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The main reason why alcohols (isopropanol and ethanol mostly) can be used as disinfectants is that they denature (bacterial) proteins. This is also the reason why they work on such a broad spectrum of microorganisms (bacteria, fungi, viruses), but not on spores, as these are better protected. The higher the concentration of the alcohol is, the faster this ...


4

So this is a good question. 70% is optimal for most cell types, especially those with a cell wall like prokaryotes. Wikipedia is a little off here. The reason you add water is to make the solution hypotonic. The alcohol disrupts the hydrophobic forces holding the phospholipids of the membrane while dehydrating any peptidogylcan of the wall enough to ...


3

Drosophila is seen as a highly alcohol tolerant species which is mainly dependent on the environment it lives in. So are flies, which are captured in the cellar of a wine yard more tolerant to alcohol than flies which are captured outside (see first reference). The environment in which the flies grow up and live does not influence the activity of the ...



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