refat.abdelhamid

Refat Abdel-Hamid Mahmoud

Professor - Professor

Faculty of science

Address: معمل الكيمياء الكهربية - الدور الثالث - كلية العلوم (المبنى الجديد) - جامعة سوهاج 82524 - سوهاج

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Professor Abde-Hamid is a Full Professor of Inorganic Chemistry at Sohag University, 1987.

He is the Head of Electroanalytical Chemistry Laboratory.

He is interested in electrochemistry of polyphenol antioxidants.

He was a post doctor dellow for one year at Physical Chemistry Deaprtment, University of Leeds, United Kegdum on 1st July 1982 to 30th JUly 1983.

He was a research vistor for two monthes at Physical Chemistry Department, University of Leeds, UK on 1985.

He was a member of the Scientific Committee for the 1st, , 2nd, 3rd & 4th International conference on Electrochemistry and its Applications Luxor, Egypt on Nov, 1996, Feb, 1999 & Feb, 2001 and Aswan Feb,2004.

He was co-supervisor for the two Ph. D. Thesis with Leeds University, England, 1987 and Technical University, Dresden, Germany, 1996.

He was a supervisor for  six Ph. D. and six master thesis.

He is Vice-Deen for the Post Education and Sintific Studies Affars

He was a member of the Scientific Committee for the promotion of Assistant Professors, "Non-Organic Chemistry Sector" ,2004 to 2008.

He is the Principal Investigator of the "Novel Nano-material Electrochemical Sensors for Poplyphenol Antioxidant: Construction and Analytical Application", ID 5361, Founded from SDTF, صندوق العلو ووالتنمية التكنولوجية بمصر  2014 

 


2018-10-14 16:30:49
المناقشات البحثية
أتشرف أن أعلن لسيادتكم عن وجود حلقات مناقشة بحثية وعلمية خلال يومى الأحد والإثنين من كل أسبوع من الساعه 10 حتى 2 ظهراً بالمكتب بالدور الثالث. Read more

2018-10-14 16:23:33 | Keywords Caffeic acid,
Electrochemical behavior of antioxidants: Part 3. Electrochemical studies of caffeic Acid–DNA interaction and DNA/carbon nanotube biosensor for DNA damage and protection
Multi-walled carbon nanotubes-modified glassy carbon electrode biosensor was used for electrochemical studies of caffeic acid–dsDNA interaction in phosphate buffer solution at pH 2.12. Caffeic acid, CAF, shows a well-defined cyclic voltammetric wave. Its anodic peak current decreases and the peak potential shifts positively on the addition of dsDNA. This behavior was ascribed to an interaction of CAF with dsDNA giving ... Read more

2018-10-14 16:24:43 | Keywords Gallic acid,
Adsorptive Stripping Voltammetric Determination of Gallic Acid Using an Electrochemical Sensor Based on Polyepinephrine/glassy Carbon Electrode and its Determination in Black Tea Sample
An efficient adsorptive stripping voltammetric (AdSV) method for determination of gallic acid, GA, was developed by using an electrochemical sensor based on polyepinephrine/glassy carbon electrode, PEP/GCE. Modification of GCE with PEP was done by electropolymersation of epinephrine, EP, in 0.2 M phosphate buffer solution using cyclic voltammetry, cv. A well-defined redox cv wave of epinephrine in potential range of -0.10 ... Read more

2018-10-14 16:22:12 | Keywords Quercetin,
Electrochemical behaviour of antioxidants: Part 2. Electrochemical oxidation mechanism of quercetin at glassy carbon electrode modified with multi-wall carbon nanotubes
Electrochemical oxidation mechanism of quercetin was investigated at glassy carbon electrode modified with multi-wall carbon nanotubes in aqueous 0.2 M phosphate solutions with different pHs. The investigation was carried out using cyclic voltammetry, double potential step chronoamperometric and chronocoulometric techniques. It was found that the oxidation mechanism proceeds in sequential steps, related with the five-hydroxyl groups in the three aromatic ... Read more

2018-10-14 16:20:34 | Keywords Gallic acid,
Electrochemical behavior of antioxidants: I. Mechanistic study on electrochemical oxidation of gallic acid in aqueous solutions at glassy-carbon electrode
Mechanism of electrochemical oxidation of gallic acid in aqueous phosphate buffer solutions of different pH’s was studied at glassy-carbon electrode. The study was performed using cyclic, convolution–deconvolution sweep voltammetry, chronoamperometry and chronocoulometry. It gives two irreversible diffusion-controlled cyclic voltammetric waves at the entire range of pH. The electrochemical oxidation mechanism was proposed to be an ECEC-first order mechanism in which ... Read more