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  • 1
    Electronic Resource
    Electronic Resource
    Kühlung eines Grases durch Tröpfchen-Verdampfung (1988)
    Springer
    Archive of applied mechanics 58 (1988), S. 205-214 
    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 Rectilinear flows of mixtures of a gas and droplets consisting of the same material are treated. If the velocity, the temperature and the vapour pressure of the droplets are different from the corresponding values of the gas, equalizing processes occur. Here especially, such cases are considered in which the temperature of the gas decreases. The influence of the various parameters on this effect is discussed for nitrogen.
    Notes: Übersicht Es werden Parallelströmungen von Mischungen aus einem Gas und Tröpfchen desselben Materials behandelt. Stimmen Geschwindigkeit, Temperatur und Dampfdruck der Tröpfchen im Ausgangszustand nicht mit den entsprechenden Gasgrößen überein, so finden Ausgleichsvorgänge zwischen beiden Phasen statt. Hier werden insbesondere solche Fälle untersucht, in denen die Gastemperatur abnimmt. Der Einfluß der verschiedenen Parameter auf diesen Effekt wird für Stickstoff diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00534331
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  • 2
    Electronic Resource
    Electronic Resource
    Approximate boundary conditions for the flow of a mixture of reacting gases (1995)
    Springer
    Acta mechanica 111 (1995), S. 161-170 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Slip boundary conditions are deduced for the Navier-Stokes equations describing the flow of a mixture of gases along a wall. Chemical reactions and changes of the internal energy at the wall are taken into account. A simplified approximation is introduced for a special case of the flow of a binary mixture consisting of atoms and molecules, which can be used as a model in treating the high-altitude flight of a space vehicle. The resulting conditions are compared with those given by other authors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01376927
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  • 3
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    K�hlung eines Grases durch Tr�pfchen-Verdampfung (1988)
    Springer
    Details
    Publication Date: 1988-01-01
    Print ISSN: 0020-1154
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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    PAPER CURRENT
  • 4
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    Approximate boundary conditions for the flow of a mixture of reacting gases (1995)
    Springer
    Details
    Publication Date: 1995-09-01
    Print ISSN: 0001-5970
    Electronic ISSN: 1619-6937
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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    PAPER CURRENT
  • 5
    Electronic Resource
    Electronic Resource
    Influence of hydrostatic pressure on l-glutamate dehydrogenase from the Antarctic fish Chaenocephalus aceratus (1999)
    Springer
    Marine biology 134 (1999), S. 631-636 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The influence of hydrostatic pressure on the stability and activity of glutamate dehydrogenase (GDH) from the liver of the Antarctic fish Chaenocephalus aceratus (Notothenioidei: Channichthyidae) has been investigated using the homologous bovine enzyme for comparison. At gradually increasing pressure, the fish GDH retains all activity up to 140 MPa, whereas in the same pressure range the bovine enzyme is slightly inactivated. The kinetics of pressure-induced inactivation of Antarctic GDH displays an exponentially decreasing residual activity as a function of the incubation time, whereas the bovine enzyme shows a complex pattern of behaviour in the first 20 min of incubation, attributable to the transient formation of aggregates. The coenzyme NAD increases the stability of both enzymes. The activation volume calculated for the reaction catalysed under pressure by fish GDH is higher than that of the bovine enzyme. These results indicate that the molecular properties of fish and bovine GDH are affected differently by hydrostatic pressure. A common mode of inactivation under extreme conditions of pressure and temperature of the cold-adapted Antarctic fish and mesophilic bovine GDH is deduced and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270050578
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  • 6
    Electronic Resource
    Electronic Resource
    Regeneration of roots, shoots and embryos: physiological, biochemical and molecular aspects (1997)
    Springer
    Biologia plantarum 39 (1997), S. 53-66 
    Details
    ISSN: 1573-8264
    Keywords: biotechnology ; callus ; micropropagation ; plant hormones ; tissue culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract When the proper stimuli are given, somatic plant cells may form adventitious embryos, roots or shoots. The three pathways of regeneration show apparent similarities. They consist of three analogous phases: 1) dedifferentiation (during which the tissue becomes competent to respond to the organogenic/embryogenic stimulus), 2) induction (during which cells become determined to form either a root, a shoot or an embryo), and 3) realization (outgrowth to an organ or an embryo). The first phase may involve a period of callus growth (indirect regeneration), but often cells present in the explant become competent without cell division or without cell division at a large scale (direct regeneration). In an explant, only very few cells show the organogenic/embryogenic response. In direct regeneration, the three regenerative pathways start from cells in different tissues. This is most obvious when the different types of regeneration occur in the same explant. The hormonal trigger for the dedifferentiation phase is a general one, probably auxin. During the induction phase, each pathway requires specific hormonal triggers. During the realization phase, hormones should be absent or at low concentration. The successive steps in the regeneration process coincide with events on the molecular and biochemical levels, but so far no coherent picture has emerged. In particular during the early stages of regeneration, research on these levels is hampered by a technical problem, viz., the very low proportion of cells that participate in the process of regeneration. New methods may overcome this problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1000304922507
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  • 7
    Electronic Resource
    Electronic Resource
    Ueber Benetzungsversuche an hydrophilen und hydrophoben Pulvern im System zweier miteinander nicht mischbarer Flüssigkeiten. I (1932)
    Springer
    Colloid & polymer science 61 (1932), S. 80-90 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Schlußbemerkung Die wenigen in dieser Arbeit aufgeführten Benetzungsversuche lassen bereits die Leistungs-fähigkeit der Methode zum Messen von Benetzungs-änderungen erkennen. Nicht nur die hydrophobierende Wirkung der Sammler, sondern auch der Wettbewerb der verschiedenartigsten modifizierenden Mittel und der Sammler um die Pulveroberffäche lassen sich aus dem Benetzungs-verlauf verfolgen. Mithin gibt die Methode, wertvolle Aufschlüsse über die Möglichkeiten der selektiven Benetzung von Pulvern, die für den Verlauf der Flotation von Bedeutung ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01428918
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  • 8
    Electronic Resource
    Electronic Resource
    Über Benetzungsversuche an hydrophilen und hydrophoben Pulvern im System zweier miteinander nicht mischbarer Flüssigkeiten. II (1933)
    Springer
    Colloid & polymer science 63 (1933), S. 327-338 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01422944
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  • 9
    Electronic Resource
    Electronic Resource
    Über Benetzungsversuche an hydrophilen und hydrophoben Pulvern im System zweier miteinander nicht mischbarer Flüssigkeiten. IV (1934)
    Springer
    Colloid & polymer science 68 (1934), S. 350-361 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01428628
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  • 10
    Electronic Resource
    Electronic Resource
    Die Berechnung von Schranken für den Wertebereich eines Polynoms in einem Intervall (1970)
    Springer
    Computing 6 (1970), S. 35-60 
    Details
    ISSN: 1436-5057
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Summary With the aid of an errorbound-arithmetic bounds are computer for the minimum and maximum of a polynomialP (x) in an interval [a, b]. The coefficients ofP (x) can be interval-numbers. To do this the zeros ofP′ (x) are enclosed in intervals whereP (x) is evaluated in a suitable manner. One gets the zeros ofP′ (x) by computing successively the zeros ofP (i−1) (x) untilP′ (x) beginning with a derivationP (i) (x) with,P (i) (x)≠o. Thereby one uses the fact that between two zeros ofP (l) (x) there is utmost one zero ofP (l−1) (x). The zeros are enclosed in intervals by means of the method of interval-halfing.
    Notes: Zusammenfassung Mit Hilfe einer Fehlerschranken-Arithmetik werden Schranken für das Minimum und Maximum eines PolynomsP(x), dessen Koeffizienten “Intervallzahlen” sein können, in einem Intervall [a, b] berechnet. Dazu werden die Nullstellen vonP′ (x) in Intervalle eingeschlossen, auf denenP (x) in geeigneter Weise ausgewertet wird. Die Nullstellen vonP′ (x) erhält man dadurch, daß man ausgehend von einer AbleitungP (i) (x) mitP (i) (x)≠o in [a, b] sukzessive die Nullstellen vonP (i−1) (x) bisP′ (x) bestimmt. Dabei bedient man sich der Tatsache, daß zwischen zwei Nullstellen vonP (l) (x) höchstens eine Nullstelle vonP (l−1) (x) liegt. Die Nullstellen werden jeweils mittels des Halbierungsverfahrens in Intervalle eingeschlossen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02241731
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