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Riometry as an Aid to Ionospheric Forecasting.
The Preparation ofd-Pseudococaine froml-Cocaine
d-Pseudococaine, a diastereoisomer of cocaine, is prepared from l-cocaine by the action of strong base that epimerizes the carbomethoxy group at C-2 to the equatorial position and transesterifies theExpand
Thule Riometer Observations of Polar Cap Absorption Events (1962-1972)
Abstract : Polar Cap Absorption (PCA) events have been observed at Thule, Greenland, using a ground-based riometer for the past decade. The riometer was operated at a fixed frequency of 30 MHz, andExpand
Foreign Languages and the Liberal Arts.
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