JBCS

We report cobalt(II) complex-modified electrodes in which the effect of substituent groups affects their redox properties. In summary, the nature of -NO₂ group facilitates the reduction of O₂ under the evaluated conditions.

Extraction and identification of compounds from extract polar fractions of Lantana caatingensis by liquid chromatography hyphenated with mass spectrometry and antileishmanial properties.

Workflow diagram of a structure-based virtual screening (SBVS) process showing the two approaches discussed in this work.

Nanostructured materials with humic substances are promising for use in contaminant remediation and adsorption being a fast and efficient technique for use in soil and water.

Machine learning methodologies, particularly XGBoost (extreme gradient boosting), demonstrate superior accuracy in predicting hydrocarbon surface tension, offering potential efficiency improvements in various industrial and laboratory processes.

The advancements in both chemistry and the biological behavior, with a focus on boron neutron capture therapy involving specific polyhedral boron clusters, are examined.

In silico studies inferring para-sulfonato-calix[4]arenes as potent inhibitors against severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2).

This work reviews protein kinase inhibitors of the last 30 years and highlights contributions from Brazilian researchers.

The semiconductor BiVO₄ served as both a support and a precursor for the synthesis of plasmonic metallic bismuth nanoparticles via a mechanochemical one-pot route. The mechanochemical synthesis enhances the charge carriers and the optical properties, making it a valuable approach in various fields such as catalysis.

Inkjet-printed flexible surface-enhanced Raman scattering (SERS) sensors equipped with Au nanostar-based ink marks, a significant advancement in paper-based sensor technology. These sensors exhibit promising potential for the detection of biomolecules, such as the psychoactive N,N-dimethyltryptamine alkaloid, even at ultralow concentrations.

Metallocenes, "half sandwich" M-arenes and metal carbonyls are potential drugs against malaria and neglected diseases caused by trypanosomatid parasites and parasitic helminths.

The image shows the evolution in the usage of Computer-Assisted Drug Design (CADD) methods during the last 30 years.

A bibliographical review of molecular dynamics enhanced sampling techniques for analysis of Plasmodium falciparum proteins and their implications for antibody binding.

Iron oxide nanomaterials were prepared with extract of Camellia sinensis and applied as electrocatalysts in oxygen evolution reaction under alkaline conditions. Overpotential of 460 mV at current density of 10 mA cm^-2 was obtained for the material composed of ferrihydrite.

This article reviews the synthesis and biological activities of the amino-quinazoline privileged structure over the last 30 years, focusing on the last decade.

Schematic presentation of Ag⁺ adsorption experiments. Ag⁺ binding medium, which contains competitive ions and silver ion imprinted (Ag⁺-IIP) nanoparticles. A single Ag⁺ imprinted nanoparticles with tailored cavities for Ag⁺ ions; and adsorption of Ag⁺ ion on the surface by forming a complex with sulfhydryl (-SH) groups.

To promote social benefits for Amazonian communities, we evaluated the use of açaí waste as a source of energy and income.

Green synthesis of ZnO nanoparticles using extracts from the peel and leaf of Plinia cauliflora (jabuticaba) with different morphologies.

Thermal in situ fabrication of silver nanoparticles within a polystyrene-b-poly(2-vinylpyridine) matrix on microcontact-printed patterned glass substrates for application in surface-enhanced Raman spectroscopy (SERS).

The combination of the catalytic activity of layered double hydroxide (LDH) and of the aqueous solution absorption capacity of ureasil polyethylene oxide (U-PEO) emerging as a new insoluble easily recyclable composite solid-reactor against azo-dye contaminants.

Miniaturization of the original QuEChERS (quick, easy, cheap, effective, rugged, and safe) method for extracting pesticide residues from liver tissue of anurans collected in the Baixo Jaguaribe Region, Ceará, Brazil.

N-Doped solids synthesized with different percentages of amino groups and graphitic nitrogen resulted in different CO₂ adsorption capacities, and CO₂ desorption behavior.

Lead-free halide double perovskites have gained importance due to their promising optoelectronic properties and the possibility of forming multiple combinations, which increases their range of applications.

Enhancing the equilibrium between promiscuous and privileged structures in Medicinal Chemistry.

A new analytical method that employs a handheld near-infrared (NIR) spectrophotometer and variable selection using the successive projections algorithm (SPA) for quantitative and qualitative analysis of commercial wheat flour blended with cassava starch.

In this work, we showed the influence of the conductive substrate on the performance of a Co-Prussian blue catalyst towards the water oxidation process in neutral medium conditions.

Advances for sulfate incorporation on titania ceramic foams without impregnation step.

Cashew gum-doxorubicin prodrugs were synthesized via the Schiff base formation reaction. The material showed the ability to self-assembly in water, forming nanoparticles that promoted a release of doxorubicin pH-responsive, antitumor activity against colorectal cancer (HCT-116) and reduced cytotoxicity against non-tumor cells (L929).

Transparent and conductive hydrogels produced with polyvinyl alcohol (PVA), sodium chloride (NaCl) and boric acid (H₃BO₃) were synthesized and used as both electrolytes and separators on aqueous sodium-ion battery devices.

Piperine is a natural amide with an interesting chemical structure and promising activities against several parasitic diseases. It is a renewable natural product easily extracted from black pepper, one of the most important spices used worldwide.

Direct association of the disposable pipette extraction (DPX) technique with tandem mass spectrometry (MS/MS) for the analysis of Aβ peptides (biomarkers for Alzheimer's disease) in cerebrospinal fluid samples.

CO₂ capture by gas absorption in hydroxyl-terminated poly(amidoamine) dendrimers: performance in function of dendrimer generation.

Trypanocidal and leishmanicidal activities of parthenolide and (1R,10R)-epoxiparthenolide, a metabolite found in studies with microsomal fractions.

Synthesis of pure, doped and core@shell oxide nanoparticles through a metalorganic layer-by-layer deposition method applied to porous host matrices, where the fine size control allows property tuning.

Increasing the concentration of Pt precursor, time of synthesis, and size of gold core broadens and redshifts the plasmon band.

The ubiquitous non-zero electric potentials in our world profoundly impact their properties, producing unexpected chemical reactions and other surprising phenomena. So, when and where does the electroneutrality principle which "expresses the fact that all pure substances carry a net charge of zero" actually apply?

Biomass from Oryza sativa (rice) and Musa cavendishii (banana) pre-treated with bio-ionic liquids for nanoscale cellulose production.

Exposure of human milk from different stages of lactation under ultrasonic waves at a given acid concentration and time offers optimization of the derivatization of the triacylglycerol content, making it possible to evaluate the composition of fatty acids.

Magnetic heterogeneous acid catalysts play a pivotal role in enhancing the valorization process of glycerol obtained from biodiesel production.

A bibliometric analysis was performed to map the research performed in Brazil on multicomponent reactions over a period of 30 years through a literature search.

A high-performance liquid chromatography with ultraviolet detector (HPLC UV) method intended for therapeutic drug monitoring of efavirenz, lopinavir and ritonavir, was developed, validated and successfully applied in human immunodeficiency virus (HIV)-infected patients.

Analysis of variance (ANOVA)-simultaneous component analysis (ASCA) models are reported for mixture design Fourier-transform infrared (FTIR), near-infrared (NIR) and UV-Vis spectroscopic fingerprints of a 2² factorial design for the effects of sexual dimorphism and light incidence on the yerba mate metabolome.

A new series of coordination polymers resulting from the interaction of an oxamato ligand with distinct metal ions exhibits photoluminescent properties with remarkable quantum yields.

Nitroaromatic as drug: Food and Drug Administration (FDA) approval, mechanisms of bioactivation, metabolism and toxicity, and synthesis of nitroaromatic fragment by nitration and amine oxidation.

In this study, we utilized molecular network analysis to investigate the metabolome of Diaporthe phaseolorum, providing a valuable tool for expanding the understanding of its chemical constituents.

The total concentration and bioaccessible fractions of metals were determined in berry fruits from different cultivars.

The epoxidation reaction occurred without organic solvents and the system using TiO₂ achieved an epoxide conversion greater than 84.7%.

Dry reforming of methane converts CO₂ and CH₄ into syngas. The calcination at 700 °C results in titanate nanorods. Ni-TNR catalyst enhances CO₂ and CH₄ conversion with low carbon deposition.

Preparation of lignin/TiO₂ composites with Agave sisalana residue applied for bisphenol-A removal. The adsorbent can be used in six cycles, removing over 70% by the third cycle, which indicates good stability.

The image depicts the possible applications of the nanofibers that could involve energy storage and conversion, environmental remediation, and catalysis.

A virtual screening protocol to identify possible Trypanosoma cruzi sterol 14α-demethylase (TcCYP51) inhibitors from U.S. Food and Drug Administration (FDA)-approved drugs using combined computational techniques.

A nanocatalyst by the covalent functionalization of crumpled graphene (CG) with imidazole for degradation of organophosphates (OPs).

Molecularly imprinted polymers applied for the extraction of catechin from jaboticaba peel samples in a semi-automated analytical approach.

The Ugi multicomponent reaction (MCR) involves four components (aldehyde, amine, isocyanide, and carboxylic acid) to form bisamide. In this study, the reaction utilized a carbohydrate, an aromatic amine, a commercial copolymer, and tert-butyl isocyanide.

This graphic illustrates the optimization of a mixed juice formula resulting in an optimal blend with high antioxidant activity.

This account describes the LASSBio Chemical Library diversity and a virtual screening against feline McDonough sarcoma-like tyrosine kinase 3 (FLT3).

In this short review, we present how carbamates can be seen as "good guys" by their use in medicine (hope), or "bad guys", due to their misuse in pesticides and as chemical weapons (death).

A new methodology employs microwave heating for interesterification reactions for biodiesel and triacetin production.

Modified flavonoids were synthesized and showed potent antiproliferative and antiparasitic activity in vitro and in vivo, and antiviral activity in vitro.

Brazilian red propolis from different origins: chemical and mid-infrared spectroscopic characterizations and classification by chemometrics.

Microwave-ultraviolet-visible radiation-assisted synthesis method to produce cobalt-modified 3D ZnO for environmental remediation of emerging pollutants and CO₂ reduction.

Mini review highlighting amidine derivatives: principal synthesis methods and anti-Leishmania activity results.

Lipid images by desorption electrospray ionization mass spectrometry imaging (DESI-MSI) of brains of Wistar rats submitted to total body irradiation (TBI).

Fatty acids composition indicates lower cost vegetable oils as major source of adulteration, and discriminatory analysis using volatile organic compounds (VOCs) showed the presence of adulterant markers in the extra virgin olive oil (EVOO).

Principal components analysis to determine the parameters impact on thionation by Lawesson's reagent and phosphonates.

Five Schiff bases derived from a sulfonamide-containing motif were synthesized and characterized by spectroscopic methods combined with density functional theory (DFT) calculations, and had their crystal structures elucidated. Two compounds showed promising antiviral activity against arboviruses.

A composite material with magnetic and pH-responsive properties, consisting of chitosan/poly(2-diisopropylamino)ethyl methacrylate (Fe₃O₄/SiO₂/CS/PDPA) was developed for application in avermectins adsorption in aqueous medium.

Pesticides extensively used in agriculture show a high potential for contaminating water bodies.

Hydrogel films containing tannic acid (TA) were prepared and characterized by different techniques and the active release was investigated to obtain a suitable material to be applied in skin care routines.

Simple prepared Fe₃O₄:RGO catalysts present high activity for indigo carmine dye photodegradation.

The study investigated the distribution of arsenic and metals in a Brazilian tropical reservoir over time. Elevated element concentrations were found in specific water and sediment zones. The sediment core dated back to 1940 and showed increasing element concentrations, emphasizing the need for ongoing monitoring.

The 1,4-naphthoquinones interact moderately into a positive electrostatic pocket of human serum albumin (site I) via ground-state association.

This critical review encompasses the analysis of studies from 2016 to 2023 that employ the Community Multiscale Air Quality Model (CMAQ) model for ozone simulation.

Dye-modified Nb₂O₅ nanoparticles for photodynamic therapy (PDT).

N-Doped porous biochars produced from corn husks display different CO₂ adsorption capacities, selectivity and isosteric heats.

This article portrays the use of a design of experiments to determine how each experimental condition (pyrolysis temperature, base concentration, and activation temperature) and their correlation would affect the properties of activated carbons (from sugarcane bagasse), produced using a solid-state reaction. The results indicated the successful production of activated carbons of surface areas higher than 1400 m² g^-1.