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  • 1
    Electronic Resource
    Electronic Resource
    Authors' Reply (1999)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 106 (1999), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1999.tb08199.x
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  • 2
    Electronic Resource
    Electronic Resource
    Growth of Pb(Mg1/3Nb2/3)O3-35 mol% PbTiO3 Single Crystals from (111) Substrates by Seeded Polycrystal Conversion (1999)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 82 (1999), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Fully dense disks, each consisting of a single crystal (111) plate of the relaxor-based ferroelectric Pb(Mg1/3Nb2/3)O3-35 mol% PbTiO3 (PMN-35PT) embedded in a 0.48 ± 0.05 µm grain size polycrystalline matrix of the same composition, were formed by hot-pressing at 950°C for 30 min under 20 MPa. Specimens were subsequently annealed to promote migration of the single-crystal boundary through the polycrystal (a process termed seeded polycrystal conversion). An anneal of 10 h at 1150°C using PMN-35PT packing powder resulted in minimal single-crystal boundary migration, and was accompanied by matrix grain coarsening to 1.86 ± 0.20 µm. In contrast, an anneal of 10 h at 1150°C using PbZrO3 (PZ) sacrificial powder resulted in significant migration of the single-crystal boundary through the polycrystal, accompanied by matrix grain coarsening to 13.3 ± 0.3 µm. The shape of the grown crystal relative to the seed plate was consistent with the 〈111〉 direction being the fastest growth direction. Based on the grown crystal dimensions, a lower bound 〈111〉 growth velocity of 0.14 mm/h was calculated. The increased boundary mobility in the specimen that was annealed using PZ sacrificial powder is attributed to a boundary-wetting liquid PbO-based second phase that formed during the anneal. This phase is believed to have formed via PbO absorption from the surrounding vapor phase due to a higher equilibrium PbO vapor pressure above PZ than above PMN-35PT. The grown single crystal exhibited a promising 〈100〉 strain of 0.5% at an applied electric field of 4 MV/m.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.1999.tb02188.x
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  • 3
    Electronic Resource
    Electronic Resource
    Arteriovenous Fistula After Injury of the Left Internal Mammary Artery During Extraction of Pacemaker Leads with a Laser Sheath (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Pacing and clinical electrophysiology 22 (1999), S. 0 
    Details
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The left internal mammary artery was severed and an arteriovenous fistula created during extraction of pacemaker leads with a laser sheath.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8159.1999.tb00556.x
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  • 4
    Electronic Resource
    Electronic Resource
    Third trimester abortion: is compassion enough? (1999)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 106 (1999), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1999.tb08264.x
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Risk-Based Assessment of Soil and Groundwater Quality in the Netherlands: Standards and Remediation Urgency (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Risk analysis 19 (1999), S. 0 
    Details
    ISSN: 1539-6924
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: To assess soil and groundwater quality two generic (i.e. multifunctional) risk-based standards, Target and Intervention Value, have been developed, in the framework of the Dutch Soil Protection Act. These standards allow soil and groundwater to be classified as clean, slightly contaminated or seriously contaminated. The Target Value is basedon potential risks to ecosysystems, while the Intervention Value is based oqpotential risks to humans and ecosystems. In the case of serious soil contamination the site has, in principle, to be remediated, making it necessary to determine the remediation urgency on the basis of actual (i.e. site-specific) risks to humans and ecosystems and, besides, actual risks due to contaminant migration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1539-6924.1999.tb01142.x
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  • 6
    Electronic Resource
    Electronic Resource
    Images of Main Street: Disney World and the American Adventure (1999)
    Oxford, UK : Blackwell Publishing Ltd.
    The @journal of American culture 22 (1999), S. 0 
    Details
    ISSN: 1542-734X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: English, American Studies
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1542-734X.1999.00085.x
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  • 7
    Electronic Resource
    Electronic Resource
    Risk-Based Assessment of Soil and Groundwater Quality in the Netherlands: Standards and Remediation Urgency (1999)
    Springer
    Risk analysis 19 (1999), S. 1235-1249 
    Details
    ISSN: 1539-6924
    Keywords: soil contamination ; remediation urgency ; standards ; human exposure ; ecotoxicological risks ; risk due to contaminant migration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract To assess soil and groundwater quality two generic (i.e. multifunctional) risk-based standards, Target and Intervention Value, have been developed, in the framework of the Dutch Soil Protection Act. These standards allow soil and groundwater to be classified as clean, slightly contaminated or seriously contaminated. The Target Value is based on potential risks to ecosystems, while the Intervention Value is based on potential risks to humans and ecosystems. In the case of serious soil contamination the site has, in principle, to be remediated, making it necessary to determine the remediation urgency on the basis of actual (i.e. site-specific) risks to humans and ecosystems and, besides, actual risks due to contaminant migration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007003332488
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  • 8
    Electronic Resource
    Electronic Resource
    Low Incidence of Significant Valvar Insufficiency Following Retrograde Aortic Radiofrequency Catheter Ablation in Young Patients (1999)
    Springer
    Journal of interventional cardiac electrophysiology 3 (1999), S. 181-185 
    Details
    ISSN: 1572-8595
    Keywords: pediatrics ; ablation ; tachycardia ; mitral insufficiency ; transseptal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The incidence of significant valvar insufficiency at late (〉6 month) follow-up was retrospectively evaluated in 27 young patients (age 4.0–18.0 years) undergoing 29 ablation procedures via the retrograde aortic approach for left-sided accessory connections in whom pre-ablation and post-ablation echocardiograms were available for review. Valvar insufficiency was graded using color flow techniques as absent, trivial, mild, moderate, or severe by blinded reviewers. Ablation was acutely successful via the retrograde approach in 25 of 29 procedures among these 27 patients. Successful ablation was ultimately achieved in all 27 patients. At baseline, 7 patients had evidence of trivial or mild mitral insufficiency, and no patient had aortic insufficiency. Three patients had evidence of impaired left ventricular systolic performance in the presence of manifest pre-excitation. At follow-up, pre-existing mitral insufficiency resolved in 5/7 patients, and persisted in 2 patients. New mitral insufficiency was evident in 3 patients, and new aortic insufficiency was transiently evident in 1 patient following ablation (all trivial). Institutional experience (mean rank 10 cases vs. 33 cases, p 〈 .0005), and lower patient weight (29.7 vs. 56.3 kilograms, p = .01) were the only factors associated with the development of new valvar insufficiency. Valvar insufficiency could not be detected by careful auscultation in any patient and was deemed clinically insignificant in all patients. We conclude that ablation of left-sided accessory connections can be performed via the retrograde aortic approach without creating clinically significant valvar insufficiency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009885917479
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  • 9
    Electronic Resource
    Electronic Resource
    Mechanisms of Hydroquinone-Induced Growth Reduction in Leafy Spurge (1999)
    Springer
    Journal of chemical ecology 25 (1999), S. 1611-1621 
    Details
    ISSN: 1573-1561
    Keywords: Hydroquinone ; allelopathy ; plant water balance ; photosynthesis ; chlorophyll fluorescence ; 13C isotopes ; leafy spurge ; Euphorbia esula ; small everlasting ; Antennaria microphylla Rydb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Field observations indicate leafy spurge (Euphorbia esula) is inhibited by the presence of Antennaria microphylla. Hydroquinone (HQ), one of several compounds isolated from A. microphylla has been shown to inhibit leafy spurge seed germination, root elongation, and callus culture growth. The present study was designed to analyze the effects of HQ on water relations and photosynthesis of leafy spurge. Plants grown in 0.25 mM HQ had consistently higher leaf diffusive resistance and lower transpiration rates than control plants (P 〈 0.05). Chlorophyll fluorescence was significantly lower than controls (P 〈 0.05) towards the end of the treatment period. At the end of the treatment, tissue from 0.25 mM HQ plants had higher levels of 13C, indicating there had been a sustained interference with stomatal function. These data suggest that a disruption of the plant water balance is one mechanism of leafy spurge inhibition by A. microphylla.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1020892917434
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  • 10
    Electronic Resource
    Electronic Resource
    The Validity of Environmental Benefits Transfer: Further Empirical Testing (1999)
    Springer
    Environmental and resource economics 14 (1999), S. 95-117 
    Details
    ISSN: 1573-1502
    Keywords: benefits transfer ; contingent valuation ; environmental valuation ; validity testing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
    Notes: Abstract This paper provides further empirical evidence of the validity of environmental benefits transfer based on CV studies by expanding the analysis to include control factors which have not been accounted for in previous studies. These factors refer to differences in respondent attitudes. Traditional population characteristics were taken into account, but these variables do not explain why respondents from the same socio-economic group may still hold different beliefs, norms or values and hence have different attitudes and consequently state different WTP amounts. The test results are mixed. The function transfer approach is valid in one case, but is rejected in the 3 other cases investigated in this paper. We provide further evidence that in the case of statistically valid benefits transfer, the function approach results in a more robust benefits transfer than the unit value approach. We also show that the equality of coefficient estimates is a necessary, but insufficient condition for valid benefit function transfer and discuss the implications for previous and future validity testing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008377604893
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