Results 261 to 270 of about 166,601 (310)

Electron Microscopy of Insulin Precipitates

Diabetes Care, 1982
Morphologic characteristics of insulin precipitates were examined by both scanning and transmission electron microscopy. Insulin precipitate obtained after 1 wk of in vivo storage in an implanted dog reservoir was compared with insulin precipitate produced in vitro by isoelectric precipitation, acid-freeze-heat precipitation, and motion-induced ...
D S, Schade, R P, Eaton, J, DeLongo, L C, Saland, A J, Ladman, G A, Carlson   +5 more
openaire   +2 more sources

Precipitation of relativistic electrons

AIP Conference Proceedings, 2012
Precipitation of relativistic electrons observed in Earth’s auroral zone occurs on the morning and evening local hours. The morning precipitation is impulsive with durations of about 0.25s (microbursts). The evening precipitation is relatively smooth with variations on minute time scales.
G. K. Parks, J. J. Lee, E. S. Lee, J. Sample, M. McCarthy   +4 more
openaire   +1 more source

Observations of low‐latitude electron precipitation

Journal of Geophysical Research: Space Physics, 1988
Low‐latitude electron precipitation outside the well‐known region of the trapped Van Allen radiation belt has been known for some time, as has the occurrence of equatorial aurora. Observation by the Spacelab 1 electron spectrometer, working between 0.1 and 12.5 keV electron energy has revealed an unexpectedly high occurrence rate and flux intensity for
Lieu, R., Watermann, J., Wilhelm, K., Quenby, J., Axford, W.   +4 more
openaire   +2 more sources

Precipitation of accelerated electrons at Mars

2023
Accelerated electron populations observed in the nightside ionosphere of Mars are investigated using measurements obtained by MAVEN’s Solar Wind Electron Analyzer. The measurements are of particular interest as they extend to altitudes as low as 130 km and to regions characterized by strong crustal magnetic fields, allowing us to investigate ...
Hassanali Akbari, Christopher Fowler, Laila Andersson   +2 more
openaire   +1 more source

Outer-zone electron precipitation

Journal of Geophysical Research, 1971
Measurements of energetic electrons (300 kev to 2.3 Mev) within the drift loss cone, of ELF emissions, and of the plasmapause location obtained with instruments aboard the polar satellite OV3-3 (1966-70A) are compared. A knee is found in the L-shell profile of the precipitated fluxes of outer-zone electrons, the flux decreasing toward lower latitudes ...
A. L. Vampola, H. C. Koons, D. A. McPherson   +2 more
openaire   +1 more source

Statistical study of precipitating electrons

Journal of Geophysical Research: Space Physics, 1982
Energy spectra of precipitating electrons are fitted to the sum of three distributions: a power law, a Maxwellian, and a Gaussian. This fitting procedure determines seven parameters that characterize the essential features of each spectrum. These characteristic parameters are used to carry out various studies involving precipitating electrons.
E. G. Fontheim, K. Stasiewicz, M. O. Chandler, R. S. B. Ong, E. Gombosi, R. A. Hoffman   +5 more
openaire   +1 more source

Lightning-induced electron precipitation

Nature, 1984
The broadband very low frequency (VLF, 0.3–30 kHz) radiation from lightning propagates in the Earth–ionosphere cavity as impulsive signals (spherics) and in the dispersive plasma regions of the ionosphere and magnetosphere it propagates as tones of descending or rising frequency (whistlers)1.
Voss, H. D., Imhof, W. L., Walt, M., Mobilia, J., Gaines, E. E., Reagan, J. B., Inan, U. S., Helliwell, R. A., Carpenter, D. L., Katsufrakis, J. P., Chang, Hung-Chun   +10 more
openaire   +1 more source

Atmospheric ionization by precipitated electrons

Journal of Atmospheric and Terrestrial Physics, 1974
Abstract A relatively simple procedure for the calculation of ionization production rate profiles due to precipitated electrons is described. It is used to show that the exospheric temperature can have an important effect on the production rates in the F-region and that the magnetic dip angle must be taken into account when calculating the profiles ...
Annemarie Wulff, J.A Gledhill
openaire   +1 more source

Positron-electron ratio of precipitating electrons

Journal of Geophysical Research, 1964
A balloon observation of the X-ray spectrum from 37 to 700 kev over Minneapolis during the July 1961 solar event series has allowed an upper limit to be placed on the ratio of positrons to electrons during a precipitation as well as on other geophysical processes.
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Precipitation of energetic electrons into the atmosphere

Journal of Geophysical Research, 1964
Measurements were made of electron fluxes and spectrums above 900 kev at altitudes between 200 and 700 km in early September and October 1962 aboard two near-polar Air Force satellites. The particle fluxes were observed with shielded solid-state detectors having a 2π solid angle.
George A. Paulikas, Stanley C. Freden
openaire   +1 more source