98021 Actinobacillus actinomycetemcomitans is a Gram-negative coccobacillus which can cause certain severe extra-oral infections as well as forms of human periodontal disease such as localized juvenile periodontitis. In contrast to many prokaryotic and eukary-otic species which exhibit an intact 23S ribosomal RNA (rRNA) molecule, examination of six A. actinomycetemcomitans strains-including thr...

Genomic information has already been applied to prokaryotic species definition and classification. However, the contribution of the genome sequence to prokaryotic genus delimitation has been less studied. To gain insights into genus definition for the prokaryotes, we attempted to reveal the genus-level genomic differences in the current prokaryotic classification system and to delineate the bou...

.............................................................................................................................................................................. 4 Introduction ......................................................................................................................................................................... 4 Material and methods .................

A new species of the genus Synersaga Gozmány, Synersaga mondulkiriensissp. n., is described from Cambodia. The genus is diagnosed, and a global catalogue for the genus is provided.

We discuss a family of multi-term addition formulae for Weierstrass functions on specialized curves of low genus with many automorphisms, concentrating mostly on the case of genus 1 and 2. In the genus 1 case, we give addition formulae for the equianharmonic and lemniscate cases, and in genus 2 we find some new addition formulae for a number of curves.

In this paper we highlight the benefits of using genus-2 curves in public-key cryptography. Compared to the standardized genus-1 curves, or elliptic curves, arithmetic on genus-2 curves is typically more involved but allows us to work with moduli of half the size. We give a taxonomy of the best known techniques to realize genus-2 based cryptography, which includes fast formulas on the Kummer su...

the genus calomyscus has long been considered monotypic and represented by the species c . bailwardi. finally in the most recent revision, eight geographic species were recognized: c . bailwardi, c. baluchi, c. elburzensis, c. grandis, c. hotsoni, c. mystax, c. tsolovi, and c . urartensis. since the taxonomic status of this genus remains somewhat controversial, karyological analysis may provide...

Previous morphological studies showed that the description of the Cyclotella genus was too general and according to new morphological criteria new genera were established based on both recent and fossil taxa ( e.g. Discostella, Handmannia, Puncticulata, Tertiarius). Furthermore, previous molecular biological investigations proved that the Cyclotella genus was not monophyletic. Integrating the a...