Synthesis of infective poliovirus in BSC-1 monkey cells enucleated with cytochalasin B

BSC-1 monkey kidney cells were enucleated by two cycles of centrifugation in the presence of cytochalasin B. The resulting populations contained 99.5 percent enucleated cells. After infection, newly synthesized poliovirus was recovered from the enucleated populations. Final virus yield per enucleated cell was about one-fifth the yield per infected untreated cell

Comparison of traditional and condensed articulation tests examining the same number of sounds

The same recorded speech samples of subjects with articulation defects were presented to judges under two listening conditions. Under one condition each judge was to listen for only one sound per sample word, the traditional method for testing articulation. Under the second condition each judge was to listen for one, two, or three sounds in the various sample words, a quicker method for testing the same number of sounds. Comparisons of the results showed that there was little difference in the judges' performance under the two listening conditions. This suggests that speech pathologists can effectively evaluate more than one sound per word and that a condensed type of test will give approximately the same amount of information as the longer, traditional type of test.