Atmospheric pressure laser induced fluorescence measurements of CH in flames using B(super)2signma(super)-

2001 ◽  
Author(s):  
Jay Jeffries ◽  
Robert J.H. Klein-Douwel ◽  
Jorge Luque ◽  
Gregory P. Smith ◽  
David R. Crosley
Keyword(s):  
Atmospheric Pressure ◽  
Laser Induced Fluorescence ◽  
Fluorescence Measurements

Laser-induced fluorescence of CH and CH2O in atmospheric pressure methane/air Bunsen flames

2000 ◽  
Author(s):  
Robert Klein-Douwel ◽  
Jorge Luque ◽  
Jay Jeffries ◽  
Gregory Smith ◽  
David Crosley
Keyword(s):  
Atmospheric Pressure ◽  
Laser Induced Fluorescence ◽  
Bunsen Flames

Monitoring of cold and light stress impact on photosynthesis by using the laser induced fluorescence transient (LIFT) approach

2010 ◽  
Vol 37 (5) ◽  
pp. 395 ◽  
Author(s):  
Roland Pieruschka ◽  
Denis Klimov ◽  
Zbigniew S. Kolber ◽  
Joseph A. Berry
Keyword(s):  
Photosynthetic Efficiency ◽  
Light Stress ◽  
Pulse Amplitude ◽  
Laser Induced Fluorescence ◽  
High Light Intensity ◽  
High Light ◽  
Persea Americana ◽  
Effective Quantum Yield ◽  
Fluorescence Transient ◽  
Fluorescence Measurements

Chlorophyll fluorescence measurements have been widely applied to quantify the photosynthetic efficiency of plants non-destructively. The most commonly used pulse amplitude modulated (PAM) technique provides a saturating light pulse, which is not practical at the canopy scale. We report here on a recently developed technique, laser induced fluorescence transient (LIFT), which is capable of remotely measuring the photosynthetic efficiency of selected leaves at a distance of up to 50 m. The LIFT approach correlated well with gas exchange measurements under laboratory conditions and was tested in a field experiment monitoring the combined effect of low temperatures and high light intensity on a variety of plants during the early winter in California. We observed a reduction in maximum and effective quantum yield in electron transport for Capsicum annuum L., Lycopersicon esculentum L. and Persea americana Mill. as the temperatures fell, while a grass community was not affected by combined low temperature and high light stress. The ability to make continuous, automatic and remote measurements of the photosynthetic efficiency of leaves with the LIFT system provides a new approach for studying and monitoring of stress effects on the canopy scale.

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