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THE EFFECT OF SONIC VIBRATIONS ON PHAGE, PHAGE PRECURSOR, AND THE BACTERIAL SUBSTRATE
A P Krueger1, B B Brown, E J Scribner
1Department of Bacteriology, University of California, Berkeley.
The Journal of General Physiology
|October 30, 2009
Summary
Sonic waves effectively inactivate phage precursor within bacterial cells. Higher bacterial concentrations offer protection, but precursor extraction via sonication remains unsuccessful.
Area of Science:
- Microbiology
- Biophysics
Background:
- Bacteriophages (phage) are viruses that infect bacteria.
- Phage replication relies on intracellular precursors within host cells.
- Bacterial cells in a resting state can rapidly increase phage production.
Purpose of the Study:
- To describe a novel magneto-striction oscillator for sonic wave generation.
- To investigate the effect of sonic waves on phage inactivation and precursor destruction.
- To assess the influence of bacterial concentration on phage inactivation.
Main Methods:
- Utilized a 320-watt nickel tube magneto-striction oscillator producing 9,300 cycles per second sonic vibrations.
- Monitored phage inactivation rates over time as a measure of sonic energy output.
- Examined phage inactivation in the presence of varying concentrations of Staphylococcus bacteria.
- Assessed the destruction of intracellular phage precursor by sonic waves in activated bacterial cells.
Main Results:
- Phage inactivation by sonic waves follows logarithmic kinetics, correlating with energy output.
- Higher bacterial concentrations reduced the rate and extent of phage inactivation.
- Sonic waves destroyed intracellular phage precursor in activated cells within approximately 30 minutes.
- Bacterial cell counts remained unaffected until after complete precursor inactivation.
Conclusions:
- Sonic waves provide a method for measuring energy output via phage inactivation.
- Bacterial presence modulates sonic inactivation of phages and their precursors.
- Sonic waves effectively degrade intracellular phage precursors but do not extract them.
- Further research is needed to understand the mechanisms of bacterial protection against sonic waves.
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