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Natural Science Forum / Biology / Microbiology / March 2007microorganisms survive rate in a vacuum
This is just a small bet that developed over a few drinks last night: Does anyone know the reaction of microorganisms (specifically bacteria, viruses and parasitic protozoa often found in drinking water) to lowered pressure. Specifically, whether or not it will kill them. Thanks! Stephano > This is just a small bet that developed over a few drinks last night: > [quoted text clipped - 5 lines] > Thanks! > Stephano STephano hi Thinking about something other than a very specialised contained system : You would have to pull a pretty significant vacuum for extended periods, above a body of static water or turbulent water to produce any significant effects on the organisms there in, in my opinion. Perhapes if you defined the conditons a better answer could be given. N10 :) > This is just a small bet that developed over a few drinks last night: > [quoted text clipped - 5 lines] > Thanks! > Stephano A common method of preserving bacteria and fungi is to freeze dry them. With this method the bacteria, fungi or fungal spores are placed in a medium such as sterle skim milk, sterile serum or on to blotting paper strips in long slim tubes (usually glass). The tubes are then subjected to a vacuum, this causes the water to sublime (ie the water goes from a liquid state to a gaseos state without the creation of ice crystals. The tubes are then heat sealed whilst still under vacuum. Thes freeze dried stocks last for decades. >This is just a small bet that developed over a few drinks last night: I suspect that you all lost the bet. >Does anyone know the reaction of microorganisms (specifically >bacteria, viruses and parasitic protozoa often found in drinking >water) to lowered pressure. Specifically, whether or not it will kill >them. It will depend on the precise conditions, and on the bug. There is no general answer. bob >>This is just a small bet that developed over a few drinks last night: > [quoted text clipped - 9 lines] > > bob Obviously still hung over ! :) N10:) |
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