Anaerobic oxidation of methane by thermophilic microorganisms
Cultivation and microbiology of novel anaerobic microorganisms
Imaging of microbial activity and carbon fixation using high-resolution secondary ion mass spectrometry
Multiple/ dual stable isotope probing approaches to explore microbial activities and carbon fixation in subsurface sediments
Organic, inorganic and isotope geochemistry of fluid-flow impacted geosystems
Marine Biogeochemistry including measurements microbially-mediated turnover in marine sediments (35S- and 14C-incubations and supervision of the radiotracer labs)