脉冲超声对果蝇存活的影响。

The effect of pulsed ultrasound on the survival of Drosophila.

作者信息

Pay T L, Barrick M K

出版信息

Ultrasound Med Biol. 1987 Feb;13(2):93-5. doi: 10.1016/0301-5629(87)90079-2.

Abstract

There are reports in the literature that the temporal peak intensity of pulsed ultrasound may be a better predictor of biological damage than is average intensity. The effects of temporal peak intensity on the survival of Drosophila melanogaster pupae exposed to pulsed ultrasound were investigated. Pulse average intensity and pulse repetition frequency were varied, while temporal average intensity and exposure duration were held constant. Thus, the total energy delivered was held constant. Survival was found to be directly dependent on pulse average intensity. We observed decreased survival at spatial average pulse average intensities as low as 0.5 W/cm2.

摘要

文献中有报道称，脉冲超声的时间峰值强度可能比平均强度更能预测生物损伤。研究了时间峰值强度对暴露于脉冲超声下的黑腹果蝇蛹存活率的影响。改变脉冲平均强度和脉冲重复频率，同时保持时间平均强度和暴露持续时间不变。因此，传递的总能量保持不变。发现存活率直接取决于脉冲平均强度。我们观察到，在空间平均脉冲平均强度低至0.5W/cm²时，存活率会降低。