JBCS

An iron oxide-based scavenger captures hydrogen sulfide along with aliphatic (AHs) and polycyclic aromatic hydrocarbons (PAHs) from raw natural gas. While enabling the production of purified sweetened gas, the process requires careful management of the spent scavenger due to hydrocarbon retention.

Pelotas, in southern Brazil, is known as the National Capital of Sweets. Traditional production uses copper pans, which are essential to local confectionery, although their use is prohibited in the city. This study quantifies the copper content in traditional sweets and compares the results with regulatory limits established for this metal in other foods.

This study reports the chemical profiling of two Evolvulus species and assesses their phenolic content, antioxidant activity, and sun protection factors (SPF). Both species demonstrated promising biological activities and potential applications as ingredients for sunscreen formulations.

Bendamustine forms a stable and complex with CT-DNA (calf thymus-deoxyribonucleic acid) by non-covalent interactions and non-intercalating binding, suggesting a new antineoplastic mechanism.

This study employs an eco-friendly lactic acid-based deep eutectic solvent (DES) for leaching and recycling metal ions from spent LiFePO₄. The prepared DES achieves a Li leaching efficiency of 94.57% and an Fe leaching efficiency of 92.98% under optimal conditions.

The graphical abstract summarizes the colorimetric Scott test for cocaine detection, image processing with GIMP^® (GNU Image Manipulation Program), color parameter extraction in ChemoStat^®, collinearity analysis in RStudio^®, and classification algorithm evaluation based on performance metrics.

The [RuCl₂(p-cymene)]₂ complex promotes the isomerization and olefin metathesis of substituted allylbenzenes (methyleugenol, eugenol, and estragole), highlighting the influence of catalyst-to-substrate ratio and olefin acidity on product selectivity.

The study uses infrared spectroscopy techniques to differentiate authentic and counterfeit Brazilian banknotes. Spectral data were analyzed using near-infrared (NIR) and Fourier transform infrared (FTIR) spectroscopy, then processed with Matlab, Origin and Orange.

The newly synthesized crystal of dihydropyrimidine-thiones were evaluated as cholinesterase inhibitors targeting Alzheimer's disease via comprehensive in vitro and in silico investigations.

Analysis and qualification by electron spray ionization mass spectrometry (ESI-MS/MS) of fermented beverages from honeys of native bees in Brazil.

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

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.

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.

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

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 Ni^II-citric acid complexes (Ni-Cit).

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.

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

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

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

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

Light microscopy and laser diffractometry are compared to measure micron-scale spacings on compact discs (CDs), digital versatile discs (DVDs), and electron microscopy grids, validating the observed diffraction patterns. Using affordable materials, green and red lasers are employed to visualize the diffraction phenomena.

Letters from the past are read by future graduates. Ten to twelve years separate them. Has the teaching profession changed? Has the career path changed? Has the world changed? And what do those who wrote the letters say today?

When a teacher explains molecular geometry using verbal descriptions, chemical formulas, modeling clay, software, and gestures, they integrate multiple modes to highlight the three-dimensional nature of molecules and to show specific characteristics.

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.

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

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.

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.

Along with the fundamental set of experimental data and collision mass spectrometry models, quantum chemistry is used to rationalize and integrate all the data into the understanding of fragmentation reaction mechanisms.

This work presents the rapid expansion of the enzyme market within the chemical and biotechnology sectors, propelled by technological innovation and increasing demand for sustainable industrial solutions.

Small language models (SLMs) were used to create a text database from the 2019 and 2024 Brazilian Chemical Society annual meetings (RASBQs) book of abstracts, enabling a comparison of trends and facilitating statistical analysis. Picture created with the Gemini Chatbot from Google.

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".