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  • 2000-2004  (8)
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  • 1
    Digitale Medien
    Digitale Medien
    Shock loadings on thin film manganin gauges packaged by vapor-deposited alumina (2002)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 73 (2002), S. 1967-1969 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: To extend the measurement range to 100 GPa, a modified manganin gauge was prepared and examined. The modifications were focused on the package materials and technique. The manganin sensing elements were first deposited by magnetron sputtering on Al2O3 substrates, and then covered by a layer of Al2O3 films several μm thick by electron beam evaporation. After being placed on slabs of Al2O3 ceramic, the gauges were shocked to 40–80 GPa with a light gas gun. The stress-time profiles showed a good plateau of about 1 μs in duration. The initial calibration resulted in a linear curve with piezoresistance coefficient of 0.0198±0.0002 GPa−1. © 2002 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1460927
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  • 2
    Digitale Medien
    Digitale Medien
    Genetic analysis of presence and absence of lint and fuzz in cotton (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 120 (2001), S. 0 
    Details
    ISSN: 1439-0523
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Cotton fibre mutants that were fuzzless and/or lintless were crossed with each other and a normal genotype (fuzzy, linted) to produce F2 and BC1 generations. F2 segregation ratios from the cross of fuzzless-lintless × fuzzy-linted, for fuzzy-linted, fuzzless-linted and fuzzless-lintless were 45 : 15 : 4. From the cross of fuzzless-lintless × fuzzy-linted, the F2 segregation ratios were 9 : 39 : 16 whereas the BC1F1 segregation ratios from the F1 backcrossed to fuzzless-lintless were 1 : 3 : 4. These data suggest that the presence or absence of lint and fuzz are controlled by the interaction of four gene loci on non-homologous chromosomes. We designate these loci as N1, N2, Li3 and Li4, where N1 N1 confers the presence of fuzzy, N2N2 confers inhibition of fuzzy initiation and development, and duplicate gene pairs, Li3Li3 and Li4Li4, determine the presence of lint. Homozygosity for li3li3 and li4li4 might also inhibit fuzz from development. In other words, they were recessive epistatic to fuzz genes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1439-0523.2001.00643.x
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  • 3
    Digitale Medien
    Digitale Medien
    Penetration of N-nitrosonornicotine (NNN) across oral mucosa in the presence of ethanol and nicotine (2000)
    Copenhagen : Munksgaard International Publishers
    Journal of oral pathology & medicine 29 (2000), S. 0 
    Details
    ISSN: 1600-0714
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Abstract: The effects of ethanol concentrations of 5, 15, 20, 25, 27, 30 and 50% on the penetration of the tobacco-specific carcinogen, nitrosonornicotine (NNN), across porcine oral mucosa were examined using an in vitro perfusion system. Concentrations of ethanol of 25% and above significantly increased the permeability of oral mucosa to NNN, although this increase ceased with 50% ethanol, possibly due to a fixative effect. Nicotine is a consistent component of smoked and smokeless tobacco; the presence of 0.2% nicotine significantly increased the permeability of oral mucosa to NNN and 2% nicotine caused a further increase. Combined use of nicotine and ethanol significantly increased the penetration of NNN across oral mucosa over that of ethanol alone until the concentration of ethanol reached 50%. The results of this study suggest that the synergy between tobacco and alcohol in the etiology of oral cancer may be explained, at least in part, by the local permeabilizing effects of alcohol on the penetration of tobacco-specific (and other) carcinogens across oral mucosa.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1034/j.1600-0714.2000.290205.x
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  • 4
    Digitale Medien
    Digitale Medien
    Identification of Lps2 as a key transducer of MyD88-independent TIR signalling (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 424 (2003), S. 743-748 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] In humans, ten Toll-like receptor (TLR) paralogues sense molecular components of microbes, initiating the production of cytokine mediators that create the inflammatory response. Using N-ethyl-N-nitrosourea, we induced a germline mutation called Lps2, which abolishes cytokine responses to ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nature01889
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  • 5
    Digitale Medien
    Digitale Medien
    Epitaxial growth of solution deposited Bi $_\mathsf{2}$ Sr $_\mathsf{2}$ CaCu $_\mathsf{2}$ O $_\mathsf{x}$ films (2004)
    Springer
    The European physical journal 39 (2004), S. 149-154 
    Details
    ISSN: 1434-6036
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. The epitaxial growth of Bi2Sr2CaCu2O x (Bi2212) high temperature superconducting thin films was studied. The films were solution-deposited from a polymer-containing precursor onto SrTiO3 (001) substrates. Bi2212 formed an epitaxial phase with the c-axis parallel to the substrate normal and an in-plane orientation with the a-axis parallel to the SrTiO3 [110] and [ $\bar{1}$ 10] directions. This phase was found to be robust with respect to small changes in stoichiometry, where the appearance of an additional BiSrCuO phase was observed. This minority phase had no major effect on the epitaxial alignment of the Bi2212 phase or the critical temperature of the thin-film sample.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1140/epjb/e2004-00191-0
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  • 6
    Digitale Medien
    Digitale Medien
    Epitaxial growth of solution deposited YBa2Cu3O7-δ films (2004)
    Springer
    The European physical journal 42 (2004), S. 483-490 
    Details
    ISSN: 1434-6036
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. The solution deposition of YBa2Cu3O7-δ (Y123) high temperature superconducting thin films was studied. The films were prepared from a polymer-containing precursor onto SrTiO3 (001) and LaAlO3 (001) substrates and mineralized at high temperatures. The process depended on details of the film preparation in a delicate fashion, resulting either in superconducting or non-superconducting thin films. To elucidate this difference in conductivity, scanning electron microscopy and several X-ray diffraction techniques were used to characterize the resulting Y123 layers. Both the morphology of the film and the percentage of non-superconducting minority components are likely to be the origin of the difference in the conductance behavior at low temperatures.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1140/epjb/e2005-00006-x
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  • 7
    Digitale Medien
    Digitale Medien
    γ ↔ α2 Phase transformation in fractured high temperature stress rupture Ti-48Al-2Nb(at.%) (2000)
    Springer
    Journal of materials science 35 (2000), S. 4501-4505 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The γ ↔ α2 phase transformation in fractured high temperature stress rupture Ti-48Al-2Nb(at.%) alloy has been studied by analytical electron microscopy. α2 and γ phases were found at grain boundaries. α2 layers that suspended in γ layers and interfacial ledge higher than 2d (111)γ at γ/α2 interfaces were observed in the lamellar grains. These facts indicated that γ ↔ α2 phase transformation and dynamic recrystallization have occurred during high temperature stress rupture deformation. It can be concluded that deformation induced γ ↔ α2 phase transformation and dynamic recrystallization resulted in the presence of γ particles at grain boundaries. A structural and compositional transition area between deformation-induced α2(or γ) and its adjacently original γ(or α2) phases was found by HREM and EDS and is suggested as a way to transform between γ and α2 phase during high temperature stress rupture deformation. The transition area was formed by slide of partial dislocations on close-packed planes and diffusion of atoms.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1004856301770
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  • 8
    Digitale Medien
    Digitale Medien
    Atom trap trace analysis (2000)
    Springer
    Hyperfine interactions 127 (2000), S. 515-518 
    Details
    ISSN: 1572-9540
    Schlagwort(e): ATTA ; atom trap trace analysis ; magneto optical trap ; 85Kr ; 81Kr
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A new method of ultrasensitive isotope trace analysis has been developed. This method, based on the technique of laser manipulation of neutral atoms, has been used to count individual 85Kr and 81Kr atoms present in a natural krypton gas sample with isotopic abundances in the range of 10−11 and 10−13, respectively. The method is free of contamination from other isotopes and elements, and can be applied to many different isotope tracers for a wide range of applications.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1012698508113
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