JBCS



3:56, ter fev 18

Acesso Aberto/TP



vol. 39, No. 2, 2016



Artigo de Capa
Quim. Nova 2016, 39(2), 194-209

Amazon rainforest cosmetics: chemical approach for quality control

Mariko FunasakiI,II,*; Hileia dos Santos BarrosoIII; Valdelira Lia Araújo FernandesII; Ingrid Sabino MenezesIV

Chemical aspects of fourteen species from Amazon rainforest used in cosmetics were reviewed for the purpose of quality control.

http://dx.doi.org/10.5935/0100-4042.20160008

Publicado online: janeiro 22, 2016
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Total access: 2613

Editorial Quim. Nova 2016, 39(2), 123

 

Novo modelo de financiamento para as publicações da SBQ

Diretoria, Conselho Consultivo e PubliSBQ


http://dx.doi.org/10.5935/0100-4042.20160039

Editorial

Total access: 1297

Artigo Quim. Nova 2016, 39(2), 124-129

 

Obtenção de compósitos híbridos baseados em hidrogéis e cimento portland

Jefferson C. dos SantosI; Mauro M. TashimaI; Marcia R. de MouraII; Fauze A. AouadaII,*


The presence of cement improves the mechanical property of hydrogel, and no phase separation between hydrogel and cement was detected.

http://dx.doi.org/10.5935/0100-4042.20160005

Publicado online: janeiro 22, 2016
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Quim. Nova 2016, 39(2), 130-136

 

Estiril-lactonas de Cryptocarya aschersoniana Mez. (Lauraceae Juss.) com atividade contra Meloidogyne spp. e interação in silico com provável fumarase de Meloidogyne hapla

Viviane A. C. CamposI; Alan R. T. MachadoI; Willian J. R. SilvaI; Karina C. LopesI; Willian C. TerraII; Vicente P. CamposII; Denilson F. OliveiraI,*


A bioguided fractionation of the extract from Cryptocarya aschersoniana resulted in the isolation of two active substances against root-knot nematodes (Meloidogyne spp.). According to an in silico study one of these substances inhibits the fumarate hydratase of these plant pathogens.

http://dx.doi.org/10.5935/0100-4042.20160010

Publicado online: fevereiro 5, 2016
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Total access: 3397

Quim. Nova 2016, 39(2), 137-145

 

MCR-ALS aplicado no monitoramento quantitativo do processo de eletrodegradação da atrazina usando espectros UV: resultados comparativos com HPLC-DAD como um método de referência

Thálisson S. SouzaI; Hudson G. ZaninII; Alfredo PeterlevitzII; Vitor BaranauskasII; Gilmare A. da SilvaIII; César ReisI; Efraim L. ReisI; Reinaldo F. TeófiloI,*


The electrodegradation of atrazine in water was performed using boron-doped diamond. The degradation was monitored by liquid chromatography and UV spectroscopy with multivariate curve resolution. The results were compared between the two methods.

http://dx.doi.org/10.5935/0100-4042.20160006

Publicado online: janeiro 22, 2016
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Total access: 1780

Quim. Nova 2016, 39(2), 146-155

 

Eletrodos de FTO modificados por eletrodeposição direta de ouro: produção, caracterização e aplicação como sensor eletroquímico

Rogério de Oliveira*; Fabio Luiz Pissetti; Alzira M. S. Lucho


Gold electrodeposition on FTO by cyclic voltammetry and the electrochemical impedance spectroscopy study showing the lowest impedance values for FTO with 100 scans of electrodeposition and the respective simulated electric circuit.

http://dx.doi.org/10.5935/0100-4042.20160011

Publicado online: fevereiro 5, 2016
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Total access: 2355

Quim. Nova 2016, 39(2), 156-159

 

Novel alkaloid from Rauvolfia capixabae (Apocynaceae)

Lanamar Almeida CarlosI,*; Leda MathiasII; Raimundo Braz-FilhoII; Ivo Jose Curcino VieiraII


Chemical structure of the novel sarpagine-type alkaloid, Na-methylrauflorine (1), isolated from Rauvolfia capixabae (Apocynaceae).

http://dx.doi.org/10.5935/0100-4042.20160002

Publicado online: janeiro 14, 2016
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Total access: 2358

Quim. Nova 2016, 39(2), 160-166

 

Application of parafac and OPLS-DA analyses on hplc fingerprints for the characterization of Hibiscus sabdariffa calyxes

Freddy A. Bernal; Luisa L. Orduz-Díaz; Ericsson Coy-Barrera*


HPLC-UV-DAD profiles of Hibiscus sabdariffa extracts were submitted to data mining by Parallel Factor model (PARAFAC) and the corresponding 3D-profile information could be discriminated by means of OPLS-DA.

http://dx.doi.org/10.5935/0100-4042.20160007

Publicado online: janeiro 22, 2016
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Total access: 1579

Quim. Nova 2016, 39(2), 167-171

 

A novel method for the determination of trace thorium by dispersive liquid-liquid microextraction based on solidification of floating organic drop

Mohammad RezaeeI,*; Faezeh KhalilianII


In this study, dispersive liquid-liquid microextraction based on the solidification of floating organic droplets was used for the preconcentration and determination of thorium in the water samples.

http://dx.doi.org/10.5935/0100-4042.20160012

Publicado online: fevereiro 5, 2016
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Total access: 1419

Quim. Nova 2016, 39(2), 172-179

 

Tratamento da vinhaça por adsorção em carvão de bagaço de cana-de-açúcar

Fernanda L. SeixasI,II,*; Marcelino L. GimenesI; Nádia R. C. Fernandes-MachadoI


Vinasse adsorption diagram in two stages.

http://dx.doi.org/10.5935/0100-4042.20160013

Publicado online: fevereiro 5, 2016
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Total access: 2718

Quim. Nova 2016, 39(2), 180-188

 

Avaliação da bioacumulação de metais em Cyprinus carpio pela interação com sedimento e água de reservatório

Carmen Lúcia Voigt*; Cleber Pinto da Silva; Sandro Xavier de Campos


Bioaccumulation is one of the most important processes among the various consequences of the presence of metals in the reservoirs; metals can accumulate in fish organs by exposure to contaminated sediment and water.

http://dx.doi.org/10.5935/0100-4042.20160014

Publicado online: fevereiro 5, 2016
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Total access: 2606

Quim. Nova 2016, 39(2), 189-193

 

Composição química das cascas das raízes e flores de Poincianella pyramidalis (Fabaceae)

José Cândido S. de OliveiraI; Jorge M. DavidI,*; Juceni P. DavidII


The chemical studies of root and flower extracts resulted in isolation of 3'-dimethylellagic acid and 3,3'-dimethylellagic acid-4'-O-β-D-xyloside, terpenes, fatty acid methyl derivates and fatty alcohols.

http://dx.doi.org/10.5935/0100-4042.20160015

Publicado online: fevereiro 5, 2016
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Total access: 2495

Revisão Quim. Nova 2016, 39(2), 210-220

 

Cromatografia por interações hidrofilicas (HILIC): estado da arte e aplicações

Carla Grazieli Azevedo da Silva*; Carla Beatriz Grespan Bottoli; Carol H. Collins


Hydrophilic interaction liquid chromatography (HILIC) is an effective technique for the separation of polar compounds, with separation properties complementary to reversed-phase high performance liquid chromatography (RP-HPLC), while eliminating some of the disadvantages of normal-phase high performance liquid chromatography (NP-HPLC).

http://dx.doi.org/10.5935/0100-4042.20160003

Publicado online: janeiro 14, 2016
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Total access: 2935

Nota Técnica Quim. Nova 2016, 39(2), 221-228

 

Uso do planejamento experimental para otimização de um procedimento voltamétrico para determinação simultânea das concentrações dos metais Zn, Cd, Pb e Cu livres em água de coco

Thalles R. Rosa*; José Guilherme A. Rodrigues; Rafael de Q. Ferreira


This study employed a factorial design and center composite design in the optimization of the main experimental parameters of SWASV (square-wave anodic stripping voltammetry) for the simultaneous determination of metals Zn, Cd, Pb and Cu free in coconut water.

http://dx.doi.org/10.5935/0100-4042.20160004

Publicado online: janeiro 14, 2016
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Total access: 2150

Quim. Nova 2016, 39(2), 229-237

 

2-(4-iodo-2,5-dimetoxifenil)-n-[(2-metoxifenil)metil]etamina ou 25i-nbome: caracterização química de uma designer drug

Pâmella F. dos SantosI; Lindamara M. SouzaII; Bianca B. MerloIII; Helber B. CostaII; Lilian V. ToseII; Heloá SantosII; Gabriela VaniniII; Leandro F. MachadoIV; Rafael S. OrtizV; Renata P. LimbergerVI; Boniek G. VazVII; Wanderson RomaoI,II,*


The chemical profile of a new designer drug, 2-(4-iodine-2,5-dimethoxyphenyl)-n-(2-methoxyphenyl)methyl]etamine or 25I-NBOMe, was explored using TLC, UV-Vis, ATR-FTIR, GC-MS and ESI-FT-ICR MS.

http://dx.doi.org/10.5935/0100-4042.20150178

Publicado online: novembro 25, 2015
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Total access: 3957

Educação Quim. Nova 2016, 39(2), 238-244

 

Blogs no ensino de química: análise de comentários publicados em disciplina de comunicação científica

Mario Roberto Barro; Lea Veras; Salete Linhares Queiroz*


Development and integration of blogs in undergraduate chemistry teaching.

http://dx.doi.org/10.5935/0100-4042.20150180

Publicado online: novembro 25, 2015
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Total access: 1910

Quim. Nova 2016, 39(2), 245-249

 

Proposta experimental didática para o ensino de análise de componentes principais

Leonardo Valderrama; Vassula Belinato Paiva; Paulo Henrique Março; Patrícia Valderrama*


An experiment to teach principal component analysis (PCA) is proposed based on the extraction of anthocyanins from red cabbage and measurement of the UV-Vis spectra in buffer solutions with pH 1.89-12.01.

http://dx.doi.org/10.5935/0100-4042.20150166

Publicado online: outubro 26, 2015
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Total access: 3450

Quim. Nova 2016, 39(2), 250-259

 

Conhecimento pedagógico e conhecimento químico na formação de professores: a construção da identidade docente

Karla F. Dias CassianoI,*; Nyuara A. da Silva MesquitaII; Pabline Galvao RibeiroI


This study describes the construction of the teaching identity of chemistry teachers training at the Federal Institute of Goiás, Brazil, and focuses on the existing tensions between pedagogical and chemical knowledge.

http://dx.doi.org/10.5935/0100-4042.20150167

Publicado online: outubro 26, 2015
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Total access: 2722

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