The effect of pH upon the velocity of translatory movement of Oscillatoria formosa Bory in inorganic culture solutions was determined.
Unhindered movement occurred in the range of about pH 6.4 to 9.5. Above and below these limits inhibition was marked.
In the unfavorable acid and alkaline ranges inhibition was progressive with exposure time; in the favorable range continuous movement was maintained for 24 hours.
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Copyright, 1933, by The Rockefeller Institute for Medical Research
1933
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