JBCS

Iron is a very versatile element to produce materials for environmental and technological applications. Iron oxides and composites with Fe⁰ show excellent activities for Fenton reaction and Cr(VI) reduction. Also, iron based magnetic adsorbents, recoverable catalysts and magnetic amphiphilic materials can be produced and used in a wide range of applications

Raloxifene HCl was reduced at hanging mercury dropping electrode (HMDE) in B-R universal buffer at various pH values via 2-electron single cathodic step due to reduction of its C=O group. Two precise linear sweep and square wave adsorptive cathodic stripping voltammetry methods are described for its trace quantitation in tablets and human serum

Emission profiles of carbonyl compounds (CC) in the vapor phase were determined during the charcoal production from eucalyptus. Furfuraldehyde was the most abundant in all burning stages. The concentrations were generally up to five-fold lower at collection points more distant from the kilns than that found near the kilns

Due to its high consumption, the search for quality control of sugar sugar cane is desirable. Therefore, this article presents an alternative method for the simultaneous analysis of contaminants copper and lead in this drink using a carbon paste electrode modified with carbon nanotubes and ascorbic acid

Tetramethylammonium hydroxide and formic acid were used for sample preparation to determine Na and K in meat samples by atomic spectrometric techniques

Herein, it was used vortex assisted ionic liquid-microextraction as a new, simple and rapid method for preconcentration of cadmium and its determination by flame atomic absorption spectrometry

This work compares the volatiles content in certified reference materials (CRM) of active pharmaceutical ingredients (API) determined by loss on drying, Karl Fischer coulometric titration, and sHS-GC-FID, TGA and ATR-NIR-chemometrics

The Eugenia langsdorffii essential oil had pronounced fumigant activity against Tetranychus urticae, higher than the residual contact toxicity. Amongst the leaf oil components assayed, major toxicity was observed for the blend limonene, p-cymene and valencene, which exhibited fumigant property superior to the leaf oil

Atomic force microscopic (AFM) images of a-C:H films synthesized by plasma enhanced chemical deposition process (PECVD) showing that the pressure in the chamber and the acetylene partial pressure in argon influence the morphology

The reaction of 4-alkoxy-3-alken-2-ones with 2-aminoacetophenone to obtain a series of 3-haloacetyl-4-methylquinolines is described for the first time

The distributions of Co, Cr, Cu, Mn, Ni, Pb, Fe and Al were investigated in surface sediments collected at 19 sites in the Sergipe River Hydrographic Basin of Northeast Brazil

Photolysis (UV), peroxidation (H₂O₂), peroxidation combined with ultraviolet light (UV/H₂O₂), Fenton's reagent (H₂O₂/Fe(II)) and photo-Fenton (H₂O₂/Fe(II)/UV) processes were applied for the treatment of stripped sour water from the Replan Oil Refinery (Paulínia City, São Paulo State, Brazil)

The enzymatic resolution of (RS)-sec-butylamine was studied. The reactions were carried out under conventional heating (CH) and microwave (MW) irradiation. Best results were achieved using A. niger lipase immobilized in starch films under MW conditions

This study has demonstrated the successful application of DLLME-GC-FID method for the determination of ecstasy components in urine samples. The experimental results reveal that this method provides low LOD and good linearity

Pareto chart of main effects obtained from 2⁴ full factorial designs. The vertical line defines the 95% confidence interval (A: power, B: temperature, C: time and D: volume of nitric acid)

The objective of this work was to investigate seasonal influences on the interaction of mercury with aquatic humic substances, which are the main natural organic complexation agents

Study area photo showing cotton plantation proximity to the water course. Water movement in the soil was found to influence the pesticide migration on and through soil. Runoff, leaching and wet precipitation were found to be important pathways to the water contamination

Development of analytical methodology and risk assessment of β-blockers contamination by discharge of hospital wastewater in the environment

A two-layered ONIOM approach was employed to study the proton and electron affinities for a group of 50 molecules. The methodology ONIOM2(QCISD(T)/6-311++G(2df,p):HF/6-31g(d))// ONIOM2(B3LYP/6-31g(d):HF/6-31g(d)) provided the best comparison with the experimental data

New derivatives of 2-(substituted phenyl)indan-1,3-diones were predicted by QSAR (quantitative structure-activity relationship) studies, along with empirical parameters. These compounds are potential candidates for new experimental screening studies for reducing serum cholesterol and triglyceride levels

The volatiles emitted by branches from five species of pines were collected by aeration and analyzed by GC-FID and GC-MS. The relative composition of the volatiles was used to perform a discriminating analysis of the pine species

In this work, we developed a method for pulling the capillary tips and methodology for the deposition of metallic films onto glass-based surfaces (borosilicate and fused silica). This was applied to make nanoinjectors for direct injection of samples using MS without a separation the components of the sample