scholarly journals Correlations between delayed fluorescence of chlorophyll, metabolism and yield of plants. II. Influence of moisture of leaf and temperature condition on delayed fluorescence of leaves

2010 ◽  
Vol 01 (01) ◽  
pp. 52-57 ◽  
Author(s):  
Armen B. Avagyan
Keyword(s):  
Delayed Fluorescence ◽  
Chlorophyll Metabolism ◽  
Delayed Fluorescence Of Chlorophyll

scholarly journals The nature of PSII reactions stability under oxidative stress

2019 ◽  
Vol 48 (4) ◽  
pp. 1029-1035
Author(s):  
Jeyhuna Jafarova ◽  
Rena Ganiyeva ◽  
Sona Bayramova ◽  
Ralphreed Gasanov
Keyword(s):  
Oxidative Stress ◽  
Methyl Viologen ◽  
Delayed Fluorescence ◽  
Chl A ◽  
Transport Chain ◽  
Induction Pattern ◽  
Fluorescence Characteristics ◽  
Common Nature ◽  
High Intensity Light ◽  
Delayed Fluorescence Of Chlorophyll

Comparative investigations of millisecond delayed fluorescence of chlorophyll a (msec-DF Chl a) characteristics under oxidative stress induced separately by high intensity light and methyl viologen (MV) were investigated in pumpkin leaves (Cucurbita pepo L.). The inactivation of electron transport chain of PSII was observed in both experiments. The restoration of given characteristics observed at normal illumination with photoinhibited seedlings was found to enhance under action Na-ascorbate (Na-asc). The restoration of fluorescence characteristics on treated MV seedlings was recorded only at presence of Na-asc. Effect of Naasc to restore inactivated processes is considered to be due to its ability to actively neutralize reactive forms of oxygen generated under oxidative stress. It is suggested that mechanism leading to changes of induction pattern of msec-DF Chl a of PSII has common nature in both cases.

Delayed Fluorescence of Chlorophyll In Vitro and In Vivo

Nature ◽  
1966 ◽  
Vol 210 (5037) ◽  
pp. 701-703 ◽  
Author(s):  
C. A. PARKER ◽  
THELMA A. JOYCE
Keyword(s):  
Delayed Fluorescence ◽  
Delayed Fluorescence Of Chlorophyll

Solvent Dependence of Structural Dynamics and Spin-flip Processes in 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (ortho-3CzBN)

2020 ◽  
Author(s):  
Masaki Saigo ◽  
Kiyoshi Miyata ◽  
Hajime Nakanotani ◽  
Chihaya Adachi ◽  
Ken Onda
Keyword(s):  
Dft Calculations ◽  
Excited States ◽  
Structural Changes ◽  
Photophysical Properties ◽  
Delayed Fluorescence ◽  
Time Resolved ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Solvent Dependence ◽  
Acetonitrile Solutions

We have investigated the solvent-dependence of structural changes along with intersystem crossing of a thermally activated delayed fluorescence (TADF) molecule, 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (o-3CzBN), in toluene, tetrahydrofuran, and acetonitrile solutions using time-resolved infrared (TR-IR) spectroscopy and DFT calculations. We found that the geometries of the S1 and T1 states are very similar in all solvents though the photophysical properties mostly depend on the solvent. In addition, the time-dependent DFT calculations based on these geometries suggested that the thermally activated delayed fluorescence process of o-3CzBN is governed more by the higher-lying excited states than by the structural changes in the excited states.<br>

scholarly journals Understanding delayed fluorescence and triplet decays of Protoporphyrin IX under hypoxic conditions

2021 ◽  
Author(s):  
Marek Scholz ◽  
Gauthier Croizat ◽  
Jakub Pšenčík ◽  
Roman Dědic ◽  
Santi Nonell ◽  
...  
Keyword(s):  
Protoporphyrin Ix ◽  
Delayed Fluorescence ◽  
Hypoxic Conditions
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