Results 231 to 240 of about 1,404,769 (279)

Intermediate ions in the atmosphere

Atmospheric Research, 2014
Abstract Intermediate air ions are charged nanometer-sized aerosol particles with an electric mobility of about 0.03–0.5 cm 2  V − 1  s − 1 and a diameter of about 1.5–7.5 nm. Intensive studies of new particle formation provided good knowledge about intermediate ions during burst events of atmospheric aerosol nucleation.
Hannes Tammet, Kaupo Komsaare, Urmas Hõrrak   +2 more
openaire   +1 more source

Reactions of Atmospheric Cluster Ions

1997
Abstract : A selected ion flow tube apparatus has been modified to include a well-defined flow drift region and instrumentation for ion modulation and data acquisition. This apparatus was used to measure the first experimental mobilities for several important families of atmospheric cluster ions. Core ions include the nitric oxide cation, ammonium ion,
Veronica M. Bierbaum, Stephen R. Leone
openaire   +1 more source

Polarization of the ion atmosphere of a charged cylinder

Biophysical Chemistry, 1981
The dipole moment is calculated for an electric-field-induced polarization of a Debye-Hückel ion atmosphere surrounding a charged rod. If L is the length of a thin rod. Q is its linear charge density, Z is charge of the salt ion in solution, and k is the Debye-Hückel shielding parameter, then for KL less, similar 10, the calculated polarizability is ...
D C, Rau, E, Charney
openaire   +2 more sources

Metal Ions in the Atmosphere of Neptune

Science, 1995
Microwave propagation experiments performed with Voyager 2 at Neptune revealed sharp layers of electrons in Neptune's lower ionosphere with densities of ∼10 4 per cubic centimeter. These layers are reminiscent of the sporadic-E layers in the Earth's ionosphere, and when taken together with data from the other giant ...
openaire   +3 more sources

Meteoric ion layers in the Martian atmosphere

Faraday Discussions, 2010
Low-lying plasma layers have been observed sporadically in the Martian atmosphere by radio occultation measurements from spacecraft such as the Mars Express Orbiter and the Mars Global Surveyor. These layers are just a few km wide, and tend to occur around 90 km. It has been proposed that the layers consist of metallic ions, for two reasons: they occur
Charlotte L, Whalley, John M C, Plane
openaire   +2 more sources

Ion Atmosphere around Nucleic Acid

The Journal of Physical Chemistry B, 2005
The poyion-ion preferential interaction coefficient Gamma describes the exclusion of coions and accumulations of counterions in the vicinity of a polyion in an aqueous solution. We give tight upper and lower bounds for Gamma when the polyion can be modeled by a cylinder of infinite length but of arbitrary charge density.
Clifford H, Taubes, Udayan, Mohanty, Steven, Chu   +2 more
openaire   +2 more sources

Ions and Electrical Currents in the Upper Atmosphere

Science, 1929
In a paper to be communicated to the American Physical Society it is assumed that the ionisation in the upper atmosphere is caused by the ultraviolet light of the Sun and that the ion‐ and electron‐densities at noon at the equator are those required by the theory of wireless wave‐propagation. From the laws of recombination of the ions and the diffusion
openaire   +2 more sources

Absorption of Infra-Red Radiation by Atmospheric Molecular Cluster-Ions

Journal of Atmospheric and Solar-Terrestrial Physics, 2005
Results from previous laboratory experiments indicate that both the protonated water dimer H3O+(H2O), and molecular cluster-ions, X+(H2O)n absorb infra-red (IR) radiation in the water vapour continuum region between 4 and 14μm (2500-714 cm-1). Protonated
Aplin, KL, Aplin KL, McPheat RA, McPheat, RA   +3 more
exaly   +2 more sources

Ion-ion recombination rates in the earth's atmosphere

Planetary and Space Science, 1977
Abstract The temperature dependence of the binary recombination coefficient, α2, for the reaction NO++NO2− → products has been obtained over the range 185–530 K. It is found that the corresponding mean cross section σ is described by the power law σ ≅ A · T −0.9 , and that α2 ≅ B · T−0.4.
D. Smith, M.J. Church
openaire   +1 more source

The balance of ions in the atmosphere; the production and the disappearance of ions

Physica, 1951
Abstract It is argued that striking balance of ions in atmosphere is not feasible by establishing number of ions present and balancing it against number of ions produced and disappeared, first mentioned number depending entirely on mobility limit in measurements.
J Clay, H van Marle
openaire   +1 more source