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  • 1
    Electronic Resource
    Electronic Resource
    Biochemistry of Cyst Fluid in Fibrocystic Disease of the Breast (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 586 (1990), 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.1749-6632.1990.tb17786.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Cytogenetic study of a new resin composite for aerospace use
    Amsterdam : Elsevier
    Mutation Research/Environmental Mutagenesis and Related Subjects 203 (1988), S. 242 
    Details
    ISSN: 0165-1161
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0165-1161(88)90196-3
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Thermo-Structural Analysis of Ceramic Vanes for Gas Turbines (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advances in science and technology Vol. 45 (Oct. 2006), p. 1759-1764 
    Details
    ISSN: 1662-0356
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Natural Sciences in General , Technology
    Notes: Advanced structural ceramics such as Hot Pressed Silicon Nitride (HPSN) and ReactionBonded Silicon Carbide (RBSC), thanks to their low density (3.1 ÷ 3.4 gr/cm3) and to their thermostructuralproperties, are interesting candidates for aerospace applications. This research investigatesthe feasibility of employing such monolithic advanced ceramics for the production of turbine vanesfor aerospace applications, by means of a finite element analysis. A parametric study is performedto analyse the influence of the coefficient of thermal expansion, the specific heat, the thermalconductivity, and the Weibull modulus on structural stability, heat transfer properties and thermomechanicalstresses under take-off and flying conditions. A nodal point that is evidenced is the highintensity of thermal stresses on the vane, both on steady state and in transient conditions. In order toreduce such stresses various simulations have been carried out varying geometrical parameters suchas the wall thickness. Several open questions are evidenced and guidelines are drawn for the designand production of ceramic vanes for gas turbines
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.1759.pdf
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Benzene in environmental air and human blood (1998)
    Springer
    International archives of occupational and environmental health 71 (1998), S. 554-559 
    Details
    ISSN: 1432-1246
    Keywords: Keywords Benzene exposure ; Blood benzene ; Biological monitoring ; Workers ; General population ; Environmental exposure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: AbstractObjective: To study the blood benzene levels resulting from environmental and occupational benzene exposure. Methods: Benzene in venous blood was measured in 243 nonoccupationally exposed subjects (“normal” people) and in 167 workers occupationally exposed to benzene. All exposed workers gave blood samples at the end of the work shift and on the following morning before resuming work. Blood benzene was assayed by gas chromatography (GC)-mass spectrometry. Occupational benzene exposure was monitored by environmental personal samplers and measured by GC analysis. Results: The mean occupational benzene exposure for all 167 workers studied was 186 ng/l (58 ppb; range 5–1535 ng/l, 2–500 ppb). Overall, the mean blood benzene level of all workers was 420 ng/l at the end of the shift and 287 ng/l on the morning thereafter. The blood benzene levels measured the morning after turned out to be significantly lower (t = 3.6; P 〈 0.0001) than those measured at the end of the shift. The mean blood benzene level of the 243 “normal” subjects was 165 ng/l, which was significantly lower than that measured in the workers on the morning thereafter (t=5.8; P 〈 0.0000001). The mean blood benzene concentration was significantly higher in smokers than in nonsmokers in both the general population (264 versus 123 ng/l) and in the exposed workers. In the group of nonsmoking workers, whose workplace exposure to benzene was lower than 100 ng/l, blood benzene levels were similar (210–202 ng/l) to those measured in the nonsmoking general population (165 ng/l). End-of-shift blood benzene correlated significantly with environmental exposure (y=0.91x + 251; r=0.581; n=162; P 〈 0.00001). Finally, there was also a significant correlation between blood benzene measured at the end of the shift and that determined on the morning thereafter (y=0.45x + 109; r=0.572; n=156; P 〈 0.00001). Conclusion: Nonsmoking workers occupationally exposed to benzene at environmental levels lower than 100 ng/l (mean 35 ng/l) and the nonsmoking general population exposed to ubiquitous benzene pollution have similar blood benzene concentrations. This suggests that it is impossible to distinguish between occupational and environmental exposure when the benzene level in the workplace is less than 100 ng/l.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004200050323
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    Paper (German National Licenses)
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