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Self-Pressurized Rapid Freezing asCryo-Fixation Method for ElectronMicroscopy and Cryopreservation ofLiving Cells

机译:用于电子镜和卵形冷冻保存的自加压快速冻结Ascryo固定方法

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摘要

Reduction or complete prevention of ice crystal formation during freezing ofbiological specimens is mandatory for two important biological applications:(1) cryopreservation of living cells or tissues for long-term storage, and (2)cryo-fixation for ultrastructural investigations by electron microscopy. Here,a protocol that is fast, easy-to-use, and suitable for both cryo-fixation andcryopreservation is described. Samples are rapidly cooled in tightly sealedmetal tubes of high thermal diffusivity and then plunged into a liquid cryogen.Due to the fast cooling speed and high-pressure buildup internally in theconfined volume of the metal tubes, ice crystal formation is reduced or completelyprevented, resulting in vitrification of the sample. For cryopreservation,however, a similar principle applies to prevent ice crystal formation duringre-warming. A detailed description of procedures for cooling (and re-warming)of biological samples using this technique is provided.
机译:在冻结期间的冰晶形成期间的减少或完全预防是两个重要的生物学应用的强制性:(1)长期储存的活细胞或组织的冷冻保存,和(2)通过电子显微镜进行超微结构研究的冷冻固定。 这里,描述了一种快速,易于使用,适合于冷冻固定和克隆的方案。 在高热扩散率的紧密密封管中迅速冷却样品,然后陷入液体冷冻剂。在内部内部的金属管内部内部内部的快速冷却速度和高压累积,冰晶形成减少或完全普及,导致 样品的玻璃化。 然而,对于冷冻保存,类似的原理适用于防止冰晶形成温暖。 提供了使用该技术的冷却(和再加热)生物样品的步骤的详细描述。

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