Results 21 to 30 of about 285 (142)

Dispersive X‐ray absorption spectroscopy using independent grazing‐incidence focusing and convexly bent Bragg‐crystal dispersing optics

Journal of Synchrotron Radiation, Volume 32, Issue 4, Page 1068-1084, July 2025.
A dispersive X‐ray absorption spectroscopy instrument has been developed and implemented at the Advanced Photon Source's Advanced Spectroscopy Beamline. The instrument uses a convexly bent Bragg‐crystal analyzer to disperse a polychromatic X‐ray beam and independent Kirkpatrick–Baez mirrors for focusing, thereby providing a simple and flexible method ...
Juanjuan Huang, Adam P. Tornheim, Xianbo Shi, Mark Wolfman, Yanna Chen, Steve M. Heald, Shelly D. Kelly, George E. Sterbinsky   +7 more
wiley   +1 more source

Oxidative Assemblies of Flavonoids (Quercetin, Morin) to Form Dimer in Weak Base Circumstances and Its Mechanism Analysis by UPLC‐ESI‐TSQ‐MS/MS

Food Chemistry International, Volume 1, Issue 2, Page 167-182, June 2025.
Product identification of flavonoids under weak base conditions and mechanism analysis of dimer formation by the oxidative assembly of quercetin and morin, respectively. ABSTRACT Flavonoids are susceptible to autoxidation in aqueous solutions, which is largely dependent on pH, generating various free radicals and oxidation products. Quercetin and morin
Pengren Zou, Susan Jyakhwo, Paz Otero, Shengxiong Chen, Celia Costas, Carla Cameselle, Fan Zhang, Hui Cao   +7 more
wiley   +1 more source

Exciton Diffusion in Two‐dimentional Chiral Perovskites

Advanced Optical Materials, Volume 13, Issue 11, April 14, 2025.
Transport of light‐emitting excitons is demonstrated in 2D chiral perovskites via transient optical microscopy. The excitons are found to diffuse rapidly after the excitation followed by localization at longer time‐scales. Temperature‐dependent exciton propagation combined with photothermal deflection spectroscopy measurements reveal the role of ...
Sophia Terres, Lucas Scalon, Julius Brunner, Dominik Horneber, Johannes Düreth, Shiyu Huang, Takashi Taniguchi, Kenji Watanabe, Ana Flávia Nogueira, Sven Höfling, Sebastian Klembt, Yana Vaynzof, Alexey Chernikov   +12 more
wiley   +1 more source

Groups with all Subgroups Subnormal or Nilpotent-by-Chernikov

Rendiconti del Seminario Matematico della Università di Padova, 2011
An important result by \textit{W. Möhres} [Arch. Math. 54, No. 3, 232-235 (1990; Zbl 0663.20027)] shows that any group in which all subgroups are subnormal is soluble. Using this theorem, \textit{H. Smith} [Topics in infinite groups. Rome: Aracne. Quad. Mat.
openaire   +3 more sources

The Yenisei Makes the Weather: The Microclimate of the Krasnoyarsk Dam and Its Research, 1960s–1990s

The Russian Review, Volume 84, Issue 2, Page 249-266, April 2025.
Abstract When Soviet authorities began building the Krasnoyarsk Dam in 1956, the Yenisei River had an ice‐free period of only 112 days a year. The thick and long‐lasting ice impeded dam building and navigation. However, as the dam rose, it produced an environmental anomaly; for more than 200 kilometers downstream, the Yenisei became ice‐free year‐round.
Mariia Koskina
wiley   +1 more source

Magneto‐Spectroscopy of Interlayer Excitons in Transition‐Metal Dichalcogenide Heterostructures

physica status solidi (b), Volume 262, Issue 3, March 2025.
Combining two different transition‐metal dichalcogenide monolayers can lead to a type‐II band alignment and formation of interlayer excitons (ILE). In diselenide heterobilayers, bright ILE are observable if the interlayer twist angle is close to 0° or 60°.
Johannes Holler, Malte Selig, Dmitry S. Smirnov, Michael Kempf, Jonas Zipfel, Philipp Nagler, Manuel Katzer, Florian Katsch, Mariana V. Ballottin, Anatolie A. Mitioglu, Alexey Chernikov, Peter C. M. Christianen, Christian Schüller, Andreas Knorr, Tobias Korn   +14 more
wiley   +1 more source

On Chernikov-by-nilpotent groups

Let $γ_k=[x_1,\dots,x_k]$ be the $k$-th lower central group-word. Given a group $G$, we write $X_k(G)$ for the set of $γ_k$-values and $γ_k(G)$ for the $k$-th term of the lower central of $G$. This paper deals with groups in which $\langle g^{X_k(G)} \rangle$ is a Chernikov group of size at most $(m,n)$ for all $g\in G$. The main result is that $γ_{k+1}
Capasso, Martina, Lancellotti, Liliana, Shumyatsky, Pavel   +2 more
openaire   +2 more sources

Formulation of perfect‐crystal diffraction from Takagi–Taupin equations: numerical implementation in the crystalpy library

Journal of Synchrotron Radiation, Volume 31, Issue 6, Page 1469-1480, November 2024.
The Takagi–Taupin equations are solved in their simplest form (zero deformation) and equations of the diffracted and transmitted amplitudes are obtained using a matrix model. The theory presented is coded in the open‐source software package crystalpy.The Takagi–Taupin equations are solved in their simplest form (zero deformation) to obtain the Bragg ...
Jean-Pierre Guigay, Manuel Sanchez del Rio   +1 more
wiley   +1 more source

On certain groups with Chernikov group of automorphisms

Researches in Mathematics, 2014
We obtained automorphic analogue of Schur’s theorem for the case when an arbitrary subgroup A of automorphism group Aut(G) of a group G and the factor-group of a group G modulo A-center are Chernikov groups.
openaire   +1 more source

On nilpotent Chernikov 2-groups with elementary tops

, 2016
We give an explicit description of nilpotent Chernikov 2-groups with elementary tops and the basis of rank 2.
Drozd, Y.A., Plakosh, A.I.
openaire   +3 more sources