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C J Austin

Publications and source records attributed to C J Austin.

12 recordsLinked to original sources
PubMed1983

Induced division synchrony in Entamoeba histolytica. Effects of hydroxyurea and serum deprivation.

Synchronous growth of axenic Entamoeba histolytica was induced by nutritional deprivation and/or hydroxyurea. Axenic amebae maintained in 2% serum culture medium for 17-25 hours and returned to complete TP-S-1 (10% serum) medium showed a single synchronous cycle with a mean division time of 8.8 hours and a synchrony index of 0.47. Exposure to 10 mM hydroxyurea for 20-26 hours induced a single synchronous cycle with a division time of 3.0 hours and a synchrony index of 0.85. Hydroxyurea was toxic to 56% of the cells in the culture. The control generation time in TP-S-1 medium was 14.8 hours. Cells maintained for 44 hours in a nucleotide-deficient medium followed by a 10 mM hydroxyurea treatment exhibited two synchronous cycles. The first cycle had a generation time of 5.0 hours, a division time of 2.2 hours, and a synchrony index of 0.84.

Animals↗
PubMed1969

Time-shared computing. Implications for medical libraries.

Many library data processing systems are unresponsive to the needs of librarians because of the necessity to batch-process transactions in a computer center. Such systems tend to be reportoriented rather than information-oriented with resultant problems in the timeliness of information. Time-shared computing permits multiple users to process jobs simultaneously through on-line interaction with the computer. Such systems offer to the librarian the advantages of immediate access to information, costs shared with other users, and direct man-machine interaction. This tutorial paper describes time-shared systems with applications in the library. Problems concerning the cost and present state-of-the-art of time-sharing are discussed.

Cataloging↗
PubMedDate not supplied

Monocular congenital cataracts: psychological effects of treatment.

Visual success in the treatment of monocular congenital cataracts requires early surgery, and aggressive, long-term amblyopia management and optical correction. These children will have their only normally seeing eye patched for a significant percentage of their early childhood years. We have been concerned about the possibility of an adverse psychological impact of this form of treatment. This study utilized two standardized testing instruments to evaluate the incidence of developmental delay and behavioral problems in children treated for monocular congenital cataracts. A total of 22 children were evaluated with one or both of these instruments and compared to a control group of 18 normal siblings. There was no statistically significant evidence of developmental delay or increased behavioral problems in the treatment group.

Amblyopia↗