Thermal convection counter streaming sedimentation method and ap

Details Thermal convection counter streaming sedimentation method and ap Thermal convection counter streaming sedimentation method and ap

1974-11-22

1976-08-24

Lutter, Frank W.

Classifying, separating, and assorting solids

With heat treatment

209158, 209173, 2091117R, 195 18, B03B 500

Patent

active

039761975

ABSTRACT:
A method and apparatus for controlling the sex of mammalian offspring through separation of X-chromosome female producing sperm and Y-chromosome male producing sperm. The separation is accomplished by producing a thermal convection counter stream within a sedimentation column containing a universal medium with sperm suspended therein, and subsequently allowing the two sperm populations to sediment into different fractions according to different densities. The positive and negative geotaxis thus applied to the sperm facilitate a more efficient separation than has been previously obtained. The apparatus used to accomplish this separation includes means for producing a temperature differential between axial and peripheral portions of the medium contained in the sedimentation column thus creating the necessary thermal convection counter stream, and may also comprise a laser capable of scanning the length of the column and laser detecting means to determine the distribution of sperm produced within the medium.

REFERENCES:
patent: 1365815 (1921-01-01), Charlton
patent: 1917156 (1933-07-01), Rauschenbusch et al.
patent: 2379158 (1945-06-01), Kalischer
patent: 2418821 (1947-04-01), Coghill et al.
patent: 3315066 (1967-04-01), Muta et al.
patent: 3826364 (1974-07-01), Bonner et al.
patent: 3869903 (1975-03-01), Beach et al.
patent: 3901660 (1975-08-01), Ohorodnik et al.

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