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'Delayed Fluorescence' in keywords
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1998 (1)
1980 (1)
1978 (2)
1Author    P. V. Sane, T. S. Desai, V. G. TatakeRequires cookie*
 Title    Luminescence from Photosystem I at High Temperatures  
 Abstract    The changes in the fluorescence and delayed fluorescence intensity of spinach leaf as affected by temperature were studied. It was observed that the delayed fluorescence showed a maximum at about 45 °C whereas the fluorescence maximum was at about 55 °C. An examination of the emission spectra of delayed fluorescence at different temperatures showed that at higher tem­ peratures the relative emission at 735 nm was increased. It is argued that at higher temperatures the luminescence from photosystem I contributes to delayed fluorescence. 
  Reference    Z. Naturforsch. 35c, 289—292 (1980); received November 1 1979 
  Published    1980 
  Keywords    Fluorescence, Delayed Fluorescence, Photosystem I 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0289.pdf 
 Identifier    ZNC-1980-35c-0289 
 Volume    35 
2Author    Shozi Yamashita, Giiti TomitaRequires cookie*
 Title    The Delayed Fluorescence of Indole in Alcohol-Alkane Mixed Glasses at 77 K  
 Abstract    Using a phosphoroscope and a pulsed light-signal integrator, the effect of alcohol on the delayed fluorescence of indole was investigated in alcohol-isopentane mixed glasses at 77 K. The delayed fluorescence intensity was strongly depended on the alcohol concen-tration and the polarity of alcohol. Trapped electrons causing the delayed fluorescence were separated into two species utilizing the scavenge effect of CCI4; shallow trapped-electrons sensitive to CCI4 and deep trapped-electrons insensitive to CCI4. The former electrons seem to be responsible for the delayed fluorescence at low alcohol concentrations, whereas the latter for the delayed fluorescence at higher alcohol concentrations. The delayed fluorescence decayed exponentially at low alcohol concentrations, but it decayed with the Debye-Edwards law of t" 1 at higher alcohol concentrations. The recombination mechanism of trapped electrons with parent cations was discussed. The structure of shallow traps was also estimated. 
  Reference    Z. Naturforsch. 33b, 1136—1141 (1978); received March 29 1978 
  Published    1978 
  Keywords    Delayed Fluorescence, Indole, Trapped Electron, Trapping State 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1136.pdf 
 Identifier    ZNB-1978-33b-1136 
 Volume    33 
3Author    JaneM. Bowes, AntonyR. CroftsRequires cookie*
 Title    Interactions of Protons with Transitions of the Watersplitting Enzyme of Photosystem II as Measured by Delayed Fluorescence  
 Abstract    By measuring ms delayed fluorescence emission, we have investigated the interaction of protons in the reactions of the watersplitting enzyme of photosystem II. (1) In the presence of the electron transport mediators 2,3,5,6-tetramethyl-p-phenylene diamine (DAD) (in its reduced form) and methyl viologen and of 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU), the maximal intensity of the delayed fluorescence measured between 1 and 1.5m s after illumination was greater than the level reached in the presence of DCMU alone. (2) The stimulation of the delayed fluorescence was greater when the suspension was pre­ 
  Reference    Z. Naturforsch. 33c, 271 (1978); received February 13 1978 
  Published    1978 
  Keywords    Photosystem II, Watersplitting, Protons, Delayed Fluorescence 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0271.pdf 
 Identifier    ZNC-1978-33c-0271 
 Volume    33 
4Author    F. Rank Terjung, K. Arlheinz, M. AierRequires cookie*
 Title    Nonphotochemical Quenching of Chlorophyll Fluorescence in Higher Plant Leaves Studied by Delayed Fluorescence Decay Measurements  
 Abstract    Delayed chlorophyll fluorescence decay measurements on the second time scale were ap­ plied to investigate the state of photosystem II under different photosynthetic conditions. Leaves adapted to high and low light intensities were used to study the effects of nonphoto­ chemical quenching (energy quenching) on the photosynthetic state. 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCM U)-treated leaves were used to characterize the photosynthetic state in the absence of a transthylakoid ApH, dithiothreitol (D TT)-treated leaves in the absence of the xanthophyll zeaxanthin. The fast decay components were the most affected by energy quenching as indicated by increased decay times. The slowest decay com ponent was hardly affected, neither in amplitude nor in decay time. The measurem ents indicate a relaxation of energy quenching on the second time scale and the absence of damages in the electron transfer chain of PS II. The constant decay times of the DTT-treated leaf, com parable to those of the DCM U-treated leaf, indicate the obligatory role of zeaxanthin for most of the detected energy quenching. 
  Reference    Z. Naturforsch. 53c, 27—32 (1998); received October 9/October 31 1997 
  Published    1998 
  Keywords    Delayed Fluorescence, Energy Quenching, Pisum sativum, Xanthophyll Cycle 
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 TEI-XML for    default:Reihe_C/53/ZNC-1998-53c-0027.pdf 
 Identifier    ZNC-1998-53c-0027 
 Volume    53