JBCS



4:07, ter fev 18

Acesso Aberto/TP



vol. 43, No. 8, 2020



Artigo de Capa
Quim. Nova 2020, 43(8), 1125-1137

Técnicas avançadas para a diferenciação de isômeros por espectrometria de massas

Tatiana C. Penna; Thiago C. Correra*

Most methods for isomer differentiation by mass spectrometry rely on differential fragmentation patterns. Selective activation methods have been proved to be a powerful alternative, giving rise to advanced ion spectroscopy and other techniques that will be discussed.

http://dx.doi.org/10.21577/0100-4042.20170582

Publicado online: junho 30, 2020
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Artigo Quim. Nova 2020, 43(8), 1011-1016

 

Binary micelles (E45S8/F127) for quercetin and griseofulvin solubilisation

Karen P. S. LopesI; Igor M. CavalcanteI; Raquel F. da SilvaI; Débora H. A. de BritoI; Lillian M. U. D. FechineI; Denise R. MoreiraI; Ícaro G. P. VieiraII; Francisco Vinícius Clemente S. AzulIII; Luzia K. A. M. LealIII; Maria E. N. P. RibeiroI,*; Nágila M. P. S. RicardoI,#


Binary micelles may improve the bioavailability of poorly soluble drugs.

http://dx.doi.org/10.21577/0100-4042.20170570

Publicado online: junho 18, 2020
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Quim. Nova 2020, 43(8), 1017-1025

 

Synthesis of materials produced from spent batteries with environmental application

Mayra Aparecida NascimentoI; Jean Castro da CruzI; Marina Ferreira dos ReisI; Carolina Teixeira Costa AlpinoI; Cristiana Resende MarceloII; Guilherme Dias RodriguesIII; André Fernando de OliveiraI; Renata Pereira LopesI,*


Alkaline and nickel-metal hydride spent batteries were leached separately. The metal ions present in the leachate were reduced to obtain polymetallic materials from different components, which were applied to remove the reactive blue 4 textile dye.

http://dx.doi.org/10.21577/0100-4042.20170578

Publicado online: junho 30, 2020
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Quim. Nova 2020, 43(8), 1026-1034

 

Determination of the pesticides in water used in the culture and processing of potatoes

Patrícia H. RibeiroI; Lêda R. A. FaroniI,*; Fernanda F. HelenoII; Maria E. L. R. de QueirozIII; Lucas H. F. PratesI


A vortex-assisted liquid-liquid microextraction method followed by gas chromatography coupled to mass spectrometry for the determination of anilazine, linuron, prothiofos, and tebuconazole residues in water from the culture and processing of potatoes was optimized.

http://dx.doi.org/10.21577/0100-4042.20170577

Publicado online: junho 24, 2020
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Quim. Nova 2020, 43(8), 1035-1042

 

Fase sensora de poli(cloreto de vinila) na detecção de 17β-estradiol em meio aquoso utilizando espectroscopia no infravermelho médio e quimiometria

Tamires da Silva LimaI; Gabriel Bercley de Lima VitorinoI; Elaine Cristina Lima do NascimentoI; Carlos André de SouzaI; Daniel Lucas Dantas de FreitasII; Kássio Michell Gomes de LimaII; Andréa Monteiro Santana Silva BritoI,*


We achieved it through a PVC sensing phase with detection in the infrared and SIMCA classification, with an accuracy of 80%, aqueous that were not contaminated by 17β-estradiol, demonstrated a possible viability of the proposed screening method.

http://dx.doi.org/10.21577/0100-4042.20170593

Publicado online: julho 15, 2020
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Quim. Nova 2020, 43(8), 1043-1047

 

Insight into the effects of bay-substituents on stable perylene diimide radical anion salts

Yuzhen ZhaoI,*; Yang ZhaoI; Zhun GuoI; Xiaoxi KangI; Zongcheng MiaoI; Haiquan ZhangII


Perylene diimide with electron-donating groups at bay position has high formation rate of radical anon salt and high optical sensitivity to Cu2+ compared with that of the perylene diimide with electron-withdrawing groups.

http://dx.doi.org/10.21577/0100-4042.20170579

Publicado online: junho 30, 2020
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Quim. Nova 2020, 43(8), 1048-1057

 

HPLC method improvement for 4-nonylphenol determination in anaerobic reactors: decreasing solvent consumption and waste generation

Henrique S. DornellesI,*; Fabrício MotteranII; Isabel K. SakamotoI; Maria A. T. AdornoI; Maria Bernadete A. VarescheI


The graphical abstract shows the analysis procedure in anaerobic reactors, with sample pre-treatment using Solid Phase Extraction cartridges (SPE) and subsequent determination in High Performance Liquid Chromatography (HPLC).

http://dx.doi.org/10.21577/0100-4042.20170590

Publicado online: julho 15, 2020
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Quim. Nova 2020, 43(8), 1058-1065

 

Mecanismo de evolução de hidrogênio durante a corrosão da liga 2198-t8 em meio contendo cloreto: uma abordagem eletroquímica

João Victor de Sousa Araujo*; Rejane Maria Pereira da Silva; Mariana Xavier Milagre; Caruline de Souza Carvalho Machado; Isolda Costa


Corrosion mechanism of the 2198-T8 Al-Cu-Li alloy immersed in an aggressive environment.

http://dx.doi.org/10.21577/0100-4042.20170598

Publicado online: julho 24, 2020
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Quim. Nova 2020, 43(8), 1066-1073

 

Constituents from roots of maytenus distichophylla, antimicrobial activity and toxicity for cells and caenorhabditis elegans

Shirley A. T. MoralesI; Mariana G. de AguilarI; Rafael C. G. PereiraI; Lucienir P. DuarteI,*; Grasiely F. SousaI; Djalma M. de OliveiraII; Fernanda C. G. EvangelistaIII; Adriano P. SabinoIII; Roberta O. VianaIV; Viviane S. AlvesIV and Sidney A. Vieira-FilhoV


Extracts and compounds from Maytenus distichophylla roots were submitted to biological tests. All samples reduced the viability of S. aureus. Three compounds showed potential cytotoxic activity and selectivity against THP-1 and K562 leukemic cells and low toxicity to PBMC cells.

http://dx.doi.org/10.21577/0100-4042.20170591

Publicado online: julho 15, 2020
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Total access: 1028

Quim. Nova 2020, 43(8), 1074-1077

 

Determination of four arsenic species in algae by high-performance liquid chromatography coupled with hydride generation atomic fluorescence spectrometry

Sun PengI,II,*; Gao YulingI,II; Zhang XiaolinIII; Yan RuiaII


The algae samples were extracted by dilute nitric acid, As (Ⅲ), DMA, MMA, As (Ⅴ) in extracting solution were separated by HPLC. The four arsenic species were subjected to potassium borohydride hydrolysis to produce gaseous arsenic compounds that were measured by AFS.

http://dx.doi.org/10.21577/0100-4042.20170574

Publicado online: junho 23, 2020
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Total access: 841

Quim. Nova 2020, 43(8), 1078-1085

 

Remediación electrocinética de un suelo real contaminado con plomo asistida con la adición de un agente complejante

Maria Villen-Guzman*; Maria del Mar Cerrillo-Gonzalez; Juan M. Paz-Garcia; Carlos Vereda-Alonso; Cesar Gomez-Lahoz; Jose M. Rodriguez-Maroto


In this study, EDTA enhanced electrokinetic experiments were designed to remediate a real soil contaminated with Pb.

http://dx.doi.org/10.21577/0100-4042.20170585

Publicado online: julho 8, 2020
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Total access: 1007

Revisão Quim. Nova 2020, 43(8), 1086-1103

 

Avaliação de nanotubos de carbono funcionalizados visando o desenvolvimento de métodos de pré-concentração de íons metálicos e determinação por técnicas espectrométricas e eletroanalíticas

Marcela Z. CorazzaI; Paula Mantovani dos SantosI,II; Mariana Gava SegatelliII; Arnaldo César PereiraIII; César R. T. TarleyII,IV,*


Different applications of carbon nanotubes modified by means of chemical and/or physical functionalization for metal ions preconcentration with spectroanalytical and electroanalytical determination are discussed in this review.

http://dx.doi.org/10.21577/0100-4042.20170583

Publicado online: junho 30, 2020
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Quim. Nova 2020, 43(8), 1104-1124

 

Compostos quimioterápicos de ouro: uma visão geral dos complexos anticâncer de Au(I/III) em relação à estrutura do ligante

Giset Y. Sánchez Delgado*; Camila A. S. R. Condé; Hélio F. Dos Santos; Maribel Navarro#


Au(III)-containing multidentate ligands and Au(I)-PR3/NHCs complexes have excellent antitumor properties. Their ability to inhibit several therapeutic targets, in particular, enzymes containing thiols, positions them as promising anticancer candidates.

http://dx.doi.org/10.21577/0100-4042.20170566

Publicado online: junho 10, 2020
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Total access: 1962

Nota Técnica Quim. Nova 2020, 43(8), 1138-1144

 

Comparação de métodos para determinação de substâncias húmicas em fertilizantes líquidos comerciais

Casiano A. DheinI; Deborah P. DickI,*; Andressa C. BenderII


Quantification of humic substances in liquid fertilizers based on the chemical oxidation of C overestimated fulvic acids content. The most reliable results were obtained from the gravimetric determination of purified fulvic and humic acids.

http://dx.doi.org/10.21577/0100-4042.20170564

Publicado online: junho 10, 2020
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Total access: 859

Educação Quim. Nova 2020, 43(8), 1145-1153

 

Análise dos trabalhos apresentados nas sessões coordenadas da área de ensino nas reuniões anuais da sociedade brasileira de química

Camila SilveiraI,*; Andressa de Souza FernandesI; Aline KundlatschII


Quantitative distribution of abstracts presented at the Coordinated Sessions of the teaching area at the Annual Meetings of the Brazilian Chemical Society by Brazilian states.

http://dx.doi.org/10.21577/0100-4042.20170576

Publicado online: junho 24, 2020
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Total access: 787

Quim. Nova 2020, 43(8), 1154-1162

 

Elaboração e uso de animações como estratégia para o ensino de mecanismos das reações orgânicas

Idália Helena S. EstevamI,*; Emmanuelle Ferreira R. SilvaII; Ana Paula dos S. SacramentoI


Sequential images showing the first step of the alcohol dehydratation mechanism - alcohol protonation step.

http://dx.doi.org/10.21577/0100-4042.20170586

Publicado online: julho 8, 2020
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Quim. Nova 2020, 43(8), 1163-1171

 

Estratégias de escrita para abordagem da comunicação pública da ciência na educação em química

Carolina Sotério; Salete Linhares Queiroz*


A five-step course for undergraduate chemistry students who want to communicate science to a broad audience.

http://dx.doi.org/10.21577/0100-4042.20170580

Publicado online: junho 30, 2020
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Quim. Nova 2020, 43(8), 1172-1175

 

Learning about edge effects and ultramicroelectrodes in electrochemistry: synergy between experiments and simulations

Magalí GimenoI,II; Franco Martín ZanottoI,II,III,*


The interplay between cyclic voltammetry experiments and simulations allows a natural comprehension of new concepts. The behavior of ultramicroelectrodes is seamlessly introduced and explained in terms of edge effects and spherical diffusion.

http://dx.doi.org/10.21577/0100-4042.20170587

Publicado online: julho 8, 2020
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Assuntos Gerais Quim. Nova 2020, 43(8), 1176-1189

 

The fundamental importance of basic science: examples of high-impact discoveries from an international chemistry network

Luiz G. F. LopesI,II,*; Peter J. SadlerIII; Vânia Bernardes-GénissonIV,V; José J. G. MouraVI; Remi ChauvinIV,V; Paul V. BernhardtVII; Eduardo H. S. SousaI,II,#


In a series of short stories from an international chemistry network of collaboration, the critical importance of basic science in advancing the well-being of everyone on our Planet is highlighted.

http://dx.doi.org/10.21577/0100-4042.20170584

Publicado online: julho 6, 2020
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Quim. Nova 2020, 43(8), 1190-1203

 

Validation of analytical methods in a pharmaceutical quality system: an overview focused on HPLC methods

Breno M. Marson; Victor Concentino; Allan M. Junkert; Mariana M. Fachi; Raquel O. Vilhena; Roberto Pontarolo*


This review details the analytical method validation parameters considering international and national guidelines.

http://dx.doi.org/10.21577/0100-4042.20170589

Publicado online: julho 8, 2020
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