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22:49, sáb mar 23








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.

Artigos no Prelo


Artigos

TARGETED AND NON-TARGETED ANALYSIS BASED ON ULTRA HIGH PERFORMANCE LIQUID CHROMATOGRAPHY AND FOURIER TRANSFORM INFRARED SPECTROSCOPY FOR PARIS SPECIES OF DIFFERENT GEOGRAPHICAL ORIGINS

Yuangui Yang; Yanli Zhao; Ji Zhang; Shaobing Yang; Yuanzhong Wang

A method was developed and validated for evaluation of different species and geographical origins using targeted quantitative analysis and non-targeted FT-IR spectroscopy.

http://dx.doi.org/10.21577/0100-4042.20170348

Publicado online: março 18, 2019
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CARACTERIZAÇÃO QUÍMICA E AVALIAÇÃO DA CITOTOXICIDADE DE UM HETEROPOLISSACARÍDEO ISOLADO DA BIOMASSA DO Colletotrichum gloeosporioides

Samara M. A. Alexandre; Maria de Lourdes Corradi da Silva; Ana F. D. Vasconcelos; Dalita G. S. M. Cavalcante; Aldo E. Job; Luciana G. Ferreira; Miguel D. Noseda; Maria E. R. Duarte

A heteropolysaccharide with a main chain composed by β-D-galactofuranosidic units (1→5) and (1→6) linked with residues α-D-glupiranosidic as a branch was isolated from C. gloeosporioides biomass. It did not present cytotoxic activity on CHO-K1 cells.

http://dx.doi.org/10.21577/0100-4042.20170347

Publicado online: março 13, 2019
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EVALUATION OF COCAINE SAMPLES SEIZED IN THE STREETS OF THE STATE OF RIO DE JANEIRO, BRAZIL

Luiza D. Sant'Ana; Valeria C. de Sousa; Frances R. dos Santos; Bruno D. Sabino; Amadeu Cardoso; Marco Edilson F. de Lima; Rosane N. Castro

Differences in average composition of freebase cocaine and hydrochloride cocaine, showing that hydrochloride cocaine seized in the state of Rio de Janeiro is majorly composed of non-active compounds (diluents), while freebase cocaine is majorly composed of active compounds.

http://dx.doi.org/10.21577/0100-4042.20170346

Publicado online: março 13, 2019
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PREPARATION AND CHARACTERIZATION OF A QUERCETIN-TETRAETHYL ETHER-BASED PHOTOPROTECTIVE NANOEMULSION

Marlucy da Cruz Gonçalves; Viviane Martins R. dos Santos; Jason Guy Taylor; Fernanda Barçante Perasoli; Orlando David H. dos Santos; Ana Carolina S. Rabelo; Joamyr Victor Rossoni Junior; Daniela Caldeira Costa; Thiago Cazati

Synthesis of Quercetin derivative, UV analysis, FPS calculation, photo stability and incorporation in a sun protection formulation.

http://dx.doi.org/10.21577/0100-4042.20170345

Publicado online: março 13, 2019
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CHARACTERIZATION OF SEVERAL GENERATIONS OF NiMo HYDROPROCESSING CATALYSTS EMPLOYED IN THE SAME HYDROTREATER

Tatiana Marques Pessanha; Carolina Leão Quintanilha; Cristiano Nunes da Silva; Julio Carlos Afonso

The amount and variety of foreign elements deposited on NiMo/Al2O3 catalysts increased and coke became more aromatic in the most recent generations as expected from the more drastic HDS conditions and the quality of the crude diesel.

http://dx.doi.org/10.21577/0100-4042.20170323

Publicado online: fevereiro 27, 2019
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IRON OXIDE AND Fe2O3/Al2O3 USED TO CATALYZE REMOVING HYDROGEN FROM TAIL CHLORINE AT LOW TEMPERATURE

Xi Liu; 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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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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DISPONIBILIDADE DE NUTRIENTES E CARBONO ORGÂNICO EM SOLOS CONTENDO CARVÃO HIDROTÉRMICO LAVADO E NÃO LAVADO E COMPARAÇÃO COM SOLOS ANTROPOGÊNICOS

Ariane Maziero Santana; Márcia Cristina Bisinoti; Camila Almeida Melo; Odair Pastor Ferreira; Altair Benedito Moreira

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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SENSOR POTENCIOMÉTRICO BASADO EN NANOPARTÍCULAS DE SULFURO DE PLATA SOPORTADAS EN MATERIALES CARBONOSOS PARA LA DETECCIÓN DE CIANURO LIBRE

Andy Alfredo Cárdenas-Riojas; Ademar Wong; Maria Del Pilar T. Sotomayor; Adolfo La Rosa-Toro; Angélica María Baena-Moncada

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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CHEMOMETRIC TOOLS AND FTIR-ATR SPECTROSCOPY APPLIED IN MILK ADULTERATED WITH CHEESE WHEY

Layane L. Vinciguerra; Marcelo C. A. Marcelo; Tanara M. C. Motta; Leonardo Z. Meneghini; Ana M. Bergold; Marco F. Ferrão

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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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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CHEMICAL COMPOSITION AND ACARICIDAL ACTIVITIES OF Indigofera suffruticosa ESSENTIAL OIL AGAINST TWO-SPOTTED SPIDER MITE

Cleideana B. da Silva; Marcilio M. de Moraes; Claudio A. G. da Camara; Nicolle de C. Ribeiro; João P. R. de Melo; Vera L. M. de Lima; Daniela M. A. F. Navarro

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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AVALIAÇÃO DA EXTENSÃO DA BIODEGRADAÇÃO DE PETRÓLEOS BRASILEIROS COM ÊNFASE NOS N-ALQUILCICLOHEXANOS

Laercio Lopes Martins; Georgiana Feitosa da Cruz; Lívia Carvalho Santos; Marcos Albieri Pudenzi; Marcos Nogueira Eberlin

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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COMPARATIVE STUDY OF TiO2 AND ZnO APPLICATION IN HYBRID SOLAR CELLS USING COPOLYMER P3OT/P3MT

Letícia Fernanda Gonçalves Larsson; Gideã Taques Tractz; Guilherme Arielo Rodrigues Maia; Guilherme José Turcatel Alves; Paulo Rogério Pinto Rodrigues; Maico Taras da Cunha; Everson do Prado Banczek

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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MODELOS FOTOQUÍMICOS SIMPLES COMO FERRAMENTA PARA O GERENCIAMENTO DA QUALIDADE DO AR

Cleyton M. da Silva; Bruno Siciliano; Nicole J. de Carvalho; Sergio M. Corrêa; Graciela Arbilla

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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Revisão

LASER INDUCED-BREAKDOWN SPECTROSCOPY (LIBS): HISTÓRICO, FUNDAMENTOS, APLICAÇÕES E POTENCIALIDADES

Vinicius C. Costa; Amanda S. Augusto; Jeyne P. Castro; Raquel C. Machado; Daniel F. Andrade; Diego V. Babos; Marco A. Sperança; Raimundo R. Gamela; Edenir R. Pereira-Filho

LIBS applications in a myriad of samples: agriculture, food and electronic waste.

http://dx.doi.org/10.21577/0100-4042.20170325

Publicado online: março 11, 2019
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METABOLÔMICA MICROBIANA: INOVAÇÕES E APLICAÇÕES

João Raul Belinato; Jaqueline Moraes Bazioli; Alessandra Sussulini; Fabio Augusto; Taícia Pacheco Fill

Microbial metabolomics has been applied in several microbiological areas. The metabolomics workflow mainly involves quenching and extraction of metabolites, instrumental analysis, processing and data analysis, all of these steps acting together essentially.

http://dx.doi.org/10.21577/0100-4042.20170324

Publicado online: fevereiro 27, 2019
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ORGANOCATÁLISE ENANTIOSSELETIVA: EVOLUÇÃO E ASPECTOS RECENTES

Fernanda G. Finelli; Bruno M. da S. Santos; Lívia C. R. M. da Frota

This tutorial review presents, in a concise way, a general and contemporary view of the rise of Enantioselective Organocatalysis in the Asymmetric Catalysis, following the evolution of the area from its versatile generic modes of catalyst activation.

http://dx.doi.org/10.21577/0100-4042.20170334

Publicado online: fevereiro 6, 2019
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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

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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EFFECT OF THE NATURE OF THE ELECTROLYTE AND THE NATURE OF THE INTERFACE ON THE HYDROGEN EVOLUTION POTENTIAL: EXPERIMENTS FOR CHEMISTRY STUDENTS

Silvia Maria Leite Agostinho; Ruth Flavia Vera Villamil Jaimes; Lucas Vairolette; Isis Valença de Souza Santos

Hydrogen evolution reaction on copper cathode in sulfuric acid solution by electrolysis.

http://dx.doi.org/10.21577/0100-4042.20170335

Publicado online: fevereiro 11, 2019
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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

Alex Magalhães Almeida; Ivani Pose Martins; Paula Maira Pinheiro Amaral; Viviane Araújo Borges; Leonardo Augusto Silva Pinto; Elias Yuki Ionashiro; Nyuara Araújo da Silva Mesquita; Márlon Herbert Flora Barbosa Soares

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

A CONTRIBUIÇÃO DO BRASIL PARA A DESCOBERTA DE UM NOVO ELEMENTO QUÍMICO - O PALÁDIO

Luciano E. Faria; Carlos A. L. Filgueiras

The discovery of palladium was confirmed in minerals from Minas Gerais, containing Pd in natural gold alloys, as in the sample shown above.

http://dx.doi.org/10.21577/0100-4042.20170349

Publicado online: março 21, 2019
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UMA AULA DE WALTHER NERNST NO BRASIL

Cássius Klay Nascimento; João Pedro Braga

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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