JBCS

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.

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

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

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.

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

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

A multivariate study was carried out on the effect of surface water quality on final public water supply in Belém, Pará, Brazil.

The aim of this work was to evaluate the toxicological conditions of a highly impacted river. This study is necessary to create an analyzing and monitoring model of environmental contamination, in order to prevent pollution in the region.

Residues of antibiotics used in swine production that have maximum residue limits for muscle and kidney established by legislation. These residues are monitored by chromatographic methods and when compliant results (below maximum residue limits) are obtained, the products might be considered safe to consumers.

The synthesized complex undergoes photosubstitution reaction upon irradiation with visible light producing a new complex from which superoxide is generated causing DNA damage.

Gas chromatography procedure for determining and monitoring VFAs in effluents from anaerobic reactors.

The proposed mechanism suggests that cyclometallated Pd(II) complexes can interact with thiols in solution through a series of steps. Overall, this mechanism provides insight into the potential reactivity and selectivity of cyclometallated Pd(II) complexes towards thiols in solution.

Synthesis, characterization, and studies of the cytotoxic and mutagenic activities of Ag(I) complexes with aminoadamantanes are described in this work.

In this work, we evaluated the influence of the steel industry on the people who live around a steel tailing deposit through Ni determination in the air and urine.

Zein NPs (NPZ) and Zein NPs incorporated with eugenol (NPZ-Eug) and clove essential oil (NPZ-OC) were produced by the nanoprecipitation method in the presence of polyvinyl alcohol (PVA) surfactant.

This work sought to develop methodologies for the detection of beauvericin (mycotoxin potentially harmful to the health of consumers) in injured and healthy parts of inoculated fruits using two relevant analytical techniques, due to the urgent need to limit the amount of ingestion.

A charge-assisted hydrogen-bonded organic framework FJU-201 can only crystallize in solutions containing p-xylene, and cannot crystallize in both o-xylene and m-xylene, which can be used for separating and purifying p-xylene from xylene isomers.

The Fenton-photocatalyst method was applied in the treatment of effluent from dairy products, aiming at the removal of COD.

Cashew apple bagasse (CAB) functionalized with divinyl sulfone (DVS) was used to immobilize lipase A from Candida antarctica under optimal conditions, forming the biocatalyst CAB-DVS-CAL-A.

The newly synthesized crystal of 1-(bromomethyl)-3,5-dimethoxybenzene was evaluated as tyrosinase inhibitor via comprehensive in silico investigations.

Chemometric models based on SHS-GC-MS data of Coffea arabica and Coffea canephora var. conilon samples determine the main volatile compounds in the discrimination of these species.

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.

This paper designs a new jet pump and use the BP neural network to optimize its structure.

BiOCl nanosheets modified with AuCu nanoparticles were successfully designed and fabricated for water reduction of CO₂. The Au_xCu_y/BiOCl composites exhibited enhanced visible light absorption ability due to a surface plasmon resonance (SPR) effect. The Au_xCu_y/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.

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.

Peptides obtained from simulated in silico gastrointestinal digestion of quinoa globulins presented both potential ACE and DPP-IV inhibitory properties which were evaluated by molecular docking.

Controlled release hydroxyurea (cancer drug) based on hydrogel swelling mechanism of low-degree cross-linked chitosan. An efficient high-loading capacity scheme with a better-controlled rate of drug release with possible quantified dosage.

The phytochemical study from the roots of Maytenus distichophylla Mart. ex Reissek (Celastraceae) resulted in the isolation of seven sesquiterpene pyridine alkaloids which were subjected to evaluation of their antimicrobial activity.

LCDs can generate ROS under the light-emitting diode light, which kill two pathogenic bacteria, including methicillin-resistant S. aureus and E. coli. LCDs are suitable for wound healing treatments and display great potential in biomedical applications.

Copper ferrite was synthetized, and characterized by XRD, Rietveld method, FT-IR and FESEM. Antimicrobial activity was evaluated by agar diffusion and modified minimum inhibitory concentration. Modified GIC was tested the Vickers microhardness.

Removal of trihalomethanes and purification of water by double filtration.

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

Modern fluorination methods of organic compounds using electrophilic and nucleophilic agents and use of ¹⁹F NMR as a powerful tool for structural elucidation, intermediates identification and reaction monitoring.

A single and fast CE method for quality control of nine different pharmaceutical samples containing hydrochlorothiazide in combination with other active ingredients.

Highly efficient extraction process of lapachol directly from Ipê wood.

A Matlab^® graphical user interface for the design of experiments (DoE) for users unfamiliar with the programming language.

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

Chemometrics and data science are powerful tools for the analysis of chemical data, although they can become highly difficult to execute and analyze owing to a large amount of data. Therefore, free software are strong allies of scientific groups with untapped potential which includes the analysis of data from mixture design experiments.

Chalcone synthesis was conducted by four methods included ecofriendly methodologies, such as absence of solvent and microwave irradiation. The method without solvent showed the best result with a lower time of reaction.

The formative processes on knowledge and reflections gender and sexuality in Chemistry for a way of teaching hormones beyond the binary conception of gender.

A didactic workshop with undergraduate students of the Chemistry course to introduce the theme of PCA through the REDGIM^® app, having the PEA as strategy of teaching and using samples of banknotes and vegetable oils for analysis.

Dipole-dipole interaction between two diethyl ether molecules and the corresponding electrostatic force equation for this interaction.

This work aims to build and characterize dye-sensitized solar cells using low-cost alternative materials and methods, with a focus on undergraduate teaching to stimulate student interest and thereby increase knowledge about the subject.

The Federal Technical Schools in Brazil have evolved over the last century, reaching the Federal Institutes of Science and Technology Education that today offer one vertical education, offer from elementary to postgraduate, including teacher's degree in exact sciences.

The arrows applied in chemistry are fundamental and their symbolism goes beyond a simple representation. This work seeks to propose a reflection on the correct use of arrows, as a representation tool from the point of view of chemical symbolism.

Problem-solving as a possibility for Inclusive Education. Considering the different possibilities of resolutions and representations of scientific knowledge favors respect for the specificities of human development.

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.

The Hirshfeld surface analysis tools available in the CrystalExplorer^® software allow a qualitative and quantitative visualization of non-covalent interactions in related crystalline structures.