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Temperature Dependence and Anisotropic Effects in the Thermal Properties of Hen Egg-White Lysozyme Crystals
Symmetry ( IF 2.940 ) Pub Date : 2020-08-02 , DOI: 10.3390/sym12081279
Syou Maki , Seiji Fujiwara , Seiichi Tanaka , Eka Erzalia , Mizuki Kato , Katsumasa Higo , Yuki Isaka , Ryunosuke Maekawa , Masayuki Hagiwara , Toshiaki Arata

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.

中文翻译:

鸡蛋清溶菌酶晶体热特性的温度依赖性和各向异性效应

我们通过瞬态短热线法测量了四方鸡蛋清溶菌酶 (HEWL) 晶体的热导率 (λ) 和热扩散率 (α)。晶体是通过两种不同的方法生长的:磁悬浮晶体是用超导磁体实现的,其 c 轴垂直定向于导线方向,自然生长的晶体通过双液法实现,随机生长。我们通过测量温度变化和统计分析确认了 λ 和 α 属性的温度依赖性。这些特性根据晶体生长过程中是否存在施加的磁场而略有不同。我们假设这种差异源于磁场引起的晶体取向。
更新日期:2020-08-02
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