Dependence of membrane capacitance estimates on measurement method

Membrane capacitance measurements revisited: dependence of capacitance value on measurement method in nonisopotential neurons.

During growth or degeneration neuronal surface area can change dramatically. Measurements of membrane protein concentration, as in ion channel or ionic conductance density, are often normalized by membrane capacitance, which is proportional to the surface area, to express changes independently from cell surface variations. Several electrophysiological protocols are used to measure cell capacita...

Frequency Dependence of Capacitance Measurement for Advanced Gate Dielectrics

1. Introduction Capacitance-voltage (C-V) measurements are a fundamental characterization technique for MOS devices. However, as the oxide thickness is reduced and gate dielectrics comprised of stacks of novel materials are employed, CV measurement and analysis are made more complex by the frequency-dependence of the measured capacitance. This paper presents an analysis of the sources of the fr...

Development of Capacitance Void Fraction Measurement Method for BWR Test

Dependence of vibrotactile thresholds on the psychophysical measurement method.

OBJECTIVES To investigate the dependence of vibrotactile thresholds on the psychophysical method used in the diagnosis of neurological dysfunction caused by exposure to hand-transmitted vibration. To compare thresholds obtained with (a) 'continuously variable' versus intermittent 'staircase' stimulation using 'yes-no' responses, and (b) 'yes-no' and 'forced-choice' responses using intermittent ...

Capacitance Level Measurement Basics

In the four previous parts of this series of articles, level measurement using a floating system, using pressure instruments, using radar waves and using ultrasonic waves were discussed. The instruments offered by Indumart company applicable for each method were also recommended. In the final part of this article, level measurement using capacitance, conductivity probes, vibration forks, therma...