We developed a multiplex enzyme-based electrochemical genosensor for sequence-specific detection of multiplex linear-after-the-exponential-PCR amplicons that targeted toxigenic Vibrio cholerae O1 and O139 using novel screen-printed gold electrode bisensors.

The chronocoulometric detection of DNA was carried out based on circular strand-replacement DNA polymerization on a screen-printed electrode, and extended to quantify tumor cells with the aid of aptamer recognition.

A disposable, screen-printed electrode based on the immobilization of catalase or tyrosinase was developed to construct biosensors for the amperometric determination of azide. The determination principles for azide by these two methods are based on inhibiting the enzymatic consumption of an electrode-detectable substance (hydrogen peroxide or catechol) on an enzyme-immobilized electrode. Both o...

A simple biosensor, based on a tyrosinase-immobilized electrode, was developed for a rapid and quantitative measurement of bovine serum albumin (BSA) and human serum albumin (HSA). Tyrosinase, immobilized on a screen-printed carbon electrode, catalyzed the oxidation of tyrosine residues in the albumin to the corresponding quinone, which was further reduced electrochemically by the sensing elect...

This work reports the use of modified screen-printed carbon electrodes (SPCEs) for identification three drugs abuse and two habitual cutting agents, caffeine paracetamol, combining voltammetric sensing chemometrics. In order to achieve this goal, codeine, heroin morphine were subjected Square Wave Voltammetry (SWV) at pH 7, in elucidate their electrochemical fingerprints. The optimized SPCEs el...

This work describes a novel L-lactate biosensor based on the immobilization of dehydrogenase enzyme screen-printed electrode modified with ternary composite gold nanoparticles, electrochemically-reduced graphene oxide, and poly (allylamine hydrochloride). The was stabilized by crosslinking glutaraldehyde. Applied working potential, pH NAD+ concentration were optimized. reports specific sensitiv...

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...

Functional electrical stimulation (FES) activates nerves using electrical currents, and is widely used in medical applications to assist movement of patients with central nervous system lesions. The recent emergence of small electrode arrays enables greater muscle selectivity and reduces fatigue compared to the use of traditional large electrodes; however existing fabrication techniques are exp...

Voltammetric sensor using a symmetrical derivative of anthrone3 (1,7-diamino-3,9-dibutyl benzo[1,2,3-de:4,5,6-d’e’]diquinoline-2,8(3H,9H)-dione) (SPE-A) has been developed as probe for Hg(II) ions. Performance the screen-printed electrode modified with receptor compared in solution phase, 1:1 water-acetonitrile solvent system. Anthrone3 displayed an electrochemically quasi-reversible nature vol...