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  • 1
    Electronic Resource
    Electronic Resource
    Interaction between photoperiod, photosynthesis and ethylene formation in tomato plants (Lycopersicon esculentum cv. Ailsa Craig and ACC-oxidase antisense pTOM13) (1998)
    Copenhagen : Munksgaard International Publishers
    Physiologia plantarum 103 (1998), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Wild-type and ACC-oxidase antisense tomato plants (Lycopersicon esculentum Mill. cv. Ailsa Craig and pTOM13) were grown in environment-controlled rooms for 21 days under photoperiods of 8, 16 or 23.5 h at an irradiance of 300 µmol m−2 s−1. Photosynthetic pigments, photosynthesis, soluble carbohydrates, starch and ethylene were measured on the last fully expanded leaf. Increasing the photoperiod from 8 to 16 h stimulated all measured growth parameters in both cultivars. However, when the photoperiod was increased to 23.5 h, foliar yellowing and deformation were observed in the wild-type Ailsa Craig whereas no change was observed in pTOM13. It was not possible to relate these foliar changes in Ailsa Craig to destruction of the photosynthetic apparatus by excess carbohydrate levels in the leaves. Because pTOM13 was antisense to ACC-oxidase. it is proposed that yellowing and deformation in leaves of wild-type tomato plants grown under long photoperiods may be caused by stress ethylene induced by a long photoperiod.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1399-3054.1998.1030309.x
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  • 2
    Electronic Resource
    Electronic Resource
    The missing intercloud medium and spiral galaxies (1977)
    [s.l.] : Nature Publishing Group
    Nature 265 (1977), S. 123-124 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The lines of evidence pointing to the preponderance in the solar vicinity (within 1 kpc) of an intercloud medium having n = 10-2cm-3and T 106 K (which we will call "Phase III" gas) are as follows: (1) Steigman, Strittmatter, and Williams4, studying ultraviolet interstellar absorption lines, find no ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/265123a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    On the stereological estimation of reduced moment measures (1990)
    Springer
    Annals of the Institute of Statistical Mathematics 42 (1990), S. 445-461 
    Details
    ISSN: 1572-9052
    Keywords: Boolean model ; Hausdorff measures ; marked point processes ; measure decomposition ; moment measures ; stereology ; stochastic geometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Recently, a new set of fundamental stereological formulae based on isotropically oriented probes through fixed points have been derived, the so-called “nucleator” estimation principle (cf. Jensen and Gundersen (1989, J. Microsc., 153, 249–267)). In the present paper, it is shown how a model-based version of these formulae leads to stereological estimators of reduced moment measures of stationary and isotropic random sets in ℝ n .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00049301
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  • 4
    Electronic Resource
    Electronic Resource
    The influence of acetic acid on penicillin production (1981)
    Springer
    Applied microbiology and biotechnology 13 (1981), S. 29-33 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Fed-batch fermentations with Penicillum chrysogenum, strain S 3723, were fed with glucose as carbon source or with a mixture of glucose and acetic acid. When 20% of the carbon source was acetic acid, yields of penicillin-V were 25% higher than in fermentations where glucose was the only carbon source in the feed. The increased yield was due to higher specific productivity and/or cell mass. The effect was seen in fermentations where the carbon source was fed at a constant rate and the pH kept automatically at 6.5 by addition of inorganic acid or base, as well as in fermentations where pH controlled the addition of feed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00505338
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