Temperature dependence of the nearly diffusion-controlled fluorescence quenching by oxygen of 9,10-dimethylanthracence in liquid solution

2001 ◽  
Vol 3 (17) ◽  
pp. 3696-3700 ◽  
Author(s):  
Masami Okamoto
Keyword(s):  
Fluorescence Quenching ◽  
Temperature Dependence ◽  
Liquid Solution ◽  
Diffusion Controlled ◽  
Quenching By Oxygen

Fluoreszenzlöschung alternierender und nicht-alternierender polycyclischer aromatischer Kohlenwasserstoffe durch Nitroverbindungen / Fluorescence Quenching of Alternant and Non-alternant Polycyclic Hydrocarbons by Nitro Compounds

1977 ◽  
Vol 32 (12) ◽  
pp. 1561-1563 ◽  
Author(s):  
M. Zander
Keyword(s):  
Electron Transfer ◽  
Fluorescence Quenching ◽  
Excitation Energy ◽  
Reduction Potential ◽  
Nitro Compounds ◽  
Polycyclic Hydrocarbons ◽  
Electron Transfer Mechanism ◽  
Diffusion Controlled ◽  
Polycyclic Aromatic ◽  
Alternant Hydrocarbons

Abstract Fluorescence Quenching of Alternant and Non-alternant Polycyclic Hydrocarbons by Nitro Compounds Fluorescence quenching of polycyclic aromatic hydro­ carbons by nitromethane or nitrobenzene in fluid solutions is due to an electron transfer mechanism. The non diffusion controlled rate constant of quenching is very much greater for alternant than for non-alternant hydrocarbons with equal singlet excitation energy. This is explained by the known more positive reduction potential of non-alternant compared to alternant hydrocarbons.

Kinetics of partly diffusion controlled reactions. I. Transient and apparent transient effect in fluorescence quenching

1978 ◽  
Vol 28 (3) ◽  
pp. 371-377 ◽  
Author(s):  
J.C. Andre ◽  
M. Niclause ◽  
W.R. Ware
Keyword(s):  
Fluorescence Quenching ◽  
Transient Effect ◽  
Diffusion Controlled ◽  
Kinetics Of

Chlorophyll fluorescence quenching by oxygen in plants

1981 ◽  
Vol 59 (2) ◽  
pp. 190-198 ◽  
Author(s):  
William Vidaver ◽  
Konrad Colbow ◽  
Gordon Hall ◽  
Silvia Wessel
Keyword(s):  
Fluorescence Quenching ◽  
Fluorescence Yield ◽  
Reaction Centers ◽  
Variable Fluorescence ◽  
Chlorophyll Fluorescence Quenching ◽  
Sensitive Phase ◽  
Feedback Regulator ◽  
Quenching By Oxygen ◽  
Bean Leaves

Three distinct phases of chlorophyll a fluorescence quenching were observed in green plants by applying O2 pressures of up to 400 atm. These phases are interpreted as indications of three different mechanisms of O2 quenching. The most sensitive phase is dependent on intersystem electron transport. For dark-adapted bean leaves this fluorescence was quenched to half the initial yield with an O2 pressure of about 3 atm. The second mechanism was observed with 3-(3,4)dichlorophenyl)-1,1-dimethylurea (DCMU), namely the quenching of variable fluorescence in leaves, chloroplasts, and green algae cells. This effect of O2 is thought to be closely associated with the photochemical system II reaction centers. Half of the variable fluorescence was quenched with about 40 atm of O2. Finally, the antennae pigments are quenched, as observed by the effect of O2 on the O-level fluorescence yield, when all photochemical system II reaction center traps are presumably open. The O2 pressure required for half-quenching in this case was about 400 atm.The possibility that the quenching of fluorescence occurs with O2 concentrations low enough for endogenous O2 to have an effect on in vivo fluorescence was investigated. We suggest that O2 quenches by competing with photochemical system I for electrons derived from water splitting, and may thus function as a feedback regulator of photosynthesis.

Kinetics of partly diffusion controlled reactions. X. Use of a high pressure cell in fluorescence quenching experiments

1982 ◽  
Vol 20 (3-4) ◽  
pp. 395-402 ◽  
Author(s):  
I. Kawenoki ◽  
J. Kossanyi ◽  
J. Y. Jezequel ◽  
J. C. Andre
Keyword(s):  
High Pressure ◽  
Fluorescence Quenching ◽  
High Pressure Cell ◽  
Pressure Cell ◽  
Diffusion Controlled ◽  
Kinetics Of

Use of solid carbon dioxide to alleviate fluorescence quenching by oxygen

1990 ◽  
Vol 62 (23) ◽  
pp. 2654-2656 ◽  
Author(s):  
Sadao. Matsuzawa ◽  
Akihiro. Wakisaka ◽  
Mitsuhisa. Tamura
Keyword(s):  
Carbon Dioxide ◽  
Fluorescence Quenching ◽  
Solid Carbon ◽  
Solid Carbon Dioxide ◽  
Quenching By Oxygen

Kinetics of Diffusion-Controlled Reactions. An Experimental Test of the Theory as Applied to Fluorescence Quenching

1966 ◽  
Vol 70 (10) ◽  
pp. 3246-3253 ◽  
Author(s):  
William R. Ware ◽  
Joel S. Novros
Keyword(s):  
Fluorescence Quenching ◽  
Experimental Test ◽  
Diffusion Controlled ◽  
Kinetics Of

Diffusion of oxygen in slices of rat brain

1983 ◽  
Vol 244 (1) ◽  
pp. R15-R22 ◽  
Author(s):  
L. D. Homer ◽  
J. B. Shelton ◽  
T. J. Williams
Keyword(s):  
Diffusion Coefficient ◽  
Fluorescence Quenching ◽  
Temperature Dependence ◽  
Rat Brain ◽  
New Method ◽  
Tissue Slices ◽  
Factors Affecting ◽  
Joint Determination ◽  
Parameter Values ◽  
Diffusion Coefficient Of Oxygen

A new method for the joint determination in tissue slices of the diffusion coefficient of oxygen (D) and the fluorescence-quenching coefficient (K') of pyrenebutyric acid (PBA) is introduced. Values of D and K' in rat brain at temperatures (Tc) from 20 to 40 degrees C were determined and referred to the values in water. D = DH2O (0.72 - 0.0074 Tc) +/- 0.079 X 10(-5) cm2/s for 80-microns slices. D = DH2O (1.01 – 0.0074 Tc) +/- 0.12 X 10(-5) cm2/s for 160-microns slices. K' = K'H2O (0.72 + 0.025 Tc) +/- 0.56 X 10(-4) mmHg-1. The temperature dependence of both these parameters in tissue is different from their temperature dependence, and comparison with parameter values obtained with other methods leads us to conclude that factors affecting the diffusion of oxygen in tissue are heterogenous rather than homogenous. The variation in the different parameters, D and K', probably exceeds a twofold range.

Kinetics of partly diffusion-controlled reactions XX: Fluorescence quenching by the nearest-neighbours model

1988 ◽  
Vol 42 (2-3) ◽  
pp. 233-239 ◽  
Author(s):  
J.C. Andre ◽  
F. Baros ◽  
A.T. Reis E Sousa
Keyword(s):  
Fluorescence Quenching ◽  
Diffusion Controlled ◽  
Nearest Neighbours ◽  
Kinetics Of
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