Results 291 to 300 of about 1,139,926 (347)

Low dose detection of γ radiation via solvent assisted fluorescence quenching.

Journal of the American Chemical Society, 2014
Development of low cost, easy-to-use chemical sensor systems for low dose detection of γ radiation remains highly desired for medical radiation therapy and nuclear security monitoring.
Jimin Han, Miao Xu, Brian Wang, Na Wu, Xiaomei Yang, Haori Yang, B. Salter, Ling Zang   +7 more
semanticscholar   +1 more source

[10] Solute quenching of protein fluorescence

1978
Publisher Summary This chapter considers various ways of presenting and interpreting data using model calculations based on the modified Stern–Volmer equation. It provides detail information about the experimental methods for the purpose of obtaining meaningful quenching data. A quencher molecule can deactivate an excited fluorophor at the instant of
Paul C. Leavis, Sherwin S. Lehrer
openaire   +3 more sources

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.
Tapan K. Sau, Nikhil R. Jana, Tarasankar Pal   +2 more
openaire   +2 more sources

Solute perturbation of protein fluorescence. The quenching of the tryptophyl fluorescence of model compounds and of lysozyme by iodide ion.

Biochemistry, 1971
The effect of iodide on the tryptophyl fluorescence of model compounds and of lysozyme was studied in order to evaluate the factors that determine the use of iodide as a selective quencher of the fluorescence of tryptophyl side chains of proteins exposed
S. Lehrer
semanticscholar   +1 more source

Charge Transfer and Fluorescence Quenching

The Journal of Chemical Physics, 1960
A charge-transfer-interaction mechanism has been proposed for the quenching of fluorescence of a number of polynuclear aromatic hydrocarbons by aromatic solvents, especially methylated benzenes. The quenching efficiency has been found to be in the order benzene<toluene<xylene<mesitylene, which is also the order in which ionization ...
Sadhan Basu, Dilip Kuman Majumdar
openaire   +2 more sources

FLUORESCENCE QUENCHING OF INDOLE BY DIMETHYLFORMAMIDE

Photochemistry and Photobiology, 1984
Abstract— The effect of dimethylformamide on the lifetime (T) and quantum yield (F) of indole has been determined. Negative Stern‐Volmer deviations prevail for T and F, but F0/F T0/T at all DMF concentrations. The deviation between F0/F and T0/T is ascribed to changes in F0 and T0 induced by the change in solvent composition at the higher quencher ...
Mary K. Campbell, Anthony F. Fucaloro, Leslie S. Forster   +2 more
openaire   +2 more sources

Fluorescence quenching of carbon nitride nanosheet through its interaction with DNA for versatile fluorescence sensing.

Analytical Chemistry, 2013
This work investigates the interaction of carbon nitride nanosheet (CNNS), a recently developed two-dimensional nanomaterial, with DNA and its fluorescence quenching mechanism on fluorophore labeled single-stranded DNA probes.
Quanbo Wang, Wei Wang, Jianping Lei, Nan Xu, Fenglei Gao, H. Ju   +5 more
semanticscholar   +1 more source

Distance and wavelength dependent quenching of molecular fluorescence by Au@SiO2 core-shell nanoparticles.

ACS Nano, 2013
Gold nanoparticles and nearby fluorophores interact via electromagnetic coupling upon light excitation. We determine the distance and wavelength dependence of this coupling theoretically and experimentally via steady-state and time-resolved fluorescence ...
P. Reineck, D. Gómez, S. Ng, M. Karg, T. Bell, P. Mulvaney, U. Bach   +6 more
semanticscholar   +1 more source

Chlorophyll Fluorescence and Photosynthesis: The Basics

, 1991
BIOPHYSICAL BASIS O F FLUORESCENCE EMISSION FROM CHLOROPLASTS . . . . .. . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .
G. Krause, E. Weis
semanticscholar   +1 more source

QUENCHING OF METHYLCYCLOHEXANE FLUORESCENCE BY METHANOL*

Photochemistry and Photobiology, 1995
Abstract—We measured the fluorescence emission spectrum and intensity decays of methylcyclohexane (MCH) when excited by simultaneous absorption of two photons at 298 nm. The steady‐state intensities and lifetimes were both decreased by methanol, which was found to be an efficient quencher of MCH fluorescence.
Joseph R. Lakowicz, Ignacy Gryczynski
openaire   +2 more sources