JBCS

Crotalaria juncea and Crotalaria ochroleuca were cultivated in vitro and the extracts from the callus exhibited high toxicity against Meloidogyne javanica. This effect could be phenolic compounds, alkaloids and flavonoids contents identified in these extracts.

Determination of bisphenol A in urine samples using automated solid-phase extraction followed by liquid chromatography-tandem mass spectroscopy (LC-MS/MS) analysis.

The synthesis of two poly(lactic acid)-b-poly(ethylene glycol) (PLA-b-PEG) block copolymers using the Ugi multicomponent reaction is described. Folic acid and fluorescein frameworks were introduced as targeting and fluorescent marker aiming further application in the controlled release of drugs for cancer therapy.

This study presents the synthesis of acridone derivatives and their evaluation as photosystem II inhibitors and herbicides. Among the tested compounds, acridin-9(10H)-one demonstrated the best photosystem II (PSII) inhibition, while 2-chloroacridin-9(10H)-one and 9(10H)-acridone-4-carboxylic acid exhibited herbicidal activity against Amaranthus species. Molecular docking analysis indicated that carbonyl groups and aromatic substituents are essential for ligand interactions, providing insights for designing new bioactive scaffolds.

Application of glycerol as a fuel in conventional and biological (enzymatic and microbial) fuel cells, and their main products.

Despite the absence of toxic metals, the solvents used on vape products, glycerin and propylene glycol, show toxicity in yeast and cardio myoblast cell model. Propylene glycol presented the highest levels of toxicity indicating its use should be approached with caution or avoided.

The formation of buffalo lactoferrin (Bf-LF)-amoxicillin opens possibilities to investigate the potential of this combinations against bacteria pathogens.

Isolation and characterization of Siparuna cymosa leaf compounds. 3-(4,5-Dimethyl-2-thyazolyl)-2,5-diphenyl-tetrazoliumbromide (MTT) assay against leukemia cell line.

Evaluation of chemodiversity, antioxidant and antiglycant activities of Spondias tuberosa leaves during different stages of plant development.

Detection method of higenamine in food and urine and metabolism study.

The conformation of polymer chains in solution and interactions with additional components can be studied computationally to improve electrospinning parameters.

Antimicrobial and antibiofilm activities of the essential oil from the inflorescence of Etlingera elatior (Zingiberaceae) and its main constituents (dodecanal and 1-dodecanol).

This study developed a simple, fast and low-cost method for the quantification of total phenolic content (TPC) in extra virgin olive oil samples (EVOOs), using an optimized colorimetric reaction with the Folin-Ciocalteu reagent and the acquisition of digital images with a smartphone.

Study of the lipid quality and cytokines interleukin-10 (IL-10) and transforming growth factor-beta 1 (TGF-β1) of ice cream containing human milk.

2,5-Diketopiperazine-derived quinazolinones are key structures in fumiquinazoline alkaloids, known by their pyrazino[1,2-b]quinazoline-3,6-dione framework and notable biological activities. In this study, we synthesized 19 novel fumiquinazoline-like analogs, divided into three series (A, B, and C), with a modified pyrazino-pyrido-pyrimidinone core, offering potential for further biological research.

The use of gas chromatography and mass spectrometry techniques is a powerful tool for determining and differentiating the lipid profiles of vegetable oil food supplements.

Nisin-loaded polyethylene oxide (PEO) nanofibers with antibacterial activity against Staphylococcus aureus and Bacillus subtilis were developed via green electrospinning.

Ships can be a potential source of polycyclic aromatic compounds and particulate matter in the atmosphere of the city of Rio de Janeiro.

Is there a developed method to analyze whether or not this food is organic?

Machine learning and multivariate statistical analyses identified molecular features correlated with biological activity of phenylpropanoid against Trypanosoma cruzi.

Residual biomass from the Legal Amazon was used in a slow pyrolysis process. The biochars showed potential for carbon sequestration and contaminant adsorption, while bio-oils, containing phenols and furans, could serve as raw materials in the chemical industry.

This study explores 3D printable resin blends with terpene additives, yielding fifteen formulations. These resins hold promise for drug delivery and the fabrication of biomedical devices.

The synthesis, antileishmanial assay, and in silico analysis of twenty 2-hydroxy-3-(1,2,3-triazolyl)propyl vanillin derivatives are reported.

Acyl pyrenes as models for asphaltene aggregation.

Twenty three thiophene[2,3-d]pyrimidine derivatives were synthesized by a 3-step reaction, and the bioactivity of the synthesized compounds was evaluated by breast cancer cell MDA-MB-231.

Experimental steps: adsorption of the dyes used (methylene blue (MB) and methyl orange (MO)) present in the solution in thermoplastic starch films (TPS) and TPS/kraft lignin (TPS-KL) (a), followed by desorption of the dyes present in the films in water (b), and subsequent remediation with exposure to photodegradation of the dyes desorbed in water (c).

The Brazilian pitanga fruits exhibited volatile compounds such as esters, terpenes and aldehydes, with β-elemene, E-germacrene and ethyl acetate being the most abundant. Additionally, 124 polar and non-polar metabolites were identified, notably including fatty acids, sugars and terpenes, which possess potential health-promoting effects.

The study aimed to degrade ammonia nitrogen and organic matter in effluent generated at a port terminal used for fertilizer storage. The results indicated removal of 99.99% of N-NH₃ and 75.60% of total organic carbon (TOC).

MALDI(+)TOF MS (matrix-assisted laser-desorption and ionization time-of-flight mass spectrometry) for the rapid detection of cocaine (COC), benzoylecgonine (BZE), and ecgonine methyl ester (EME) in hair strands.

Efficient production of citronellyl esters through esterification and transesterification catalyzed by Novozym^®435 via linear acylating agents (C3-C18) with kinetic modelling, product isolation and reuse of the biocatalyst.

Four potential selective monoamine oxidase B (MAO-B) inhibitors were identified by screening compounds in the chemical space of molecular databases using in silico techniques.

Double calcium iron phosphate [Ca₉Fe(PO₄)₇] obtained from chicken eggshell.

Chemical interactions of chitosan and cellulose-nanofiber/chitosan films with silver nanoparticles investigated through surface-enhanced Raman scattering (SERS) spectroscopy.

The gold(III) Schiff base complex reduces the expression of the AKT1 gene, leading to an increase in the expression of the apoptosis-promoting gene Bak1. In contrast, cisplatin increases the expression of the AKT1 gene, followed by an increase in the anti-apoptotic Bclx gene, resulting in treatment resistance.

New fluorophore naphthoxazoles were synthesized from lapachol and investigated for their potential application as deoxyribonucleic acid (DNA) fluorescent probes.

Development of a nanoemulsion based on kefiran and coriander essential oil to stabilize the essential oil compounds and preserve their antimicrobial properties to increase the stability of ricotta cheese.

We present a collector-detector device for the electrochemical analysis of explosives in post-explosion residues fabricated by a desktop 3D printer and a conductive filament made of recycled polylactic acid (PLA), carbon black and graphite.

We developed a rapid and efficient thin-layer chromatography method for detecting homoisoflavones in Polygonatum odoratum (Mill.) Druce, which exhibits extremely high sensitivity, specificity, and stability.

This work consists of proposing simple and selective routes for chitosan-based blends with fish collagen and Aloe vera exudate.

Aqueous extracts of Hymenaea courbaril are effective corrosion inhibitors, especially the fractions from the leaves and fruit pulp due to their higher content of phenolics.

This study proposes a method for the simultaneous determination of 31 phenolic compounds by hydrophilic interaction chromatography coupled with triple quadrupole mass spectrometry (HILIC-MS/MS) and its application in residues from the beverage industry.

Development and validation of lisdexamfetamine using liquid chromatography-tandem mass spectrometry (LC-MS/MS) system applied for pharmacokinetic studies.

CO₂ adsorption on nanocomposite pollen-derived carbons.

Levan produced by Gluconobacter cerinus was structurally characterized and evaluated for its antioxidant activity.

A novel deep eutectic solvent has excellent extraction effect on hesperidin, due to its strong dissolving capacity, easy formation of
H-bonds and van der Waals forces with hesperidin.

New thio-functionalized resins have the capacity for the confinement of gold nanoparticles and the catalytic reduction of nitro aromatics.

The chemical profile of Artemisia lancea essential oil detected by gas chromatography-mass spectrometry (GC-MS) and its allelopathic influence on seedling growth of Amaranthus retroflexus and Setaria viridis.

Immobilization of an extracellular fructosyltransferase from Aspergillus oryzae IPT-301 on alkali-treated corncob particles for fructooligosaccharide production.

Thermodynamic study of the immobilization of bioactive compounds from the extract of jabuticaba peel powder (JPP) in cellulose extracted from sweet sorghum bagasse forming the adsorbent-bioactive complex (ABC).

A novel nanocomposite of biochar and maghemite was prepared and characterized to investigate its efficacy in the competitive adsorption of endocrine disruptors from aqueous media.

The study analyzes the combination of frontier orbitals of aniline and dodecylbenzene sulfonic acid structures, using the density functional theory (DFT) B3LYP-6/311+G* method, whose result indicates the formation of anilinium-DBS (dodecylbenzene sulfonate) salt.

Keywords map of the most frequently encountered terms in articles regarding the use of silver nanoparticles as antimicrobial agents between 2014 and 2023.

A new alkaloid and other compounds were isolated from Justicia wasshauseniana and characterized by high-resolution electrospray ionization mass spectrometry (HRESIMS) and nuclear magnetic resonance (NMR). The stereochemistry was confirmed by circular dichroism (CD) and time-dependent density functional theory (TD-DFT).

Scheme of the solid-liquid extraction with low-temperature partitioning (SLE/LTP) technique for extracting pesticides of green tea leaves and analysis by gas chromatography coupled to mass spectrometry (GC-MS).

Chemical constituents and evaluation of antioxidant and antimicrobial activities of Combretum lanceolatum twigs.

Steel mills produce metallic waste that can be reused in the synthesis of magnetic nanoparticles with forensic application, restoring serial numbers.

The N-β-acetyltryptamine from Aspergillus spp can be a potential insecticidal agent against the Aedes aegypti vector.

Identification of fatty acids and 1-hydroxy-3,7-dimethoxyxanthone in Bredemeyera brevifolia extracts. Its methanolic extract demonstrated in vitro antifungal potential on clinical samples and American Type Culture Collection (ATCC). The in silico test indicated potential for CYP 51 inhibition, especially for xanthone.

Visualization of the last frame from 100 ns of molecular dynamic simulations between the complex of receptor-binding domain (RBD) protein and neutralization of the dimeric antibody IgA (PDB ID: 6UE7). This antibody class showed the greatest potential for neutralizing spike protein with binding affinity of -199.120 kcal mol^-1.

Imidazole-derived ionic liquid-functionalized poly (butylene adipate co-terephthalate) / poly (lactic acid) (PBAT/PLA) blend composites and montmorillonites have shown promise for improving polymer blend thermal and mechanical properties.

A novel SiO₂/PAMAM-G3 nanocomposite is crafted for efficient extraction and sensitive detection of benzoylurea insecticide residues in tea infusions. The dendrimer-functionalized silica nanoparticles exhibit superior adsorption capacity and selectivity, enabling robust analysis down to trace levels. This green, versatile approach opens up new avenues for food safety monitoring.

The unconventional Brazilian Brosimum gaudichaudii fruits, rich in primary and secondary metabolites, vitamins A and C, offer health benefits. This study highlights their potential in the food industry, suggesting new preparation and consumption methods, aiming to reintroduce this unconventional Brazilian fruit into popular culture for its quality and health benefits.

Comparison of the extraction of bioactive compounds from the by-product of cupuaçu seed by microwave-assisted extraction (MAE) and high pressure/temperature extraction (HPTE), using the Box-Behnken 3³ factorial design. Both extraction techniques proved viable for polyphenol recovery in cupuaçu seed by-product, with multi-response optimization indicating ideal conditions, achieving a 48% recovery of (‒)-epicatechin.

A new fluorescent platform based on calixarene derivative and metal-organic framework (MOF) was synthesized and used as fluorescent probe for cation sensing.

The metabolites of four macroalgae species from sandstone reefs on the Brazilian tropical coast were characterized. Red algae had the highest concentrations of carbohydrates, protein, and lipids and most of the metabolites.