Results 21 to 30 of about 134,130 (301)

X-ray Emission Spectroscopy of Single Protein Crystals Yields Insights into Heme Enzyme Intermediates

, 2022
Enzyme reactivity is often enhanced by changes in oxidation state, spin state, and metal-ligand covalency of associated metallocofactors. The development of spectroscopic methods for studying these processes coincidentally with structural rearrangements ...
Olga, Maximova, Yulia, Pushkar, Vatsal, Purohit, Kirklin L., McWhorter, Kendra A., Ireland, Winter, Allen, Katherine, Davis, Scott, Jensen, Diego, Casa, Sahand, Emamian   +9 more
core   +1 more source

Polycrystalline Compound of Co2+-doped Zn2SnO4: Structural and Photoluminescent Properties

Materials Research, 2021
In this work, Zn2SnO4:Co2+ (0.1%) was obtained through a solid-state reaction at high temperature using ZnO, SnO2, and CoCO3. The sample was investigated using X-ray diffraction, X-ray fluorescence, scanning electron microscopy, and photoluminescence ...
T. L. Alvarenga, S. S. Pedro, A. López, L. P. Sosman   +3 more
doaj   +1 more source

X-ray Photoelectron Spectroscopy Study of Electronic Structure of Graphene Nanosheets

Фізика і хімія твердого тіла, 2016
Investigations of graphene nanosheets and oxidized graphene nanosheets were carried out using X-rayphotoelectron spectroscopy. Scanning and transmission electron microscopy investigations were used in additionto X-ray photoelectron spectroscopy.
B. I. Ilkiv, S. S. Petrovska, R. A. Sergienko, О. О. Foya, O. V. Ilkiv, T. N. Bondarenko, E. Shibata, T. Nakamura, Ya. V. Zaulychnyy   +8 more
doaj   +1 more source

Experimental capabilities for liquid jet samples at sub-MHz rates at the FXE Instrument at European XFEL

Journal of Synchrotron Radiation, 2023
The Femtosecond X-ray Experiments (FXE) instrument at the European X-ray Free-Electron Laser (EuXFEL) provides an optimized platform for investigations of ultrafast physical, chemical and biological processes.
F. A. Lima, F. Otte, M. Vakili, F. Ardana-Lamas, M. Biednov, F. Dall'Antonia, P. Frankenberger, W. Gawelda, L. Gelisio, H. Han, X. Huang, Y. Jiang, M. Kloos, T. Kluyver, M. Knoll, K. Kubicek, I. J. Bermudez Macias, J. Schulz, O. Turkot, Y. Uemura, J. Valerio, H. Wang, H. Yousef, P. Zalden, D. Khakhulin, C. Bressler, C. Milne   +26 more
doaj   +1 more source

X-Ray and Near-Infrared Spectroscopy of Dim X-Ray Point Sources Constituting the Galactic Ridge X-Ray Emission

Acta Polytechnica CTU Proceedings, 2014
We present the results of X-ray and Near-Infrared observations of the Galactic Ridge X-ray Emission (GRXE). We extracted 2,002 X-ray point sources in the Chandra Bulge Field (l =0°.113, b = 1°.424) down to ~10-14.8 ergscm-2s-1 in 2-8 keV band with the ...
Kumiko Morihana, Masahiro Tsujimoto, Ken Ebisawa   +2 more
doaj   +1 more source

A química analítica aplicada aos estudos de pigmentos rupestres: uma revisão [PDF]

Química Nova, 2023
Instrumental advances have been employed in the study of archeological remains such as prehistoric rupestrians paintings with the objective of chemically characterizing them in order to reconstruct the cultural technologies of a prehistoric human group ...
Benedito B. Farias Filho, Maria Conceição S. M. Lage, Ana Luisa M. L. do Nascimento, Iasmin Maria R. de S. Vieira, Danyel Douglas M. de Almeida, Wilkins O. de Barros   +5 more
doaj   +1 more source

Peculiarities of electronic structure and composition in ultrasound milled silicon nanowires

Results in Physics, 2020
The combined X-ray absorption and emission spectroscopy approach was applied for the detailed electronic structure and composition studies of silicon nanoparticles produced by the ultrasound milling of heavily and lowly doped Si nanowires formed by metal-
E.V. Parinova, A.K. Pisliaruk, A. Schleusener, D.A. Koyuda, R.G. Chumakov, A.M. Lebedev, R. Ovsyannikov, A. Makarova, D. Smirnov, V. Sivakov, S.Yu. Turishchev   +10 more
doaj   +1 more source

Visualization of elemental distributions and local analysis of element-specific chemical states of an Arachnoidiscus sp. frustule using soft X-ray spectromicroscopy.

PLoS ONE, 2020
Using soft X-ray (SX) spectromicroscopy, we show maps of the spatial distribution of constituent elements and local analysis of the density of states (DOS) related to the element-specific chemical states of diatom frustules, which are composed of ...
Tomoko Ishihara, Takuo Ohkochi, Akinobu Yamaguchi, Yoshinori Kotani, Masaki Oura   +4 more
doaj   +1 more source

Informed Chemical Classification of Organophosphorus Compounds via Unsupervised Machine Learning of X-ray Absorption Spectroscopy and X-ray Emission Spectroscopy

, 2022
We analyze an ensemble of organophosphorus compounds to form an unbiased characterization of the information encoded in their X-ray absorption near edge structure (XANES) and valence-to-core X-ray emission spectra (VtC-XES).
Samantha, Tetef, Vikram, Kashyap, Alexandra, Velian, Niranjan, Govind, Gerald, Seidler   +4 more
core   +1 more source

Suzaku Spectroscopy of Extended X-Ray Emission in M17 [PDF]

Publications of the Astronomical Society of Japan, 2008
Abstract We present the results of a Suzaku spectroscopic study of soft extended X-ray emission in the HII region of M17. The spectrum of the extended emission was obtained with a high signal-to-noise ratio in a spatially resolved manner using the X-ray Imaging Spectrometer (XIS).
Hyodo, Yoshiaki, Tsujimoto, Masahiro, Hamaguchi, Kenji, Koyama, Katsuji, Kitamoto, Shunji, Maeda, Yoshitomo, Tsuboi, Yohko, Ezoe, Yuichiro   +7 more
openaire   +2 more sources