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This work was partly funded by the ANR 'Jeunes Cherch-
eurs' grant NanoGeobio #06-JCJC-0158-02 (Anders
Meibom and Karim Benzerara). This work was also sup-
ported in part by NSF Grant CHE-0431425 (Stanford
Environmental Molecular Science Institute).The microbia-
lites were sampled during German-Indonesian Expedition
to Satonda Lake 1993 (led by Stephan Kempe, Darmstadt)
supported by the Deutsche Forschungsgemeinschaft. JS
was funded by the Polish Ministry of Science and Higher
Education, project N307-015733. The National Nano-
SIMS facility at the Mus ´ um National d'Histoire Naturelle
was established by funds from the CNRS, R ´ gion ˆ le de
France, Minist ` re d ´ l ´ gu ´ ` l'Enseignement sup ´ rieur et
` la Recherche, and the Mus ´ um itself. We thank Omar
Boudouma from the Laboratory Magie at University
Pierre et Marie Curie (Paris, France) who performed the
SEM analyses on the Zeiss Supra 55 SEM microscope.
Finally, we thank Emmanuelle Porcher (UMR 7254,
MNHN Paris, France) for programming the R routine
fitting the STXM polarization-dependent data.
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