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ARTIGOS RECENTES


Artigo

COMPUTATIONAL REACTIVITY ANALYSIS FOR DRUGS SALBUTAMOL AND IPRATROPIUM BROMIDE: A COMPARATIVE STUDY

Karunagaran Subramanian; Guillermo Salgado; Assia Belhassan; Lorena Gerli Candia; Wilson Cardona V

The drugs salbutamol and ipratropium bromide with their electronic structure, frontier molecular orbitals and other parameters were analyzed to evaluate their effectiveness in treating respiratory problems such as asthma and chronic obstructive lung disease.

http://dx.doi.org/10.21577/0100-4042.20250217

Publicado online: setembro 18, 2025
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Total access: 3

OPTIMIZATION OF FUEL CELL-ASSISTED HEATING COLD-START STRATEGY BASED ON NSGA-II ALGORITHM

Yongming Shao; Mingyu Lu; Haomai Feng; Yucheng Hou; Yueqi Si

To address the fuel cell cold-start bottleneck, a one-dimensional (1D) multi-phase stack model was developed, and the non-dominated sorting genetic algorithm (NSGA)-II was used to optimize coolant flow rate, positive temperature coefficient (PTC) heating power, and load rate for auxiliary heating strategies. The optimal solution (0.45 kg s-1 coolant, 2375 W PTC, 0.02268 A cm-2 load rate) cuts the minimum cold-start temperature to 247.15 K and significantly enhanced performance.

http://dx.doi.org/10.21577/0100-4042.20250214

Publicado online: setembro 4, 2025
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Total access: 145

SUSTAINABLE OBTAINING OF ANTILEISHMANIAL COMPOUNDS FROM Cedrela odorata L. DEMOLITION WOOD AS AN EXAMPLE OF THE CIRCULAR BIOECONOMY

Paulo Alan D. Nogueira; Henrique C. dos Santos; Claudete C. do Nascimento; Bruno B. Jensen; Antonia Maria R. Franco; Pamela Emily T. Iwabuchi; Maria da Paz Lima

Gedunin-type limonoids obtained from wood residues were evaluated against promastigote forms of Leishmania guyanensis and L. amazonensis.

http://dx.doi.org/10.21577/0100-4042.20250213

Publicado online: setembro 4, 2025
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Total access: 156

DETECTION OF MELAMINE IN PACKAGING MATERIALS USING TERAHERTZ TIME-DOMAIN SPECTROSCOPY

Shuo Zhang; Yuanrong Yang; Kun Meng; Xinyong Zhu; Longjiang Huang; Lina Sui; Liyan Yu

This study demonstrates the nondestructive testing technique of terahertz time-domain spectroscopy to detect melamine through common packaging materials. Distinct absorption peaks at 2.0 and 2.28 THz enabled quantification with high sensitivity.

http://dx.doi.org/10.21577/0100-4042.20250211

Publicado online: setembro 2, 2025
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Total access: 99

DETERMINAÇÃO DO FLAVONOIDE QUERCETINA EM EXTRATOS DE PLANTA POR INFRAVERMELHO (ATR-FTIR) E QUIMIOMETRIA

Nadia B. da Costa; Matheus F. L. de Oliveira; Eduardo B. de Almeida Jr; Antônio J. Cantanhede Filho; Gilmar S. da Silva; Eliane R. de Sousa

Mid-infrared spectroscopy with attenuated total reflection and chemometric tools were applied to analyze flavonoids in extracts from 15 plant species through exploratory analysis and multivariate calibration.

http://dx.doi.org/10.21577/0100-4042.20250210

Publicado online: setembro 1, 2025
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Total access: 153

INCREASED SOLUBILITY AND DISSOLUTION OF GELUCIRE® 50/13 SOLID DISPERSIONS CONTAINING CARBAMAZEPINE

Oscar G. da Silva Neto; Rodrigo M. Martins; Denilson L. Rocha; Gustavo L. F. Barbosa; Maria E. C. B. Rangel; Wladymyr J. B. de Sousa; Ana R. M. de Lima; Luis A. P. de Freitas

Gelucire® 50/13-based solid dispersions significantly improved the solubility of carbamazepine. The best-performing formulation was characterized physicochemically.

http://dx.doi.org/10.21577/0100-4042.20250209

Publicado online: setembro 1, 2025
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Total access: 120

EFFICIENT TREATMENT OF NiII-CITRIC ACID COMPLEXES IN NICKEL PLATING EFFLUENT USING ELECTROCATALYTIC OXIDATION-SYNERGISTIC ELECTRODEPOSITION METHOD AND NICKEL RESOURCE RECOVERY

Bingzhao Cui; Zhigang Xie; Jun Yang; Xiankang Liu; Yuhan Wang; Chenlin Xu; Meiying Huang

This diagram illustrates the anode electrocatalytic oxidation decomplexation pathway and the cathode electrodeposition process for nickel recovery in a system integrating electrocatalytic oxidation with electrodeposition technology for treating NiII-citric acid complexes (Ni-Cit).

http://dx.doi.org/10.21577/0100-4042.20250208

Publicado online: setembro 1, 2025
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Total access: 152

Variante da espectrometria gama para avaliação de Cs-137 em matrizes análogas ao açúcar como requisito de segurança alimentar

Yasmin Marques dos SantosI; Mariana Brayner Cavalcante Freire BezerraI; Isvânia Maria Serafim da Silva LopesII; José Araújo dos Santos JúniorI,*; Romilton dos Santos AmaralI; Josineide Marques do Nascimento SantosI,III; Zahily Herrero FernándezI,III; Beatriz Cardoso Campos de AssunçãoIV; Camilla de Andrade Tenorio CavalcantiV; Keyth Roslyn Barbosa da SilvaI

The Graphical Abstract represents the monitoring of unsupported radionuclide, Cs-137, and the importance of designing an efficient, low-cost methodology with qualitative and quantitative rigor to meet nuclear and food safety criteria.

http://dx.doi.org/10.21577/0100-4042.20250205

Publicado online: agosto 26, 2025
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Total access: 137

Enhancement of curcumin bioavailability using a controlled drug delivery system based on chitosan and green iron oxide nanoparticles (Fe3O4)

Fernanda K. Alves de SouzaI; Maria Laura F. Della CostaI; Marco A. MoralesII; Aroldo G. MagdalenaI,*

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: 149

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. SouzaI,II,*; Adriana S. de OliveiraII; Wagner Felippe PachecoIII; Marcos A. S. CostaI

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: 147

Processo de hidrometalurgia para extração de CuII presente em placas de circuito impresso utilizando peróxido de hidrogênio e ácidos como agente lixiviantes

Camila Ferreira PintoI; Eduarda Maia GuimarãesII; Marquele Amorim TonhelaI; Sandra Cristina DantasII; Ana Claudia Granato MalpassII; Geoffroy Roger Pointer MalpassI,II,*

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: 151

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: 185

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: 224

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: 147

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: 175

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: 182

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: 205

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: 301

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: 325

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: 226

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: 334

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
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Total access: 300

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: 241

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: 226


Nota Técnica

APLICATIVO GAMMA-GUI: UMA INTERFACE GRÁFICA AMIGÁVEL PARA ANÁLISE EXPLORATÓRIA DE DADOS NO MATLAB

Diego Galvan; Tácito Lucena Conte; João Marcos Marques Liduário; Jelmir Craveiro de Andrade; Patrícia Casarin; Evandro Bona

A Matlab® graphical user interface for exploratory data analysis (EDA) for users unfamiliar with the programming language.

http://dx.doi.org/10.21577/0100-4042.20250206

Publicado online: agosto 28, 2025
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Total access: 170


Educação

SUBSUNÇORES E FORMAÇÃO CONCEITUAL NO ENSINO SUPERIOR: INDÍCIOS DE APRENDIZAGEM SIGNIFICATIVA EM CINÉTICA QUÍMICA

Gyovana L. Welsing; Lília do E. S. A. de Oliveira; Marta A. Machado; Paulo R. G. de Moura

The investigation of previous knowledge, as well as the stimulation of the anchoring of new information, enriches the teaching of chemistry, especially the teaching of chemical kinetics.

http://dx.doi.org/10.21577/0100-4042.20250207

Publicado online: agosto 29, 2025
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Total access: 122

Estudos de caso interrompidos: produção e aplicação no ensino superior de química

Pablyana L. R. da CunhaI,II; Raíla R. S. AlmondesII; Salete L. QueirozII,*

Three interrupted case studies, based on research articles, were developed and implemented in a scientific communication course.

http://dx.doi.org/10.21577/0100-4042.20250204

Publicado online: agosto 26, 2025
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Total access: 125

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: 207

Estudos de caso: possibilidades para o desenvolvimento da educação ambiental crítica na pós-graduação em química

Lisiane B. LimaI; Daniel C. A. RibeiroI; Guilherme L. DornelesI; Carla SirtoriII; Camila G. PassosI,*

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: 162

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: 212

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: 304


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: 143

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