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70% ethanol

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70%

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Q: What concentration of Ethyl alcohol is effective bactericide?
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What fermentation includes ethyl alcohol?

Alcoholic fermentation


Yeast cells under anaerobic conditions?

Yeast cells are facultatively anaerobic. This means that they perform fermentation under anaerobic conditions. When the oxygen concentration is low, pyruvate is turned into ethanol and carbon dioxide.


How many calories of heat does it take to raise the temperature of one gram or ethyl alcohol by 1 degree centigrade?

It takes 2.46 calories of heat to raise the temperature of one gram of ethyl alcohol. Calories are the energy available from the metabolism of a food.


When making Ethyl Alcohol by fermentation when does Methyl Alcohol become a possibility and how do you avoid it?

Methyl Alcohol is not a product of fermentation so no steps are required to avoid it. You are morelikey to get annoying levels of Ethyl Acetate which is solvent smelling and tasting. Methyl Alcohol can be found in trace amounts in wine and fruit brandies but this is due to the breakdown of pectin the the cell walls of the fruit and not fermentation. Its worth noting that the treatment for Methyl Alcohol poisoning is ingestion of Ethyl Alcohol. Both are prcessed by the same enzyme which much prefers to breakdown Ethyl Alcohol. Basically they keep you drunk until all the Methyl Alcohol has been sweated/breathed/urinated out of your system. Methyl Alcohol isn't actually poisonous, BUT its metbolised by your body into chemicals that are. Any product of fermentation containing Methyl Alcohol will contain more than enough Ethyl Alcohol to protect you from it. Anyone concerned about Methyl Alcohol ingestion should read up on Aspartame. The Diet Coke you drink may exposure you to more methanol than you realise.


What is phenyl ethyl alcohol agar?

Phenylethyl alcohol agar (PEA) is a selective media used to cultivate Gram (+)microorganisms. The active ingredient, phenylethyl alcohol, inhibits or reduces growth of Gram (-) microorganisms by interfering with DNA synthesis.