David L. Balkwill

TL;DR: Assays of microbial cell components are validated by comparison with the classical direct count in at least one soil/sediment by using conversion factors determined on subsurface microorganism monocultures.

TL;DR: A novel solvent-producing, anaerobic clostridium, strain P7(T), was isolated from sediment from an agricultural settling lagoon after enrichment with CO as the substrate and analysis of the 16S rRNA gene sequence showed that it was closely related to Clostridial scatologenes ATCC 25775(T) (99.7% sequence similarity).

TL;DR: Comparisons of 16S rDNA genes indicated that Smithella propionica is most closely related to syntrophus, and is more distantly related to Syntrophobacter, but they differed significantly in substrate ranges and catabolic products.

TL;DR: The results of this study suggest that the microbial population of these two shallow aquifers is dominated by aerobic, nutritionally versatile bacteria that can subsist on low concentrations of organic compounds without forming specialized resting cells.

TL;DR: Evidence from the quantitative PCR analysis corroborated information obtained from 16S rRNA gene clone libraries, indicating that members of the δ-Proteobacteria subdivision, including Anaeromyxobacter dehalogenans-related and Geobacter-related sequences, are important metal-reducing organisms in acidic subsurface sediments.