000			03185cam a2200337 a 4500
003			EG-GiCUC
005			20250223032815.0
008			210914s2021 ua dh f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aM.Sc
099			_aCai01.12.11.M.Sc.2021.Mo.C
100	0		_aMohamed Gamal Abdelkader Hammad
245	1	0	_aComposite materials based on polymers, carbon and nanoparticles for enhancing some chemical reactions / _cMohamed Gamal Abdelkader Hammad ; Supervised Nada Farouk Ahmed Atta , Yousef Mohamed Ahmed
246	1	5	_aمواد مركبة مرتكزة على البلمرات و الكربون و الحبيبات النانونية لتحسين بعض التفاعالت الكيميائية
260			_aCairo : _bMohamed Gamal Abdelkader Hammad , _c2021
300			_a50 P. : _bcharts , facsimiles ; _c25cm
502			_aThesis (M.Sc.) - Cairo University - Faculty of Science - Department of Physical Chemistry
520			_aAnalyses of important biological species, environmental contaminants, and other important analytes are possible using electrochemical sensing. Among the numerous transduction methods, the electrochemical approach has gained the most focus due to their good sensitivity and high selectivity, accuracy, high dynamic range, lower cost, and simplicity. In this work, assaying uric acid in physiological fluid and Nitrite ion in water samples is achieved with high sensitivity and low detection limit. A simple and efficient electrochemical sensor is fabricated for electrochemical sensing of UA in presence of interfering species: epinephrine (Ep) and tyrosine (Ty). The sensor is fabricated by drop-casting a thin layer of CNTs followed by electrodeposition of two successive thin layers of poly(L-methionine) (PMT) and 18-crown-6 (CW) over a glassy carbon (GC) surface; GC/CNT/PMT/CW. Each of the sensor components' unique property contributes in synergism to the current signal enhancement. Voltammetry determination of UA in presence of Ep and Ty in human blood serum in the concentration ranges (0.04 to 40 oM), (0.04 to 40 oM), and (0.08 to 75 oM) is successfully achieved with low detection limits of 2.7 nM, 2.3 nM and 6.3 nM, respectively. Practical application of the GC/CNT/PMT/CWsensor is efficiently assessed in human serum samples for UA determination with acceptable recoveries, excellent anti- interference ability and long-term stability. Electrochemical determination of nitrite in real water samples is achieved using a simple and efficient electrochemical sensor.The sensor is fabricated by electrodeposition of a thin layer of poly(3,4-ethylenedioxythiophene) sandwiched by drop- casting two thin layers of CNTs and iron oxide nanoparticles (Fe3O4) over a GC electrode surface
530			_aIssued also as CD
653		4	_a18-crown{u2013}6
653		4	_aCarbon nanotubes
653		4	_aPoly L-methionine
700	0		_aNada Farouk Ahmed Atta , _eSupervisor
700	0		_aYousef Mohamed Ahmed , _eSupervisor
856			_uhttp://172.23.153.220/th.pdf
905			_aNazla _eRevisor
905			_aShimaa _eCataloger
942			_2ddc _cTH
999			_c82131 _d82131