Ulrike,
This sounds great, its the same type of thing I 
do in my lab class, which is why I would like to 
do the JGE approach..I will add you to my list of people interested!
Cheers
Greg

At 07:20 AM 2/25/2009, you wrote:
>Dear Greg,
>
>I would be interested in participating but I´m 
>not sure if the lab-experiments we designed some 
>years ago are serieous / scientific enough to be 
>published. To introduce students to isotope 
>fractionation, mass-spectrometry and 
>gas-chromatography we do the following experiments:
>
>1) Measurement of the isotopic composition of 
>atmospheric oxygen and nitrogen and comparison 
>with the isotopic composition of the same gases ( and CO2) in expired air
>2) Measurement of the C- isotopic composition of 
>different sugars / honey and comparison with the 
>C-isotopic composition of CO2 released during 
>respiration of yeast feeded with the sugars / honey.
>3) Measurement and comparison of the isotopic composition of CO2 of
>expired air and exhaust gas of cars.
>
>Please let me know, if these topics may be of 
>interest for the issue mentioned below.
>
>Have a nice day
>
>Ulrike Schulte
>
>>>Second call for anyone interested in putting 
>>>together some isotope related education articles for J. of Geoscience education
>>
>>
>>
>>
>>Greg Michalski, Assistant Professor
>>http://www.purdue.edu/eas/michalski/
>>Department of Earth and Atmospheric Sciences
>>Purdue University
>>550 Stadium Mall Dr.
>>Lafayette IN.47907
>
>
>--
>------------------------------------------------
>Dr. Ulrike Schulte
>Institut für Geologie, Mineralogie und Geophysik
>Lehrstuhl für Sediment- und Isotopengeologie
>Ruhr-Universität Bochum
>Universitätsstr. 150
>
>D-44801 Bochum
>
>Tel.: 0234/32-25454
>Fax.: 0234/32-14571
>------------------------------------------------

Greg Michalski, Assistant Professor
http://www.purdue.edu/eas/michalski/
Department of Earth and Atmospheric Sciences
Purdue University
550 Stadium Mall Dr.
Lafayette IN.47907