Results 21 to 30 of about 993,566 (290)

Kubo-greenwood Formula For The Exponential Absorption Region Of Amorphous Semiconductors And Distribution Of The Density Of Electronic States In The Tail Of The Conduction Band

Journal of Applied Science and Engineering, 2023
The region of exponential absorption of the spectra of amorphous semiconductors is theoretically investigated using the Davis-Mott approximation method from the Kubo-Greenwood formula.
R.G. Ikramov, Kh. A. Muminov, O.T. HolmirzaeV, B.Q. Sultonov, M.A. Nuriddinova   +4 more
doaj   +1 more source

Effect of doping on the optical properties of lanthanum-gallium tantalate [PDF]

Modern Electronic Materials, 2023
Nominally pure lanthanum-gallium tantalate La3Ga5.5Ta0.5O14 crystals doped with aluminum, silicon and gallium oxide to above stoichiometric content have been grown by the Czochralski technique in iridium crucibles in argon and in agron with addition of ...
Evgeniya V. Zabelina, Nina S. Kozlova, Oleg A. Buzanov   +2 more
doaj   +3 more sources

Identification of melamine in milk using mid-infrared spectrometry [PDF]

BIO Web of Conferences
The paper presents a study of the infrared spectra of milk with melamine in the middle spectral range. The presence of absorption bands in the infrared spectra of a standard sample of melamine, milk without it and with its addition in different ...
Kalyuzhnaya T. V., Drozd A. V.
doaj   +1 more source

Empirical line lists and absorption cross sections for methane at high temperature [PDF]

, 2015
Hot methane is found in many "cool" sub-stellar astronomical sources including brown dwarfs and exoplanets, as well as in combustion environments on Earth.
Bailey, Jeremy, Bernath, Peter F., Dulick, Michael, Hargreaves, Robert J.   +3 more
core   +3 more sources

QM/MM Benchmarking of Cyanobacteriochrome Slr1393g3 Absorption Spectra

Molecules, 2019
Cyanobacteriochromes are compact and spectrally diverse photoreceptor proteins that are promising candidates for biotechnological applications. Computational studies can contribute to an understanding at a molecular level of their wide spectral tuning ...
Christian Wiebeler, Igor Schapiro
doaj   +1 more source

A Theoretical Proposal for an Actively Controlled Ultra-Wideband Absorber Based on Vanadium Dioxide Hybrid Metamaterials

Applied Sciences, 2022
In this study, an ultra-wideband actively tunable terahertz absorber composed of four identical arc-shaped structures made of phase transition material vanadium dioxide (VO2) is presented.
Ubaid Ur Rahman Qureshi, Muhammad Ismail Khan, Bin Hu   +2 more
doaj   +1 more source

Data analysis in extended x-ray-absorption fine structure: Determination of the background absorption and the threshold energy [PDF]

, 1983
Two approaches for the determination of the background absorption (μ_0) in the extended x-ray-absorption fine structure (EXAFS) are presented. Both methods, experimental and computational, take advantage of the damping of the EXAFS amplitude resulting ...
Baldeschwieler, John D., Boland, John J., Halaka, Folim G.   +2 more
core   +1 more source

Analysis of Spectral Characteristics of Certain Polyene Antibiotics in the Presence of Dmso and Cholesterol

Антибиотики и Химиотерапия
This work presents ultraviolet (UV) spectra of various concentrations of polyene antibiotics. The spectra of Levorin and Amphotericin B differ in three main absorption maxima.
G. H. Sultanova, T. J. Pashazade, Kh. M. Kasumov   +2 more
doaj   +1 more source

Absorption spectra of nanodiamond aqueous dispersions by optical absorption and optoacoustic spectroscopies

Photoacoustics, 2018
The multispectral modality and technique for optically dense samples of optoacoustic spectroscopy were applied to measure spectra and high absorbances of concentrated aqueous dispersions of undoped nanodiamonds.
L.O. Usoltseva, D.S. Volkov, D.A. Nedosekin, M.V. Korobov, M.A. Proskurnin, V.P. Zharov   +5 more
doaj   +1 more source

Emission from Water Vapor and Absorption from Other Gases at 5-7.5 Microns in Spitzer-IRS Spectra of Protoplanetary Disks [PDF]

, 2014
We present spectra of 13 T Tauri stars in the Taurus-Auriga star-forming region showing emission in Spitzer Space Telescope Infrared Spectrograph (IRS) 5-7.5 micron spectra from water vapor and absorption from other gases in these stars' protoplanetary ...
Calvet, N., D'Alessio, P., Forrest, W., Furlan, E., Green, J., Kim, K. H., Pontoppidan, K., Richter, I., Sargent, B. A., Tayrien, C., Watson, D. M.   +10 more
core   +2 more sources