Microemulsões de água em óleo de soja (w/o ME) foram preparadas com dodecil sulfato de sódio (SDS) como surfactante e com os álcoois amílico ou isoamílico, como co-surfactantes. A composição 40,0% de óleo, 43,2% de álcool, 10,8% de SDS e 6,0% de água, em massa, na razão 1:4 [SDS]:[álcool], apresentou a maior estabilidade termodinâmica. O tamanho das gotículas e seu coeficiente de difusão nas mi...

The redox processes of quercetin in acidic medium (pH 1.8) were investigated on a graphite-wax electrode by cyclic voltammetry, potential-controlled UV/Vis spectra and derivative cyclic voltabsorptometry. A long-optical-path thin-layer cell was used for the spectroelectrochemical measurements. A stable quinonic product with a united conjugated structure was found to form at the first anodic pea...

Hybrid composites of polypyrrole (PPy) and silver vanadium oxide (SVO) used for lithium primary batteries were chemically synthesized by an xidative polymerization of pyrrole monomer on the SVO surface in an acidic medium. The composite electrode exhibited higher discharge capacity nd better rate capability as compared with the pristine SVO electrode. The improvement in electrochemical performa...

This work examines the use of new hydrophobic ionic liquid derivatives, namely octadecylammonium tosylate (ODA-TS) and oleylammonium tosylate (OA-TS) for corrosion protection of steel in 1 M hydrochloric acid solution. Their chemical structures were determined from NMR analyses. The surface activity characteristics of the prepared ODA-TS and OA-TS were evaluated from conductance, surface tensio...

Electrochemical behaviour of fluoroquinolone Antibiotic drug, moxifloxacin hydrochloride has been studied in aqueous medium using DC polarography and cyclic voltammetry. Moxifloxacin exhibits single well-defined cathodic peak in all the buffers like acetate buffer, phosphate buffer and B.R.buffer. The characteristics of the peak have been examined at different concentrations, pH and scan rates....

Investigations on the effectiveness and inhibitory activity of isolated flavonoid (Rutin) from Spermacoce hispida plants against corrosion metal in a 1M HCl acidic solution include mass loss analysis, potentiostatic curves, electrochemical methods. Plant extracts have been found to exhibit excellent properties metals different environments. The base metal's ability stop improves when green inhi...