Aerobic ammonium oxidizing bacteria were first isolated more than 100 years ago and
hydroxylamine is known to be an intermediate. The enzymatic steps involving …

Background Allelopathy is an ecological phenomenon consisting of both positive and
negative effects between organisms determined by the release of secondary metabolites …

Nitrogen is essential for life on Earth. Soil biota are responsible for its accumulation,
persistence, and loss from ecosystems. Microbial nitrogen transformations include its …

Microbial processes have a central role in the global fluxes of the key biogenic greenhouse
gases (carbon dioxide, methane and nitrous oxide) and are likely to respond rapidly to …

" This thoroughly revised educational resource presents the biological principles that
underlie modern microbiological treatment technologies. Written by two of the field's …

The naturally occurring genetic heterogeneity of autotrophic ammonia-oxidizing populations
belonging to the beta subclass of the Proteobacteria was studied by using a newly …

Nitrospira are barely studied and mostly uncultured nitrite-oxidizing bacteria, which are,
according to molecular data, among the most diverse and widespread nitrifiers in natural …

Ammonia‐oxidizing archaea (AOA) play an important role in nitrification and many studies
exploit their amoA genes as marker for their diversity and abundance. We present an …

▪ Abstract The eutrophication of many ecosystems in recent decades has led to an increased
interest in the ecology of nitrogen transformation. Chemolitho-autotrophic ammonia …

The contamination of ground waters, abstracted for drinking and irrigation, by sediment-
derived arsenic threatens the health of tens of millions of people worldwide, most notably in …