JBCS



14:06, sex jul 1






Edição Atual vol. 39, No. 5, 2016, p. 535-645

 

New submission procedures for OPEN ACCESS from March 4th, 2016

The Board of Directors of the Sociedade Brasileira de Química-SBQ (publisher of the Química Nova-QN) decided that from March 2016 the JBCS will adopt the full open access format in which authors are required to cover part of the publication costs for their articles. See more...



Artigo de Capa
Quim. Nova 2016, 39(5), 542-547

Diferenciando reproduções e pinturas verdadeiras: um interessante estudo de caso

Dalva L. A. de Faria*; Thiago S. Puglieri

A painting signed "Maurice, Utrillo, V" and dated 1923 was thrown away because it was assumed to be a worthless reproduction. Careful analysis however, which included spectroscopic techniques, showed that it was a painting reproduction made using the Jacomet procedure.

http://dx.doi.org/10.5935/0100-4042.20160056

Publicado online: abril 12, 2016
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Artigos Quim. Nova 2016, 39(5), 535-541

 

Materiais de composição Ti/PbxTi1-xO2 para degradação eletroquímica foto-assistida de poluentes orgânicos

Ana Luiza de T. FornazariI; Sidney Aquino NetoII; Adalgisa R. de AndradeII; Douglas W. MiwaIII; Artur de J. MotheoIII; Geoffroy R. P. MalpassI,*


Effect of UV irradiation on the cyclic voltamogram of a Ti/TiO2 electrode produced by the thermal decomposition method.

http://dx.doi.org/10.5935/0100-4042.20160071

Publicado online: abril 25, 2016
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Quim. Nova 2016, 39(5), 548-553

 

Comparative study of the physicochemical properties and photocatalytic activity of modified MCM-41 synthesized by direct (one-step) incorporation and impregnation

Verónica R. Elías; Ema V. Sabre; Sandra G. Casuscelli; Griselda A. Eimer*


The next transition: Cr6+-O2−↔ Cr5+-O1− took place on the catalyst surface under visible light (λ > 380 nm) resulting in the formation of hole/electron pairs in the titania. These pairs produce highly reactive radical species that initiate dye degradation.

http://dx.doi.org/10.5935/0100-4042.20160057

Publicado online: abril 12, 2016
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Quim. Nova 2016, 39(5), 554-560

 

Sais de tetrafenilfosfônio e tris(1,10-fenantrolina)ferro(II) de complexos aniônicos de dibutilestanho(IV) com ditiocarbimatos: síntese, caracterização e atividade antifúngica

Fernanda C. BottegaI; Marcelo R. L. OliveiraI,*; Mayura M. M. RubingerI; Carlos R. BellatoI; José D. ArdissonII; Laercio ZambolimIII


Salts of anionic dithiocarbimatedibutyltin(IV) complexes with tris(1,10-phenanthroline)iron or tetraphenylphosphonium cations active against phytopathogenic fungi.

http://dx.doi.org/10.5935/0100-4042.20160064

Publicado online: abril 15, 2016
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Quim. Nova 2016, 39(5), 561-566

 

Desenvolvimento de um sistema de análise por injeção em fluxo para pré concentração de Cd sobre resina de XAD-4 modificada com fenilfluorona e determinação por espectrometria de absorção atômica

João Paulo Reis da Silva; Graziela Fregonez Baptista Cruz; Ricardo J. Cassella; Wagner F. Pacheco*


A colunm was made by XAD-4 modfyed with phenylfluorone and used to pre concetrate Cd.

http://dx.doi.org/10.5935/0100-4042.20160075

Publicado online: abril 29, 2016
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Quim. Nova 2016, 39(5), 567-574

 

Estudo computacional de 1H-imidazol-2-il-pirimidina-4,6-diaminas para a identificação de potenciais precursores de novos agentes antimaláricos

Marina Gabriela Birck; Luana Janaína Campos; Eduardo Borges de Melo*


Using a data set with antimalarial compounds, it was developed QSAR, pharmacophoric modeling, and virtual screening (VS) studies. The obtained QSAR model equation was used for predict the potential antimalarial activty of four selected hits.

http://dx.doi.org/10.5935/0100-4042.20160065

Publicado online: abril 15, 2016
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Quim. Nova 2016, 39(5), 575-580

 

The wilkinson complex as a heterogeneous catalyst in the partial hydrogenation of 1-heptyne. Regeneration of the complex

Edgardo CagnolaI,*; Domingo LiprandiI; José ParedesI; Nicolás CarraraI,II; Mónica QuirogaI,II


Hydrogenation of 1-heptyne, Wilkinson complex as catalyst in homogeneous system and in heterogeneous systems, supported on γ-Al2O3 and a commercial carbonaceous material, RX3.

http://dx.doi.org/10.5935/0100-4042.20160066

Publicado online: abril 15, 2016
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Quim. Nova 2016, 39(5), 581-587

 

Phytochemical analysis of hydroethanolic extracts from powdered roots of Panax ginseng C. A. Meyer and Heteropterys tomentosa A. Juss and evaluation of their effects on astrocyte cell death

Andréia Gomes BezerraI,*; Giuseppina NegriI,IV; Joaquim Maurício Duarte-AlmeidaII,IV; Soraya Soubhi SmailiIII; Elisaldo Araújo CarliniIV


This study describes a chemical analysis of hydroethanolic extracts of powdered roots from P. ginseng and H. tomentosa using HPLC-DAD-ESI-MS/MS and the effect of these extracts on the viability of astrocytes in vitro test.

http://dx.doi.org/10.5935/0100-4042.20160069

Publicado online: abril 20, 2016
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Quim. Nova 2016, 39(5), 588-591

 

Propiedades volumétricas de la DL-alanina en soluciones acuosas de tetrafluoroborato de 1-butil, 3-metilimidazolio a diferentes temperaturas

Manuel S. PáezI,*; Francisco J. PáezI; Francisco J. TorresII


This image depicts the behavior of alanine density as a function of temperature and molality in aqueous solution 0.1000 m [bmim +] [BF4-].

http://dx.doi.org/10.5935/0100-4042.20160059

Publicado online: abril 12, 2016
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Quim. Nova 2016, 39(5), 592-597

 

Procedimento automático para determinação espectrofotométrica de hidroquinona empregando multicomutação em sistema de análise em fluxo

Manoel de Jesus de Aquino LimaI,II; Quésia Guedes da Silva CastilhoI; Ridvan Nunes FernandesI; Auro Atsushi TanakaI; Boaventura Freire dos ReisII,*


Diagram of the flow system module based on the multicommutation flow analysis process for photometric determination of hydroquinone in pharmaceutical formulations.

http://dx.doi.org/10.5935/0100-4042.20160070

Publicado online: abril 20, 2016
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Revisão Quim. Nova 2016, 39(5), 598-607

 

Fármacos quirais em diferentes matrizes ambientais: ocorrência, remoção e toxicidade

Ana R. RibeiroI,#; Carlos AfonsoII,III; Paula M. L. CastroIV; Maria E. TiritanI,II,III,*


Biodegradation can be enantioselective and enantiomeric fraction quantification is important for improving environmental risk assessment of chiral pharmaceuticals.

http://dx.doi.org/10.5935/0100-4042.20160060

Publicado online: abril 12, 2016
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Quim. Nova 2016, 39(5), 608-620

 

A determinação dos produtos avançados de glicação (AGEs) e de lipoxidação (ALEs) em alimentos e em sistemas biológicos: avanços, desafios e perspectivas

Júnia H. Porto Barbosa*; Isis T. Souza; Antônio E. G. Santana; Marília O. F. Goulart


Advanced glycation (AGEs) and lipoxidation (ALEs) end products formation from carbohydrates or dicarbonyl compounds in proteins and their subsequent analysis, after enzymatic or acidic hydrolysis.

http://dx.doi.org/10.5935/0100-4042.20160048

Publicado online: março 18, 2016
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Nota Técnica Quim. Nova 2016, 39(5), 621-626

 

Determination of Cu, Fe, Mn, Zn and free fatty acids in pequi oil

Aparecida M. S. Mimura*; Lara P. Faza; Rafael Marques; Mireille Le Hyaric; Marcone A. L. de Oliveira; Julio C. J. Silva


Free fatty acid determination was performed by capillary zone electrophoresis after ethanolic extraction of pequi oil samples. A new approach to acid digestion of pequi oil samples was developed for the determination of Cu, Fe, Zn and Mn by flame atomic absorption spectrometry.

http://dx.doi.org/10.5935/0100-4042.20160067

Publicado online: abril 15, 2016
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Educação Quim. Nova 2016, 39(5), 627-633

 

Metodologia experimental para reações gás-líquido

Lilian C. Mello*; Edmilson R. de Castro; Luiz A. Jermolovicius


Reaction mechanism proposed, and long-time of contact between the phases.

http://dx.doi.org/10.5935/0100-4042.20160036

Publicado online: fevereiro 22, 2016
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Quim. Nova 2016, 39(5), 634-640

 

A atuação de professores de ensino superior: investigando dois professores bem avaliados pelos estudantes

Ana Luiza de QuadrosI,*; Eduardo Fleury MortimerII


Professor of universities can work with research, administration and extension. However, his biggest challenge is in the classroom and in the human formation.

http://dx.doi.org/10.5935/0100-4042.20160037

Publicado online: fevereiro 22, 2016
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Quim. Nova 2016, 39(5), 641-645

 

Construção da curva de equilíbrio líquido-vapor usando uma equação de estado cúbica: uso do excel no ensino de físico-química

Josefredo R. Pliego Jr.*


Use of Excel and iterative method to calculate the liquid-vapour equilibrium curve through the Redlich-Kwong equation and the Maxwell equal-area rule.

http://dx.doi.org/10.5935/0100-4042.20160038

Publicado online: fevereiro 22, 2016
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