JBCS

The history of using continuum sources for absorption measurements started in the 1860s; it was re-discovered in the 1960s and first instruments became available early this century. The literature about features and recent applications is reviewed.

Tungsten oxide thin films were obtained by thermal evaporation under reduced oxygen pressure. The composition of the films, structuring mode and crystalline lattice were investigated. Resistance to leaching and performance as photocatalyst were also evaluated in this work.

This study concerns glycerol electrooxidation in single alkaline direct glycerol fuel cell (ADGFC). In situ ATR-FTIR analyses were performed for the Pd/C and PdAu/C electrocatalysts at different atomic ratios, identifying oxalate, glycerate ion, 1,3-dihydroxy-2-propanone, glyceraldehyde and glycolate as major products of glycerol electrooxidation.

This work shows that NMR-based metabonomics on the chemical composition of biofluids can be a valuable tool to evaluate tumour onset and its progress. Through chemometric analysis of ¹H NMR spectra from serum it was possible to diagnose tumours in mice as well as to recognize the biomarkers indicative of the disease.

Fast, nondestructive and clean characterization of toxic and allergenic elements in jewelry by EDXRF.

In the title compound, [Hg (C₁₄H₁₃N₄O₃)₂], the central Hg atom is six-coordinated by two tridentate triazenide ligands through two N and one O atoms. Spectrophotometric study of complex formation between this ligand and Hg²⁺ in DMF solution indicated a large stability constant for the mercury ion complex.

Using a novel luminol-Ag(III) complex chemiluminescence system for determination of uric acid was presented. Possible reaction mechanisms for the CL system were suggested based on the UV absorption spectra, CL spectra, and the free radical trapping experiment.

The fluorescent and solvatochromic properties of coumarin and its derivatives were studied to understand the excited state behavior of the molecule in solvent mixtures.

The catalytic activity of NbCl₅ was tested in a solvent-free Diels-Alder reaction with furan. Good yields were obtained in the catalyzed reaction using methyl acrylate as the dienophile. We achieved higher exo adduct rates in furan reactions with 2-chloro-acrilonitrile.

Transition-metal-free annulations of 1,1-bis(thiomethyl)-2-nitroethylene with hydroxyalkylamines or alkyldiamines providing imidazolidines, oxazolidines and benzoxazoles have been reported. These compounds were evaluated as acetylcholinesterase inhibitors by using an enzyme immobilized capillary reactor-tandem mass spectrometry.

Aluminum phthalocyanine hydroxide is important in various fields. However, their high hydrophobicity promotes the aggregation in aqueous media. Studies have shown that aggregation process is complex in water/ethanol mixtures.

A micro-flow-batch analyzer (µFBA) using webcam for spectrophotometer determination of ortho-phosphate and aluminium(III) in tap water is proposed.

Flavonoid glycosides were isolated from the leaves of Hosta longipes and they showed moderate anti-neuroinflammatory activity by suppressing the release of NO in LPS-stimulated microglial cells and by inducing NGF secretion in C6 glioma cells.

Simultaneous determination of several active ingredients in less than 1 minute by capillary electrophoresis with capacitively coupled contactless conductivity detection (CE-C⁴D).

This adsorptive character of the molecule was used to develop a new fully validated, rapid, selective and simple diferential pulse cathodic adsortive stripping voltammeric (DPCAdSV) method for the direct determination of OLME.

Surface binding detection for cysteamine-biotin-streptavidin system using a plasmonic sensor based on nanoparticle multilayer films.

Effects of R groups at the para and ortho position on the aromatic ring of 2,2'-arylmethylene-bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-ones) determined by three-dimensional structure and conformational analysis using NMR and molecular modeling.

A hydrophobic and anti-corrosion coating on aluminum substrates, including organic nanoparticles with vegetable oil, carnauba wax and latex, having a water contact angle of 109°.

Novel application of BiFE for the determination of the calcium-channel blocker diltiazem by square wave cathodic voltammetry in human urine and pharmaceuticals (phosphate buffer; pH 7.4; 0.25 mol L^-1).

A non-destructive NIR spectrometric method is proposed for cultivar discrimination of castor seeds resulting from breeding programs.

This paper proposes a very convenient route for the preparation of primary and secondary alkyl bromides from alcohols under neutral conditions.

Seven new pyrazolyl benzenesulfonamide derivatives were prepared and evaluated against Leishmania amazonensis.