JBCS



9:30, qui nov 15








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.

Edição Atual vol. 41, No. 10, 2018, p. 1095-1236

 

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 2018, 41(10), 1226-1236

Eixos mobilizadores em química: um breve olhar quinze anos depois

Lilian Lefol Nani GuarieiroI,II; Pedro Afonso de Paula PereiraII,III; Paulo Cezar VieiraIV; Norberto Peporine LopesIV; Jailson B. de AndradeI,II,*

The current moment brings challenges, imposed by a new technological generation (Industry 4.0), the transformations of the urban societies (Society 5.0) and by the commitment with the Sustainable Development Objectives, SDG.

http://dx.doi.org/10.21577/0100-4042.20170296

Publicado online: outubro 4, 2018
PDF
Artigos Quim. Nova 2018, 41(10), 1095-1100

 

Determinação de potássio em rochas silicáticas por espectrometria de emissão atômica com chama após dissolução assistida por ultrassom

Daiane L. BaldezI,II; Liziane O. AvilaI; Daiane P. TorresI; Rosane MartinazzoII; Carlos A. P. SilveiraII; Mariana A. VieiraI,*


This paper presents a simple method for the determination of K in silicate rocks by flame atomic emission spectrometry.

http://dx.doi.org/10.21577/0100-4042.20170290

Publicado online: setembro 19, 2018
PDF Informação suplementar
Quim. Nova 2018, 41(10), 1101-1108

 

Síntese de Nb2O5, Al2O3 e Nb2O5/Al2O3 via método de pechini como pré-tratamento alternativo para esquemas de pintura do aço carbono aisi 1005

Yuri H. P. CaféI; Elber V. BendinelliII; Cristina C. AmorimII; Alberto P. OrdineII; Eliane D'EliaI; Emerson S. RibeiroI,*


Nb2O5 (NbPC), Al2O3 (AlPC) and Nb2O5/Al2O3 (NbAlPC) as alternative pretreatment for carbon steel AISI 1005 coating systems and subsequent analysis by Electrochemical Impedance.

http://dx.doi.org/10.21577/0100-4042.20170286

Publicado online: setembro 13, 2018
PDF
Quim. Nova 2018, 41(10), 1109-1116

 

Influence of low and high glycerol concentrations on wettability and flexibility of chitosan biofilms

Erveton P. PintoI,#,‡; Walter de S. TavaresII; Robert S. MatosI,#; Adriana M. FerreiraII; Rodrigo P. MenezesIII; Marcelo Eduardo H. M. da CostaIII; Tiago M. de SouzaIV; Irlon M. FerreiraI,§,*; Franscisco Fábio O. de SousaII; Robert Ronald M. ZamoraI


Biofilms prepared by the casting technique (CH, CHG1 and CHG2); measurement of hardness and elastic modulus by linear regression of the contact angle to assess glycerol influence over the wettability and flexibility of biofilms.

http://dx.doi.org/10.21577/0100-4042.20170287

Publicado online: setembro 18, 2018
PDF
Quim. Nova 2018, 41(10), 1117-1126

 

Placas cerâmicas contendo lodo de eta e cinza de casca de arroz: correlação de suas propriedades físico-químicas com sua microestrutura

Antônio R. PetterleI; Gustavo G. SantiagoI; Wang ChongI; Luciani SomensiII; Sílvia M. TamborimI,III,*


The silica from rice husk ash and the sludge from a water treatment plant when inserted in kaolinite clay provide an increase on vitreous phases as mulite and cristobalite in ceramic plates generating a high mechanical and thermal resistance.

http://dx.doi.org/10.21577/0100-4042.20170288

Publicado online: setembro 18, 2018
PDF
Quim. Nova 2018, 41(10), 1127-1131

 

Hidrólise enzimática, fermentação e produção de biocombustíveis através da coroa de Ananas comosus

Jumelice dos S. SilvaI,#; Valéria R. dos S. MaltaI; Martha S. R. dos Santos-RochaII; Renata M. R. G. AlmeidaII; Márcia A. GomesIII; Cecília D. VicenteIV; Kledson L. BarbosaI,*


Ananas comosus crown was applied for water-based pretreatment at moderate temperatures and enzymatic hydrolysis and fermentation experiments for ethanol and briquettes production.

http://dx.doi.org/10.21577/0100-4042.20170281

Publicado online: agosto 29, 2018
PDF
Quim. Nova 2018, 41(10), 1132-1139

 

Estudo teórico de potenciais agentes para o tratamento da doença de alzheimer derivados da 8-hidroxiquinolina com substituintes do tipo N-acil-hidrazona

Talis U. da SilvaI; Leonardo Viana de FreitasII; Nicolás A. ReyIII; Sérgio de Paula MachadoI,*


Formation shceme of Zn(II) complexes with 8-HQ derivatives with substituents N-acyl-hidrazone type substituents and two chloros

http://dx.doi.org/10.21577/0100-4042.20170283

Publicado online: setembro 4, 2018
PDF Informação suplementar
Quim. Nova 2018, 41(10), 1140-1149

 

Polyphenol and triterpenoid constituents of Eugenia florida DC. (myrtaceae) leaves and their antioxidant and cytotoxic potential

Priscila F. P. SantosI,II; Luiz N. L. F. GomesII; José L. MazzeiIII; Ana Paula A. FontãoIII; André L. F. SampaioIII; Antonio C. SianiIII,# Ligia M. M. ValenteII,*


Twenty-nine compounds were revealed by GC-MS and UFLC-DAD-MS/MS in the leaves of Eugenia florida as well as their antioxidant and cytotoxic activities.

http://dx.doi.org/10.21577/0100-4042.20170284

Publicado online: setembro 11, 2018
PDF Informação suplementar
Quim. Nova 2018, 41(10), 1150-1155

 

Síntese, caracterização e avaliação da atividade citotóxica de compostos ciclopaladados contendo como ligantes benzaldeidoxima ortometalada e etilenotiouréia

Nathália A. ThomazellaI; Sahra C. LemosI; Ronan F. F. de SouzaI; Rodrigo A. de SouzaI; Antonio E. MauroI; Iracilda Z. CarlosII; Adelino V. G. NettoI,*


The halide-bridge cleavage reaction of the [Pd(C2,N-bzox)(µ-Cl)]2 compound with ethylenethiourea (L) in the 1:2 molar ratio yielded the cyclopalladated compound [Pd(C2,N-bzox)(X)(L)] {X = Cl- (1); Br- (2), I- (3)}.

http://dx.doi.org/10.21577/0100-4042.20170293

Publicado online: setembro 25, 2018
PDF
Quim. Nova 2018, 41(10), 1156-1161

 

Effect of calcination temperature on the structure and catalytic performance of the Cu-MCM-41 catalysts for the synthesis of dimethyl carbonate

Yongjie DingI,II; Chunxiang ZhaoI,*; Yunlin LiI; Zheng MaI; Xuelin LvI


At the calcination temperature 550 °C, the Cu-MCM-41 catalyst exhibited excellent activity and stability for the DMC synthesis.

http://dx.doi.org/10.21577/0100-4042.20170291

Publicado online: setembro 24, 2018
PDF
Quim. Nova 2018, 41(10), 1162-1166

 

Produção de material de referência certificado de óxido de hólmio(III) em ampolas

Debora E. F. GonçalvesI; Ana P. D. AlvarengaII; Paulo P. BorgesIII,*; Juliana F. S. GomesII; Thiago O. AraujoIII


Steps for development of certified reference material (CRM), and the peaks of maximum absorbance of the CRM of holmium oxide solution developed for calibration of spectrophotometers.

http://dx.doi.org/10.21577/0100-4042.20170292

Publicado online: setembro 24, 2018
PDF
Revisão Quim. Nova 2018, 41(10), 1167-1177

 

Avanços químicos no planejamento e desenvolvimento de derivados do paracetamol

Rosivaldo S. BorgesI,II,*; Ana Carolina S. P. S. JesusI; Laice F. CardosoI; Clícia L. NeriI; Roberto B. MoraisII,#; Valéria A. BarrosII; Albérico B. F. da SilvaIII


Acetaminophen or paracetamol is a simplified chemical structure of aniline derivatives and it is used as analgesic agent. Several modifications in its structure particularly on electronic and solubility parameters were performed, seeking the development of safer derivatives.

http://dx.doi.org/10.21577/0100-4042.20170282

Publicado online: setembro 3, 2018
PDF
Quim. Nova 2018, 41(10), 1178-1191

 

MOFs (Metal-Organic Frameworks): uma fascinante classe de materiais inorgânicos porosos

Regina C. G. Frem*; Guilherme Arroyos; Jader B. da Silva Flor; Renata C. Alves; Guilherme N. Lucena; Caroline M. da Silva; Mariana F. Coura


Metal-Organic Frameworks (MOFs) are a class of porous inorganic solids, in a borderline area between coordination chemistry and material science. Recent research progress in synthesis and potential environmental applications are discussed in this paper.

http://dx.doi.org/10.21577/0100-4042.20170285

Publicado online: setembro 11, 2018
PDF
Nota Técnica Quim. Nova 2018, 41(10), 1192-1195

 

Straightforward, economical procedures for microscale ellman's test for cholinesterase inhibition and reactivation

Samir F. de A. CavalcanteI,II,#; Daniel A. S. KitagawaI; Rafael B. RodriguesI; Monique CardozoI; Reuel L. de PaulaI; Ana Beatriz de A. CorreaI; Alessandro B. C. SimasII,*


Based on spectrophotometry, Ellman's assay correlates activity of cholinesterases with Beer's Law. In absence of an organophosphorus inhibitor, formation of thiol chromophore leads to higher absorbance, which means high activity.

http://dx.doi.org/10.21577/0100-4042.20170278

Publicado online: agosto 22, 2018
PDF
Quim. Nova 2018, 41(10), 1196-1199

 

Construção de uma bomba peristáltica e de um sistema de detecção utilizando um hardware de código fonte aberto "arduino" para análise em fluxo

Fernanda S. C. SoaresI; Alan L. VieiraII; Márcio S. SoaresI; Marcus V. Sant'AnnaI; Rejane NascentesI; Carla M. BossuI,*


Low-cost flow analysis system: the peristaltic pump and the photometer developed in this work allow the implementation of practical disciplines, such as molecular absorption spectrophotometry and flow analysis system in undergraduate chemistry courses.

http://dx.doi.org/10.21577/0100-4042.20170289

Publicado online: setembro 18, 2018
PDF
Educação Quim. Nova 2018, 41(10), 1200-1204

 

Biofuels from coconut fat and soybean oil: microwave-assisted synthesis and gas chromatography/mass spectrometry analysis

Amanda C. PinheiroI; André B. GonçalvesI; Wilhelm J. BaaderI; Lydia F. YamaguchiI; Naved I. MalekII; Erick L. BastosI; Omar A. El SeoudI,*


Methods for biofuel analysis, a topic with relevant socio-economic impact were discussed and compared to help students to gain insight into transesterification mechanism, an important example of acyl-transfer reactions.

http://dx.doi.org/10.21577/0100-4042.20170273

Publicado online: agosto 21, 2018
PDF
Quim. Nova 2018, 41(10), 1205-1208

 

Microwave-assisted synthesis and pka determination of umbelliferone: an experiment for the undergraduate organic chemistry laboratory

Thiago M. PereiraI; Daiana F. P. FrancoI; Felipe VitórioI; Ronaldo C. AmaralII; Aparecida C. PonzoniI ;Arthur E. KümmerleI,*


Microwave-assisted synthesis of umbelliferone (7-OH-coumarin) carried out in a domestic microwave oven. Observation of its fluorescence and deprotonation in basic conditions under UV-365 nm lamp.

http://dx.doi.org/10.21577/0100-4042.20170262

Publicado online: julho 23, 2018
PDF Informação suplementar
Quim. Nova 2018, 41(10), 1209-1217

 

O tema carboidratos através da metodologia de estudos de caso: desenvolvimento de conteúdos conceituais, procedimentais e atitudinais

Kamila dos PassosI; Leandra F. CampoI; Daniele P. DanielII; Franciane S. C. de LimaII; Camila G. PassosII,*


The use of case resolution on the reduction of sugar content in processed natural juices for the training of future professionals of Chemistry.

http://dx.doi.org/10.21577/0100-4042.20170263

Publicado online: julho 23, 2018
PDF Informação suplementar
Quim. Nova 2018, 41(10), 1218-1225

 

Determinação de cádmio em bijuterias oriundas da china

Ariane R. PaisI; Larissa N. DinaI; Evandro R. AlvesII; Hélen C. de RezendeIII; Luís A. da SilvaI; Valéria A. AlvesI,*


This study aimed to identify cadmium in low-cost jewelry from China. In the qualitative test, sulfide was used as precipitating agent. Quantification of Cd2+ was performed by atomic absorption spectrometry. The content of Cd was ~ 30% (w/w) in one of the investigated pieces.

http://dx.doi.org/10.21577/0100-4042.20170276

Publicado online: agosto 21, 2018
PDF Informação suplementar

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