JBCS

Eugenol is a convenient starting material or building block for the synthesis of structurally, biologically or technologically relevant compounds and natural products, and a suitable precursor for fine chemicals synthesis.

3-Methyl-2-benzothiazolinone hydrazone condensed with some selected aldehydes to give the corresponding Schiff bases, which cyclize with thioglycolic acid to afford the respective thiazolidenones.

The schematic diagram of separation thiamphenicol (TAP) in polyoxyethylene lauryl ether (POELE10)-(NH₄)₂SO₄ aqueous two-phase system (ATPS).

A width of adsorption voltammetric peak (δ) may be a key to interactions in the adsorption layer, defined by interaction parameter G.

Cu(II) stearate complex was synthesized by the slow-release of Cu²⁺ ion from the electrochemical oxidation of a Cu anode with stearic acid. Different values of applied voltages (1, 5 and 10 V) were used during the synthesis to study the effect of applied voltage on the particle size and morphology of the complex.

The liquid chromatography-time of flight/mass spectrometry (LC-TOF/MS) method was developed and validated to quantify and monitor pharmaceuticals water samples. Ten pharmaceuticals were detected in water samples (surface water, sewage treatment plants and hospital waste) by using LC-TOF/MS instrument.

Structural changes of humic acids (HAs) extracted from Amazonian soils were studied using fluorescence emission-excitation matrix (EEM) combined with parallel factor analysis (CP/PARAFAC). This combination enabled the identification and quantification of two fluorophores associated with HAs.

Slogan and objective of the present recovery process development for the dysprosium and neodymium separation from permanent magnets scraps leach liquors.

Two new alkaloids were isolated from the aerial parts of Margaritopsis carrascoana, along with known calycosidine and hodgkinsine.

The model of bidentate binding was employed to describe equilibria of metal chlorides adsorption by silica with grafted 1-n-propyl-3-methylimidazolium chloride. The model takes into account the fixation of metal species as tri- and tetrachlorometallate anions detained near the surface as counterions and also the dissociation and auto-complexation equilibria of metal chlorides in solutions.

The solvent terminated-auxiliary solvent-dispersive liquid-liquid microextraction (ST-AS-DLLME) technique was combined with microvolume UV-Vis spectrophotometry avoiding centrifugation and simplifying the operation. The extraction optimization was performed based on design of experiment (DOE) methods.

An ion imprinted polymer is synthesized and applied for selective extraction of silver from different aqueous samples. The silver content is determined using the flame atomic absorption spectrometry (FAAS) and spectrophotometry based on silver localized surface plasmon resonance peak (LSPRP).

Chlorobenzoic acids are persistent pollutants in the environment, adversely affecting the flora and fauna. In this work, the photocatalytic decomposition of 2-, 3- and 4- chlorobenzoic acids with TiO₂ loaded on HZSM-11 zeolite was investigated. We report the use of zeolite-supported TiO₂, which can be easily removed and is a very efficient and reusable photocatalyst.

This work describes an efficient method for the synthesis of chalcones in glycerin and antifungal and antibacterial assays for these molecules.

A simple and fast method for Al, As, Ba, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Se, and Zn determination in tea and herbal beverages using direct analysis by inductively coupled plasma mass spectrometry (ICP-MS) was developed.

Antibacterial classification functions based on the topological molecular computer design-computer aided ''rational'' drug design (TOMOCOMD-CARDD) bilinear indices are presented. These models were built using the linear discriminant analysis (LDA) method over compounds dataset of 2230 molecular structures.

Cocaine samples seized in Brazilian Federal District between 2010 and 2013 were analyzed by the Federal Police chemical profiling program (PeQui project). Cocaine purity, degree of oxidation and pharmaceutical products used as cutting agents were determined by gas chromatography-flame ionization detector (GC-FID) analysis. A new adulterant was identified and routinely quantified (aminopyrine) and a mass balance approach was discussed.

Seven compounds were appointed by chemometric analysis of two dimensional gas chromatography data as the most discriminating between anise and fennel. These compounds were used to verify the use of fennel instead of anise (as described in label) in personal care products.

Chitosan has been cross-linked covalently and ionically with different oxocarbons and pseudo-oxocarbons and characterised using vibrational (Raman and infrared) spectroscopy, thermogravimetry and nuclear magnetic resonance spectroscopy.

The contributions of domestic and industrial discharges in the common wastewater system and seasonal variations were investigated by ¹H nuclear magnetic resonance (NMR) coupled to multivariate statistical analysis to monitor the sewage treatment operations.

Hydrazones, derived from hydrazinopyridines, are compounds capable of undergoing reversible configurational changes and to coordinate metal centers exhibiting in each of those states different electronic and optical properties.

Carbon quantum dot with bright blue photoluminescence was synthesized from raw cashew gum using novel and fast microwave-assisted procedure.

Influence of seasonal variations in water isotopic patterns on isotopic fingerprints of ethanol and correlations with sugarcane biomass.

Microscopic lignin and cellulose image chemical analysis in Mahogany and Eucalyptus by Raman spectroscopy and multivariate curve resolution.

A series of novel 2-(pyrazol-1-yl)pyrimidine derivatives was easily obtained under ultrasonic conditions.