Bottom sediments and nutrients in the tidal Potomac system, Maryland and Virginia
Jerry L. Glenn
1988, Water Supply Paper 2234-F
The characteristics and distributions of near-surface bottom sediments and of nutrients in the sediments provide information on modern sediment and nutrient sources, sedimentation environments, and geochemical reactions in the tidal Potomac system, Maryland and Virginia. This information is fundamental to an improved understanding of sedimentation and eutrophication problems in the...
Lead residues in eastern tent caterpillars (Malacosoma americanum) and their host plant (Prunus serotina) close to a major highway
W. N. Beyer, John Moore
1980, Environmental Entomology (9) 10-12
Eastern tent caterpillars, Malacosoma americanum (F.) (Lepidoptera: Lasiocampidae), and leaves of their host plant, black cherry, Prunus serotina Ehrh., were collected in May, 1978, at various distances from the Baltimore-Washington Parkway, Prince George's Co., MD, and were analyzed for lead by atomic absorption spectrophotometry. Caterpillars collected within 10 m of the parkway contained 7.1–7.4...
Uranium and organic matters: use of pyrolysis-gas chromatography, carbon, hydrogen, and uranium contents to characterize the organic matter from sandstone-type deposits
Joel S. Leventhal
1979, Open-File Report 79-942
Organic matter seems to play an important role in the genesis of uranium deposits in sandstones in the western United States. Organic materials associated with ore from the Texas coastal plain, Tertiary basins of Wyoming, Grants mineral belt of New Mexico, and the Uravan mineral belt of Utah and Colorado...
Rapid analysis of silicate, carbonate, and phosphate rocks: Revised edition
Leonard Shapiro
1975, Bulletin 1401
The rapid methods previously used by the U.S. Geological Survey to determine the major constituents of rocks have been modified to introduce atomic absorption spectrometry (AAS) where applicable. Two procedures are available for determining 10 constituents: one, from a single solution prepared by a nitric-acid dissolution of a lithium metaborate-lithium...
Technique for the extraction and partial chemical analysis of fluid-filled inclusions from minerals
Edwin Roedder
1958, Economic Geology (53) 235-269
A method has been developed for the extraction and limited chemical analysis of the materials in solution in the fluid from the very minute fluid-filled inclusions such as commonly occur in whitish or milky quartz. The method may also be applied, with some reservations, to a variety of other minerals....
Biogeochemistry of the rare-earth elements with particular reference to hickory trees
W. O. Robinson, H. Bastron, K. J. Murata
1958, Geochimica et Cosmochimica Acta (14) 55-67
Hickory trees concentrate the rare-earth elements in their leaves to a phenomenal degree and may contain as much as 2300 p.p.m. of total rare earths based on the dry weight of the leaves. The average proportions of the individual elements (atomic percent of the total rare-earth elements) in the leaves...
The evolution and disintegration of matter
Frank Wigglesworth Clarke
1925, Professional Paper 132-D
In any attempt to study the evolution of matter it is necessary to begin with its simplest known forms, the so-called chemical elements. During a great part of the nineteenth century many philosophical chemists held a vague belief that these elements were not distinct entities but manifestations of one primal...
Atomic numbers versus atomic weights
F. W. Clarke
1924, Science (59) 27-30
No abstract available....
Fifteenth annual report of the committee on atomic weights. Determinations published during 1907
F. W. Clarke
1908, Journal of the American Chemical Society (30) 309-318
[No abstract available]...
