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  • 1
    Electronic Resource
    Electronic Resource
    Color Reactions between Clays and Amines1 (1940)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 62 (1940), S. 1811-1814 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01864a046
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    STUDY OF TRAVELTIME AND AMPLITUDE TIME-LAPSE TOMOGRAPHY USING PHYSICAL MODEL DATA (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 41 (1993), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: In seismic tomography the observed traveltimes or amplitudes of direct waves are inverted to obtain an estimate of seismic velocity or absorption of the section surveyed. There has been much recent interest in using cross-well traveltime tomography to observe the progress of fluids injected into the reservoir rocks during enhanced oil recovery (EOR) processes. If repeated surveys are carried out, then EOR processes may be monitored over a period of time.This paper describes the results of a simulated time-lapse tomography experiment to image the flood zone in an EOR process. Two physical models were made out of epoxy resins to simulate an essentially plane-layered sedimentary sequence containing a reservoir layer and simple geological structure. The models differed only in the reservoir layer, which was uniform in the ‘pre-flood’ model and contained a flood zone of known geometry in the ‘post-flood’ model. Data sets were acquired from each model using a cross-well survey geometry. Traveltime and amplitude tomographic imaging techniques have been applied to these data in an attempt to locate the extent of the flood zone.Traveltime tomography locates the flood zone quite accurately. Amplitude tomography shows the flood zone as a region of higher absorption, but does not image its boundaries as precisely. This is primarily because of multipathing and diffraction effects, which are not accounted for by the ray-based techniques for inverting seismic amplitudes. Nevertheless, absorption tomograms could complement velocity tomograms in real, heterogeneous reservoirs because absorption and velocity respond differently to changes in liquid/gas saturations for reservoir rocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1993.tb00873.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A rheed study of the adsorption of oxygen, hydrogen, nitrogen and water vapour on the (100) face of tantalum
    Amsterdam : Elsevier
    Surface Science 28 (1971), S. 581-597 
    Details
    ISSN: 0039-6028
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0039-6028(71)90065-3
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Patient satisfaction following bladder neck suspension (1992)
    Springer
    International urogynecology journal 3 (1992), S. 100-103 
    Details
    ISSN: 1433-3023
    Keywords: Quality of life ; Surgery ; Urinary incontinence ; Stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Stress urinary incontinence is a common problem; 107 women undergoing bladder neck suspension between 1982 and 1989 were reviewed. Seventyfour responded via questionnaire and underwent chart review. Leakage resolved in 83%, with a mean follow-up of 23 months. Sixty-eight per cent were satisfied with the procedure outcome. Preoperative leakage with coughing and work-related activities predicted procedure success, while symptom resolution, number of postoperative pads required, leakage with preoperative coughing and work-related activities predicted patient satisfaction. Postoperative detrusor instability caused the discrepancy between leakage resolution and patient satisfaction. A complication rate of 15.9% was significantly higher in patients who had undergone prior procedures (p〈0.001).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00455081
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Development of a sediment bioassay to determine bioavailability of PAHs to fish (1995)
    Springer
    Journal of aquatic ecosystem stress and recovery 4 (1995), S. 169-181 
    Details
    ISSN: 1573-5141
    Keywords: EROD ; MFO ; PAH ; sediment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Recent work has shown that MFO induction and loss of control of steroid hormone production occurs in fish after exposure to pulp mill effluents, PCBs, PAHs, and some pesticides. We had recently developed laboratory assays to evaluate the effluents on these responses, but were lacking a protocol for a sediment assay. This paper describes the development of a sediment test capable of demonstrating MFO induction in fish. MFO responses were evident in rainbow trout within 4 days of exposure to contaminated sediments. Further testing showed that fish were responding to chemicals from the sediments, but not from bottom water, and a survey of sediment from thirteen contaminated areas showed that MFO induction more closely paralleled PAH levels in the sediments than the observed PCB concentrations. The sites showing MFO induction were also the sites where sediment toxicity was demonstrated with laboratory bioassays using Daphnia magna and Hyalella azteca. The protocol has been further refined to describe the quantity of sediment required and duration of testing. This test will enable us to study the biochemical effects of exposure to contaminated sediments. The protocol could also be used to prioritize areas of contamination and to evaluate dredging impacts and remediation success.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00116652
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    Paper (German National Licenses)
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