Fact Sheet

Text Size

Crystal growth mechanisms associated with the macromolecules adsorbed at a growing interface - Microgravity effect for self-oscillatory growth - 2 (Ice_Crystal_2)


Overview | Description | Applications | Operations | Results | Publications | Imagery

Experiment Overview

This content was provided by Yoshinori Furukawa, Ph.D., and is maintained in a database by the ISS Program Science Office.

Information provided courtesy of the Japan Aerospace and Exploration Agency (JAXA).
Brief Summary

Ice Crystal-2 examines the growth rates and stability of ice crystals in supercooled water including antifreeze glycoprotein (AFGP). The preferential adsorption of AFGP molecules at the ice/water interface controls the growth of ice crystals. Ice crystal is oscillatory growth interacting with the adsorption of AFGP will be precisely observed in the microgravity environment where gravity-based convection is completely diminished.

Principal Investigator(s)

  • Yoshinori Furukawa, Ph.D., Hokkaido University, Sapporo, Japan
  • Co-Investigator(s)/Collaborator(s)

    Information Pending

    Information Pending

    Sponsoring Space Agency

    Japan Aerospace Exploration Agency (JAXA)

    Sponsoring Organization

    Information Pending

    ISS Expedition Duration:

    September 2011 - March 2013

    Expeditions Assigned


    Previous ISS Missions

    Ice crystal experiment was conducted in Inc18.

    ^ back to top

    Experiment Description

    Research Overview

    • Ice crystal morphologies growing in a supercooled antifreeze protein (AFP) solution are drastically modified from those growing in a supercooled pure water and the self-oscillation of growth is also observed. Based on the results of ground experiments, we proposed a model to explain these phenomena. It is called the 2-step reversible adsorption inhibition model and must be confirmed by careful experiments. The crystal morphology may be strongly be affected by the convection which cannot be prevented under the gravity condition. We can completely prevent this effect and extract the effects of AFP for the ice growth under an ideal microgravity experimental environment in the Kibo of ISS.

    • We will obtain various movie images of ice crystal growth as a function of supercooling temperature and analyze those data to clarify the morphological changes and the time-sequence growth rates.

    • This research project will elucidate the principle of the growth model for ice in the AFP solution, and will open the way for new research field related to the fundamentals of crystal growth mechanisms controlled by the biological macromolecules.


      Information Pending

      ^ back to top


      Space Applications

      Information Pending

      Earth Applications

      Information Pending

      ^ back to top


      Operational Requirements

      Information Pending

      Operational Protocols

      Information Pending

      ^ back to top

      Results/More Information

      ^ back to top

      Related Websites

      ^ back to top


    Information provided by the investigation team to the ISS Program Scientist's Office.
    If updates are needed to the summary please contact JSC-ISS-Program-Science-Group. For other general questions regarding space station research and technology, please feel free to call our help line at 281-244-6187 or e-mail at JSC-ISS-Payloads-Helpline.