the nitrogen cycle

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chen.lie
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the nitrogen cycle

Post by chen.lie » Wed Nov 09, 2005 11:30 am

hello,
i am studying the nitrogen cycle and I have a few quesitons for you all.

Does anyone know the equation of denitrification?
Are symbiotic relationships aquivalent to mutualistic relationships?

thank you in advance
regards

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MrMistery
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Post by MrMistery » Wed Nov 09, 2005 7:10 pm

Does anyone know the equation of denitrification?

It means turning NO3 and NO2 into NO, N2O and N2. The actual equation depends on the bacteria you are using. For example, for Thiobacillus denitrificans it is:
6KNO3 + 5S +CaCO3 --> 3N2 + 3K2SO4 + 2CaSO4 + 2CO2 + ENERGY

Are symbiotic relationships aquivalent to mutualistic relationships?

NO, the relanshionship between a parazite and it's host is also symbiosis and it is by no means mutualistic. HOWEVER, for some reason unknown to me, some authors use the term "symbiosis" as you definet it, the equivalent of "mutualistic symbiosis"
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

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