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  • 1
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    Food colors and behavior (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brunner, R L -- Vorhees, C V -- Butcher, R E -- New York, N.Y. -- Science. 1981 May 1;212(4494):578-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209556" target="_blank"〉PubMed〈/a〉
    Keywords: Behavior/*drug effects ; Child ; Child, Preschool ; Food Coloring Agents/*adverse effects ; Humans ; Research Design
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Psychotropic drugs as behavioral teratogens (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-09-21
    Description: Three psychotropic drugs were administered to pregnant rats and were then evaluated for their behavioral and reproductive effects in the offspring. Control rats received either saline or vitamin A. Prochlorperazine had the most disruptive effects on reproduction and growth, but had the least effect on behavior. Propoxyphene had no apparent effects on reproduction or growth, but produced a variety of behavioral changes. Fenfluramine was intermediate in its effects on reproduction and growth and had behavioral effects that were revealed in tests of preweaning development. The data suggest that systematic tests of behavior add important information to evaluations of reproductive toxicity that cannot, at present, be obtained by other means.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vorhees, C V -- Brunner, R L -- Butcher, R E -- New York, N.Y. -- Science. 1979 Sep 21;205(4412):1220-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472738" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/*drug effects ; Brain Chemistry/drug effects ; Dextropropoxyphene/*pharmacology ; *Disease Models, Animal ; Female ; Fenfluramine/*pharmacology ; Humans ; Litter Size/drug effects ; Male ; Movement Disorders/chemically induced ; Pregnancy ; Pregnancy, Animal/*drug effects ; Prochlorperazine/*pharmacology ; Rats ; Reproduction/drug effects ; Sex Ratio/drug effects ; Swimming
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Demonstrating the saturation of stimulated Brillouin scattering by ion acoustic decay using fully kinetic simulations (2015)
    American Institute of Physics (AIP)
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    Publication Date: 2015-09-17
    Description: The saturation of stimulated Brillouin scattering (SBS) by the decay to turbulence of the ion acoustic wave (IAW) that participates in the three-wave SBS interaction is demonstrated using a quasi-noiseless one-dimensional numerical solution to the Vlasov-Maxwell system of equations. This simulation technique permits careful examination of the decay process and its role in the complex evolution of SBS. The IAW decay process is shown to be an effective SBS saturation mechanism. In our example, the instantaneous plasma reflectivity saturates at ∼ 30 % and drops to ∼ 0 % as a direct consequence of IAW decay. A contrasting example where the reflectivity is controlled by dephasing due to the nonlinear frequency of the IAW is also discussed.
    Print ISSN: 1070-664X
    Electronic ISSN: 1089-7674
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 4
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    Kinetic simulations and reduced modeling of longitudinal sideband instabilities in non-linear electron plasma waves (2014)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2014-10-10
    Description: Kinetic Vlasov simulations of one-dimensional finite amplitude Electron Plasma Waves are performed in a multi-wavelength long system. A systematic study of the most unstable linear sideband mode, in particular its growth rate γ and quasi- wavenumber δk , is carried out by scanning the amplitude and wavenumber of the initial wave. Simulation results are successfully compared against numerical and analytical solutions to the reduced model by Kruer et al . [Phys. Rev. Lett. 23 , 838 (1969)] for the Trapped Particle Instability (TPI). A model recently suggested by Dodin et al . [Phys. Rev. Lett. 110 , 215006 (2013)], which in addition to the TPI accounts for the so-called Negative Mass Instability because of a more detailed representation of the trapped particle dynamics, is also studied and compared with simulations.
    Print ISSN: 1070-664X
    Electronic ISSN: 1089-7674
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 5
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    Kinetic simulations and reduced modeling of longitudinal sideband instabilities in non-linear electron plasma waves (2014)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2014-10-08
    Description: Kinetic Vlasov simulations of one-dimensional finite amplitude Electron Plasma Waves are performed in a multi-wavelength long system. A systematic study of the most unstable linear sideband mode, in particular its growth rate γ and quasi- wavenumber δk , is carried out by scanning the amplitude and wavenumber of the initial wave. Simulation results are successfully compared against numerical and analytical solutions to the reduced model by Kruer et al . [Phys. Rev. Lett. 23 , 838 (1969)] for the Trapped Particle Instability (TPI). A model recently suggested by Dodin et al . [Phys. Rev. Lett. 110 , 215006 (2013)], which in addition to the TPI accounts for the so-called Negative Mass Instability because of a more detailed representation of the trapped particle dynamics, is also studied and compared with simulations.
    Print ISSN: 1070-664X
    Electronic ISSN: 1089-7674
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 6
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    Vlasov simulations of electron-ion collision effects on damping of electron plasma waves (2016)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2016-03-10
    Description: Collisional effects can play an essential role in the dynamics of plasma waves by setting a minimum damping rate and by interfering with wave-particle resonances. Kinetic simulations of the effects of electron-ion pitch angle scattering on Electron Plasma Waves (EPWs) are presented here. In particular, the effects of such collisions on the frequency and damping of small-amplitude EPWs for a range of collision rates and wave phase velocities are computed and compared with theory. Both the Vlasov simulations and linear kinetic theory find the direct contribution of electron-ion collisions to wave damping significantly reduced from that obtained through linearized fluid theory. To our knowledge, this simple result has not been published before. Simulations have been carried out using a grid-based (Vlasov) approach, based on a high-order conservative finite difference method for discretizing the Fokker-Planck equation describing the evolution of the electron distribution function. Details of the implementation of the collision operator within this framework are presented. Such a grid-based approach, which is not subject to numerical noise, is of particular interest for the accurate measurements of the wave damping rates.
    Print ISSN: 1070-664X
    Electronic ISSN: 1089-7674
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 7
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    Collisional damping rates for electron plasma waves reassessed (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-10-14
    Description: Author(s): J. W. Banks, S. Brunner, R. L. Berger, W. J. Arrighi, and T. M. Tran Collisional damping of electron plasma waves, the primary damping for high phase velocity waves, is proportional to the electron-ion collision rate, ν ei , th . Here, it is shown that the damping rate normalized to ν ei , th depends on the charge state, Z , on the magnitude of ν ei , th and the wave number k i... [Phys. Rev. E 96, 043208] Published Fri Oct 13, 2017
    Keywords: Plasma Physics
    Print ISSN: 1539-3755
    Electronic ISSN: 1550-2376
    Topics: Physics
    Published by American Physical Society (APS)
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  • 8
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    Narrow absorption line variability in repeat quasar observations from the Sloan Digital Sky Survey (2013)
    Oxford University Press
    Details
    Publication Date: 2013-08-08
    Description: We present the results from a time domain study of absorption lines detected in quasar spectra with repeat observations from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7). Beginning with over 4500 unique time separation baselines of various absorption line species identified in the SDSS DR7 quasar spectra, we create a catalogue of 2522 quasar absorption line systems with two to eight repeat observations, representing the largest collection of unbiased and homogeneous multi-epoch absorption systems ever published. To investigate these systems for time variability of narrow absorption lines, we refine this sample based on the reliability of the system detection, the proximity of pixels with bright sky contamination to individual absorption lines and the quality of the continuum fit. Variability measurements of this sub-sample based on the absorption line equivalent widths yield a total of 33 systems with indications of significantly variable absorption strengths on time-scales ranging from one day to several years in the rest frame of the absorption system. Of these, at least 10 are from a class known as intervening absorption systems caused by foreground galaxies along the line of sight to the background quasar. This is the first evidence of possible absorption line variability detected in intervening systems, and their short time-scale variations suggest that small-scale structures (~10–100 au) are likely to exist in their host foreground galaxies.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
    Published by Oxford University Press
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