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  • Articles: DFG German National Licenses  (49)
  • 2000-2004  (49)
  • 1915-1919
  • 2004  (49)
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Material
Years
  • 2000-2004  (49)
  • 1915-1919
Year
  • 1
    Electronic Resource
    Electronic Resource
    Effect of Different Ceramic Surface Treatments on Resin Microtensile Bond Strength (2004)
    350 Main Street , Malden , MA 02148 , USA , and 9600 Garsington Road , Oxford OX4 2DQ , UK . : Blackwell Science Ltd
    Journal of prosthodontics 13 (2004), S. 0 
    Details
    ISSN: 1532-849X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Purpose:The objective of this study was to evaluate the effect of different surface treatments on the microtensile bond strength (μ-tbs) of composite bonded to hot-pressed ceramic. The null hypothesis tested was that neither of the surface treatments (silanization or fluoric acid etching) would produce greater bond strength of composite resin to the ceramic. Materials and Methods:Four 7 × 7 × 5 mm hot-pressed ceramic blocks of IPS Empress 2 were fabricated and polished to 600 grit followed by sandblasting with 50 μm alumina. The ceramic blocks were then divided into four groups and submitted to the following surface treatments: Group 1: 9.5% hydrofluoric (HF) acid for 20 seconds and silane (S) for 3 minutes; Group 2: silane for 3 minutes; Group 3: 9.5% HF acid for 20 seconds; Group 4: no treatment. Scotchbond adhesive was applied to the treated ceramic surfaces and covered with Filtek Z250 composite resin. The composite-ceramic blocks were cut with an Isomet low speed diamond saw machine producing sticks (n = 25), which were loaded to failure under tension in an Instron Universal testing machine. The mean μ-tbs was analyzed with one-way ANOVA and Bonferroni “t” test. Results:All specimens of Group 4 experienced adhesive failure during the cutting of the block and were eliminated. The mean μ-tbs and standard deviations (SD) in megaPascals were: Group 1 = 56.8 (±10.4), Group 2 = 44.8 (±11.6), Group 3 = 35.1 (±7.7). Statistical analysis showed that the bond strength was significantly affected by surface treatment (p 〈 0.0001). Group 1 (HF + S) had the highest μ-tbs, and Group 2 (S) had higher μ-tbs than Group 3 (HF). The mode of fracture of the specimens was examined using scanning electron microscopy (SEM), and all fractures occurred within the adhesion zone. Conclusion:The results show that surface treatment is important for resin adhesion to ceramic and suggest that silane treatment was the main factor responsible for resin bonding to ceramic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1532-849X.2004.04007.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ant Community Development on Rehabilitated Ash Dams in the South African Highveld (2004)
    Oxford, UK; Malden, USA : Blackwell Science Inc
    Restoration ecology 12 (2004), S. 0 
    Details
    ISSN: 1526-100X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Ant communities have been widely used as indicators of minesite rehabilitation in Australia and are beginning to play a similar role in other parts of the world. Here we examine ant communities on rehabilitated ash dams associated with a coal-fired power station on the highveld of South Africa, to improve our understanding of ecosystem development on these substrates. Ants were sampled using pitfall traps at 11 ash-dam sites, ranging from unrehabilitated to 9-year-old rehabilitated sites, as well as two adjacent natural grassland sites. Sampling was conducted on 12 occasions from March 1997 to January 1999. Forty-nine ant species from 19 genera were recorded during the study. Site species richness was positively correlated with rehabilitation age, ranging from 10 to 25 at ash-dam sites, compared with 28 and 34 at the two natural grassland sites. There was a humped relationship between total ant abundance and rehabilitation age, with abundance peaking after 5–7 years at levels far higher than those at natural sites. Ordination analysis showed clear separation between ash-dam and natural sites along the first axis. The unrehabilitated ash-dam site was also separated from rehabilitated sites along the first axis. Sites of different rehabilitation age were separated along the second axis. Individual ant species showed clear successional patterns across the rehabilitation gradient. Although there was a clear successional trend for the development of ant communities on rehabilitated ash dams, this trend was not toward natural grassland. The lack of convergence toward ant communities of natural grasslands reflects the markedly different substrate and plant composition on ash dams and supports the widely held view that restoration of natural grassland communities is not a realistic goal of ash-dam rehabilitation. However, the development of species-rich ant communities, containing at least some late-successional species, indicates the potential for rehabilitated ash dams to support diverse and complex ecosystems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1061-2971.2004.00421.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    069
Scar Reduction by Adhesive Patches: Efficacy and Potential Mode of Action (2004)
    Oxford, UK; Malden, USA : Blackwell Science Ltd/Inc.
    Wound repair and regeneration 12 (2004), S. 0 
    Details
    ISSN: 1524-475X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: There is a wide spectrum of treatment modalities to manage hypertrophic scars, techniques like surgical excision, intralesional application of corticosteroids, pressure therapy or laser therapy are extensively used.From a cosmetic and physiological point of view scars are predominantly a concern of the patients, the cosmetic relevance for doctors is often of less importance. Therefore a treatment that can be performed by the patient her-/himself might be advantageous if it is efficacious and safe. Since the early 1980s so-called “silicone gel sheeting” has been a widely used safe clinical management option for hypertrophic scars and keloids.The principle of the latter treatment has now been adapted and optimised towards a specific easily applicable adhesive polyurethane patch. This breathable, hypoallergenic patch is very well tolerated and avoids – in contrast to silicone sheets – moisture accumulation on the skin. Several clinical studies on both mature scars and on scar formation after surgical incisions show a reduction in visibility, redness, and roughness of the scars. The recommended eight weeks treatment might even be interrupted daily for twelve hours; the scar reducing effect is achieved as well.Extensive investigations on the polyurethane patch in vivo and in vitro propose an improved remodelling process of the scar tissue due to thermal and pressure effects of the patch but not by stratum corneum hydration. In vivo a better microcirculation can be observed in the scar tissue after treatment and in vitro an activation of enzymes involved in the remodelling process can be measured.In summary, physical effects are likely to be responsible for the successful results in clinical studies and individual applications of the new polyurethane patch for the reduction of hypertrophic scars.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1067-1927.2004.0abstractbp.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Noninvasive Assessment of the Biventricular Pacing System (2004)
    350 Main Street , Malden , MA 02148 , USA , and 9600 Garsington Road , Oxford OX4 2DQ , UK . : Blackwell Science Inc
    Annals of noninvasive electrocardiology 9 (2004), S. 0 
    Details
    ISSN: 1542-474X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1542-474X.2004.91525.x
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Mental Health and Substance Abuse Innovations: Issues of Diffusion and Adoption (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical psychology 11 (2004), S. 0 
    Details
    ISSN: 1468-2850
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Psychology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1093/clipsy.bph069
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A GREEK METROLOGICAL KOINE: A LEAD WEIGHT FROM THE WESTERN BLACK SEA REGION IN THE ASHMOLEAN MUSEUM, OXFORD (2004)
    Oxford, UK and Malden, USA : Blackwell Publishing Ltd
    Oxford journal of archaeology 23 (2004), S. 0 
    Details
    ISSN: 1468-0092
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Archaeology
    Notes: Summary.  A unique commercial lead weight from the western Black Sea region is examined in its metrological and historical context. The style and combination of relief symbols on the object (Athenian owl and Kyzikene tunny) suggest a quarter mina in a market weight system used equivalently at Athens and Kyzikos by the last quarter of the fifth century BC, and developed within a long-term process of broad commercial integration of the Aegean and Black Seas in Classical times. The authors consider such a process to have been caused by the economic motivations of individual city-states, not the direct Athenian imperialism expressed in the so-called Standards Decree.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-0092.2004.00210.x
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Managing Partnerships with State-Owned Joint Venture Companies: Experiences from Vietnam (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Business strategy review 15 (2004), S. 0 
    Details
    ISSN: 1467-8616
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0955-6419.2004.00299.x
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Historical Injustice and the Right of Return (2004)
    Berkeley, Calif. : Berkeley Electronic Press (now: De Gruyter)
    Theoretical inquiries in law 5.2004, 2, art3 
    Details
    ISSN: 1565-1509
    Source: Berkeley Electronic Press Academic Journals
    Topics: Law
    Notes: There are two main sources of theoretical doubt regarding the validity of claims for reparation: the questions arising from the non-identity problem and those arising from the supersession thesis. Neither of them significantly undermines the Palestinian refugees' claims to reparations and a right of return.
    Type of Medium: Electronic Resource
    URL: http://www.bepress.com/til/default/vol5/iss2/art3
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    The Role of Clinical and Process Quality in Achieving Patient Satisfaction in Hospitals (2004)
    J. Mack Robinson College of Business, Georgia State University , Atlanta , GA 30303 , 404-651-4073, fax: 404-651-2804 : Decision Sciences
    Decision sciences 35 (2004), S. 0 
    Details
    ISSN: 1540-5915
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Managers constantly struggle with where to allocate their resources and efforts in managing the complex service delivery system called a hospital. In the broadest sense, their decisions and actions focus on two important aspects of health care—clinical or technical medical care that emphasizes “what” the patient receives and process performance that emphasizes “how” health care services are delivered to patients. Here, we investigate the role of leadership, clinical quality, and process quality on patient satisfaction. A causal model is hypothesized and evaluated using structural equation modeling for a sample of 202 U.S. hospitals. Statistical results support the idea that leadership is a good exogenous construct and that clinical and process quality are good intermediate outcomes in determining patient satisfaction. Statistical results also suggest that hospital leadership has more influence on process quality than on clinical quality, which is predominantly the doctors' domain. Other results are discussed, such as that hospital managers must be mindful of the fact that process quality is at least as important as clinical quality in predicting patient satisfaction. The article concludes by proposing areas for future research.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0011-7315.2004.02570.x
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Approximating the degrees of freedom for contrasts of genotypes laid out as subplots in an alpha-design in a split-plot experiment (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 123 (2004), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Alpha-designs have become popular in cultivar trials. Analysis is based on a mixed model. As a result of imbalance, inference tests require approximate methods. This paper investigates the Type I error control of different Satterthwaite approximations for the denominator degrees of freedom of Wald-type F-tests and t-tests in a two-factorial alpha-design with cultivars as the subplot factor and management intensities (fertilization, plant protection) as the main plot factor. Simulation results demonstrate good error control for cultivar comparison at the same intensity, with the need for an approximation which diminishes as the number of cultivars increases. By contrast, a comparison of intensities entails a more substantial departure from the nominal significance level, and this is not entirely offset by any of the approximations. The methods are demonstrated using two real data sets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0523.2003.00964.x
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