Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Maria Encarnación Vazquez Suárez-Iha"'
Publikováno v:
Journal of Colloid and Interface Science. 323:1-5
The adsorption of DPKSH onto Amberlite XAD-2 (styrene resin) and XAD-7 (acrylic ester resin) has been investigated, at (25+/-1) degrees C and pH 4.7. The experimental equilibrium data were fitted to the Langmuir, Freundlich, and Dubinin-Radushkevich
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74675b12f64bb896856837fdcad8389e
https://doi.org/10.1016/j.jcis.2008.04.001
https://doi.org/10.1016/j.jcis.2008.04.001
Autor:
L. E. M. Vieira, M Guekezian, Lúcia Helena S. Ávila-Terra, F. P. Vieira, Ivanise Gaubeur, Maria Encarnación Vazquez Suárez-Iha
Publikováno v:
Analytical Letters. 41:779-788
A simple, fast, accurate, and sensitive spectrophotometric method was developed to determine zinc(II). This method is based on the reaction of Zn(II) with di‐2‐pyridyl ketone benzoylhydrazone (DPKBH), at pH=5.5 and 50% (v/v) ethanol. Beeŕs law w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fa520e0b399f12cea103da74674b685
https://doi.org/10.1080/00032710801934841
https://doi.org/10.1080/00032710801934841
Autor:
Enézio D. Moreira, Koshun Iha, José Atílio Fritz Fidel Rocco, Jony Andrade, Glaci Ferreira Martins Pinheiro, Maria Encarnación Vazquez Suárez-Iha
Publikováno v:
Química Nova. 31:569-573
The purpose of this work was to determine the safe shelf life of single-base propellants. The kinetic parameters relative to the consumption of the stabilizer diphenylamine (DPA) added to the propellant were determined as a function of the storage an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d542300cea3c394bd8d7a18784a26427
https://doi.org/10.1590/s0100-40422008000300020
https://doi.org/10.1590/s0100-40422008000300020
Autor:
Glaci Ferreira Martins Pinheiro, Maria Encarnación Vazquez Suárez-Iha, Koshun Iha, José Atílio Fritz Fidel Rocco, E.M. Bezerra, Jony Andrade
Publikováno v:
Química Nova v.30 n.4 2007
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova, Volume: 30, Issue: 4, Pages: 952-956, Published: AUG 2007
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova, Volume: 30, Issue: 4, Pages: 952-956, Published: AUG 2007
This paper shows different aspects related to the application of different thermal analysis techniques in the study of energetic materials. The criteria used to choose the best technique and an exact approach to adjust the experimental data with a pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4ef175552636702cb42a1001dc5659f
https://doi.org/10.1590/s0100-40422007000400034
https://doi.org/10.1590/s0100-40422007000400034
Autor:
Koshun Iha, Enézio D. Moreira, Maria Encarnación Vazquez Suárez-Iha, G. P. Franco, José Atílio Fritz Fidel Rocco, Jony Andrade
Publikováno v:
Eclética Química. 32:7-12
Este trabalho tem como propósito avaliar a cinética de consumo do estabilizante 2NDPA presente em uma amostra de propelente tipo base-dupla (BD). Tópicos relativos ao método analítico empregado e, a interferências na cinética de consumo do est
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8ca927e14a661ecfda34216b9b74772
https://doi.org/10.1590/s0100-46702007000400001
https://doi.org/10.1590/s0100-46702007000400001
Autor:
Jony Andrade, Koshun Iha, N. Suzuki, G. P. Franco, José Atílio Fritz Fidel Rocco, Maria Encarnación Vazquez Suárez-Iha
Publikováno v:
Eclética Química. 32:45-50
O propósito deste trabalho foi determinar os parâmetros cinéticos de decomposição térmica para uma amostra de propelente base simples e base dupla. Os dados obtidos pela calorimetria exploratória diferencial foram ajustados para o modelo ciné
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e45ea47158e45b41ea5a7b1cc3b362f6
https://doi.org/10.1590/s0100-46702007000300007
https://doi.org/10.1590/s0100-46702007000300007
Autor:
Lúcia Helena S. Ávila Terra, Ivanise Gaubeur, Jivaldo do Rosário Matos, Maria Carolina Blassioli Moraes, Maria Encarnación Vazquez Suárez-Iha, Claudimir Lucio do Lago, M Guekezian
Publikováno v:
Polyhedron. 23:2095-2101
This paper shows the characteristics of a coordinated compound formed by zinc(II) and di-2-pyridyl ketone salicyloylhydrazone (DPKSH). The synthesized complex shows the formula: Zn(DPKSH)2. Elemental analysis, electron ionization and electrospray mas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48a65c86463c310ebb6b2207c89a3026
https://doi.org/10.1016/j.poly.2004.06.004
https://doi.org/10.1016/j.poly.2004.06.004
Autor:
Maria Encarnación Vazquez Suárez-Iha, José Atílio Fritz Fidel Rocco, Jivaldo do Rosário Matos, Koshun Iha, José Eduardo Salgueiro Lima, Massao Ionashiro, Antonio Gonçalves Frutuoso
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 75:551-557
The thermal decomposition of ammonium perchlorate (AP)/hydroxyl-terminated-polybutadiene (HTPB), the AP/HTPB solid propellant, was studied at different heating rates in dynamic nitrogen atmosphere. The exothermic reaction kinetics was studied by diff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9e9fee74f22750cfe6d3deba1e8c8a0
https://doi.org/10.1023/b:jtan.0000027145.14854.f0
https://doi.org/10.1023/b:jtan.0000027145.14854.f0
Autor:
Rodrigo O Ribeiro, M S Rocha, Koshun Iha, Leonardo T. Ueno, Maria Encarnación Vazquez Suárez-Iha, Francisco B. C. Machado
Publikováno v:
Journal of Molecular Structure: THEOCHEM. :207-215
The tautomeric equilibrium of benzotriazole was investigated using Hartree– Fock (HF), MP2, B3LYP and coupled cluster methodologies with a series of basis set. The HF and MP2 results present a clear preference for the 1H and 2H tautomers, respectiv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24ac2c49cb4d3b691f1aee281a3e2954
https://doi.org/10.1016/j.theochem.2003.09.004
https://doi.org/10.1016/j.theochem.2003.09.004
Autor:
Jivaldo do Rosário Matos, Lúcia Helena S. Ávila Terra, Maria Encarnación Vazquez Suárez-Iha, M Guekezian, Ivanise Gaubeur
Publikováno v:
Polyhedron. 21:2375-2380
In this paper the interaction between nickel(II) and di-2-pyridyl ketone benzoylhydrazone (DPKBH) was studied. The synthesized complex shows the formula: Ni(DPKBH) 2 . IR spectra show that interaction of the ligand with nickel(II) occurs through the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5296bd5fe6c1f7a2b5701d8eb7a7f255
https://doi.org/10.1016/s0277-5387(02)01185-3
https://doi.org/10.1016/s0277-5387(02)01185-3