Results 241 to 250 of about 205,721 (300)

Fluorescence Quenching in Membrane Phase

Biochemical and Biophysical Research Communications, 1995
Membrane-related events can be investigated when the fluorescence of an intramembrane fluorophore is quenched by molecules that are dissolved in lipid phase. In this case the bimolecular quenching constant characterises the relative transport rate of the fluorophore and quencher molecules in the membrane interior and thereby it is related to the ...
Z, Lakos, A, Szarka, B, Somogyi
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Steric effect on fluorescence quenching

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2005
In this communication we have reported the steric effect on the fluorescence quenching rate constants of the electron transfer (ET) process. We have done a comparative study using donor (D)-acceptor (A) systems with different exergonicity (-deltaG(f)). Different carbazole derivatives (CZ): 1,4-dicyanobenzene (DCB) systems (-deltaG(f) = 0.7-0.8 eV) were
Suchandra, Chatterjee, Samita, Basu, Nandita, Ghosh, Manas, Chakrabarty   +3 more
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Fluorescence quenching studies with proteins

Analytical Biochemistry, 1981
Abstract A review is presented on the use of the technique of solute fluorescence quenching to study the structure and dynamics of proteins. A number of factors are discussed that must be considered in analyzing such data. Among these factors are the efficiency of the quenching process, the relative importance of static quenching, the heterogeneity ...
M R, Eftink, C A, Ghiron
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Fluorescence Anisotropy Controlled by Light Quenching

Photochemistry and Photobiology, 1998
We demonstrated that fluorescence anisotropy can be effectively decreased or increased in the presence of light quenching, depending on relative polarizations of excitation and quenching pulses. For parallel light quenching, anisotropy decreases to 0.103 and z-axis symmetry is preserved.
I, Gryczynski, Z, Gryczynski, J R, Lakowicz   +2 more
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Nanoparticle induced fluorescence quenching

Radiation Physics and Chemistry, 1997
Fluorescence quenching of some dyes and probe molecules residing near the surface of very small silver metal particulate has been described. The quenching effect has been shown to be surface induced which has been authenticated by the reversible formation and destruction of the particle surface.
T. Pal, N.R. Jana, T. Sau
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Magnetic quenching of fluorescence

Chemical Physics Letters, 1977
Abstract The direct and indirect mechanisms for the magnetic enhancement of radiationless decay processes are described, and used to account for the experimental observations of the magnetic quenching of fluorescence from carbon disulphide, glyoxal, and nitrogen dioxide.
P.W. Atkins, Paul.R. Stannard
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Fluorescence quenching in Nd:YAG

Applied physics, 1973
We show that quenching of the Nd fluorescence is in principle not associated with the Nd3+ ion but with the host. The process is due to near-field electric dipole interaction between Nd pairs, and cross relaxation via the4I1 5/2 manifold. We present for the first time the complete fluorescence spectrum and level scheme of Nd∶YAG, and find that Nd∶YAG ...
H. G. Danielmeyer, M. Blätte, P. Balmer
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Quenching of NO2 Fluorescence

The Journal of Chemical Physics, 1966
Quenching constants for NO2 fluorescence were obtained for 13 different inert gases. Quenching cross sections range from 1/25 to 1/2 of gas kinetic and increase with increasing molecular complexity, and dipole moment. No unusual resonance effect for quenching by ground-state NO2 was found.
G. H. Myers, D. M. Silver, F. Kaufman
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Fluorescence‐quenching‐resolved spectroscopy of proteins

European Journal of Biochemistry, 1988
A new procedure is described for using fluorescence‐quenching data of tryptophan residues in proteins to resolve their fluorescence emission spectra. In this concept the Stern‐Volmer quenching plot is determined at each particular emission wavelength and itterative non‐linear least‐squares fitting procedure allowed to resolve the steady‐state emission ...
Z, Wasylewski, H, poloczek, A, Wasniowska   +2 more
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Detection of oxygen by fluorescence quenching

Applied Optics, 1985
The incorporation of an aromatic hydrocarbon fluorescent compound into silicone allows utilization of fluorescence quenching as a mechanism to measure molecular oxygen concentration in the composite matrix. Excitation and emission spectra of the aromatics change in agreement with the Franck-Condon model when the universal solvent is benzene ...
M E, Cox, B, Dunn
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