Chemistry: electrical and wave energy – Processes and products
Patent
1988-02-22
1988-12-06
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204403, 204415, 435 29, G01N 2730, G01N 2754
Patent
active
047894369
ABSTRACT:
A device for in situ, nondestructive measurement of photosynthesis in live plants and photosynthetic microorganisms is disclosed which comprises a Clark-type oxygen electrode having a substantially transparent cathode comprised of an optical fiber having a metallic grid microetched onto its front face and sides, an anode, a substantially transparent electrolyte film, and a substantially transparent oxygen permeable membrane. The device is designed to be placed in direct contact with a photosynthetic portion of a living plant, and nondestructive, noninvasive measurement of photosynthetic oxygen production from the plant can be taken by passing light through the fiber-optic cathode, transparent electroyte and transparent membrane, and onto the plant so that photosynthesis occurs. The oxygen thus produced by the plant is measured polargraphically by the electrode. The present invention allows for rapid, nondestructive measurements of photosynthesis in living plants in a manner heretofore impossible using prior art methods.
REFERENCES:
patent: 2913386 (1959-11-01), Clark, Jr.
patent: 4076596 (1978-02-01), Connery et al.
patent: 4576705 (1986-03-01), Kondo et al.
Delieu et al., New Phytol. 89:165-178 (1981), "Polarographic Measurement of Photosynthetic Oxygen Evolution by Leaf Discs".
Phelan et al., American Lab., Jul. 1982:65-72, "A Maintenance-Free Dissolved Oxygen Monitor".
Friese, J. Electroanal. Chem. 106:409-412 (1980), "A New Type of Clark Oxygen Electrode".
Ley et al., Biochimica et Biophysica Acta. 680:95-106 (1982), "Absolute Absorption Cross-Sections for Photosystem II and the Minimum Quantum Requirement for Photosynthesis in Chlorella Vulgaris".
Hale et al., J. Electroanal. Chem., 107:281-294 (1980), "Some Considerations of the Steady-State and Transient Behavior of Membrane-Covered Dissolved Oxygen Detectors".
Hamel Stephen D.
Hightower Judson R.
Kaplan G. L.
The United States of America as represented by the United States
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