Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Erosion
Patent
1979-11-23
1981-11-03
Tokar, Michael J.
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
Erosion
73432PS, G01N 2700
Patent
active
042988365
ABSTRACT:
Apparatus and method wherein particles in a liquid stream are hydrodynamically focused to pass through an impedance sensing orifice, a low frequency current source provides a current through the orifice to produce a signal representative of the particle's size, a high frequency source provides a current through the orifice to produce a signal representative of the particle's size and internal resistance, a detector determines the particle's length, and a digital computer correlates the signals for each particle and calculates its shape factor, degree of deformation or natural shape, true volume and internal resistivity.
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Kay et al., "Imaging in Flow", Jour. of Histochemistry and Cytochemistry, vol. 27, No. 1, pp. 329-334.
Kachel et al., "Fast Imaging in Flow: A Means of Combining Flow-Cytometry and Image Analysis", Journal of Histochemistry and Cytochemistry, vol. 27, No. 1, pp. 335-341, 1979.
Coulter Wallace H.
Groves Michael R.
Coulter Electronics Inc.
Newton William A.
Tokar Michael J.
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