Chemical apparatus and process disinfecting – deodorizing – preser – Physical type apparatus – Crystallizer
Patent
1988-02-29
1990-04-24
Straub, Gary P.
Chemical apparatus and process disinfecting, deodorizing, preser
Physical type apparatus
Crystallizer
156600, 156601, 156607, 156DIG62, 156DIG113, 422 50, 422 99, 435313, C30B 3500, C30B 2300, C30B 2954, C30B 702
Patent
active
049198998
ABSTRACT:
This invention relates generally to crystal growth devices, and more particularly to a device in which protein crystals are grown in a hanging drop (12). The drop (12) is suspended from a surface (32) positioned in the interior (21) of an enclosure (18) which is sealably coupled via a valve (56) to a vessel (16) containing solvent used in the drop (12). A second opening in the enclosure (18) is coupled via a valve (54) to a vessel (14) containing a selected desiccant material (44). The valve (56) may be fully or partially opened to add a selected quantity of solvent in a vapor phase to the drop (12), and the valve (54) may be fully or partially opened to cause a selected quantity of solvent to evaporate from the drop (12). The process is monitored by a camera (70), and in conjunction with a graduated pattern superimposed over the drop (12), relative volumes of the drop (12) are determinated. Alternately, the process may be automated by using a computer (94) coupled to servo motors (96, 98, 100), which in turn are coupled to and operate a cap (26) and valves (54, 56), respectively. The computer (94) is responsive to a detection device (92) which detects changes of light passing through the drop (12) from the light source (76).
REFERENCES:
patent: 4263010 (1981-04-01), Randolph
patent: 4755363 (1988-07-01), Fujita et al.
Herren Blair J.
Herrmann Frederick T.
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