Results 11 to 20 of about 98,893 (266)

Quenching Efficiency of Quantum Dots Conjugated to Lipid Bilayers on Graphene Oxide Evaluated by Fluorescence Single Particle Tracking

Applied Sciences, 2022
A single particle observation of quantum dots (QDs) was performed on lipid bilayers formed on graphene oxide (GO). The long-range fluorescence quenching of GO has been applied to biosensing for various biomolecules.
Yoshiaki Okamoto, Seiji Iwasa, Ryugo Tero   +2 more
doaj   +1 more source

Fluorescence Detection Characteristic of Heavy-metal Chromium Ions in Water by Photoluminescent Tungsten-oxide Cluster Material

Shipin gongye ke-ji, 2022
In this work, using Eu3+ embedded tungsten-oxygen cluster (compound 1) as the fluorescent probe material, the rapid and sensitive fluorescence detection of heavy metal Cr3+ ions in aqueous solution by compound 1 has been systematically studied.
Zhenwei WANG, Xiliang CHEN, Xiaobing HU, Changyuan LU   +3 more
doaj   +1 more source

Determination of epristeride by its quenching effect on the fluorescence of L-tryptophan

Journal of Pharmaceutical Analysis, 2013
A rapid, novel spectrofluorimetric method to determine epristeride (EP) in biological fluids and a pharmaceutical formulation was developed, based on the fact that fluorescence intensity of l-tryptophan could be quenched by EP in the medium of pH=9.0 ...
Ai-Qin Gong, Xia-Shi Zhu
doaj   +1 more source

Promoting near‐infrared II fluorescence efficiency by blocking long‐range energy migration

Aggregate, 2023
Generally, long wavelength absorbed near‐infrared II (NIR‐II) dyes have a low fluorescence efficiency in aggregate states for aggregate‐caused quenching effect, simultaneously enhancing efficiency and extending absorption is a challenging issue for NIR ...
Changjin Ou, Lei An, Ziqi Zhao, Fan Gao, Liangyu Zheng, Chao Xu, Kang Zhang, Jinjun Shao, Linghai Xie, Xiaochen Dong   +9 more
doaj   +1 more source

INVESTIGAÇÃO DA SUPRESSÃO DE FLUORESCÊNCIA DE SORO ALBUMINA BOVINA E HUMANA POR COMPLEXO DE RUTÊNIO

Química Nova, 2015
The binding of [RuCl2(L)] (L = N,N-bis(7-methyl-2-pyridylmethylene)-1,3-diiminopropane) to bovine and human serum albumin was investigated by the fluorescence quenching technique.
Mariete B. Moreira, Douglas S. Franciscato, Kalil C. F. Toledo, João Raul B. de Souza, Helena S. Nakatani, Vagner R. de Souza   +5 more
doaj   +1 more source

Binding of caffeine with nicotinamide: A study by means of fluorescence quenching and UV-Vis spectroscopic techniques

St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2023
In this work, the binding of caffeine (CAF) with nicotinamide (NIC) has been investigated by means of fluorescence quenching and UV-Vis spectroscopic techniques.
Gebreyohanes Ataklti Abraha, Gemta Abebe Belay   +1 more
doaj   +1 more source

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

PLoS 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, Adrie H Westphal, Antonie J W G Visser, Jan Willem Borst, Carlo P M van Mierlo   +4 more
doaj   +1 more source

Reaction Mechanism Spectroscopy Studies of Protein and Orange II

Chemical 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, X.H. Hu, S.H. Zhou, S.N. Chu, H. Ding   +4 more
doaj   +1 more source

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

Toxins, 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, Hui Li, Wen Zhang, Jin Mao, Liangxiao Zhang, Zhaowei Zhang, Qi Zhang, Du Wang, Jun Jiang, Peiwu Li   +9 more
doaj   +1 more source

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

Journal 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, Ali Attia, Emad Hussien, Fatma Aboul-Alamain, Mona Elshahed   +4 more
doaj   +1 more source