Screening for Mutants Deficient in State Transitions Using Time-Resolved Imaging Spectroscopy of Chlorophyll Fluorescence

1995 ◽  
pp. 2619-2622
Author(s):  
John F. Allen ◽  
Sylvain L. Dubé ◽  
Paul A. Davison
Keyword(s):  
Chlorophyll Fluorescence ◽  
Imaging Spectroscopy ◽  
State Transitions ◽  
Time Resolved ◽  
Time Resolved Imaging

scholarly journals TIME-RESOLVED IMAGING SPECTROSCOPY OF PLANT ADAPTATIONS TO CHANGES IN THE LIGHT ENVIRONMENT AND APPLICABILITY TO SCREENING MUTANTS

HortScience ◽  
1994 ◽  
Vol 29 (4) ◽  
pp. 249b-249
Author(s):  
Sylvain L. Dubé ◽  
John F. Allen
Keyword(s):  
Energy Balance ◽  
Physiological State ◽  
Imaging Spectroscopy ◽  
State Transitions ◽  
Time Resolved ◽  
Growth And Survival ◽  
Plant Adaptations ◽  
Physico Chemical ◽  
Time Resolved Imaging ◽  
Kinetics Of

Photosynthesis, a major determinant in growth and survival of plants, is very sensitive to the energy balance of the processes triggered by the physico-chemical environment. It is, therefore, an excellent indicator of the plants' physiological state. Fundamental events in photosynthesis can be studied non-invasively and non-destructively by examining there-emission of absorbed light energy as chlorophyll a fluorescence. In this study we present digitized consecutive images of fluorescence of intact leaves of Arabidopsis sp. The relative intensity and kinetics of fluorescence of several AOI (areas of interests) of each image have been analyzed and compared. We demonstrate the feasibility of this technique for studying the physiology of light adaptations (state-transitions) of several organisms simultaneously and its applicability in indentifying mutants. Implications of this technique to the horticulture industry will be discussed.

scholarly journals First Frequency-time-resolved Imaging Spectroscopy Observations of Solar Radio Spikes

2021 ◽  
Vol 917 (2) ◽  
pp. L32
Author(s):  
Daniel L. Clarkson ◽  
Eduard P. Kontar ◽  
Mykola Gordovskyy ◽  
Nicolina Chrysaphi ◽  
Nicole Vilmer
Keyword(s):  
Solar Radio ◽  
Imaging Spectroscopy ◽  
Time Resolved ◽  
Time Resolved Imaging

scholarly journals Time-Resolved Imaging Spectroscopy of Radiation Behind Strong Shock Waves in Air

1996 ◽  
Vol 16 (1Supplement) ◽  
pp. 261-264
Author(s):  
Toshihiro MORIOKA ◽  
Yoshiki MATSUURA ◽  
Nariaki SAKURAI ◽  
Jorge KOREEDA ◽  
Kazuo MAENO ◽  
...  
Keyword(s):  
Shock Waves ◽  
Imaging Spectroscopy ◽  
Strong Shock ◽  
Time Resolved ◽  
Time Resolved Imaging ◽  
Strong Shock Waves

scholarly journals Giant enhancement of THz-frequency optical nonlinearity by phonon polariton in ionic crystals

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yao Lu ◽  
Qi Zhang ◽  
Qiang Wu ◽  
Zhigang Chen ◽  
Xueming Liu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Optical Nonlinearity ◽  
Ionic Crystals ◽  
Nonlinear Optical Susceptibility ◽  
Time Resolved ◽  
Light Coupling ◽  
Tremendous Progress ◽  
Fundamental Research ◽  
Ionic Contribution ◽  
Time Resolved Imaging

AbstractThe field of nonlinear optics has grown substantially in past decades, leading to tremendous progress in fundamental research and revolutionized applications. Traditionally, the optical nonlinearity for a light wave at frequencies beyond near-infrared is observed with very high peak intensity, as in most materials only the electronic nonlinearity dominates while ionic contribution is negligible. However, it was shown that the ionic contribution to nonlinearity can be much larger than the electronic one in microwave experiments. In the terahertz (THz) regime, phonon polariton may assist to substantially trigger the ionic nonlinearity of the crystals, so as to enhance even more the nonlinear optical susceptibility. Here, we experimentally demonstrate a giant second-order optical nonlinearity at THz frequency, orders of magnitude higher than that in the visible and microwave regimes. Different from previous work, the phonon-light coupling is achieved under a phase-matching setting, and the dynamic process of nonlinear THz generation is directly observed in a thin-film waveguide using a time-resolved imaging technique. Furthermore, a nonlinear modification to the Huang equations is proposed to explain the observed nonlinearity enhancement. This work brings about an effective approach to achieve high nonlinearity in ionic crystals, promising for applications in THz nonlinear technologies.

scholarly journals Time-resolved imaging refractometry of microbicidal films using quantitative phase microscopy

2011 ◽  
Vol 16 (12) ◽  
pp. 120510 ◽  
Author(s):  
Matthew T. Rinehart ◽  
Tyler K. Drake ◽  
Francisco E. Robles ◽  
Lisa C. Rohan ◽  
David Katz ◽  
...  
Keyword(s):  
Time Resolved ◽  
Quantitative Phase ◽  
Phase Microscopy ◽  
Quantitative Phase Microscopy ◽  
Time Resolved Imaging
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