There have been found at least three kinds of protein m the yolk throughout the embryogenesis of rainbow trout, by electrophoretic analysis1l. In rainbow trout it is well known that the egg hatches out in 20-30 days after fertilization and the yolk content in the sac fry lasts for a further period of 20-30 days, then signs of starvation begin to appear. Therefore, it was suggested that the yolk...

The many unusual properties of the psittacowith elementary bodies. About 48 hours after sis-lymphogranuloma group of infectious agents the host cell is infected, the vesicle bursts, have made their exact taxonomic position a ruptures the cell and releases a swarm of new matter of doubt (Rake, 1953; Meyer, 1953). elementary bodies to infect fresh cells (Weiss, However, whether these intracellula...

PURPOSE To present clinical and histological features of prepubertal testicular tumors through the analysis of the long-term experiences of a single surgeon. MATERIALS AND METHODS The charts of 48 children treated for testicular tumors from 1986 to 2010 were retrospectively reviewed. All patients underwent radical orchiectomy. The patients' ages, clinical presentations, histopathological find...

Some months ago there was published from this laboratory a brief preliminary report of a method whereby tumors could be cultivated in the yolk sacs of developing chick embryos (4). Neoplasms were first injected into the yolk sac with the idea that the tumor cells would die and disintegrate, thus releasing any virus that might be present. It was hoped that if such a release occurred the medium p...