Microbial physiology and genetics; subsurface microbiology; microbiology of extreme and extraterrestrial environments; molecular characterization of microbial communities; biodegradation of hazardous waste and in situ biodegradation; lignocellulose biodegradation; restoration of chemically-contaminated soil and water.

    Microbial Ecology of the ISS              Clostridium:                  Pseudomonas stutzeri:                       Mars: Is life present?                 

                                                                                Degrades TNT.             Degrades carbon tetrachloride.        ( Movie: Rock Varnish Microbiology:

                                                                                                                                                                Requires QuickTime Player 7 or higher)   

Molecular Microbial Ecology of Idaho's Snake River Plain Aquifer.

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