Fluorescence line narrowing study of the ground-state and first-excited-state vibrational frequencies of Sn and Zn cytochromesc

1995 ◽  
Vol 1 (6) ◽  
pp. 413-421 ◽  
Author(s):  
Monique Laberge ◽  
Jane M. Vanderkooi
Keyword(s):  
Excited State ◽  
Ground State ◽  
Vibrational Frequencies ◽  
Line Narrowing ◽  
First Excited State ◽  
Fluorescence Line ◽  
Fluorescence Line Narrowing

Excited state absorption and fluorescence line narrowing studies of Cm3+ in LuPO4

1996 ◽  
Vol 105 (7) ◽  
pp. 2539-2546 ◽  
Author(s):  
K. M. Murdoch ◽  
N. M. Edelstein ◽  
L. A. Boatner ◽  
M. M. Abraham
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Line Narrowing ◽  
Fluorescence Line ◽  
Fluorescence Line Narrowing

A meta-analysis and review examining a possible role for oxidative stress and singlet oxygen in diverse diseases

2017 ◽  
Vol 474 (16) ◽  
pp. 2713-2731 ◽  
Author(s):  
Athinoula L. Petrou ◽  
Athina Terzidaki
Keyword(s):  
Oxidative Stress ◽  
Excited State ◽  
Singlet Oxygen ◽  
Ground State ◽  
Meta Analysis ◽  
Common Mechanism ◽  
High Electron ◽  
A Value ◽  
First Excited State

From kinetic data (k, T) we calculated the thermodynamic parameters for various processes (nucleation, elongation, fibrillization, etc.) of proteinaceous diseases that are related to the β-amyloid protein (Alzheimer's), to tau protein (Alzheimer's, Pick's), to α-synuclein (Parkinson's), prion, amylin (type II diabetes), and to α-crystallin (cataract). Our calculations led to ΔG≠ values that vary in the range 92.8–127 kJ mol−1 at 310 K. A value of ∼10–30 kJ mol−1 is the activation energy for the diffusion of reactants, depending on the reaction and the medium. The energy needed for the excitation of O2 from the ground to the first excited state (1Δg, singlet oxygen) is equal to 92 kJ mol−1. So, the ΔG≠ is equal to the energy needed for the excitation of ground state oxygen to the singlet oxygen (1Δg first excited) state. The similarity of the ΔG≠ values is an indication that a common mechanism in the above disorders may be taking place. We attribute this common mechanism to the (same) role of the oxidative stress and specifically of singlet oxygen, (1Δg), to the above-mentioned processes: excitation of ground state oxygen to the singlet oxygen, 1Δg, state (92 kJ mol−1), and reaction of the empty π* orbital with high electron density regions of biomolecules (∼10–30 kJ mol−1 for their diffusion). The ΔG≠ for cases of heat-induced cell killing (cancer) lie also in the above range at 310 K. The present paper is a review and meta-analysis of literature data referring to neurodegenerative and other disorders.

Luminescence and fluorescence line narrowing studies of Y3Al5O12:Mn4+

1986 ◽  
Vol 36 (2) ◽  
pp. 93-100 ◽  
Author(s):  
J.F. Donegan ◽  
T.J. Glynn ◽  
G.F. Imbusch ◽  
J.P. Remeika
Keyword(s):  
Line Narrowing ◽  
Fluorescence Line ◽  
Fluorescence Line Narrowing
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