Dear Brian, dear All,

maybe our paper :
*Influence of chemical agents commonly used for soil fauna 
investigations on the stable C-isotopic signature of soil animals* • ARTICLE
*/In Press, Corrected Proof/*, /Available online 28 July 2006/
C. Sticht, S. Schrader and A. Giesemann
in European Journal of Soil Biology
might help.

Regards
Anette Giesemann

Andrea Lini schrieb:
> Hello All,
> if anyone can help Brian, please contact him directly as he is not a 
> member of the list.
> Thx!
> Andrea
>
> Begin forwarded message:
>
>> *From: *"Brian James. Darby" <[log in to unmask] 
>> <mailto:[log in to unmask]>>
>> *Date: *October 5, 2006 2:29:14 PM EDT (CA)
>> *To: *Andrea Lini <[log in to unmask] <mailto:[log in to unmask]>>
>> *Subject: **Re: *
>>
>> Could you please post this message on the list serve, thanks,
>> ----
>> I am a graduate student looking to conduct stable isotope analysis on 
>> very small biomass of soil nematodes. Our main problem is that all 
>> the organisms are very small (e.g. 100 ng fresh weight per nematode) 
>> and we can probably only isolate by hand less than 100 or so 
>> individuals (limited by time and number of available individuals). We 
>> are considering two approaches: 1) natural abundance of both C and N 
>> isotopes that would allow us to distinguish feeding on 
>> photosynthesizers vs. diazotrophs, or 2) enriched biomass of just 15N 
>> on nematodes collected from cosms fumigated with labeled atmospheric 
>> nitrogen. We'd like to find someone who is willing to run a few 
>> samples for us and help us estimate the very minimum sample size. 
>> This will help us to determine the finest level of nematode taxonomic 
>> resolution possible (i.e., how many nematodes have to be hand picked 
>> out of a sample and combined).
>>
>> Contact me by email if you think you can help me troubleshoot this 
>> and I can describe our system more.
>>
>> Brian Darby
>> [log in to unmask] <mailto:[log in to unmask]>
>>
>> Brian J. Darby
>> University of Vermont
>> Department of Plant and Soil Sciences
>> Hills Room 123
>> 105 Carrigan Drive
>> Burlington, VT 05405
>>
>> (802)656-9482
>>
>
>
>
> ====================================
> Dr. Andrea Lini
> Department of Geology
> University of Vermont
> Burlington, VT 05405 U.S.A.
> Office: (802) 656 0245, Lab: (802) 656 9079
> Fax: (802) 656 0045
> http://www.isogeochem.com
> ====================================
>
>
>
>


-- 
Dr. Anette Giesemann
Institute of Agroecology
Federal Agricultural Research Centre (FAL)
Bundesallee 50
D- 38116 Braunschweig
Germany