Results 311 to 320 of about 3,713,947 (387)

Capsulation of AuNCs with AIE Effect into Metal-Organic Framework for the Marriage of a Fluorescence and Colorimetric Biosensor to Detect Organophosphorus Pesticides.

Analytical Chemistry, 2021
Organophosphorus pesticides (OPs) can inhibit the activity of acetylcholinesterase (AChE) to induce neurological diseases. It is significant to exploit a rapid and sensitive strategy to monitor OPs.
Yuepeng Cai, Hongshuai Zhu, Weichi Zhou, Ziyin Qiu, Congcong Chen, Aori Qileng, Kangshun Li, Yingju Liu   +7 more
semanticscholar   +1 more source

Advanced Fluorescence Imaging Technology in the Near-Infrared-II Window for Biomedical Applications.

Journal of the American Chemical Society, 2020
Fluorescence imaging has become a fundamental tool for biomedical applications; nevertheless, its intravital imaging capacity in the conventional wavelength range (400-950 nm) has been restricted by the extremely limited tissue penetration.
Chunyan Li, Guangcun Chen, Yejun Zhang, Feng Wu, Qiangbin Wang   +4 more
semanticscholar   +1 more source

A Fluorescence and Fluorescence Probe Study of Benzonaphthyridines

Journal of Fluorescence, 2011
A series of benzo[b][1,8]naphthyridines has been synthesized by Friedländer condensation of 2-aminoquinoline-3-carbaldehyde 1 (o-aminoaldehyde) with alicyclic ketones in basic medium. Benzonaphthyridines branched with various side-chains and substituents are prepared with the aim of being investigated as a good fluorescent material.
Deepak Prakash, Shelar, Sandeep R, Patil, Ramhari V, Rote, Madhukar N, Jachak   +3 more
openaire   +2 more sources

Fluorescence Microscopy

Current Protocols in Immunology, 1998
AbstractAbsorption of energy as light by some molecules and emission of energy as fluorescence can occur only at certain wavelengths, which are characteristic for a given molecule (fluorophore). Fluorescence microscopes are equipped to observe the fluorescence of one or more specific fluorophores to localize specific molecules and analyzed cellular ...
openaire   +3 more sources

Carbon dots: synthesis, formation mechanism, fluorescence origin and sensing applications

Green Chemistry, 2019
We systematically summarize the recent progress in the green synthesis and formation mechanism of CDs with the hope to provide guidance for developing CDs with the concept of green chemistry.
M. Liu, B. Chen, C. Li, C. Huang
semanticscholar   +1 more source

Fluorescence and autofluorescence

Best Practice & Research Clinical Gastroenterology, 1999
Fluorescence detection is one of a series of new spectroscopic techniques currently developed for implementation in endoscopy. This technology is likely to significantly enhance our ability to detect minute lesions and to predict the histology of certain macroscopic lesions.
Haringsma, J., Tytgat, G. N.
openaire   +2 more sources

Fundamentals of Fluorescence and Fluorescence Microscopy

2003
This chapter discusses the fundamental physics of fluorescence. The application of fluorescence to microscopy represents an important transition in the development of microscopy, particularly as it applies to biology. It enables quantitating the amounts of specific molecules within a cell, determining whether molecules are complexing on a molecular ...
openaire   +4 more sources

Fluorescent bronchoscopy

Thoracic Surgery Clinics, 2004
Detection of clinically occult lung neoplasms may represent an opportunity for early curative intervention. Fluorescent bronchoscopy is a sensitive technique for detecting early endobronchial tumors that may be combined with CT scanning as part of a comprehensive lung cancer screening program.
Sebastien, Gilbert, James D, Luketich, Neil A, Christie   +2 more
openaire   +2 more sources

Fluorescence spectroscopy of tissue: recovery of intrinsic fluorescence from measured fluorescence

Applied Optics, 1996
We present a method for recovering the intrinsic fluorescence coefficient, defined as the product of the fluorophore absorption coefficient and the fluorescence energy yield, of an optically thick, homogeneous, turbid medium from a surface measurement of fluorescence and from knowledge of medium optical properties.
C M, Gardner, S L, Jacques, A J, Welch
openaire   +2 more sources

FLUORESCENCE AND FLUORESCENCE CONVERSION

1965
Abstract : The quenching constant for the iodide quenching of the fluorescence of riboflavin phosphate was measured at pH 5 and at pH 8. The value of this constant (K1) at the lower pH (where the phosphate group is unionized), was independent of the ionic strength, mu.
openaire   +1 more source