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DOI: 10.3791/50857-v
Please note that some of the translations on this page are AI generated. Click here for the English version.
本文显示了基于接种在细菌生物膜和专用磁镊子的发展原位测量由微生物在接口内置的复杂生命的物质的局部机械特性的磁性粒子的远程致动的原始方法。
以下实验的总体目标是在 C 中以微米尺度对细菌生物膜的局部物理特性进行两次测量。为此,将磁性颗粒引入不断增长的生物膜中,作为可以远程启动而不会干扰生物膜结构特性的探针。然后使用专用的磁镊对每个颗粒施加规定的力。
在嵌入生物膜中,使用视频显微镜监测由磁拉引起的颗粒位移,以推导出局部粘弹性参数并提供生物膜机械性能的 3D 空间分布。获得的结果显示了大肠杆菌生物膜的机械异质性,并提供了关于哪些生物膜成分支持生物膜物理特性的线索。因此,与显微镜、生物学或整个生物植被等现有方法相比,该技术的主要优点是它可以原位报告机械性能的空间分布,而不会干扰材料的原始结构。
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