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Re: Fungal strains in space spark worry - we might have already contaminated --

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Le 2026-05-07 à 13:47, Jim Wilkins a écrit :
> "a425couple"  wrote in message news:Yz2LR.867599$DN1.339445@fx48.iad...
> 
> NASA found fungal strains that survive even its most stringent
> sterilization efforts, suggesting Earth microbes may already be living
> on Mars.
> 
> ---------------------------------
> NASA has to balance sterilization conditions with survival of the 
> delicate instruments. The more effective chemicals like ozone and 
> chlorine dioxide are corrosive. They sterilize at 125C, the top of the 
> military range, which is above boiling and at or slightly above pressure 
> cooking temperature. 80C is usually assumed to sterilize food, usually 
> 65C is considered adequate.
> 
> 125C is the high end of the heat tolerance for electronics. Some simpler 
> parts can handle 150C. I've worked in the testing field and have made a 
> transistor fail in a few minutes by operating it at 180C. High 
> temperature shortens component life and is used to estimate and test 
> long predicted lifetimes, but heat stressing the parts you intend to use 
> can degrade them, so it's done on small representative batches of a 
> production run.
> https://en.wikipedia.org/wiki/Accelerated_life_testing
> 
> Autoclaves that sterilize medical instruments operate between 121C and 
> 135C.
> https://tuttnauer.com/knowledge-center/sterile-processing/autoclave/ 
> autoclave-temperature-range-for-effective-sterilization
> 
> https://en.wikipedia.org/wiki/Operating_temperature
> 

A fine balance must be made between total sterilization and survival of 
the instrument.
No point sterilizing the probe when doing so also destroys it.

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Fungal strains in space spark worry - we might have already contaminated -- a425couple <a425couple@hotmail.com> - 2026-05-07 08:53 -0700
  Re: Fungal strains in space spark worry - we might have already contaminated -- "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-07 13:47 -0400
    Re: Fungal strains in space spark worry - we might have already contaminated -- Kualinar <kuakinar@videotron.ca> - 2026-05-07 18:11 -0400
  Re: Fungal strains in space spark worry - we might have already contaminated -- Daniel <me@sc1f1dan.com> - 2026-05-08 03:04 -0700
    Re: Fungal strains in space spark worry - we might have already contaminated -- "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-08 08:53 -0400
      Re: Fungal strains in space spark worry - we might have already contaminated -- "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-08 10:58 -0400
        Re: Fungal strains in space spark worry - we might have already contaminated -- Kualinar <kuakinar@videotron.ca> - 2026-05-08 12:31 -0400
          Re: Fungal strains in space spark worry - we might have already contaminated -- "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-08 13:17 -0400
            Re: Fungal strains in space spark worry - we might have already contaminated -- "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-09 12:42 -0400
          Re: Fungal strains in space spark worry - we might have already contaminated -- a425couple <a425couple@hotmail.com> - 2026-05-09 13:53 -0700
            Re: Fungal strains in space spark worry - we might have already contaminated -- "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-09 19:07 -0400
            Re: Fungal strains in space spark worry - we might have already contaminated -- "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-09 20:32 -0400
              Re: Fungal strains in space spark worry - we might have already contaminated -- "Jim Wilkins" <muratlanne@gmail.com> - 2026-05-10 08:11 -0400

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