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  • 66  (1)
  • Beta vulgaris  (1)
  • 1
    Electronic Resource
    Electronic Resource
    A time-of-flight study on the nanosecond laser induced etching of Cu with Cl2 at 308 nm (1988)
    Springer
    Applied physics 47 (1988), S. 183-192 
    Details
    ISSN: 1432-0630
    Keywords: 66 ; 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Chemical etching of Cu is studied using Cl2 and a ns pulsed UV laser at 308 nm. At Cl2 pressures in the range of 10−6–10−4mbar and a laser fluence up to 0.82 J/cm2 the velocity distributions of the ejected species are determined. CuCl and Cu3Cl3 are the main products. The time-of-flight spectra of these particles can be fitted with Maxwell-Boltzmann distributions at high temperatures viz. 1750〈T〈6000 K. Starting with a clean Cu sample the system evolves to a steady state situation in which a considerable amount of Cl has diffused into the bulk. The chlorinated Cu layer has a pronounced influence on the coupling of the laser beam into the substrate, thereby determining the amount of particles desorbed and their time-of-flight distributions. A model is presented to explain the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00618883
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Breeding sugar beets with globe-shaped roots: selection and agronomical performance (1988)
    Springer
    Euphytica 39 (1988), S. 37-44 
    Details
    ISSN: 1573-5060
    Keywords: Beta vulgaris ; sugar beet ; crosses with red table beet ; globe-shaped root ; dirt tare ; yield and quality characters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Losses and costs during and after harvesting of sugar beets can be reduced by modifying the traditional shape of the roots. Crosses have been made between sugar beets and globe-shaped red table beets, and selection for root shape and sugar content was carried out in the progenies. The root yield of the selected material is equal to that of commercial varieties. The sugar content is still too low and the contents of juice impurities too high, but further selection can improve the material in these respects. The amount of dirt tare can be 40–60% less than that of the control variety.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00043365
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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