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  • 1
    Electronic Resource
    Electronic Resource
    Function of enzymes in wood decaying fungi (1971)
    Springer
    Archives of microbiology 77 (1971), S. 140-150 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. Mycelial extracts and culture filtrates of two species of Trametes have been assayed for various enzymatic activities. The tests performed after 3 and 10 days of mycelial growth on 3% malt extract have revealed that the spectra of external enzymes secreted by both strains differ markedly from their intracellular equivalents. A great part of the external isozyme bands, shown in disc electrophoresis and isoelectric focusing, have no equivalent acting within the cell. 2. These findings are discussed on the basis of special functional properties which have to be attributed to external enzymes. It is concluded that a great number of them are not simply internal enzymes which happen to be active outside the cell but that they are synthesized or at least modified especially for extracellular action under these special conditions. 3. A comparison between the two species of Trametes has shown that both produce enzymes with identical function. This indicates their strong relationship, though the electrophoretic mobility of most of the enzymes is not comparable. The consequences of these findings for chemical taxonomy are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00408606
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  • 2
    Electronic Resource
    Electronic Resource
    Beziehungen zwischen laccase- und peroxidaseartigen Isoenzymen von Basidiomyceten (1972)
    Springer
    Cellular and molecular life sciences 28 (1972), S. 896-897 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Phenoloxidases of 30 wood-rotting fungi were separated by isoelectric focusing. It turned out that apparent peroxidasic activity of the crude extracts of certain species is not necessarily atributable to peroxidases but to the special properties of certain laccase isoenzymes, which may be uninfluenced, inhibited, or activated by H2O2. These interactions differ in certain species for intra- and extracellular forms of the same isoenzyme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01924930
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Two Innate Releasing Mechanisms subserving the Same Motor Pattern System (1970)
    [s.l.] : Nature Publishing Group
    Nature 225 (1970), S. 750-751 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To decide between the two models, a number of special experiments were designed. In the course of 11 years, seventy different enemy dummies were shown to over 2,200 breeding pied flycatchers at a standard distance from their nest box (study areas in Berlin, around Frankfurt/Main, and near ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/225750a0
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  • 4
    Electronic Resource
    Electronic Resource
    Störungen bei der isoelektrischen Fokussierung von Proteinen durch anorganische Ionen (1971)
    Springer
    Naturwissenschaften 58 (1971), S. 55-55 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00620812
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  • 5
    Electronic Resource
    Electronic Resource
    Induction kinetics of delayed fluorescence of sun and shade leaves ofFagus sylvatica in the ms-range (1990)
    Springer
    Radiation and environmental biophysics 29 (1990), S. 119-128 
    Details
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Summary Induction kinetics of luminescence (=delayed chlorophyll fluorescence or delayed light emission) were measured with sun and shade leaves of a tall beech tree (Fagus sylvatica ‘pendula’, weeping beech). The kinetics detected in the ms-range are contrasted for the upper and the lower leaf side. The influence of the following parameters is demonstrated: time of dark-adaptation prior to the measurement, intensity of the excitation light and photoinhibitory treatment. The effects are discussed with respect to chlorophyll concentration, absorption of the excitation light, reabsorption of the luminescence and photosynthetic activity of the leaf tissue. It is shown that the luminescence signal and its kinetic are determined mainly by the properties of the mesophyll parenchyma facing the detector. Thus the more densely packed palisade parenchyma at the upper leaf side exhibits a lower luminescence and a slower kinetic than the spongy parenchyma at the lower leaf side, which is characterized by many aerial interspaces. Our study shows that luminescence kinetics can be applied to interpret the physiological state of a specific leaf tissue. They may serve as an indicator of disorders in the photosynthetic function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01210557
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  • 6
    Electronic Resource
    Electronic Resource
    Vergleichende chromatogrphische Untersuchungen an Arthropodengespinsten (1968)
    Springer
    Naturwissenschaften 55 (1968), S. 300-301 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00591720
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  • 7
    Electronic Resource
    Electronic Resource
    Book reviews (1984)
    Springer
    Theoretical and applied genetics 68 (1984), S. 454-454 
    Details
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254818
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  • 8
    Electronic Resource
    Electronic Resource
    Studies on conidial germination and initial growth of the grapevine powdery mildew Uncinula necator on artificial substrates (1989)
    Springer
    Applied microbiology and biotechnology 30 (1989), S. 415-421 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The requirements for conidial germination and formation of infection structures of the grapevine parasites Uncinula necator were studied on different substrates and supports. Direct contact with water or agar surfaces frequently caused bursting of conidia or inhibited formation of infection structures. Normal germination and initial growth depended on the presence of a dry surface covering a liquid substrate which could be reached by the penetration pegs. The water necessary for germination must be provided by a high air humidity whose optimal value (99.8%) was determined using closed slide microchambers in which air humidity was controlled by salt solutions. Even 99.6% humidity led to significant growth reduction, while at higher values deleterious condensation droplets formed around the spores. If liquid substrates are covered with thin (0.5 μm), waterproof polyacrylic membranes, germination appears normal. Formation of appressoria, successful penetration of the membrane by infection pegs and the development of functional haustoria indicate a lack of host specifity during the initial growth stage. although on water and on glucose media growth stopped after 1–2 weeks, this method seems to indicate a way to axenically culture this obligate parasite. The lack of host specificity at the level of host surface or tissue anatomy was corroborated by a successful culture of powdery mildew on grapevine callus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00296633
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