Results 1 to 10 of about 272,098 (147)

Toluidine Blue for the Determination of Binding of Anionic Polysaccharides to Lipid Raft Domains by Absorption Spectroscopy [PDF]

open access: yesMembranes
The complexes of negatively charged polysaccharides with lipid vesicles have been shown to have applications in medicine, bioremediation, water purification, and construction of nano-biosensors.
Sandra Gębczyńska   +6 more
doaj   +2 more sources

Improving the accuracy of the NDIR-based CO 2 sensor for breath analysis [PDF]

open access: yesMetrology and Measurement Systems, 2021
The paper presents an analysis and practical study of the temperature and pressure influence on a nondispersive infrared (NDIR) sensor for measuring the concentration of carbon dioxide in human breath.
Artur Prokopiuk   +2 more
doaj   +1 more source

Absorption Spectroscopy in Dental Tissue Analysis

open access: yesIEEE Access, 2023
Oral health problems are closely associated with the analysis of dental tissue changes and the stomatologic treatment that follows. This paper explores the use of diffuse reflectance spectroscopy in the detection of dental tissue disorders.
Ales Prochazka   +2 more
doaj   +1 more source

Colorimetric Phosphate Detection Using Organic DFB Laser Based Absorption Spectroscopy

open access: yesMicromachines, 2021
A novel compact laser absorption spectrometer is developed for colorimetric detection. We demonstrate the realization of the system as well as example measurements of phosphate in water samples based on the malachite green (MG) method.
Thilo Pudleiner   +3 more
doaj   +1 more source

Development of a Stable Oxygen Sensor Using a 761 nm DFB Laser and Multi-Pass Absorption Spectroscopy for Field Measurements

open access: yesSensors, 2023
An optical sensor system based on wavelength modulation spectroscopy (WMS) was developed for atmospheric oxygen (O2) detection. A distributed feedback (DFB) laser with butterfly packaging was used to target the O2 absorption line at 760.89 nm.
Jvqiang Chang, Qixin He, Mengxin Li
doaj   +1 more source

Non-Hermitian Absorption Spectroscopy

open access: yesPhysical Review Letters, 2022
30 pages including Supplemental Material, 16 ...
Kai Li, Yong Xu
openaire   +3 more sources

Soliton absorption spectroscopy [PDF]

open access: yesPhysical Review A, 2010
We analyze optical soliton propagation in the presence of weak absorption lines with much narrower linewidths as compared to the soliton spectrum width using the novel perturbation analysis technique based on an integral representation in the spectral domain.
Kalashnikov, V. L., Sorokin, E.
openaire   +3 more sources

Photonic Technology for Precision Metrology

open access: yesApplied Sciences, 2022
Precision metrology is important for understanding and monitoring various phenomena, especially in special and scientific applications. The subject of the article covers selected aspects of the study of high-resolution measurements of the absorption ...
Jacek Wojtas
doaj   +1 more source

Characterizing viral samples using machine learning for Raman and absorption spectroscopy

open access: yesMicrobiologyOpen, 2022
Machine learning methods can be used as robust techniques to provide invaluable information for analyzing biological samples in pharmaceutical industries, such as predicting the concentration of viral particles of interest in biological samples. Here, we
Miad Boodaghidizaji   +5 more
doaj   +1 more source

A Method for Correcting the Interference of Overlapping Absorption Lines Using Second Harmonic Spectral Reconstruction

open access: yesApplied Sciences, 2021
The measurement accuracy of trace gas detection based on infrared absorption spectroscopy is influenced by the overlap of absorption lines. A method for correcting the interference of overlapping absorption lines using second harmonic spectral ...
Yue Hou, Kejin Huang
doaj   +1 more source

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