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cultures grew on ethyl alcohol…
https://phys.org/news/2018-06-team-microbes-survive-rooms-contaminate.html
…under very nutrient-restricted conditions, most of the tested strains grew on and biodegraded the cleaning agents used…. The work showed that cultures grew on ethyl alcohol as a sole carbon source.
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5 Replies
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Very interesting, thanks for the link!
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This study shows that just 0.1% ethyl alcohol can delay some bacteria from growing
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1449072/Alcohol doesn’t kill all bacteria by itself in liquid form
it’s the evaporation of alcohol that degrades bacteria.
http://www.scielo.br/pdf/rlae/v21n2/0104-1169-rlae-21-02-0618.pdfAnd even that doesn’t fully kill all bacteria
not for nothing they use steam autoclaves to sterilize pharma and surgical equipment, because alcohol evaporation ain’t clean enough. -
For people who use pure alcohol to sanitize (years ago I also used to think the higher the %, the better):
A diluted solution (e.g. 70% IPA) is more effective than pure alcohol, because the water will denature the proteins of the bacteria.
https://sciencing.com/alcohol-kill-bacteria-5462404.html
http://makingskincare.com/how-to-make-a-lotioncream-part-1-equipment-and-ingredients/ -
@Gunther @aperson
In the second study ^^ they name the use of friction during sanitizing.During my cleanroom courses I have learned (or learnt?) that friction (by wiping for example) is more effective than just spraying and letting evaporate. It has been a while and I can’t remember the reason/mechanism behind it.
What is your view on this?
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