Results 291 to 300 of about 215,411 (342)

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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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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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 by Redox Molecular Pumping

Journal of the American Chemical Society, 2022
Artificial molecular pumps (AMPs), inspired by the active cellular transport exhibited in biological systems, enable cargoes to undergo unidirectional motion, courtesy of molecular ratchet mechanisms in the presence of energy sources. Significant progress has been achieved, using alternatively radical interactions and Coulombic repulsive forces to ...
Li, Xuesong, David, Arthur H. G., Zhang, Long, Song, Bo, Jiao, Yang, Sluysmans, Damien, Qiu, Yunyan, Wu, Yong, Zhao, Xingang, Feng, Yuanning, Mosca, Lorenzo, Stoddart, J. Fraser   +11 more
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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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Fluorescence quenching immunoassay of serum cortisol

Steroids, 1980
Fluorescence quenching immunoassay of serum cortisol was established. The minimal amount of cortisol detected was 3.1 ng/tube and serum concentration of 3.1 micrograms/dl to 100 micrograms/dl of cortisol could be measured. Intra- and inter-assay coefficient of variation were 7.7-10.5% and 10.7-13.3%, respectively.
Y, Kobayashi, N, Tsubota, K, Miyai, F, Watanabe   +3 more
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The quenching of anthracene fluorescence

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1951
Abstract The quenching of the fluorescence of anthracene excited by light of wave-length 3650 Å by oxygen, sulphur dioxide, and by carbon tetrabromide, has been investigated both in the gaseous state and in paraffin solutions of viscosities from 0·003 to 1·9 poises. In the gaseous state quenching occurs on nearly every collision.
Edmund John Bowen, W. S. Metcalf
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Quenching of Fluorescence

1983
Fluorescence quenching refers to any process which decreases the fluorescence intensity of a given substance. A variety of processes can result in quenching. These include excited state reactions, energy transfer, complex formation, and collisional quenching.
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Diffusional Fluorescence Quenching of Aromatic Hydrocarbons

Applied Spectroscopy, 2003
The quenching of the fluorescence of five aromatic hydrocarbons by three halogenated organics and by molecular oxygen has been measured. Both fluorescence intensity and fluorescence lifetime measurements have been employed to validate results and interpretation; linear Stern–Volmer analyses are shown to apply throughout.
Clelia, Canuel, Sophie, Badre, Henning, Groenzin, Markus, Berheide, Oliver C, Mullins   +4 more
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Determination of carbazochrome by fluorescence quenching method

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2012
A sensitive, simple and selective spectrofluorimetric method for the reaction of carbazochrome (CBZC) and Eosin Y (EY) or Phloxine B (PB) in acidic medium is developed for the determination of carbazochrome in biological fluids, which gives a highly fluorescent derivative measured at 545 and 565 nm at excitation wavelengths of 301 and 305 nm.
Xiaojuan, Gan, Shaopu, Liu, Zhongfang, Liu, Xiaoli, Hu, Zhiping, Cui, Yaqiong, Wang   +5 more
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