JBCS

The ultrasound-assisted oxysulfonylation of alkenes using sodium salts of organosulfinic acids under air atmosphere in a chemo- and regioselective way is described. The β-keto-sulfones were obtained in good yields as major products.

A rhodium-catalyzed alkylation reaction of indoles with N-Boc-imines has been developed via C−H activation to afford a series of biological important 2-indolylmethanamine derivatives with good functional group tolerance and high yields.

The effect of a cafeteria diet (chocolate, peanut and biscuit) on the composition of fatty acids in zebrafish fillets was evaluated by gas chromatography.

Optimization of sample preparation based on extraction with diluted acids assisted by ultrasound and microwave for nutrients elements determination.

Computational calculations (density-functional theory, DFT) of Q-band involved molecular orbitals in phthalocyanines and naphthalocyanines with similar structures.

Facile synthesis of pyrazoline derivatives and their luminescence properties. Theoretical calculations at time-dependent density functional theory (TD-DFT) level explain the electronic behavior.

Glycerol was reacted first with acetic acid to synthesize monoacetin. Then monoacetin and residual glycerol were reacted with acetone to obtain 62% solketalacetin, 30% solketal, and 8% diacetin.

Chelating agent free-solid phase extractor (CAF-SPE) based on new SiO₂/Al₂O₃/SnO₂ for online Pb²⁺ preconcentration.

A voltammetric method is proposed by a simple electrodeposition of reduced graphene oxide on glassy carbon electrode. The modified electrode showed a 20-fold increase in analyte signal compared to unmodified electrode.

Environmental parameters, nutrients, plant characteristics, data on farming methods were correlated with N,N-dimethyltryptamine, determined by gas chromatography coupled to mass spectrometry (GC-MS).

Twelve [Pt(PPh₃)₂(acylthiourea)]PF₆ complexes was synthesized and evaluated against Mycobacterium tuberculosis and human tumor cells.

Oxidative potential of PM_2.5 as predictive indicator of adverse health effects.

We proposed a fast, low-cost, microscale fluorescence-based screening methodology for PET degrading microorganisms with selective detection of the terephthalic acid monomer produced during the microbial hydrolysis.

Kavalactones and benzoic acid derivatives from Piper fuligineum shows dichotomous biosynthetic pathways and shikimic acid is a common precursor of this two different classes.

The air quality indexes (AQIs) determined in Rio de Janeiro from July to September 2016, before and during the Summer Olympic and Paralympic Games, in four monitoring stations, were compiled and analyzed.

Glycosylated 2-aryl-5-amidinobenzimidazoles were synthesized, characterized and showed antifungal and antibacterial potential against different strains.

Ten phenolic compounds were isolated from leaves of Poincianella pluviosa (Fabaceae). Among the major compounds, ellagic acid was the most active against Plasmodium falciparum (W2).

Gas chromatography-mass spectrometry (GC-MS) identification of ethyl and t-butyl glyceryl ethers.

Quantification of fatty acid methyl or ethyl esters obtained from soybean oil and comparison of analytical methodologies applied to biodiesel samples.

Copolymerization via ring-opening metathesis polymerization (ROMP) under air atmosphere of norbornene (NBE) and its ester-dicarboxylic derivate with Ru-catalyst.

Ionic liquid-dispersive liquid-liquid microextraction (IL-DLLME) was successfully used for the extraction of the pesticides and pharmaceuticals and personal care products (PPCPs) in water.

Scheme of the proposed UV mediated cotton bleaching process with H₂O₂, evaluated by colorimetry and tensile test.