Results 261 to 270 of about 9,228,850 (295)

Potential carcinogenicity of some transition metal ions

Biological Trace Element Research, 1999
Potential carcinogenicity of some transition metal ions was tested using a direct-current polarography method. The measurements were based on the reduction of tested compounds in an anhydrous solution using alpha-lipoic acid as the detection compound.
I, Dovinová, A, Vachálková, L, Novotný   +2 more
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Effective Potential and Phase Transitions

2020
We study the one loop effective potentials in field theory at zero and finite temperatures. The evolution of the Higgs potential at finite temperature shows that the electroweak symmetry breaking was not a first order phase transition which implies that any existing baryon asymmetry which was present in the universe was washed out by sphalerons in the ...
openaire   +1 more source

The Democratic Potential in the Transition of Postmodernism

American Behavioral Scientist, 1997
Postmodernism is more than a school of thought or merely a critique of modernism. It is rather a period of transition that marks an evolutionary trend in the development of human culture and in the development of democratic government. As such, postmodernism warrants more than reform; it calls for the conscious engagement of its potential. Further, the
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Potential Energy Surfaces and Rates of Spin Transitions

Zeitschrift für Physikalische Chemie, 2013
The stability of magnetic states and the mechanism for magnetic transitions can be analyzed in terms of the shape of the energy surface, which gives the energy as a function of the angles determining the orientation of the magnetic moments. Minima on the energy surface correspond to stable or metastable magnetic states and can represent parallel ...
Bessarab, Pavel F., Uzdin, Valery M., Jónsson, Hannes   +3 more
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Increasing the potential of special libraries in countries in transition

Aslib Proceedings, 1998
The paper describes the efforts made in recent years to promote the concepts of information management, information policy and information strategy in order to help special libraries and information and documentation services in countries in transition in reinforcing their missions and roles.
Zdravka Pejova, Alenka Kavcic-Colic
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Interaction Potentials and Transition Probabilities

1982
Calculation of the angular differential cross section (for comparison with experiment or for use when experimental data are not available) requires a description of the interaction between the two colliding particles. This endeavor has kept physicists and chemists busy since the beginning of the century, the description being complicated by the fact ...
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Mitochondrial Membrane Potential and the Permeability Transition in Excitotoxicity

Annals of the New York Academy of Sciences, 1999
ABSTRACT: Acute neuronal injury caused by activation of glutamate receptors in neurons, or excitotoxicity, can be triggered by the activation of N‐methyl‐D‐aspartate receptors and the entry of large amounts of Ca2+. Recent studies have suggested that mitochondria have a critical role in the excitotoxicity injury mechanism.
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Transition to anomalous relaxation: Localization in a hierarchical potential

Physical Review Letters, 1988
A model of classical relaxation in a one-dimensional potential with a hierarchical distribution of barriers is studied. The vanishing of an effective diffusion constant results in a transition of the low-lying states of the master equation from extended to localized, producing a transition from exponential to anomalous decay.
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First-Principles Interatomic Potentials in Transition Metals

Physical Review Letters, 1985
The first ab initio theory of structure-independent interatomic potentials in $d$-electron transition metals has been developed from a multi-ion expansion of the total energy within the density-functional formalism. Explicit results for the volume term and two-ion and three-ion potentials entering this expansion have been obtained and successfully ...
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Influences on transit ridership and transit accessibility in US urban areas

Transportation Research, Part A: Policy and Practice, 2021
Louis Merlin, Jonathan Levine
exaly