Thermal hysteresis of antifreeze proteins considering Fragilariopsis cylindrus

Thermal hysteresis of antifreeze proteins considering Fragilariopsis cylindrus
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考虑圆柱脆杆藻的抗冻蛋白的热滞后

DOI:
10.1127/algol_stud/2016/0252
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发表时间:
2016
期刊:
Algological Studies
影响因子:
--
通讯作者:
Bayer-Giraldi
Bayer-Giraldi
中科院分区:
--
文献类型:
--
作者:
Kutschan;Bayer-Giraldi

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硅藻种类 Fragilariopsis cylindrus 产生具有中等热滞后的抗冻蛋白 (AFP)。通常使用两个概念来描述热滞后,一方面是由吉布斯-汤姆逊关系描述的不可逆成核生长,另一方面是冰结合蛋白的非线性吸附动力学。我们参考朗道相变理论并预测最大冷冻抑制的 AFP 饱和浓度。推导出来的温度和 AFP 浓度之间的函数关系比热滞实验表明的简单幂律更复杂。 With the parameter set obtained for Fragilariopsis cylindrus the modelled curve is comparable with the often used square root law.
The diatom species Fragilariopsis cylindrus produces antifreeze proteins (AFPs) of moderate thermal hysteresis. Two concepts are often used in order to describe a thermal hysteresis, on the one hand the irreversible nucleation growth described by the Gibbs-Thomson relation and on the other hand a nonlinear adsorption kinetics of the ice-binding proteins. We refer to the Landau’s phase transition theory and predict a saturation concentration of AFPs for the maximal freezing depression. The derived functional relation between temperature and AFP concentration is more complex than a simple power law as suggested by thermal hysteresis experiments. With the parameter set obtained for Fragilariopsis cylindrus the modelled curve is comparable with the often used square root law.
DOI: 10.1111/j.1462-2920.2009.02149.x
发表时间: 2010-04-01
影响因子: 5.1
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