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Topic: Yeast in Fermentation process  (Read 2689 times)

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Offline dazza95

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Yeast in Fermentation process
« on: March 20, 2012, 03:57:41 AM »
Yield of ethanol is mostly about survivability of the yeast.

We were wondering why Yeast can't survive too high concentrations of ethanol?
Something to do with the denaturation of proteins?
Not really sure on this, any help is appreciated
Thanks

Offline Babcock_Hall

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Re: Yeast in Fermentation process
« Reply #1 on: March 20, 2012, 09:18:49 AM »
I can offer a highly speculative answer.  Many water-soluble proteins have a hydrophobic core and a hydrophilic exterior.  They tend denature in organic solvents because the hydrophobic side-chains can now be exposed to solvent, and one can think of the protein as turning inside out.  Whether this is in fact what happens, I don't know.  Gary Pielak studies proteins in vivo by NMR, and possibly he would have some experimental data or better insight.

Offline discodermolide

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Re: Yeast in Fermentation process
« Reply #2 on: March 20, 2012, 10:06:35 AM »
Yield of ethanol is mostly about survivability of the yeast.

We were wondering why Yeast can't survive too high concentrations of ethanol?
Something to do with the denaturation of proteins?
Not really sure on this, any help is appreciated
Thanks


This may be due to osmosis where the ethanol permeates into the cell increasing or decreasing the internal pressure causing the cell membrane to rupture.
This is not my area but an (semi)-educated guess!
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Offline billnotgatez

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Re: Yeast in Fermentation process
« Reply #3 on: March 20, 2012, 10:41:21 AM »
This thread qualifies as cross posting between forums which does not follow the forum rules.

I am locking this thread
Should anyone want to continue discussing on this thread use the link below

http://www.chemicalforums.com/index.php?topic=56306.0


@dazza95
I see also you have posted on other peoples threads
That could give the appearance of hijacking threads

http://www.chemicalforums.com/index.php?topic=15879.0
http://www.chemicalforums.com/index.php?topic=23554.0

@everyone else

If you are a helper and have the time - going to the high school forum and undergraduate forum occasionally and providing your organic chemistry expertise would always be helpful






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