Results 241 to 250 of about 482,938 (285)

Analysis of chemical equilibrium of silicon-substituted fluorescein and its application to develop a scaffold for red fluorescent probes.

Analytical Chemistry, 2015
Fluorescein is a representative green fluorophore that has been widely used as a scaffold of practically useful green fluorescent probes. Here, we report synthesis and characterization of a silicon-substituted fluorescein, i.e., 2-COOH TokyoMagenta (2 ...
K. Hirabayashi, K. Hanaoka, T. Takayanagi, Y. Toki, Takahiro Egawa, M. Kamiya, Toru Komatsu, Tasuku Ueno, Takuya Terai, Kengo Yoshida, M. Uchiyama, T. Nagano, Y. Urano   +12 more
semanticscholar   +1 more source

Thermally activated delayed fluorescence of fluorescein derivative for time-resolved and confocal fluorescence imaging.

Journal of the American Chemical Society, 2014
Compared with fluorescence imaging utilizing fluorophores whose lifetimes are in the order of nanoseconds, time-resolved fluorescence microscopy has more advantages in monitoring target fluorescence.
Xiaoqing Xiong, Fengling Song, Jingyun Wang, Yukang Zhang, Yingying Xue, Liangliang Sun, N. Jiang, Pan Gao, Lu Tian, Xiaojun Peng   +9 more
semanticscholar   +1 more source

Intravenous fluorescein overdose in a child undergoing fluorescein angiography

Journal of American Association for Pediatric Ophthalmology and Strabismus
Fluorescein angiography is a fluorescent dye-based imaging procedure, most commonly indicated in the pediatric setting to evaluate peripheral retinal vascular lesions. Fluorescein dye is organic, water soluble, and largely excreted renally, with a reassuring safety profile at therapeutic doses. While toxicity with intrathecal overdose has been reported,
Rhea W. Teng, Michael T.B. Nguyen, David G. Hunter, Pablo Altschwager   +3 more
openaire   +2 more sources

Ocular fluorescein phototoxicity

Applied Optics, 1987
Fluorescein angiography is one of the most commonly used diagnostic techniques in modern ophthalmology. Prior to this study, recommendations on the phototoxicity of this technique were based on light levels alone (i.e., without fluorescein present). Using a rabbit model to demonstrate retinal damage, intravenous sodium fluorescein was found to reduce ...
Bernard F. Hochheimer, Salvatore A. D'Anna, Gerard A. Lutty   +2 more
openaire   +3 more sources

The use of fluorescein diacetate and phenosafranine for determining viability of cultured plant cells.

Stain Technology, 1972
Various stains were tested with suspension cell cultures of Nicotiana tabacum (tobacco), Oryza sativa (rice), Glycine max (soybean), Daucus carota (carrot) and Lycopersicon esculentum (tomato).
J. Widholm
semanticscholar   +1 more source

Extending applicability of the oxygen radical absorbance capacity (ORAC-fluorescein) assay.

Journal of Agricultural and Food Chemistry, 2004
The ORAC-fluorescein (ORAC-FL) method recently validated using automatic liquid handling systems has now been adapted to manual handling and using a conventional fluorescence microplate reader. As calculated for Trolox, the precision of the method was
A. Dávalos, C. Gómez-Cordovés, B. Bartolomé   +2 more
semanticscholar   +1 more source

Observations on the absorption spectra of fluorescein, fluorescein derivatives and conjugates

Archives of Biochemistry and Biophysics, 1958
Abstract 1. 1. Rapid loss in the characteristic maximum at 490 mμ occurs in solutions of fluorescein (uranin) below pH 7.0 with elimination of fluorescence at pH 2.0. A new absorption band appears in these solutions below pH 5.0 with a maximum at 430 mμ at pH 2.0. 2. 2.
openaire   +2 more sources

Endoscopic Fluorescein Angiography

Ophthalmic Surgery, Lasers and Imaging Retina, 1996
* BACKGROUND AND OBJECTIVE: To assess features of various retinal and choroidal disorders by endoscopic fluorescein angiograms (EFAs) obtained intraoperatively. * PATIENTS AND METHODS: One hundred patients undergoing vitrectomy were studied intraoperatively by injecting 5 ml of 10% fluorescein intravenously.
openaire   +3 more sources

The Use of Fluorescein in Vitrectomy

Archives of Ophthalmology, 1987
To the Editor. —Fluorescein has been proposed as an aid in vitreous surgery. This agent can be injected intravenously prior to operation 1 or introduced directly into the eye. 2 Intravenous injection carries the risk of serious systemic reaction and is also of little use in unplanned procedures, since the dye has to be injected at least 18 hours ...
openaire   +3 more sources

Advances in modifying fluorescein and rhodamine fluorophores as fluorescent chemosensors.

Chemical Communications, 2013
The fluorophores based on xanthene scaffolds, mainly containing rhodamine and fluorescein dyes, have attracted considerable interest from chemists due to their excellent photophysical properties such as high absorption coefficient, high fluorescence ...
Hong Zheng, X. Zhan, Qing-Na Bian, Xiao-Juan Zhang   +3 more
semanticscholar   +1 more source