Results 21 to 30 of about 579,715 (353)

Near-Field IR Orientational Spectroscopy of Silk

open access: yesApplied Sciences, 2019
Orientational dependence of the IR absorbing amide bands of silk is demonstrated from two orthogonal longitudinal and transverse microtome slices with a thickness of only ∼100 nm.
Meguya Ryu   +7 more
doaj   +1 more source

Nanoscale Infrared Imaging Analysis of Carbonaceous Chondrites to Understand Organic-Mineral Interactions During Aqueous Alteration [PDF]

open access: yes, 2019
Organic matter in carbonaceous chondrites is distributed in fine-grained matrix. To understand pre- and postaccretion history of organic matter and its association with surrounding minerals, microscopic techniques are mandatory.
Baden, Naoki   +6 more
core   +2 more sources

An Effective Semiclassical Approach to IR Spectroscopy [PDF]

open access: yes, 2019
We present a novel approach to calculate molecular IR spectra based on semiclassical molecular dynamics. The main advance from a previous semiclassical method [M. Micciarelli, R. Conte, J. Suarez, M. Ceotto J. Chem. Phys.
Ceotto, Michele   +3 more
core   +2 more sources

Germanium quantum dots: Optical properties and synthesis [PDF]

open access: yes, 1994
Three different size distributions of Ge quantum dots (>~200, 110, and 60 Å) have been synthesized via the ultrasonic mediated reduction of mixtures of chlorogermanes and organochlorogermanes (or organochlorosilanes) by a colloidal sodium/potassium alloy
Alivisatos, A. P.   +2 more
core   +1 more source

Selection of collector composition and temperature conditions for diamond foam separation [PDF]

open access: yesJournal of Mining and Metallurgy. Section A: Mining, 2022
Quantitative and qualitative regularities of a collector low and high molecular weight fractions distribution between solid and liquid phases in foam separation process were determined with the use of extraction-spectrophotometrical technique.
Morozov V.V.   +4 more
doaj   +1 more source

2-{2,6-Bis[bis(4-fluorophenyl)methyl]-4-chlorophenylimino} -3-aryliminobutylnickel(II) bromide complexes: Synthesis, characterization, and investigation of their catalytic behavior [PDF]

open access: yes, 2014
The series of 2-{2,6-bis[di(4-fluorophenyl)methyl]-4-chlorophenylimino}-3- aryliminobutane derivatives (L1-L5) and their nickel(II) dibromide complexes (Ni1-Ni5) were synthesized, and all organic compounds were fully characterized by the Fourier ...
Hao, Xiang   +5 more
core   +2 more sources

Analysis of the optical spectra of transformer oils in range 850 - 1000 nm

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2017
In the present manuscript the results of the analysis of structural-group composition of transformer and turbine oils are described based on optical spectra in the range of 850 - 1000 nm.
YU. K. Bikkinyaeva   +3 more
doaj   +1 more source

Thick tori around AGN: the case for extended tori and consequences for their X-ray and IR emission [PDF]

open access: yes, 1997
Two families of models of dusty tori in AGNs (moderately thick and extended versus very thick and compact) are tested against available observations. The confrontation suggests that the former class better explains the IR broad-band spectra of both broad
Alberto Franceschini   +26 more
core   +3 more sources

Structural changes in V2O5-P2O5 glasses: non-constant force field molecular dynamics and IR spectroscopy

open access: yesChimica Techno Acta, 2021
Quasi-binary phosphate-vanadate glasses have been studied by both IR spectroscopy and a novel method of molecular dynamics with a non-constant force field. This method is used for the self-assembly of structural models of glasses. The obtained models and
A. A. Raskovalov   +2 more
doaj   +1 more source

Application of Spectroscopy Methods for Indication and Identification of Pathogenic Biological Agents

open access: yesПроблемы особо опасных инфекций, 2011
The review presents data on application of UV, IR and optical spectroscopy methods for non-specific indication of pathogenic biological agents, and IR Fourier spectroscopy, and Raman spectroscopy - for their identification.
D. V. Utkin   +3 more
doaj   +1 more source

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