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ARTIGOS RECENTES


Artigo

ENHANCEMENT OF CURCUMIN BIOAVAILABILITY USING A CONTROLLED DRUG DELIVERY SYSTEM BASED ON CHITOSAN AND GREEN IRON OXIDE NANOPARTICLES (Fe3O4)

Fernanda K. Alves de Souza; Maria Laura F. Della Costa; Marco A. Morales; Aroldo G. Magdalena

Controlled release system of curcumin encapsulated by chitosan and carried by green iron oxide (Fe3O4) nanoparticles to enhance curcumin bioavailability.

http://dx.doi.org/10.21577/0100-4042.20250202

Publicado online: agosto 20, 2025
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Total access: 57

DETERMINATION OF BRODIFACOUM BY GAS CHROMATOGRAPHY COUPLED TO MASS SPECTROMETRY: A NEW ANALYTICAL METHODOLOGY FOR THE DETERMINATION OF COUMARIN RODENTICIDES IN POISONED FOODS

Daniel B. Souza; Adriana S. de Oliveira; Wagner Felippe Pacheco; Marcos A. S. Costa

Gas chromatography coupled with mass spectrometry can be used to identify the coumarin brodifacoum in poisoned foods.

http://dx.doi.org/10.21577/0100-4042.20250200

Publicado online: agosto 18, 2025
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Total access: 70

PROCESSO DE HIDROMETALURGIA PARA EXTRAÇÃO DE CuII PRESENTE EM PLACAS DE CIRCUITO IMPRESSO UTILIZANDO PERÓXIDO DE HIDROGÊNIO E ÁCIDOS COMO AGENTE LIXIVIANTES

Camila Ferreira Pinto; Eduarda Maia Guimarães; Marquele Amorim Tonhela; Sandra Cristina Dantas; Ana Claudia Granato Malpass; Geoffroy Roger Pointer Malpass

Hydrochloric acid (HCl) and hexafluorosilicic acid (H2SiF6) are used to extract copper as CuII from printed circuit boards, producing H2 as a byproduct.

http://dx.doi.org/10.21577/0100-4042.20250199

Publicado online: agosto 15, 2025
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Total access: 64

Identificação e quantificação do teor de umidade em óleo lubrificante automotivo: um estudo de caso

Diogo La Rosa Novo*; Lucas Ceron Kikhofel; Milene Marques Freitas; Wanderson da Silva Roriz; Claudio Martin Pereira de Pereira; Daniela Bianchini; Carla de Andrade Hartwig

The study reports moisture determination in an engine lubricating oil using six different analytical strategies. It highlights the importance of controlling moisture in commercial lubricating oils to certify their quality and describes a forensic case study.

http://dx.doi.org/10.21577/0100-4042.20250197

Publicado online: agosto 11, 2025
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Total access: 105

Application of TiO2 semiconductors for the simultaneous degradation of Naproxen, Diclofenac, and Mefenamic acid in surface waters

José F. P. DinizI,*; Sayna K. P. VianaII; Lanna K. SilvaI; Gilmar S. da SilvaI; Samara A. EschriqueIII; Adriana B. AraújoI

Pharmaceutical contaminants in water pose significant environmental risks. This study optimizes photocatalytic treatment using Ag/TiO2 catalysts to degrade naproxen, diclofenac, and mefenamic acid. Effective degradation in brackish water achieved 90% degradation of naproxen within 10 h.

http://dx.doi.org/10.21577/0100-4042.20250196

Publicado online: agosto 11, 2025
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Total access: 109

Organosolv pretreatment with commercial and crude glycerol together with FeCl3 of the corn straw and corn cob biomasses, both individually and mixed

Joselaine C. Santana*; Cláudio Dariva

Corn processing generates a large amount of straw and cob. These lignocellulosic residues can be subjected to an organosolv pretreatment process with glycerol, aiming to obtain reducing sugars necessary for the production of cellulosic ethanol.

http://dx.doi.org/10.21577/0100-4042.20250195

Publicado online: agosto 8, 2025
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Total access: 83

Fios biodegradáveis de quitosana com membrana testácea do ovo de galinha (gallus gallus domesticus) reticulados com riboflavina

Lucas C. OliveiraI,*; Igor M. CastroII; Taynah P. GaldinoI; Albaniza A. TavaresI; Suédina Maria L. SilvaI;
Marcus Vinícius L. FookI; Rossemberg C. BarbosaI

Biodegradable suture threads were synthesized from chitosan and powdered eggshell membrane, followed by preparation, suture thread formation, crosslinking with riboflavin, and chemical, morphological, and mechanical characterization.

http://dx.doi.org/10.21577/0100-4042.20250192

Publicado online: agosto 7, 2025
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Total access: 101

Remediation of tannery and electroplating wastewaters: adsorption of heavy metals by Chlorella sorokiniana and Heterochlorella luteoviridis

Allan MorcelliI,*; Gabriel Luiz VencatoII; Rosane RechIII; Nilson Romeu MarcílioIII

The figure depicts a factory with the words “tannery/electroplating industry” above it is shown with an arrow coming out of it, representing copper, chromium, iron and zinc ions going into a shake flask with green liquid where microalgae are illustrated being cultivated.

http://dx.doi.org/10.21577/0100-4042.20250189

Publicado online: agosto 1, 2025
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Total access: 109

Bolhômetro digital: construção de instrumento de medida de vazão gasosa baseado em transmitância de luz em faixas de 15-150 mL min-1

Igor R. NevesI,*; André J. R. SimõesII; Leandro R. TeixeiraII; Juliane G. C. GomesII; Soraia T. BrandãoI; Iuri M. PepeII

The image shows schemes of an analog bubble-flowmeter and present warnings about its challenges (long analysis time, ergonomic risk) and shows its replacement with a digital bubble-flowmeter thereby eliminating the challenges.

http://dx.doi.org/10.21577/0100-4042.20250180

Publicado online: julho 18, 2025
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Total access: 139

Abordagens DFT para espectros de absorção UV-VIS: explorando semelhanças e diferenças em compostos orgânico e de coordenação

Vania Martins Ramos; Bruno Campana Severino; Ana Paula de Lima Batista*

Different density functional theory (DFT) / time-dependent DFT (TD-DFT) protocols for ultraviolet-visible (UV-Vis) spectra were assessed, optimizing functionals, basis sets, and solvation models for reliable geometric and spectral analysis of organic and inorganic compounds.

http://dx.doi.org/10.21577/0100-4042.20250179

Publicado online: julho 18, 2025
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Total access: 197

Kinetic study of 1020 carbon steel corrosion in hydrochloric and nitric acid media

Fernando C. OliveiraI; Almir Silva NetoI; Lucas Brites FaresII; Tiago Almeida SilvaII; Renata Maria Seara MartinsI,*

The kinetic study of 1020 carbon steel corrosion revealed zero-order kinetics for the HCl system and first-order kinetics for the HNO3 system.

http://dx.doi.org/10.21577/0100-4042.20250177

Publicado online: julho 17, 2025
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Total access: 232

Microencapsulated powders of agraz (Vaccinium meridionale Swartz) fruit as a carrier for metabolites with in vitro antihypertensive activity

Andrés Mauricio AmayaI; María Carolina OtáloraII; Coralia OsorioI,*

The angiotensin converting enzyme-I (ACE-I) inhibition of Vaccinium meridionale Swartz fractions and microencapsulates was evaluated, finding that anthocyanins are responsible for this activity.

http://dx.doi.org/10.21577/0100-4042.20250175

Publicado online: julho 14, 2025
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Total access: 156

Solvente eutético profundo para extração de cobre em amostras de chás e determinação por GF AAS

Eduardo da Silva Macedo; Caroline Gonçalves; Fabiana Luvizon Germer; Eduardo Sidinei Chaves*

Deep eutectic solvent for extraction of copper from tea samples.

http://dx.doi.org/10.21577/0100-4042.20250172

Publicado online: julho 7, 2025
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Total access: 233

Tannic acid supported by magnetite nanoparticles for the removal of CdII and PbII from water

Camilo Eduardo García Henao; Guillermo Salamanca Grosso; Anderson Guarnizo Franco*

Magnetite nanoparticles-supported tannic acid capturing CdII and PbII from water.

http://dx.doi.org/10.21577/0100-4042.20250171

Publicado online: julho 7, 2025
PDF Informação suplementar

Total access: 213

Comparison between methodologies for the calculation of kinetic triplet for the pyrolysis of heterogeneous biomass (sunflower seed husks)

Arthur T. F. A. AraújoI; Nádia G. SousaII; Cássia R. CardosoIII; Daniel A. CerqueiraIV,*

The work presents a comparison of methodologies for the kinetic modelling of heterogeneous biomass pyrolysis, and shows a precise representation, with low deviations between theoretical and experimental curves.

http://dx.doi.org/10.21577/0100-4042.20250170

Publicado online: julho 4, 2025
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Total access: 179

Raman spectroscopy: a study of the vibrational spectra of hydroxybenzoic acid isomers

Shaoliang ShiI,#; Shan TuII,III,#,*; Wentao ZhangII,*; Song YangII; Hao DuII; Yuanpeng LiIII; Junhui HuIII; Huapeng XiaoIII

This graphical summary illustrates the molecular structures of the three chiral molecules: ortho-hydroxybenzoic acid (O-HA), meta-hydroxybenzoic acid (M-HA), and para-hydroxybenzoic acid (P-HA). The left side shows the Raman spectral signals, while the middle compares experimental and theoretical Raman spectra, highlighting the recognition process. Finally, the right side presents their vibrational modes.

http://dx.doi.org/10.21577/0100-4042.20250169

Publicado online: julho 3, 2025
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Total access: 169

Obtenção de um plástico biodegradável à base de fécula de araruta (Maranta arundinacea) e casca de ovo

Rosanny C. da SilvaI,*; Cleylton B. LopesII; Fred A. R. NogueiraI; Leonardo V. da SilvaI; Alessandra F. da SilvaI; Amanda V. S. OliveiraI; Elisangela O. da SilvaI; Italo G. dos S. SilvaI; Jose C. dos S. SilvaI; Julia E. de C. SilvaI; Julie A. dos S. QuintelaI; Larissy A. da S. RibeiroII; Maria C. P. D da C. GomesII; Marilian G. dos S. BernardoI; Walleska J. de A. MarquesI

Calcium carbonate derived from eggshells was added to arrowroot film, resulting in a polymer composite capable of preserving food.

http://dx.doi.org/10.21577/0100-4042.20250166

Publicado online: junho 26, 2025
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Total access: 288

Efficient extraction of 2'-Fucosyllactose from human milk: parameter optimization with surface response

Elienae da Silva Gomes; Eloize Silva Alves; Patricia Daniele Silva Santos; Marcela de Souza Zangirolami; Oscar Oliveira Santos

Optimization of the extraction of the 2'-fucosyllactose from human milk, finding experimental conditions including optimizing solvent (water) and centrifugation time for safe and rapid extraction.

http://dx.doi.org/10.21577/0100-4042.20250157

Publicado online: junho 16, 2025
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Total access: 218

Clarificación de vinazas provenientes de la industria de la "raicilla", mediante el uso de hidrogeles

Maribel Arrizón FregozoI; Nestor García RamírezI; Jorge Alberto Cortes OrtegaII; Juan Carlos Sánchez DíazI,*

Scheme of the process of copper ion absorption, transformation into copper hydroxide entrapped in the hydrogel and the absorption of furfural, one of the organic compounds present in vinasse.

http://dx.doi.org/10.21577/0100-4042.20250156

Publicado online: junho 13, 2025
PDF Informação suplementar

Total access: 275

Synthesis of the TiO2/g-C3N4 photocatalyst and its photocatalytic performance for selective oxidation of alcohols

Shuangyan MengI; Bin LiuI; Minglin XieI; Chaoxin YunI; Jin QiangI; Kaizhou HeI; Zhiwang YangII; Xiangqian WangI,*

A composite photocatalyst, xTCN, was synthesized using a simple one-step hydrothermal method, with H2O2 as the oxidant. This approach effectively reduced the bandgap energy and minimized the recombination of photogenerated carriers. The bandgap structure of g-C3N4 was modified by the incorporation of an O atom, improving the separation efficiency of the photogenerated electrons and holes.

http://dx.doi.org/10.21577/0100-4042.20250155

Publicado online: junho 13, 2025
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Total access: 193

Sensor eletroquímico baseado em óxido de grafeno reduzido e estanato de zinco para determinação de prometazina

Andreza L. MoreiraI; Janevane S. de CastroI,II; Anderson V. ChavesI; Pierre B. A. FechineI; Pedro de Lima-NetoI,;
Francisco W. P. RibeiroIII; Paulo N. S. CascianoI; Adriana N. CorreiaI,*

Schematic diagram of the procedure used. It consists of a glassy carbon electrode modified with graphene oxide and zinc stannate and a potentiostat/galvanostat coupled to a computer and can be used for the analysis of promethazine hydrochloride.

http://dx.doi.org/10.21577/0100-4042.20250144

Publicado online: maio 20, 2025
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Total access: 342

Thermoplastic starch-ucuuba biocomposites: effect of buriti pulp oil on lignocellulosic fiber dispersion

Marcelo F. L. OliveiraI; Valdir F. Veiga-JuniorII; Marcia G. OliveiraI,; Fernanda Cristina F. BragaI,*

The study investigates thermoplastic starch (TPS) biocomposites with ucuuba fibers, focusing on the effect of buriti pulp oil. This oil improved the matrix, decreasing hydrophilicity and slightly increasing strength, while rheological and scanning electron microscopy (SEM) analyses confirmed better plasticization and enhanced thermal stability.

http://dx.doi.org/10.21577/0100-4042.20250142

Publicado online: maio 15, 2025
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Total access: 257

Caracterização, análise quimiométrica e ensaios preliminares de adsorção de corantes têxteis em celulose bacteriana: uma tecnologia para tratamento de efluentes com proposta para desenvolvimento de economia sustentável

Rafaela J. L. Gouveia-RamosI,*; Alex S. MoraesII; Arthur L. Silva de AraújoII; Larissa M. S. GomesII; Thaís J. M. P. SoutoII; Beatriz S. SantosI; Otávio P. Santos JúniorIII; Romildo M. HolandaI; Gledson Luiz Pontes de AlmeidaI

In the research, a bio adsorbent was produced as an alternative to textile wastewater treatment and could act as a tool for recycling dyes and saving water. This process would reduce the costs of dyeing fabrics by obtaining a new "ecological dye" for subsequent tanning.

http://dx.doi.org/10.21577/0100-4042.20250136

Publicado online: maio 6, 2025
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Total access: 391


Revisão

Organismos marinhos como fonte de novos fármacos: 15 anos e uma pandemia depois

Mateus F. BritoI; Thayssa S. F. FagundesII,III; Paula C. JimenezIV; Alessandra L. ValverdeI,*

A scientist is confused by the number of articles about marine organisms used as medicine and how they change over time. Talking to another scientist, they decide to write a review article to compile the data into a single document.

http://dx.doi.org/10.21577/0100-4042.20250167

Publicado online: julho 1, 2025
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Total access: 279


Educação

AN INQUIRY INTO STRUCTURING CONCEPTS IN ORGANIC CHEMISTRY BASED ON THE ANALYSIS OF TEXTBOOKS AND THE PERSPECTIVES OF TEACHERS FROM BRAZILIAN UNIVERSITIES

Gabrielle O. P. Costa; Pedro C. de Araujo; Renata T. M. P. de Souza; Matheus S. B. da Silva; Eliana C. F. Spaziani;
Ana C. Kasseboehmer

Structuring concepts in organic chemistry through textbooks and university professors' perspectives. The image highlights key topics such as chemical bonding, stereochemistry, structure, and acidity-basicity, reinforcing the need for integrated conceptual understanding in teaching.

http://dx.doi.org/10.21577/0100-4042.20250203

Publicado online: agosto 21, 2025
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Total access: 77

ESTUDOS DE CASO: POSSIBILIDADES PARA O DESENVOLVIMENTO DA EDUCAÇÃO AMBIENTAL CRÍTICA NA PÓS-GRADUAÇÃO EM QUÍMICA

Lisiane B. Lima; Daniel C. A. Ribeiro; Guilherme L. Dorneles; Carla Sirtori; Camila G. Passos

This research analyzes the potential of preparing Case Study statements in postgraduate chemistry courses as a means of incorporating the principles of critical Environmental Education.

http://dx.doi.org/10.21577/0100-4042.20250201

Publicado online: agosto 20, 2025
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Total access: 53

Dicromatometria em microescala: motivação para diminuir os impactos ambientais no ensino da química analítica

Gabriel N. F. NettoI; Flávia F. de C. MarquesI; Rafaella R. A. PeixotoII; Christiane B. DuyckI,*

The microtitration of iron in dietary suplements by dichromate is presented as a sustainable alternative method to classical dichrometry, with less exposure and minimizing the generation of toxic residues.

http://dx.doi.org/10.21577/0100-4042.20250176

Publicado online: julho 15, 2025
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Total access: 146

Promoting undergraduate students' scientific literacy through a science communication project

Melina MurgelI,*; Diorleno SantosII; Liliana MarzoratiI

Science Communication pieces created by undergraduate students were analyzed for the presence of the Structural Axes of Scientific Literacy. Results showed prevalence of chemical concepts and Science, Technology, Society, and Environment (STSE) discussions but indicated a need for further attention to Nature of Science.

http://dx.doi.org/10.21577/0100-4042.20250174

Publicado online: julho 10, 2025
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Total access: 214

Uma simulação de caso para investigação de vestígios: análise de adulterantes de cocaína em impressões digitais utilizando a técnica do pó e espectrometria de massas

Paula F. FilodaI,*; Tais PolettiI,II; Bruno N. da RosaI,II; Caroline I. SilveiraI,II; Alexandre M. MachadoIII; Jeanifer T. CamachoI; Samuel A. PereiraI,II; Clarissa M. M. dos SantosIV; Claudio M. P. PereiraI,II

Chemical concepts behind fingerprints addressed through a forensic situation, in order to arouse students' interest and curiosity during teaching.

http://dx.doi.org/10.21577/0100-4042.20250161

Publicado online: junho 17, 2025
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Total access: 203

Integração entre ensino, pesquisa e extensão: impactos do programa 1000 futuros cientistas na educação básica

Janaína P. Silva; Juliana A. S. Oliveira; Wladmir T. Silva; Natália R. S. Araujo; Rita C. O. Sebastião*

Integration between teaching, research and extension, pillars of the 1000 Future Scientists program, highlighting the importance of university extension in the articulation between academic knowledge and teaching through social practices.

http://dx.doi.org/10.21577/0100-4042.20250143

Publicado online: maio 20, 2025
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Total access: 253


Assuntos Gerais

Oppenheimer em Belo Horizonte: um resgate histórico

Cássius K. NascimentoI; Breno R. L. GalvãoII; João P. BragaIII,*

Julius Robert Oppenheimer visited the city of Belo Horizonte in his first trip to Brazil in 1953. In an interview, he said "Brazil's future atomic industry should be located in Minas Gerais".

http://dx.doi.org/10.21577/0100-4042.20250198

Publicado online: agosto 11, 2025
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Total access: 73

A química de alto impacto e a inovação: quais pesquisas têm ganhado destaque?

Paola B. Abib; Flávia M. de Freitas; Bruno dos S. Pastoriza; Fábio A. Sangiogo*

Innovation in Chemistry was investigated and some themes emerged, relating to the production of new materials, meeting energy demands, sustainability and human health.

http://dx.doi.org/10.21577/0100-4042.20250163

Publicado online: junho 25, 2025
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Total access: 29

Furtos de fontes de radiação e seus impactos: aplicação de conceitos de radioquímica/química nuclear e seus desdobramentos para a sociedade

Hector H. S. MedradoI,II,*; Rodrigo G. de Souza GoisI,III; Gildo R. S. FerreiraIV; Carlos Alberto de Carvalho FilhoII

Radioactive sources are widely used in modern society but are not widely known by the lay public. Unfortunately, these materials can be stolen and can cause serious problems to society. Assessing this kind of event is only possible if nuclear chemistry and radiochemistry concepts are recognized.

http://dx.doi.org/10.21577/0100-4042.20250150

Publicado online: junho 4, 2025
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Total access: 225

Perfil dos jovens doutores em química no Brasil: desafios, disparidades e perspectivas

Helena Mannochio-RussoI,*; Fábio G. DeloloII; Rayane C. F. SilvaII; Francisco L. F. da SilvaIII; Eduarda A. MoreiraIV; Vanessa NascimentoV; Rodolfo G. FiorotV; Irlon M. FerreiraVI; Juliana C. ThomasVII; Wilhan D. G. NunesI; Alan C. PilonVIII; Romeu C. Rocha-FilhoIX

Mapping the landscape of early-career researchers in chemistry across Brazil, highlighting demographic trends, research productivity, and challenges.

http://dx.doi.org/10.21577/0100-4042.20250148

Publicado online: maio 30, 2025
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Total access: 464

30 Anos das tabelas periódicas da SBQ: cursos passados e estado atual

Ana Paula de Lima BatistaI,#,*; Antonio Gustavo Sampaio de Oliveira-FilhoII,#,*; Romeu C. Rocha-FilhoI,#,*;
Yuri Alexandre AotoIII,IV,#,*

Overlay of the different formats (2025 versions) of the periodic table of the elements of the Brazilian Chemical Society: in the background, the front of the A4 format, overlaid in sequence by the poster format and the digital format.

http://dx.doi.org/10.21577/0100-4042.20250115

Publicado online: maio 30, 2025
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Total access: 573

Oswaldo Sala: cientista, educador e exemplo

Dalva L. A. de FariaI,II,*; Joel C. RubimIII; Marcia L. A. TemperiniI; Mauro C. C. RibeiroI; Paola CorioI; Paulo S. SantosI;
Rômulo A. AndoI; Yoshio KawanoI

Oswaldo Sala played a pioneering role in the introduction and development of vibrational spectroscopy in Brazil and Latin America. His trajectory is here detailed, from his hiring by USP (IAG 1949) to the consolidation of his research group at IQUSP, from 1969 onwards.

http://dx.doi.org/10.21577/0100-4042.20250141

Publicado online: maio 13, 2025
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Total access: 301

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