JBCS



19:45, 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. 37, No. 7, 2014, p. 1111-1261

 

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(7), 1209-1219

Bionanocompósitos preparados por incorporação de nanocristais de celulose em polímeros biodegradáveis por meio de evaporação de solvente, automontagem ou eletrofiação

Fabiano Vargas PereiraI,*; Everton Luiz de PaulaI; João Paulo de MesquitaII; Alessandra de Almeida LucasIII; Valdir ManoIV

An alternative to improve the properties of biodegradable polymers is the development of nanocomposites using biodegradable nanoparticles obtained from renewable resources.

http://dx.doi.org/10.5935/0100-4042.20140141

Publicado online: janeiro 1, 1900
PDF
Artigos Quim. Nova 2014, 37(7), 1111-1117

 

Produção e caracterização de polihidroxialcanoatos obtidos por fermentação da glicerina bruta residual do biodiesel

Tamiris V. B. FigueiredoI,*; Márcio I. CamposII; Luciane S. SousaI; Jaff R. da SilvaI; Janice I. DruzianI


The schematic representation is a possible chemical composition of PHAs produced by fermentation of GBRB in shake flasks (35 °C, 72 h, 180 rpm) by Cupriavidus necator IPT 026.

http://dx.doi.org/10.5935/0100-4042.20140183

Publicado online: julho 3, 2014
PDF
Quim. Nova 2014, 37(7), 1118-1121

 

Estudo da liberação controlada do herbicida ametrina em compósitos à base de PVA - carvão ativado

Ricardo Bortoletto-SantosI; Caue RibeiroII,*


Herbicide release was shown to be dependent on medium pH: in release tests using different pHs, medium acidification accelerated release and tablet deformation according to acid strength.

http://dx.doi.org/10.5935/0100-4042.20140182

Publicado online: julho 3, 2014
PDF
Quim. Nova 2014, 37(7), 1122-1127

 

HPLC-DAD based method for the quantification of flavonoids in the hydroethanolic extract of Tonina fluviatilis Aubl. (Eriocaulaceae) and their radical scavenging activity

Marcelo R. de AmorimI; Daniel RinaldoII; Fabiano P. do AmaralIII; Wagner VilegasIII; Mara A. G. MagentaIV; Gerardo M. Vieira JrV; Lourdes C. dos SantosI,*


This article describes the development of a HPLC-DAD based method for the isolation, identification, and quantification of three flavonoids in the hydroethanolic extract of the aerial parts of Tonina fluviatilis and evaluation of their radical scavenging activity by a DPPH based assay.

http://dx.doi.org/10.5935/0100-4042.20140193

Publicado online: julho 15, 2014
PDF Informação suplementar
Quim. Nova 2014, 37(7), 1128-1131

 

Spectrophotometric determination of Sudan Blue II in environmental samples after dispersive liquid-liquid microextraction

Yunus Emre UnsalI; Mustafa TuzenI; Mustafa SoylakII,*


A dispersive liquid-liquid microextraction procedure coupled to spectrophotometry is described for the determination of the trace levels of Sudan Blue II.

http://dx.doi.org/10.5935/0100-4042.20140192

Publicado online: julho 15, 2014
PDF
Quim. Nova 2014, 37(7), 1132-1137

 

Síntese, liofilização e caracterização de acetato de 57Fe(III)

Antônio O. de SouzaI,*; Valdecir BiondoI; Paulo Willian C. SarvezukI; Jusmar V. BelliniI; Pedro R. AnizelliII; Dimas A. M. ZaiaII; Andrea Paesano JrI


X-ray diffraction (refined with the program FullProf / routine Le Bail) for iron(III) 57 acetate, formula [57Fe3O (CH3COO)6 (H2O)3]CH3COO or Ac57Fe, showed that the space group that best refines the X-ray diffraction pattern of the compound is C2/c.

http://dx.doi.org/10.5935/0100-4042.20140181

Publicado online: julho 3, 2014
PDF
Quim. Nova 2014, 37(7), 1138-1144

 

Atividade antibacteriana in vitro e toxicidade frente à Artemia salina Leach. de alguns compostos triazenos

Gustavo Luiz ParaginskiI,*; Claiton Roberto BerticelliI; Priscilla Jussiani ZambiaziI; Vanessa Teixeira Kunz ParaginskiI; Manfredo HörnerI; Aline Joana Rolina Wohlmuth Alves dos SantosII; Rosmari HörnerIII,#


Six diaryltriazene compounds bearing different substituent groups were tested for antibacterial activity and toxicity toward Artemia salina. MIC results were good to very good, in the range 8 to 128 µg mL-1. Toxicity was about 10-fold lower than DTIC for three compounds.

http://dx.doi.org/10.5935/0100-4042.20140180

Publicado online: julho 3, 2014
PDF
Quim. Nova 2014, 37(7), 1145-1150

 

Development and validation of a RP-HPLC method to determine the xanthyletin content in biodegradable polymeric nanoparticles

Cristiane de Melo CazalI,*; Moacir Rossi ForimII; Maria Fátima G. Fernandes da SilvaII; Paulo Cezar VieiraII; João Batista FernandesII


A rapid analytical method using HPLC for the quantification of xanthyletin content in biodegradable polymeric nanoparticles has been developed and validated.

http://dx.doi.org/10.5935/0100-4042.20140204

Publicado online: julho 22, 2014
PDF
Quim. Nova 2014, 37(7), 1151-1157

 

Estudo químico e atividades antiproliferativa, tripanocida e leishmanicida de Maxillaria picta

Thiago L. de AlmeidaI; Josiane A. MonteiroI; Greice K. P. LopesI; Lucas U. R. ChiavelliI; Silvana M. de O. SantinI; Cleuza C. da SilvaI; Vanessa KaplumII; Débora B. ScariotII; Celso V. NakamuraII; Ana L. T. G. RuizIII; João E. CarvalhoIII; Ricardo T. de FariaIV; Armando M. PominiI,*


Chemical study of the orchid Maxillaria picta allowed the isolation of the bioactive stilbenes phoyunbene B and phoyunbene C, which were evaluated for anticancer activity against human tumor cell lines and against evolutionary forms of T. cruzi and L. amazonensis.

http://dx.doi.org/10.5935/0100-4042.20140179

Publicado online: julho 3, 2014
PDF Informação suplementar
Quim. Nova 2014, 37(7), 1158-1164

 

Vanadato de bismuto sintetizado por combustão em solução na presença de diferentes combustíveis: síntese, caracterização e estudo da atividade fotocatalítica

Jéssica Aparecida SerafimI; Renata AfonsoI; Adriana Campano LucilhaI; Lucas Agostinho de OliveiraI; Paulo Rogério Catarini da SilvaII; Marcelo Rodrigues da SilvaIII; Elen Romão SartoriI; Luiz Henrique Dall'AntoniaI;*


Bismuth vanadate, a semiconductor, when irradiated with visible light promotes discoloration of dyes leading to a decrease in their concentration as a function of irradiation time.

http://dx.doi.org/10.5935/0100-4042.20140191

Publicado online: julho 15, 2014
PDF Informação suplementar
Quim. Nova 2014, 37(7), 1165-1170

 

Theoretical investigations of the bulk modulus in the tetra-cubic transition of PbTiO3 material

Renan A. P. Ribeiro; Sergio R. de Lázaro*


Density functional theory B3LYP investigations of the pressure-induced phase transition of PbTiO3 material revealed that the transition state of this process displayed a tetragonal symmetry, and spontaneous polarizations changed under pressure.

http://dx.doi.org/10.5935/0100-4042.20140190

Publicado online: julho 15, 2014
PDF
Quim. Nova 2014, 37(7), 1171-1176

 

Avaliação de dispositivos de captura de imagens digitais para detecção colorimétrica em microzonas impressas

Fabrício Ribeiro de Souza; Gerson Francisco Duarte Junior; Paulo de Tarso Garcia; Wendell Karlos Tomazelli Coltro*


This report describes a study about the feasibility of using a conventional digital camera, a cell-phone camera, an optical microscope, and a scanner as digital image capture devices for colorimetric measurements in laser-printed microzones on transparency films.

http://dx.doi.org/10.5935/0100-4042.20140189

Publicado online: julho 15, 2014
PDF Informação suplementar
Quim. Nova 2014, 37(7), 1177-1181

 

Determinação do coeficiente de atividade na diluição infinita em sistemas etanol-água-sal por microextração em fase sólida-GC-FID

Andrew Milli Elias; Filipe Arantes Furtado; Gerson Luiz Vieira Coelho*


Schematic representation of a closed system containing a liquid phase, a gaseous phase, and fiber-coating phase. SPME is a technique for extraction and concentration of analytes for posterior analysis on analytical equipment such as GC or HPLC.

http://dx.doi.org/10.5935/0100-4042.20140178

Publicado online: julho 3, 2014
PDF
Quim. Nova 2014, 37(7), 1182-1187

 

Determination of triamterene in human plasma and urine after its cloud point extraction

Ahad Bavili TabriziI,II,*; Sana NainiIII; Kosar ParnianIII; Samin MohammadiIII; Fayeze Emami zadIII; Samira Pourtaghi AnvarianIII; Ali AbdollahiII


Cloud point extraction combined with spectrofluorimetric detection was used to extract and determine triamterene in human urine samples, and was found to be a promising method for monitoring drugs for pharmaceutical and clinical purposes.

http://dx.doi.org/10.5935/0100-4042.20140188

Publicado online: julho 15, 2014
PDF
Quim. Nova 2014, 37(7), 1188-1192

 

Variation of essential oil composition of Tapirira guianensis Aubl. (Anacardiaceae) from two sandbank forests, North of Brazil

Maria das Graças Bichara Zoghbi*; Raimunda Alves Pereira; Giselle do Socorro Luz de Lima; Maria de Nazaré do Carmo Bastos


Leaves and branches of Tapirira guianensis (Anacardiaceae) afforded three different types of oils: I) β-selinene/α-selinene, II) (E)-caryophyllene, and III) β-sesquiphellandrene/α-zingiberene. This is the first report on the volatiles of this tree.

http://dx.doi.org/10.5935/0100-4042.20140197

Publicado online: julho 22, 2014
PDF
Quim. Nova 2014, 37(7), 1193-1198

 

Physicochemical properties of lecithin-based nanoemulsions obtained by spontaneous emulsification or high-pressure homogenization

Roselena S. Schuh#; Fernanda Bruxel#; Helder F. Teixeira*,#


Nanoemulsions stabilized by rapeseed or sunflower lecithins demonstrated similar physicochemical properties to the egg lecithin-based formulations obtained by spontaneous emulsification or high-pressure homogenization procedures.

http://dx.doi.org/10.5935/0100-4042.20140186

Publicado online: julho 15, 2014
PDF
Revisão Quim. Nova 2014, 37(7), 1199-1208

 

Avaliação de risco ambiental de ambientes aquáticos afetados pelo uso de agrotóxicos

Rafaela Maciel RebeloI; Eloisa Dutra CaldasII,*


The environmental fate of pesticides depends on its physical-chemical properties, application method, soil characteristics and climate. The pesticide can reach the ground water and contaminate river and lakes, affecting the living organisms.

http://dx.doi.org/10.5935/0100-4042.20140165

Publicado online: junho 17, 2014
PDF
Quim. Nova 2014, 37(7), 1220-1226

 

Dissulfeto de molibdênio, um material multifuncional e surpreendente: doze anos depois

Fernando Wypych*


2H-MoS2 having a layered structure is able to be exfoliated through several chemical or physical methods and the obtained single layers can be used in several branches of science and technology.

http://dx.doi.org/10.5935/0100-4042.20140150

Publicado online: junho 5, 2014
PDF
Nota Técnica Quim. Nova 2014, 37(7), 1227-1232

 

Grape juice quality control by means of 1H NMR spectroscopy and chemometric analyses

Caroline Werner Pereira da Silva Grandizoli#; Francinete Ramos Campos#; Fabio Simonelli#; Andersson Barison*,#


Grape Juice Quality Control by Means of 1H NMR Spectroscopy and Chemometric Analyses.

http://dx.doi.org/10.5935/0100-4042.20140208

Publicado online: julho 22, 2014
PDF
Quim. Nova 2014, 37(7), 1233-1235

 

Medição e interpretação de valores do potencial redox (EH) em matrizes ambientais

Wilson F. Jardim*


http://dx.doi.org/10.5935/0100-4042.20140207

Publicado online: julho 22, 2014
PDF
Educação Quim. Nova 2014, 37(7), 1236-1243

 

"Serpentes de Faraó" - a história de uma brincadeira pirotécnica e sua aplicabilidade no ensino de princípios químicos básicos

Marcius A. UllmannI; Wilhelm M. WallauI; Daniela BianchiniI,*; Andressa da C. SchneidII; Lara M. P. MontenegroI


Would you like to make serpent eggs which vivify? These eggs are basically comprised of sugar and sodium bicarbonate. In the past, mercuric thiocyanate was used for this experiment and its decomposition had generated ash very more times longer than the eggs. Interesting, yet toxic.

http://dx.doi.org/10.5935/0100-4042.20140176

Publicado online: junho 30, 2014
PDF Informação suplementar
Quim. Nova 2014, 37(7), 1244-1248

 

Alterações em medicamentos mal acondicionados: uma estratégia para desenvolver habilidades investigativas, comunicação científica e interdisciplinaridade nas aulas de química

Jaqueline R. Maluta#,*


The physical alterations in poorly stored drugs represented in the picture were the framework by which several questions were raised. Thus, undergraduate students have to connect all the information, and investigate and test their hypotheses to solve the problem.

http://dx.doi.org/10.5935/0100-4042.20140184

Publicado online: julho 3, 2014
PDF Informação suplementar
Quim. Nova 2014, 37(7), 1249-1256

 

Uso de diagrama V modificado como relatório em aulas teórico-práticas de Química Geral

Maria Fernanda Campos Mendonça*; Márcia Regina Cordeiro; Keila Bossolani Kiill


This work proposes the use of the modified V diagram as a report in practical classes of general chemistry to assist students in establishing relationships between theoretical/conceptual and methodological knowledge concerning objects and/or events studied.

http://dx.doi.org/10.5935/0100-4042.20140211

Publicado online: julho 22, 2014
PDF Informação suplementar
Assuntos Gerais Quim. Nova 2014, 37(7), 1257-1261

 

Química verde: a evolução de um conceito

Eduardo F. Sousa-AguiarI; João M. A. R. de AlmeidaII; Pedro N. RomanoII,*; Rodrigo P. FernandesII; Yuri CarvalhoII


The topic "Green Chemistry" has gained great importance over recent years, being quoted in an increasing number of publications. This fact shows how concern over developing "greener" processes has played a prominent role in the scientific community.

http://dx.doi.org/10.5935/0100-4042.20140212

Publicado online: julho 22, 2014
PDF

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