Results 81 to 90 of about 44,067 (117)

Lifetime of the long-wavelength chlorophyll fluorescence

Biochimica et Biophysica Acta, 1963
The fluorescence lifetime of chlorophyll in vivo and in vitro was measured with a phase fluorimeter. The lifetime in vivo of the long-wavelength emission (730 mμ) which appears at low temperature was 3.1 mμsec. It is concluded that this emission is fluorescence rather than phosphorescence as had been previously reported by Brody.
W L, BUTLER, K H, NORRIS
openaire   +2 more sources

Concentration Quenching of Fluorescence in Chlorophyll Solutions

Nature, 1948
IN a paper concerned chiefly with the results of measurements of the self-quenching of the fluorescence of solutions of aromatic hydrocarbons1, Weiss and Weil-Malherbe report a few measurements on the self-quenching of ethyl chlorophyllide solutions.
W F, WATSON, R, LIVINGSTON
openaire   +2 more sources

Intensity effects on the fluorescence of in vivo chlorophyll

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1977
A technique for measuring relative quantum yields of fluorescence with a picosecond streak camera is described. We show that Chlorella pyrenoidosa exhibit an intensity dependent quantum yield when irradiated with single picosecond light pulses. This effect also occurs under conditions that inhibit the activity of the reaction centres, which can ...
G, Porter, J A, Synowiec, C J, Tredwell
openaire   +2 more sources

Stimulated fluorescence and fluorescence quenching in chlorophyll a and bacteriochlorophyll a

Chemical Physics Letters, 1978
Abstract This communication deals with the photophysical processes that take place in chlorophyll solutions under intense nitrogen laser irradiation. The effect of the pump photon density on the fluorescence yield depends strongly on the geometry of the irradiation and the sampling set-up.
J.C. Hindman, R. Kugel, A. Svirmickas, J.J. Katz   +3 more
openaire   +1 more source

Carotenoid-sensitized Fluorescence of Chlorophyll in vitro

Nature, 1958
IT is well established that light absorbed by carotenoids can contribute to photosynthesis, phototaxis and the red fluorescence shown by chlorophyll A in the intact chloroplast. In Chlorella, independent measurements of both fluorescence1 and photosynthesis2 indicate a 40–50 per cent efficiency of energy transfer from β-carotene and lutein to ...
openaire   +2 more sources

Chlorophyll Fluorescence: A Probe of Photosynthesis In Vivo

Annual Review of Plant Biology, 2008
The use of chlorophyll fluorescence to monitor photosynthetic performance in algae and plants is now widespread. This review examines how fluorescence parameters can be used to evaluate changes in photosystem II (PSII) photochemistry, linear electron flux, and CO2assimilation in vivo, and outlines the theoretical bases for the use of specific ...
openaire   +3 more sources

Chlorophyll Fluorescence Transients in Chloroplasts and Leaves

1991
Photosynthesis is a complex process, the study of which requires the converging use of many experimental methods (see the Introduction in Chapter 10). As a directly detectable molecular property, fluorescence is largely used in physical chemistry. In photosynthesis, however, fluorescence is mainly (but not only) utilized as an indirect method, based on
Ducruet, J.M., Mathis, P.
openaire   +2 more sources

The Fluorescence of Chlorophyll and Photosynthesis.

The Journal of Physical Chemistry, 1941
J. Franck, C. S. French, T. T. Puck
openaire   +1 more source

Fluorescence of Chlorophyll

Botanical Gazette, 1926
openaire   +1 more source

CHLOROPHYLL FLUORESCENCE AND PHOTOSYNTHESIS: FLUORESCENCE TRANSIENTS

1971
null Govindjee, George Papageorgiou
openaire   +1 more source