Key Laboratory for Mechanics in Fluid Solid Coupling System, Institute of Mechanics, Chinese Academy of Sciences, No.15 Beisihuanxi Road, Beijing 100190, China; High School Affiliated to Renmin University of China, Beijing 100080, China.
Key Laboratory for Mechanics in Fluid Solid Coupling System, Institute of Mechanics, Chinese Academy of Sciences, No.15 Beisihuanxi Road, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China.
Ultrason Sonochem. 2019 Jul;55:359-368. doi: 10.1016/j.ultsonch.2018.10.001. Epub 2018 Oct 4.
A theoretical model for estimating inactivation effects on marine Vibrio sp. is developed from the viewpoint of the chemical action of the OH radicals induced by interaction of bubbles with shock waves. It consists of a biological probability model for cell viability and a bubble dynamic model for its collapsing motion due to the shock pressures. The biological probability model is built by defining a sterilized space of the OH radicals. To determine the radius of the sterilized space, the Herring equation is solved in the bubble dynamic model in consideration of the effect of the heat conductivity and mass transportation. Furthermore, the pressure waveform of incident shock wave used in the model is obtained with the pressure measurement. On the other hand, a bio-experiment of marine Vibrio sp. is carried out using a high-voltage power supply in a cylindrical water chamber. Finally, the viability ratio of marine bacteria estimated by the theoretical model is examined under the experimental conditions of this study. In addition, we also discuss the influence of bubble initial size for predicting the inactivation effects.
从气泡与冲击波相互作用诱导的 OH 自由基的化学作用的角度出发，建立了一个用于估计海洋弧菌灭活效果的理论模型。它由细胞存活率的生物概率模型和由于冲击波压力导致的气泡坍塌运动的气泡动力学模型组成。生物概率模型是通过定义 OH 自由基的灭菌空间来构建的。为了确定灭菌空间的半径，在气泡动力学模型中求解了赫林方程，同时考虑了热导率和质量传输的影响。此外，使用模型中的压力测量获得了用于模型的入射冲击波的压力波形。另一方面，使用圆柱形水室中的高压电源对海洋弧菌进行生物实验。最后，根据本研究的实验条件，通过理论模型来检验海洋细菌的存活率。此外，我们还讨论了预测灭活效果时气泡初始尺寸的影响。
