THE extreme sensitivity of measurements of radioisotopes makes it possible to use the artificial radioelements as an aid in analytical chemistry. In our experiments we have used radioactive silver for ...
TRANSITIONS occur in the chromium–manganese sigma phase at 1,005° C. and in the nickel–vanadium sigma phase [see Nature, January 12, 1952, p. 70] at a temperature below 800° C. In both these systems ...
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