analyses by gas chromatography of gas samples obtained from chambers containing intact etiolated pea plants exposed to 2 microliters of c ( 2 ) d ( 4 ) per liter of air for up to 5 days resulted in no detectable exchange between the deuterium atoms of c ( 2 ) d ( 4 ) and the hydrogen atoms of the tissue .
C0011744
deuterium
C0020275
hydrogen