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Journal of Experimental Biology 61,321-329 (1974)
Published by Company of Biologists 1974

An Electrolytic, Digital Recording, Multichannel Micro-Respirometer

B. D. TURNER 1 and R. A. STEVENSON 2

1 Department of Zoology, King's College, University of London, Strand, London WC2R 2LS
2 Bioelectronics Workshop, Leeds University, Yorkshire, LS2 9JT

A 20-channel micro-respirometer is described which replaces oxygen consumed by the respiring organism by that generated by the electrolysis of saturated copper sulphate solution. Electronic circuitry checks each respirometer once every second and provides a square-wave pulse 0.1 sec long and 1.0 mA in amplitude if oxygen is required. A single pulse produces 5.7 nl of oxygen at S.T.P. Electromechanical counters record when a pulse is required for oxygen generation. Total errors introduced by the electronics amount to less than 0.1%.

Submitted on February 26, 1974






© The Company of Biologists Ltd 1974