Thomas W. Thompson

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To determine the distribution of pathogens on cattle hides at the feedlot, samples were collected from six hide surface locations (back, flank, hock, neck, perineum, and ventrum), the oral cavity, the rectal-anal junction, and the feces of feedlot cattle and subjected to Escherichia coli 0157 detection via culture methods and to Salmonella detection via(More)
Radar measurements at 70 cm and 7.5 m wavelengths provide insight into the structure and chemical pro@.ies of the upper 5-100 m of the lunar regolith and crust. Past work has identified a number of anomalous regions and changes in echo strength, some attributed to differences in titanium content. There has been little opportunity, however, to compare(More)
Earth-based radar altimetry data for the northern equatorial belt of Mars (6øS-23øN) have recently been reduced to a common basis corresponding to the 6.1-mbar reference surface. A first look at these data indicates that the elevations of Tharsis, Elysium, and Lunae Planum are lower (by 2-5 km) than has been suggested by previous estimates. These(More)
Surface imagery of ocean waves under Hurricane Gloria (September 1976) has been obtained with an airborne synthetic-aperture imaging radar. Observations were obtained over most of the area within a radius of 150 kilometers around the center of the eye. These direct observations made it possible to derive the wave patterns in the region around a hurricane(More)
Recently completed high-resolution radar maps of the moon contain information on the decimeter-scale structure of the surface. When this information is combined with eclipse thermal-enhancement data and with high-resolution Lunar Orbiter photography, the surface morphology is revealed in some detail. A geological history for certain features and subareas(More)
Rapid enzyme-linked immunosorbent assays (ELISAs) are approved for detection of Escherichia coil O157 in beef products. However, these kits have also been used in the industry to detect this pathogen on hides or in feces of cattle, although this use has not been validated. The objective of this study was to compare commercially available ELISAs (E. coli(More)