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首页> 外文期刊>Journal of Materials Research >Compressive Testing Of Single Yeast Cells In Liquid Environment Using A Nanoindentation System
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Compressive Testing Of Single Yeast Cells In Liquid Environment Using A Nanoindentation System

机译:使用纳米压痕系统在液体环境中对单酵母细胞进行压缩测试

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摘要

Due to their versatility and accuracy, nanoindentation systems are increasingly used for the characterization of micron-sized particles. Single microbial cells (e.g., yeast cells) can be regarded as micron-sized, liquid-filled biological particles. Applying a nanoindentation system for the compressive testing of those cells offers many options, such as testing in liquid environment. However, diverse experimental problems have to be resolved, especially the visualization of the cells in liquid and the alignment of the surfaces between which the cell is compressed. Single yeast cells were tested using a nanoindenter equipped with a flat punch tip. The deformation behavior of the cells during loading as well as the shape recovery behavior during unloading was investigated. A bursting force was determined as the cell wall was failing at higher deformations. Moreover, the influence of the compression speed on the cell mechanical behavior was characterized.
机译:由于其多功能性和准确性,纳米压痕系统越来越多地用于表征微米级颗粒。单个微生物细胞(例如酵母细胞)可以被认为是微米大小的液体填充的生物颗粒。将纳米压痕系统用于这些细胞的压缩测试提供了许多选择,例如在液体环境中进行测试。然而,必须解决各种实验问题,尤其是液体中细胞的可视化以及细胞在其间被压缩的表面的对准。使用配备有平冲头的纳米压头测试单个酵母细胞。研究了单元在加载过程中的变形行为以及在卸载过程中的形状恢复行为。确定了破裂力,因为细胞壁在较大变形时破裂。此外,表征了压缩速度对细胞力学行为的影响。

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