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Rats were trained in a two-way shock-avoidance task, either in a single training session of 100 trials or over a 5 day period with 20 trials per day. Electroencephalograph and electromyograph recordings were continuous for 2 days prior (base line), during, and following the experiments, except during the actual training sessions. Animals that learned the(More)
A novel oxygen sensor which does not rely on electrochemical reduction has been used to measure the oxygenation of the murine sarcoma F in a comparative study with an existing polarographic electrode that is available commercially. The prototype luminescence sensor yielded an oxygen distribution comparable with readings made using a pO2 histograph. The(More)
We reviewed radiographs of the hands and wrists of 33 patients with immature skeletons and chronic renal disease. Various radiographic manifestations of renal osteodystrophy were seen, including osteopenia in 23 patients (70%), subperiosteal resorption in 20 (61%), distal tuft resorption in 14 (42%), sclerosis of vertebral bodies in 2 (6%), and soft-tissue(More)