## Polar cap patches are regions of enhanced ionization that appear when the interplanetary magnetic field is southward. They are created either in or near the cusp and then convect in an antisunward direction across the dark polar cap at speeds of from 100 m/s to about 2 km/s. The size of these p
β¦ LIBER β¦
The thermospheric effects of a rapid polar cap expansion
β Scribed by D. W. Idenden
- Publisher
- Copernicus Group
- Year
- 1998
- Tongue
- English
- Weight
- 957 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0992-7689
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## Abstract The p__K__ values for nine acyclic, monoβ and bicyclic Ξ±β, Ξ²β and Ξ³β(trimethyl)ammonio acids, **1(Ξ±βΞ³), 2(Ξ±βΞ³)** and **3(Ξ±βΞ³)**, respectively, have been measured in 50% aqueous ethanol. The comparison of these values with those for the nine homomorphous Ξ±β, Ξ²β and Ξ³βacids, **4(Ξ±βΞ³), 5(Ξ±