Spelling suggestions: "subject:"microelectrode""
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The influence of electrolyte on electrode processes and homogeneous chemical reactionsThompson, Heather January 1998 (has links)
No description available.
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Electrochemical investigation of transient bubble phenomenaDelaplace, Christine January 1999 (has links)
No description available.
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Development of microelectrode techniques for analytical and environmental applicationsAbdelsalam, Mamdouh Elsayed January 2000 (has links)
No description available.
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Applications of ultrasound in electrochemistrySilva-Martinez, Susana January 1997 (has links)
No description available.
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Development of a cell-based drug screening platform : extracellular recording and electrochemical impedance spectroscopy on microelectrode array chipsSörensen, Sören Per January 2007 (has links)
Two established methods, Electrochemical Impedance Spectroscopy (EIS) and extracellular recording, were implemented into a technology platform for non-invasive whole-cell biosensing. Electrical activity of cardiomyocytes and cell-substrate interaction of human ovarian cancer cells was monitored on electrode array chips. The performance of cells inside a microfluidic or closed low volume environment was investigated. Prior to the development of the entire microfluidic platform the two transducing methods were evaluated in single experiments. Processes as cellular attachment and detachment were monitored using EIS and single frequency impedance sensing. Electrodes of different size and structure were employed and compared for their impedance response. It was shown that small electrodes (A = 9·10-6 cm²) are more sensitive to cell-substrate interaction than larger ones (A = 9·10-5 cm²) and that the frequency used for analysis has a profound influence on the sensitivity. Data were modelled using a common equivalent circuit that represents a cell layer on an electrode resulting in an increase of the impedance magnitude by <170 % due to cell attachment. In order to demonstrate the potential of this method for biomedical applications, experiments related to anti-cancer strategies were performed. Cell detachment was induced by addition of synthetic integrin ligands and by hypericin mediated photodynamic therapy and monitored with impedance-based biosensing. Electrical activity of cardiomyocytes cultured on microelectrode arrays was monitored inside a microfluidic system. The chronotropic drug isoproterenol was applied using a robotic dispensing machine, and the resulting changes in spike rate and duration were compared with results gained by experiments with a large scale MEA chip. The experimental findings inspired the development of a technology platform that was finally evaluated by monitoring extracellular signals from myocytes in response to Isoproterenol. Another topic was the comparison of cell-substrate interaction monitored on various electrode structures.
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The determination of rate constants using microelectrodes.Mahon, Peter John, mikewood@deakin.edu.au January 1992 (has links)
An understanding of the rate and the mechanism of reaction is of fundamental importance in the many facets of chemistry. Electrochemical systems are further complicated by the heterogeneous boundary, between the solution and the electrode, that the electron passes through before any electrochemical reaction can take place.
This thesis concerns the development of methods for analysing electrode kinetics. One part involves the further development of the Global Analysis procedure to include electrodes with a spherical geometry which are traditionally the most popular form of electrodes. Simulated data is analysed to ascertain the accuracy of the procedure and then the known artifacts of uncompensated solution resistance and charging current are added to the simulated data so that the effects can be observed. The experimental analysis of 2-methyl-2-nitropropane is undertaken and comparisons are made with the Marcus-Hush electrochemical theories concerning electrode kinetics.
A related section explores procedures for the kinetic analysis of steady state voltammetric data obtained at microdisc electrodes. A method is proposed under the name of Normalised Steady State Voltammetry and is tested using data obtained from a Fast Quasi-Explicit Finite Difference simulation of diffusion to a microdisc electrode.
In a second area of work using microelectrodes, the electrochemical behaviour of compounds of the general formula M(CO)3(η3 - P2P1) where M is either Cr, Mo or W and P2P' is bis(2-diphenylphosphinoethyl)phenylphosphine) is elucidated. The development of instrumentation and mathematical procedures relevant to the measurement and quantitation of these systems is also investigated. The tungsten compound represents the first examples where the 17-electronfac+ and mer+ isomers are of comparable stability.
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Novel applications of carbon nanotubes as micro-electrodesWang, Xiaozhi January 2009 (has links)
No description available.
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Tritium doped polyaniline as a β-irradiation sourceSummerour, Jamie Maddox 08 1900 (has links)
No description available.
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The investigation of diagnostic and analytical microelectrode sensor measurement systems and strategiesMcNaughtan, Arthur January 1998 (has links)
No description available.
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Theoretical modelling of tumour oxygenation and influences on treatment outcome /Toma-Daşu, Iuliana, January 2004 (has links)
Diss. (sammanfattning) Umeå : Univ., 2004. / Härtill 5 uppsatser.
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