H. L. Quinby

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Three techniques for the measurement of bacterial numbers and biomass in the marine environment are described. Two are direct methods for counting bacteria. The first employs an epifluorescence microscope to view bacteria that have been concentrated on membrane filters and stained with acridine orange. The second uses a transmission electron microscope for(More)
We performed a series of seawater culture experiments on surface mixed layer samples during the spring phytoplankton bloom in the North Atlantic Ocean. Diluted (20% unfiltered + 80% 0.22 μm filtered) and untreated “whole” seawater samples were incubated up to 40 hour and sampled periodically for cell numbers, biovolume, and incorporation of 3H-thymidine and(More)
A low nutrient medium, dilute peptone, and reduced incubation temperatures (25 or 30 degrees C) were used to recover bacteria from dental unit water supply. Significantly greater numbers of bacterial colony-forming units were recovered on the dilute peptone medium than on the enriched media, blood agar or trypticase soy agar. Lower incubation temperatures(More)
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