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  • 1980-1984  (5)
  • 1984  (5)
  • 1
    Electronic Resource
    Electronic Resource
    A limited-area normal mode initialization study (1984)
    Springer
    Meteorology and atmospheric physics 33 (1984), S. 39-47 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Es werden methodische numerische Experimente mit einem nichttrivialen 10-Flächen-Vorhersagemodell in einer zonalen Ebene ausgeführt, um damit die Wirksamkeit einer Normalmoden-Initialisierungsmethode für eine „Nestsituation ohne Rückkopplung” aufzuzeigen. Die Ergebnisse, dargestellt im Modenraum und im physikalischen Raum, weisen aus, daß die angewendete Methode im gewünschten Sinne erfolgreich ist und eine wesentliche Verbesserung (z.B. der Formierung des Vertikalbewegungsfeldes) vor allem für den Kürzestfristzeitraum nach sich ziehen kann.
    Notes: Summary Methodic numerical experiments with a non-trivial 10-level prediction model in a zonal plane are carried out in order to demonstrate the efficiency of a normal mode initialization method for an one-way nested situation. The results demonstrated in the mode space and the physical space support the approach to be promising, particularly in the early stage of the forecast when the vertical motion field is developing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265428
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Die Wirkung äu\erer und innerer Dämpfung auf die Stabilität des Prandtlschen Kragträgers unter mitgehender Momentenbelastung (1984)
    Springer
    Archive of applied mechanics 54 (1984), S. 205-219 
    Details
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary Using Hamilton's principle the non-linear boundary value problem for lateral buckling of a cantilever beam subjected to a follower time-independent bending moment is derived. The stability of the resulting state of equilibrium is studied. The influence of external and internal damping on the critical load is discussed in detail.
    Notes: übersicht über das Prinzip von Hamilton wird das nichtlineare Randwertproblem eines kippenden Kragträgers hergeleitet, der durch ein mitgehendes, zeitunabhängiges Endmoment belastet wird. Die Stabilität des sich einstellenden Gleichgewichtszustandes wird untersucht. Der Einflu\ sowohl äu\erer als auch innerer Dämpfung auf die kritische Last wird eingehend diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00555660
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Occurrence of the plant growth regulator jasmonic acid in plants (1984)
    Springer
    Journal of plant growth regulation 3 (1984), S. 1-8 
    Details
    ISSN: 1435-8107
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The natural occurrence of jasmonic acid and its methyl ester in plants has been studied using different methods such as GC, GC-MS, HPLC, radioimmunoassay, and bioassay. Jasmonic acid was detected in several Leguminosae plants and a number of species belonging to nine other Angiospermae families. Highest amounts occurred in fruit parts, especially the immature pericarp, but it was found also in flowers and vegetative plant parts, e.g. leaves, stems, and germs. Young apple fruits contain both jasmonic acid and methyl jasmonate, and in Douglas fir, the only Gymnospermae species studied, only the methyl ester could be detected. Jasmonic acid is discussed as an endogenous plant growth regulator widely distributed in higher plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041987
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Surface properties determine bioadhesive outcomes: Methods and results (1984)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 18 (1984), S. 337-355 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: This investigation developed experimental evidence for the influence of different surface energy states on tissue incorporation of biomedical materials. Implants of two smooth metals, each with three different surface energy states, were placed in the subdermal fascial plane of the backs of New Zealand White rabbits and were allowed healing times of 10 and 20 days. The implant surfaces were thoroughly characterized by physical-chemical criteria prior to surgical placement and again following removal from the tissue capsules generated by the host animals. Quantitative histopathologic analysis, using standard morphometric criteria, of the adjacent tissues revealed up to a threefold increase of fibroblastic-fibrocytic cells against the initially scrupulously cleaned, high-surface-energy materials. The cells were flattened and active, producing tenacious bonds through a thin pre-adsorbed protein-dominated “conditioning” film, that could be broken only by cohesive failure in the tissue itself. In contrast, the lower-surface-energy materials typical of standard dental implants were “walled off” by a cell-poor, nonadhesive capsule with a fibrous interface separated from a thicker “conditioning” film by a lipid-rich mucus zone. The advantages of proper surface treatment to favor the desired degree of biological adhesion are apparent.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820180404
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Remarks on the molecular mechanical calculations of functionalized hydrocarbonsPresented in part at the Molecular Mechanics Symposium, Indianapolis, Indiana, June 23-24, 1983. (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Computational Chemistry 5 (1984), S. 299-306 
    Details
    ISSN: 0192-8651
    Keywords: Computational Chemistry and Molecular Modeling ; Biochemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Computer Science
    Notes: Molecular mechanical calculations for hetero-substituted hydrocarbons present certain difficulties that are not encountered in dealing with hydrocarbons. Ways are proposed to overcome such difficulties, sometimes by two-step or iterative computation. The following topics are considered: fitting the force field by using data from studies in solution; ways to estimate atomic charges or, alternatively, bond moments; ways to account for field effects upon atomic charges and bond moments.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcc.540050404
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    Paper (German National Licenses)
    Fulltext
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