(Eristalis spp.) has been fooling humans for thousands of years (Atkins, 1948). The important question in considering whether it is a true case of Batesian mimicry, however, is whether it fools their predators, which are thought to be birds. Eristalis spp. are not considered to be the best visual mimics of honeybees; other British hoverflies such as Mallota cimbiciformis (Fallén), Criorhina asi...

Biota-sediment accumulation factors (BSAF) were calculated for Diporeia spp. and oligochaete worms exposed to polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) from field-collected sediment. These data were compared to the contaminant fraction extracted from sediment with Tenax resin using a 24 h extraction. A previous laboratory study suggested a linear relationship ...

BACKGROUND AND AIMS Plant species composition in wetlands and on lakeshores often shows dramatic zonation, which is frequently ascribed to differences in flooding tolerance. This study compared the growth responses to water depth of three species (Phormium tenax, Carex secta and Typha orientalis) differing in depth preferences in wetlands, using non-linear and quantile regression analyses to es...

Grassland prairies of western Oregon and Washington are among the most endangered ecosystems in the United States. Active management and restoration are needed to promote biodiversity in the region. To support plant production for use in habitat restoration, we developed germination protocols for greenhouse propagation of Iris tenax (Oregon iris). Dormancy was most effectively overcome (63% ger...

Trichomonas tenax is a flagellated protozoan commonly found in the human oral cavity but of unusual occurrence in pulmonary infections. We describe a case of a 67-year-old patient with glioblastoma who presented with severe pleurisy in the post-operative period while she was receiving high-dose corticotherapy. Several motile flagellated protozoa were identified in the pleural fluid. Trichomonas...

BACKGROUND Several species of trichomonads are intestinal or urogenital parasites of humans and animals, with only a few species typically being located in the oral cavity. The prevalence of oral trichomoniasis in dogs is approximately 15-25 %, although the prevalence varies among different populations and depends on age, sex and the health of the oral cavity. CASE PRESENTATION A case of mand...

The genomes of the related crenarchaea Pyrobaculum aerophilum and Thermoproteus tenax lack any obvious gene encoding a single-stranded DNA binding protein (SSB). SSBs are essential for DNA replication, recombination, and repair and are found in all other genomes across the three domains of life. These two archaeal genomes also have only one identifiable gene encoding a chromatin protein (the Al...