Results 251 to 260 of about 882,651 (290)

The Energetics of Shooting Ions into the Dodecahedrane Cage

The Journal of Organic Chemistry, 2002
The activation barriers and energy profiles along the inclusion coordinate for the penetration of H+, He, Li+, Be+, Be2+, and Mg2+ into dodecahedrane 1 vary considerably with the nature of the projectile. Using Hartree-Fock and MP2 derived structures and energies, the overall process of creating endohedral X n+@1 complexes is examined in detail.
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Energetic salts from nitroformate ion

Journal of Molecular Modeling, 2015
Development of new energetic salts is the key factor in replacing low performance compounds in conventional formulations of high explosives as well as propellants. Ten salts based on the nitroformate anion and various nitrogen-rich cations were designed and their geometric optimizations carried out using the density functional method.
Pandurang M, Jadhav, S, Radhakrishnan, Vikas D, Ghule, Raj K, Pandey   +3 more
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Suppression of the tearing mode by energetic ions

Physical Review Letters, 1989
The effect of an energetic ion population on the nonlinear stability of a tearing mode of single helicity is determined using kinetic theory. A dynamical equation is derived for the magnetic-island width. It is shown that the island growth can be suppressed in a tokamak when the energetic ion-density profile peaks just outside the rational surface ...
, Hegna, , Bhattacharjee
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Bacterial sodium ion-coupled energetics

Antonie van Leeuwenhoek, 1994
For many bacteria Na+ bioenergetics is important as a link between exergonic and endergonic reactions in the membrane. This article focusses on two primary Na+ pumps in bacteria, the Na(+)-translocating oxaloacetate decarboxylase of Klebsiella pneumoniae and the Na(+)-translocating F1Fo ATPase of Propionigenium modestum.
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Irradiation Effects in Ices by Energetic Ions

1989
It has been shown that the irradiation of ices leads to “giant” erosion yields, in some specific conditions (1,2). In order to understand the physical processes involved, we have performed direct in-situ measurements of the erosion during irradiation, by means of infrared spectrometry of the ices.
Benit, J., Bibring, J.P., Rocard, F.
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RECOIL MIXING IN SOLIDS BY ENERGETIC ION BEAMS

Nuclear Instruments and Methods, 1980
Abstract Within the framework of the transport theoretical description of slowing down of energetic particles in random media, a general relation for recoil mixing is derived and evaluated. It takes into account accumulation of implanted projectiles and compensation of density variations by lattice relaxation.
Littmark, U., Hofer, W.
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Energetic ions in cosmic rays

Nuclear Physics B - Proceedings Supplements, 1995
Experimental data on energetic ions in cosmic rays: the anomalous component and heavy ions of the iron group are considered. The specific features of interactions of the anomalous component with the Earth's magnetosphere and the possibility to utilise these specific features for studies of the ionic component in cosmic rays are discussed.
J.H. Adams, R. Beaujean, N.L. Grigorov, M.I. Panasyuk, A.J. Tylka   +4 more
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Energetic ion behaviour in MAST

Plasma Physics and Controlled Fusion, 2014
Recent studies of fast ion transport resulting from a range of instabilities, including n = 1 internal kink modes (fishbones and long-lived modes), toroidal Alfven eigenmodes and sawteeth have been carried out at MAST. Strong correlations were found between relative changes in magnetic edge coils signals, edge D alpha signal a fast ion D alpha system ...
Cecconello, M, Jones, O M, Boeglin, W U, Perez, R V, Darrow, D S, Klimek, I, Sharapov, S E, Fitzgerald, M, McClements, K G, Keeling, D L, Allan, S Y, Michael, C A, Akers, R J, Conway, N J, Scannell, R, Turnyanskiy, M, Ericsson, G   +16 more
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Energetic ions in ITER plasmas

Physics of Plasmas, 2015
This paper discusses the behaviour and consequences of the expected populations of energetic ions in ITER plasmas. It begins with a careful analytic and numerical consideration of the stability of Alfvén Eigenmodes in the ITER 15 MA baseline scenario.
S. D. Pinches, I. T. Chapman, Ph. W. Lauber, H. J. C. Oliver, S. E. Sharapov, K. Shinohara, K. Tani   +6 more
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Cyclopropenyl Anion: An Energetically Nonaromatic Ion

The Journal of Organic Chemistry, 2013
A central idea in organic chemistry for the past 50 years is that cyclopropenyl anion is antiaromatic. A correlation between cycloalkene acidities and allylic bond angles reveals that energetically this is not case, cyclopropenyl anion is nonaromatic.
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