Results 121 to 130 of about 5,084,494 (418)
Yankuang ceshi, 2015 Potassium dichromate titration (othophenanthroline spectrophotometry) with ammonium chloride extraction is a reliable technique to determine the high-content iron carbonate (7.5%-80%) in samples. However, the traditional methods have the disadvantages of
WANG Na +5 more
doaj +1 more source
A Poisson model for earthquake frequency uncertainties in seismic hazard analysis [PDF]
, 2008 Frequency-magnitude distributions, and their associated uncertainties, are of key importance in statistical seismology. When fitting these distributions, the assumption of Gaussian residuals is invalid since event numbers are both discrete and of unequal variance.
arxiv +1 more source
Report of the State Geologist 1953-1954 [PDF]
, 1955 Report of the State Geologist 1953-1954. Maine Geological Survey - Maine Development Commission, Augusta, Maine - July 1955. Contents: Joseph M. Trefethen -- Review of Maine Mineral Outlook / Henry W.
Maine Geological Survey
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Maine Pegmatite Mines and Prospects and Associated Minerals [PDF]
, 1957 Maine Pegmatite Mines and Prospects and Associated Minerals Minerals Resources Index No.1 - Maine Geological Survey Department of Development of Industry and Commerce, Augusta, Maine (March 1, 1957). Contents: Introduction / Acknowledgments / Explanatory
Maine Geological Survey
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Yankuang ceshi, 2018 BACKGROUND The reductive environment of uranium is the most important influencing factor of uranium mineralization. The study of various redox markers in interlayer oxidation bands is of great significance for finding interlayer oxidation zone sandstone ...
ZHANG Li-juan +5 more
doaj +1 more source
The Geological Survey of Italy
Nature, 1881 MY friend Mr. W. Topley, in his interesting account of the Italian Geological Survey (NATURE, vol. xxv. p. 86), is quite right when he states that the geological surveyors seem now to have definitely fixed the position of the Carrara marbles in the Trias.
openaire +2 more sources
Significant Rises and Declines in Nebraska Groundwater Levels (from Pre-Development as of Fall 1985)/Registered Irrigation Wells in Nebraska (as of January 1, 1986) [PDF]
, 1987 Date de l'opération : 1991 (SU) Inventeur(s) : Jacques Alain L’opération lancée à l’angle de la rue du Cardinal et de la place Viviani [ (Fig. n°1 : Localisation des zones fouillées), site J] a révélé des indices concernant les origines de l’urbanisme et
Division, Conservation Survey +1 more
core +6 more sources
Yankuang ceshi, 2018 Acidolysis hydrocarbon is an important index with relatively high accuracy in the geochemical exploration for oil and gas and has been widely used.
LI Zhong-yu +5 more
doaj +1 more source