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Title: Non-focusing optics spectrophotometer, and methods of use

Abstract

In one aspect, the present invention provides kinetic spectrophotometers that each comprise: (a) a light source; and (b) a compound parabolic concentrator disposed to receive light from the light source and configured to (1) intensify and diffuse the light received from the light source, and (2) direct the intensified and diffused light onto a sample. In other aspects, the present invention provides methods for measuring a photosynthetic parameter, the methods comprising the steps of: (a) illuminating a plant leaf until steady-state photosynthesis is achieved; (b) subjecting the illuminated plant leaf to a period of darkness; (c) using a kinetic spectrophotometer of the invention to collect spectral data from the plant leaf treated in accordance with steps (a) and (b); and (d) determining a value for a photosynthetic parameter from the spectral data.

Inventors:
;
Issue Date:
Research Org.:
Washington State University Research Foundation, Pullman, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175116
Patent Number(s):
6813024
Application Number:
09/785,041
Assignee:
Washington State University Research Foundation
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
FG03 98ER20299
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Kramer, David M., and Sacksteder, Colette A. Non-focusing optics spectrophotometer, and methods of use. United States: N. p., 2004. Web.
Kramer, David M., & Sacksteder, Colette A. Non-focusing optics spectrophotometer, and methods of use. United States.
Kramer, David M., and Sacksteder, Colette A. Tue . "Non-focusing optics spectrophotometer, and methods of use". United States. https://www.osti.gov/servlets/purl/1175116.
@article{osti_1175116,
title = {Non-focusing optics spectrophotometer, and methods of use},
author = {Kramer, David M. and Sacksteder, Colette A.},
abstractNote = {In one aspect, the present invention provides kinetic spectrophotometers that each comprise: (a) a light source; and (b) a compound parabolic concentrator disposed to receive light from the light source and configured to (1) intensify and diffuse the light received from the light source, and (2) direct the intensified and diffused light onto a sample. In other aspects, the present invention provides methods for measuring a photosynthetic parameter, the methods comprising the steps of: (a) illuminating a plant leaf until steady-state photosynthesis is achieved; (b) subjecting the illuminated plant leaf to a period of darkness; (c) using a kinetic spectrophotometer of the invention to collect spectral data from the plant leaf treated in accordance with steps (a) and (b); and (d) determining a value for a photosynthetic parameter from the spectral data.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {11}
}

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Works referenced in this record:

Compound parabolic concentrator probe for efficient light collection in spectroscopy of biological tissue
journal, January 1996


The proton to electron stoichiometry of steady-state photosynthesis in living plants: A proton-pumping Q cycle is continuously engaged
journal, December 2000


The relationship between non-photochemical quenching of chlorophyll fluorescence and the rate of photosystem 2 photochemistry in leaves
journal, September 1990


Activation of the chloroplast ATPase measured by the electrochromic change in leaves of intact plants
journal, August 1989


Electron transfer between the two photosystems. I. Flash excitation under oxidizing conditions
journal, May 1984