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Old 04-18-2005, 05:34 PM   #11
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Warm might indeed be better, but I also think light is not good, if you are using clear soda bottles. Warm and dark is the ticket.

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Old 04-18-2005, 05:36 PM   #12
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so under the tank where its dark is good ... but if it were a little warmer it'd be better huh?

Well, I'll try to keep note of the temps in my house as it warms up here for spring and see if I notice any correlation to the CO2 output.

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Old 04-19-2005, 02:38 PM   #13
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Yeah, yeast is very responsive to higher temperatures. You can look up this paper:

Effects of fermentation temperature on the strain population of Saccharomyces cerevisiae. Torija MJ, Rozes N, Poblet M, Guillamon JM, Mas A.
Int J Food Microbiol. 2003 Jan 15;80(1):47-53.

I copied a link from one of their tables below:

[img] http://www.sciencedirect.com/cache/M...=dGLbVtz-zSkWW [/img]

This shows that with increasing temperature, you have a much shorter population density peak (2 days at 35 degrees C vs 6 days at 15C), and a correspondingly higher maximal fermentation rate (70g sugar per day at 35C vs 10g sugar per day at 15C.).

So yeah, temperature is highly correlated with CO2 evolution rates in yeast.


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co2, diy, diy co2

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