Simple Apparatus for Diluting and Dispensing Trace Concentrations of Ethylene in Air1

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Abstract
Prolonged physiological studies using gas mixtures containing μl/liter levels of a specific gas component (e.g. ethylene or propylene) require a flowthrough system to ensure that the plant or plant part under study is exposed to a relatively constant gas concn. This prevents tissue incorporations and/or emanations (e.g. biosynthesis of ethylene or CO2) from altering the physiological effective gas concn (1).

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