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CCD Video Observation of Microgravity Crystallization of Lysozyme and Correlation with Accelerometer DataLysozyme has been crystallized using the ESA Advanced Protein Crystallization Facility onboard the NASA Space Shuttle Orbiter during the IML-2 mission. CCD video monitoring was used to follow the crystallization process and evaluate the growth rate. During the mission some tetragonal crystals were observed moving over distances of up to 200 micrometers. This was correlated with microgravity disturbances caused by firings of vernier jets on the Orbiter. Growth-rate measurement of a stationary crystal (which had nucleated on the growth reactor wall) showed spurts and lulls correlated with an onboard activity; astronaut exercise. The stepped growth rates may be responsible for the residual mosaic block structure seen in crystal mosaicity and topography measurements.
Document ID
19990079781
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Snell, E. H.
(National Research Council)
Boggon, T. J.
(Manchester Univ. United Kingdom)
Helliwell, J. R.
(Manchester Univ. United Kingdom)
Moskowitz, M. E.
(Tal-Cut Co. Cleveland, OH United States)
Nadarajah, A.
(Macromolecular Engineering Lab. Toledo, OH United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1997
Subject Category
Materials Processing
Distribution Limits
Public
Copyright
Other

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