Porous passage means and method for particle analyzing systems

Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Particle counting

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G01N 2700

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044343981

ABSTRACT:
A method of and means for controlling orientation of particles through a sensing zone in a particle analyzing system, which facilitates particle shape determination, comprises laminar flow orientation of the particles in a stream moving through an elongate straight passage coaxially aligned with an elongate sensing zone longer than the longest particle to be sensed and analyzed. The particles are carried through the sensing zone in an isokinetic laminar flow sheath of fluid.

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Spielman et al., "Improving Resolution . . . by Hydrodynamic Focusing", Journal of Colloid and Interface Science 26, 1968, pp. 175-182.
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Thom, R., Vergleichende Untersuchungen zur Electronischen Zellvolumen-Analyse, Telefunken Chap. 6)-Translation Nov. 1976.

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