Results 41 to 50 of about 798,983 (300)

Weak compressible magnetohydrodynamic turbulence in the solar corona

, 2005
This Letter presents a calculation of the power spectra of weakly turbulent Alfven waves and fast magnetosonic waves ("fast waves") in low-beta plasmas.
Benjamin D. G. Chandran, J. Shebalin, V. E. Zakharov, V. E. Zakharov   +3 more
core   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

First fluctuation measurements using an Imaging Neutral Particle Analyzer on DIII-D

Nuclear Fusion
A recent upgrade to the Imaging Neutral Particle Analyzer (INPA) on DIII-D has allowed for the first fluctuation measurements using an INPA to be taken during a neoclassical tearing mode (NTM).
K.R. Gage, X.D. Du, W.W. Heidbrink, J. Gonzalez-Martin, D. Liu, A.C. Brown   +5 more
doaj   +1 more source

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Observation of bi-directional global Alfvén eigenmodes in the MAST-U tokamak

Nuclear Fusion
The first observations and classification of deuterium beam-driven sub-cyclotron frequency range Alfvén eigenmodes (AEs) are presented for the MAST-Upgrade tokamak. Sets of observed eigenmodes are separated in frequency by approximately 200 kHz.
M.B. Dreval, H.J.C. Oliver, S.E. Sharapov, J.F. Rivero-Rodriguez, M. Fitzgerald, C. Michael, R. Ochoukov, L. Velarde, M. Cecconello, D. Ryan, the MAST-U Team   +10 more
doaj   +1 more source

Study on the Full Electromagnetic Model of Collective Thomson Scattering in Magnetic Confinement Fusion

发电技术
ObjectivesCollective Thomson scattering (CTS) is one of the few fusion diagnostic technologies that can provide fast ion kinetic property measurement in the center of fusion devices.
FANG Xinyu, XIA Donghui, HUANG Mei, ZHANG Feng, DING Yonghua   +4 more
doaj   +1 more source

Direct observation of particles with energy >10 MeV/u from laser-induced fusion in ultra-dense deuterium

, 2013
Nuclear fusion in ultra-dense deuterium D(-1) induced by 0.2 J pulses with 5 ns pulse length ejects ions with energies in the MeV range. The ns-resolved signal to a collector can be observed directly on an oscilloscope, showing ions arriving with ...
Holmlid, Leif
core   +1 more source

Fast ion conductors with rotating sulphate ions

Le Journal de Physique Colloques, 1980
X-ray and neutron diffraction studies of fcc Li2SO4 (575 to 860 °C for pure Li2SO4) show a high degree of spherical delocation of the sulphate ions. This strongly coupled rotation causes the dimensions of the cation positions to be varying all the time.
Aronsson, R., Jansson, B., Knape, H., Lundén, A., Nilsson, L., Sjöblom, C.-A., Torell, L.   +6 more
openaire   +2 more sources

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

Fast ion studies in the extended high-performance high βP plasma on EAST

Nuclear Fusion
Comprehending and optimizing fast ion behaviors is critical for the enhancement of performance in Experimental Advanced Superconducting Tokamak (EAST).
Y.X. Sun, J. Huang, X.Z. Gong, A.M. Garofalo, M. Salewski, J. Varela, J.P. Qian, X.J. Zhang, T.S. Fan, J.F. Wang, W. Zhang, B.L. Hao, W. Gao, J.F. Chang, G.Q. Zhong, Q. Zang, H.Q. Liu, B. Lyu, Y.H. Xie, X.H. Wang   +19 more
doaj   +1 more source