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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. 4, 2019, p. 365-472

 

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 2019, 42(4), 387-396

Monitoramento da composição em ésteres do biodiesel do óleo de amêndoa da macaúba (Acrocomia aculeata (Jacq.) Lodd. ex Mart.) em contato direto com o aço carbono e o aço carbono galvanizado

Cláudia Eliane Dias BatistaI; José Domingos FabrisI,II,*; Luis Carlos Duarte CavalcanteIII; Vanny P. FerrazII; Benedito C. Andrade JuniorIV; José Domingos ArdissonV; Leandro R. de LemosVI; Sandra M. DamascenoI

Monitoring the composition in esters of the biodiesel prepared from the macaúba (Acrocomia aculeata (Jacq.) Lodd. ex Mart.) kernel oil put in direct contact with carbon steel and galvanized carbon steel.

http://dx.doi.org/10.21577/0100-4042.20170356

Publicado online: abril 17, 2019
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Artigos Quim. Nova 2019, 42(4), 365-370

 

Preparation and characterization of a quercetin-tetraethyl ether-based photoprotective nanoemulsion

Marlucy da Cruz GonçalvesI; Viviane Martins R. dos SantosI,*; Jason Guy TaylorI; Fernanda Barçante PerasoliII; Orlando David H. dos SantosII; Ana Carolina S. RabeloIII; Joamyr Victor Rossoni JuniorIII; Daniela Caldeira CostaIII; Thiago CazatiIV


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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Quim. Nova 2019, 42(4), 371-378

 

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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Quim. Nova 2019, 42(4), 379-386

 

Evaluation of cocaine samples seized in the streets of the state of Rio de Janeiro, Brazil

Luiza D. Sant'AnaI,II,*; Valeria C. de SousaII; Frances R. dos SantosII; Bruno D. SabinoI,III; Amadeu CardosoIII; Marco Edilson F. de LimaII; Rosane N. CastroII


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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Quim. Nova 2019, 42(4), 397-404

 

Characterization of several generations of NiMo hydroprocessing catalysts employed in the same hydrotreater

Tatiana Marques Pessanha; Carolina Leao 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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Quim. Nova 2019, 42(4), 405-411

 

Caracterização química e avaliação da citotoxicidade de um heteropolissacarídeo isolado da biomassa do Colletotrichum gloeosporioides

Samara M. A. AlexandreI; Maria de Lourdes Corradi da SilvaI,*; Ana F. D. VasconcelosI; Dalita G. S. M. CavalcanteII; Aldo E. JobII; Luciana G. FerreiraIII; Miguel D. NosedaIII; Maria E. R. DuarteIII


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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Quim. Nova 2019, 42(4), 412-417

 

1H NMR study of the host-guest chemistry in a supramolecular helicate FeII2L3 solution

Peng Jiang; Wen-Yuan Wu*; Tie-Huan Tang; Zhi-Fan Chen; Yun-Cong Fang; Rong Wan#


A novel supramolecular helicate [FeII2L3]4+ from subcomponent self-assembly is subject to bind electron-rich aromatic pyrene guests via aromatic π–π interactions.

http://dx.doi.org/10.21577/0100-4042.20170355

Publicado online: abril 17, 2019
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Quim. Nova 2019, 42(4), 418-424

 

Removal of BPA from landfill leachates using fenton-adsorption process

Liliana San Pedro-CedilloI,*; Roger I. Méndez-NoveloI; Emanuel Hernández-NúñezII; Germán Giácoman-VallejosI; A. BassamI


Effective use of the Fenton-adsorption process to degrade the BPA molecule in landfill leachates.

http://dx.doi.org/10.21577/0100-4042.20170354

Publicado online: abril 15, 2019
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Revisao Quim. Nova 2019, 42(4), 425-446

 

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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Nota Técnica Quim. Nova 2019, 42(4), 447-452

 

Development of an automated method to perform a quantitative study of particle size distribution and the effect of a conductive layer in scanning electron microscopy

Juan C. G. Barreto; Diego L. Tita; Marcelo O. Orlandi*


The figure shows the automatized method to determine the PSD of nanosphere by SEM. The results show that the method was well succeeded. In addition, Au and C deposition produce a thinner layer that affect the morphology, thus influenced the particle size.

http://dx.doi.org/10.21577/0100-4042.20170353

Publicado online: abril 8, 2019
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Educaçao Quim. Nova 2019, 42(4), 453-457

 

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 AgostinhoI,*; Ruth Flavia Vera Villamil JaimesII; Lucas VairoletteIII; Isis Valença de SouzaIII


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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Quim. Nova 2019, 42(4), 458-467

 

Autoria coletiva em ambiente informatizado no ensino superior de química

Erasmo Moises dos Santos Silva; Mikeas Silva de Lima; Salete Linhares Queiroz*


Authorship in a virtual learning environment with the participation of undergraduate chemistry students.

http://dx.doi.org/10.21577/0100-4042.20170352

Publicado online: abril 3, 2019
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Assuntos Gerais Quim. Nova 2019, 42(4), 468-472

 

AITP 2019 - ano internacional da tabela periódica dos elementos químicos

Henrique E. Toma


By showing the real elements in the Periodic Table, one can better envision their identities and characteristics, inviting us to access this wonderful Chemistry Portal.

http://dx.doi.org/10.21577/0100-4042.20170350

Publicado online: março 28, 2019
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On-line version ISSN 1678-7064 Printed version ISSN 0100-4042
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