Introduction Conclusions References

This work presents a multi-residue analytical method based on solid phase extraction (SPE) followed by high-performance liquid chromatographic (HPLC) with diode array (DAD) detection for the simultaneous determination of a group of pharmaceutical products that include ten antidepressants and three anticancerigenic in environmental samples (water and soil). Baseline separation of the studied com...

The electrochemical oxidation behavior and voltammetric assay of gemifloxacin were investigated using differential-pulse and cyclic voltammetry on a screen-printed carbon electrode. The effects of pH, scan rates, and concentration of the drug on the anodic peak current were studied. Voltammograms of gemifloxacin in Tris-HCl buffer (pH 7.0) exhibited a well-defined single oxidation peak. A diffe...

A new procedure is described for the determination of Hg2+ ions in water samples. Rhodamine based fluorescent sensor was synthesized and experimental conditions were specifically optimized application to environmental samples, which requires low detection limits high selectivity competitive experiments with realistic concentrations other metal ions. Incorporation a Rhodamine-6G fluorophore prev...

We establish functional central limit theorems (FCLTs) for a cumulative input process to a fluid queue from the superposition of independent on-off sources, where the on periods and off periods may have heavy-tailed probability distributions. Variants of these FCLTs hold for cumulative busy time and idle time processes associated with standard queueing models. The heavy-tailed on-period and off...

O estabelecimento de zonas amortecimento tem papel fundamental para o sucesso das Unidades Conservação (UCs), através critérios e normas específicas. trabalho objetivou revisar, analisar discutir os principais utilizados a delimitação no estado Mato Grosso do Sul. Foram adotados procedimentos identificação dos partir consultas bibliográficas aos planos manejo UCs documentos cartográficos. Os re...

Curcumin is the main compound in turmeric and has problems its stability. The analytical method used to determine curcumin levels by using high performance liquid Chromatography (HPLC) Photodiode Array Detector (PDA). HPLC a separation capability good reproducibility with low detection limit. purpose of this research that isolation curcumine determined HPLC-PDA been validated can be applied as ...