Raymond N. Doetsch

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The behavior of a number of motile flagellated bacteria toward viscosity characteristics of their fluid environments was observed. All showed an increase in velocity (micrometers per second) in more viscous solutions. Velocity reached a maximum at a characteristic value, however, and thereafter decreased with higher viscosities. Peritrichously flagellated(More)
Pseudomonas marina (ATCC 27 129) rapidly aggregates when suspended in buffered artificial seawater (ASW). Light microscopic observations of stained preparations, showed that flagella-flagella contact was responsible for this phenomenon. Aggregation did not occur if flagella were sheared off, or if motility was inhibited with NaN3. Aggregates were not(More)
Halophilism has been of considerable interest since the report of Farlow (1880) on the reddening of salted fish. Any industry using either a salt packing process or a salt brine must be concerned with the control of halophiles. Considerable work has been done, therefore, with the isolation, identification, and control of these organisms. Stuart, Frey, and(More)
A method is described for obtaining a highly active proteolytic enzyme from aMicrosporum species. This protease was purified (200-fold) from a cell-free culture medium by concentration with Carbowax, ammonium sulfate fractionation, charcoal and Celite filtration, calcium phosphate gel treatment, and column chromatography. The pH and temperature optima are(More)
The translational motility of Pseudomonas fluorescens was weakly inhibited by oligomycin, Dicumarol, 2,4-dinitrophenol, 2n-heptyl-4-hydroxyquinoline N-oxide, and potassium cyanide. Atabrine and antimycin A together with potassium cyanide immediately immobilized this bacterium, but antimycin A alone was without effect. Gramicidin D also immobilized P.(More)