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Biomedical subjects

M Baxter

Publications and source records attributed to M Baxter.

At least 37 records · Page 2Linked to original sources
PubMed1984

Metabolic and ultrastructural response to glucose of two eurytrophic bacteria isolated from seawater at different enriching concentrations.

Two marine bacteria, an Acinetobacter sp. (strain GO1) and a vibrio sp. (strain G1), were isolated by extinction dilution and maintained in natural seawater supplemented with nitrogen, phosphorus, and glucose at 0.01 and 10 mg of glucose carbon per liter above ambient monosaccharide concentrations, respectively. After 3 days in unsupplemented natural seawater, growth in batch culture with glucose supplements was determined by changes in cell numbers and glucose concentration. The exponential growth of the Acinetobacter strain with added glucose was indistinguishable from that in natural seawater alone, whereas that of the Vibrio strain was more rapid in the presence of glucose supplements, suggesting that the Acinetobacter strain preferred the natural organic matter in seawater as a carbon source. The ultrastructure for both isolates was unaffected by glucose supplements during exponential growth, but there were marked changes in stationary-phase cells. The Vibrio strain formed polyphosphate at 10 mg of glucose carbon per liter, whereas poly-beta-hydroxybutyrate formation occurred at 100 mg and became excessive at 1,000 mg, disrupting the cells. In contrast, the Acinetobacter strain elongated at 100 and 1,000 mg of glucose carbon per liter but failed to show poly-beta-hydroxybutyrate formation. The diversity of responses shown here would not have been detected with a single concentration of substrate, often used in the literature to characterize both pure and natural populations of marine bacteria.

Acinetobacter↗
PubMed1981

Studies in linguistic ambiguity and insecurity.

This article focuses on problems of cross-culture communication between patients and psychiatrists of varying socio-linguistic and foreign language backgrounds, in an in-patient psychiatric community facility. Issues of diagnosis, integration into the ward treatment program, and progress in the course of treatment can in some cases be traced to specific socio-linguistic problems, which have previously gone undiagnosed. The clinical impact of three types of communication breakdowns are evaluated: (1) overt language differences; (2) linguistic ambiguity; and (3) linguistic insecurity. A need exists for further research in identification and assessment of language insecurity, and for modification of therapeutic procedures to deal with inter-dialectic communication difficulties.

Black or African American↗