Dynamic Analysis of Microbial Processes
Very tiny (capillary)
microelectrodes for dissolved oxygen can have a sensing tip as small as
0.5 µ m. We used a tip of 4 µ m with a response time of about 0.2 s. Light causes photosynthetic
evolution of oxygen. Sinusoidal forcing of light was achieved with polarizers, one of
which was rotated at a fixed angular velocity.
Tracings of response of microelectrode for dissolved oxygen
We estimated time constants for photosynthesis but failed to identify the corresponding biochemical steps.
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