JBCS



19:42, qua jul 26











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. 38, No. 3, 2015, p. 297-458

 

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 2015, 38(3), 370-377

Novel superabsorbent hydrogel composite based on poly(acrylamide-co-acrylate)/nontronite: characterization and swelling performance

Renan C. F. LeitãoI; Cícero P. de MouraII; Lindomar R. D. da SilvaIII; Nágila M. P. S. RicardoIII; Judith P. A. FeitosaIII; Edvani C. MunizIV; André R. FajardoIV,V,*; Francisco H. A. RodriguesI,IV

A novel superabsorbent hydrogel composite based on a poly(acrylamide-coacrylate) matrix filled with nontronite with highly attractive swelling properties and potential uses in agriculture was designed and characterized in this manuscript.

http://dx.doi.org/10.5935/0100-4042.20150008

Publicado online: fevereiro 11, 2015
PDF
Editorial Quim. Nova 2015, 38(3), 297

 

Integridade científica: compromisso da SBQ

Angelo C. Pinto


http://dx.doi.org/10.5935/0100-4042.20150044

Artigos Quim. Nova 2015, 38(3), 298-302

 

A new homogeneous electrocatalyst for electrochemical carbonylation of methanol to dimethyl carbonate

Xiaoyan Wang; Gan Jia; Yuting Yu, Yanfang Gao*; Wen Zhang; Hong Wang; Zhenzhu Cao; Jinrong Liu


Dimethyl carbonate (DMC) is viewed as an environmentally benign intermediate because of its negligible eco-toxicity and its versatile chemical applications. In this paper, a novel homogeneous electrocatalyst based on Cu(Phen)Cl2 was used for electrocatalytic oxidative carbonylation of methanol to DMC.

http://dx.doi.org/10.5935/0100-4042.20150003

Publicado online: janeiro 16, 2015
PDF
Quim. Nova 2015, 38(3), 303-308

 

Microwave activation of immobilized lipase for transesterification of vegetable oils

Monna Lisa B. QueirozI; Rachel Freire BoaventuraI; Micael Nunes MeloI; Heiddy M. AlvarezII; Cleide M. F. SoaresI; Álvaro S. LimaI; Montserrat F. HerediaI; Cláudio DarivaI; Alini T. FricksI,*


Complete transesterification of soybean oil catalyzed by Novozyme 435 under microwave.

http://dx.doi.org/10.5935/0100-4042.20150031

Publicado online: março 5, 2015
PDF
Quim. Nova 2015, 38(3), 309-315

 

Trihalometanos em água potável e riscos de câncer: simulação usando potencial de interação e transformações de Bäcklund

Benjamim H. de Lima SilvaI,*; Marcos A. Bezerra de MeloII


A simulation between trichloromethane and alanine was performed investigating amino acid changes that may arise in protein and possibly induce the formation of cancer.

http://dx.doi.org/10.5935/0100-4042.20150013

Publicado online: fevereiro 11, 2015
PDF
Quim. Nova 2015, 38(3), 316-320

 

Análises físico-químicas de biofilmes de sulfato de condroitoina modificado

Élcio J. BunhakI,*; Elisabete S. MendesI; Nehemias C. PereiraII; Edgardo A. G. PinedaIII; Ana A. W. HechenleitnerIII; Osvaldo A. CavalcantiIV


The physicochemical and surface analyses of free films are important tools for research and the development of new materials for coating of solid dosage forms to control drug delivery.

http://dx.doi.org/10.5935/0100-4042.20150030

Publicado online: fevereiro 3, 2005
PDF Informação suplementar
Quim. Nova 2015, 38(3), 321-327

 

Desenvolvimento de materiais híbridos micro-mesoporosos do tipo ZSM-12/MCM-41

Joselaine C. SantanaI; Sanny W. M. MachadoI; Marcelo J. B. SouzaII; Anne M. Garrido PedrosaI,*


The figure shows that the parameters total area, crystallite size of the microporous phase and the mesoporous parameter value are dependent on the alkaline treatment carried out on different hybrid materials and indicate the different contributions of micro- and mesoporosity in these materials.

http://dx.doi.org/10.5935/0100-4042.20150012

Publicado online: fevereiro 11, 2015
PDF
Quim. Nova 2015, 38(3), 328-332

 

Composição química e temperatura de cristalização de ésteres obtidos de quatro óleos vegetais extraídos de sementes de plantas do cerrado

Luciane PierezanI; Márcia Regina Pereira CabralI; Deluana Martins NetoI; Jusinei Meireles StropaI,II; Lincoln Carlos Silva de OliveiraII; Dilamara Riva ScharfIII; Edésio Luiz SimionattoIII; Rogério César de Lara da SilvaI; Euclésio SimionattoI,*


Chemical composition and thermal behavior was reviewed in mixtures of four esters obtained from vegetable oils.

http://dx.doi.org/10.5935/0100-4042.20150018

Publicado online: fevereiro 3, 2003
PDF
Quim. Nova 2015, 38(3), 333-341

 

Triagem metabólica por PKS e NRPS em actinobactérias endofíticas de Citrus reticulata

Pedro L. R. da CruzI; Leila R. GiarolaII; Suellen da Silva MoraesI; Déborah Ellen S. G. da SilvaI; Joelma MarconIII; João L. AzevedoIII; Welington L. AraújoIV; Luciana G. de OliveiraIII,*


A molecular fingerprint approach was employed to evaluate the biosynthetic potential of endophytic actinobacteria from Citrus reticulata in the production of PKs and NRPs metabolites.

http://dx.doi.org/10.5935/0100-4042.20150010

Publicado online: fevereiro 11, 2015
PDF Informação suplementar
Quim. Nova 2015, 38(3), 342-350

 

Vis-NIR spectrometry, soil phosphate extraction methods and interactions of soil attributes

José Francirlei de OliveiraI; Michel BrossardII; Edemar Joaquim CorazzaIII; Robélio Leandro MarchãoIV; Pedro Rodolfo Siqueira VendrameV; Osmar Rodrigues BritoI; Maria de Fátima GuimarãesI,*


Understanding the interrelations between P content, extraction method and their effect on prediction by Vis-Nir spectroscopy.

http://dx.doi.org/10.5935/0100-4042.20150009

Publicado online: fevereiro 11, 2015
PDF Informação suplementar
Quim. Nova 2015, 38(3), 351-355

 

Uso da RMN de baixa resolução na avaliação da dinâmica molecular do Origanum vulgare

Vanessa Cristina dos Santos Peixoto de Oliveira*; Maria Inês Bruno Tavares; Eduardo Miguez Bastos da Silva; Bianca Natividade Barreto de Lima; Roberto Pinto Cucinelli Neto


The evaluation of thermal treatment of Origanum vulgare using the domain curves of proton spin-lattice relaxation time, which discloses the structural changes or degradation process occurring in the sample when it is submitted to thermal treatment.

http://dx.doi.org/10.5935/0100-4042.20150017

Publicado online: março 3, 2015
PDF
Quim. Nova 2015, 38(3), 356-363

 

Dispositivos DGT modificados com materiais alternativos para uso na especiação de elementos traço

Cristiano L. ChostakI,II; Mônica S. de CamposI; Simone B. da SilvaI; Gilberto AbateI; Marco T. GrassiI,*


Alternative DGT devices prepared using montmorillonite MT-K10 as the ligand phase and agarose as the diffusive phase, for the speciation of trace metals in natural waters.

http://dx.doi.org/10.5935/0100-4042.20150016

Publicado online: março 3, 2015
PDF
Quim. Nova 2015, 38(3), 364-369

 

Estudo da imobilização de lipase em sílica obtida pela técnica sol-gel

Aline Matuella Moreira Ficanha; Nádia Ligianara D. Nyari; Katarine Levandoski; Marcelo Luis Mignoni*; Rogério Marcos Dallago


Matrix sol-gel production created by partial hydrolysis of the precursor (TEOS) results in an oligomer. This is completely hydrolyzed and forms a colloidal dispersion (sol) which upon addition of the enzyme starts the process of polycondensation. The end of the process results in an immobilized enzyme.

http://dx.doi.org/10.5935/0100-4042.20150027

Publicado online: fevereiro 3, 2005
PDF
Quim. Nova 2015, 38(3), 378-386

 

Chemical composition variability in the Uncaria tomentosa (cat's claw) wild population

Evelyn Maribel Condori Peñaloza#; Samuel Kaiser#; Pedro Ernesto de Resende#; Vanessa Pittol#; Ânderson Ramos Carvalho#; George González Ortega#,*


No clear correlation between chemical composition and geographic origin, altitude or season of collection was found. Nevertheless, three chemotypes were distinguished based on the oxindole alkaloid profile of the cat's claw samples.

http://dx.doi.org/10.5935/0100-4042.20150007

Publicado online: fevereiro 11, 2015
PDF Informação suplementar
Quim. Nova 2015, 38(3), 387-392

 

Carboxylation of silver nanoparticles for the immobilization of β-galactosidase and its efficacy in galacto-oligosaccharides production

Shakeel Ahmed AnsariI,*; Rukhsana SatarII; Syed Kashif ZaidiI


Attachment of β-galactosidase on carboxylated AgNPs.

http://dx.doi.org/10.5935/0100-4042.20150006

Publicado online: fevereiro 11, 2015
PDF
Revisão Quim. Nova 2015, 38(3), 393-398

 

Aplicação de óxidos de ferro nanoestruturados como adsorventes e fotocatalisadores na remoção de poluentes de águas residuais

Marcela Fernandes SilvaI,*; Edgardo Alfonso Gómez PinedaII; Rosangela BergamascoI


The use of iron oxides as adsorbent and photocatalyst for the removal or degradation of pollutants has proved a promising approach. The separation and reuse of iron oxides is very simple, effective and economical while also being more environmentally friendly.

http://dx.doi.org/10.5935/0100-4042.20140311

Publicado online: dezembro 12, 2014
PDF
Quim. Nova 2015, 38(3), 399-409

 

Uso de sílicas modificadas para imobilização de lipases

Nayara B. Carvalho; Álvaro S. Lima; Cleide M. F. Soares*


Strategies for surface modification of supports using different additives for lipase immobilization in order to replace conventional immobilization methods and improve biocatalyst efficiency.

http://dx.doi.org/10.5935/0100-4042.20140304

Publicado online: novembro 13, 2014
PDF
Quim. Nova 2015, 38(3), 410-418

 

Metodologias de coleta, preservação e armazenamento de amostras de água para análise de mercúrio - uma revisão

Daniele KasperI,*; Bruce R. ForsbergI; Ronaldo de AlmeidaII; Wanderley R. BastosIII; Olaf MalmIV


Analysis of mercury in water is a challenge because of its low levels. Sample preservation methods and protocols that avoid contamination are discussed for the most commonly evaluated mercury species.

http://dx.doi.org/10.5935/0100-4042.20150020

Publicado online: março 3, 2015
PDF
Nota Técnica Quim. Nova 2015, 38(3), 419-426

 

Validação intralaboratorial da determinação de metiltestosterona em águas naturais por voltametria usando eletrodo de gota pendente de mercúrio

Luciane Miranda*; Maria L. Felsner; Yohandra R. Torres; Ivonete Hoss; Andressa Galli; Sueli P. Quináia


This study presents the in-house validation of a new voltammetric methodology for 17α-MT analysis in natural water. The methodology exhibited selectivity, linearity, accuracy and precision.

http://dx.doi.org/10.5935/0100-4042.20150014

Publicado online: fevereiro 11, 2015
PDF
Quim. Nova 2015, 38(3), 427-430

 

HS-SPME-GC-MS analysis of volatile and semi-volatile compounds from dried leaves of Mikania glomerata Sprengel

Esmeraldo A. Cappelaro; Janete H. Yariwake*


This paper describes the identification of volatile and semi-volatile compounds and a comparison of the HS-SPME-GC-MS chromatographic profiles of dried leaves of Mikania glomerata Sprengel (Asteraceae), also known in Brazil as "guaco".

http://dx.doi.org/10.5935/0100-4042.20150004

Publicado online: janeiro 16, 2015
PDF
Quim. Nova 2015, 38(3), 431-435

 

Considerações técnicas quanto ao uso da voltametria de varredura escalonada em processos adsortivos

Khallil Hassan Ahmad Ali FernandesI; João Paulo Tenório da Silva SantosII; Vinicius Del ColleII; Janaina Souza-GarciaI; Camilo Andrea AngelucciI,*


Cyclic voltammogram profile of platinum in acid media obtained by Staircase Sweep Voltammetry (SCV). The data displays the current recorded at different periods during each step comprising the SCV signal.

http://dx.doi.org/10.5935/0100-4042.20140317

Publicado online: dezembro 19, 2014
PDF
Educação Quim. Nova 2015, 38(3), 436-445

 

Química verdadeiramente verde - propriedades químicas do cloro e sua ilustração por experimentos em escala miniaturizada

Martin Wallau*; Daniela Bianchini; Camila Porto Ebersol; José Augusto dos Santos Júnior; Thiago Marques Barboza


Chlorine, the only element which appears greenish, is presented as one of the fundamental but also most criticised industrially used chemicals. By miniaturised experiments, chlorine´s applications and properties can be easily demonstrated.

http://dx.doi.org/10.5935/0100-4042.20140314

Publicado online: dezembro 12, 2014
PDF Informação suplementar
Quim. Nova 2015, 38(3), 446-450

 

Una propuesta para enseñar el efecto de la forma de las moléculas en la reactividad química

José G. Cermeños-EstradaI; John J. Pérez-MoncadaI; Daniel BarragánI,II,*


Steric effects or steric hindrance can be explained to freshman students clearly by using correlations between properties of molecules and the energy barrier height of series of SN2 reactions.

http://dx.doi.org/10.5935/0100-4042.20150015

Publicado online: fevereiro 11, 2015
PDF
Quim. Nova 2015, 38(3), 451-458

 

O uso de um sensor de luz linear como recurso didático para demonstrar princípios de difração e espectroscopia

Fernando Arruda Mendes de OliveiraI,II; Eduardo Ribeiro de AzevedoI,*; Luiz Antonio de Oliveira NunesI


Picture of the light intensity acquisition apparatus developed including: the electronic control circuit, linear diode array and software graphics interface with a Hg lamp spectrum displayed.

http://dx.doi.org/10.5935/0100-4042.20150022

Publicado online: março 3, 2015
PDF Informação suplementar

On-line version ISSN 1678-7064 Printed version ISSN 0100-4042
Química Nova
Publicações da Sociedade Brasileira de Química
Caixa Postal: 26037 05513-970 São Paulo - SP
Tel/Fax: +55.11.3032.2299/+55.11.3814.3602
Free access

GN1