Closed-form expressions for obtaining the absorption and scattering coefficients of a turbid medium with time-resolved spectroscopy

1997 ◽  
Vol 36 (31) ◽  
pp. 8298 ◽  
Author(s):  
S. J. Matcher
Keyword(s):  
Closed Form ◽  
Turbid Medium ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Scattering Coefficients

scholarly journals MADSTRESS: A Linear Approach for Evaluating Scattering and Absorption Coefficients of Samples Measured Using Time-Resolved Spectroscopy in Reflection

2005 ◽  
Vol 59 (10) ◽  
pp. 1229-1235 ◽  
Author(s):  
F. Chauchard ◽  
J. M. Roger ◽  
V. Bellon-Maurel ◽  
C. Abrahamsson ◽  
S. Andersson-Engels ◽  
...  
Keyword(s):  
Near Infrared ◽  
Sugar Content ◽  
Optimization Techniques ◽  
Evaluation Procedure ◽  
Calibration Model ◽  
Chemical Absorption ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Scattering Coefficients ◽  
Interpolation Procedure

Time-resolved spectroscopy is a powerful technique permitting the separation of the scattering properties from the chemical absorption properties of a sample. The reduced scattering coefficient and the absorption coefficient are usually obtained by fitting diffusion or Monte Carlo models to the measured data using numerical optimization techniques. However, these methods do not take the spectral dimension of the data into account during the evaluation procedure, but evaluate each wavelength separately. A procedure involving multivariate methods may seem more appealing for people used to handling conventional near-infrared data. In this study we present a new method for processing TRS spectra in order to compute the absorption and reduced scattering coefficients. This approach, MADSTRESS, is based on linear regression and a two-dimensional (2D) interpolation procedure. The method has allowed us to calculate absorption and scattering coefficients of apples and fructose powder. The accuracy of the method was good enough to provide the identification of fructose absorption peaks in apple absorption spectra and the construction of a calibration model predicting the sugar content of apples.

scholarly journals Photophysical properties and fluorosolvatochromism of D–π–A thiophene based derivatives

RSC Advances ◽  
2020 ◽  
Vol 10 (71) ◽  
pp. 43459-43471
Author(s):  
Hussain A. Z. Sabek ◽  
Ahmed M. M. Alazaly ◽  
Dina Salah ◽  
Hesham S. Abdel-Samad ◽  
Mohamed A. Ismail ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Fluorescence Emission ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Solvation Models

Solvation-dependent photophysical properties of two push–pull thiophene-based compounds with donor–π–acceptor (D–π–A) structures were investigated using absorption, fluorescence emission and time resolved spectroscopy, and supported by different solvation models.

Time-resolved spectroscopy of single excitons bound to Te isoelectronic pairs in ZnSe

2005 ◽  
Author(s):  
A. Muller ◽  
P. Bianucci ◽  
C.K. Shih ◽  
I.C. Robin ◽  
R. Andre ◽  
...  
Keyword(s):  
Time Resolved ◽  
Time Resolved Spectroscopy

Excited States of C70and the Intersystem Crossing Process Studied by Picosecond Time-Resolved Spectroscopy in the Visible and Near-IR Region

1996 ◽  
Vol 100 (25) ◽  
pp. 10518-10522 ◽  
Author(s):  
Akira Watanabe ◽  
Osamu Ito ◽  
Motoyuki Watanabe ◽  
Haruhisa Saito ◽  
Musubu Koishi
Keyword(s):  
Excited States ◽  
Intersystem Crossing ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Near Ir
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