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  • 1
    Electronic Resource
    Electronic Resource
    Optical and structural properties of thin films deposited from laser fused Zirconia, Hafnia, and Yttria (1992)
    Springer
    Applied physics 54 (1992), S. 533-537 
    Details
    ISSN: 1432-0630
    Keywords: 78.65 ; 68.55 ; 81.40
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The optical and structural properties of films deposited from laser sintered Zirconia (ZrO2), Hafnia (HfO2), and Yttria (Y2O3) and from the commercially available (unprocessed material) Zirconia, Hafnia and Yttria, were studied and compared. All the films had low absorption. Films deposited from the laser sintered material had very low optical inhomogeneity. ZrO2 films showed negative inhomogeneity for films deposited from the unprocessed material. The refractive index increased for ZrO2 films deposited from the laser sintered material. HfO2 and Y2O3 films showed positive inhomogeneity when deposited from the unprocessed material. The refractive index of the films of these materials decreased when deposited from the laser sintered material. The thin films of ZrO2 and Y2O3 prepared from laser sintered material had stable monoclinic and cubic structures respectively while HfO2 films were found to be amorphous.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324335
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Measurement of biogenic sulfur emissions from soils and vegetation: Application of dynamic enclosure methods with Natusch filter and GC/FPD analysis (1987)
    Springer
    Journal of atmospheric chemistry 5 (1987), S. 469-491 
    Details
    ISSN: 1573-0662
    Keywords: Biogenic sulfur ; biogenic emissions ; enclosure methods ; soils ; crops ; trees ; vegetation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract Emission rates of reduced sulfur gases from vegetation and soils were measured in various regions of the United States during the summer of 1985. The predominant sulfur gases emitted were hydrogen sulfide, carbonyl sulfide and dimethylsulfide. Typically, vegetative (forests, crops, etc.) emission fluxes varied between approximately 10 and 60 ng S m-2 min-1. Biogenic sulfur fluxes from mollisol and histisol soils averaged 15 and 217 ng S m-2 min-1, respectively. Salt water marsh fluxes with a geometric mean of 293 ng S m-2 min-1 were the highest measured. These biogenic sulfur fluxes are somewhat lower than those measured during the SURE study at some of the same sites. The natural sulfur emission fluxes reported herein together with those data included in the two accompanying manuscripts provide the basis for developing a national inventory of reduced sulfur emissions from soils, crops and trees. When combined these data also will provide a foundation for deriving uncertainty limits associated with these flux estimates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00113906
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    Paper (German National Licenses)
    Fulltext
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