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6:19, sáb ago 29






Edição Atual vol. 38, No. 6, 2015, p. 757-876



Artigo de Capa
Quim. Nova 2015, 38(6), 817-827

Biossensoriamento estocástico via nanoporo proteico individual no desenvolvimento de ferramentas analíticas

Juliana P. Aguiar; Janilson J. S. Júnior; Dijanah C. Machado; Maria C. A. Melo; Cláudio G. Rodrigues*

Alpha-toxin as prototype of a single protein nanopore for detection, quantification and characterization of molecules in aqueous systems.

http://dx.doi.org/10.5935/0100-4042.20150073

Publicado online: abril 30, 2015
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Artigos Quim. Nova 2015, 38(6), 757-761

 

Bis(4-Fluorophenylsulfonyldithiocarbimato)zincate(II) salts: new antifungals for the control of Botrytis blight

Alexandre A. OliveiraI; Marcelo R. L. OliveiraI,*; Mayura M. M. RubingerI; Elisa L. PilóI; Daniele C. MenezesI; Laércio ZambolimII


Petri dishes containing colonies of Botrytis cinerea after 3 days of incubation at 22 ºC, were treated with tetraphenylphosphonium bis(4-fluorophenylsulphonyldithiocarbimate) zincate(II) at six different concentrations and compared to a control (negative treatment check).

http://dx.doi.org/10.5935/0100-4042.20150075

Publicado online: maio 8, 2015
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Quim. Nova 2015, 38(6), 762-768

 

Influência da idade das folhas de Eugenia uniflora L. na composição química do óleo essencial

Frances R. SantosI; Raimundo Braz-FilhoI,II,#; Rosane N. CastroI,*


Oxygenated sesquiterpenes, furanodiene and germacrone were predominant in the essential oil of Eugenia uniflora and distinguished with respect to the age of the leaves.

http://dx.doi.org/10.5935/0100-4042.20150072

Publicado online: abril 30, 2015
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Quim. Nova 2015, 38(6), 769-776

 

Chemical constituents from the stem bark of Annona pickelii (Annonaceae)

Emmanoel Vilaça CostaI,II,*; Marília Fernanda Chaves SampaioIII; Marcos José SalvadorIV; Angelita NepelV; Andersson BarisonV


Twenty compounds, including three lignans and twelve alkaloids, were found in stem bark A. pickelli and the NMR data for several alkaloids were reviewed.

http://dx.doi.org/10.5935/0100-4042.20150069

Publicado online: abril 28, 2015
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Quim. Nova 2015, 38(6), 777-780

 

Caracterização de nanofios de germânio sintetizados utilizando cobre como catalisador

Riama Coelho GouveiaI,II,*; Hanay KamimuraI; Rafael MunhozI; Ariano De Giovanni RodriguesI; Edson Roberto LeiteIII; Adenilson José ChiquitoI


Ge nanowires grown from Cu catalyst. Morphological analysis showed that the nanowires are composed of single crystalline germanium with long range order. Electrical characterization confirmed the semiconductor behavior and identified VRH as the dominant transport mechanism.

http://dx.doi.org/10.5935/0100-4042.20150081

Publicado online: maio 19, 2015
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Quim. Nova 2015, 38(6), 781-786

 

Development of oral nifedipine-loaded polymeric nanocapsules: physicochemical characterisation, photostability studies, in vitro and in vivo evaluation

Monika Piazzon TagliariI; Andrea GranadaI; Marcos Antonio Segatto SilvaI; Hellen Karine StulzerI,*; Betina Giehl Zanetti-RamosII; Daniel FernandesIII; Izabella Thais SilvaIV; Claudia Maria Oliveira SimõesIV; Regina SordiV; Jamil AssreuyV; Valdir SoldiVI


Development of nifedipine nanocapsules by interfacial deposition: a strategy to improve drug stability.

http://dx.doi.org/10.5935/0100-4042.20150076

Publicado online: maio 8, 2015
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Quim. Nova 2015, 38(6), 787-793

 

Association of branched polyethylene imine with surfactants in aqueous solution

Ismael C. BellettiniI,IV,*; Renato EisingII; Arlindo C. FelippeIII; Josiel B. DomingosIV; Edson MinattiIV; Vanderlei G. MachadoIV


Change of the pH of aqueous solutions of SDS-PEI, TTAB-PEI (●) and NaBr-PEI (●).

http://dx.doi.org/10.5935/0100-4042.20150085

Publicado online: maio 21, 2015
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Quim. Nova 2015, 38(6), 794-800

 

Identificação de compostos orgânicos em lixiviado de aterro sanitário municipal por cromatografia gasosa acoplada a espectrometria de massas

Eliane Sloboda Rigobello*; Ana Paula Jambers Scandelai; Beatriz Lopes Corso; Célia Regina Granhen Tavares


The LLE landfill leachate was evaluated under different conditions. The analyses carried out with a gas chromatograph coupled with a mass spectrometer allowed the identification of organic compounds in the leachate in the study.

http://dx.doi.org/10.5935/0100-4042.20150092

Publicado online: maio 29, 2015
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Quim. Nova 2015, 38(6), 801-806

 

Determinação voltamétrica simultânea de besilato de anlodipino e hidroclorotiazida em amostras de urina sintética utilizando um eletrodo de diamante dopado com boro

Laís Pereira Silva; Bruna C. Lourencao; Orlando Fatibello-Filho*


Voltammetric behavior of amlodipine besylate and hydrochlorothiazide on borondoped diamond electrode with hydrogen or oxygen terminations.

http://dx.doi.org/10.5935/0100-4042.20150077

Publicado online: maio 8, 2015
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Quim. Nova 2015, 38(6), 807-812

 

Desenvolvimento de um método de preparo de amostras para avaliação de matérias-primas de materiais escolares

José A. Garcia#; Edenir R. Pereira-Filho*


Evaluation of sample preparation method using microwave radiation, targeting the extraction of Ba, Cd, Cr, Hg and Pb in raw material samples of school supplies.

http://dx.doi.org/10.5935/0100-4042.20150070

Publicado online: abril 28, 2015
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Quim. Nova 2015, 38(6), 813-816

 

Phytochemical and phylogenetic analysis of Spondias (Anacardiaceae)

Cristiane PereiraI,*; Letícia L. de OliveiraII; Ricardo GonçalvesIII; Ana Claudia F. AmaralIV; Ricardo M. KusterI; Cassia M. SakuraguiIII


The presence of flavonol 3-O-glycosides can be considered a synapomorphy of American Spondias, and the presence of rhamnetin 3-O-rutinoside coupled with phylogenetic data is evidence for the separation of the two Atlantic forest Spondias species in a distinct clade.

http://dx.doi.org/10.5935/0100-4042.20150087

Publicado online: maio 21, 2015
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Revisão Quim. Nova 2015, 38(6), 828-835

 

Produção do biometanol via gaseificação de biomassa lignocelulósica

Paulo EichlerI; Fernando SantosI,*; Marcilio ToledoI; Patrícia ZerbinI; Guilherme SchmitzI; Camila AlvesI; Lúcias RiesI; Fernando GomesII


Simplified fluxogram for biomethanol production processes with lignocellulosic biomass.

http://dx.doi.org/10.5935/0100-4042.20150088

Publicado online: maio 21, 2015
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Nota Técnica Quim. Nova 2015, 38(6), 836-841

 

Análise multivariada de imagens na química: um experimento para determinação do pH de águas potáveis

Deangelis DamascenoI; Thiago G. ToledoII; Mariana S. GodinhoII; Cassiano P. da SilvaIII; Sérgio B. de OliveiraIV; Anselmo E. de OliveiraII,*


A Multivariate Image Analysis (MIA) laboratory activity was proposed estimating pH of drinking water samples from its digital images after adding bromothymol blue as a pH indicator, and using the PLS multivariate calibration method.

http://dx.doi.org/10.5935/0100-4042.20150082

Publicado online: maio 19, 2015
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Quim. Nova 2015, 38(6), 842-847

 

Avaliação de diferentes reagentes colorimétricos para a determinação de formaldeído em amostras de ar em ambientes internos

Darllene Silveira; Jessica Oliveira Fernandes; Elisabete Alves Pereira*


Formaldehyde reacts with MBTH to form an azine, which is oxidized by a ferric chloride in acid media to form a blue cationic dye. Formaldehyde reacts with Purpald reagent in alkaline media to form a purple anion dye. The Nash reagent method relies on the reaction of formaldehyde with acetylacetone in acidified ammonium acetate to form a yellow product.

http://dx.doi.org/10.5935/0100-4042.20150078

Publicado online: maio 8, 2015
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Quim. Nova 2015, 38(6), 848-851

 

Pesticide residues in conventionally and organically grown tomatoes in Espírito Santo (Brazil)

Gleissy M. A. D. A. dos SantosI; Luciano J. Q. TeixeiraII; Olavo S. Pereira JúniorIII; Alexandre R. dos SantosIV; Marcio FronzaI; Ary G. Da SilvaI; Rodrigo SchererI,*


The objective of this paper was to monitor pesticide residues in conventionally and organically grown tomatoes from different markets in Vitória and Vila Velha cities (Espírito Santo, Brazil).

http://dx.doi.org/10.5935/0100-4042.20150051

Publicado online: abril 1, 2015
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Quim. Nova 2015, 38(6), 852-858

 

Avaliação metrológica da curva analítica para determinação do teor de enxofre em baixíssimas concentrações em óleo diesel S-10

Shirley L. de FariasI,II; Lívio G. da CostaI; Rodrigo F. CaliliII; Ramon M. RiosIII; Elcio C. de OliveiraI,II,*


This work, on the determination of very low concentrations of sulfur content in diesel S-10 by MWDXRF, breaks two paradigms: every curve should be adjusted by an unweighted linear regression and all samples must be read in the central part of the analytical curve.

http://dx.doi.org/10.5935/0100-4042.20150071

Publicado online: abril 28, 2015
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Quim. Nova 2015, 38(6), 859-863

 

Prototipagem de microrreatores fotocatalíticos e testes de fotodegradação de corantes orgânicos

Omar PandoliI,*; Tommaso Del RossoII; Vinicius Modolo SantosI,III; Renan de Siqueira RezendeI; Bojan A. MarinkovicIII


Schematic diagram depicting adopted procedure for low-cost microfabrication of a PDMS/Glass microreactor.

http://dx.doi.org/10.5935/0100-4042.20150079

Publicado online: maio 8, 2015
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Quim. Nova 2015, 38(6), 864-867

 

Degradação térmica de tocoferol e produtos de oxidação em diferentes classes de azeite de oliva utilizando espectroscopia UV-Vis e MCR-ALS

Rhayanna P. Gonçalves; Paulo H. Março; Patrícia Valderrama*


The instrumental signals (D), relating to components of olive oil samples, were isolated and resolved by MCR-ALS in terms of quantitative contributions on the pure components (C) and spectral profiles (ST), respectively.

http://dx.doi.org/10.5935/0100-4042.20150074

Publicado online: abril 30, 2015
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Educação Quim. Nova 2015, 38(6), 868-873

 

Desenvolvimento de fármacos por hibridação molecular: uma aula prática de química medicinal usando comprimidos de paracetamol e sulfadiazina e a ferramenta virtual SciFinder®

Cleônia Roberta Melo Araújo*; Carlos Alberto Leite Filho; Victória Laysna dos Anjos Santos; Gabriela Lemos de Azevedo Maia; Arlan de Assis Gonsalves


Drug development by molecular hybridization: a medicinal chemistry practice class using paracetamol and sulfadiazine tablets and the virtual tool SciFinder®.

http://dx.doi.org/10.5935/0100-4042.20150053

Publicado online: abril 1, 2015
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Quim. Nova 2015, 38(6), 874-876

 

Acetanilida: síntese verde sem solvente

Silvio CunhaI,II,*; Otelício Bispo dos Santos da CostaI,II; Lourenço Luis Botelho de SantanaI,II; Wilson Araújo Lopes I,II


A solvent-free synthesis of acetanilide without the use of additives was developed in the context of green chemistry.

http://dx.doi.org/10.5935/0100-4042.20150080

Publicado online: maio 8, 2015
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