Results 221 to 230 of about 21,643 (260)

Diffuse Reflection Spectroscopy: An Alternative to Autofluorescence Spectroscopy in Tongue Cancer Detection

Applied Spectroscopy, 2010
Laser-induced autofluorescence (LIAF) and diffuse reflection spectroscopy (DRS) are two emerging noninvasive optical tools that have shown immense potential to detect oral cavity pre-cancer. In a recent study, we have used spectral ratio reference standards (SRRS) of LIAF intensity ratios F500/F635, F500/F685, and F500/F705 for grading of tissues ...
Rupananda Jayachandra, Mallia, Subhash, Narayanan, Jayaprakash, Madhavan, Paul, Sebastian, Rejnish, Kumar, Anitha, Mathews, Gigi, Thomas, Jayakrishnan, Radhakrishnan   +7 more
openaire   +2 more sources

Extraction of diffuse reflection spectrum on reflectance spectroscopy for solid or powder surfaces

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2000
Reflectance spectroscopy usually produces distorted spectra because it is arbitrarily composed of two different types of reflectance, specular reflectance and diffuse reflectance. That is why this has been an annoying problem for reflectance spectroscopists.
M, Kaihara, Y, Sato
openaire   +2 more sources

Diffuse reflectance spectroscopy—Important developments

Mikrochimica Acta, 1988
Effect of front surface reflectance is incorporated into standard Kubelka-Munk theory of diffuse reflection. A method of obtaining the absorption coefficient independent of scattering coefficient is presented.
openaire   +1 more source

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
openaire   +2 more sources

Diffuse reflectance spectroscopy for the measurement of tissue oxygen saturation

Physiological Measurement, 2015
Tissue oxygen saturation (StO2) is a useful parameter for medical applications. A spectroscopic method has been developed to detect pathologic tissues, due to a lack of normal blood circulation, by measuring StO2. In this study, human blood samples with different levels of oxygen saturation have been prepared and spectra were acquired using an optical ...
Sircan-Kucuksayan, A., Uyuklu, MEHMET, CANPOLAT, MURAT   +2 more
openaire   +3 more sources

Diffuse Reflectance Spectroscopy

C R C Critical Reviews in Analytical Chemistry, 1971
Roland W. Frei, Harry Zeitlin
openaire   +1 more source

Does the Spectral Format Matter in Diffuse Reflection Spectroscopy?

Applied Spectroscopy, 2009
Near-infrared, and more recently, mid-infrared diffuse reflection spectroscopy (more commonly and erroneously called reflectance spectroscopy) have come to be extensively used to determine the composition of products ranging from forages and drugs to soils. In these methods, spectra are generally collected as reflectance or R and transformed to log (1/
openaire   +2 more sources

Theory and Applications of Diffuse Reflectance Spectroscopy

1965
At present there are at least 100 papers in the literature in which the diffuse reflectance method is used without question to obtain approximate absorption spectra of solids in the visible and near UV, or in which attempts are made to overcome the recognized limitations of the method, namely, that diffuse reflectance spectra are not always identical ...
openaire   +1 more source

Elastic- Scattering Spectroscopy and Diffuse Reflectance

2003
Judith R. Mourant, Irving J. Bigio
openaire   +1 more source

Second Derivative Diffuse Reflectance Spectroscopy for Estimating Tissue Hypoxia

OSA Continuum, 2021
Wesam Bachir
exaly