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10:50, seg nov 4

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EDIÇÃO ATUAL vol. 44, No. 6, 2021



Artigo de Capa
Quim. Nova 2021, 44(6), 717-736

Nanofibras eletrofiadas e suas aplicações: avanços na última década

Luiza A. MercanteI,*; Rafaela S. AndreII; Juliana B. MacedoIII; Adriana PavinattoIII; Daniel S. CorreaII

This review provides a recent and comprehensive survey on the electrospinning technique and the most representative applications of electrospun nanofibers.

http://dx.doi.org/10.21577/0100-4042.20170721

Publicado online: fevereiro 18, 2021
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Total access: 1699

Artigo de Contra Capa
Quim. Nova 2021, 44(6), 689-695

Solventes eutéticos naturais profundos (NADES) no preparo de amostras de rocha fosfática e suplemento mineral para determinação elementar por técnicas de plasma

Ana P. R. SantanaI; Daniel F. AndradeII; Taciana G. S. GuimarãesI; Clarice D. B. AmaralIII; Andrea OliveiraIII,*; Ana R. A. NogueiraIV; Mario H. GonzalezI

Two different natural deep eutectic solvents (NADES) were synthesized. They were then used as solvent in ultrasound-assisted extraction (UAE) and heating bath extraction of rock phosphate and mineral supplement samples before elemental analysis by ICP OES and ICP-MS.

http://dx.doi.org/10.21577/0100-4042.20170723

Publicado online: fevereiro 24, 2021
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Total access: 1282

Artigo Quim. Nova 2021, 44(6), 675-682

 

Polyamide 11 porous films by NIPS: the influence of miscibility and polymer crystalline formation in pores structure and morphology

Rayanne Penha Wandenkolken Lima*; Thieres Magaive Costa Pereira; Eloi Alves da Silva Filho


Non-Solvent Induced Phase Separation (NIPS): The demixing of solvent and non-solvent during bath coagulation and polymer precipitation to form membrane structure.

http://dx.doi.org/10.21577/0100-4042.20170725

Publicado online: fevereiro 24, 2021
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Total access: 925

Quim. Nova 2021, 44(6), 683-688

 

Quim. Nova 2021, 44(6), 696-699

 

Isolation and characterization of sesquiterpene lactones from Calea uniflora Less. and their leishmanicidal and trypanocidal activities

Tamires C. LimaI,*; Rafaela J. SouzaII; Milene H. MoraesIII; Saulo S. MatosI; Fernando H. O. AlmeidaI; Mário SteindelIII; Maique W. BiavattiII


http://dx.doi.org/10.21577/0100-4042.20170728

Publicado online: fevereiro 26, 2021
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Total access: 833

Quim. Nova 2021, 44(6), 700-708

 

In vitro metabolism of copalic and kaurenoic acids in rat and human liver microsomes

Mariana MauroI; Rodrigo Moreira da SilvaII; Michel Leandro de CamposIII; Anelize BauermeisterII; Norberto Peporine LopesII; Natalia Valadares de MoraesI,*


In vitro metabolism of the diterpenes copalic and kaurenoic acids of Copaifera sp in rat and human liver microsomes. The kinetic parameters and metabolites described here might support drug development and the traditional use.

http://dx.doi.org/10.21577/0100-4042.20170724

Publicado online: fevereiro 24, 2021
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Total access: 641

Revisão Quim. Nova 2021, 44(6), 709-716

 

Gênero Cryptostegia: fitoquímica, atividades biológicas e aplicações industriais

Selene M. de Morais*; Hamanda B. Pinheiro; José V. Rebouças-Filho; Gessica S. Cavalcante; Oriel H. Bonilla


http://dx.doi.org/10.21577/0100-4042.20170716

Publicado online: fevereiro 18, 2021
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Total access: 1638

Quim. Nova 2021, 44(6), 737-754

 

Avaliação da concentração e composição inorgânica do material particulado coletado no estado do Rio de Janeiro

Karmel BeringuiI; Maria Fernanda C. QuijanoI; Elizanne P. S. JustoI; Luciana Maria Baptista VenturaI,II; Adriana GiodaI,*


http://dx.doi.org/10.21577/0100-4042.20170717

Publicado online: fevereiro 18, 2021
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Total access: 1199

Nota Técnica Quim. Nova 2021, 44(6), 755-759

 

Desenvolvimento de software e interface para o controle por retroalimentação atrasada em sistemas eletroquímicos

Eduardo ParmaI; Laura MenezesI; Sidnei A. BaldinII; Raphael NagaoI,III,*


A potentiostat is connected to both the Cu/Sn electrodeposition system and a computer. The electrochemical oscillations can be seen on the latter. The delayed feedback control equation is presented upon it, indicating the control application.

http://dx.doi.org/10.21577/0100-4042.20170711

Publicado online: fevereiro 3, 2021
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Total access: 883

Quim. Nova 2021, 44(6), 760-765

 

Analytical method validation for the identification and quantification of dissolved gold and gold nanoparticles in cosmetics products by single particle inductively coupled plasma mass spectrometry

Lisia M. G. dos SantosI,*; Cristiane Barata-SilvaI; Santos A. Vicentini NetoI; Mayssa A. FonsecaI; Carolina D. MagalhãesI; Josino.C. MoreiraII; Silvana C. JacobI


Analytical method validation for the identification and quantification of dissolved gold and gold nanoparticles in cosmetics products by single particle inductively coupled plasma mass spectrometry.

http://dx.doi.org/10.21577/0100-4042.20170712

Publicado online: fevereiro 3, 2021
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Total access: 730

Educação Quim. Nova 2021, 44(6), 766-772

 

Dificuldades de ingressantes de um curso de licenciatura em química sobre conceitos da eletroquímica: um desafio para o ensino superior

Gabriela Venturi; Ermelinda Silvana Junckes; Maria da Graça Moraes Braga Martin; Brenno Ralf Maciel Oliveira*


The graphical abstract represents the difficulties and misconceptions that chemistry undergraduates have with electrochemistry and possible challenge for higher education.

http://dx.doi.org/10.21577/0100-4042.20170756

Publicado online: abril 22, 2021
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Total access: 808

Quim. Nova 2021, 44(6), 773-782

 

Dificuldades no ensino e na aprendizagem de química orgânica do ensino superior - estudo de caso em duas Universidades Federais

Natália Bozzetto Alves*; Fábio André Sangiogo; Bruno dos Santos Pastoriza


This research reports difficulties in teaching and learning organic chemistry in undergraduate Chemistry courses in two Federal Universities in Brazil.

http://dx.doi.org/10.21577/0100-4042.20170708

Publicado online: janeiro 22, 2021
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Total access: 1781

Quim. Nova 2021, 44(6), 783-791

 

Cálculo e preparo de soluções tampão: guia completo usando o software PeakMaster®

Olívia Brito de Oliveira Moreira; Larissa dos Anjos Castro; Marcone Augusto Leal de Oliveira*


Buffers are an important and widely used resource to keep unchanged the pH of solutions. In this work we offer a practical guide on how to calculate all the parameters required to prepare a buffer solution in addition to help anyone who searches for knowledge about this issue.

http://dx.doi.org/10.21577/0100-4042.20170702

Publicado online: janeiro 20, 2021
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Total access: 2419

Assuntos Gerais Quim. Nova 2021, 44(6), 792-796

 

ISO/IEC 17025: history and introduction of concepts

Anna Luísa Ribeiro Miguel*; Renata Pereira Lopes Moreiraa and André Fernando de Oliveira


In a complex market, assuring the quality of a service is strategic. For testing and calibration laboratories, the ISO/IEC 17025 proposes a Quality Management System (QMS) that supports this strategy, since it promotes the generation of traceable and reliable results.

http://dx.doi.org/10.21577/0100-4042.20170726

Publicado online: fevereiro 24, 2021
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Total access: 1070

On-line version ISSN 1678-7064 Printed version ISSN 0100-4042
Química Nova
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