Results 51 to 60 of about 882,651 (290)

Electrostatic and magnetic transport of energetic ions in turbulent plasmas [PDF]

, 2009
Analytical and numerical work is used in tandem to address the problem of turbulent transport of energetic ions in magnetized plasmas. It is shown that orbit averaging is not valid under rather generic conditions, and that perpendicular decorrelation ...
Hauff, T., Jenko, F., Pueschel, M. J., Dannert, T., Pueschel, M.   +4 more
core   +2 more sources

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

Energetic ion precipitation at Titan [PDF]

Geophysical Research Letters, 2008
Energetic protons and oxygen ions have been observed in Saturn's outer magnetosphere and can precipitate into Titan's atmosphere where they deposit energy, ionize, and drive ionospheric chemistry. Ion production rates caused by this precipitation are calculated using fluxes of incident 27 keV to 4 MeV protons measured by the Cassini MIMI instrument. We
T. E. Cravens, I. P. Robertson, S. A. Ledvina, D. Mitchell, S. M. Krimigis, J. H. Waite   +5 more
openaire   +1 more source

Chiral separation of chloroalkanes with the chromatographic column onboard Martian rovers

FEBS Letters, EarlyView.
Computer image of the Rosalind Franklin Rover of ESA's ExoMars mission. ExoMars is scheduled to land on planet Mars in Oxia Planum in 2029. This area represents an interesting spot to look for biosignatures. Investigations of ExoMars include measurement on molecular chirality. We show that chiral chloroalkanes, that have been identified on Mars, can be
Asma Merzougui, Agnes Banreti, Armelle L. Ernst, Guillaume Leseigneur, Uwe J. Meierhenrich   +4 more
wiley   +1 more source

Chapter 5: Physics of energetic ions [PDF]

, 2007
This chapter reviews the progress accomplished since the redaction of the first ITER Physics Basis (1999 Nucl. Fusion 39 2137–664) in the field of energetic ion physics and its possible impact on burning plasma regimes.
A Fasoli, N Gorelenkov, D Testa, Tobita, K., ZONCA, F, Y Todo, BREIZMAN, B, S Sharapov, Zonca, F., BERK, HL, W. W. Heidbrink, SHARAPOV, S, B. Breizman, C. Gormenzano, Fasoli, A., Noterdaeme, J. M., TOBITA, K, FASOLI, A, D. Testa, G Vlad, S.V Konovalov, Heidbrink, W. W., J. -m. Noterdaeme, Jaun, A., Shinohara, K., D.S Darrow, Gormenzano, C., Noterdaeme, J-M, A. Jaun, B Breizman, Briguglio, S., A. Fasoli, Sharapov, S., Noterdaeme, Jean-Marie, GORMENZANO, C, Todo, Y., Y. Todo, DARROW, DS, NAZIKIAN, R, Heidbrink, W., J.-M Noterdaeme, F Zonca, Berk, H. L., K. Shinohara, R Nazikian, Noterdaeme, J., H.L Berk, TESTA, D, S. Briguglio, Nazikian, R., R. Nazikian, Konovalov, S., Vlad, G., KONOVALOV, SV, Berk, H., Testa, D., Darrow, D. S., BRIGUGLIO, S, HEIDBRINK, WW, C Gormenzano, VLAD, G, K Shinohara, TODO, Y, W.W Heidbrink, Darrow, D., K Tobita, S. V. Konovalov, K. Tobita, Konovalov, S. V., S. Sharapov, F. Zonca, D. S. Darrow, Gorelenkov, N., H. L. Berk, S Briguglio, JAUN, A, G. Vlad, GORELENKOV, N, Breizman, B., SHINOHARA, K, N. Gorelenkov, Jaun, Andre,, A Jaun   +82 more
core   +1 more source

Artificial molecular machines and motors—Design and control of nanoscale motion

FEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

Very Large and Long-lasting Anisotropies Caused by Sunward Streaming Energetic Ions: Solar Orbiter and STEREO A Observations

The Astrophysical Journal Letters
The anisotropy of energetic particles provides essential information to help resolve the underlying fundamental physics of their spatial distributions, injection, acceleration, and transport processes. In this work, we report an energetic ion enhancement
Wenwen Wei, Christina O. Lee, N. Dresing, L. Y. Khoo, L. K. Jian, J. G. Luhmann, C. M. S. Cohen, F. Fraschetti, B. Zhuang, J. Huang, C. J. Owen, G. Nicolaou, L. Rodríguez-García, E. Palmerio, I. C. Jebaraj, B. J. Lynch, F. Carcaboso   +16 more
doaj   +1 more source

Impact of Radiation Quality on Microdosimetry and Chromosome Aberrations for High-Energy (>250 MeV/n) Ions

Life, 2022
Studying energy deposition by space radiation at the cellular scale provides insights on health risks to astronauts. Using the Monte Carlo track structure code RITRACKS, and the chromosome aberrations code RITCARD, we performed a modeling study of single-
Floriane Poignant, Ianik Plante, Luis Crespo, Tony Slaba   +3 more
doaj   +1 more source

Turbulent transport of energetic ions [PDF]

AIP Conference Proceedings, 2006
Approaching ITER operation, the issue of anomalous transport of fast particles becomes more and more important. This is partly because the ITER heating and current drive system relies heavily on neutral beam injection. Moreover burning plasmas are heated by fast fusion α particles.Fusion α particles are characterised by a fixed energy and an isotropic ...
Tilman Dannert, Thilo Hauff, Frank Jenko, Sibylle Günter   +3 more
openaire   +1 more source

Simulation study of energetic-ion mass dependence on nonlinear development of lower hybrid wave instabilities [PDF]

ORCID　0000-0003-2691-5068In both space and fusion plasmas, energetic ions with a ring-like velocity distribution are present in various ion species with different masses.
KOTANI, Tsubasa, TOIDA, Mieko
core   +1 more source