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  • Artikel  (49)
  • Neueste Artikel (Zeitschrifteninhaltsverzeichnisse / in press)  (38)
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  • Artikel  (49)
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  • Neueste Artikel (Zeitschrifteninhaltsverzeichnisse / in press)  (38)
  • Artikel: DFG Deutsche Nationallizenzen  (11)
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  • 1
    Digitale Medien
    Digitale Medien
    GROUND-PENETRATING RADAR FOR HIGH-RESOLUTION MAPPING OF SOIL AND ROCK STRATIGRAPHY (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 37 (1989), S. 0 
    Details
    ISSN: 1365-2478
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie , Physik
    Notizen: Ground-penetrating radar is a technique which offers a new way of viewing shallow soil and rock conditions. The need to better understanding overburden conditions for activities such as geochemical sampling, geotechnical investigations, and placer exploration, as well as the factors controlling groundwater flow, has generated an increasing demand for techniques which can image the subsurface with higher resolution than previously possible.The areas of application for ground-penetrating radar are diverse. The method has been used successfully to map ice thickness, water depth in lakes, bedrock depth, soil stratigraphy, and water table depth. It is also used to delineate rock fabric, detect voids and identify karst features. The effective application of the radar for the high-resolution definition of soil stratigraphy and fractures in bedrock is highlighted.The basic principles and practices involved in acquiring high quality radar data in the field are illustrated by selected case histories. One example demonstrates how radar has been used to map the bedrock and delineate soil horizons to a depth of more than 20 m. Two case histories show how radar has been used to map fractures and changes of rock type to 40 m range from inside a mine. Another case history demonstrates how radar has also been used to detect and map the extent of groundwater contamination. The corroboration of the radar results by borehole investigations demonstrates the power and utility of the high-resolution radar method as an aid for interpolation and extrapolation of the information obtained with conventional coring programmes. With the advent of new instrumentation and field procedures, the routine application of the radar method is becoming economically viable and the method will see expanded use in the future.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2478.1989.tb02221.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Impact of Coal Ash from Electric Power Production on Changes in Water Quality (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 18 (1982), S. 0 
    Details
    ISSN: 1752-1688
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung , Geographie
    Notizen: : Since 1972 the use of coal in the U.S. has increased much more rapidly than predicted, with much of this increased use by electric power generating plants. Residue after combustion consists primarily of inorganic materials, with the majority of chemical elements concentrated in fly ash as is sulfate. The concentration of sulfate in this ash fraction most affects the chemical and physical state of other elements when fly ash comes in contact with water by lowering the pH. In a properly constructed and operated ash settling basin, however, major water quality parameters of effluent may be improved as compared to source water. It is necessary, however, to consider the solubility or deposition in sediment of potentially toxic chemical elements from fly ash as these may affect reuse of this water, or as they may impact other parts of the aquatic environment.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1752-1688.1982.tb04542.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    WHAT IS HYDROGEOLOGY? (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 27 (1989), S. 0 
    Details
    ISSN: 1745-6584
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Energietechnik , Geologie und Paläontologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1745-6584.1989.tb00433.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Prospect Risk Analysis Applied to Ground-Water Reservoir Evaluation (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 20 (1982), S. 0 
    Details
    ISSN: 1745-6584
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Energietechnik , Geologie und Paläontologie
    Notizen: A methodology is proposed which provides predevelopment assessments of the potential yield of ground-water reservoirs. A systematic assessment of aquifer parameters leads to estimates of ground-water storage capacity and the geologic risks that may affect those estimates. Area of reservoir, average saturated thickness of aquifers to a limit of economic dewatering, and average specific yield, all arrived at through a Delphi procedure are combined in a Monte Carlo simulation to yield an unrisked product at several probability levels. Marginal probabilities are assigned to each parameter and combined in a further Monte Carlo simulation to yield a series of risked estimates. The results are expressed in a table and as cumulative probability curves of ground-water storage capacity that can provide a basis for economic modeling. The method is analogous to methods widely applied in the petroleum and other extractive industries. All basic hydrogeologic data are laid out in a systematic way, permitting planners to compare reservoirs on a common basis and to judge the reliability of the estimates. Once the geologic models have been developed, they can be updated readily as additional information becomes available. The method is particularly well-suited to preliminary assessments of the development potential of undeveloped or poorly-explored areas, and to regional evalution where only parts of the regional have been subject to intensive ground-water development.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1745-6584.1982.tb01383.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Aetiology of stem canker diseases of pigeonpea in Fiji (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 38 (1989), S. 0 
    Details
    ISSN: 1365-3059
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Xanthomonas campestris pv. cajani is reported for the first time from Fiji as the cause of potentially serious pustular stem lesions of pigeonpea. Cultivars and breeding lines differed in susceptibility. The cause of another stem canker disease, characterized by smooth lesions, remains undetermined.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-3059.1989.tb02165.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Selection of a new set of homogeneously reacting bean (Phaseolus vulgaris) differentials to differentiate races of Colletotrichum lindemuthianum (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 38 (1989), S. 0 
    Details
    ISSN: 1365-3059
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Twenty-two cultivars of Phaseolus vulgaris, mentioned in the literature as differential cultivars or sources of resistance, were screened with isolates representing 10 races of Colletotrichum lindemuthianum, to test their suitability as differentials. Single-plant selections from eight cultivars were chosen, with genetic uniformity for resistance and with clear positive or negative reactions following inoculation with all 10 individual races. These differentials are proposed as a standard set for international use, to make the identification of C. lindemuthianum races internationally more comparable. The criteria for a set of differentials, and the influence of cultivar, fungus race and environment on the host-pathogen reaction are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-3059.1989.tb02158.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Flavor and Selected Chemical Components of Ground Beef from Steers Backgrounded on Pasture and Fed Corn up to 140 Days (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 47 (1982), S. 0 
    Details
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Flavor and selected chemical components of ground beef from 60 steers were studied as a function of days (up to 140) that corn was fed to steers after grazing on pasture. During the 140 days on corn, significant changes occurred in the fatty acid composition of ground beef and in its carbohydrate content, titratable acidity, volatile fatty acid content, aroma and flavor. Flavor changes were related to certain chemical components. Results indicate that finishing cattle on corn for periods longer than 80–90 days causes little change in beef flavor.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2621.1982.tb12694.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Relationship of USDA Maturity Groups to Palatability of Cooked Beef (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 47 (1982), S. 0 
    Details
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: In comparison to carcasses of B, C or E maturity, carcasses of A maturity produced broiled steaks which: (a) had higher (P 〈 0.05) palatability ratings in 62 to 86% of comparisons, (b) were decidedly less variable (C.V.), (c) were more likely to be assigned high (≥ 6.00) and less likely to be assigned low (≤ 2.99) sensory panel ratings, and (d) were more likely to have low (≤ 3.63 kg) and less likely to have high (≥ 6.35 kg) shear force values. Position within the A or A + B maturity group(s) explained 0–4% (loin steaks) and 10–18% (round steaks) of the observed variation in overall palatability ratings and/or shear force values.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2621.1982.tb07627.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    FACTORS INVOLVED IN EVALUATING GROUND WATER IMPACTS OF DEEP COAL MINE DRAINAGE (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 18 (1982), S. 0 
    Details
    ISSN: 1752-1688
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung , Geographie
    Notizen: : The determination of probable ground water impacts of proposed deep coal mining is required as part of permit applications. Impact prediction generally involves well production test analysis and modeling of ground water systems associated with coal seams. Well production tests are often complicated due to the relatively low permeabilities of sandstones and shales of ground water systems. The effects of the release of water stored within finite diameter production wells must be considered. Well storage capacity appreciably affects early well production test time drawdown or time recovery data. Low pumping rates, limited cones of depression, and length of required pumping periods ate important well production test design factors.Coal seam ground water system models are usually multilayered and leaky artesian. Mine drafts partially penetrate the ground water system. Simulation of coal mine drainage often involves the horizontal permeability and storage coefficient of the coal seam zone, vertical permeabilities of sandstones and shales (aquitard) above and below the coal seam zone, and the hydrologic properties of the source bed above the aqultard overlying the coal seam zone. Ground water level declines in both the coal seam zone and source bed near land surface are necessary factors in impact analysis. An example of evaluation studies in southwest Indiana will illustrate factors involved in deep coal mine drainage modeling efforts.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1752-1688.1982.tb00080.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Precursors to P‘P’ re-examined using broad-band data (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 99 (1989), S. 0 
    Details
    ISSN: 1365-246X
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie
    Notizen: Observations of underside P-wave reflections from discontinuities deep within the upper mantle which precede the P'P’ phase have provided important constraints on the existence and physical properties of these dynamically critical features. In this study, we extend earlier work by examining for the first time, broad-band recordings of those earthquakes for which one would expect to observe P'P’ and its associated precursors P'dP’. An exhaustive search of 20 yr of Carnegie data and 11 yr of Gräfenberg data uncovered a number of fine P‘P’ observations, but in only one or perhaps two instances are there evidence of a precursor from near 670 km depth. These null results are consistent with what has been reported in earlier studies and provide us with an opportunity to estimate the variability of P velocity near 670 km or, alternatively, the scale length of discontinuity topography which acts to defocus the precursor. This has been done by using the reflectivity and Gaussian beam methods to compute synthetic seismograms for a suite of 1-D and 2-D earth models which vary slightly from PREM. We find that the null data may be satisfied either by (i) reducing the PREM impedance jump at 670 km from 8.5 to 4-5 per cent; (ii) smoothing this 8.5 per cent jump linearly over a zone 15-30 km thick or (iii) imposing deformations in the 670 km discontinuity as small as 10 km in amplitude and 300 km in wavelength. For the one case of an observed precursor, the relative size of the underside reflection and main P‘P’ phase suggests that, in this instance, the precursor's amplitude is correctly predicted by PREM.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-246X.1989.tb02044.x
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