Molecular cloning techniques were used to construct lambda-E. coli hybrid bacteriophage carrying genes involved in bacterial flagellar motility (mot) and chemotaxis (cheA). A series of hybrid bacteriophage without each of these genes was also prepared. When paralyzed mutants of E. coli were infected with lambda that carried the mot gene, the ability of the bacterium to swim was rapidly restored...

In our everyday life, processing complex dynamic scenes such as crowds and traffic is of critical importance. Further, it is well documented that there is an age-related decline in complex perceptual-cognitive processing, which can be reversed with training. It has been suggested that a specific dynamic scene perceptual-cognitive training procedure [the three-dimensional multiple object trackin...

Visual tracking of multiple objects in a complex scene is a critical survival skill. When we attempt to safely cross a busy street, follow a ball’s position during a sporting event, or monitor children in a busy playground, we rely on our brain’s capacity to selectively attend to and track the position of specific objects in a dynamic scene. This ability to visually track simultaneously moving ...

The role of motility as a virulence factor in Pseudomonas aeruginosa burn wound sepsis was examined using mutants deficient in the Fla or Mot phenotype. Physiological profiles of parental strains and Fla- and Mot- mutants were similar with respect to antibiograms, O antigen types, growth rates, and proteolytic, exotoxin A and phospholipase activities, providing evidence for isogenicity. Lethali...

When objects are attended, which of their properties are encoded as a result? We explore this question using a ‘multiple object tracking’ (MOT) task, wherein subjects must track multiple identical and unpredictably moving items in a display filled with identical distractors. In three experiments, subjects had to report the locations, directions of motion, colors, or shapes of items in a MOT tas...