JBCS

Physicochemical properties of gliadin (one of gluten proteins) has been investigated in three solvents and pH (9.8, 6.8, and 1.2) by dynamic light scattering (DLS), zeta potential (ZP), and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR).

Vegetable and animal tissues were digested using microwave-assisted digestion with diluted nitric acid solutions. Different rotors and vessels were tested: the single reaction chamber (SRC) technology, MAXI 44 and SK-15. It was demonstrated that different configurations of vessels critically influence digestion performance despite using the same heating program.

Virtual screening of selenides, synthesis of the selected compounds and in vitro tests against Leishmania amazonensis, showing their potential as new anti-leishmanial drugs.

The presence of triphenylmethane dyes and its residues in aquaculture products is of great concern for human health. Thus, an ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) method to monitor them was validated.

Copper (II) showed higher affinity by diethyldithiocarbamate (Et₂DTC) ligand than by N,N,N,N'-tetrakis (2-pyridilmethyl) ethylenediamine (TPEN) and triethylenetetramine (TRIEN) ligands, following the order Et₂DTC > TPEN > TRIEN. The energy for the interaction of the species is shown for the first time and coincide with the experimental data. In the spectrum shown, the TPEN ligand is replaced by the Et₂DTC ligand, with the scheme proposed in this work.

Correlation among solubility parameter (δ) of the solvent media, δ of the asphaltenes molecules that precipitates and amount of asphaltenes that precipitates.

This study describes the stereoselective synthesis of two new γ-lactones, 3 and 15, in 6 and 3 steps and 19 and 32% yield, respectively, directed toward the total synthesis of the natural product (−)-cleistenolide.

Virtual screening was employed to identify potential human target proteins for soybean isoflavones in order to elucidate alternative biological mechanisms that explain some effects of these chemicals.

A new device for detecting streptavidin based on dual transduction is shown. Localized surface plasmon resonance and electrochemical impedance spectroscopy techniques were used to evaluate the analyte on the same transducer (gold nanoparticles-coated indium thin oxide (ITO)).

Bioflavonoids from Platonia insignis fruit residues (seeds and shell) were identified. The ethyl acetate shell extract showed important in vitro and in vivo bioactivities, besides the selective extraction of the biflavonoid morelloflavone.

This article aims to analyze the interaction between cucurbit[6]uril with cocaine and adulterants through different computational methodologies for forensic purposes.

Fractions of three different microalgae biomasses were extracted using three solvents (n-hexane, n-hexane + isopropanol, methanol + chloroform). Each extract was pyrolyzed under inert atmosphere at 600 ºC, in presence of transition alumina. The products were analyzed by gas chromatography-mass spectrometry (GC-MS). Pyrograms obtained show deoxygenated molecules in the kerosene range.

A fully validated gas chromatographic method for the quantification of minor alkaloids in cocaine provides a tool to strength forensic chemistry and law enforcement reports, providing meaningful scientific based information to the Justice system.

Reduced graphene oxide sheet decorated with tiny cadmium sulfide quantum dots was synthesized and used as a high capacity adsorbent for adsorption and preconcentration of the analytes.

Multi-flow calibration and two-flow calibration are non-traditional calibration strategies based on the obtaining of the analytical signals at different nebulization gas flow rates and applied for the first time in argon plasma-based techniques.

A new [5]helicene-based fluorescence sensor exhibited good ability to determine Au³⁺ in aqueous solution and real samples.

The comparison between CdTe quantum dots (QD) synthesized in water and in the binary solvent (water + glycerin) via one-pot approach was studied. By using the binary solvent and the molar ratio 1:1.5 of Cd:TGA (thioglycolic acid), a narrow photoluminescence band and significantly enhanced photoluminescence quantum yield (ɸ𝑓) was observed.

By combining the spiropentadiene structural motif and carbon atoms with sp³ hybridization we propose the existence of a new carbon allotrope, called ABF-Carbon.

Four tropical climate agro-industrial wastes were converted into cellulose nanofibers (CNF) exploring a moderate temperature and pressure chemical process.

The nitro group reduction mechanism from nitrofurazone and its nitro radical formation, besides stability and kinetics parameters, were determined in ionic liquids by electrochemical techniques.

Fourteen new 3-alkyl-5-trifluoromethyl-1H-pyrazol-1-(thio)carboxamides and fourteen 2-(3-alkyl-5-trifluoromethyl-1H-pyrazol-1-yl)-thiazoles derivatives were planned and synthesized. The new compounds were obtained through the cyclization reactions, and were evaluated in vitro for antimicrobial activity.

After some post-synthetic improvements, the use of arsenic triiodide as an air-stable precursor for the preparation of some As^III compounds is presented. A homologous series of trialkylarsines from As(Me)₃ to As(Bu)₃ was obtained and analyzed with two-dimensional chromatography coupled with time of flight mass spectrometry (GC x GC-TOFMS).