Department of Mechanical Engineering, National University of Singapore, Singapore, 117576.
Biofouling. 2012;28(2):131-41. doi: 10.1080/08927014.2012.658511.
Low frequency, low intensity ultrasound was demonstrated as an effective inhibitor of barnacle cyprid settlement. When the same substratum vibration amplitude (10.05 nm) and acoustic pressure (5 kPa) were applied, ultrasound at a frequency of 23 kHz significantly reduced cyprid settlement. The mechanism appeared to differ from the ultrasonic cavitation induced inhibition previously reported as no increased mortality was observed, and no change in the exploratory behaviour of cyprids was observed when they were exposed to this continuous ultrasonic irradiation regime. The application of ultrasound treatment in an intermittent mode of '5 min on and 20 min off' at 20-25 kHz and at the low intensity of 5 kPa produced the same effect as the continuous application of 23 kHz. This energy efficient approach to the use of low frequency, low intensity ultrasound may present a promising and efficient strategy regarding irradiation treatment for antifouling applications.
低频、低强度超声被证明是一种有效的藤壶幼体附着抑制剂。当应用相同的基底振动幅度（10.05nm）和声压（5kPa）时，频率为 23kHz 的超声显著降低了藤壶幼体的附着。其机制似乎与以前报道的超声空化诱导抑制不同，因为在连续超声辐射下没有观察到死亡率的增加，也没有观察到藤壶幼体探索行为的变化。在 20-25kHz 的 20-25kHz 和 5kPa 的低强度下以“5min 开和 20min 关”的间歇模式应用超声处理产生了与连续应用 23kHz 相同的效果。这种使用低频、低强度超声的节能方法可能为防污应用的辐照处理提供了一种有前途和有效的策略。
