Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1995-02-23
1996-09-03
Brock, Michael J.
Measuring and testing
With fluid pressure
Porosity or permeability
47 101, G01N 1508, G01N 33483
Patent
active
055512844
ABSTRACT:
To indicate stomatal aperture in plant leaves, this instrument measures the permeability to air flow across the leaf. Air entrance and exit chambers are temporarily and non-destructively sealed on opposite sides of the leaf. The entrance chamber is pressurized while the exit chamber remains sealed as an initial test for any leakage. The exit chamber is then opened to the atmosphere and the time required for a specific volume of air to move across the leaf is measured.
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J. F. Bierhuizen et al., A Porometer for Laboratory and Field Operation, Journal of Experimental Botany, 30:1021-1034, 1965.
H. Meidner, A Simple Porometer for Measuring the Resistance to Air Flow Offered by the Stomata of Green Leaves School Sci. Rev 47:149-151, 1965.
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