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Page 7082, results 177026 - 177050

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Not all publications have extents, not all extents are completely accurate
Aromatic fluorine compounds. IV. 1,2,3,5-Tetrafluorobenzene
G. C. Finger, F.H. Reed, R.E. Oesterling
1951, Journal of the American Chemical Society (73) 152-153
The preparation of 1,2,3,5-tetrafluorobenzene and some of its intermediates is described. Cuprous oxide as a catalyst was used to advantage in the hypophosphorous acid deamination method....
Fluorometric determination of zirconium in minerals
W.C. Alford, L. Shapiro, C. E. White
1951, Analytical Chemistry (23) 1149-1152
The increasing use of zirconium in alloys and in the ceramics industry has created renewed interest in methods for its determination. It is a common constituent of many minerals, but is usually present in very small amounts. Published methods tend to be tedious, time-consuming, and uncertain as to accuracy. A...
An aquarium experiment on the American eel as a predator on larval lampreys
Alfred Perlmutter
1951, Copeia (1951) 173-174
The parasitic sea lamprey, Petromyzon marinus, has in recent years spread throughout Lakes Huron and Michigan and is now firmly established in these waters (Applegate, 1949, Mich. Cons., 18 (4): 13-15). Coincident with their spread, the abundance of lake trout, Salvelinus namaycush, has declined...
The quantitative determination of calcite associated with the carbonate-bearing apatites
Sol R. Silverman, Ruth K. Fuyat, Jeanne D. Weiser
1951, Trace Elements Investigations 118
The CO2 combined as calcite in carbonate-bearing apatites as been distinguished from that combined as carbonate-apatite, or present in some form other than calcite, by use of X-ray powder patterns, differential thermal analyses, and differential solubility tests. These methods were applied to several pure apatite minerals, to one fossil bone,...
A state‐wide program of periodic measurements of ground‐water level In Nebraska
L.K. Wenzel
1951, Eos, Transactions, American Geophysical Union (16) 495-498
The precipitation in Nebraska has been considerably less than normal in the last four years, and in consequence the ground‐water level in many parts of the State has declined to a marked extent. Moreover, in some parts of Nebraska the ground‐water level has declined as the result of land‐drainage, and in other parts it has risen as the result of irrigation with water diverted from streams. These changes in ground‐water level produced by drainage, irrigation, and decreased precipitation have caused...
Ground water in the Escalante Valley, Beaver, Iron, and Washington Counties, Utah
Philip F. Fix, W.B. Nelson, B. E. Lofgren, R.G. Butler
1950, Technical Publication 6
Escalante Valley in southwestern Utah is one of the largest and most important ground-water areas of the State, with 1,300 square miles of arid land and an additional 1,500 square miles in its tributary drainage basin. Ground water is obtained from gravel and sand beds in the unconsolidated valley fill....