Search Results - "Vagner Roberto de Souza"

pKa determinations of xanthene derivates in aqueous solutions by multivariate analysis applied to UV-Vis spectrophotometric data by Batistela, Vagner Roberto, Pellosi, Diogo Silva, de Souza, Franciane Dutra, da Costa, Willian Ferreira, de Oliveira Santin, Silvana Maria, de Souza, Vagner Roberto, Caetano, Wilker, de Oliveira, Hueder Paulo Moisés, Scarminio, Ieda Spacino, Hioka, Noboru

“…Xanthenes form to an important class of dyes which are widely used. Most of them present three acid-base groups: two phenolic sites and one carboxylic site…”
Get full text

Influence of the oxidation state of the metal center on the interaction of ruthenium complex with HSA by Franciscato, Douglas Santana, de Souza, Vagner Roberto

“…The binding of [Ru(H 2 O) 2 (bpydip)] 2+/3+ (bpydip =  N , N ′-bis[1-(2-pyridinyl)ethylidene]-1,3-propanediamine) to human serum albumin was investigated by…”
Get full text

INTERACTION OF RUTHENIUM COMPLEX WITH BOVINE SERUM ALBUMIN FOR AMPEROMETRIC DETECTION OF ASCORBIC ACID by Silva, Ronnie Edson da, Toledo, Kalil Cristhian Figueiredo, Jorge, Herculys Bernardo, Moreira Neto, Bento, Souza, Vagner Roberto de, Nakatani, Helena Shizuko

Get full text

Um aparato para monitorar reações rápidas: um "stopped-flow" artesanal de baixo custo by Batistela, Vagner Roberto, Tessaro, André Luiz, Soares, Rafael R. da S., Souza, Vagner Roberto de, Hioka, Noboru

“…The modern stopped-flow reaction analyzer has shown high efficiency and flexibility, which provides outstanding sample economy with a dead-time of less than 1…”
Get full text

O pKa de indicadores ácido-base e os efeitos coloidais by Previdello, Bruno Alarcon Fernandes, Carvalho, Fernando Rodrigues de, Tessaro, André Luiz, Souza, Vagner Roberto de, Hioka, Noboru

Get full text

Reverse micellar extraction of dyes based on fatty acids and recoverable organic solvents by Bukman, Lais, De Souza, Vagner Roberto, Fernandes, Nádia Regina Camargo, Caetano, Wilker, Batistela, Vagner Roberto, Hioka, Noboru

“…[Display omitted] •Stearic acid, palmitic acid and lauric acid acted as surfactants in basic media.•Reverse micelles of fatty acid salts were effective (>99%)…”
Get full text

Spectrophotometric studies of charge-transfer complexes formed with ions N,N’-alkyldiyl-bis(pyridinium) derivatives and iodide by Rodrigues de Carvalho, Fernando, da Silva, Fernando, de Lima, Ricardo, Correia Bellotto, Andrezza, de Souza, Vagner Roberto, Caetano, Wilker, Politi, Mario José, Hioka, Noboru, Coutinho, Kaline

“…[Display omitted] •Novel charge transfer complex is formed between pyridinium derivate and iodide.•The charge-transfer absorption band was studied by…”
Get full text

Stability of benzoporphyrin photosensitizers in water/ethanol mixtures: pKa determination and self-aggregation processes by Tessaro, André Luiz, Batistela, Vagner Roberto, Gracetto, Augusto César, Moisés de Oliveira, Hueder Paulo, Sernaglia, Rosana Lazara, de Souza, Vagner Roberto, Caetano, Wilker, Hioka, Noboru

“…Benzoporphyrin monoacid derivatives, here named B3A and B3B, are promising new drugs for photodynamic therapy. Although both isomers show interesting…”
Get full text

Complete investigation on the synthesis of [Ru(bpydip)Cl2]: the nonformation of cis isomer by da Silva, Alan Patrick, de Freitas Gauze, Gisele, Matias, Tiago Araújo, de Souza, Vagner Roberto, de Castro Rozada, Thiago, Basso, Ernani Abicht

“…Complexation between the Schiff base N4-tetradentate N,N′-bis(7-methyl-2-pyridylmethylene)-1,3-diiminopropane (bpydip) and ion Ru(II) occurs only in trans…”
Get full text

Erratum to: Triangular ruthenium acetate clusters containing the bis(pyridyl)propane ligand and their inclusion chemistry with β-cyclodextrin by Nikolaou, Sofia, Toma, Sérgio Hiroshi, de Souza, Vagner Roberto, Bonacin, Juliano Alves, Araki, Koiti, Toma, Henrique Eisi

Get full text

Erratum to: Triangular ruthenium acetate clusters containing the bis(pyridyl)propane ligand and their inclusion chemistry with [beta]-cyclodextrin by Nikolaou, Sofia, Toma, Sérgio Hiroshi, de Souza, Vagner Roberto, Bonacin, Juliano Alves, Araki, Koiti, Toma, Henrique Eisi

Get full text

Triangular ruthenium acetate clusters containing the bis(pyridyl)propane ligand and their inclusion chemistry with [beta]-cyclodextrin by Nikolaou, Sofia, Toma, Sérgio Hiroshi, de Souza, Vagner Roberto, Alves, Juliano B, Araki, Koiti, Toma, Henrique Eisi

“…The triruthenium carboxylate cluster [Ru^sub 3^O(OAc)^sub 6^(py)^sub 2^(bpp)]^sup +^ (OAc = acetate) containing the bridging 1,3-bis(4-pyridyl)propane (bpp)…”
Get full text

Triangular ruthenium acetate clusters containing the bis(pyridyl)propane ligand and their inclusion chemistry with β-cyclodextrin by Nikolaou, Sofia, Toma, Sérgio Hiroshi, de Souza, Vagner Roberto, Alves, Juliano B., Araki, Koiti, Toma, Henrique Eisi

“…The triruthenium carboxylate cluster [Ru 3 O(OAc) 6 (py) 2 (bpp)] + (OAc = acetate) containing the bridging 1,3- bis (4-pyridyl)propane (bpp) ligand, and its…”
Get full text

p K a determinations of xanthene derivates in aqueous solutions by multivariate analysis applied to UV–Vis spectrophotometric data by Batistela, Vagner Roberto, Pellosi, Diogo Silva, de Souza, Franciane Dutra, da Costa, Willian Ferreira, de Oliveira Santin, Silvana Maria, de Souza, Vagner Roberto, Caetano, Wilker, de Oliveira, Hueder Paulo Moisés, Scarminio, Ieda Spacino, Hioka, Noboru

“…[Display omitted] ► Inefficiency of the traditional methodologies in analyzing complex protolytic system. ► Close p K a values allied to spectral overlap…”
Get full text

Stability of benzoporphyrin photosensitizers in water/ethanol mixtures: p K a determination and self‐aggregation processes by Tessaro, André Luiz, Batistela, Vagner Roberto, Gracetto, Augusto César, Moisés de Oliveira, Hueder Paulo, Sernaglia, Rosana Lazara, de Souza, Vagner Roberto, Caetano, Wilker, Hioka, Noboru

“…Benzoporphyrin monoacid derivatives, here named B3A and B3B, are promising new drugs for photodynamic therapy. Although both isomers show interesting…”
Get full text

Interação de complexo de rutênio com albumina de soro bovino para detecção amperométrica de ácido ascórbico by Ronnie Edson da Silva, Kalil Cristhian Figueiredo Toledo, Herculys Bernardo Jorge, Bento Moreira Neto, Vagner Roberto de Souza, Helena Shizuko Nakatani

“…The binding of [Ru(PAN)(PPh3)2(ISN)]Cl (PAN = 1-(2'-Pyridylazo)-2-naphtholate) to bovine serum albumin (BSA) was investigated by spectroscopic techniques…”
Get full text

A interpretação do fenômeno da oxidação do magnésio : um olhar a partir da epistemologia de Bachelard by Cortez dos Reis, Jheniffer Micheline, Michellan Kiouranis, Neide Maria, Pimentel da Silveira, Marcelo, De Souza, Vagner Roberto

“…Este estudo é parte de uma investigação realizada em nível de mestrado sobre obstáculos epistemológicos em Bachelard, que possibilitou a identificação de…”
Get full text

Um aparato para monitorar reações rápidas: um "stopped-flow" artesanal de baixo custo by Vagner Roberto Batistela, André Luiz Tessaro, Rafael R. da S. Soares, Vagner Roberto de Souza, Noboru Hioka

“…The modern stopped-flow reaction analyzer has shown high efficiency and flexibility, which provides outstanding sample economy with a dead-time of less than 1…”
Get full text