JBCS

Chemically reduced graphene oxide on Au gold electrodes obtained from recordable CDs as a novel, low-cost and sensitive sensing platform.

New chiral molecules were prepared with good yields starting from (R)-limonene, a cheap and abundant substrate.

A gas chromatography-mass spectrometry (GC-MS) method was optimized to determine ω-3 and ω-6 fatty acids in supplements of fish oil; concentration values were compared to those informed by manufacturers.

The image represents the origin of bagasse of sugarcane, extraction of carbohydrates from bagasse and carbohydrates analysis using the glassy carbon electrode modified with multi-walled carbon nanotubes containing cobalt oxide nanoparticles (GCE/MWCNT/CoOOH) electrode coupled to high-performance liquid chromatography (HPLC) with reverse pulsed amperometric detection for the production of second generation ethanol.

A high-performance liquid chromatography (HPLC) method was developed and validated to simultaneously determine curcumin and melatonin in hyaluronic acid-coated nanoemulsions.

New isatin derivatives were synthesized and their GSK-3β inhibition abilities were determined.

Efficient and recyclable AuPt/SrCO₃ catalyst for oxidation of benzyl alcohol that maintains its physical-chemical properties after catalytic runs.

Thunbergia laurifolia leaves extracts exhibited good ability to trap Pb²⁺ in aqueous solution.

A new compound minutifloroside and three known compounds isolated from Palicourea minutiflora.

Kinetics of lumefantrine thermal decomposition described by neural network and isoconversional method.

Do Brazilian national air quality standards (NAQS) meet the main goal of protecting public health?

Complexes with formula: [Ru(L-L)₂(dppb)]PF₆, L-L = mercapto-ligands, dppb = 1,4-bis(diphenylphosphino)butane, were synthesized. In vitro cell culture experiments showed cytotoxic activity of the complexes against breast, lung, prostate and liver tumor cells.

A bar adsorptive microextraction (BAµE) method followed by large volume injection-gas chromatography coupled to mass spectrometry (LVI-GC-MS) analysis was developed to analyze endosulfan isomers in teas and yerba mate infusions. The method provided selectivity for these pesticides. Limits of detections (LOD), limits of quantification (LOQ) and recoveries were comparable to reported techniques. LOQs were lower than the maximum residue levels (MRLs) established for endosulfan.

Synthesis and application of a new phenolic-Schiff base as antioxidant for biodiesel and corrosion inhibitor for carbon steel.

Pioneer work based on a factorial design to optimize the Ce³⁺-based metal-organic framework (MOF)-76 synthesis.

Potential for biosorption and evaluation of secondary metabolism profile of Aspergillus sp. in potato dextrose (PD) medium enriched with CuSO₄.5H₂O and Pb(NO₃)₂.

In this work, the suitability of continuous sample drop flow microextraction gas chromatography-flame ionization detector (CSDF-ME-GC-FID) is studied on the extraction and evaluation of methadone and codeine in plasma sample. This method is simple, fast and consuming low amount of organic solvent. CSDF-ME is performed without hand intervention.

Au@SiO₂/TiO₂ core-shell structure particles were fabricated by ethanol reflux. The particles showed excellent photocatalysis activity for the degradation of methyl orange.

7α-Hydroxyroyleanone gave an unexpected product on dehydration reaction. A naphtoquinone was formed as major product along with 6,7-dehydroroyleanone and a complex mixture of compounds. The reaction products were purified by high-speed countercurrent chromatography and tested for their anti-Leishmania activity.

Brazil nut samples were subjected to subcritical n-propane extraction using a 2³ factorial design and the chemical composition of the oil was determined and compared to the oils obtained by conventional extraction methods.

Camphor is a chiral bicyclic ketone that exhibits an exceptionally high anisotropic dissymmetry factor (g-factor). It was observed accordance between the calculated value, at time-dependent density functional theory (TD-DFT) level of theory, and the experimental result, −0.09 and −0.05, respectively. This process is associated with n → π* (highest occupied molecular orbital-lowest unoccupied molecular orbital (HOMO-LUMO)) electronic transition.

A methodology was developed for improved separation and detection of polychlorinated biphenyls (PCBs) in Fuller's earth, in a relatively short time, with high chromatographic resolution and selectivity. A total of 83 PCBs could be identified using a single chromatography method.