Results 241 to 250 of about 43,555 (289)

A quantitative assessment of microelectrodes

Ultramicroscopy, 2009
In order to improve the performance and applicability of atom probe tomography, the application of microelectrodes has been suggested and is realized in modern commercial instruments. In contrast to the original proposition by Nishikawa, in practical realization the down scaling of the microelectrode is limited to about 10microm due to the requirements
Ralf, Schlesiger, Guido, Schmitz
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Hydrodynamics with heated microelectrodes

Analytical and Bioanalytical Chemistry, 2004
Voltammetry with continuously heated microelectrodes yields well-defined sigmoidal current-voltage curves. Unlike hydrodynamic electrodes, the surface temperature of a heated electrode can be adjusted arbitrarily within a certain range. Inside a thermal layer, a virtually stagnant diffusion layer of constant thickness delta(diff) exists. delta(diff )is
Peter, Gründler, Andreas, Beckmann
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Microelectrodes in microbial ecology

Analytical Chemistry, 1989
Understanding the microenvironment of bacteria has presented many challenges for the microbial ecologist. Simple intracellular capillary electrodes have been used in neurophysiology since the 1950s to measure action potentials in ion transport over biological membranes, and ion-selective electrodes were developed soon thereafter for the determination ...
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Microelectrodes

Science, 1968
N C, Hebert, M, Lavallée, O, Schanne
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Intracellular Oxygen Microelectrodes

1973
In this presentation the work of many associates of mine will be discussed, most notably Dr. Pankajam Nair. I will say little about the construction of the micro O2 electrode since the method is essentially the same as has been published (7). Rather, I will first briefly discuss tests of its reliability and new calibration techniques; then some of our ...
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Another tungsten microelectrode

Medical & Biological Engineering, 1972
A technique is described for fitting a sharpened tungsten wire and a glass micropipette together so that a precisely controlled amount of bare wire is exposed at the tip. The method is tedious and demanding but produces very reliable electrodes yielding isolated extracellular recordings from single nerve cells and their axons.
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Ca2+-selective microelectrodes

Cell Calcium, 1985
Ca2+-selective microelectrodes based on the synthetic neutral carrier ETH 1001 can be used for quantitative intracellular measurements of resting Ca2+-activities and of slowly changing Ca2+-levels (response time in the order of seconds). Microelectrodes with tip diameters greater than 0.3 micron show selectivities that yield a detection limit between ...
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Recent trends in carbon-based microelectrodes as electrochemical sensors for neurotransmitter detection: A review

TrAC - Trends in Analytical Chemistry, 2022
Donghao Li, Biao Jin, Zhi-Yuan Feng
exaly  

Glass Microelectrodes for pH

1974
The important requirements of an intracellular pH microelectrode are: A. A sharp tip to minimize cell wall damage on penetration. C. A smooth transition between the pH sensing portion and the insulated portion. D. A conical angle as small as possible for the portion of the microelectrode that will be in the cell wall.
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Noise at microelectrodes and microelectrode arrays in amperometry and voltammetry

Analytical Chemistry, 1988
John T. Long, Stephen G. Weber
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