Measurement of Algal Growth under Controlled Steady-state Conditions.

Abstract

An apparatus is descr. for precise measurement of growth rate of an alga as a function of intensity and intermittency of illumination. Dilution of a culture is controlled by a photometric device to a rate which maintains constant density of population and balances the growth rate. Maintenance of constant volume by an automatic siphon allows direct evaluation of the specific growth rate from the differential forms of the growth equation. Relationships of the apparatus to other steady-state growth devices are discussed.