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Temperature Dependence and Anisotropic Effects in the Thermal Properties of Hen Egg-White Lysozyme Crystals

1
Institute of Frontier Science and Technology, Okayama University of Science, 1-1 Ridai-cho, Okayama 700-0005, Japan
2
Department of Mechanical Engineering, National Institute of Technology, Akashi College, 679-3 Nishioka, Uozumi-cho, Akashi, Hyogo 674-8501, Japan
3
Center for Advanced High Magnetic Field Science, Graduate School of Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
4
Cell Function Lab., Graduate School of Science, Osaka City University, 3-3-138 Sugimoto Sumiyoshi-ku, Osaka 558-8585, Japan
*
Author to whom correspondence should be addressed.
Symmetry 2020, 12(8), 1279; https://doi.org/10.3390/sym12081279
Received: 17 June 2020 / Revised: 24 July 2020 / Accepted: 24 July 2020 / Published: 2 August 2020
We measured the thermal conductivity (λ) and thermal diffusivity (α) of tetragonal hen egg-white lysozyme (HEWL) crystals by the transient short-hot wire method. The crystals were grown by two different methods: Magnetically levitated crystals were realized with a superconducting magnet, the c-axis of which was perpendicularly orientated in the direction of the wire, and naturally grown crystals realized by the two-liquid method, grown randomly. We confirmed the temperature dependence in both the λ and α properties by measuring the variations in temperature and by statistical analysis. These properties differed slightly depending on the presence or absence of a magnetic field applied during the crystal growth. We hypothesize that the difference originated from the orientation of the crystals caused by the magnetic field. The statistical analyses demonstrated the possibility that asymmetric thermal conduction in the protein crystals provides anisotropic effects of the thermal properties. View Full-Text
Keywords: thermal conductivity; thermal diffusivity; transient hot wire method; magneto-Archimedes effect; temperature dependence thermal conductivity; thermal diffusivity; transient hot wire method; magneto-Archimedes effect; temperature dependence
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MDPI and ACS Style

Maki, S.; Fujiwara, S.; Tanaka, S.; Erzalia, E.; Kato, M.; Higo, K.; Isaka, Y.; Maekawa, R.; Hagiwara, M.; Arata, T. Temperature Dependence and Anisotropic Effects in the Thermal Properties of Hen Egg-White Lysozyme Crystals. Symmetry 2020, 12, 1279. https://doi.org/10.3390/sym12081279

AMA Style

Maki S, Fujiwara S, Tanaka S, Erzalia E, Kato M, Higo K, Isaka Y, Maekawa R, Hagiwara M, Arata T. Temperature Dependence and Anisotropic Effects in the Thermal Properties of Hen Egg-White Lysozyme Crystals. Symmetry. 2020; 12(8):1279. https://doi.org/10.3390/sym12081279

Chicago/Turabian Style

Maki, Syou, Seiji Fujiwara, Seiichi Tanaka, Eka Erzalia, Mizuki Kato, Katsumasa Higo, Yuki Isaka, Ryunosuke Maekawa, Masayuki Hagiwara, and Toshiaki Arata. 2020. "Temperature Dependence and Anisotropic Effects in the Thermal Properties of Hen Egg-White Lysozyme Crystals" Symmetry 12, no. 8: 1279. https://doi.org/10.3390/sym12081279

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