نتایج جستجو برای: optode

تعداد نتایج: 246  

Journal: :Analysis & sensing 2023

The cover feature image shows a two-dimensional (2D) colorimetric carbon dioxide (CO2) sensor composed of gas-permeable polypropylene film (25 μm thick) and signal transduction hydrogel layer (30 thick). contained pH sensitive chromoionophore to indicate the CO2 induced change, cationic amine further capture through carbamate formation reaction. With this 2D optode, release from yeast-catalyzed...

Journal: :Analytical chemistry 2002
Martin Telting-Diaz Eric Bakker

The development and characterization of small, uniform, and mass-produced plasticized PVC-based sensing microspheres in view of rapid trace level analysis of lead ions is reported. Micrometer-sized particles obtained via an automated casting process were rendered selective for lead ions by doping them with highly selective components in a manner analogous to traditional optode sensing films. Si...

2016
Hoang-Dung Nguyen Keum-Shik Hong Yong-Il Shin

In this paper, a theory for detection of the absolute concentrations of oxy-hemoglobin (HbO) and deoxy-hemoglobin (HbR) from hemodynamic responses using a bundled-optode configuration in functional near-infrared spectroscopy (fNIRS) is proposed. The proposed method is then applied to the identification of two fingers (i.e., little and thumb) during their flexion and extension. This experiment i...

Journal: :Chemical communications 2014
Thomas Schwarze Holger Müller Sandra Ast Dörte Steinbrück Sascha Eidner Felix Geissler Michael U Kumke Hans-Jürgen Holdt

We report a 1,2,3-triazol fluoroionophore for detecting Na(+) that shows in vitro enhancement in the Na(+)-induced fluorescence intensity and decay time. The Na(+)-selective molecule 1 was incorporated into a hydrogel as a part of a fiber optical sensor. This sensor allows the direct determination of Na(+) in the range of 1-10 mM by measuring reversible fluorescence decay time changes.

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