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Fig. 1. Thermolimit respirometry diagram. Simplified and not to scale. Gas streams
are denoted by thick lines, and their directions by arrowheads. Thin lines are
electrical connections. PTC, Peltier-effect temperature control cabinet
(controlled area within hatched walls); PELT-4, controller for cabinet, in
turn controlled by the adjacent computer; A, ant; AD-1, activity detector with
infrared emitter (E) and detector (D); T, thermocouple in chamber, connected
to thermocouple meter (TC1000); RC, respirometry chamber; EQ, equilibration
coil; CA, CO2 analyzer; RA, room air; DAD,
Drierite/Ascarite/Drierite drying and CO2 scrubber column; P, pump;
MFCV, mass flow control valve; MFC2, mass flow control electronics unit; UI2,
16-bit data acquisition interface attached to the adjacent computer. See text
for details.