A5040374455- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- Advanced biosensing and bioanalysis techniques
- Analytical chemistry methods development
- Conducting polymers and applications
- Analytical Chemistry and Chromatography
- Biochemical Analysis and Sensing Techniques
- melanin and skin pigmentation
- Analytical Methods in Pharmaceuticals
- CRISPR and Genetic Engineering
- Receptor Mechanisms and Signaling
- Pesticide Residue Analysis and Safety
- Electroconvulsive Therapy Studies
- Potassium and Related Disorders
- Enzyme Catalysis and Immobilization
- Alzheimer's disease research and treatments
- Redox biology and oxidative stress
- Parkinson's Disease Mechanisms and Treatments
- Gastrointestinal Bleeding Diagnosis and Treatment
- Nanopore and Nanochannel Transport Studies
- Molecular Junctions and Nanostructures
- Polyamine Metabolism and Applications
- Neurofibromatosis and Schwannoma Cases
University of Bucharest
2013-2022
Universitatea Nicolae Titulescu din București
2003
Lund University
1998
Western University
1998
Lomonosov Moscow State University
1998
University of Louisville
1991-1992
An amperometric flow system combined with a glucose oxidase-mutarotase reactor was optimized and used to determine aromatic amines phenols using peroxidase-modified graphite electrodes. increase in currents upon injection of the analyzed substrate shown be approximated by Michaelis-Menten type dependence. The detection limit calculated as 3 times noise, sensitivity Imax/K(m)app. Commercially available horseradish peroxidase compared tobacco anionic peanut cationic peroxidases for...
Abstract A method is described of fast spectrometric determination glucose oxidase activity based on enzymatic reduction benzoquinone to hydroquinone and the measurement rate increase hydroquinene absorbance at 290 nm. The deduced from initial rate. rapid sensitive. Key Words: oxidasebenzoquinonespectrometric
A new amperometric biosensor based on cellobiose dehydrogenase (CDH) was created for the detection of ortho- and para-diphenolic compounds. The developed electrode efficiently discriminates between diphenolic monophenolic analyte, a compound, is oxidised surface graphite at an applied potential +300 mV vs. Ag/AgCl. diphenol then regenerated by adsorbed CDH in presence cellobiose, thus allowing amplified response signal. Different parameters CDH–electrode system were optimised, e.g.,...
An enzymatic procedure for the determination of mercury(II) is described, based on inhibition invertase using glucose oxidase and catalase co-immobilised controlled-pore glass (CPG) coupled to a thermometric continuous-flow sensor system follow activity. A small amount (0.66 U ml−1) was incubated short time in sucrose solution 20 μl mixture were injected into enzyme thermistor give temperature change corresponding 100% Addition sample caused decrease activity, that allowed concentrations...
The development of chemical sensors has received a great deal scientific interest in the last decades.Not only industry may benefit from these but also food industry, bio-industry, medicine, environmental control because their capability to give continuously and reversibly selective fast response presence specific compound complex mixture components, without perturbing system.Biosensors combine power analytical detection techniques with specificity biological recognition system therefore...
The influence of addition dsDNA on the electrocatalytic effect carbon matrices, e.g. synthetic monocrystalline diamond, fullerenes C60 and multi-walled nanotubes was studied. Three neurotransmitters: dopamine, epinephrine norepinephrine, which are known as biomarkers that play an important role in transporting modulating nervous impulses synapse were chosen model analytes. Cyclic voltammetry used to determine optimum working conditions with a phosphate buffer solution at pH=4 KNO3 support...
Abstract A simple and rapid voltammetric method based on a disposable electrochemically pretreated screen‐printed carbon electrode is proposed for the determination of L ‐dopa. Under optimum differential pulse voltammetry conditions limit detection 3.6×10 −7 M ‐dopa was obtained. The successfully applied to in commercial pharmaceutical formulation.
Abstract An enzymatic sensor was constructed from an oxygen amperometric on whose surface a dialysis membrane containing covalently bonded catalase set. Immobilization of the enzyme achieved with 2,4-dichloro-6-methoxy-s-triazine, derivative cyanuric chloride, which unlike others its monosubstituted derivatives ensures some advantages. The time measurement is less than 12 sec, for kinetic method initial slope and one minute steady-state method. responds linearly to hydrogen peroxide in...