JBCS



2:11, qui set 19








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

IMPACT OF TEMPERATURE ON THE STABILITY OF SILKWORM COCOON FIBERS

Bruno Luís Sacco; Henrique de Santana

Raman spectra of raw and processed cocoons were compared at different excitation radiations. By correlating the intensity ratios of the deconvoluted Raman bands using the broad bands characteristic of amide I and III, it was possible to evaluate the conformational changes in both materials.

http://dx.doi.org/10.21577/0100-4042.20170413

Publicado online: setembro 18, 2019
PDF

ESTUDO ELETRÔNICO DA REATIVIDADE DA 8-HIDROXIQUINOLINA SUBSTITUÍDA FRENTE AO SÍTIO DE LIGAÇÃO DO PEPTÍDEO β-AMILOIDE AO ÍON ZINCO

Talis U. Silva; Sérgio de Paula Machado

Removing process Zn2+ in Aβ peptide bind site: interaction of 8-HQ derivative HOMO orbital with ZnAβ site LUMO orbital.

http://dx.doi.org/10.21577/0100-4042.20170411

Publicado online: setembro 11, 2019
PDF

HDL-PARTICLES SEPARATION EMPLOYING DIFFERENT PRECIPITATING AGENTS: FUNCTIONAL PROPERTIES OF THE IMPACT OF CHEMICAL PRECIPITATION ON LIPOPROTEIN PARTICLE-SIZE AND PARAOXONASE-1-ACTIVITY

Vanessa R. A. e Silva; Elaine C. Albuquerque; Ana Paula C. dos Santos; Julio C. A. Santos; Lazaro S. S. Junior; William A. Presada; Carmen G. C. de M. Vinagre; Ricardo D. Couto

Three different precipitating solutions were tested for HDL particle-size determination: polyethylene glycol (PEG) 8000 (200 g L-1) (P1); phosphotungstic acid-Ca+2 (3 g L-1) (P2); and dextran sulfate/MgCl2 (15 g L-1) (P3).

http://dx.doi.org/10.21577/0100-4042.20170410

Publicado online: setembro 11, 2019
PDF

AVALIAÇÃO DO PERFIL DE LIBERAÇÃO DO FÁRMACO IBUPROFENO EM MEMBRANAS SIMÉTRICAS E ASSIMÉTRICAS DE ACETATO DE CELULOSE: EFEITO DA MORFOLOGIA

Marcos V. Ferreira; Lauro A. Pradela Filho; André L. dos Santos; Regina M. Takeuchi; Rosana M. N. de Assunção

Cellulose acetate (CA) membranes with different morphologies - symmetric and asymmetric - were loaded with ibuprofen (IBF) and showed the effect of morphology on the drug releasing curves. These curves were directly obtained by square-wave voltammetry (SWV) measurements.

http://dx.doi.org/10.21577/0100-4042.20170409

Publicado online: setembro 11, 2019
PDF

THEORETICAL STUDIES ON THE NEW HIGH-NITROGEN EXPLOSIVES N14 AND N18

Jifeng Chen; Yi Yu; Yuchuan Li; Siping Pang

Two novel explosives have an excellent power, and their detonation performance are all comparable to CL-20. Besides, their impact sensitivities are slightly better than CL-20, therefore they are promising candidates in energetic materials.

http://dx.doi.org/10.21577/0100-4042.20170408

Publicado online: agosto 30, 2019
PDF Informação suplementar

ANÁLISES MELISSOPALINOLÓGICAS, FÍSICO-QUÍMICAS, ATIVIDADE ANTIRRADICALAR E PERFIL QUÍMICO POR UPLC-DAD-QTOF-MS/MS DOS MÉIS DE Frieseomelitta doederleini (ABELHA BRANCA): COMPARAÇÃO COM OS FENÓLICOS PRESENTES NAS FLORES DE Mimosa tenuiflora (JUREMA PRETA)

Rogelio M. Santisteban; Sonia P. Cabrera; José F. Neto; Eva M. S. Silva; Rebert C. Correia; Rodolfo F. Alves; Francisco de A. R. dos Santos; Celso A. Camara; Tania M. S. Silva

Frieseomelitta doederleini (abelha branca) bee nest. ESI base peak ion (BPI) chromatogram of phenolics extracted from Frieseomelitta doederleini honey bee and analyzed by UPLC-QTOF-MS.

http://dx.doi.org/10.21577/0100-4042.20170407

Publicado online: agosto 30, 2019
PDF Informação suplementar

SYNTHESIS OF MESOPOROUS γ-ALUMINA AND ITS CATALYTIC PERFORMANCE IN DICHLOROPROPANOL CYCLIZATION

Huimin Yang; Ruyue Han; Fuxiang Li

Use KH560-540 as a template to synthesize mesoporous alumina, before the calcination, the methoxy group at the end of the template molecule is hydrolyzed to form a siloxy group, which combines with the aluminumoxy group produced by hydrolysis of aluminum source.

http://dx.doi.org/10.21577/0100-4042.20170404

Publicado online: agosto 30, 2019
PDF

DESENVOLVIMENTO DE METODOLOGIA DE REVELAÇÃO DE IMPRESSÃO DIGITAL LATENTE COM CHALCONAS

Jaqueline D. Balsan; Bruno N. Rosa; Claudio M. P. Pereira; Clarissa M. M. Santos

The synthesized chalcones represent as promising and new class of latent fingerprint powder developers as alternative and ecologically correct.

http://dx.doi.org/10.21577/0100-4042.20170399

Publicado online: agosto 26, 2019
PDF Informação suplementar

FOODÔMICA POR RMN DE 1H PARA MONITORAMENTO DA ESTABILIDADE OXIDATIVA DE MARGARINAS SUBMETIDAS AO TRATAMENTO TÉRMICO

Vinícius S. Pinto; Anna K. Nery; Luciano M. Lião

Use of NMR and PCA in the identification of oxidation products in brazilian margarines subjected to thermal stress.

http://dx.doi.org/10.21577/0100-4042.20170397

Publicado online: agosto 20, 2019
PDF

EFEITO DO PH, ESPÉCIE E CONCENTRAÇÃO IÔNICA NA ABSORÇÃO DE ÁGUA DE HIDROGÉIS BIONANOCOMPÓSITOS CONSTITUÍDOS DE CMC/PAAM/LAPONITA RDS

João A. F. Garcia; Márcia R. de Moura; Fauze A. Aouada

This paper presents the detailed study of the effects of pH, intensity and ionic species on the mechanism of water absorption of the bionanocomposite hydrogels based on carboxymethylcellulose and laponite nanoclay.

http://dx.doi.org/10.21577/0100-4042.20170396

Publicado online: agosto 20, 2019
PDF

Revisão

QUÍMICA DO LÚPULO

Renato S. Durello; Lucas M. Silva; Stanislau Bogusz Jr.

In this scientific paper we present a critical and comprehensive review about hop chemistry and their role in the brewing process.

http://dx.doi.org/10.21577/0100-4042.20170412

Publicado online: setembro 11, 2019
PDF

BIORREMEDIAÇÃO DE EFLUENTES POR MEIO DA APLICAÇÃO DE MICROALGAS - UMA REVISÃO

Guilherme Dias; Matheus Hipólito; Fernando Santos; Rogério Lourega; Jaqueline de Mattia; Paulo Eichler; Jonathan Alves

Bioremediation of industrial effluent using microalgae.

http://dx.doi.org/10.21577/0100-4042.20170393

Publicado online: agosto 1, 2019
PDF

Nota Técnica

WATER VERSUS LACTOSE SOLUTION AS A DISPERSION MEDIUM FOR PARTICLE ANALYSIS IN SWEETENED CONDENSED MILK BY LASER DIFFRACTION

João Pablo F. Pereira; Igor L. de Paula; Rodrigo Stephani; Ítalo T. Perrone; Luiz Fernando C. de Oliveira; Antonio F. de Carvalho

The sweetened condensed milks were analyzed by microscopy (usual method) and by laser particle size analysis using two different dispersion media (water and a lactose solution) and different solubilization times to seek the characterization of the samples using the laser scattering.

http://dx.doi.org/10.21577/0100-4042.20170406

Publicado online: agosto 30, 2019
PDF

DESENVOLVIMENTO E VALIDAÇÃO DE MÉTODO PARA DETERMINAÇÃO DE BISFENOL A E ETINILESTRADIOL EM AGUAPÉ E MINI-PAPIRO PROVENIENTES DE WETLANDS CONSTRUÍDAS

Julyenne M. Campos; Denis M. Roston; Sonia C. N. Queiroz

Analysis of bisphenol A (BPA) and ethinylestradiol (EE2) in Dwarf papyrus and Water hyacinth by high performance liquid chromatography (HPLC) coupled to fluorescence detector (FL).

http://dx.doi.org/10.21577/0100-4042.20170402

Publicado online: agosto 30, 2019
PDF

Educação

APLICAÇÃO DE CONDIMENTOS NA REVELAÇÃO DE IMPRESSÕES DIGITAIS LATENTES: UM EXPERIMENTO NO ENSINO DE QUÍMICA

Caroline Nicolodi; Bruno Nunes da Rosa; Caroline Carapina da Silva; Lucas Moraes Berneira; Bruna S. Pacheco; Tais Poletti; Dalila Venzke; Kristiane C. Mariotti; Claudio M. P. Pereira

This paper showed an experimental methodology for the extraction and chromatographic analysis of food spices and the possibility of applying them as latent fingermarks developers. This procedure can be successfully applied in undergraduate chemistry classes.

http://dx.doi.org/10.21577/0100-4042.20170405

Publicado online: agosto 30, 2019
PDF Informação suplementar

STUDENTS BUILDING DIDACTIC EXPERIMENTS AS A TOOL FOR TEACHING UNIT OPERATIONS AND PROCESS CONTROL FOR CHEMISTRY TECHNICIANS

Rodrigo Battisti; Graziele V. B. Possenti; Ana Paula Figueiredo; Marcelo Dal Bó

Heat exchanger; Adsorption; Humidification; Drying; Planning; Building; Experiment.

http://dx.doi.org/10.21577/0100-4042.20170403

Publicado online: agosto 30, 2019
PDF

PROPOSIÇÕES DIDÁTICAS PARA O FORMADOR QUÍMICO: A IMPORTÂNCIA DO TRIPLETE QUÍMICO, DA LINGUAGEM E DA EXPERIMENTAÇÃO INVESTIGATIVA NA FORMAÇÃO DOCENTE EM QUÍMICA

Roseli P. Schnetzler; Thiago Antunes-Souza

Pedagogical Practices based on: i) the articulation of the three levels of chemical knowledge, ii) the importance of verbal language in chemistry teaching-learning processes and iii) the role of investigative experiments for exploring students' ideas.

http://dx.doi.org/10.21577/0100-4042.20170401

Publicado online: agosto 30, 2019
PDF

O DESAFIO NA ESCOLHA DOS SOLVENTES EM SÍNTESE - O WORKUP COMO EXEMPLO

José Ricardo M. Pinto; Maria Gabriela T. C. Ribeiro; Adélio A. S. C. Machado

Assessing the substitution of solvents in synthesis with respect to the their intrinsic greenness and their influence on the chemical reaction greenness.

http://dx.doi.org/10.21577/0100-4042.20170400

Publicado online: agosto 26, 2019
PDF Informação suplementar

EL DOPAJE DEPORTIVO COMO CUESTIÓN SOCIALMENTE VIVA: UNA REVISIÓN BIBLIOGRÁFICA

Yair Alexander Porras-Contreras; Juan Antonio Torres-Aranguren

The aim of this study is to analyze the concept of Sports Doping in a sample of scientific journals, published during the period 2008-2018, in order to recognize its scope in the educational field.

http://dx.doi.org/10.21577/0100-4042.20170398

Publicado online: agosto 26, 2019
PDF

REVISITING THE NUCLEOPHILICITY CONCEPT IN A COMPREHENSIVE BIOMASS VALORIZATION EXPERIMENT: FROM PAPAYA SEEDS TO THIOUREA MOTIFS

Raquel V. dos Santos; Gil M. Viana; Anderson Felipe S. Moreira; Vitor S. Nóbrega; Vitor A. S. da Silva; Luiz Fernando B. Malta; Lucia C. S. Aguiar; Jaqueline D. Senra

The use of raw material from papaya seeds was introduced as a strategy to attract the students' attention towards the biomass valorization while acquiring knowledge in research skills in the context of nucleophilic addition reactions.

http://dx.doi.org/10.21577/0100-4042.20170395

Publicado online: agosto 7, 2019
PDF Informação suplementar

CAMBIO EN LOS MODELOS CONCEPTUALES ESCOLARES SOBRE LA INTERACCIÓN MATERIA Y ENERGÍA EN UN ENTORNO CIENCIA TECNOLOGÍA SOCIEDAD Y AMBIENTE

John J. Bermúdez Loaiza; Francisco J. Ruiz Ortega; Milton Rosero-Moreano

The matter and energy interaction, used as didactic mediation in the high school learning could promote the better acquisition level of knowledge among the students by facilitating the spectroscopy understanding within a Science, Technology, Environment and Society pedagogical framework.

http://dx.doi.org/10.21577/0100-4042.20170394

Publicado online: agosto 7, 2019
PDF

On-line version ISSN 1678-7064 Printed version ISSN 0100-4042
Química Nova
Publicações da Sociedade Brasileira de Química
Caixa Postal: 26037 05513-970 São Paulo - SP
Tel/Fax: +55.11.3032.2299/+55.11.3814.3602
Free access

GN1