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  • 1
    Electronic Resource
    Electronic Resource
    Effect of bioremediation on polycyclic aromatic hydrocarbon residues in soil (1990)
    s.l. : American Chemical Society
    Environmental science & technology 24 (1990), S. 1086-1089 
    Details
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/es00077a020
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Supercritical fluid extraction of coal tar contaminated soil (1990)
    s.l. : American Chemical Society
    Environmental science & technology 24 (1990), S. 1732-1738 
    Details
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/es00081a017
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A small-area high-Tc superconducting bolometer with Y-Ba-Cu-O thin film (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 93-96 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A small-area high-Tc superconducting bolometer with a dense YBCO meander wire on a (100) Zr(Y)O2 substrate has been tested at λ=1.5 μm using a diode laser as the radiation source. The infrared power absorbed by the bolometer was calibrated using a dc infrared substitution method. Responsivities of hundreds of V/W with a millisecond response time were obtained at a temperature of 86.5 K in the modulation frequency range of 10–3000 Hz. A minimum noise equivalent power of 6×10−11 W/Hz1/2 was measured at 1000 Hz. The experimental results are compared with those obtained from a thermal analysis of the substrate-supported microbolometer. No nonbolometric effect was distinguished.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144754
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    PROTECTING AGRICULTURAL CROPS FROM THE EFFECTS OF TROPOSPHERIC OZONE EXPOSURE: Reconciling Science and Standard Setting in the United States, Europe, and Asia (2001)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 26 (2001), S. 237-268 
    Details
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Ozone (O3) is well documented as the air pollutant most damaging to agricultural crops and other plants. Most crops in developed countries are grown in summer when O3 concentrations are elevated and frequently are sufficiently high to reduce yields. This article examines the difficulties in scientifically determining the reduction in yield that results from the exposure of agricultural crops to surface O3 and then transforming that knowledge into efficient and effective regulatory standards. The different approaches taken by the United States and Europe in addressing this issue as well as the few studies that have been conducted to date in developing countries are examined and summarized. Extensive research was conducted in the United States during the 1980s but has not been continued. During the 1990s, the European community forged ahead with scientific research and innovative proposals for air-quality standards. These efforts included the development of a "critical level" (CL) for O3 based on a cumulative exposure above a cutoff concentration below which only an acceptable level of harm is incurred. Current research focuses on estimating O3 dosage to plants and incorporating this metric into regulatory standards. The US regulatory community can learn from current European scientific research and regulatory strategies, which argue strongly for a separate secondary standard for O3 to protect vegetation. Increasing impacts of O3 on crops are likely in developing countries as they continue to industrialize and their emissions of air pollutants increase. More research is needed on surface O3 concentrations in developing countries, on their projected increase, and on the sensitivity that crop cultivars used in developing countries have to O3. The threat of reduced agricultural yields due to increasing O3 concentrations may encourage developing countries to increase their energy efficiency and to use different energy sources. This could simultaneously achieve a local benefit through improved regional air quality and a global benefit through a reduction in the emission of greenhouse gases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.energy.26.1.237
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Purification of L-Aspartase by Gene Fusion (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 799 (1996), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1996.tb33237.x
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  • 6
    Electronic Resource
    Electronic Resource
    Nutrient composition of Douglas-fir rhizosphere and bulk soil solutions (1998)
    Springer
    Plant and soil 200 (1998), S. 13-20 
    Details
    ISSN: 1573-5036
    Keywords: bulk soil ; Douglas-fir ; nutrient concentration ; rhizosphere ; soil solution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Rhizosphere soil solution is the direct source of nutrients for plant uptake. The nutrient composition of rhizosphere soil solution can be very different from that of bulk soil solution due to root exudation, nutrient uptake and rhizosphere microorganism activity. This study examined the nutrient composition of Douglas-fir rhizosphere soil solution in two soils belonging to the Nisqually and Pitcher soil series and compared rhizosphere solution with that of bulk soil solution. Fertilized and unfertilized Nisqually soils were also compared. Soil solutions were collected using centrifugation. Results indicated that nutrient concentrations in the rhizosphere solutions were typically higher than that of bulk soil solutions when no fertilizer was applied. Differences in the concentrations of nutrients between the rhizosphere and bulk soil solutions were masked by the addition of fertilizers. Rhizosphere solution pH also appeared to be affected by the concentration of NH4 and NO3 in the solution. With a higher concentration of NH4 relative to NO3 in the rhizosphere soil solution, the solution pH of the rhizosphere was lower than that of the bulk soil, but with a lower concentration of NH4 relative to NO3, the solution pH of the rhizosphere was higher than that of the bulk soil solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004240315308
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    Paper (German National Licenses)
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