A novel, simple, signal-enhanced electrochemical sensor was designed for sensitive and selective determination of mercury ions by using target-triggered conformational change of DNA pseudoknots with the assistance of auxiliary DNA strands.

the adsorptive behavior of the immunosuppressive agent tacrolimus was studied by cyclic and differential-pulse voltammetry on a hanging mercury drop electrode (hmde). the drug was accumulated at hmde and two well-defined peak currents were obtained at -1353 and -1417 mv vs . sce (saturated kcl) in borate buffer (ph 10.0) + 0.1 kcl solution. a voltammetric procedure was developed for the determi...

A flow injection analysis (FIA) incorporating a thiosemicarbazone-based coated wire electrode (CWE) was developed method for the determination of mercury(II). A 0.1 M KNO(3) carrier stream with pH between 1 and 5 and flow rate of 1 mL·min(-1) were used as optimum parameters. A linear plot within the concentration range of 5 × 10(-6)–0.1 M Hg(II), slope of 27.8 ± 1 mV per decade and correlation ...

The surface activity of xanthine (Xan) and xanthosine (Xano) at a hanging mercury drop electrode (HMDE) was studied using out-of-phase ac and cyclic dc voltammetry. The results show that Xan and Xano were strongly adsorbed and chemically interacted with the charged mercury surface, which is the prerequisite step for applying the cathodic adsorptive stripping voltammetric determination of such b...

A sensitive method for the determination of pyrethorid cyphenothrin by differential pulse adsorptive stripping voltammetry at a hanging mercury drop electrode (HMDE)(pH6.0) was described. The cyclic voltagramms demonstrate the adsorption of these compounds at the mercury electrode. A symmetric study of the various operational parameters that affect the stripping response was carried out by the ...

Intrauterine methylmercury exposure and prenatal iron deficiency negatively affect offspring's brain development. Since fish is a major source of both methylmercury and iron, occurrence of negative confounding may affect the interpretation of studies concerning cognition. We assessed relationships between methylmercury exposure and iron-status in childbearing females from a population naturally...

N. Burham; S.M.Abdel-Azeem; M. F. El-Shahat, Separation and determination of trace amounts of zinc, lead, cadmium and mercury in tap and qaroun lake water using polyurethane foam functionalized with 4-hydroxytoluene and 4-hydroxyacetophenone,Analytica Chimica Acta 579 (2006) 193–201. Abstract : N. Burham; S.M.Abdel-Azeem; M. F. El-Shahat, Determination of lead and cadmium in tap water and apple...