Results 21 to 30 of about 121,227 (315)

Laser-fluorescence assessment of sodium hypochlorite quenching reversal agents on human dentine

open access: yes, 2022
Background: Laser-fluorescence diagnostic technology for real-time clinical assessment of residual bacteria could help assist in determining the endpoints for root canal debridement. Sodium hypochlorite (NaOCl) can however quench fluorescence and lead to
George, Roy   +3 more
core   +1 more source

A Simple Determination of Trinitrotoluene (TNT) Based on Fluorescence Quenching of Rhodamine 110 with FRET Mechanism

open access: yes, 2021
© 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.Sensitive and selective detection of nitroaromatic explosives is an important issue in regard to human health, environment, public security ...
APAK, Mustafa Reşat   +2 more
core   +1 more source

Fluorescence of Alexa fluor dye tracks protein folding. [PDF]

open access: yesPLoS ONE, 2012
Fluorescence spectroscopy is an important tool for the characterization of protein folding. Often, a protein is labeled with appropriate fluorescent donor and acceptor probes and folding-induced changes in Förster Resonance Energy Transfer (FRET) are ...
Simon Lindhoud   +4 more
doaj   +1 more source

Structure of the Cytoplasmic Loop between Putative Helices II and III of the Mannitol Permease of Escherichia coli: A Tryptophan and 5-Fluorotryptophan Spectroscopy Study [PDF]

open access: yes, 2008
In this work, four single tryptophan (Trp) mutants of the dimeric mannitol transporter of Escherichia coli, EIImtl, are characterized using Trp and 5-fluoroTrp (5-FTrp) fluorescence spectroscopy.
Bokhove, Marcel,   +11 more
core   +1 more source

Quenching of the fluorescence of NO2 [PDF]

open access: yesJournal of Photochemistry, 1972
The fluorescence yield of NO2 was monitored at 25 C with incident wavelengths of 4047, 4358, and 4800A at fluorescence wavelengths of 4860, 5577, and 6300A. The NO2 pressure was varied between 0.004 and 0.080 torr. Measurements were taken both in the absence of foreign gases and in the presence of up to 30 torr. He, N2, and O2 at each NO2 pressure.
Silvia Braslavsky, Julian Heicklen
openaire   +1 more source

Fullerenol Quantum Dots-Based Highly Sensitive Fluorescence Aptasensor for Patulin in Apple Juice

open access: yesToxins, 2022
A highly selective and sensitive aptasensor for detecting patulin (PAT) was constructed based on the fluorescence quenching of fullerenol quantum dots (FOQDs) towards carboxytetramethylrhodamine (TAMRA) through PET mechanism. The π-π stacking interaction
Hua Pang   +9 more
doaj   +1 more source

Reaction Mechanism Spectroscopy Studies of Protein and Orange II

open access: yesChemical Engineering Transactions, 2015
In this paper, the interaction of Orange II and Human Serum Albumin was studied by fluorescence spectroscopy under simulated physiological conditions. The affection of pigment and serum albumin may cause changes in the microenvironment.
L. Fu   +4 more
doaj   +1 more source

Excitation Energy Transfer and Trapping in Higher Plant Photosystem II Complexes with Different Antenna Sizes [PDF]

open access: yes, 2011
700 cm(-1)) and a slow relaxation of the radical pair to an irreversible state (similar to 150 ps). Somewhat unexpectedly, we had to reduce the energy-transfer and charge-separation rates in complexes with decreasing size to obtain optimal fits.
van Amerongen, H.   +14 more
core   +1 more source

Spectrofluorimetric Determination of Nepafenac Through Quenching Lanthanide Luminescence in Drug Substance and in Ophthalmic Suspension [PDF]

open access: yesJournal of Advanced Pharmacy Research, 2020
Objective: A simple, selective and sensitive spectrofluorometric method is established for the quantitative assay of Nepafenac (NEPA) in pure form and in ophthalmic suspension dosage form.
Mohamed Rizk   +4 more
doaj   +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

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