Results 41 to 50 of about 215,411 (342)

Energy transfer from retinal to amino acids — a time-resolved study of the ultraviolet emission of bacteriorhodopsin [PDF]

open access: yes, 1986
Two-step excitation of retinal in bacteriorhodopsin by visible light is followed by an energy transfer to amino acids that is seen as fluorescent emission around 350 nm.
Franz, M. A.   +4 more
core   +1 more source

New Fluorescence Quenching Approach for Determination of Valsartan in Certain Tablets and Spiked Biological Fluids

open access: yesARO-The Scientific Journal of Koya University, 2020
A new, simple, selective, sensitive, fast, economical, and reliable fluorescence quenching method for the quantitation of valsartan was investigated using basic fuchsin act as a fluorometric dye.
Layth I. Abd Ali
doaj   +1 more source

Testing the Underlying Chemical Principles of the Biotic Ligand Model (BLM) to Marine Copper Systems: Measuring Copper Speciation Using Fluorescence Quenching [PDF]

open access: yes, 2017
Speciation of copper in marine systems strongly influences the ability of copper to cause toxicity. Natural organic matter (NOM) contains many binding sites which provides a protective effect on copper toxicity.
McGeer, James C.   +2 more
core   +2 more sources

Metal-Enhanced Fluorescence of Carbon Nanotubes

open access: yes, 2010
The photoluminescence (PL) quantum yield of single-walled carbon nanotubes (SWNTs) is relatively low, with various quenching effects by metallic species reported in the literature.
Dai, Hongjie   +5 more
core   +1 more source

The impact of the air-fluorescence yield on the reconstructed shower parameters of ultra-high energy cosmic rays [PDF]

open access: yes, 2010
An accurate knowledge of the fluorescence yield and its dependence on atmospheric properties such as pressure, temperature or humidity is essential to obtain a reliable measurement of the primary energy of cosmic rays in experiments using the ...
Arqueros, F.   +3 more
core   +3 more sources

Anthracene Fluorescence Quenching by a Tetrakis (Ketocarboxamide) Cavitand

open access: yesJournal of Spectroscopy, 2014
Quenching of both fluorescence lifetime and fluorescence intensity of anthracene was investigated in the presence of a newly derived tetrakis (ketocarboxamide) cavitand at various concentrations.
Tibor Zoltan Janosi   +5 more
doaj   +1 more source

Tryptophan Fluorescence Quenching Assays for Measuring Protein-ligand Binding Affinities: Principles and a Practical Guide

open access: yesBio-Protocol, 2019
Tryptophan fluorescence quenching is a type of fluorescence spectroscopy used for binding assays. The assay relies on the ability to quench the intrinsic fluorescence of tryptophan residues within a protein that results from changes in the local ...
Anthony Yammine, Jinlong Gao, Ann Kwan
doaj   +1 more source

Insight into the Interaction between the HIV-1 Integrase Inhibitor Elvitegravir and Bovine Serum Albumin: A Spectroscopic Study

open access: yesJournal of Spectroscopy, 2015
The interaction between the anti-HIV drug Elvitegravir (EVG) and bovine serum albumin (BSA) was investigated by fluorescence spectroscopy and UV-visible absorption spectra. The mechanism for quenching the fluorescence of BSA by EVG is discussed.
Ali Saber Abdelhameed
doaj   +1 more source

Unified evaluation of surface-enhanced resonance Raman scattering and fluorescence under strong coupling regime

open access: yes, 2018
We demonstrate importance of molecular multiple excitons and higher-order plasmons for both enhancement and quenching of resonance Raman and fluorescence of single dye molecule located at plasmonic hotspot under strong coupling regime.
Itoh, Tamitake, Yamamoto, Yuko S.
core   +1 more source

Synthesis of 5-Dialkyl(aryl)aminomethyl-8-hydroxyquinoline Dansylates as Selective Fluorescent Sensors for Fe3+

open access: yesMolecules, 2007
A series of 5-dialkyl(aryl)aminomethyl-8-hydroxyquinoline dansylates were synthesized and their fluoroionophoric properties toward representative alkali ions, alkaline earth ions and transition metal ions were investigated.
Yaowu Sha, Feng Wang, Ruogu Peng
doaj   +1 more source

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