Results 41 to 50 of about 176,371 (204)

Materiais híbridos orgânico-inorgânicos (ormosil) obtidos por sol-gel com potencial uso como filtro solar

Química Nova, 2011
This work aimed at the synthesis and characterization of particles of modified silica containing the organic filter dibenzoylmethane (DBM) by the hydrolytic sol-gel method, with modifications to the Stöber route.
Jane K. de F. B. Machado, Alex L. Marçal, Omar J. de Lima, Katia J. Ciuffi, Eduardo J. Nassar, Paulo S. Calefi   +5 more
doaj   +1 more source

Diffuse reflectance mid-infrared spectroscopy is viable without fine milling

Soil Security, 2023
While diffuse reflectance Fourier transform mid-infrared spectroscopy (mid-DRIFTS) has been established as a viable low-cost surrogate for traditional soil analyses, the assumed need for fine milling of soil samples prior to analysis is constraining the ...
Jonathan Sanderman, Colleen Smith, José Lucas Safanelli, Cristine L.S. Morgan, Jason Ackerson, Nathaniel Looker, Cara Mathers, Rebecca Keating, Ashok A. Kumar   +8 more
doaj   +1 more source

Single fiber reflectance spectroscopy calibration [PDF]

Journal of Biomedical Optics, 2017
To accurately determine sample optical properties using single fiber reflectance spectroscopy (SFR), an absolute calibration of the reflectance is required. We investigated two SFR calibration methods, using a calibrated mirror and using the Fresnel reflection at the fiber tip as a reference.
Zhang, Xu U., Post, Anouk L., Faber, Dirk J., Van Leeuwen, Ton G., Sterenborg, Henricus J.C.M.   +4 more
openaire   +3 more sources

A note on the comparison of three near infrared reflectance spectroscopy calibration strategies for assessing herbage quality of ryegrass [PDF]

, 2014
peer-reviewedPerennial ryegrass (n = 1,836), Italian ryegrass (n = 137) and hybrid ryegrass (n = 103) herbage was taken from harvested plots from the Irish national variety evaluation scheme and analysed for in vitro dry matter digestibility, water ...
Burns, G. A., Gilliland, T. J., Grogan, D., O'Kiely, Padraig   +3 more
core  

Direct Observation of Monolayer MoS₂ Prepared by CVD Using In-Situ Differential Reflectance Spectroscopy

Nanomaterials, 2019
The in-situ observation is of great significance to the study of the growth mechanism and controllability of two-dimensional transition metal dichalcogenides (TMDCs).
Yina Wang, Lei Zhang, Chenhui Su, Hang Xiao, Shanshan Lv, Faye Zhang, Qingmei Sui, Lei Jia, Mingshun Jiang   +8 more
doaj   +1 more source

In situ measurement of the spectral reflectance of mirror-like metallic surfaces during plasma exposition

Nuclear Materials and Energy, 2018
Visible spectroscopy in fusion plasmas crucially depends on the optical properties of first mirrors withstanding a considerable amount of radiation and particle fluxes.
Sven Dickheuer, Oleksandr Marchuk, Stephan Ertmer, Andrei Goriaev, Mykola Ialovega, Beatrix Göths, Yury Krasikov, Philippe Mertens, Arkadi Kreter   +8 more
doaj   +1 more source

Probing hyperbolic polaritons using infrared attenuated total reflectance micro-spectroscopy

, 2018
Hyperbolic polariton modes are highly appealing for a broad range of applications in nanophotonics, including surfaced enhanced sensing, sub-diffractional imaging and reconfigurable metasurfaces.
Caldwell, Joshua D., Edgar, James H., Folland, Thomas G., Liu, Song, Matson, Joseph R., Maß, Tobias W. W., Nolen, J. Ryan, Taniguchi, Takashi, Taubner, Thomas, Watanabe, Kenji   +9 more
core   +1 more source

Instrument independent diffuse reflectance spectroscopy [PDF]

Journal 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, Fu, Henry L, Ramanujam, Nirmala   +2 more
openaire   +2 more sources

Machine learning classification of human joint tissue from diffuse reflectance spectroscopy data [PDF]

, 2019
Objective: To assess if incorporation of DRS sensing into real-time robotic surgery systems has merit. DRS as a technology is relatively simple, cost-effective and provides a non-contact approach to tissue differentiation.
Chipper, Richard, Fick, Daniel, Goncalves, Joshua, Gunaratne, Rajitha, Ironside, Charles N, Kapfer, Michael, Khan, Riaz, Monteath, Issac, Robertson, Brett, Sheh, Raymond   +9 more
core   +1 more source

Far-infrared and submillimeter-wave conductivity in electron-doped cuprate La_{2-x}Ce_xCuO_4

, 2002
We performed far-infrared and submillimeter-wave conductivity experiments in the electron-doped cuprate La_{2-x}Ce_xCuO_4 with x = 0.081 (underdoped regime, T_c = 25 K). The onset of the absorption in the superconducting state is gradual in frequency and
A Loidl, A Pimenov, A Tsukada, A. V Pronin, Bonn D. A., Cardona M., Fournier P., Heavens O. S., M Naito, Naito M., Pimenov A., Pimenov A., Posazhennikova A. I., Schützmann J.   +13 more
core   +1 more source