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  • 1985-1989  (4)
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Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Invertases of carnation petals. Partial purification, characterization and changes in activity during petal growth (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 71 (1987), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Carnation (Dianthus caryophyllus L. cv. White Sim) petals contained two distinct invertases (EC 3.2.1.26) based on chromatographic behavior on DEAE-cellulose. Both are soluble in 20 mM sodium phosphate buffer (pH 6.5) and exhibit acid pH optimum of 5.5. Extraction of a cell wall preparation from petals with 1 M NaCl released little additional activity. Furthermore, only traces of activity remained associated with the NaCl-extracted cell wall preparation. One of the soluble invertases, representing over 75% of the total activity, was partially purified by (NH4)2SO4 fractionation and sequential chromatography over diethylaminoethyl-cellulose, concanavalin-A sepharose and polyacrylamide P-200. The enzyme was purified 38-fold with a recovery of 12%. It had an apparent native molecular weight of 215 kDa. The partially purified invertase is a β-fructofuranosidase (EC 3.2.1.26) based on its specificity for sucrose. The Km for sucrose was 3.3 mM. Accumulation of reducing sugars and increased invertase activity during expansive petal growth indicates that sucrose is the major source of carbon for petal growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1987.tb02872.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    29 Si magic-angle NMR spectroscopy of low-temperature ordered plagioclase feldspars (1987)
    [s.l.] : Nature Publishing Group
    Nature 325 (1987), S. 236-238 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The spectra were obtained for homogeneous, ordered plagioclases which had been purified from natural metamorphic and slowly cooled igneous rocks and had almost all been characterized by transmission electron microscopy, electron microprobe analysis, X-ray powder diffraction and high-temperature ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/325236a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Bem and its convergence for Stationary Stokes problem in three dimensions (1987)
    Springer
    Acta mathematicae applicatae sinica 3 (1987), S. 318-327 
    Details
    ISSN: 1618-3932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract This paper discusses BEM for Stationary Stokes problem in three dimensions, studies its convergence and superconvergence, and gives the optimal error estimates as well.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02008370
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The water resources of lakes in China (1985)
    Springer
    GeoJournal 10 (1985), S. 151-155 
    Details
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Notes: Abstract This paper mainly deals with water resources of China's lakes. Lakes in China are mainly scattered over five drainage basins, with a total area of 73,580 km2 and a storage capacity of 746,000 million m3, in which the fresh water amounts to 221,000 million m3. The water resources of lakes are not evenly distributed in the regions. Their variations within a year and between years are great. So attention should be paid to the rational utilization of water resources and the problems in mangement need careful and skilful handling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00150733
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    Paper (German National Licenses)
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