Imagin that you want to make sure a part of a wall has no alive bacteria and its clean. I believe there would be a kind of simple liquid which gets discoloration againt alive bacteria in some minutes. If anybody knows how can I get it please let me know.
Thanks,
Ben.
2007-03-09 08:40:35 · 3 answers · asked by Ben D 2 in Science & Mathematics ➔ Biology
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2007-03-09 08:43:52 · answer #1 · answered by DanE 7 · 0⤊ 0⤋
Actually, I'm not aware of anything that'd do that. Telling the difference between living and dead bacteria is non-trivial, even in a lab situation. What most biologists do is culture the specimen, and if it doesn't grow, you can assume it's dead. But the problem with that technique is that the bacteria might have been alive, but if you chose an incorrect culture medium, you might have killed them or prevented them from reproducing.
You can buy kits which you can apply to a sample and then shine UV light on... the live bacteria will fluoresce a different color than the dead ones. But the last time I bought one of those it was *not* cheap.
2007-03-09 08:52:04 · answer #2 · answered by MissA 7 · 0⤊ 0⤋
Take a sample of the wall and place in agar. Place in warm place for 24 hours. If there are colonies, then bacteria is present.
2007-03-09 09:26:27 · answer #3 · answered by opium_4_life 2 · 0⤊ 0⤋