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Bicarbonate

Bicarbonate

(Science: chemistry) a carbonate in which but half the hydrogen of the acid is replaced by a positive element or radical, thus making the proportion of the acid to the positive or basic portion twice what it is in the normal carbonates; an acid carbonate; sometimes called supercarbonate.

They are an important factor in determining the ph of the blood and the concentration of bicarbonate ions is regulated by the kidney. Levels in the blood are an index of the alkali reserve or buffering capacity.

Pharmacological action: buffers.


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Gas exchange

The affinity (binding strength) changes according to pH, and excess carbon dioxide (bicarbonate in blood) changes the local pH, loosening the hold on oxygen.

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by Darby
Thu Oct 29, 2009 7:32 pm
 
Forum: Human Biology
Topic: Gas exchange
Replies: 6
Views: 120

Does all photosynthesis use CO2?

I can't find an easy answer to this online, so does all photosynthesizing life use carbon dioxide (or carbonic acid/bicarbonate/carbonate) as the source of carbon? Thanks!

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by dae
Thu Oct 15, 2009 4:05 pm
 
Forum: Botany Discussion
Topic: Does all photosynthesis use CO2?
Replies: 3
Views: 140

Organic compounds

... differently in bio than it is in chem? Because I thought it referred to any carbon-based compound, but I just got some notes from my prof that say bicarbonate (HCO3-) is inorganic. ~Jules~

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by Jules19
Thu Oct 08, 2009 8:50 pm
 
Forum: General Discussion
Topic: Organic compounds
Replies: 2
Views: 83

Re:

Are you adding the buffer to solution or solution to the buffer? I'm adding sodium bicarbonate as a solid to diH20. Thanks, I should have specified that.

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by dae
Sat Oct 03, 2009 2:26 pm
 
Forum: Molecular Biology
Topic: Biochemical Buffers Confusion
Replies: 3
Views: 120

Biochemical Buffers Confusion

... weak acid, so you should always get solution of pH in between of pKa1 and pKa2, unless you won't add some alkaline (in this case add NaOH to make bicarbonate buffer)

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by JackBean
Sat Oct 03, 2009 12:23 pm
 
Forum: Molecular Biology
Topic: Biochemical Buffers Confusion
Replies: 3
Views: 120
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