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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. 42, No. 3, 2019, p. 249-364

 

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Artigo de Capa
Quim. Nova 2019, 42(3), 273-282

Modelos fotoquímicos simples como ferramenta para o gerenciamento da qualidade do ar

Cleyton M. da SilvaI,II,III; Bruno SicilianoI; Nicole J. de CarvalhoI; Sergio M. CorrêaII; Graciela ArbillaI,*

Using data provided by an automatic monitoring station, concentration and speciation data for volatile organic compounds and an air quality model, valuable information to understand ozone concentrations can be obtained.

http://dx.doi.org/10.21577/0100-4042.20170343

Publicado online: janeiro 23, 2019
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Artigos Quim. Nova 2019, 42(3), 249-254

 

Chemometric tools and ftir-atr spectroscopy applied in milk adulterated with cheese whey

Layane L. VinciguerraI; Marcelo C. A. MarceloII; Tanara M. C. MottaII; Leonardo Z. MeneghiniI; Ana M. BergoldI; Marco F. FerrãoII,*


An analytical method capable of identifying caseinomacropeptide by Fourier Transform Infrared Spectra was developed using chemometrics methods.

http://dx.doi.org/10.21577/0100-4042.20170337

Publicado online: fevereiro 18, 2019
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Quim. Nova 2019, 42(3), 255-261

 

Sensor potenciométrico basado en nanopartículas de sulfuro de plata soportadas en materiales carbonosos para la detección de cianuro libre

Andy Alfredo Cárdenas-RiojasI; Ademar WongII,III; Maria Del Pilar T. SotomayorII,III; Adolfo La Rosa-ToroI; Angélica María Baena-MoncadaI,*


Potentiometric sensor based on silver sulphide nanoparticles supported on hierarchical porous carbon (Ag2S/HPC400) as ink on a glassy carbon electrode for the detection of free cyanide (CN-).

http://dx.doi.org/10.21577/0100-4042.20170338

Publicado online: fevereiro 20, 2019
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Quim. Nova 2019, 42(3), 262-272

 

Disponibilidade de nutrientes e carbono orgânico em solos contendo carvão hidrotérmico lavado e não lavado e comparação com solos antropogênicos

Ariane Maziero SantanaI; Márcia Cristina BisinotiI; Camila Almeida MeloI; Odair Pastor FerreiraII; Altair Benedito MoreiraI,*


We evaluated the effect of the addition of different hydrochar ratios on latosol and argisols on nutrient release and compared them with anthropogenic soils known for their high fertility.

http://dx.doi.org/10.21577/0100-4042.20170339

Publicado online: fevereiro 20, 2019
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Quim. Nova 2019, 42(3), 283-288

 

Comparative study of TiO2 and zno application in hybrid solar cells using copolymer p3ot/p3mt

Letícia Fernanda Gonçalves LarssonI; Gideã Taques TractzI; Guilherme Arielo Rodrigues MaiaI; Guilherme José Turcatel AlvesII; Paulo Rogério Pinto RodriguesI,*; Maico Taras da CunhaI; Everson do Prado BanczekI


It is possible the use of copolymers (P3OT/P3MT) in hybrid solar cells, searching for new alternatives of materials photosensitizing. Photovoltaic comparative parameters of cells produced by TiO2 and ZnO with P3OT/P3MT were investigated in this paper.

http://dx.doi.org/10.21577/0100-4042.20170344

Publicado online: janeiro 23, 2019
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Quim. Nova 2019, 42(3), 289-295

 

Avaliação da extensão da biodegradação de petróleos brasileiros com ênfase nos n-alquilciclohexanos

Laercio Lopes MartinsI,#; Georgiana Feitosa da CruzI,*; Lívia Carvalho SantosI; Marcos Albieri PudenziII; Marcos Nogueira EberlinII


Assessing biodegradation extent of Brazilian petroleum samples by the new parameter H30/DC coupled to H30/AC based on the homologue series of n-alkylcyclohexanes (C13 to C26), using the mass chromatogram m/z 83 obtained by gas chromatography coupled to mass spectrometry.

http://dx.doi.org/10.21577/0100-4042.20170328

Publicado online: janeiro 24, 2019
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Quim. Nova 2019, 42(3), 296-304

 

The multirole of modified natural gums for multicomponent polymers: as coupling agents for polymers reinforced with cellulosic fibers or compatibilizers for biodegradable polymer blends

Jorge D. Inga-Lafebre; Héctor Pulido-González; Rubén González-Núñez; María E. Hernández-Hernández; Martín Rabelero-Velasco; Francisco J. Aranda-García; Carlos F. Jasso-Gastinel*


As an innovation, a maleated natural gum (pine rosin) is used here as coupling agent for fiber composites or compatibilizer for biodegradable polymer blends, improving its mechanical properties while preserving biodegradability.

http://dx.doi.org/10.21577/0100-4042.20170333

Publicado online: fevereiro 6, 2019
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Quim. Nova 2019, 42(3), 305-312

 

Síntese mecanoquímica de azinas acíclicas simétricas e determinação do fator de proteção solar uvb in vitro

Wesley Randson de Alcantara Campos; Débora Caroline Marques de Souza; Délis Galvão Guimarães; Victória Laysna dos Anjos Santos; Arlan de Assis Gonsalves; Cleônia Roberta Melo Araújo*


Development of solar filters using fast and low cost synthesis method.

http://dx.doi.org/10.21577/0100-4042.20170321

Publicado online: fevereiro 27, 2019
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Quim. Nova 2019, 42(3), 313-318

 

Chemical composition and acaricidal activities of Indigofera suffruticosa essential oil against two-spotted spider mite

Cleideana B. da SilvaI; Marcilio M. de MoraesII; Claudio A. G. da CamaraII,III,*; Nicolle de C. RibeiroIII; João P. R. de MeloIII; Vera L. M. de LimaI; Daniela M. A. F. NavarroIV


Essential oil analyses of Indigofera suffruticosa showed 89.9% of phenylpropanoids, with eugenol as major constituent. Oil and selected constituents showed toxicity and oviposition deterrence action against Tetranychus urticae.

http://dx.doi.org/10.21577/0100-4042.20170329

Publicado online: janeiro 24, 2019
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Quim. Nova 2019, 42(3), 319-328

 

Iron oxide and Fe2O3/Al2O3 used to catalyze removing hydrogen from tail chlorine at low temperature

Xi Liua, Ling Xue; Xiaoquan Chen; Jisheng Liu; Hanhan Wang; Jianwei Xue*; Fuxiang Li; Zhiping Lv


As is presented in the Figure, when the temperature was 30-150 ℃, the hydrogen and oxygen or chlorine were absorbed in the surface of catalyst and then generated water or hydrochloric acid.

http://dx.doi.org/10.21577/0100-4042.20170322

Publicado online: fevereiro 27, 2019
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Revisão Quim. Nova 2019, 42(3), 329-345

 

Fotocatálise mediada por TiO2 no estado nanoparticulado: revisão da reatividade pelo conceito de traps e algumas aplicações em química analítica

Alexandre L. B. Baccaro; Lucas D. Cordon; Felipe G. Nishimura; Ivano G. R. Gutz*


Events in a single nanoparticle of TiO2 during the UV-Irradiation: excitation of the electron (e-) from VB to CB generating holes (h+), the e-/h+ recombination, their trapping and charge transfer. Chemical O2 demand and sample pretreatment exemplify analytical applications.

http://dx.doi.org/10.21577/0100-4042.20170332

Publicado online: fevereiro 6, 2019
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Educação Quim. Nova 2019, 42(3), 346-354

 

Avaliação das causas de retenção em química geral na Universidade Federal do Amazonas

Klenicy K. L. Yamaguchi*; Jath da Silva e Silva


Evaluating teaching and learning processes and low pass rates in General Chemistry and interventional strategies that increase success rate.

http://dx.doi.org/10.21577/0100-4042.20170336

Publicado online: fevereiro 14, 2019
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Quim. Nova 2019, 42(3), 355-360

 

Determinação de Al3+, Fe3+ e Cu2+ presentes em sombras de maquiagem por espectrofotometria UV-VIS: uma proposta de experimento contextual em nível superior de ensino

lex Magalhães AlmeidaI; Ivani Pose MartinsI; Paula Maira Pinheiro AmaralI; Viviane Araújo BorgesI; Leonardo Augusto Silva PintoI; Elias Yuki IonashiroII; Nyuara Araújo da Silva MesquitaII; Márlon Herbert Flora Barbosa SoaresII;*


This work presents the determination of Al3+, Fe3+ and Cu2+ in eye shadows makeup a potential higher level didactic strategy for discussing some analytical chemistry concepts through contextualization assumptions in the teaching of chemistry.

http://dx.doi.org/10.21577/0100-4042.20170330

Publicado online: janeiro 30, 2019
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Assuntos Gerais Quim. Nova 2019, 42(3), 361-364

 

Uma aula de Walther Nernst no brasil

Cássius Klay NascimentoI; João Pedro BragaII,*


This paper is about the visit of Walther Hermann Nernst to Brazil, in 1914. The present study is based on the view the newspapers, at the time gave, to this visit and also based on the letters exchanged between Nernst's daughter and some of his former students.

http://dx.doi.org/10.21577/0100-4042.20170331

Publicado online: janeiro 31, 2019
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