Turbulence辅助细菌纤维素的形成
Turbulence-assisted formation of bacterial cellulose
摘要：
细菌纤维素是一类重要的生物材料，可以在良好控制的实验室和工业条件下生长。纤维素的结构受多种生物、化学和环境因素的影响，包括细菌悬浮液中的流体动力学流动。在这项工作中，我们探索了使用良好控制的湍流来控制细菌纤维素生产的可能性。导致流体元素随机运动的湍流可影响由细菌产生的细胞外聚合物基质的结构。在这里，我们表明，在空气-液体界面的二维湍流产生混乱的旋转在一个明确的尺度和随机的持续拉伸的流体元素。研究结果为通过控制湍流参数来实现细菌纤维素结构的工程化提供了新的途径。
英文摘要：
Bacterial cellulose is an important class of biomaterials which can be grown in well-controlled laboratory and industrial conditions. The cellulose structure is affected by several biological, chemical and environmental factors, including hydrodynamic flows in bacterial suspensions. In this work, we explore the possibility of using well controlled turbulent flow to control the bacterial cellulose production. Turbulent flows leading to random motion of fluid elements may affect the structure of the extracellular polymeric matrix produced by bacteria. Here we show that two-dimensional turbulence at the air-liquid interface generates chaotic rotation at a well-defined scale and random persistent stretching of the fluid elements. The results offer new approaches to engineering of the bacterial cellulose structure by controlling turbulence parameters.
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