Lida Fotouhi

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A simple, rapid and applicable electrochemical method was developed for the determination of ciprofloxacin (Cf) based on a multi-wall carbon nanotubes film-modified glassy carbon electrode (MWCNT/GCE). The constructed electrode (MWCNT/GCE) exhibited excellent electrocatalytic behavior in the oxidation of Cf as evidenced by the enhancement of the oxidation(More)
The electrochemical behavior of the interaction of furazolidone (Fu) with bovine serum albumin (BSA) was investigated by cyclic voltammetry and differential pulse voltammetry at a glassy carbon electrode. Fu shows an irreversible reduction at -0.34 V in pH 4.0 Britton-Robinson buffer (B-R) buffer-10% DMF solution. After the addition of BSA into the Fu(More)
The 4-(dihydroxyphenylthio)-2H-chromen-2-one derivatives have been synthesized by direct electrochemical oxidation of catechols in the presence of 4-mercaptocoumarin as a nucleophile in water/acetonitrile (50/50) solution, in a one-pot process, at carbon rod electrode, in an undivided cell and in constant current conditions, through an EC mechanism. The(More)
In the present study, hollow fiber liquid phase microextraction (HF-LPME) based on pH gradient and electromembrane extraction (EME) coupled with high-performance liquid chromatography (HPLC) was compared for the extraction of ephedrine from biological samples. The influences of fundamental parameters affecting the extraction efficiency of ephedrine were(More)
The interaction of ciprofloxacin (Cf) with double-stranded DNA was studied by cyclic voltammetry, fluorescence emission spectroscopy, and UV-Vis spectroscopy. The presence of DNA results in a decrease in the current and a positive shift in the Cf oxidation peak indicates the intercalative interaction. The corresponding heterogeneous rate constant (k(s)) and(More)
A novel, mixed-valent copper(I)-copper(II) complex, {[bis(ethylene-diamine)copper(II)] bis[diiodocuprate(I)]} (1), has been prepared by electrochemical dissolution of a sacrificial copper anode in a solution of ethylenediamine (en), I2 and tetraethylammoniumperchlorate (TEAP) as supporting electrolyte in acetonitrile (AcN)and characterized by single-crystal(More)
The interactions of sulfadiazine (SD), an antimicrobial drug, with double-stranded calf thymus DNA on the multi-walled carbon nanotubes modified glassy carbon electrode (MWCNT-GCE) have been studied by cyclic voltammetry and UV-vis spectroscopy. In the presence of DNA, the oxidation peak current of SD decreases and the peak potential shifts to a positive(More)
A simple kinetic method is described for the determination of ascorbic acid. The procedure is based on the reduction of toluidine blue with ascorbic acid. The rate of reaction is followed by measuring the decrease in absorbance of toluidine blue (lambda(max) = 600 nm) as a result of its decolorization upon reduction by ascorbic acid. Ascorbic acid in the(More)
In this study the hemoglobin heme degradation upon interaction with sodium dodecyl sulfate (SDS) was investigated using UV-vis and fluorescence spectroscopy, multivariate curve resolution analysis, and chemiluminescence method. Our results showed that heme degradation occurred during interaction of hemoglobin with SDS producing three fluorescent components.(More)
In the present study, extraction of mebendazole across a supported-liquid membrane (SLM) was performed based on two different driving forces: (1) pH gradient over the SLM, and (2) electrical field sustained over the SLM. The extracted drug concentration was studied using reversed-phase HPLC-UV. At passive extraction conditions, mebendazole was extracted(More)