Murray, R. G. E. (University of Western Ontario, London, Ont., Canada), and S. W. Watson. Structure of Nitrosocystis oceanus and comparison with Nitrosomonas and Nitrobacter. J. Bacteriol. 89:1594-1609. 1965.-Nitrosocystis oceanus has distinctive features: the cell wall (overall thickness, 250 A) has an inner triplet structure and a dense enveloping layer; between these lie the "cell-wall organ...

The phylogeny of bacteria belonging to the genus Nitrobacter was investigated by sequencing the whole 16S rRNA gene. The average level of similarity for the three Nitrobacter strains examined was high (99.2%), and the similarity level between Nitrobacter winogradskyi and Nitrobacter sp. strain LL, which represent two different genomic species, was even higher (99.6%). When all of the Nitrobacte...

In this work the question was addressed if in nitrite-oxidizing activated sludge systems the environmental competition between Nitrobacter spp. and Nitrospira spp., which only recently has been discovered to play a role in these systems, is affected by the nitrite concentrations. Two parallel chemostats were inoculated with nitrifying-activated sludge containing Nitrospira and operated under id...

The alphaproteobacterium Nitrobacter hamburgensis X14 is a gram-negative facultative chemolithoautotroph that conserves energy from the oxidation of nitrite to nitrate. Sequencing and analysis of the Nitrobacter hamburgensis X14 genome revealed four replicons comprised of one chromosome (4.4 Mbp) and three plasmids (294, 188, and 121 kbp). Over 20% of the genome is composed of pseudogenes and p...

As cyber attacks become increasingly distributed and sophisticated, so must our defenses. Collaborative processing of data produced by independent sources is advantageous for early and accurate detection of Internet-based threats, and instrumental for identifying complex attack patterns that target multiple administratively and geographically disjoint entities. In this paper, we introduce Agili...

Many animals avoid attack from predators through toxicity or the emission of repellent chemicals. Defensive mimicry has evolved in many species to deceive shared predators, for instance through colouration and other morphological adaptations, but mimicry hardly ever seems to involve multi-trait similarities. Here we report on a wingless parasitoid wasp that exhibits a full spectrum of traits mi...

Oxidation of nitrite to nitrate in aquaria is typically attributed to bacteria belonging to the genus Nitrobacter which are members of the alpha subdivision of the class Proteobacteria. In order to identify bacteria responsible for nitrite oxidation in aquaria, clone libraries of rRNA genes were developed from biofilms of several freshwater aquaria. Analysis of the rDNA libraries, along with re...

Population dynamic of nitrifying bacteria was investigated for nitrogen removal from municipal wastewater. Nitritation was established with nitrite accumulation ratios above 85%. Quantitative PCR indicated that Nitrospira was dominant nitrite oxidizing bacteria (NOB) and Nitrobacter was few. During nitritation achieving, Nitrobacter was firstly eliminated, along with inhibition of Nitrospira bi...

Three heterotrophic stramenopiles--Apoikia lindahlii comb. nov. (Chrysophyceae), Filos agilis gen. et sp. nov. (Bicosoecida), and Nanos amicus gen. et sp. nov. (Bicosoecida)--were isolated from acidic peat bogs. The biflagellate A. lindahlii forms loose irregular colonies from which swimming cells may detach, and produces extensive mucilaginous material containing bacterial cells. Phylogenetic ...

We redescribe the winged imagos and soldiers of two equatorial African species, Neotermes aburiensis Sjöstedt and N. agilis (Sjöstedt) and describe their unique character attributes. The imago of N. aburiensis is adorned with unique spatulate-pointed setae. The soldier of N. aburiensis is unique among Neotermes in possessing a phragmotic forehead. The imago of N. agilis is small and unique amon...