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Autores: A partir do fascículo 39/9 a revista Química Nova adotou a licença CC-BY. Mais informações a respeito dessa licença podem ser obtidas aqui.

vol. 37, No. 1, 2014, p. 1-194

 

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(1), 123-133

Redes metalorgânicas e suas aplicações em catálise

André Luis Dantas Ramos * , #, I; Stefania TanaseII; Gadi RothenbergII

Metal-organic frameworks are synthesized by the self-arrangement of construction blocks. Their final structure consists of metals or metal clusters, acting as nodes; they are linked together by a spacer, such as organic molecules with multiple branches, forming a three-dimensional network, which can have a very high surface area, making it possible to accommodate host molecules in its interior.

Publicado online: agosto 21, 2013
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Artigos Quim. Nova 2014, 37(1), 1-5

 

Influência de diferentes solventes utilizados na deposição de filme de poli(9-vinilcarbazol) em dispositivos OLEDs

Emerson Roberto Santos*, I; Shu Hui WangI; Fabio Conte CorreiaI; Ivan Rodrigues CostaII; Victor SonnenbergII; Elvo Calixto Burini JuniorIII; Roberto Koji OnmoriIV


Organic light-emitting diode (OLED) device architecture is explored in this study.

Publicado online: agosto 21, 2013
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Quim. Nova 2014, 37(1), 6-9

 

Avaliação da mineralização de arroz em sistema de refluxo para a determinação de Cu, Fe, Mn e Zn por FAAS

Aline Colvara de Almeida Pinheiro; Meibel Teixeira Lisboa; Anderson Schwingel Ribeiro; Adriane Medeiros Nunes*; Alzira Yamasaki


A reflux system, which allows continuous circulation of water, is used for rice sample preparation, and is followed by the determination of Cu, Fe, Mn, and Zn by flame atomic absorption spectrometry.

Publicado online: setembro 2, 2013
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Quim. Nova 2014, 37(1), 10-17

 

Análise do teor e da qualidade dos lipídeos presentes em sementes de oleaginosas por RMN de baixo campo

André F. ConstantinoI; Valdemar Lacerda Jr.*, I; Reginaldo B. dos SantosI; Sandro J. GrecoI; Renzo C. SilvaI; Álvaro C. NetoI; Lúcio L. BarbosaI; Eustáquio V. R. de CastroI; Jair C. C. FreitasII


Factors such as the content and quality of lipids present in oil matrices, evaluated using the low-field NMR technique coupled to chemometric methods, can collaborate in choosing the best source for biodiesel production in a given region

Publicado online: outubro 9, 2013
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Quim. Nova 2014, 37(1), 18-21

 

Síntese e caracterização de nanocompósitos de poliestireno/hidroxissal lamelar

Samara Boaventura de Moraes; Rodrigo Botan; Liliane Maria Ferrareso Lona*


A layered hydroxide salt is modified using an organic molecule; ion exchange occurs between the anions of the layered hydroxide salt and those of the organic molecule. Subsequently, it is added to the monomer, thereby forming the nanocomposite.

Publicado online: setembro 24, 2013
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Quim. Nova 2014, 37(1), 22-26

 

Método hidrometalúrgico para reciclagem de metais terras raras, cobalto, níquel, ferro e manganês de eletrodos negativos de baterias exauridas de Ni-MH de telefone celular

Vinicius Emmanuel de Oliveira dos Santos*, I; Vinicius Guilherme CelanteII; Maria de Fátima Fontes LelisI; Marcos Benedito José Geraldo de FreitasI


Hydrometallurgical process with the characterization of both the precursor material (anode) and the recovered materials (lanthanides).

Publicado online: outubro 9, 2013
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Quim. Nova 2014, 37(1), 27-32

 

Acúmulo de cargas elétricas em propelente sólido compósito com matriz de polibutadieno líquido hidroxilado

Silvio Manea*; Gabriela Knippelberg B. Manea; Koshun Iha; José A. F. F. Rocco


The figure represents the electrical charging of the composite solid propellant, it may generate an internal electrostatic discharge in the solid propellant when it reaches its electric potential breakdown.

Publicado online: setembro 24, 2013
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Quim. Nova 2014, 37(1), 33-38

 

Estudo da qualidade da gasolina tipo A e sua composição química empregando análise de componentes principais

Fábio Israel M. Carvalho*; Heronides A. Dantas Filho


The principal component analysis(PCA) was applied to discriminate the samples studied, which revealed the separation of four groups according to their chemical composition determined in samples collected from the eight fuel distributors in the State of Pará.

Publicado online: novembro 1, 2013
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Quim. Nova 2014, 37(1), 39-43

 

Efeito do solvente na extração de ácidos clorogênicos, cafeína e trigonelina em Coffea arabica

Ivanira Moreira; Guilherme Luiz Scheel; Pedro Henrique Hatumura; Ieda Spacino Scarminio*


Statistical schedules of mixtures associated with HPLC-UV-DAD spectra were used to evaluate the effect of solvents on the extraction of chlorogenic acids, caffeine, and trigonelline in four coffee varieties: Bourbon, IAPAR59, IPR101, and IPR108.

Publicado online: agosto 21, 2013
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Quim. Nova 2014, 37(1), 44-49

 

Floculação de Chlorella sp. produzida em concentrado de dessalinização e estudo de método de extração de lipídeos intracelulares

Luiz Rodrigo Ito Morioka; Ângelo Paggi Matos*; Gisele Olivo; Ernani Sebastião Sant'Anna


Details of C. vulgaris growth on concentrated desalination and Bold Basal Medium (BBM): A - Growth curves; B - Optimization of flocculation by response surface methodology; C - Cultivation of C. vulgaris and flocculated biomass; D - Dried biomass of C. vulgaris.

Publicado online: setembro 2, 2013
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Quim. Nova 2014, 37(1), 50-55

 

Preparação e caracterização do complexo de inclusão do óleo essencial de Croton zehntneri com β-ciclodextrina

Ulisses N. AguiarI; Sidney G. de LimaI, II, *; Márcio S. RochaI; Rivelilson Mendes de FreitasI; Talita M. OliveiraI; Raiane M. SilvaII; Lara C. B. MouraII; Lorena T. G. de AlmeidaII


Essential oil of Croton zehntneri (a plant native of northeastern Brazil), whose main component is estragole, was complexed with β-cyclodextrin and characterized by Vibrational Spectroscopy and Differential Scanning Calorimetry.

Publicado online: setembro 24, 2013
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Quim. Nova 2014, 37(1), 56-62

 

Otimização do pré-tratamento hidrotérmico da palha de cana-de-açúcar visando à produção de etanol celulósico

Fernando A. Santos*; José H. de Queiroz; Jorge L. Colodette; Mauro Manfredi; Maria Eliana L. R. Queiroz; Celso S. Caldas; Filippe E. F. Soares


The cellulosic ethanol production process involves three steps: (i) pre-treatment to disrupt the crystalline structure of cellulose; (ii) enzymatic hydrolysis to hydrolyze polysaccharides into fermentable sugars; and (iii) fermentation process to convert sugars into ethanol.

Publicado online: agosto 21, 2013
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Quim. Nova 2014, 37(1), 63-68

 

Synthesis, characterization and application of ion imprinted poly(vinylimidazole) for zinc ion extraction/preconcentration with FAAS determination

Queila O. dos SantosI; Marcos A. BezerraI; Giovana de Fátima LimaII; Kristiany M. DinizIII; Mariana G. SegatelliIII; Talitha O. GerminianoIII; Vivian da Silva SantosIV; César R. T. Tarley*, III, V


A mini-column containing the polymer impregnated with zinc, the scanning electron microscopy of the material, and the schematic of the interaction of zinc ions in the selective cavity of the material.

Publicado online: setembro 30, 2013
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Quim. Nova 2014, 37(1), 69-73

 

A influência da piperina na biodisponibilidade de fármacos: uma abordagem molecular

Ramon G. de OliveiraI; Edilson B. Alencar-FilhoII; Mário L. A. A. VasconcellosI, *


We present here a theoretical study by molecular docking which demonstrate the selective interaction between Piperine with CYP3A4.

Publicado online: setembro 24, 2013
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Quim. Nova 2014, 37(1), 74-80

 

DFT theoretical study of energetic nitrogen-rich C4N6H8-n(NO2)n derivatives

Xinghui Jin; Bingcheng Hu*; Huanqing Jia; Zuliang Liu; Chunxu Lu


Detonation properties of the guanidine-fused bicyclic skeleton derivatives C4N6H8-n(NO2)n (n=1-6) were calculated using density functional theory.

Publicado online: setembro 30, 2013
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Quim. Nova 2014, 37(1), 81-84

 

Interaction of naproxen with calcium carbonate: physicochemical characterization and in vitro drug release studies

Shweta ParohaI; Ravindra Dhar DubeyII; Subrata MallickI, *


Interaction of naproxen with calcium carbonate after freeze-drying the wet-state equilibrated mixture has been investigated.Study revealed the acid-base reaction,and drug release increased with the increase of calcium carbonate in the formulations.

Publicado online: setembro 30, 2013
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Quim. Nova 2014, 37(1), 85-88

 

Isolation and antitrichomonal activity of the chemical constituents of the leaves of Maytenus phyllanthoides Benth. (Celastraceae)

Juan Alberto Moo-PucI; Zhelmy Martín-QuintalI; Gumersindo Mirón-LópezI; Rosa Esther Moo-PucII; Leovigildo QuijanoIII; Gonzalo J. Mena-RejónI, *


From Maytenusphyllanthoidesleaves, cyclolignan(+)-lyoniresinol was isolated and tested against Trichomonas vaginalis, showing activity at IC50 17.57 µM.This is the first report on the occurrence of lyoniresinol in Maytenus genus, and on itsanti-trichomonal activity.

Quim. Nova 2014, 37(1), 89-94

 

Perfil de flavonoides e avaliação do potencial antioxidante e citotóxico de Bauhinia purpurea (Fabaceae) da região amazônica

Priscila Moraes dos SantosI; Patrícia Danielle Oliveira de AlmeidaII; Emerson Silva LimaII; Manoel Odorico de MoraesIII; Patrícia Marçal da CostaIII; Assuero Silva MeiraIII; Cláudia do Ó PessoaIII; Ligia Maria Marino ValenteIV; Valdir Florêncio da Veiga JuniorI, *


Extracts of leaves and twigs of Fabaceae Bauhinia purpurea were collected from central and northern Amazonia and partitioned, and the flavonoid fractions were analyzed by HPLC-DAD and MS; distinct chromatographic profiles were observed, especially those indicating the presence of rutin and isoquercitrin. The extracts and flavonoid fractions exhibited excellent antioxidant activity and were comparable with that of the standard; however, they did not exhibit cytotoxicity to MDA-MB435 (lung), HCT-8 (colon), and SF-295 (glioblastoma) tumor cell lines.

Publicado online: outubro 16, 2013
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Revisão Quim. Nova 2014, 37(1), 95-103

 

Terpenos em cupins do gênero Nasutitermes (Isoptera, Termitidae, Nasutitermitinae)

Márcia N. S. de la CruzI; Helvécio M. dos Santos JúniorI; Claudia M. Rezende*, I; Ruy J. V. AlvesII; Eliana M. CancelloIII; Maurício M. da RochaIII


The front gland of Nasutitermes termite soldiers is mainly formed by mono and diterpenes with trinervitane, kempane and rippertane skeletons, only found in termites. This article reviews the scientific literature from interesting aspects of behavior and chemical composition.

Publicado online: setembro 4, 2013
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Quim. Nova 2014, 37(1), 104-110

 

Tratamento de dados censurados em estudos ambientais

Cristiano ChristofaroI, *; Mônica M. D. LeãoII


Concentrations below the detection limit (DL) are frequently observed in environmental studies. This study discusses the main methods of treating censored data presented in specialist literature, comparing their limitations and advantages.

Publicado online: setembro 24, 2013
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Quim. Nova 2014, 37(1), 111-122

 

Resíduos de medicamentos veterinários em leite e ovos

Érica Pacheco-SilvaI; Jurandir Rodrigues de SouzaI; Eloisa Dutra Caldas*, II


The use of veterinary drugs in food-producing animals can leave residues in food. Human exposure to these residues through consumption of animal products can pose a health risk.

Publicado online: setembro 10, 2013
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Nota Técnica Quim. Nova 2014, 37(1), 134-137

 

Máscaras mecânicas de sombra por eletrocorrosão para dispositivos eletro-ópticos

Iraci da Anunciação Pereira; Viviane Carvalho Nogueira; Michele Odnicki da Silva; Marcos Henrique Mamoru Otsuka Hamanaka; Valdirene Sullas Teixeira Peressinotto; Elaine Fernanda Zen Ávila Von Zuben; Thebano Emílio de Almeida Santos*


Illustration of cathode evaporation using a shadow mask for patterning OLED devices:A) Stainless steel shadow mask, B) 4 OLED devices with 9mm2 active area: glass-ITO/PEDOT/PFO/Al, C) picture of OLED devices and D) picture of an OLED device emitting light.

Publicado online: setembro 2, 2013
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Quim. Nova 2014, 37(1), 138-149

 

Análise de fármacos em águas por SPE-UPLC-ESI-MS/MS

Vanessa de Jesus GaffneyI; Vitor Vale Cardoso*, II; Alexandre RodriguesII; Elisabete FerreiraII; Maria João BenolielII; Cristina M. M. AlmeidaI


A method was developed for the analysis of 31 pharmaceuticals in water by SPE-UPLC-MS/MS. Instrumental conditions were optimized to allow the quantification of trace levels of the analytes. The method was validated through the estimation of the linearity range, method detection and quantification limits, matrix effects, recovery studies, precision and accuracy.

Publicado online: setembro 2, 2013
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Quim. Nova 2014, 37(1), 150-152

 

Equipamento de baixo custo para extração em fase sólida em amostras aquosas de grande volume utilizando pressão positiva de N2

Ananda L. Sanson*; Bruno E. L. Baeta; Keila L. T. Rodrigues; Robson J. C. F. Afonso


A low cost apparatus for SPE was developed that uses nitrogen under positive pressure, ensures the maintenance of the sample flow, allows simultaneous extraction of different samples without cross-contamination and sample contact with plastic materials.

Publicado online: setembro 24, 2013
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Quim. Nova 2014, 37(1), 153-157

 

Otimização, validação e aplicação de método para determinação da concentração residual de difenoconazol em morangos após múltiplas aplicações

Fernanda Fernandes Heleno; Maria Eliana Lopes Ribeiro de Queiroz*; Antônio Augusto Neves; André Fernando de Oliveira


The SLE/LTP-GC/ECD method was optimized, validated and applied in monitoring of the dissipation/persistence of difenoconazole residues in strawberries that received multiple applications of a commercial product containing this active ingredient.

Publicado online: setembro 10, 2013
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Quim. Nova 2014, 37(1), 158-163

 

Optimization of solvent mixtures for extraction from bark of Schinus terebinthifolius by a statistical mixture-design technique and development of a UV-Vis spectrophotometric method for analysis of total polyphenols in the extract

Maria Cristina DiCiaulaI; Gisely C. LopesI; Ieda S. ScarminioII; João Carlos P. de MelloI, *


A statistical mixture-design technique was used to study the effects of different solvents and their mixtures on the yield, total polyphenol content, and antioxidant capacity of the crude extracts from the bark of Schinus terebinthifolius.

Publicado online: setembro 30, 2013
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Educação Quim. Nova 2014, 37(1), 164-167

 

Um reator fotoquímico barato e eficiente para experimentos de química

Ramon Kenned Sousa AlmeidaI; Cláudia MartelliI; Gilson Herbert Magalhães DiasI; Julio Cesar Araujo da SilvaII, *


An efficient and inexpensive device for undergraduate chemistry classes aiming teaching the photolytic synthesis concepts. This device presents simplicity, low costs, class-compatible reaction times and good yields.

Publicado online: setembro 2, 2013
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Quim. Nova 2014, 37(1), 168-170

 

Nanoporous materials: pillared clays and regular silicas as an example of synthesis and their porosity characterization by X-ray diffraction

João Pires


Pillared clays and regular mesoporous silicas are examples of nanoporous materials whose porosity can be quantified by X-ray diffraction

Publicado online: setembro 2, 2013
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Quim. Nova 2014, 37(1), 171-175

 

A teoria de Pearson para a disciplina de Química Orgânica: um exercício prático e teórico aplicado em sala de aula

Mário L. A. A. Vasconcellos*


We present here our didactic experience on teaching Pearson theory (HSAB) for graduated students in organic chemistry.

Publicado online: agosto 9, 2013
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Quim. Nova 2014, 37(1), 176-180

 

Cromatografia gasosa-espectrometria de massas e derivatização assistida por micro-ondas na identificação de isômeros de glicose: uma prática para o ensino avançado em análise e caracterização de compostos orgânicos

Célia Ferreira Frias; Sílvia Alexandre Gramacho; Marta Pineiro*


A case study for the application of assisted derivatization by microwave and gas chromatography-mass spectrometry for the identification of glucose isomers.

Publicado online: setembro 2, 2013
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Quim. Nova 2014, 37(1), 181-185

 

Síntese de cristais líquidos derivados do nitroazobenzeno: uma proposta de síntese multi-etapas aplicada às aulas de Química Orgânica Experimental

Rodrigo Cristiano*; Marília Gabriela B. Cabral; Rafael B. de Aquino; Cláudia M. Z. Cristiano


This article describes a multi-step synthesis for acquiring liquid crystals derived from nitroazobenzene, which is used in the Experimental Organic Chemistry II classes.

Publicado online: agosto 9, 2013
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Assuntos Gerais Quim. Nova 2014, 37(1), 186-193

 

Os químicos ocultos e sua extraordinária jornada ao mundo dos átomos

Lediany Forostecki; Ourides Santin Filho*


At the end of the 19th century, a group named Occult Chemists suggested that they could "see" atoms by clairvoyance. They devised the structure of an "ultimate physical atom" (the anu), that enters in the composition of all substances and predicted the existence of isotopes.

Publicado online: agosto 2, 2013
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Errata Quim. Nova 2014, 37(1), 194

 

Geral Quim. Nova 2014, 37(1), i-iv

 

On-line version ISSN 1678-7064 Printed version ISSN 0100-4042
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