Results 21 to 30 of about 19,779 (264)

The Role of Nitrogen-Rich Moieties in the Selection of Arginine’s Tautomeric Form at Different Temperatures

open access: yesActa Chimica Slovenica, 2023
It is well known that the guanidinium group in Arginine plays an important role in noncovalent interactions. However, its role is not well documented since the selection of its global minimum structure is still controversial.
Aned de Leon   +4 more
doaj   +1 more source

Floquet engineering clock transitions in magnetic molecules [PDF]

open access: yesAPL Quantum
We theoretically study Floquet engineering of magnetic molecules via a time-periodic magnetic field that couples to the emergent total electronic spin of the metal center.
Andrew Cupo   +4 more
doaj   +1 more source

Appearance of branched motifs in the spectra of BCN type Polychronakos spin chains

open access: yesNuclear Physics B, 2020
As is well known, energy levels appearing in the highly degenerate spectra of the AN−1 type of Haldane-Shastry and Polychronakos spin chains can be classified through the motifs, which are characterized by some sequences of the binary digits like ‘0’ and
Bireswar Basu-Mallick, Madhurima Sinha
doaj   +1 more source

Spin and valley degrees of freedom in a bilayer graphene quantum point contact: Zeeman splitting and interaction effects

open access: yesPhysical Review Research, 2022
We present a study on the lifting of degeneracy of the size-quantized energy levels in an electrostatically defined quantum point contact in bilayer graphene by the application of in-plane magnetic fields.
Vanessa Gall   +3 more
doaj   +1 more source

Surface-Related States in Oxidized Silicon Nanocrystals Enhance Carrier Relaxation and Inhibit Auger Recombination

open access: yesNanoscale Research Letters, 2008
We have studied ultrafast carrier dynamics in oxidized silicon nanocrystals (NCs) and the role that surface-related states play in the various relaxation mechanisms over a broad range of photon excitation energy corresponding to energy levels below and ...
Nassiopoulou AG   +2 more
doaj   +1 more source

Riemann-Hilbert Problem with Higher Order Poles for Self-Induced Transparency with Degenerate Energy Levels [PDF]

open access: yesAustralian Journal of Physics, 1988
We have analysed the inverse problem for self-induced transparency with degenerate energy levels (DSIl) via the Riemann-Hilbert methodology with second order poles. The required formulae are deduced in detail and the corresponding soliton solutions are obtained. It is noticed that the profile of the single soliton is not of the usual sech type.
A Roy Chowdhury, Mrityunjoy De
openaire   +1 more source

Global existence and nonexistence for a class of finitely degenerate coupled parabolic systems with high initial energy level

open access: yesDiscrete and Continuous Dynamical Systems - S, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chen, Yuxuan, Han, Jiangbo
openaire   +2 more sources

Features of third-order optical nonlinearity in carbon disulfide

open access: yesSemiconductor Physics, Quantum Electronics & Optoelectronics, 2019
Degenerate four-wave mixing (DFWM) processes in carbon disulfide have been experimentally studied applying the wavelength dependent femtosecond laser source. The quantum mechanical perturbation theory was applied to analyze the experimental data.
L.V. Poperenko
doaj   +1 more source

Motivations for using the item response theory nominal response model to rank responses to multiple-choice items

open access: yesPhysical Review Physics Education Research, 2022
Several recent studies have employed item response theory (IRT) to rank incorrect responses to commonly used research-based multiple-choice assessments. These studies use Bock’s nominal response model (NRM) for applying IRT to categorical (nondichotomous)
Trevor I. Smith, Nasrine Bendjilali
doaj   +1 more source

Serum Myonectin Levels Are Positively Associated With Physical Function and Lower Frailty‐Related Limitation in Maintenance Hemodialysis Patients: A Cross‐Sectional Study

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Maintenance hemodialysis (MHD) patients frequently suffer from frailty, characterized by reduced physical function and poor prognosis. Myokines, such as myonectin, secreted by muscle, are emerging regulators of systemic health. This study investigated the relationship between serum myonectin, adipokines (adiponectin, omentin), and ...
Kenichi Kono   +7 more
wiley   +1 more source

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