Results 31 to 40 of about 111,378 (284)

MANGANESE(II) DETERMINATION BY DIFFUSE REFLECTANCE SPECTROSCOPY

open access: yesТонкие химические технологии, 2017
Results of testing a prototype light-emitting diod miniphotometer for rapid and sensitive elements determination both in laboratory and in field conditions are presented. The new photometer consists of two devices providing measurements of absorbance and
Ya. I. Simakina   +3 more
doaj   +1 more source

Hyperspectral Reflectance Characteristics of Rice Canopies under Changes in Diffuse Radiation Fraction

open access: yesRemote Sensing, 2022
To analyze the hyperspectral reflectance characteristics of rice canopies under changes in diffuse radiation fraction, experiments using different cover materials were performed in Nanjing, China, during 2016 and 2017.
Tao Zhang   +5 more
doaj   +1 more source

Instrument independent diffuse reflectance spectroscopy [PDF]

open access: yesJournal of Biomedical Optics, 2011
Diffuse reflectance spectroscopy with a fiber optic probe is a powerful tool for quantitative tissue characterization and disease diagnosis. Significant systematic errors can arise in the measured reflectance spectra and thus in the derived tissue physiological and morphological parameters due to real-time instrument fluctuations.
Yu, Bing   +2 more
openaire   +2 more sources

Optical Nerve Detection by Diffuse Reflectance Spectroscopy for Feedback Controlled Oral and Maxillofacial Laser Surgery

open access: yesJournal of Translational Medicine, 2011
Background Laser surgery lacks haptic feedback, which is accompanied by the risk of iatrogenic nerve damage. It was the aim of this study to investigate diffuse reflectance spectroscopy for tissue differentiation as the base of a feedback control system ...
Douplik Alexandre   +6 more
doaj   +1 more source

Diffuse reflectance measurement tool for laparoscopic surgery [PDF]

open access: yes, 2010
Continuous-wave diffuse reflectance or Near Infrared Spectroscopy (NIRS) offers the possibility to perform a preliminary screening of tissue for ischemia or other tissue anomalies.
Di Falco, Andrea   +3 more
core   +1 more source

Refraction and Reflection of Diffusion Fronts [PDF]

open access: yesPhysical Review Letters, 2003
Diffusion waves form the basis of several measurement technologies in materials science as well as in biological systems. They are, however, so heavily damped that their observation is a real challenge to the experimentalist. We show that accurate information about the refraction-like and reflection-like behavior of diffusion waves can be obtained by ...
Remhof, A.   +2 more
openaire   +3 more sources

Two-parameter boundary condition applied to transverse acoustic impedance of a Fermi liquid

open access: yes, 2017
We discuss surface scattering in terms of bidirectional reflectance distribution function. We formulate a boundary condition that in addition to diffuse and specular reflection has tilted diffuse reflection.
Kuorelahti, J. A., Thuneberg, E. V.
core   +1 more source

Study on the Effect of Blood Content on Diffuse Reflectance Spectra of Basal Cell Carcinoma Skin Tissue

open access: yesThe Scientific World Journal, 2013
Diffuse reflectance spectrum as a noninvasive method has been widely used to study the optical properties of cutaneous skin tissue. In this work, we optimized an eight-layered optical model of basal cell carcinoma skin tissue to study its optical ...
Miaoqing Nan, Qingli He
doaj   +1 more source

Dual-Slope Diffuse Reflectance Instrument for Calibration-Free Broadband Spectroscopy

open access: yesApplied Sciences, 2021
This work presents the design and validation of an instrument for dual-slope broadband diffuse reflectance spectroscopy. This instrument affords calibration-free, continuous-wave measurements of broadband absorbance of optically diffusive media, which ...
Giles Blaney   +8 more
doaj   +1 more source

Remote estimation of the diffuse attenuation coefficient in a moderately turbid estuary [PDF]

open access: yes, 1991
Solutions of the radiative transfer equation are used to derive relationships of water reflectance to the diffuse attenuation coefficient (K) in moderately turbid water (K \u3e 0.5 m−1).
Pennock, Jonathan, Stumpf, Richard P.
core   +3 more sources

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