Dear Helena,

If you want we could maybe send you a plate of Pseudomonas  
Aureofaciens. We use them for both O and N isotopes of nitrate (see  
Kaiser et al, 2007, or Casciotti et al., 2002). It's rather similar  
to Chlororaphis, and in addition you also get O isotopes right  
because of reduced O atom exchange with the surrounding medium during  
the incubation.

Please let me know if you want us to prepare a plate for you, and how  
would like to arrange for the shipping.

Best regards,

Samuel Morin
LGGE, Grenoble, France



On Apr 23, 2008, at 11:01 AM, Helena Jäntti wrote:

> Does anyone where I could get the bacterial strain of Pseudomonas  
> chlororaphis that lacks the N2O reductase capacity? The ATCC # is  
> 43928 but is not currently available from ATCC. Alternatively, does  
> anyone know are there any other strains that could be used in the  
> "denitrifier"-method that is used in 15NO3 analyzes?
>
> Best regards,
>
> Helena Jäntti
>
>
> Helena Jäntti (Msc)
> Researcher
> University of Helsinki/Division of Aquatic Sciences
>
>