Phase relations at atmospheric pressure in the pseudobinary join KA1Si206 (Lc)NaA1Si3Os(Ab) and in the pseudoternary join Lc-Ab-CaA12Si2Os(An) indicate that leucite is incompatible with Na-feldspar. In the former join leucite can exist with an alkali feldspar of maximum albite content Ab54. In the Lc-Ab--An join, leucite only coexists with ternary feldspars with high An contents (approximately ...

[1] Glacial sedimentary sequences in the north central United States record multiple advances of the Laurentide Ice Sheet (LIS) since 2 Ma. Although the tills found in these sequences were deposited by southward flowing glacial lobes, little information is available on the geometry of flow lines in the interior of the LIS during any one glaciation, and the provenance of glacial deposits older t...

TORRETTI, JORGE, ERNESTO HENDLER, EDWARD WEINSTEIN, ROBERT E. LONGNECKER, AND FRANKLIN H. EPSTEIN. Functional sign@ance of NaK-A Vase in the kidney: e$ect.s of ouabain inhibition. Am. J. Physiol. 222(6): 1398-1405. 1972.-Infusions of ouabain directly into the renal artery of the dog produced substantial inhibition of renal Na-K-ATPase activity, which was almost complete in some experiments. The...

Disturbances of Na,K-ATPase activity are implicated in the pathophysiology of cerebral ischemia. Previous experiments have shown that EGb 761 protects NaK-ATPase activity against one hour of cerebral ischemia. In the brain however, the 3 isoenzymes responsible for Na,K-ATPase activity may be differentially affected by various times of ischemia. In the present study, we investigated the effect o...