JBCS



8:20, seg mai 29











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. 39, No. 1, 2016, p. 1-122

 

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 2016, 39(1), 63-80

Doença de Alzheimer: hipóteses etiológicas e perspectivas de tratamento

Anna De Falco; Daphne Schneider Cukierman; Rachel A. Hauser-Davis; Nicolás A. Rey*

Alzheimer's Disease is the prevalent cause of dementia worldwide. Unfortunately, as of yet, there is still no cure. The different molecular hypotheses behind this condition and their relation to available treatments and potential new drugs are discussed herein in detail.

http://dx.doi.org/10.5935/0100-4042.20150152

Publicado online: setembro 30, 2015
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Artigos Quim. Nova 2016, 39(1), 1-8

 

Nanoparticles of tungsten as low-cost monometallic catalyst for selective hydrogenation of 3-hexyne

María Juliana MaccarroneI,*; Cecilia LederhosI; Carolina BettiI; Nicolás CarraraI; Juan C. YoriI,II; Fernando Coloma PascualIII; Domingo LiprandiI,II; Carlos VeraI,II; Mónica QuirogaI,II


The catalyst 7.1WN/A was the most active and selective (94%) for the (Z)-alkene at 323 K. The selectivity of the catalyst compared favorably to that of the classical and more expensive Lindlar catalyst.

http://dx.doi.org/10.5935/0100-4042.20150170

Publicado online: novembro 11, 2015
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Quim. Nova 2016, 39(1), 9-13

 

Estudo da glicosilação do ciclo-hexanol com diferentes derivados de D-glicosamina e promotores de glicosilação pelo método de Koenigs-Knorr

Lucas L. FrancoI; Wagner G. CanhestroII; Vítor L. S. CunhaII; José D. S. FilhoI; Ricardo J. AlvesII,*


Silver carbonate efficiently promoted the glycosylation of cyclohexanol with peracetylated N-phtaloyl-α-D-glucosaminyl halides as compared to other promoters: silver trifatle and Mercury (II) bromide/mercury (II) oxide. The reaction did not work with three other glycosyl donors.

http://dx.doi.org/10.5935/0100-4042.20150174

Publicado online: novembro 25, 2015
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Quim. Nova 2016, 39(1), 14-18

 

Organic matter and humic fractions of a haplic acrisol as affected by composted pig slurry

Ana Cristina LüdtkeI; Deborah Pinheiro DickII,*; Celso AitaIII; Bruno PavanII; Luiza MorosinoII; Alexandre DonedaIII; Rafael Ricardo CantúIII


The addition of composted pig slurry, even in small amounts, to a sandy Acrisol affects the soil organic matter. As a consequence, the distribution of the humic fractions is altered, with an enhancement of humic acid micelles.

http://dx.doi.org/10.5935/0100-4042.20160001

Publicado online: janeiro 14, 2016
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Quim. Nova 2016, 39(1), 19-25

 

Synthesis and biological activity of new series of organotin(IV) esters with N,N-diacetylglycine

Muhammad AshfaqI,#; Muhammad Mahboob AhmedII; Salama ShaheenI; Rukhsana TabussamI; Gildardo RiveraIII,*


We report excellent antibacterial activity of organotin(IV) esters. The tendency for inhibition was found to be stronger against E. coli than other bacterial strains. Insecticidal toxicity was also determined.

http://dx.doi.org/10.5935/0100-4042.20150171

Publicado online: novembro 11, 2015
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Quim. Nova 2016, 39(1), 26-31

 

Comparison between asphaltenes (sub)fractions extracted from two different asphaltic residues: chemical characterization and phase behavior

Silas R. FerreiraI; Fabio R. BarreiraI; Luciana S. SpinelliI; Katia Z. LealII; Peter SeidlIII; Elizabete F. LucasI,IV,*


Optical micrographs of petroleum before (a) and after (b) asphaltene precipitation as a function of volume of n-heptane added.

http://dx.doi.org/10.5935/0100-4042.20150172

Publicado online: novembro 11, 2015
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Quim. Nova 2016, 39(1), 32-37

 

Estudo fitoquímico, atividade antimicrobiana e citotóxica de espécimes de Leonotis nepetifolia L. R. (Br)

Ana P. OliveiraI; Amanda L. GuimarãesI; Alessandra G. M. PachecoII; Camila S. AraújoII; Raimundo G. Oliveira JúniorI; Érica M. LavorI; Mariana G. SilvaI; Edigênia C. C. AraújoI; Rosemairy L. MendesI; Larissa A. RolimI; Marcília P. CostaIII; Henrique C. L. FariasIV,V; Cláudia do Ó PessoaIV,V; Norberto P. LopesVI; Lucas M. M. MarquesVI; Jackson R. G. S. AlmeidaI,*


This work isolates the compound 3',4',5-trihydroxy-6,7-dimethoxyflavone (cirsiliol) from the leaves of the cultivated Leonotis nepetifolia, and evaluates in vitro the crude ethanol extracts and phases with respect to their potential antimicrobial, cytotoxic, and antitumoral activity.

http://dx.doi.org/10.5935/0100-4042.20150160

Publicado online: outubro 26, 2015
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Quim. Nova 2016, 39(1), 38-43

 

Seasonal chemical compositions of the essential oils of two Eugenia species and their acaricidal properties

Paulo H. S. RibeiroI; Maria L. dos SantosI,*; Claudio A. G. da CamaraII; Flávia S. BornII; Christopher W. FaggIII


Eugenia species, widely dispersed in the cerrado, were investigated and study results indicate that their leaf essential oils feature notable amounts of α- and β-pinene, limonene, bicyclogermacrene, β-caryophyllene, spathulenol, and globulol, which exhibit acaricidal activity against T. urticae.

http://dx.doi.org/10.5935/0100-4042.20150161

Publicado online: outubro 26, 2015
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Quim. Nova 2016, 39(1), 44-48

 

Derivatización y caracterización espectroscópica de un biopolímero a base de L-lisina con análogos de la D-biotina: Co-poli(L-lisina)-graft-(ε-N-[X-D-biotinil]-L-lisina)

Flavio Dolores Martínez-Mancera; José Luis Hernández-López*


Schematic illustration of co-poly(L-lysine)-graft-(ε-N-[X-D-biotinyl]-L-lysine).

http://dx.doi.org/10.5935/0100-4042.20150173

Publicado online: novembro 11, 2015
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Quim. Nova 2016, 39(1), 49-57

 

Um método eficiente para a obtenção de derivados de 1-alquilamino-2,4-dinitrobenzeno e a redução regiosseletiva para a obtenção de derivados de 1-alquilamino-2-amino-4-nitrobenzeno

Cíntia de A. CustódioI,II; Simon J. GardenI,*


The title compounds were prepared by nucleophilic aromatic substitution of 2,4-dinitrochlorobenzene followed by regioselective reduction using stannous chloride suspended in EtOAc. The reduction products were characterized as the acetamide derivatives.

http://dx.doi.org/10.5935/0100-4042.20150175

Publicado online: novembro 25, 2015
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Quim. Nova 2016, 39(1), 58-62

 

Alcaloides acridônicos inibem catepsina L e V

Emerson F. MarquesI; Paulo C. VieiraI; Richele P. SeverinoI,II,*


Acridone alkaloids inhibit the enzyme cathepsin L as reversible competitive inhibitors with respect to the substrate Z-FR-MCA.

http://dx.doi.org/10.5935/0100-4042.20150176

Publicado online: novembro 25, 2015
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Revisão Quim. Nova 2016, 39(1), 81-93

 

Fases estacionárias de líquidos iônicos em cromatografia gasosa: fundamentos, avanços recentes e perspectivas

Leandro W. HantaoI,*; Bruna R. ToledoII; Fabio AugustoII


The application of ionic liquids (IL) as sorbent materials has proven highly successful in chemistry mainly due to their unique chemical and physical properties. As stationary phases in gas chromatography (GC), IL exhibit a multitude of requisites to provide highly efficient separations, namely, high thermal stability, negligible vapor pressure, and unique solvation properties.

http://dx.doi.org/10.5935/0100-4042.20150177

Publicado online: novembro 25, 2015
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Nota Técnica Quim. Nova 2016, 39(1), 94-99

 

Development and validation of analytical method for palm oil determination in microcapsules produced by complex coacervation

Paulo H. M. MarfilI,II,*; Felipe H. T. VasconcelosI; Márcia H. PontieriIII; Vânia R. N. TelisII


A spectrophotometric method was developed and validated for determining the microencapsulation efficiency of palm oil by complex coacervation.

http://dx.doi.org/10.5935/0100-4042.20150164

Publicado online: outubro 26, 2015
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Quim. Nova 2016, 39(1), 100-103

 

Desenvolvimento de ensaio para análise qualitativa de biodiesel em misturas diesel-biodiesel para aplicação em postos revendedores de combustíveis

Marcos A. A. Silva; Adhane T. D. Borges; Nelson R. Antoniosi Filho*


An assay was developed for use in petrol stations to determine the presence of biodiesel in diesel-biodiesel blends based on the visual observation of significant coloring of the products.

http://dx.doi.org/10.5935/0100-4042.20150165

Publicado online: outubro 26, 2015
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Educação Quim. Nova 2016, 39(1), 104-111

 

Motivação para a carreira docente e construção de identidades: o papel dos pesquisadores em ensino de química

Carmen Silvia da S. SáI,*; Wildson Luiz P. SantosII


The identities of the basic education teacher, higher education professor and bachelor's degree in chemistry/researcher circulate during a person's undergraduate degree, and the motivation to take on one of the identities depends on intrinsic and extrinsic factors affecting students and professors.

http://dx.doi.org/10.5935/0100-4042.20150155

Publicado online: setembro 30, 2015
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Quim. Nova 2016, 39(1), 112-117

 

Desenvolvimento de experimento didático de eletrogravimetria de baixo custo utilizando princípios da Química Verde

Guilherme Antonio FinazziI,*; Carlos Ney MartinsII; Milton Duffles CapelatoIII; Luiz Henrique FerreiraIII


Low-cost teaching experiments that obeyed the principles of Green Chemistry were developed. Copper electrogravimetry experiments were used because visual changes may be easily observed, thus facilitating the didactic exploration of gravimetric and electrochemical concepts.

http://dx.doi.org/10.5935/0100-4042.20150149

Publicado online: setembro 15, 2015
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Quim. Nova 2016, 39(1), 118-122

 

Espectro eletrônico da molécula I2: uma breve introdução à programação científica

Antonio G. Sampaio de Oliveira FilhoII,*; Ana Paula de Lima BatistaII


The electronic spectrum of the I2 molecule is calculated using scientific computing tools.

http://dx.doi.org/10.5935/0100-4042.20150168

Publicado online: outubro 26, 2015
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Geral Quim. Nova 2016, 39(1),

 

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