Results 11 to 20 of about 176,371 (204)

Early Noninvasive Monitoring of Hypoxic State of Diabetic Foot Based on Diffuse Reflectance Spectroscopy

open access: yesFrontiers in Physics, 2022
Early accurate diagnosis and assessment severity of the hypoxic state of diabetic foot is of paramount importance. In this paper, a noninvasive monitoring method of the hypoxic state of the diabetic foot based on diffuse reflectance spectroscopy is ...
Ge Xu   +17 more
doaj   +1 more source

Diffuse Reflectance Spectroscopy of the Oral Mucosa: In Vivo Experimental Validation of the Precancerous Lesions Early Detection Possibility

open access: yesDiagnostics, 2023
This article is devoted to the experimental validation of the possibility of early detection of precancerous lesions in the oral mucosa in vivo using diffuse reflectance spectroscopy in the wavelength range from 360 to 1000 nm. During the study, a sample
Alexander V. Kolpakov   +10 more
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

EXPLORE THE CHARACTER OF SOIL SPECTRAL REFLECTANCE RELATE TO THE SOIL ORGANIC MATTER CONTENT

open access: yesJurnal Teknik Pertanian Lampung, 2019
The visible and near-infrared (Vis-NIR) diffuse reflectance spectroscopy has emerged as a rapid and low-cost tool for extensive investigation of soil properties.
Sari Virgawati   +5 more
doaj   +1 more source

Characterizing “Chocolate” Flint Using Reflectance Spectroscopy

open access: yesArchaeologia Polona, 2018
The study details a pilot experiment in which samples of “chocolate’”flint from four procurement sites in Poland and chert from the United States were characterized spectrally and distinguished using reflectance spectroscopy and multivariate statistics ...
Ryan M. Parish, Dagmara H. Werra
doaj   +1 more source

Assessing the amount of the anatase and rutile phases of TiO2 by optical reflectance measurements

open access: yesResults in Physics, 2021
The anatase (A) and rutile (R) phases of a series of titanium dioxide (TiO2) samples were investigated by optical diffuse reflectance spectroscopy. The samples consisted of commercial A and R high-purity TiO2 powders mixed together according to the Rmass/
A.R. Zanatta
doaj   +1 more source

Visible and near infrared spectroscopy in soil science [PDF]

open access: yes, 2010
This chapter provides a review on the state of soil visible–near infrared (vis–NIR) spectroscopy. Our intention is for the review to serve as a source of up-to date information on the past and current role of vis–NIR spectroscopy in soil science.
Mouazen, Abdul Moune   +3 more
core   +1 more source

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

Epoxidation of alkenes using immobilized vanadyl Schiff base complex on montmorillonite as an efficient recyclable heterogeneous catalyst with tert-butyl hydroperoxide [PDF]

open access: yesشیمی کاربردی روز, 2016
Oxovanadium(IV) Schiff base complex of N,N′-bis(5-[(triphenylphosphoniumchloride)-methyl-salicylidinenaphthal-diamine)] was synthesized, characterized and immobilized on sodium montmorillonite as a heterogeneous catalyst.
Abolfazl Bezaatpour   +1 more
doaj   +1 more source

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