Kerogen in the Chattanooga shale
Irving A. Breger, A. Brown
1962, Science (137) 221-224
Study of its origin and composition suggests why these shales are not source beds for petroleum....
Spectrophotometric catalytic determination of small amounts of rhenium in mineralized rocks and molybdenite
F.O. Simon, F. S. Grimaldi
1962, Analytical Chemistry (34) 1361-1364
Rhenium is determined by spectrophotometry of the tellurium sol formed by the reduction of tellurate by stannous chloride under the catalytic influence of rhenium. A detailed investigation of the conditions for high sensitivity and stability at lowest concentration levels of rhenium is presented as well as the behavior of 26...
The detection of sulphur in contamination spots in electron probe X-ray microanalysis
I. Adler, E.J. Dwornik, H. J. Rose Jr.
1962, British Journal of Applied Physics (13) 245-246
Sulphur has been identified as one of the elements present in the contamination spot which forms under the electron beam in the microprobe. The presence of the sulphur results in a rapid change in intensity measurements causing a loss of observed intensity for elements other than sulphur. The source of...
Aromatic fluorine compounds. X. The 2,3- and 2,6-difluoropyridines
G. C. Finger, L. D. Starr, A. Roe, W. J. Link
1962, Journal of Organic Chemistry (27) 3965-3968
The preparation of difluoropyridines by the Schiemann reaction was investigated. 2-Amino-6-fluoropyridine (IIIa), necessary for the synthesis of 2,6-difluoropyridine (IVa) by the Schiemann reaction, was conveniently prepared by the Curtius degradation of 6-fluoropicolinic hydrazide (IIa) and by the Hofmann reaction on 6-fluoropicolinamide (IId). Since an α-fluorine on a pyridine nucleus is...
K/Na ratio of Cenozoic igneous rocks of the western United States
J.G. Moore
1962, Geochimica et Cosmochimica Acta (26) 101-130
The potassium and sodium content of chemically analysed Cenozoic igneous rocks from about 150 areas of the western United States has been examined. For each area a plot of the molecular proportion K2O(K2O + Na2O)">K2O(K2O + Na2O) [Niggli's k-value] is shown, and the projected k-value determined at 50...
Study of natural glasses through their behaviour as membrane electrodes
A.H. Truesdell
1962, Nature (194) 77-79
THE low-temperature chemical alteration of natural glass occurs in two stages: an initial stage in which it remains glassy but absorbs as much as 6 per cent water1, and a final stage in which devitrification to clay minerals, with release of silica, occurs2,3. During the first stage the composition of...
Oxygen adsorption and the magnetic susceptibility of ice at low temperatures
F. E. Senftle, A. Thorpe
1962, Nature (194) 673-674
WHEN dealing with the magnetic susceptibility of tumour tissue1, we reported the magnetic susceptibility of ice at various temperatures from 273° K. down to 77° K. Since this publication, the authors have made many susceptibility measurements of ice, using the same equipment, and have obtained similar results, that is, a...
Ground-water resources of Hamilton County, Nebraska, with a section on the chemical quality of the water
Charles Franklin Keech, P. G. Rosene
1962, Water Supply Paper 1539-N
No abstract available....
The occurrence of the longjaw cisco, Leucichthys alpenae, in Lake Erie
W. B. Scott, Stanford H. Smith
1962, Journal of the Fisheries Research Board of Canada (19) 1013-1023
The longjaw cisco, Leucichthys alpenae, is shown to be a species new to the Lake Erie fauna. The taxonomic work on Lake Erie ciscoes is reviewed. Thirty three specimens of L. alpenae taken in 1946, 1947 and 1957 are compared morphometrically with Leucichthys artedi of Lake Erie, the only other cisco species in the lake. L. alpenae has a...
The relative efficiency of nylon and cotton gill nets for taking lake trout in Lake Superior
Richard L. Pycha
1962, Journal of the Fisheries Research Board of Canada (19) 1085-1094
The change from cotton to nylon twine for gill nets in 1949–52 resulted in a sharp increase in the efficiency of the most important gear used for taking lake trout in Lake Superior, and, consequently, biased estimates of fishing intensity and abundance severely.From early May to the end of September...
Quantitative sampling with the orange-peel dredge
James W. Merna
1962, Limnology and Oceanography (7) 432-433
Abstract has not been submitted...
Ground water in the Hatton area, Traill and Steele Counties, North Dakota
D. G. Adolphson
1962, North Dakota Ground Water Studies 39
No abstract available....
Artesian water from glacial drift near Lehr, Logan and McIntosh Counties, North Dakota
D. G. Adolphson
1962, North Dakota Ground Water Studies 38
No abstract available....
An instance of upwelling along the east shore of Lake Michigan
James W. Moffett
1962, Conference Paper, Proceedings of the 5th Conference on Great Lakes Research
No abstract available....
Dissolved oxygen in Lake Erie, past and present
John F. Carr
1962, Conference Paper, Proceedings of the 5th Conference on Great Lakes Research
No abstract available....
Rivers
Luna Bergere Leopold
1962, American Scientist (50) 511-537
Rivers are both the means and the routes by which the products of continental weathering are carried to the oceans of the world. Except in the most arid areas more water falls as precipitation than is lost by evaporation and transpiration from the land surface to the atmosphere. Thus there...
Glaciological investigations on South Cascade Glacier
Wendell V. Tangborn
1962, The Mountaineer (55)
No abstract available....
Concentration method for the spectrochemical determination of seventeen minor elements in natural water
W. D. Silvey, R. Brennan
1962, Analytical Chemistry (34) 784-786
A method for the quantitative spectrochemical determination of microgram amounts of 17 minor elements in water is given. The chelating reagents 8-quinolinol, tannic acid, and thionalide are utilized to concentrate traces (1 to 500 μg.) of aluminum, cobalt, chromium, copper, iron, gallium, germanium, manganese, nickel, titanium, vanadium, bismuth, lead, molybdenum,...
Problem of the thermodynamic status of the mixed-layer minerals
E-An Zen
1962, Geochimica et Cosmochimica Acta (26) 1055-1067
Minerals that show mixed layering, particularly with the component layers in random sequence, pose problems because they may behave thermodynamically as single phases or as polyphase aggregates. Two operational criteria are proposed for their distinction. The first scheme requires two samples of mixed-layer material which differ only in the proportions...
Light penetration in the Great Lakes
Alfred M. Beeton
1962, Conference Paper, Proceedings of the 5th Conference on Great Lakes Research
No abstract available....
Freshwater fish diseases caused by bacteria belonging to the genera Aeromonas and Pseudomonas: Revised
S. F. Snieszko
1962, Fishery Leaflet 459
Use of mobile bioassay equipment in the chemical control of sea lamprey
John H. Howell, William M. Marquette
1962, Special Scientific Report - Fisheries 418
No abstract available....
Distribution and seasonal movements of Saginaw Bay fishes
Ira A. Carr
1962, Special Scientific Report - Fisheries 417
No abstract available....
Geology and ore deposits of the Globe-Miami district, Arizona
N. P. Peterson
1962, Professional Paper 342
The rocks of the Globe-Miami district range from lower Precambrian to Recent. The oldest formation, the Pinal schist, comprises several varieties of schist formed by dynamic and thermal metamorphism of shale and feldspathic sandstone during the early Precambrian Mazatzal revolution. During the later stages of this revolution, the schist was...
Estimation of the brook and sea lamprey ammocoete populations of three streams
Bernard R. Smith, Alberton L. McLain
1962, Technical Report 4
Marking experiments on three streams in the Upper Peninsula of Michigan yielded quantitative estimates of populations of larval and transforming lampreys. The estimates not only gave an idea as to the numbers of ammocetes in the streams, but also confirmed the judgments of abundance based on earlier surveys with electric-shocking...
