JBCS



11:05, seg nov 4

Acesso Aberto/TP




EDIÇÃO ATUAL vol. 47, No. 7, 2024



Artigo de Capa
Quim. Nova 2024, 47(7), e-20240025, 1-12

Lipase from Rhizopus oryzae immobilized on corn cob powder: a new approach for dietetic triglyceride synthesis in a fixed bed reactor

Bruna Jeanne Soares PachecoI; Grazielle Santos Silva AndradeI,*; Ariela Veloso de PaulaII

Corn cob powder as a carrier for immobilization by physical adsorption of Rhizopus oryzae lipase used in the acidolysis reaction of grape seed oil with capric acid to synthesize dietary triglycerides MLM-type in a fixed bed reactor.

http://dx.doi.org/10.21577/0100-4042.20240025

Publicado online: março 8, 2024
PDF

Total access: 498

Artigo de Contra Capa
Quim. Nova 2024, 47(7), e-20240022, 1-7

Synthesis of chiral 1,5-diamines derived from (R)-(+)-camphor

José E. D. Martins*; Luciana J. Kray; Greice M. dos Santos

Chiral 1,5-diamines derived from (R)-(+)-camphor were synthesized and fully characterized. The procedures are simple presenting moderate to good yields.

http://dx.doi.org/10.21577/0100-4042.20240022

Publicado online: fevereiro 27, 2024
PDF

Total access: 393

Artigo Quim. Nova 2024, 47(7), e-20240018, 1-5

 

Determinação multielementar em amostras de biodiesel empregando espectrometria de fluorescência de raios-x por dispersão de energia após extração induzida por quebra de emulsão

Jorge S. AlmeidaI,II; Stênio G. DomingosI; Lucilia A. MeiraI; Josanaide S. R. TeixeiraIII; Leonardo S. G. TeixeiraI,II,*


A method for multi-element determination in biodiesel samples is proposed using energy dispersive X-ray fluorescence spectrometry after an extraction induced by emulsion breaking procedure.

http://dx.doi.org/10.21577/0100-4042.20240018

Publicado online: fevereiro 15, 2024
PDF Compartilhar

Total access: 417

Quim. Nova 2024, 47(7), e-20240019, 1-9

 

Occurrence of diethyl phthalate (DEP) in food using different packaging: detection and traceability

Maria Carolina de AlmeidaI,*; Fernando Pereira de SáI; Taís Aragão IshizawaII; Flávio Alves da SilvaII; Julião PereiraII; Tatianne Ferreira de OliveiraII


Exposure routes to plasticizer migration from flexible plastic food and water packaging absorbed through the gastrointestinal system by consumers.

http://dx.doi.org/10.21577/0100-4042.20240019

Publicado online: fevereiro 16, 2024
PDF Compartilhar

Total access: 418

Quim. Nova 2024, 47(7), e-20240020, 1-8

 

Bismuth oxychloride nanosheets modified with Au-Cu nanoparticles for efficient photoreduction of CO2 to ethane

Xia Zou; Sisi Wang; Xingxing Zheng; Jun Yang*


BiOCl nanosheets modified with AuCu nanoparticles were successfully designed and fabricated for water reduction of CO2. The AuxCuy/BiOCl composites exhibited enhanced visible light absorption ability due to a surface plasmon resonance (SPR) effect. The AuxCuy/BiOCl composites could convert carbon dioxide to ethane (C2H6), while only CO was obtained over pure BiOCl nanosheets. In this study, the rate of C2H6 production (12.2 μmol h-1 g-1) and selectivity of C2H6 (75.7%) were obtained over the Au1Cu1/BiOCl photocatalyst under simulated sunlight illumination.

http://dx.doi.org/10.21577/0100-4042.20240020

Publicado online: fevereiro 27, 2024
PDF Compartilhar

Total access: 361

Quim. Nova 2024, 47(7), e-20240023, 1-6

 

Utilização do bagaço de malte para preparação de bioplásticos: uma proposta de economia circular ao setor cervejeiro

Giovanna Cassiano Azevedo Arantes; Sandy Chaves da Silva; Romulo Coriolano Dutra; Adriana Linhares Drummond;
Grace Ferreira Ghesti


Glycerol from biodiesel production was used with brewery spent grains, a residue from the brewing industry, to produce a biodegradable plastic applicable for packaging and lining, adding value to the waste.

http://dx.doi.org/10.21577/0100-4042.20240023

Publicado online: março 1, 2024
PDF Compartilhar

Total access: 422

Quim. Nova 2024, 47(7), , 1-10

 

Synthesis, biochemical and in silico exploration of novel imidazole based 1,2,3-triazoles as potential hit against carbonic anhydrase II isozyme

Mumtaz HussainI; Pervaiz Ali ChannarII,*; Aisha A. AlsfoukIII; Syeda Abida EjazIV,*; Mubashir AzizIV; Zahid HussainI; Ghulam Abbas KandhroII; Hafiz Muhammad AttaullahIV; Rabail UjanV; Mushtaque Ali JakhraniVI; Aamer SaeedVII,*; Qamar AbbasVIII,IX; Laith AbualigahX,XI,XII,XIII


The newly synthesized imidazole based 1,2,3-triazoles were evaluated as carbonic anhydrase-II via comprehensive in silico investigations.

http://dx.doi.org/10.21577/0100-4042.20240026

Publicado online: março 13, 2024
PDF Informação suplementar
Compartilhar

Total access: 314

Quim. Nova 2024, 47(7), e-20240027, 1-5

 

Determinação e distribuição de Cu, Fe E Zn em Camapu por ICP-OES

Cecilia Correia Pereira; Michelle de Souza Lemos; Kelly das Graças Fernandes Dantas*


Total content of copper, iron, and zinc were determined in camapu (Physalis angulata), lipids and protein fractions by inductively coupled plasma emission spectrometry.

http://dx.doi.org/10.21577/0100-4042.20240027

Publicado online: março 13, 2024
PDF Compartilhar

Total access: 329

Quim. Nova 2024, 47(7), e-20240028, 1-8

 

Uso de filmes de quitosana para extração do corante alimentar Bordeaux S com quantificação por análise de imagens digitais

Igor Coreixas de Sá; Fernanda Neves Feiteira; Rafael Machado Dornellas; Wagner Felippe Pacheco*


In this work, chitosan sorbent films were synthesized, characterized and used to retain Bordeaux S present in gelatin samples, followed by recording the films' images and quantifying the analyte by digital images analysis.

http://dx.doi.org/10.21577/0100-4042.20240028

Publicado online: março 14, 2024
PDF Informação suplementar
Compartilhar

Total access: 378

Quim. Nova 2024, 47(7), e-20240040, 1-6

 

Flavonoides e ácidos fenólicos isolados dos extratos metanólicos das folhas e galhos de Macrolobium acaciifolium (Fabaceae)

David R. Silva; Cecilia V. Nunez*


Performed procedures and type of flavonoids isolated from leaves and branches of Macrolobium acaciifolium (Fabaceae).

http://dx.doi.org/10.21577/0100-4042.20240040

Publicado online: abril 10, 2024
PDF Informação suplementar
Compartilhar

Total access: 307

Quim. Nova 2024, 47(7), e-20240041, 1-5

 

Determination of maillard reaction markers in doce de leite by HPLC-PDA

Caroline Barroso dos Anjos PintoI; Carolina Neves CunhaII; Natalia Casas MesaI; Maria Esther Leal da Silva SadII;
Rodrigo StephaniI; Ítalo Tuler PerroneII; Juliana de Carvalho da CostaII,*


Development and validation of a sensitive and linear method to quantify four Maillard reaction markers in doce de leite by high pressure liquid chromatography with photodiode-array detection.

http://dx.doi.org/10.21577/0100-4042.20240041

Publicado online: abril 10, 2024
PDF Compartilhar

Total access: 272

Quim. Nova 2024, 47(7), e-20240042, 1-9

 

Theoretical study of molecules derived from beta-lactams compounds with possible potential antibiotic activity on Staphylococcus aureus

Jorge Anaya-GilI,*; Gina Mercado-BeltránI; Ana Guerrero-GonzálezI; Jairo Mercado-CamargoI; Maicol Ahumedo-MonterrosaI,II; Ricardo Vivas-ReyesII


In silico modifications of molecules derived from beta-lactam compounds were carried out. These new molecules were docked with transpeptidase and beta-lactamase enzymes, and all of them showed a higher affinity for transpeptidase than the reference molecule (methicillin), but only two showed a lower affinity for beta-lactamase, and the two molecules that presented the best ranking docking results were subjected to molecular dynamics simulations to assess conformational stability.

http://dx.doi.org/10.21577/0100-4042.20240042

Publicado online: abril 10, 2024
PDF Informação suplementar
Compartilhar

Total access: 297

Revisão Quim. Nova 2024, 47(7), e-20240017, 1-12

 

Obtenção de aminas primárias a partir da redução de nitrocompostos aromáticos via protocolos de reações sustentáveis parte II: em meio orgânico

Ligia S. da S. PintoI; Victor FacchinettiII; Breno de S. BernardesI; Thamires M. da CostaI; Letícia de O. J. L. da SilvaI; Daniel M. MacedoI; Isabela P. de OliveiraI; Thatyana R. A. VasconcelosI,*; Marcus Vinícius N. de SouzaII,*


Environmentally friendly and highly selective conditions for the reduction of nitroarenes to their respective primary amines.

http://dx.doi.org/10.21577/0100-4042.20240017

Publicado online: fevereiro 7, 2024
PDF Compartilhar

Total access: 416

Educação Quim. Nova 2024, 47(7), e-20240021, 1-7

 

Fármacos na pandemia da COVID-19: uma temática para a educação ambiental crítica no ensino de química analítica

Mariana S. CecilioI; Camila G. PassosI; Maurícius S. PazinatoI,*; Carla SirtoriI,II


Group of students discussing about the pharmaceuticals promoted as COVID treatment in Brazil (known as COVID kit), sample preparation, chromatography and environment.

http://dx.doi.org/10.21577/0100-4042.20240021

Publicado online: fevereiro 27, 2024
PDF Informação suplementar
Compartilhar

Total access: 411

Assuntos Gerais Quim. Nova 2024, 47(7), e-20240024, 1-16

 

Aprendizado de máquina aplicado a qsar

Renata P. B. de MenezesI; Luciana ScottiI; Marcus T. ScottiI,*


Application of machine learning to build computational models capable of correlating chemical structures with the intrinsic activity of the molecule and thus making predictions of activity of molecules that have unknown biological activity.

http://dx.doi.org/10.21577/0100-4042.20240024

Publicado online: março 5, 2024
PDF Compartilhar

Total access: 397

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