Delayed Light Emission in Green Plant Meterials:Temperature-Dependence and Quantum Yield

Thumbnail image of item number 1 in: 'Delayed Light Emission in Green Plant Meterials:Temperature-Dependence and Quantum Yield'.
Thumbnail image of item number 2 in: 'Delayed Light Emission in Green Plant Meterials:Temperature-Dependence and Quantum Yield'.
Thumbnail image of item number 3 in: 'Delayed Light Emission in Green Plant Meterials:Temperature-Dependence and Quantum Yield'.
Thumbnail image of item number 4 in: 'Delayed Light Emission in Green Plant Meterials:Temperature-Dependence and Quantum Yield'.
Showing 1-4 of 28 pages in this report.

PDF Version Also Available for Download.

Description

The discovery of the delayed light emission of plant materials by Strahler and Arnold in 1951 has stimulated a good deal of interest in this rather remarkable property. The emitted light has been shown to be due to an electronic transition between the first excited singlet state of chlorophyll and the ground state. At room temperature, a luminescence is observable from about 0.01 seconds to several minutes after excitation. Thus, the electronic transition cannot be rate-determining and the process represents neither normal fluorescence nor normal phosphorescence. Indeed, there is some evidence that the decay curve of the luminescence is the … continued below

Creation Information

Tollin, G.; Fujimori, E. & Calvin, M. July 1, 1958.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 158 times. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Authors

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

About | Browse this Partner

Contact Us

Corrections Questions

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

The discovery of the delayed light emission of plant materials by Strahler and Arnold in 1951 has stimulated a good deal of interest in this rather remarkable property. The emitted light has been shown to be due to an electronic transition between the first excited singlet state of chlorophyll and the ground state. At room temperature, a luminescence is observable from about 0.01 seconds to several minutes after excitation. Thus, the electronic transition cannot be rate-determining and the process represents neither normal fluorescence nor normal phosphorescence. Indeed, there is some evidence that the decay curve of the luminescence is the resultant of more than one rate-limiting process. Strahler and co-workers have been able to demonstrate the existence of many relationships between delayed light emission and photosynthesis and thus have been led to interpret the luminescence phenomena as a consequence of the reversibility of some of the enzymatic photosynthetic reactions. Moreover, Tollin and Calvin have shown that the faster decaying components of the delayed light are present to as low a temperature as -100 C, suggesting that the early processes following light-absorption are non-enzymatic in nature. These latter observations, in conjunction with several other types of experimental and theoretical information, have suggested an interpretation of the physical processes leading to delayed light emission, and, by analogy, to photosynthesis, in terms of semiconductor theory. The earlier investigations in this laboratory have been limited to the study of the light emitted approximately 0.1 seconds after excitation by a flash discharge. The recent reports of luminescences at still shorter times after excitation have prompted the construction of a device capable of continuously observing the light emission of a sample of plant material from 0.0015 seconds to about 30 seconds after the onset of flash excitation. The present work describes a series of experiments carried out with this apparatus.

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

About | Browse this Collection

What responsibilities do I have when using this report?

Digital Files

When

Dates and time periods associated with this report.

Creation Date

  • July 1, 1958

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

Description Last Updated

  • Nov. 3, 2016, 7:50 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 158
More Statistics

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

Thumbnail image of item number 1 in: 'Delayed Light Emission in Green Plant Meterials:Temperature-Dependence and Quantum Yield'.
Thumbnail image of item number 2 in: 'Delayed Light Emission in Green Plant Meterials:Temperature-Dependence and Quantum Yield'.
Thumbnail image of item number 3 in: 'Delayed Light Emission in Green Plant Meterials:Temperature-Dependence and Quantum Yield'.
Thumbnail image of item number 4 in: 'Delayed Light Emission in Green Plant Meterials:Temperature-Dependence and Quantum Yield'.

PDF Version Also Available for Download.

Citations, Rights, Re-Use

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Links for Robots

Helpful links in machine-readable formats.

Archival Resource Key (ARK)

International Image Interoperability Framework (IIIF)

Metadata Formats

Images

URLs

Stats

Tollin, G.; Fujimori, E. & Calvin, M. Delayed Light Emission in Green Plant Meterials:Temperature-Dependence and Quantum Yield, report, July 1, 1958; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc889168/: accessed July 14, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

Back to Top of Screen