Results 261 to 270 of about 89,033 (293)

Flavonoids and genomic instability induced by ionizing radiation

Drug Discovery Today, 2010
DNA is the cellular target that has the most damage induced by ionizing radiation (IR). If genomic instability resulting from this DNA damage is not correctly repaired, it leads to mutation, cancer and cell death. Flavonoids are a family of natural products that affect oxidative stress and enhance genomic stability through DNA interaction.
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Attachment instability in an externally ionized discharge

Journal of Applied Physics, 1974
A new type of plasma instability is described in an electron-beam ionized discharge. This instability occurs in the form of current oscillations in gas mixtures in which the dissociative attachment rate increases strongly with electric field. It has been observed experimentally in He : H2O 74 : 2 and in He : CO2 1 : 1 and 9 : 1 mixtures.
D. H. Douglas-Hamilton, S. A. Mani
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Ionization Instability of Magnetized Dusty Gases

Physica Scripta, 1998
The ionization instability of a magnetized dusty plasma in which the neutral gas is ionized by a constant influx of energetic electrons is investigated. We have employed a multi-fluid dusty plasma model to derive dispersion relations for electrostatic dusty plasma waves in the presence of various drags (viz.
P. K. Shukla, M. R. Amin, G. Morfill
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Interchange instabilities in a partially ionized plasma

Physics of Plasmas, 1998
In a partially ionized plasma, the charged particle population is coupled to the neutrals through charge exchange, ionization and recombination. An interchange instability is identified in which the driving factor is the neutral pressure gradient and the dominant collisional process is charge exchange. Regimes are considered in which the mean free path
W. Daughton, Peter J. Catto, B. Coppi, S. I. Krasheninnikov   +3 more
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Wave Instabilities in Partly Ionized Gases

The Physics of Fluids, 1970
A collisional theory of longitudinal wave propagation in partly ionized, multitemperature gases is formulated from a coupled set of Maxwell and Boltzmann equations. Equations of motion for the three plasma constituents (electrons, ions, and neutrals) are developed by expanding the particle distribution functions in series of Hermite polynomials about ...
Stephen Morin, David Kahn
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Instability of a gravitating partially-ionized plasma

Astrophysics and Space Science, 1992
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ali, Ahsan, Bhatia, P. K.
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On the numerical simulation of ionization instability

Physics Letters A, 1969
Abstract The possibility of numerical simulation of ionization instability is discussed. A perturbation technique is described which leads to results that agree well with experimental observations.
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Effects of ionization on the collisional streaming instability

Physics of Plasmas, 2005
The influence of inelastic collisions on the collisional streaming instability is studied. The dispersion equation of the system is derived in the regime of strongly magnetized electrons and magnetized ions. The linear stability of the system is investigated. The numerical results are applied to a laboratory argon plasma.
D. Petrović, J. Vranjes, S. Poedts
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Acoustic Instability in Weakly Ionized Gases

Physical Review, 1969
It is shown, in contrast with earlier work, that energy transfer between hot electrons and neutrals in a weakly ionized gas does not lead to an acoustic instability, if proper care is taken to account for the nonstationary nature of the neutral equilibrium.
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Some instabilities of a completely ionized plasma

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1954
Abstract Two cases of equilibrium for a highly conducting plasma are investigated for their stability. In the first case, a plasma is supported against gravity by the pressure of a horizontal magnetic field. This equilibrium is found unstable, in close correspondence to the classical case of a heavy fluid supported by a light one. The
Kruskal, M., Schwarzschild, M.
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