JBCS

Carbon nanotubes/polyaniline thin films as electrochemical sensor have improved sensitivity and limits of detection when compared to neat materials films.

The mass transfer during champignon mushroom salting was modeled by the finite element method (FEM).

C1 Cabernet Sauvignon grapes provided the best sensory attributes among 5 vineyards located across Campanha Gaúcha and they were correlated to volatiles, as well as phenolic compounds using gas chromatography (GC) and GC × GC-MS (two-dimensional GC with mass spectrometry), GC-O-Osme (GC-olfactometry-Osme technique), DA (descriptive analysis), LC-DAD-FLD (liquid chromatography-diode array detector-fluorescence detector) and to favorable climate/soil characteristics.

The bean pod (Vigna unguiculata) was submitted to pyrolysis, and its bio-oil chemical composition was evaluated.

Formaldehyde and acetaldehyde were determined in the ambient air of gas stations and human health risks for workers exposed to these compounds were estimated.

A method of digestion with dilute nitric acid was optimized by mixture design for the extraction of elements in the seed, peel, and pulp of Casearia fasciculata. Chemometrics tools such as principal component analysis and hierarchical cluster analysis were efficient in the formation of groups, corresponding to the fruit parts.

The matrix components affected directly the operational conditions of heterogeneous photocatalysis, the rate constants and removal efficiency of the pharmaceuticals (gemfibrozil, hydrochlorothiazide and naproxen), and toxicity.

Novel β-carbolines with oxazoline and dihydrooxazine groups at C-3 showed significant activity against Leishmania amazonensis, causing strong stiffness in the parasite plasma membrane.

Cloud point extraction procedure for Cu and Cd determination in petroleum produced-formation water samples using graphite furnace atomic absorption spectrometry (GF AAS).

Chromatograms obtained for benznidazole after acid, alkaline, oxidative and photolytic condition.

The figure illustrates the procedure for sampling of PM₁₀ (particulate matter with diameters lower than 10 µm) and PM_2.5 (particulate matter with diameters lower than 2.5 µm) in Rio Claro emphasizing the vicinity of the city to a big ceramic industry pole. Furthermore, the synchrotron radiation X-ray fluorescence technique is illustrated as the method for analyzing the elemental content of particulate matter (PM) together with graphics indicating the used statistical tests for the characterization and source apportionment of PM.

Infant formula sample chromatograms without and with pre-treatment by packed-fiber solid-phase extraction (PFSPE) were compared.

The present work studied the aqueous total extract of castor beans as a natural inhibitor of the corrosion of mild steel in 1 M HCl using gravimetric and electrochemical tests, besides surface analysis by scanning electron microscopy.

Selenium-derivative reduces selectively hypochlorous acid in a very fast kinetic constant and presents no cytotoxicity toward health cells.

The copper ions presented a strong catalytic action; rosemary extract delayed the oxidative process and copper ions caused Arrhenius deviations in the biodiesel oxidative process.

New 9H-fluorenes-1,2,3-triazoles were obtained by Suzuki coupling followed by Friedel-Crafts alkylation reaction though α-hydroxy-1,2,3-triazoles prepared by click chemistry between propargylic alcohols and aryl azides. Only α-hydroxy-1,2,3-triazole 9b was active (half maximal inhibitory concentration (IC₅₀) = 8.0 µM) as GlyT1 inhibitor.

Influence of growth temperature of the TiO₂ films on the methyl orange dye degradation, and schematic representation of the photocatalytic behavior on the methyl orange dye degradation under UV light for different TiO₂ film thickness. The diagram also demonstrates the electron-hole recombination in this condition.

Design and synthesis of novel heterocyclic amine-azachalcones analogues by molecular hybridization of chalcone scaffold with fragments of isoniazid, fluoroquinolones and linezolid, and antitubercular activity against H37Rv strain was evaluated.

The food exportation requires certificates of analysis. An example is the toxic elements content in pineapple, and it should be controlled by appropriate analytical methods.

A successful composite semiconductor was obtained by pyrolysis of the TiO₂ and chitosan polymer with high photocatalytic activity to degrade emerging pollutants. The synthesis was quite simple and the photocatalytic activity was improved due to the ballistic effect by the interaction between TiO₂ and graphene-like structure prevenient from chitosan structure.

Concentrations of pesticides in the atmosphere and risk assessment for the human health.

A series of thiocarbamoyl-3,5-diaryl-4,5-dihydro-1H-pyrazoles were synthesized and their potential as fingermarks developers was evaluated.