Time-Resolved Monitoring of Flash-Induced Changes of Fluorescence Quantum Yield and Decay of Delayed Light Emission in Oxygen-Evolving Photosynthetic Organisms†

Biochemistry ◽  
2001 ◽  
Vol 40 (1) ◽  
pp. 173-180 ◽  
Author(s):  
R. Steffen ◽  
G. Christen ◽  
G. Renger
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Light Emission ◽  
Time Resolved ◽  
Delayed Light Emission ◽  
Photosynthetic Organisms ◽  
Induced Changes ◽  
Oxygen Evolving

Über die prompte und verzögerte Fluoreszenz des Chlorophylls während der Photomorphogenese des photosynthetischen Apparates grüner Pflanzen / The Prompt and Delayed Light Emission of Chlorophyll During Photomorphogenesis of the Photosynthetic Apparatus of Green Plants

1972 ◽  
Vol 27 (10) ◽  
pp. 1202-1204 ◽  
Author(s):  
Robert Bauer ◽  
Ulrich F. Franck
Keyword(s):  
Light Emission ◽  
Electron Flow ◽  
Photosynthetic Apparatus ◽  
Anaerobic Conditions ◽  
Ps Ii ◽  
Delayed Light Emission ◽  
Ps I ◽  
Active Electron ◽  
Induced Changes ◽  
Kautsky Effect

The greening process of etiolated bean and maize leafs was followed by measuring the prompt and delayed light emission of chlorophyll. Above all it was concluded that the development of photosynthetic Systems I and II could be observed by studying the formation of the Kautsky -effect. First light-induced changes in the chlorophyll fluorescence intensity do not occur until 2,5 h of irradiation. It could be shown that they reflect the function of PS II reaction centers and under anaerobic conditions the electron flow between PS II and PS I. Full active electron flow from water to NADP is first to presume with the appearence of all characteristics of the Kautsky -effect (O—I—D—P curve at 3 h of irradiation).

Syntheses and photochemical properties of a tribenzo-naphtho-condensed porphyrazinatozinc complex

2003 ◽  
Vol 07 (09) ◽  
pp. 630-636 ◽  
Author(s):  
Marcelo M. M. Pelisson ◽  
Fernanda M. Tomé ◽  
Milton Beltrame ◽  
Andreza R. Simioni ◽  
Antonio C. Tedesco
Keyword(s):  
Spectral Analysis ◽  
Steady State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Spectroscopic Analysis ◽  
Time Resolved ◽  
H Nmr ◽  
Elemental Analyses ◽  
Photochemical Properties ◽  
Triplet Lifetime

The synthesis of a zinc derivative of tribenzonaphthoporphyrazinato ( Zn -tri- PcNc ) obtained from 6-carboxymethyl-2,3-dicyanonaphthalene and phthalonitrile is described. This new phthalocyanine ( Pc ) compound was characterized by 1 H NMR, elemental analyses, IR and UV-vis. The spectroscopic analysis of this compound show an electronic spectrum in DMSO with characteristic bands in the Soret and ϱ region. Steady state and time-resolved spectral analysis revealed a fluorescence quantum yield and a fluorescence lifetime of Φf=0.22 and τf = 2.56 ns respectively, in agreement with other Pc derivatives. This compound also shows a triplet lifetime in air satured solutions of 1.06 μs and a transient with the maximum absortion located at 610 nm, 120 nm shifted to the red compared to the triplet observed by other Pc compounds.

Analysis of 0.13 μm CMOS Technology Using Time Resolved Light Emission

2004 ◽  
Author(s):  
Peter Ouimet ◽  
Jason Goertz ◽  
Olivier Rinaudo ◽  
Lousinda Long ◽  
Simon Yeung
Keyword(s):  
Light Emission ◽  
Cmos Technology ◽  
Case Histories ◽  
Time Resolved ◽  
Scan Chain

Abstract This paper describes case histories of 0.13 um bulk CMOS technology analyses using Time Resolved Light Emission (TRLEM). Using this technique, scan chain, timing, and logic failures are shown to be quickly and decisively identified thereby meeting the need for rapid feedback on 1st silicon failures and process excursions.

scholarly journals Synthesis of carbon nitride oligomer as a precursor of melon with improved fluorescence quantum yield

2021 ◽  
Vol 2 (18) ◽  
pp. 6083-6093
Author(s):  
Yuto Miyake ◽  
Goichiro Seo ◽  
Kotaro Matsuhashi ◽  
Noriyuki Takada ◽  
Kaname Kanai
Keyword(s):  
Optical Properties ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Carbon Nitride

Melem tetramer, the newly synthesized carbon nitride compound is composed of oligomers with four melem units, is stable in air, and has improved optical properties compared to melon.

UV-Trained and Metal-Enhanced Fluorescence of Biliverdin and Biliverdin Nanoparticles

Nanoscale ◽  
2021 ◽  
Author(s):  
Parinaz Fathi ◽  
Ayman Roslend ◽  
Kritika Mehta ◽  
Parikshit Moitra ◽  
Kai Zhang ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Biomedical Imaging ◽  
Enhanced Fluorescence ◽  
Metal Enhanced Fluorescence

Increasing the fluorescence quantum yield of fluorophores is of great interest for in vitro and in vivo biomedical imaging applications. At the same time, photobleaching and photodegradation resulting from continuous...

Internal Conversion with 3,5-Dimethyl-4-(methylamino)benzonitrile in Alkane Solvents

2000 ◽  
Vol 214 (11) ◽  
Author(s):  
I. Rückert ◽  
A. Hebecker ◽  
A.B.J. Parusel ◽  
K.A. Zachariasse
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Internal Conversion ◽  
Alkane Solvents

With 3,5-dimethyl-4-(methylamino)benzonitrile (MHD) in n-hexane and n-hexadecane at 25°C, relatively small values are obtained for the fluorescence quantum yield Φ

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