Hans-Peter Koops

TL;DR: The presented 16S rRNA and amoA and AmoA sequence data from all recognized AOB species significantly extend the currently used molecular classification schemes for AOB and now provide a more robust phylogenetic framework for molecular diversity inventories of AOB.

TL;DR: The rRNA approach was used to investigate the abundance of other well-known nitrite-oxidizing bacterial genera and found that Nitrospira-like bacteria were present in significant numbers and frequently occurred in coaggregated microcolonies with N. mobilis.

TL;DR: A 16S rRNA-targeted oligonucleotide probe (NEU) specific for some representatives of the lithoautotrophic ammonia-oxidizing bacteria was developed based on comparative sequence analysis and showed promise in detecting dense cell clusters exclusively in those samples originating from sewage treatment plants with stable nitrification.

TL;DR: Polyphasic approaches, applying a combination of classical as well as molecular methods in parallel, could help to find the way for overcoming problems in the future of nitrifying bacterial communities in heterogeneous habitats.

TL;DR: A collection of 16S ribosomal RNA-targeted oligonucleotide probes for all validly described members of the genus Nitrobacter were designed for simultaneous identification of ammonia- and nitrite-oxidizing bacteria in natural and engineered systems.