论文标题
细菌纤维素的湍流辅助形成
Turbulence-assisted formation of bacterial cellulose
论文作者
论文摘要
细菌纤维素是一类重要的生物材料，可以在良好的实验室和工业条件下生长。纤维素结构受几种生物学，化学和环境因素的影响，包括细菌悬浮液中的流体动力流。在这项工作中，我们探讨了使用良好控制的湍流控制细菌纤维素产生的可能性。导致流体元件随机运动的湍流可能会影响细菌产生的细胞外聚合基质的结构。在这里，我们表明，空气界面处的二维湍流会以明确的尺度和流体元素的随机持续拉伸产生混乱的旋转。结果通过控制湍流参数，为细菌纤维素结构的工程提供了新的方法。
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.
