2020年第47卷第12期目录
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封面故事:爆炸冲击波作用到人体时,会对人体头部、胸部、腹部及耳膜等部位产生创伤,如胸
部出现肺水肿和肺出血等症状. 近年来,由爆炸波引起的轻度创伤性脑损伤和脑震荡等大脑创伤问
题引起了大家越来越多的关注. 为了更好地理解爆炸创伤机理,应研究冲击波与微观组织作用的动
态力学过程. 本文运用分子动力学研究不同冲量的冲击波对DPPC膜造成的损伤,本研究首次探讨
了冲击过程中膜恢复的临界冲量值. 结果表明,当冲量大于153 mPa·s时,在冲击过程中没有观察到
膜的损伤恢复. 将膜冲击过程划为三个阶段,分别为冲击阶段、恢复阶段和后效阶段. 本课题可帮
助指导人员的爆炸创伤防护和简易爆炸装置设计. 此外,冲击波可应用于生物医学领域,如通过冲
击波输送药物和基因进入组织细胞、治疗结石等.
(王小峰,陶钢,徐宁,王鹏,李召,周杰. 爆炸波对生物膜微观创伤的分子动力学分
析,本期第1294~1302 页)
Cover Story:Blast wave can cause injury to human lungs, eardrums, gastrointestinal tract, brain and other organs.
The lungs, eardrums, and air-containing gastrointestinal tract are more likely to cause damage. The study of
explosive injury mechanism is of great significance to the treatment and protection of explosive injury and the
design of explosive devices. Pulmonary hemorrhage, pulmonary edema, and air embolism are the main causes of
explosive trauma death. Regarding the problem of explosive lung injury, the existing research in the macro aspect
mainly involves several aspects such as explosion wave and animal experiments, mechanical models and
numerical finite element simulation. In order to better understand the mechanism of blast injury, the mechanical
process of the impact of the shock wave and microstructure should be studied. In this paper, the damage of DPPC
(dipalmitoyl phosphatidyl choline) membrane caused by shock wave was studied by using all-atomic molecular
dynamics. The impulse of shock wave was controlled by stopping the piston, and the critical impulse of
membrane damage caused by shock wave was discussed. We observed the distribution of phospholipid molecules
and surrounding water molecules after the shock wave passed through the membrane under different impulses. It
was found that as the impulse increased, the membrane became more and more disordered, the folds were more
severe, and more and more water molecules in the hydrophobic area. The membrane impact process was divided
into three stages, namely the impact stage, recovery stage and after-effect stage. When the impulse is greater than
153 mPa·s, the damage of the membrane is not recovered during the impact.
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综述与专论
研究报告
技术与方法
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