JBCS

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?

In this work, we describe a novel bis-thionaphthoquinone that inhibited cervical cancer cells proliferation and induced deoxyribonucleic acid (DNA) fragmentation. In silico studies suggests that carbonic anhydrase II is a potential target of this compound.

A multiresidue analytical method for quantification of nitroimidazoles, anthelmintics, amphenicols, and dyes in meat, shrimp, and fish was developed using a modified quick, easy, cheap, effective, rugged and safe (QuEChERS)-type extraction and isotope dilution ultra-high performance liquid chromatography coupled with tandem mass spectrometry (UHPLC-MS/MS).

Of the anabolic steroids smuggled in the triple border and seized by the Federal Police, only 22.5% had concentrations equivalent to those labeled.

Multi-molecular infrared spectroscopic combined with multivariate data fusion for quantitative detection of trace hormones.

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.

Methodology for the synthesis of benzopinacolone derivatives from acetophenones in one-pot fashion.

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.

Obtaining natural antioxidant from cashew nut peel (Anacardium occidentale) to reduce oxidation in biodiesel.

Nine compounds of the essential oil from Commiphora leptophloeos leaves were analyzed via an in silico (docking molecular and pharmacokinetic analysis) study against coronavirus disease (COVID-19) (or severe acute respiratory syndrome coronavirus 2, SARS-CoV-2). Thus, COVID-19 M and spike protein showed interaction with β-selinene and bicyclogermacrene. These compounds showed low gastrointestinal absorption and high epithelial absorption.

The graphical abstract represents the analytes being directed to the electrode surface with the mediation of 2-hydroxyethylammonium acetate (2HEAA). It also shows the electrooxidation reactions of nicotine and caffeine with the donation of protons from 2HEAA acting to facilitate the process.

Transforming waste into advanced technology: recycling cobalt ferrite from notebook batteries and iron ore tailing waste for application in photocatalysis under solar radiation and use as an electrochemical ascorbic acid sensor.

This study addresses the use of in silico tools to predict the pharmacological activity of novel chalcones and possible mechanisms of action in Leishmania braziliensis using molecular docking. The molecules proved to be promising.

A simple method for preparing SERS (surface-enhanced Raman scattering) silver films is proposed by electrodeposition in urea-acetamide-LiBr mixtures. These new active substrates have high enhancement factors, of approximately 10⁷, and enable Raman scattering even for diluted solutions (10^-11 mol L^-1).

Molecular networking for compound annotation of Fridericia platyphylla and anticancer properties of extract and isolated compounds.

Selenoacetylenes have diverse biological activities including neuroprotective and life-extending actions in Caenorhabditis elegans.

Ni²⁺ removal from aqueous solutions by poly(acrylic acid) (PAA) and poly(acrylic acid-b-acrylamide (PAA-b-PAm) water-soluble polymeric materials entrapped by a semi-permeable membrane. Ions cross the membrane and get immobilized on the functional groups of the polymers.

The phytochemical investigation of the species Trichilia pseudostipularis resulted in the isolation of four compounds, two of which are new.

The essential oil (EO) extracted from Anemia tomentosa (EOAT) was analyzed through chromatography techniques to identify and quantify its main chemical constituents. Then, methodologies in vitro and in silico were applied to investigate its larvicidal activity.

Design, synthesis and biological activities of novel meta-diamide compounds containing 1,2,4-oxadiazole group.

A novel production of polyurethane materials (PU1 and PU2) from Moringa oleifera oil, emphasizing variations in thermal stability, molecular structure, and mechanical resistance based on the cultivation conditions.

Extraction and pre-concentration of pesticides in river water using graphene oxide (GO)/γ-Fe₂O₃ as a magnetic sorbent and determination by high-performance liquid chromatography-diode array detection.

A green supramolecular microextraction was developed for the analysis of insecticides, fungicides, and herbicides in water and cereal samples and using Analytical GREEnness to assess the environmental friendliness.

Ligand-Based Drug Design (LBDD) and Structure-Based Drug Design (SBDD) techniques merged to evaluate important groups to the fatty acid amide hydrolase (FAAH) inhibitors design.

Extraction of active compounds from jambolan leaf to sunflower seed oil.

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

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.

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

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.

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).

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.

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.

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.

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

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.

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.

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%.