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Nitrification is included in the Wikipedia CD Selection, see Nitrification at Schools Wikipedia. Please maintain high quality standards; if you are an established editor your last version in the article history may be used so please don't leave the article with unresolved issues, and make an extra effort to include free images, because non-free images cannot be used on the DVDs.
I believe the image is from the site of the book; Campbell and Reece: Biology. You'll need a accescode for the site; www.campbellbiology.com
Is this statement meant to dispute the basis for the USEPA employee authorship and public domain status of the graphic in the article? So far, I'm not buying it: image looks to be PD. -- Paleorthid 20:36, 18 June 2006 (UTC)
I don't really understand what you're trying to say. I've checked my book, and the image is indeed in it. Don't believe me? Check it out for yourselve: Campbell & Reece, Biology. I have the seventh edition, and there the image appears on page 1197. And hey, I'm only trying to help.
The image appears on the EPA's website . I don't see anything that suggests they lifted it anywhere else (or, if they did, they're doing so illicitly), so it seems PD to me. Could it be that Campbell and Reece have "borrowed" it? Cheers, --Plumbago 11:17, 20 June 2006 (UTC)
Does the picture of the nitrogen cycle really belong here? I think an example of denitrification mechanism would be more acceptable. —Preceding unsigned comment added by 126.96.36.199 (talk) 23:04, 5 May 2008 (UTC)
An example of denitrification certainly doesn't belong here either. I will try make a more update picture of the N-cycle, because this one doesn't include the aquatic ecosystem where most of the N-cycling occurs. uuuǝıɹ 14:49, 13 February 2013 (UTC)
Are we sure that the oxygen atom in the NO2 -> NO3 step comes from water? The Nitrifying_bacteria pages lists otherwise. 188.8.131.52 16:41, 10 November 2006 (UTC)
it does indeed come from water, the page you are citing says the same (Ward, Arp& Klotz, Nitrification, 2010 pp 279, ASM Press) uuuǝıɹ 14:38, 13 February 2013 (UTC) — Preceding unsigned comment added by Riennn (talk • contribs)
a lot of stuff has to be updated on these pages. Both Nitrification and Nitrifying bacteria articles need a complete overhaul. I'll see what I can do. uuuǝıɹ 14:42, 13 February 2013 (UTC) — Preceding unsigned comment added by Riennn (talk • contribs)
I removed the CO2 from the left-hand side of the top two chemical equations: As it stood, these equations seemed to imply that the nitrification process involved carbon vanishing into nothingness, since there was carbon on the left side and not the right (and the number of oxygen atoms didn't match, either). If the intent was to represent that carbon dioxide is involved as a catalyst (is that the case?), there are better ways to state that. (I'm also not sure it makes sense to list the bacteria genera as if they were reactants in the equation, but I'll leave that alone unless someone else has a better idea as to how to include them.) If there's something I'm misinterpreting here and the CO2 did belong there, please explain, but it really didn't make sense to me. --Smeazel (talk) 00:50, 19 November 2011 (UTC)
my best guess is that somebody was trying to imply that nitrifiers are autrotrophs (fix carbon)... so good you removed this. It has nothing to do with the actual reaction. uuuǝıɹ 14:43, 13 February 2013 (UTC) — Preceding unsigned comment added by Riennn (talk • contribs)
also, although this reaction # 2 NH3 + 3 O2 → 2 NO2- + 2 H2O + 2 H+ (Nitrosomonas) is stoichiometrically correct, it does not happen IRL. it's a two step process. NH3+O2-->NH2OH+H2O-->NO2-+5H+ uuuǝıɹ 14:47, 13 February 2013 (UTC)