Contact Versus Immersion Freezing of Freely Suspended Droplets by Bacterial Ice Nuclei

Contact Versus Immersion Freezing of Freely Suspended Droplets by Bacterial Ice Nuclei
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接触与细菌冰核自由悬浮液滴的浸没冷冻

DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
S. Yankofsky
S. Yankofsky
中科院分区：
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文献类型：
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作者：
Z. Levin;S. Yankofsky

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摘要在风洞气流中自由悬浮的液滴与专用细菌细胞在接触或浸没模式下成核。浸泡冻结似乎给出了一个不连续的频率分布的冻结与温度，而相应的曲线接触是单调的。虽然后一种成核模式的效率高出0.02 °C，但通过任何一种成核模式冻结的液滴的温度范围都比迄今为止公布的自然起源的非生物冰核更接近0°C。
Abstract Droplets freely suspended in the air stream of a wind tunnel were nucleated with dedicated bacterial cells in either the contact or immersion mode. Immersion freezing seemed to give a noncontinuous frequency distribution of freezing with temperature whereas the corresponding curve for contact was monotonic. Although the latter nucleation mode was more efficient by ∼2°C, the temperature ranges over which droplets froze by either mode of nucleation were closer to 0°C than those so far published for nonbiogenic ice nuclei of natural origin.