Results 211 to 220 of about 19,017 (243)

Diffuse reflectance spectroscopy of powders

Vibrational Spectroscopy, 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
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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
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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
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Non-contact Quantitative Diffuse Reflectance Spectroscopy

Diffuse Optical Imaging V, 2015
We validate a non-contact Diffuse Reflectance Spectroscopy (DRS) system as a first stage to approach quantitative multi-spectral imaging technique. The non-contact DRS system with separated illumination and detection paths was developed with different progressive set-ups which were all compared to a well-founded contact DRS system.
Veronica Sorgato, Michel Berger, Charlotte Emain, Anne Koenig, Blandine Roig, Christine Vever-Bizet, Jean-Marc Dinten, Geneviève Bourg-Heckly, Anne Planat-Chrétien   +8 more
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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).
James B, Reeves, Barry A, Francis, Stephen K, Hamilton   +2 more
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Diffuse reflectance spectroscopy of fibrous proteins

Amino Acids, 2012
UV-visible diffuse reflectance (DR) spectra of the fibrous proteins wool and feather keratin, silk fibroin and bovine skin collagen are presented. Natural wool contains much higher levels of visible chromophores across the whole visible range (700-400 nm) than the other proteins and only those above 450 nm are effectively removed by bleaching.
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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
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Diffuse reflectance spectroscopy of liver tissue

SPIE Proceedings, 2015
Diffuse reflectance spectroscopy (DRS) with a fiber-optic contact probe is a cost-effective, rapid, and non-invasive optical method used to extract diagnosis information of tissue. By combining commercially available VIS- and NIR-spectrometers with various fiber-optic contact-probes, we have access to the full wavelength range from around 400 to 1600 ...
Nina Reistad, Jan Nilsson, Oskar Vilhelmsson Timmermand, Christian Sturesson, Stefan Andersson-Engels   +4 more
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Diffuse reflectance Fourier transform IR spectroscopy

TrAC Trends in Analytical Chemistry, 1988
Abstract Fourier transform infrared (FTIR) spectroscopy has greatly enhanced the utility and range of applications of infrared (IR) spectroscopy in chemistry. Until the development of routine FTIR instrumentation, applications of IR were essentially limited to direct transmission measurements.
D.E. Leyden, R.S.S. Murthy
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Iron-Adjuvant Interactions Observed with Diffuse Reflectance Spectroscopy

Journal of Pharmaceutical Sciences, 1968
Numerous adjuvants have been screened for the existence of chemical and physical interactions with iron compounds. Results indicate that calcium hydroxide, magnesium hydroxide, magnesium oxide, magnesium carbonate, magnesium citrate, zinc oxide, and potassium iodide do undergo large spectral and visual color changes on equilibration with ferrous ...
M, Bornstein, J L, Lach, B J, Munden
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