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Autores: informamos que, a partir do próximo fascículo (39/9), a revista Química Nova adotará a licença CC-BY. Mais informações a respeito dessa licença podem ser obtidas aqui.

vol. 37, No. 10, 2014, p. 1579-1734

 

Submission procedures for OPEN ACCESS

The Board of Directors of the Sociedade Brasileira de Química-SBQ (publisher of the Química Nova-QN) decided that QN 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 2014, 37(10), 1721-1731

Química na Poesia e Poesia na Química

W. Martin Wallau*

The German novel "Elective Affinities" which transfers the chemical concept of "Elective Attractions", represented here by the affinity scheme between lime, nitric and sulphuric acid, to social relations, is presented as an example for the use of poetic means in science communication.

http://dx.doi.org/10.5935/0100-4042.20140271

Publicado online: outubro 6, 2014
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Artigos Quim. Nova 2014, 37(10), 1579-1583

 

A simple square-wave voltammetric method for the determination of scopolamine in pharmaceuticals using a boron-doped diamond electrode

Simone Birkheur Santos; Camila Farinha Valezi; Jessica Scremin; Carlos Alberto Rossi Salamanca-Neto; Luiz Henrique Dall'Antonia; Elen Romão Sartori*


A new voltammetric method was developed for the determination of scopolamine in pharmaceutical formulations using a cathodically pretreated boron-doped diamond electrode.

http://dx.doi.org/10.5935/0100-4042.20140278

Publicado online: outubro 8, 2014
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Quim. Nova 2014, 37(10), 1584-1588

 

Application of Fourier transform infrared spectroscopy, chemical and chemometrics analyses to the characterization of agro-industrial waste

Nathalie Merlin; Barbara Arruda Nogueira; Vanderlei Aparecido de Lima; Larissa Macedo dos Santos*


The FTIR spectrum of poultry litter and cattle manure samples showed the characterization of the OM of the residues, indicating the functional groups present and their intensity.

http://dx.doi.org/10.5935/0100-4042.20140259

Publicado online: setembro 22, 2014
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Quim. Nova 2014, 37(10), 1589-1593

 

Determination of Mn2+ ion by solution scanometry as a new, simple and inexpensive method

Ardeshir ShokrollahiI,II,*; Nasrin ShokrollahiI,III


Steps of solution scanometry method for determination of Mn2+ ion, using periodate as oxidizing reagent.

http://dx.doi.org/10.5935/0100-4042.20140277

Publicado online: outubro 8, 2014
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Quim. Nova 2014, 37(10), 1594-1599

 

Remoção do ácido mefenâmico em água utilizando carvão ativado em pó, lama vermelha e oxidação com cloro

Rodrigo B. MoruzziI,*; Verônica B. LimaI; Renata ColomboII; Fabiano T. ConceiçãoI; Marcos R. V. LanzaIII


The removal of mefenamic acid in aqueous solution was investigated using activated carbon powder (ACP), red mud and oxidation with chlorine.

http://dx.doi.org/10.5935/0100-4042.20140269

Publicado online: outubro 6, 2014
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Quim. Nova 2014, 37(10), 1600-1605

 

Influence of initial CaO/SiO2 ratio on the hydration of rice husk ash-Ca(OH)2 and sugar cane bagasse ash-Ca(OH)2 pastes

Lourdes Maria Silva de SouzaI,II; Eduardo de Moraes Rego FairbairnII; Romildo Dias Toledo FilhoII; Guilherme Chagas CordeiroIII,*


Pastes containing calcium hydroxide and either rice husk ash or sugar cane bagasse ash, in various initial CaO/SiO2 molar ratios, produce different types of calcium silicate hydrates (CaO-SiO2-H2O), and inclusions of calcium aluminate hydrates.

http://dx.doi.org/10.5935/0100-4042.20140258

Publicado online: setembro 22, 2014
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Quim. Nova 2014, 37(10), 1606-1609

 

In vitro effect of isoschaftoside isolated from syngonium podophyllum on pig kidney Na+, K+-ATPase

Anne Caroline Candido GomesI,*; Luzia da Silva SampaioII; Paulo André da SilvaII; Marcelo Einicker LamasII; Cassia Mônica SakuraguiIII; Cleber Bomfim Barreto JuniorIV; Naomi Kato SimasV; Ricardo Machado KusterI


Isoschaftoside from Syngonium podophyllum significantly decreased the pig renal Na+, K+-ATPase activity at different concentrations.

http://dx.doi.org/10.5935/0100-4042.20140257

Publicado online: setembro 22, 2014
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Quim. Nova 2014, 37(10), 1610-1617

 

Preparation and evaluation of magnetic chitosan particles modified with ethylenediamine and Fe(III) for the removal of Cr(VI) from aqueous solutions

Thiago V. ToledoI; Carlos R. BellatoI,*; Carlos H. Ferreira de SouzaI; Junielly T. DominguesI; Danilo de C. SilvaI; César ReisI; Maurício P. Ferreira FontesII


This study shows the steps of preparing a new magnetic adsorbent of chitosan modified with ethylenediamine and Fe (III) (MPCh-EDA-FeCL). When evaluated on the removal of Cr (VI) aqueous solutions MPCh-EDA-FeCL indicated interesting adsorption properties. This adsorbent was successfully applied in electroplating effluent.

http://dx.doi.org/10.5935/0100-4042.20140245

Publicado online: setembro 5, 2014
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Quim. Nova 2014, 37(10), 1618-1623

 

Determinação da atividade antitríptica em proteínas de produtos do amendoim isoladas por cromatografia de afinidade

Jéssica Morais de AraújoI; Jussara Cristina AlvesI; Thayane Kerbele Oliveira das Neves PeixotoI; Amanda Fernandes de MedeirosI; Richele Janaína de Araújo MachadoII; Alexandre Coelho SerquizII; Renata Alexandra Moreira das NevesI; Elizeu Antunes dos SantosII; Adriana Ferreira UchôaIII; Ana Heloneida de Araújo MoraisI,*


Affinity chromatography on trypsin - Sepharose CNBr 4B proved an efficient technique for isolating protein inhibitors with antitryptic specific activity in Japanese peanut, peanut nougat, and peanut butter.

http://dx.doi.org/10.5935/0100-4042.20140254

Publicado online: setembro 22, 2014
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Quim. Nova 2014, 37(10), 1624-1628

 

Coprecipitation of trace amounts of silicon with aluminum hydroxide and the determination by flame atomic absorption spectrometry

Ardeshir Shokrollahi*; Masoud Gohari


Aluminum hydroxide is an excellent collector in the determination of silicon by coprecipitation method.

http://dx.doi.org/10.5935/0100-4042.20140253

Publicado online: setembro 22, 2014
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Quim. Nova 2014, 37(10), 1629-1632

 

Determination of anti-cancer drug emodin using a silica-gel-modified carbon paste electrode

Dai Long VuI; Bensu ErtekII; Yusuf DilginII; Libor CervenkaIII,*


Possible mechanism of electrochemical determination of emodin using silica gel modified carbon paste electrode by anodic stripping differential pulse voltammetry.

http://dx.doi.org/10.5935/0100-4042.20140244

Publicado online: setembro 5, 2014
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Quim. Nova 2014, 37(10), 1633-1638

 

Interação de complexo de rutênio com albumina de soro bovino para detecção amperométrica de ácido ascórbico

Ronnie Edson da Silva; Kalil Cristhian Figueiredo Toledo; Herculys Bernardo Jorge; Bento Moreira Neto; Vagner Roberto de Souza; Helena Shizuko Nakatani*


Ruthenium complex quenched bovine serum albumin (BSA) fluorescence. The formation of the Ru-BSA complex was spontaneous through a dynamic quenching process. The binding constants, binding sites, and thermodynamic parameters were calculated.

http://dx.doi.org/10.5935/0100-4042.20140230

Publicado online: agosto 27, 2014
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Quim. Nova 2014, 37(10), 1639-1645

 

Efeito da variação de parâmetros reacionais na preparação de grafeno via oxidação e redução do grafite

Hiany Mehl; Carolina F. Matos; Eduardo G. C. Neiva; Sergio H. Domingues; Aldo J. G. Zarbin*


Varying the experimental parameters in graphite oxidation and reduction of graphene oxide produced graphene with different properties.

http://dx.doi.org/10.5935/0100-4042.20140252

Publicado online: setembro 22, 2014
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Quim. Nova 2014, 37(10), 1646-1649

 

Final chlorine dioxide stage at near-neutral pH for bleaching eucalyptus pulp

Robisnéa A. RibeiroI,*; Fernando J. B. GomesI; José N. FlorianiII; Renato A. P. DamásioI; Iara F. DemunerI; Jorge L. ColodetteI


The slow release of chlorous acid from chlorite results in efficient bleaching with the minimal concentration of chlorate.

http://dx.doi.org/10.5935/0100-4042.20140251

Publicado online: setembro 22, 2014
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Quim. Nova 2014, 37(10), 1650-1656

 

Physico-chemical properties of meso-tetrakis(p-methoxyphenyl)porphyrin (TMPP) incorporated into PluronicTM P-123 and F-127 polymeric micelles

Bruno H. VilsinskiI,*; Jader L. AparicioI; Paulo Cesar de Souza PereiraI; Silvia Luciana FávaroI; Katieli S. Souza CampanholiI; Adriana P. GerolaII; André L. TessaroIII; Noboru HiokaI; Wilker CaetanoI


The spectroscopic properties of the photosensitizer compound meso-tetrakis(p-methoxyphenyl)porphyrin (TMPP), solubilized in biocompatible polymeric micelles of PluronicTM surfactants P-123 and F-127, were analyzed for application in photodynamic therapy (PDT).

http://dx.doi.org/10.5935/0100-4042.20140273

Publicado online: outubro 8, 2014
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Quim. Nova 2014, 37(10), 1657-1662

 

Estudo de catalisadores de níquel suportados em cinza de casca de arroz na reforma de metano com dióxido de carbono visando a produção de hidrogênio e gás de síntese

Karine ZanoteliI; Jair C. C. FreitasII; Paulo Roberto Nagipe da SilvaI,#,*


Methane reforming with carbon dioxide, or dry reforming, is a promising alternative that may lead to the reduction of CO2 emissions and the production of a syngas with a lower ratio of H2/CO. In this work, nickel catalysts supported on rice husk ash were used.

http://dx.doi.org/10.5935/0100-4042.20140272

Publicado online: outubro 8, 2014
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Revisão Quim. Nova 2014, 37(10), 1663-1669

 

Noctuidae-induced plant volatiles: current situation and prospects

Vanusa Rodrigues HorasI; Mario Antonio Navarro da SilvaI; Vinicius AnniesII; Beatriz Helena L. N. Sales MaiaII; Francisco A. MarquesII,*; Maria Fátima das Graças Fernandes da SilvaIII


The aim of this contribution is to give an overview of the plant volatiles induced by noctuids, as well as to present and discuss the methodologies used in the induction of these volatiles, and the prospects involving this line of research in pest control.

http://dx.doi.org/10.5935/0100-4042.20140247

Publicado online: setembro 5, 2014
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Quim. Nova 2014, 37(10), 1670-1679

 

Cromatografia gasosa quiral na resolução de enantiômeros envolvidos em flavours de frutas

Alexandre PorteI,*; Luciana H. Maia PorteII; Luciana M. de OliveiraI


Fruit flavours comprise several enantiomers and enantioselective gas chromatography can be a powerful tool to study these. Learn more in this review.

http://dx.doi.org/10.5935/0100-4042.20140262

Publicado online: setembro 22, 2014
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Quim. Nova 2014, 37(10), 1680-1691

 

O Estado da arte da cromatografia líquida bidimensional: conceitos fundamentais, instrumentação e aplicações

Noroska G. S. MogollónI,*; Paula F. de LimaI; Mariana R. GamaI; Mayra F. FurlanI; Soraia C. G. N. BragaI; Paloma S. PrataI; Isabel C. S. F. JardimII; Fabio AugustoI


This review focuses on theoretical, instrumental, and chemometric aspects of comprehensive two-dimensional liquid chromatography and its use as a powerful separation tool in complex sample analyses.

http://dx.doi.org/10.5935/0100-4042.20140261

Publicado online: setembro 22, 2014
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Nota Técnica Quim. Nova 2014, 37(10), 1692-1698

 

Separação e determinação quantitativa dos alcanos lineares e dos cíclicos/ramificados em petróleos brasileiros por aduto de ureia e cromatografia gasosa: um estudo de caso revisitado

Elaine Marotta*; Francisco Radler de Aquino Neto; Débora de Almeida Azevedo


A complete analysis of oil fractions allows correlations to be defined between their composition and derivatives, generating products with high economic value. Urea adduction was used to accurately separate linear and branched/cyclic alkanes in Brazilian oils.

http://dx.doi.org/10.5935/0100-4042.20140265

Publicado online: setembro 22, 2014
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Quim. Nova 2014, 37(10), 1699-1706

 

Optimization of chromatographic conditions and comparison of extraction efficiencies of four different methods for determination and quantification of pesticide content in bovine milk by UFLC-MS/MS

Fabiano A. S. OliveiraI,III; Fernando D. MadureiraI; Renata P. LopesI,II; Marina G. FerreiraIII; Benito Soto-BlancoIII; Marília M. MeloIII,*


This paper describes the optimizing chromatographic steps for multiresidue determination of 20 pesticides in bovine milk using four different extraction methods and a technique of UFLC-MS/MS.

http://dx.doi.org/10.5935/0100-4042.20140264

Publicado online: setembro 22, 2014
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Educação Quim. Nova 2014, 37(10), 1707-1712

 

Selective detection of fluoride based on a pyridinium N-phenolate-calix[4]pyrrole displacement assay: an undergraduate laboratory experiment

Karina Mannrich; Marcelo Silva; Leandro G. Nandi; Celso R. Nicoleti; Vanderlei G. Machado*


Students synthesized calix[4]pyrrole (CP), a receptor that is highly selective for F, and a pyridinium N-phenolate dye. Subsequently, the students used the synthesized compounds to investigate a displacement assay on the basis of the competition between F and the dye for CP.

http://dx.doi.org/10.5935/0100-4042.20140249

Publicado online: setembro 5, 2014
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Quim. Nova 2014, 37(10), 1713-1715

 

Catalyzed and non-catalyzed synthesis of bioactive Monastrol

Haline G. O. Alvim; Jose R. Correa; Taynara R. Machado; Wender A. Silva; Brenno A. D. Neto*


The bioactive 3,4-dihydropyrimidin-2(1H)-thione known as Monastrol is synthesized. The manuscript compares the reaction under catalyzed and non-catalyzed conditions, highlighting the importance of catalysis and multicomponent reactions

http://dx.doi.org/10.5935/0100-4042.20140266

Publicado online: setembro 22, 2014
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Quim. Nova 2014, 37(10), 1716-1720

 

An undergraduate level experiment on the synthesis of Au nanoparticles and their size-dependent optical and catalytic properties

Anderson G. M. da Silva; Thenner S. Rodrigues; Alexandra Macedo; Rafael T. P. da Silva; Pedro H. C. Camargo*


The synthesis of Au NPs with controlled sizes is described as a laboratory experiment covering concepts on the synthesis, stabilization, and characterization of Au NPs, size-dependent optical/catalytic properties at the nanoscale, chemical kinetics, and the role of a catalyst.

http://dx.doi.org/10.5935/0100-4042.20140235

Publicado online: agosto 27, 2014
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