201 |
Electrochemical Studies of The Interaction Between DNA and a Compound Having Anticancer Properties.Pouliwe, Antibe 17 August 2011 (has links) (PDF)
Electrochemical method has been used to study the interaction between DNA and the compound N-(3',6'-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl)-N'-(2-imidazoyl)urea having anticancer properties. A DNA modified nanometer-sized gold electrode was prepared by surface modification of a bare gold electrode using cysteamine. These electrodes have been characterized using electrochemical techniques and were used to study the interaction between DNA and the compound. Our results showed an increase in the adsorption peak current and a negative shift of E1/2 in the oxidation of ferrocyanide on cysteamine and DNA modified electrodes. For the interaction between the DNA and the compound having anticancer properties, a decrease in peak current of the oxidation of ferrocyanide was observed. The decrease in peak current is attributed to the shielding of the electroactive species by the compound intercalated to the DNA from reaching the electrode surface. Therefore, only few of the electroactive species are able to reach the electrode surface.
|
202 |
Foundational Work in Bioelectrochemical Anaerobic Reactor Design with Electron MediatorsHoeger, Christopher D. 22 March 2013 (has links) (PDF)
Bioelectrical reactors (BER) have potential to be utilized in a wide variety of industrial applications. This work explores the kinetics involved with reduction of electron mediators (anthraquinone disulfonate and methyl viologen) in bioelectrical reactors. It also discusses on possible application of BER technology to produce ethanol from CO2 and electricity. It is established that Clostridium ragdahlei is capable of sustaining life and product formation with CO2 as the only carbon source. This means it is theoretically possible to utilize CO2 as he source of carbon and electricity as the source of reducing equivalents for bacterial growth and product formation. A three-step mechanism composed of adsorption, surface reaction, and desorption is developed to model the reaction of dissolved electron mediators at the electrode surface of the BER. The proposed mechanism is then utilized to build a mathematical model to describe the kinetics of the BER system. This model is used to gain greater understanding of experimental kinetic data of electron mediator reduction at different voltage potentials. It is determined that voltage potential has very small effect on the initial rate of reaction in the reactor. However, thermodynamic equilibrium is affected by the change in voltage, resulting in longer sustained initial rate at higher overpotential. Mathematically, this change affects the modeled rate constants by increasing the reverse rate constant of the rate limiting step, and also by affecting the ratio of the thermodynamic equilibrium constants of adsorption. This results in a larger amount of oxidized electron mediator adsorbed to the electrode surface at higher overpotentials, leading to the initial rate persisting further into experimental runs. One key portion of these findings was the determination that the surface reaction step is the rate limiting step of the kinetic mechanism. This has great ramifications on future research and on future considerations for reactor design. This insight allows for better understanding of the key and fundamental workings of BER technology.
|
203 |
Design of a Double Discharge TEA CO2 LaserMcClare, Robert 11 1900 (has links)
<p> This report deals with the design
of an electrode system which utilizes the double dis-
charge technique to achieve a Uniform discharge between
two continuous electrodes with the intent of using this
electrode system as the excitation unit for a TEA CO2
laser. The particular electrode configuration dealt
with in this report involves a continous cathode and
a similar continuous anode which has a set of rounded
tip, rod, preionization electrodes set into holes in it. Also included in this report is a preliminary measure of the gain of the resultant double discharge
TEA CO2 laser. </p> / Thesis / Master of Science (MSc)
|
204 |
Non-Planar Diamond Electrodes for Biomedical Neural Sensing and StimulatingHalpern, Jeffrey Mark 17 May 2010 (has links)
No description available.
|
205 |
Surface Studies on Diamond Electrodes in Non-Aqueous ElectrolytesSchreiber, Jessica L. 17 May 2010 (has links)
No description available.
|
206 |
EPILEPTIFORM PROPAGATION IN THE HIPPOCAMPUS AND A RECORDING ARRAY SYSTEM FOR IN-VITRO ANALYSISKibler, Andrew B. 09 May 2011 (has links)
No description available.
|
207 |
IMPROVING THE DESIGN AND FABRICATION OF BORON-DOPED DIAMOND-ON-POLYMER IMPLANTABLE MICROELECTRODESHeinert, Carter J. 03 June 2015 (has links)
No description available.
|
208 |
Novel Hybrid Composite Discharge Electrode for Electrostatic PrecipitatorAl-Majali, Yahya T. 12 June 2017 (has links)
No description available.
|
209 |
Prediction of Fundamental Data of Fission Products in Molten Salt and Liquid Electrode for Electrochemical SeparationWang, Yafei 07 September 2017 (has links)
No description available.
|
210 |
THE DEVELOPMENT OF A PORTABLE SPECTROELECTROCHEMICAL SENSORSTEGEMILLER, MICHAEL LEE 11 October 2001 (has links)
No description available.
|
Page generated in 0.0211 seconds