Abstract

With combined methods of volumetry, polarography and potentiometry we studied transitory phenomena as occurring in Chlorella suspensions upon changes in light intensity. High transitory rates as observed in the volumeter were shown to be caused by anomalous carbon dioxide exchange only. During the transitory stages, the photosynthetic quotient may therefore deviate largely from minus unity. This fact must be considered if short exposures to light and darkness are used for the computation of photosynthetic quantum yields.

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