Výsledky vyhledávání - "E. T. G. Cavalheiro"

Akademický článek

Fast determination of minoxidil by photometric flow titration

Autor: R. A. de Sousa, F. S. Semaan, J. A. F. Baio, E. T. G. Cavalheiro

Publikováno v: Eclética Química, Vol 30, Iss 3, Pp 79-84 (2018)

A photometric flow titration based on the redox reaction between KMnO 4 and minoxidil is described. The best titration results were observed at 3.20 x 10 -4 mol L -1 KMnO 4 and 1.00 x 10 -3 mol L -1 minoxidil, using the minoxidil solutions as titrant

Externí odkaz: https://doaj.org/article/eb6bc2e0fec94c219be3de07ff814596

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Tert-butylhydroquinone: structural elucidation of a new polymorphic form

Autor: J. H. F. de Jesus, R. S. Medeiros, J. A. Ellena, E. T. G. Cavalheiro

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca2f7b35001eb069495b9d92ba0ef2fc
https://doi.org/10.1007/s10973-022-11627-7

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Chitosan and naproxen salts: preparation and characterization

Autor: R. S. Medeiros, A. P. G. Ferreira, E. T. G. Cavalheiro

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45f4e0edcdda86c033215fa0336d2c04
https://doi.org/10.1007/s10973-022-11626-8

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Direct and simultaneous spectrophotometric determination of Ni (II) and Co (II) using diethanoldithiocarbamate as complexing agent Determinação espectrofotométrica simultânea direta de Ni(II) e Co(II) usando dietanolditiocarbamato como agente complexante

Autor: P. A. Antunes, G. Bannach, G. O. Chierice, E. T. G. Cavalheiro

Publikováno v: Eclética Química, Vol 34, Iss 2, Pp 7-13 (2009)

A direct spectrophotometric method for simultaneous determination of Co(II) and Ni(II), with diethanoldithiocarbamate (DEDC) as complexing agent, is proposed using the maximum absorption at 360 and 638 nm (Co(II)/DEDC) and 390 nm (Ni/DEDC). Adjusting

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doajarticles::cb4799ec94658153bfb73b2a2391ee15
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702009000200001

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Thermal behaviour of TEGMMA copolymers obtained by photopolymerization using iron complexes Comportamento térmico de copolímeros TEGMMA obtidos por fotopolimerização usando complexos de ferro

Autor: I. C. Rigoli, C. C. Schmitt, L. A. Ramos, M. G. Neumann, E. T. G. Cavalheiro

Publikováno v: Eclética Química, Vol 32, Iss 3, Pp 39-43 (2007)

Copolymers of methyl methacrylate (MMA) and triethyleneglycol dimethacrylate (TEGDMA) obtained by photoinitiated polymerization using Fe(III) complexes were submitted to thermogravimetry (TGA) under dynamic air atmosphere and N2, and differential sca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doajarticles::ab48b18447fc778fb10a32042dda2b85
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702007000300006

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Thermal behavior of alginic acid and its sodium salt Comportamento térmico do ácido algínico e do seu sal de sódio

Autor: J. P. Soares, J. E. Santos, G. O. Chierice, E. T. G. Cavalheiro

Publikováno v: Eclética Química, Vol 29, Iss 2, Pp 57-64 (2004)

An evaluation of hydration and thermal decomposition of HAlg and its sodium salt is described using thermogravimetry (TG) and differential scanning calorimetry (DSC). TG curves in N2 and air, were obtained for alginic acid showed two decomposition st

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doajarticles::b3ca39adbbceb955673ed2aceab4f4e9
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702004000200009

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