Results 71 to 80 of about 2,048,021 (302)

LARGE-SCALE REDUCTIONS IN THE ELECTRON DENSITY OF IONOSPHERIC F-REGION, OBSERVABLE ALONG ROCKET TRAJECTORIES AT LAUNCH

Radio Physics and Radio Astronomy, 2022
Purpose. The object of the study are electron density depletions (‘holes’) occurring in the ionospheric F-region under the action of rocket exhaust products.
L. F. Chernogor
doaj   +1 more source

Universal lower bounds on the kinetic energy of electronic systems with noncollinear magnetism

, 2018
The distribution of noncollinear magnetism in an electronic system provides information about the kinetic energy as well as some kinetic energy densities. Two different everywhere-positive kinetic densities related to the Schr\"odinger--Pauli Hamiltonian
Tellgren, Erik I.
core   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Combination of High-Rate Ionosonde Measurements with COSMIC-2 Radio Occultation Observations for Reference Ionosphere Applications

Atmosphere
Knowledge of ionospheric plasma altitudinal distribution is crucial for the effective operation of radio wave propagation, communication, and navigation systems.
Iurii Cherniak, David Altadill, Irina Zakharenkova, Víctor de Paula, Víctor Navas-Portella, Douglas Hunt, Antoni Segarra, Ivan Galkin   +7 more
doaj   +1 more source

Detection of laser-produced tin plasma emission lines in atmospheric environment by optical emission spectroscopy technique

Photonic Sensors, 2017
A spectroscopic study on laser-produced tin plasma utilizing the optical emission spectroscopy (OES) technique is presented. Plasma is produced from a solid tin target irradiated with pulsed laser in room environment.
Kadhim A. Aadim
doaj   +1 more source

Sum rule analysis of Umklapp processes and Coulomb energy: application to cuprate superconductivity

, 2002
The third moment frequency sum rule for the density-density correlation function is rederived in the presence of Umklapp processes. Upper and lower bounds on the electron-electron Coulomb energy are derived in two-dimensional and three-dimensional media,
A. J. Leggett, A. K. Rajagopal, A. L. Fetter, Anthony J. Leggett, D. J. Scalapino, E. Demler, H. J. A. Molegraaf, J. C. Kimball, K. Sturm, M. R. Norman, M. Rubhausen, Misha Turlakov, N. Iwamoto, N. Mihara, N. Nucker, N.D. Mermin, T. Kato, V. Emery, Yun-Yu Wang   +18 more
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Decomposition of d- and f-Shell Contributions to Uranium Bonding from the Quantum Theory of Atoms in Molecules: Application to Uranium and Uranyl Halides

Inorganics, 2018
The electronic structures of a series of uranium hexahalide and uranyl tetrahalide complexes were simulated at the density functional theoretical (DFT) level.
Jonathan Tanti, Meghan Lincoln, Andy Kerridge   +2 more
doaj   +1 more source

Dynamic correlations in symmetric electron-electron and electron-hole bilayers

, 2002
The ground-state behavior of the symmetric electron-electron and electron-hole bilayers is studied by including dynamic correlation effects within the quantum version of Singwi, Tosi, Land, and Sjolander (qSTLS) theory.
A. Holas, B. Tanatar, B. Tanatar, B. Tanatar, C. Attaccalite, Chao Zhang, D. Neilson, D. Neilson, Dexin Lu, F. Rapisarda, F. Stern, G. Goldoni, G. Goldoni, G. Kalman, G. Senatore, Gaetano Senatore, Giuseppe E. Santoro, Giuseppe E. Santoro, H. C. Manoharan, J. Hubbard, J. P. Eisenstein, J. Szymański, K. S. Singwi, K. S. Singwi, K. Tankeshwar, L. K. Saini, L. Świerkowski, Lerwen Liu, Lerwen Liu, Lian Zheng, M. Jonson, R. K. Moudgil, R. K. Moudgil, R. K. Moudgil, S. Das Sarma, S. De Palo, S. Moroni, T. Hasegawa, U. de Freitas, Y. W. Suen   +39 more
core   +1 more source

Linking neurogenesis, oligodendrogenesis, and myelination defects to neurodevelopmental disruption in primary mitochondrial disorders

FEBS Letters, EarlyView.
Mitochondrial remodeling shapes neural and glial lineage progression by matching metabolic supply with demand. Elevated OXPHOS supports differentiation and myelin formation, while myelin compaction lowers mitochondrial dependence, revealing mitochondria as key drivers of developmental energy adaptation.
Sahitya Ranjan Biswas, Porter L. Tomsick, Alicia M. Pickrell, Paul D. Morton   +3 more
wiley   +1 more source