Polag, D., H. Heuwinkel, S. Laukenmann, M. Greule and F. Keppler: Evidence of anaerobic syntrophic acetate oxidation in biogas batch reactors by analysis of 13C carbon isotopes. In: Isotopes in Environmental and Health Studies 49, 3, 365-377 (2013).
Wuerfel, O., M. Greule, F. Keppler, M. A. Jochmann and T. C. Schmidt: Position-specific isotope analysis of the methyl group carbon in methylcobalamin for the investigation of biomethylation processes. In: Analytical and Bioanalytical Chemistry 405, 9, 2833-2841 (2013).
Gori, Y., R. Wehrens, M. Greule, F. Keppler, L. Ziller, N. La Porta and F. Camin: Carbon, hydrogen and oxygen stable isotope ratios of whole wood, cellulose and lignin methoxyl groups of Picea abies as climate proxies. In: Rapid Communications in Mass Spectrometry 27, 1, 265-275 (2013).
Nadalig, T., M. Greule, F. Bringel, S. Vuilleumier and F. Keppler: Hydrogen and carbon isotope fractionation during degradation of chloromethane by methylotrophic bacteria. In: Microbiologyopen 2, 6, 893-900 (2013).
Greule, M., S. G. Huber and F. Keppler: Stable hydrogen-isotope analysis of methyl chloride emitted from heated halophytic plants. In: Atmospheric Environment 62, 584-592 (2012).
Lenhart, K., M. Bunge, S. Ratering, T. R. Neu, I. Schuttmann, M. Greule, C. Kammann, S. Schnell, C. Müller, H. Zorn and F. Keppler: Evidence for methane production by saprotrophic fungi. In: Nature Communications 3, Seq. No.: 1046 (2012).
Jugold, A., F. Althoff, M. Hurkuck, M. Greule, K. Lenhart, J. Lelieveld and F. Keppler: Non-microbial methane formation in oxic soils. In: Biogeosciences 9, 12, 5291-5301 (2012).
Wang, Z. P., F. Keppler, M. Greule and J. T. G. Hamilton: Non-microbial methane emissions from fresh leaves: Effects of physical wounding and anoxia. In: Atmospheric Environment 45, 28, 4915-4921 (2011).
Greule, M. and F. Keppler: Stable isotope determination of ester and ether methyl moieties in plant methoxyl groups. In: Isotopes in Environmental and Health Studies 47, 4, 470-482 (2011).
Laukenmann, S., D. Polag, H. Heuwinkel, M. Greule, A. Gronauer, J. Lelieveld and F. Keppler: Identification of methanogenic pathways in anaerobic digesters using stable carbon isotopes. In: Engineering in Life Sciences 10, 6, 509-514 (2010).
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