Results 251 to 260 of about 31,293 (301)

Diffuse Reflectance Spectroscopy of Human Skin Lesions

Diagnostic Optical Spectroscopy in Biomedicine III, 2005
We have applied VIS-NIR diffuse reflectance spectroscopy to study different human skin lesions. A new set of features has been derived through the analysis of their spectra to discriminate among normal skin and skin lesions. © 2005 SPIE-OSA.
Cordo, M., Sendra, J. R., Viera, Agustín, López Silva, S. M.   +3 more
openaire   +3 more sources

Autofluorescence and diffuse reflectance spectroscopy for oral oncology

Lasers in Surgery and Medicine, 2005
AbstractBackground and ObjectivesAutofluorescence and diffuse reflectance spectroscopy have been used separately and combined for tissue diagnostics. Previously, we assessed the value of autofluorescence spectroscopy for the classification of oral (pre‐)malignancies.
de Veld, Diana C. G., Skurichina, Marina, Witjes, Max J. H., Duin, Robert P. W., Sterenborg, Henricus J. C. M., Roodenburg, Jan L. N.   +5 more
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Principles and Techniques of Diffuse-Reflectance Spectroscopy

Angewandte Chemie International Edition in English, 1963
AbstractThe prerequisites for applicability of the Kubelka‐Munk theory of diffuse reflectance for obtaining characteristic color curves of powders are discussed, and some experimental support for the theory is given. Methods are described for eliminating surface reflection, which is always superimposed upon the diffuse reflection and which therefore ...
G. Kortüm, W. Braun, G. Herzog
exaly   +2 more sources

Determination of furosemide in pharmaceutical formulations by diffuse reflectance spectroscopy

Talanta, 2004
In this report an analytical method to determine furosemide by using diffuse reflectance spectroscopy is presented. This study shows that this technique can give quantitative results using spot test analysis, particularly in the case of pharmaceuticals containing furosemide.
Leonardo Pezza
exaly   +4 more sources

Diffuse-reflectance spectroscopy in the infrared

Talanta, 1982
The theory, and the problems encountered in the development of diffuse-reflectance spectroscopy in the infrared region as an analytical technique, are reviewed. The introduction of Fourier-transform infrared spectrometers has eliminated the difficulty of detecting small scattered intensities, and diffuse-reflectance measurement is now a routine method.
H, Maulhardt, D, Kunath
openaire   +2 more sources

Specular Reflection and Diffuse Reflectance Spectroscopy of Soils

Applied Spectroscopy, 2005
Studies on the occurrence and effects of specular reflection in mid-infrared spectra of soils have shown that distortions due to specular reflection occur for both organic (humic acid) and non-organic fractions (carbonates, silica, ashed fraction of soil). The results explain why the spectra of CaCO 3
James B, Reeves, Barry A, Francis, Stephen K, Hamilton   +2 more
openaire   +2 more sources

Diffuse reflectance spectroscopy of powders

Analytica Chimica Acta, 1990
Abstract Diffuse reflectance (DRIFT) spectra in the mid-IR region, especially of inorganic powders, often reveal inverted or derivative-like structures (“reststrahlen” bands) which make their straightforward interpretation in terms of the Kubelka-Munk theory difficult.
T. Eickhoff, P. Grosse, W. Theiss
openaire   +2 more sources

Principles of Diffuse Reflectance Spectroscopy

2021
This chapter discusses absorption spectroscopy as it might relate to near-infrared (NIR) spectroscopy. This is a rigorous treatment of the two-flux approach to modeling diffuse scatter as it applies to absorption spectroscopy. It covers the topics that NIR spectroscopists have been exposed to as theory over the last few decades but is really just ...
Kevin D. Dahm, Donald J. Dahm
openaire   +1 more source

Diffuse reflectance patterns in cervical spectroscopy

Gynecologic Oncology, 2005
Our laboratory seeks to develop minimally invasive cost-effective methods to improve screening and detection of curable precursors to cervical cancer. Previously, we have presented pilot studies that assess the diagnostic power of auto-fluorescence and diffuse reflectance spectroscopy.
Nena M, Marín, Andrea, Milbourne, Helen, Rhodes, Thomas, Ehlen, Dianne, Miller, Lou, Benedet, Rebecca, Richards-Kortum, Michele, Follen   +7 more
openaire   +2 more sources

Diffuse Reflectance Infrared Spectroscopy

Journal of Chemical Education, 1994
Diffuse reflectance offers a quick and easy-to-use alternative to the preparation of KBr pellets and Nujol mulls for the infrared spectra of solid samples; includes a comparison of spectra from both techniques.
Kenneth W. Raymond, Jeffrey A. Corkill
openaire   +1 more source