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Relationship between Transpiration Rate and Temperature in the Mite Dermatophagoides Farinae

Larry G. Arlian and M. Michael Veselica
Physiological Zoology
Vol. 55, No. 4 (Oct., 1982), pp. 344-354
Stable URL: http://www.jstor.org/stable/30155862
Page Count: 11
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Relationship between Transpiration Rate and Temperature in the Mite Dermatophagoides Farinae
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Abstract

Determinations have been made of the permeability of the cuticle at 0.75 and 0.95 ambient water vapor activity and compared at ambient air temperatures from 15 to 47 C. When the natural log of the transpiration-rate constants or the diffusion gradient corrected rate constants are plotted against temperature, no sudden increase in permeability is observed. Rather, transpiration-rate constants increase exponentially with temperature. The relationship between transpiration-rate constants and temperature is also well described by an Arrhenius function. The results indicate a continuous increase in cuticular permeability as air temperature rises. Likewise, natural log plots of decrease in specific activity or diffusion gradient corrected specific activity yield straight lines. Plots using the Arrhenius function are not linear over the entire temperature range. An abrupt deviation occurs at what appears to be nonequilibrium or dehydrating conditions.

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