriate test machines, which are usually dependent on expensive te
Matéria (Rio J.). Publicado em: 19/07/2018
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4. Fit-for-Purpose ICP-MS Procedure Supporting Brazilian Regulations on Inorganic Constituents in Fresh and Saline Waters
This work aimed the development of an analytical procedure using inductively coupled plasma mass spectrometry (ICP-MS) in four modes of operation for simple and fast determination of Al, Ag, As, B, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, Li, Mg, Mn, Na, Ni, Pb, Sb, Se, Tl, Hg, V, U, and Zn in fresh and sea water samples attending simultaneously four Brazilian regula
J. Braz. Chem. Soc.. Publicado em: 2018-07
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5. Activismo juvenil en partidos con gestiones de gobierno a nivel subnacional en Argentina (2007-2015)
Abstract The paper aims to analyze the determinations of the recent period of youth political participation in Argentina, which highlights the importance of the political parties. After a deep crisis of political representation –that led youth activism to the impugnation of politics in connection to the State and party representation–, political parties
Rev. Sociol. Polit.. Publicado em: 2017-12
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6. Continuous wavelet transform methods for the simultaneous determinations and dissolution profiles of valsartan and hydrochlorothiazide in tablets
ABSTRACT Continuous wavelet transform (CWT) was proposed for the simultaneous determination and dissolution profiles of valsartan (VAL) and hydrochlorothiazide (HCT) in tablets, without the use of a chemical separation procedure. The CWT approach was applied to the original UV spectra and their ratio spectra in the optimal wavelength ranges. After testing se
Braz. J. Pharm. Sci.. Publicado em: 20/04/2017
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7. Caracterizações e aplicações analíticas de eletrodos compósitos modificados com Azul da Prússia e determinações simultâneas em sistemas de análise por injeção em batelada empregando somente um eletrodo de trabalho
Esta tese apresenta algumas potencialidades dos sistemas de análise por injeção em fluxo (FIA) e análise por injeção em batelada (BIA) acopladas à detecção amperométrica para o desenvolvimento de métodos de rotina úteis em alguns setores industriais, como o alimentício, farmacêutico e de biocombustíveis. Nesta perspectiva, foi empregado um ele
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/06/2012
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8. Determinação simultânea de íons metálicos por meio de técnicas eletroanalíticas e quimiométricas / Simultaneous determinations of metallic ions using Eletroanalytical techniques and chemometric tools.
Neste trabalho realizou-se a determinação simultânea de três cátions metálicos, sendo eles Zn2+, Cd2+ e Pb2+, em faixas de concentrações muito distintas, indo de _g/L a mg/L, utilizando a voltametria de redissolução anódica com pulso diferencial sobre um eletrodo de fibra de carbono onde fora depositado um filme de Mercúrio. Inicialmente realizou
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/05/2011
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9. Multivariate Analysis of ICP OES Calibration Conditions for Sequential Extraction of Metals Ions.
Sequential extraction procedures are normally applied to evaluate sediments, soils and plants. The reagents are often selected with the intention that they should target well-defined minerals phases although specíficity cannot be guaranteed. Inductively coupled plasma aptical emission spectrometry (ICP OES) is an instrumental technique that can be used for
EURO ANALYSIS. Publicado em: 2011
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10. Desenvolvimento de uma cultura iniciadora para produção de kefir
The kefir is a fermented milk with sweet sour taste, self-carbonated, with low alcohol content, resulting from the metabolic activity of microorganisms present in kefir grains, a complex and specific mixture of bacteria and yeasts surrounded by a polysaccharide matrix. The traditional method of obtaining the kefir cultures by successive reinoculation grain i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/10/2010
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11. Sistemas de análises químicas em fluxo explorando mecanismos de re-alimentação, calibração multivariada e outras abordagens para melhoria em desempenho / Flow systems exploiting feed-back mechanisms, multivariate calibration and other strategies for improving the analytical performance
Studies focusing on performance of intelligent analytical flow systems, association with multivariate calibration or use of nanocrystals as sensitizers were carried out. Moreover, improvements related to modifications in flow pattern were evaluated with emphasis to in-line dialysis. To this end, a strategy for implementing simultaneous determinations of iron
Publicado em: 2010
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12. Estrategias en el desarrollo de métodos analíticos para la determinación simultánea de compuestos orgánicos por espectrofotometría derivada
In this work is proposed, a simple experiment for the simultaneous determination of losartan (L) and hydrochlorothiazide (H) in synthetic and real samples by derivative spectrophotometry technique. For the students it is relevant to know this technique for simultaneous determinations of drugs, allowing that the students recognize that this technique is simpl
Química Nova. Publicado em: 2009