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Oscillations and accelerations of ice crystal growth rates in microgravity in presence of antifreeze glycoprotein impurity in supercooled water

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Title: Oscillations and accelerations of ice crystal growth rates in microgravity in presence of antifreeze glycoprotein impurity in supercooled water
Authors: Furukawa, Yoshinori Browse this author →KAKEN DB
Nagashima, Ken Browse this author
Nakatsubo, Shun-ichi Browse this author
Yoshizaki, Izumi Browse this author
Tamaru, Haruka Browse this author
Shimaoka, Taro Browse this author
Sone, Takehiko Browse this author
Yokoyama, Etsuro Browse this author
Zepeda, Salvador Browse this author
Terasawa, Takanori Browse this author
Asakawa, Harutoshi Browse this author
Murata, Ken-ichiro Browse this author
Sazaki, Gen Browse this author →KAKEN DB
Issue Date: 6-Mar-2017
Publisher: Nature Publishing Group
Journal Title: Scientific reports
Volume: 7
Start Page: 43157
Publisher DOI: 10.1038/srep43157
Abstract: The free growth of ice crystals in supercooled bulk water containing an impurity of glycoprotein, a bio-macromolecule that functions as 'antifreeze' in living organisms in a subzero environment, was observed under microgravity conditions on the International Space Station. We observed the acceleration and oscillation of the normal growth rates as a result of the interfacial adsorption of these protein molecules, which is a newly discovered impurity effect for crystal growth. As the convection caused by gravity may mitigate or modify this effect, secure observations of this effect were first made possible by continuous measurements of normal growth rates under long-term microgravity condition realized only in the spacecraft. Our findings will lead to a better understanding of a novel kinetic process for growth oscillation in relation to growth promotion due to the adsorption of protein molecules and will shed light on the role that crystal growth kinetics has in the onset of the mysterious antifreeze effect in living organisms, namely, how this protein may prevent fish freezing.
Rights: This work is licensed under a Creative Commons Attribution 4.0 International License.
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 古川 義純

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