Denitrification

Needed: Roommate for the EGU meeting in Vienna, Austria-April 19th-24

2009-01-07T13:00:00.004-05:00

I am looking to find a roommate for the EGU meeting in Vienna, Austria April 19th-24th. If you are interested please let me know.

Happy New Year!

Rebecca

Short-term job opportunity in denitrification research

2008-06-16T17:07:00.004-04:00

I just posted a job ad on Ecolog and on the ESA Biogeosciences listservs for a short-term full-time research technician position in the Bernhardt Lab at Duke University (Aug-Nov 2008).

If you know of a recent grad or technician who would be interested in a 4-month position working with 15N tracers to investigate N-cycling and denitrification in a coastal wetland, please encourage them to apply.

I have posted the text of the ad at http://www.duke.edu/~jlm40/technician.htm

Thanks,
Jen

To cook or not to cook

2008-06-09T11:54:00.002-04:00

The question came up in the initial post comments as to whether the furnace was required for these measurements. I'll start the ball rolling on this to stimulate others to describe their experiences. First, a disclaimer. I have some, but very limited experience working with a furnace online for N2 analyses. My evaluation of the 'oxygen effect' is reported in Kana and Weiss 2004 Estuaries 27: 157-160 where we showed that there is a small measurable influence of [O2] on the N2/Ar ratio. My conclusion from this is that for very high precision ratios of N2/Ar in situations where [O2] varies substantially, then a furnace is desirable. Also, from my experience and that of others, the N2/Ar signal stability and reproducibility is improved (perhaps 3-fold) by running a furnace. A downside of the furnace is obviously the lack of oxygen concentration measurements. Also, in my experience, I find that signal instabilities happen sometimes and they can be very hard to debug.

The answer to the question of whether to use a furnace is, in my opinion, dependent on the level of precision one needs for the work at hand.

Welcome to our blog!

2008-05-30T22:16:00.002-04:00

Welcome to the official denitrification blog! All of the participants at the RCN measurements workshop have been invited to be authors on this blog. However, anyone is able to access the blog and make comments. I hope we'll all take advantage of this forum for us to continue the great conversations we had this past week. Thanks again to the RCN steering committee and all of those at HPL for putting on an amazingly productive and enjoyable workshop!