JBCS



9:46, sex nov 8

Acesso Aberto/TP




EDIÇÃO ATUAL vol. 45, No. 3, 2022



Artigo de Capa
Quim. Nova 2022, 45(3), 304-313

Reações em cascata enzimática, quimioenzimática e fotoenzimática: perspectivas para uma síntese orgânica mais sustentável

Shirley A. Castilho; Humberto M. S. Milagre; Cintia D. F. Milagre*

Pot-economy, step-economy and atom-economy are key issues that can be addressed by enzymatic cascade reactions, an efficient and sustainable approach in synthetic organic chemistry.

http://dx.doi.org/10.21577/0100-4042.20170829

Publicado online: outubro 5, 2021
PDF

Total access: 1129

Artigo de Contra Capa
Quim. Nova 2022, 45(3), 324-334

Álcool em gel para assepsia das mãos - formulação adequada e eficiência garantida em meio à pandemia da COVID-19

Kleber Queiroz FerreiraI; Isabel C. RigoliI; Marcus V. S. da SilvaII; Alexandre de Freitas EspeletaIII; Zênis Novais da RochaI,*

"A good looking" alcohol gel containing ethanol less than 68.25 0INPM may trick the customer. However, it does not trick the coronavirus, with remains active. This is worrying fact amidst COVID-19 crisis.

http://dx.doi.org/10.21577/0100-4042.20170831

Publicado online: outubro 13, 2021
PDF Informação suplementar

Total access: 1686

Artigo Quim. Nova 2022, 45(3), 263-267

 

Separação enantiosseletiva da oxibutinina: uma investigação teórica e experimental

Lilian Christina Zin; Camilla Fonseca Silva; Luciana Guimarães; Keyller Bastos Borges; Clebio Soares Nascimento Jr.


Enantioselective separation of oxybutynin studied by HPLC and DFT calculations.

http://dx.doi.org/10.21577/0100-4042.20170815

Publicado online: agosto 27, 2021
PDF Compartilhar

Total access: 1382

Quim. Nova 2022, 45(3), 268-274

 

Molecular networking-based dereplication of ambuic acid derivatives from the marine fungus Pestalotiopsis sp. 4a11

Luis C. Kellner FilhoI; Rhenner N. A. AssisI; Aline O. dos SantosII; Sabrina K. TarganskiIII; Kátia A. SiqueiraIII; Livia S. de MedeirosIV; Célio F. F. AngoliniV; Felipe M. A. da SilvaII; Marcos A. SoaresIII; Gustavo M. DiasVI; Marcio L. A. SilvaI; Wilson R. CunhaI; Patricia M. PaulettiI; Hector H. F. KoolenII,*; Ana H. JanuarioI,*


The marine fungus Pestalotiopis sp. 4A11, isolated from the ascidian Didemnum perlucidum after cultivation in solid medium, produced ambuic acid and 10 other derivatives, which were dereplicated using LC-MS/MS-based molecular networking.

http://dx.doi.org/10.21577/0100-4042.20170819

Publicado online: setembro 15, 2021
PDF Informação suplementar
Compartilhar

Total access: 1195

Quim. Nova 2022, 45(3), 275-282

 

Theoretical investigation of the effect of conjuation of thiophene rings on the charge transport of thienocoronene derivatives

Ziran ChenI; Yujin ZhangI; Zhanrong HeI; Yuan LiI,*; Meihao XiaII; Wenhao YuII,III,*


Quantum chemical calculations of the charge-transport rates were performed for five derivatives of
1,2,5,6,9,10-hexa(methoxy)coronene with varying numbers of thiophene rings, using different basis sets and hybrid functionals.

http://dx.doi.org/10.21577/0100-4042.20170820

Publicado online: setembro 15, 2021
PDF Informação suplementar
Compartilhar

Total access: 1134

Quim. Nova 2022, 45(3), 283-291

 

Biliary pah metabolites in fish from the highly impacted guanabara bay, in southeastern brazil, determined by fixed and synchronous fluorescence spectroscopy

Marina Moreira FreireI,II; Cristina GómezV; Anabela Sousa OliveiraIII,IV,†; Josino Costa MoreiraI; Ana Rosa Linde AriasI,V,*


The analysis of fish bile extracts for PHA derivatives using fixed and synchronous fluorescence spectroscopy could help determine exposure to contaminated waters.

http://dx.doi.org/10.21577/0100-4042.20170823

Publicado online: setembro 22, 2021
PDF Compartilhar

Total access: 864

Quim. Nova 2022, 45(3), 292-296

 

Formação de azeótropos do ponto de vista da termodinâmica de solvatação

Josefredo R. Pliego Jr.*


The formation of azeotrope is interpreted in terms of the relative solvation free energy in the pure liquid and its diluted solution in the other component.

http://dx.doi.org/10.21577/0100-4042.20170824

Publicado online: setembro 22, 2021
PDF Informação suplementar
Compartilhar

Total access: 832

Quim. Nova 2022, 45(3), 297-303

 

Exemplificando o uso do macro mapeamento elementar por xrf (MA-XRF) na investigação forense de obras de arte

André R. PimentaI; Valter S. FelixI; Daniele M. SilvaI; Marcelo O. PereiraII; Ana L. OliveiraI; Douglas S. FerreiraI; Cristiano S. CarvalhoII; Fabricio L. SilvaII; Elicardo A.S. GonçalvesI; Rafael S. DutraI; Leandro O. PereiraI; Ronaldo V. PereiraI; Renato P. FreitasI,*


The macro multi-element mapping b XRF technique allows performing images about the distribution of elements present in a sample. In artworks, these elemental mappings are related to the pigments present on the canvas. Therefore, images enable the investigation of the creative process of the artworks and also are useful in the forensic study of canvases.

http://dx.doi.org/10.21577/0100-4042.20170826

Publicado online: setembro 29, 2021
PDF Compartilhar

Total access: 1197

Revisão Quim. Nova 2022, 45(3), 314-323

 

Avanços analíticos baseados em modelos de calibração de primeira ordem e espectroscopia UV-VIs para avaliação da qualidade da água: uma revisão - parte 1

Grazielle R. SantosI; Gabriela S. P. PaulinoI; Grazielle P. I. BorgesI; Aníbal F. SantiagoII; Gilmare A. da SilvaIII,*


Use of ultraviolet-visible (UV-Vis) spectrophotometry and calibration methods for determination of water quality parameters.

http://dx.doi.org/10.21577/0100-4042.20170830

Publicado online: outubro 5, 2021
PDF Compartilhar

Total access: 658

Educação Quim. Nova 2022, 45(3), 335-344

 

O químico e o meio ambiente: aspectos históricos e as contribuições do ensino de gestão ambiental

Suellen A. Alves*


Environmental management is essential nowadays for any productive sector. In this sense, teaching environmental management and disciplines that encourage sustainable thinking and clean practices in undergraduate courses in Bachelor of Chemistry is necessary.

http://dx.doi.org/10.21577/0100-4042.20170837

Publicado online: novembro 10, 2021
PDF Informação suplementar
Compartilhar

Total access: 1083

Quim. Nova 2022, 45(3), 345-354

 

Usando analogias para lecionar sobre o átomo nas aulas de quimica geral no ensino superior

José ArãoI,*; Laurinda LeiteII; Emília NhaleviloIII


Analogies are comparisons between two knowledge domains: a familiar domain and an unknown or inaccessible one. They are twofold educational tools as they may help you to think and to visualize scientific entities, like the atom, and may cause unintended understandings.

http://dx.doi.org/10.21577/0100-4042.20170845

Publicado online: novembro 30, 2021
PDF Compartilhar

Total access: 868

Assuntos Gerais Quim. Nova 2022, 45(3), 355-361

 

Análises de amostras ambientais para fins de salvaguardas nucleares no Brasil

Carina C. Lisbôa*; Olívio P. de Oliveira Júnior; Delvonei A. de Andrade


Through a simple kit containing clean swipe cloths, plastic bags, gloves, forms, a pen, labels and a roll of aluminum foil (used to establish a clean working surface) is possible to collect environmental samples in nuclear facilities and obtain essential data for nuclear safeguards.

http://dx.doi.org/10.21577/0100-4042.20170839

Publicado online: novembro 12, 2021
PDF Compartilhar

Total access: 894

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