Results in Optics, 2020 A natural pigment Anthocyanin, extracted from blueberry, has been reported in this paper. The structure of blueberry powder was studied by X-ray diffraction (XRD) and it divulges that the prepared powder seems to be amorphous. Fourier transform infrared (
Sivanukkalai Jeyaram +1 more
doaj +2 more sources
Spectroscopic Characteristics and Coloring Mechanisms of Different Colored Spinels from Myanmar
Crystals, 2023 Spinel is a common gemstone that has attracted the attention of gemologists worldwide because of its high refractive index, rich colors and brilliant hues. Myanmar is an important source of spinel. The present paper provides a systematic characterization
Lei Zhang, Kui He, Qingfeng Guo
doaj +1 more source
Study on Gemological Characteristics and Inclusions of Yellow Topaz
Crystals, 2022 Topaz is a kind of mineral with variable composition and a common gemstone variety. Because of its wide distribution and rich colors, it has attracted the attention of scholars around the world.
Zixiong Song, Qingfeng Guo, Libing Liao
doaj +1 more source
Crystals, 2022 Single crystals of Tb3+ single-doped and Tb3+/Pr3+ co-doped CaYAlO4 were produced by the Czochralski method. The room-temperature polarized absorption spectra, emission spectra, and decay curves were recorded and analyzed in detail.
Yeqing Wang +7 more
doaj +1 more source
Temperature-Dependent Optical Properties of Graphene on Si and SiO2/Si Substrates
Crystals, 2021 Systematic investigations are performed to understand the temperature-dependent optical properties of graphene on Si and SiO2/Si substrates by using a variable angle spectroscopic ellipsometry. The optical constants of graphene have revealed changes with
Sisi Wu +5 more
doaj +1 more source
Spectroscopic characteristics of polar plumes [PDF]
Astronomy & Astrophysics, 2003 Extreme ultraviolet observations of plumes in polar coronal holes are presented and their spectroscopic signatures discussed. The study focuses on the base of plumes seen on the disk of the Sun with the Coronal DiagnosticSpectrometer (CDS) on the Solar and Heliospheric Observatory (SOHO) satellite.
G. Del Zanna +2 more
openaire +1 more source
An optical spectroscopic survey of the 3CR sample of radio galaxies with z<0.3. IV. Discovery of the new spectroscopic class of relic radio galaxies [PDF]
, 2011 From an optical spectroscopic survey of 3CR radio galaxies with ...
A. Capetti +33 more
core +2 more sources
Polyvinylpyrrolidone and polystyrene composites based on economical high quality biofillers derived from rice husk: Spectroscopic and hydrophilic investigations [PDF]
Polyolefins Journal, 2023 Polyvinylpyrrolidone (PVP) composites based on rice husk (RH), rice husk carbon (RHC, i.e., black rice husk ash (BRHA)) and rice husk ash (RHA, i.e., white rice husk ash (WRHA)) were prepared separately through solution casting method. Similar composites
Hamed NazarpourFard
doaj +1 more source
Lucky Spectroscopy, an equivalent technique to Lucky Imaging. Spatially resolved spectroscopy of massive close visual binaries using the William Herschel Telescope [PDF]
, 2018 CONTEXT: Many massive stars have nearby companions whose presence hamper their characterization through spectroscopy. AIMS: We want to obtain spatially resolved spectroscopy of close massive visual binaries to derive their spectral types.
Alfaro, E. J. +6 more
core +3 more sources
Transient jets in V617 Sagittarii [PDF]
, 2007 Some of the luminous Compact Binary Supersoft X-Ray sources (CBSS) have shown indications of jets, also called satellites due to their appearance in the spectra.
A. Damineli +28 more
core +1 more source