The bactericidal effect of shock waves

18th APS-SCCM; 24th AIRAPT

Leighs, J.A.^1 ; Appleby-Thomas, G.J.^1 ; Wood, D.C.^1 ; Goff, M.J.^1 ; Hameed, A.^1 ; Hazell, P.J.^2

Cranfleld Defence and Security, Cranfleld University, Shrivenham

SN6 8LA, United Kingdom^1

School of Engineering and Information Technology, UNSW Canberra, University of New South Wales, Northcott Drive, Canberra

ACT

2600, Australia^2

关键词: Asteroid impact;    Bactericidal effects;    Control tests;    Peak pressure;    Phosphate buffered saline solutions;    Planet surface;    Planetary bodies;    SEM micrographs;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/18/182026/pdf
DOI  :  10.1088/1742-6596/500/18/182026

来源: IOP

【 摘 要 】

There are a variety of theories relating to the origins of life on our home planet, some of which discuss the possibility that life may have been spread via inter-planetary bodies. There have been a number of investigations into the ability of life to withstand the likely conditions generated by asteroid impact (both contained in the impactor and buried beneath the planet surface). Previously published data regarding the ability of bacteria to survive such applied shockwaves has produced conflicting conclusions. The work presented here used an established and published technique in combination with a single stage gas gun, to shock and subsequently recover Escherichia coli populations suspended in a phosphate buffered saline solution. Peak pressure across the sample region was calculated via numerical modelling. Survival data against peak sample pressure for recovered samples is presented alongside control tests. SEM micrographs of shocked samples are presented alongside control sets to highlight key differences between cells in each case.