Dr. Theisen is no stranger to fluorescence. Over 15 years with the U.S.G.S., rising from electronics tech to Project Chief, he learned fluorescence measurements and remote sensing applications from the inside out.

Following that, Dr. Theisen completed a doctorate at the University of New Hampshire, studying plant physiology using fluorescence.

Dr. Theisen studied induced plant stress as Principal Investigator, DOE at WDW/Epcot, beta tested an Aerodyne Research fluorescence instrument, reestablished the fluorescence laboratory at the USACOE, Ft Belvoir, and was a two year NRC appointee at NASA, Stennis.

Dr. Theisen formed PhytoPhotonics to provide laboratory and field measurements and other services for companies including MITRE Corporation, SAIC, and Avian Technologies.

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