Re: Carbon uptake

[Paul Sears <psears at nrn1_NRCan.gc.ca>]

> From: Dave Gomberg <gomberg at wcf_com>
> Subject: Carbon uptake
> 
> 
> The bottom line appears to be this:   Since at the leaf surface carbonic
> anyhdrase greatly facilitates the reaction:   CO2 + H20 <-> H2CO3 which is
> otherwise a pretty slow reaction 

	Slow by chemists' standards - we are talking about a few seconds
here.  Fast reactions take microseconds or less.

> and since the bicarbonate ion is dominant
> at most aquarium pHs (6.5-9) (with increasing importance of the carbonate
> at lower pHs) 

	Higher pH.  You can pretty well forget about it below 9 or so.


-- 
Paul Sears        Ottawa, Canada

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