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Page 6937, results 173401 - 173425

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Publication Extents

Not all publications have extents, not all extents are completely accurate
The oxidation of 2,6-di-tert-butyl-4-methylphenol
G. R. Yohe, J. E. Dunbar, R. L. Pedrotti, F. M. Scheidt, F. G. H. Lee, E. C. Smith
1956, Journal of Organic Chemistry (21) 1289-1292
The products formed in the oxidation of 2,6-di-tert-butyl-4-methylphenol with oxygen and sodium hydroxide at about 100° are 3,5-di-tert-butyl-4-hydroxybenzaldehyde, trimethylacetic acid, an acidic compound C14H22O3, and probably 2,6-di-tert-butylbenzoquinone (which was actually isolated in the similar oxidation of the above-named benzaldehyde), in addition to compounds previously reported. Some of the properties of...
Preliminary report on the geology and deposits of monazite, thorite, and niobium-bearing rutile of the Mineral Hill district, Lemhi County, Idaho
Edward Peck Kaiser
1956, Open-File Report 56-69
Deposits of minerals containing niobium (columbium), thorium, and rare earths occur in the Mineral Hill district, 30 miles northwest of Salmon, Lemhi County, Idaho. Monazite, thorite, allanite, and niobium-bearing rutile form deposits in metamorphic limestone layers less than 8 feet thick. The known deposits are small, irregular, and typically located...
Aromatic fluorine compounds. VI. Displacement of aryl fluorine in diazonium salts
G. C. Finger, R.E. Oesterling
1956, Journal of the American Chemical Society (78) 2593-2596
Several chlorofluorobenzenes have been isolated from the Schiemann synthesis of fluorobenzenes. These have been shown to be the products of two side reactions occurring during thermal decomposition of the dry benzenediazonium fluoborate salt containing coprecipitated sodium chloride, an unavoidable contaminant in large preparations involving the use of hydrochloric acid and...
Thoron-tartaric acid systems for spectrophotometric determination of thorium
F. S. Grimaldi, Mary H. Fletcher
1956, Analytical Chemistry (28) 812-816
Thoron is commonly used for the spectrophotometric determination of thorium. An undesirable feature of its use is its high sensitivity to zirconium. This study describes the use of tartaric acid as a masking reagent for zirconium. Three tartaric acid-thoron systems, developed for the determination of thorium, differ with respect to...
Spectrophotometric study of the thorium-morin mixed-color system
M. H. Fletcher, R.G. Milkey
1956, Analytical Chemistry (28) 1402-1407
A spectrophotometric study was made of the thoriummorin reaction to evaluate the suitability of morin as a reagent for the determination of trace amounts of thorium. At pH 2, the equilibrium constant for the reaction is 1 x 106, and a single complex having a thorium-morin ratio of 1 to...
Data and understanding
Luna Bergere Leopold
Gilbert F. White, editor(s)
1956, Conference Paper, The future of arid lands: Papers and recommendations from the International Arid Lands Meetings
In the year 1534 when Cabeza de Vaca escaped from the aborigines of southern Texas by whom he had been enslaved for six years, he made his way on foot from the vicinity of Galveston to the west coast of Mexico. Although his Relación was not printed until 1542, the...
Aromatic fluorine compounds. VII. Replacement of aromatic -Cl and -NO2 groups by -F
G. C. Finger, C.W. Kruse
1956, Journal of the American Chemical Society (78) 6034-6037
Replacement of -Cl by -F in aryl chlorides with potassium fluoride has been extended from 2,4-dinitrochlorobenzene to less activated halides by the use of non-aqueous solvents, especially dimethylformamide (DMF) and dimethyl sulfoxide (DMSO). Also replacement of -NO2 by -F in substituted nitrobenzenes was studied in DMF. As a direct result...
Life history of lake herring of Green Bay, Lake Michigan
Stanford H. Smith
1956, Fishery Bulletin (109) 87-138
Although the lake herring has been an important contributor to the commercial fish production of Green Bay, little has been known about it. This study is based on field observations and data from about 6,500 lake herring collected over the period 1948 to 1952. Relatively nonselective commercial pound nets...
Floods in relation to the river channel
Luna Bergere Leopold, M. Gordon Wolman
1956, Proceedings of the International Association of Hydrological Sciences 85-98
Among the rivers studied by us two broad types may be distinguished. Channels in the semi-arid areas scour at high discharges so that the bed lowers nearly as much as the water surface rises. Detailed data on the middle reaches of the Rio Grande in New Mexico during the spring...
Land use and sediment yield
Luna Bergere Leopold
William L. Thomas Jr., editor(s)
1956, Conference Paper, Man’s role in changing the face of the Earth
When the vegetal cover is removed from a land surface, the rate of removal of the soil material, at least initially, increases rapidly. So well known is this principle that it hardly needs restatement.If attention is focused on any individual drainage basin in its natural state, large or small, and...