Steve Edgington

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Temperatures obtained from early Cassini infrared observations of Titan show a stratopause at an altitude of 310 kilometers (and 186 kelvin at 15 degrees S). Stratospheric temperatures are coldest in the winter northern hemisphere, with zonal winds reaching 160 meters per second. The concentrations of several stratospheric organic compounds are enhanced at(More)
A symbiotic bacterium, strain IMI 397775(T), was isolated from the insect-pathogenic nematode Steinernema australe. On the basis of 16S rRNA gene sequence similarity, this bacterial isolate was shown to belong to the genus Xenorhabdus, in agreement with the genus of its nematode host. The accurate phylogenetic position of this new isolate was defined using(More)
Stratospheric temperatures on Saturn imply a strong decay of the equatorial winds with altitude. If the decrease in winds reported from recent Hubble Space Telescope images is not a temporal change, then the features tracked must have been at least 130 kilometers higher than in earlier studies. Saturn's south polar stratosphere is warmer than predicted from(More)
Ultraviolet spectra obtained with the Hubble Space Telescope identified at least 10 molecules and atoms in the perturbed stratosphere near the G impact site, most never before observed in Jupiter. The large mass of sulfur-containing material, more than 10(14) grams in S2 alone, indicates that many of the sulfur-containing molecules S2, CS2, CS, H2S, and S+(More)
Oil-based formulated conidia sprayed on steel plates and conidia powder (control) of Beauveria bassiana isolate IMI 386243 were stored at temperatures from 10 to 40 degrees C in desiccators over saturated salt solutions providing relative humidities from 32 to 88%, or in hermetic storage at 40 degrees C, and moisture contents in equilibrium with 33 or 77%(More)
A new Heterorhabditis species of entomopathogenic nematode was isolated from soil of the Atacama Desert in Chile. The new species is characterized by morphometrics of the infective juvenile (IJ) with length (L) = 611 (578-666) μm, head to excretory pore length (EP) = 115 (101-126) μm, tail = 69 (62-79) μm long, (EP/tail) × 100 (E%) = 165 (149-182) and(More)
AIM To examine whether isolates of the entomopathogenic fungus Beauveria bassiana are more closely associated to their summer hosts compared with overwintering hosts, with recently developed molecular tools based on mitochondrial regions. METHODS AND RESULTS Primers for the traditional ITS1-5.8S-ITS2 region and two mitochondrial intergenic regions,(More)
the Cassini spacecraft flew between the sun and Saturn on a trajectory such that the zero phase point passed through the rings. This event was recorded by the Visual and Infrared Mapping Spectrometer (VIMS) aboard the spacecraft and a number of spectral image cubes (0.4<<5.2m) were obtained that showed the opposition point as it transited the rings (Fig1).(More)
In a companion paper [1] the Cassini VIMS observations of the transit of Saturn's rings by the zero phase point and the method of extracting phase curves of the opposition effect (OE) are described. We fitted a theoretical equation [2] that interprets the phase curves as a coherent backscatter opposition effect to the data. Figure 1 shows a typical fit, in(More)
Introduction: The Cassini Composite Infrared Spectrometer (CIRS) obtained spatially resolved temperature scans of Saturn's main rings (A, B and C, and Cassini Division) that show ring temperatures decreasing with increasing solar phase angle (the change of sun-ring-spacecraft angle) on both the sunlit and backlit sides of the rings [1]. These temperature(More)