JBCS

Development of resveratrol analogs led to most effective compounds against Leishmania sp. and Mycobacterium tuberculosis and less toxic in mammalian cells.

Four new epimericsteroidal saponins have been isolated from Cestrum Laevigatum L. Compounds containing spirostane skeleton exhibited antimicrobial activity against Candida albicans, C.krusei and C. parapsilosis and cytotoxic activity against HCT-116, OVCAR-8, HL-60 and SF-295 cancer cell lines, and the furostanols were inactive.

A hybrid adsorbent was successfully prepared. Cu^II ions were effectively removed from aqueous solutions. All adsorption experimental data were evaluated using kinetic and isotherm models. This material could be used as a reusable adsorbent.

Aldehyde emissions directly increase with the ethanol content in the fuel blend, mainly during the cold phase of the engine.

Bioguided fractionation of an extract of Croton echioides led to the isolation of several indole alkaloids as well as other bioactive compounds.

The dynamic release behavior of Hg⁰ during thermal treatment of bituminous coal under N₂, CO₂ and air atmospheres from room temperature to 1200 ºC.

This paper describes electrochemical properties of sulfonamides (SAs) based on glassy carbon electrode (GCE) modified with carboxyl multiwalled carbon nanotubes (MWCNTs) dispersing in N,N-dimethylfomamide (DMF) media. The DMF/carboxyl/MWCNTs/GCE exhibited excellent electrocatalytic activities, and it was successfully applied to the determination of SAs and real samples.

Herein, both the effect of organic medium and supports were evaluated in the resolution of (R,S)-menthol catalyzed by lipases.

Levels of eleven elements in six different tissues of six fish species of the Todos os Santos Bay (Bahia State, Brazil) were determined by inductively coupled plasma mass spectrometry (ICP-MS) and the results were analyzed by multivariate techniques (principal component analysis (PCA) and hierarchical cluster analysis (HCA)).

Mechanochemical synthesis of cis-2,4-disubstituted tetrahydroquinolines (THQs) using a high speed vibratory ball mill (HSVBM) and phosphomolybdic acid (PMA) as heteropolyacid (HPA) catalyst.

[Ru(bipy)₃]²⁺ doped TiO₂-SiO₂ was used as a new catalyst for degrading synthetic wastewater containing six classes of pesticides.

The composition of the matrix-high turbidity and color, as well as presence of inorganic ions sulfate and chloride-influenced strongly the reaction time and consumption of H₂O₂, being recommended the implementation of a pre-treatment prior the photo-Fenton process.

Mean concentration, in mg kg^-1, according to the part of the plant, A (bark), B (bean), C (bulb), D (flower), E (fruit), F (inflorescence), G (leaves), H (rizome), I (roots), J (seeds), K (shots), and L (whole plant).

The transesterification reaction of triacylglycerides in bio-oils to form methyl esters is catalyzed by a system consisting of KI supported on SiO₂ and γ-Fe₂O₃; the solid catalyst may be thus removed with a magnet, to be reused in subsequent reaction cycles.

Molecular modeling was used to design a molecularly imprinted polymer for the diuretic drug hydrochlorothiazide.

Fragmental method KowWIN is the most successful software to anticipate chromatographic lipophilicity on cholesterol column.

The crystal structures of the 1H-1,2,3-triazole derivatives are reported. The formations of (Z)-arrangements about the C=N bonds in some of the compounds arise from the stabilizing presence of intramolecular N-H···N hydrogen bonds, while in other presence of intramolecular N-H···O hydrogen bonds reinforces the (E) geometry.

Zn²⁺, Cu²⁺, Co²⁺ complex derivatives of azoles synthesized for in vitro antimicrobial activity.

A fast on-line preconcentration method for determination of rare earth elements by ICP OES.

Template-containing Zn/MCM-41 prepared by template ion exchange method is a green, stable, reusable, and convenient catalyst for CO₂ hydration, and produces pure calcite phase CaCO₃.

Catalytic results showed a dependence of the glycerol conversion to acetol with the Cu metal surface and the initial catalytic properties did not depend on the support acidity. The support acidity influenced the stability, since Cu-Al solid deactivated continuously (high carbon deposition) by contrast to Cu-Si sample (low carbon deposition).

In this work, a new methodology is proposed based on digital images taken on a smartphone, using the new PhotoMetrix^® application for the identification of tannins according the source type (chestnut, valonea, quebracho, black wattle, tara and myrobalan).

5'-(4-Alkyl/aryl-1H-1,2,3-triazoles) was prepared under acidic conditions and ultrasound irradiation in just 5 minutes.

This paper is part of the PubliSBQ Special Issue in honor of the late Prof Angelo da Cunha Pinto.

Construction of a complete model of the E. coli resistance-nodulation-division RND-type efflux pump by comparative modeling. The highlighted interface was based on the organization of MacA homododecamer.

A low-cost, one-pot multicomponent domino synthetic route has been developed for the synthesis of 5-(trifluoromethyl)-2-thiazolamine, which was successfully prepared from 3-bromo-1,1,1-trifluoro-2-propanone, phosphorus pentasulfide and cyanamide in the presence of sodium carbonate with the yield of 56%.