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Invasion by bacteria can influence the course of healing of wounds acquired in aquatic environment. In this study, the bacteria present in Potamotrygon motoro stingray mucus and in the Alto Paraná river water were identified, and their ability to induce tissue injury and resist antibiotics was determined. Biochemical identification analysis showed that 97% of all bacterial isolates were Gram negative,...
Bacterial cellulose (BC) is a natural and biocompatible material with unique properties, such as high water holding capacity, ultra-fine fibre network and high strength that makes it an attractive material for the repair of articular cartilage lesions. However, data on the tribological properties of BC is very scarce, particularly if natural articular cartilage is involved in the contact. In this...
This paper describes recent results from an ongoing measurement and modeling effort investigating shallow grazing angle acoustic detection of targets buried under a rippled bottom. The measurements are being performed in a 13.7-m deep, 110-m long, 80-m wide test-pool with a 1.5-m layer of sand on the bottom. The rippled bottom is formed by scraping the sand with a machined rake. A parametric sonar...
This paper describes recent results from an ongoing modeling and measurement effort investigating shallow grazing angle acoustic detection of targets buried in sand. The measurements were performed in a 13.7-m deep, 110-m long, 80-m wide test-pool with a 1.5-m layer of sand on the bottom. A silicone-oil-filled target sphere was buried under a rippled surface with contours formed by scraping the sand...
In FY 2002, the Office of Naval Research (ONR) initiated a project to provide a deliberate capability for hunting buried sea mines. The objectives and approaches for this buried minehunting (BMH) project and the sensor technologies being pursued have been reported. In this paper, we describe progress and current status of this project, including developments in sensors, platforms, system concepts,...
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