Virus Occurrence and Transport in a School Septic System and Unconfined Aquifer   总被引：5，自引：0，他引：5  

Dan C. DeBorde  William W. Woessner  Bruce Lauerman  Patrick N. Ball 《Ground water》1998,36(5):825-834

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Baseline levels of benzo(a)pyrene in southern California mussels     

Bruce P. Dunn  David R. Young   《Marine pollution bulletin》1976,7(12):231-234

Marine mussels accumulate the carcinogen benzo(a)pyrene from contaminated environments. Baseline studies in California indicate that levels of the carcinogen in mussels are at or near zero, except in areas of human activity. This finding runs counter to previous suggestions that benzo(a)pyrene is widely distributed in marine organisms.  相似文献   

Earthquake Prediction,Developments in Solid Earth Geophysics, 9: Tsuneji Rikitake. Elsevier Scientific Publishing Co., Amsterdam-Oxford-New York,N.Y., 1976, 357 pp., 138 illus., 24 tables,Dfl. 95.00/US $39.75     

Bruce A. Bolt 《Physics of the Earth and Planetary Interiors》1976,12(1):87-89

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An inverse method for earthquake source mechanisms     

Bruce R. Julian 《Tectonophysics》1978,49(3-4)

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Direct counts of bacteria in the sediments of a North Carolina salt marsh     

Parke Rublee  Bruce E. Dornseif 《Estuaries and Coasts》1978,1(3):188-191

The number of bacteria in sediments of a North Carolina salt marsh was determined by direct counts with epifluorescent illumination and acridine orange stain. Cell number decreased from 8.36–10.90×10⁹ cells/cm³ of sediment at the surface to 2.19–2.58×10⁹ cells/cm³ of sediment at a depth of 20 cm. No significant difference was found among four stations located on a transect which crossed the marsh and spanned subtidal to intertidal sediments.  相似文献   

Magmatic and hydrothermal inclusions in carbonatite of the Magnet Cove Complex,Arkansas   总被引：1，自引：0，他引：1  

Bruce E. Nesbitt  William C. Kelly 《Contributions to Mineralogy and Petrology》1977,63(3):271-294

The carbonatite at Magnet Cove, Arkansas, USA contains a great variety and abundance of magmatic and hydrothermal inclusions that provide an informative, though fragmentary, record of the original carbonatite melt and of late hydrothermal solutions which permeated the complex in postmagmatic time. These inclusions were studied by optical and scanning electron microscopy. Primary magmatic inclusions in monticellite indicate that the original carbonatite melt contained approximately 49.7 wt% CaO, 16.7% CO₂, 15.7% SiO₂, 11.4% H₂O, 4.4% FeO+Fe₂O₃, 1.1% P₂O₅ and 1.0% MgO. The melt was richer in SiO₂ and iron oxides than the carbonatite as now exposed; this is attributed to crystal settling and relative enrichment of calcite at shallower levels. The density of the carbonatite melt as revealed by the magmatic inclusions was approximately 2.2–2.3 g/cc. Such a light melt should separate rapidly from any denser parent material and could be driven forcibly into overlying crustal rocks by buoyant forces alone. Fluid inclusions in apatite suggest that a separate (immiscible) phase composed of supercritical CO₂ fluid of low density coexisted with the carbonatite magma, but the inclusion record in this mineral is inconclusive with respect to the nature of any other coexisting fluids. Maximum total pressure during CO₂ entrapment was about 450 bars, suggesting depths of 1.5 km or less for apatite crystallization and supporting earlier proposals of a shallow, subvolcanic setting for the complex. Numerous secondary inclusions in the Magnet Cove calcite contain an intriguing variety of daughter minerals including some 19 alkali, alkaline earth and rare earth carbonates, sulfates and chlorides few of which are known as macroscopic phases in the complex. The exotic fluids from which the daughter minerals formed are inferred to have cooled and diluted through time by progressive mixing with local groundwaters. These fluids may be responsible for certain late veins and elemental enrichments associated with the complex.  相似文献   

The entropy and Gibbs free energy of formation of the aluminum ion     

Bruce S. Hemingway  Richard A. Robie 《Geochimica et cosmochimica acta》1977,41(9):1402-1404

A reevaluation of the entropy and Gibbs free energy of formation of Al³⁺_(aq) yields ?308 ± 15 J/K·mol and 489.4 ± 1.4kj/mol for S⁰₂₉₈ and $\text{ΔG}{}^0{}_{\mathrm{?,298}}$ respectively. The standard electrode potential for aluminum is 1.691 ± 0.005 volts.  相似文献   

Chemistry in the environment: Readings from Scientific American: Introductions by Carole L. Hamilton.W. E. Freeman & Co., 1973. 361 pp., $12.00 cloth; $5.95 paper     

Bruce B. Hanshaw 《Geochimica et cosmochimica acta》1974,38(5):805

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Reply     

Bruce Marsh 《Contributions to Mineralogy and Petrology》2015,169(2):1-9

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Clumpy and fractal shocks, and the generation of a velocity dispersion in molecular clouds     

C. L. Dobbs  I. A. Bonnell 《Monthly notices of the Royal Astronomical Society》2007,374(3):1115-1124

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