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Growth rate measurements of lysozyme crystals under microgravity conditions by laser interferometry
Izumi Yoshizaki1, Katsuo Tsukamoto, Tomoya Yamazaki
1Japan Aerospace Exploration Agency (JAXA), 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan.
Abstract:
The growth rate vs. supersaturation of a lysozyme crystal was successfully measured in situ together with the crystal surface observation and the concentration measurements onboard the International Space Station. A Michelson-type interferometer and a Mach-Zehnder interferometer were, respectively, employed for real-time growth rate measurements and concentration field measurements. The hardware development, sample preparation, operation, and analysis methods are described.
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