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  • 1
    Electronic Resource
    Electronic Resource
    Kinetics of phase separation in binary liquid mixtures (1980)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 84 (1980), S. 1991-1995 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100452a024
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  • 2
    Electronic Resource
    Electronic Resource
    Partial molar volumes of naphthalene and fluorene at infinite dilution in carbon dioxide near its critical point (1980)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 84 (1980), S. 229-230 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100439a024
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  • 3
    Electronic Resource
    Electronic Resource
    Determination of reaction volumes of hydrogen-bonding equilibriums by high-pressure near-infrared spectroscopy. 2. Self-association of phenol in tetrachloromethane up to 1 kbar (1980)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 84 (1980), S. 3004-3007 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100460a006
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  • 4
    Electronic Resource
    Electronic Resource
    Qualitative und quantitative Beschreibung der Erdbebenwirkung (1981)
    Springer
    Naturwissenschaften 68 (1981), S. 535-541 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Abstract During the last year, two earthquakes caused a great loss in human lives and much property damage in Algeria and Italy. These events raise the question of whether the engineering seismology methods currently in use are adequate. It can be shown that the seismic input parameters for planning and design of structures in earthquake-prone areas may be deduced from experience. The development of seismic response spectra on a statistical basis offers the possibility of making assumptions about future seismic loads taking the regional seismicity and the local underground situation into account.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00401661
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  • 5
    Electronic Resource
    Electronic Resource
    Chalcides and pnictides of group VIII transition metals: Far-infrared spectroscopic studies on compounds MX 2, MXY, and MY 2 with pyrite, marcasite, and arsenopyrite structure (1983)
    Springer
    Physics and chemistry of minerals 9 (1983), S. 109-114 
    Details
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract The far-infrared (FIR) spectra of pyrites, marcasites and loellingites, and arsenopyrites of the type MX 2, MY 2, and MXY with M=Fe, Co, Ru, Rh, Os, Ir X=S, Se, Te, and Y=P, As, and Sb have been studied, including group theoretical treatment of the phonon modes. The internal Y - Y and X - Y stretching modes, infrared (IR) allowed only in the case of the arsenopyrites, have been found to be in the range 440–490, 470–510, 450–490, 430–450 and 400–420 cm−1 for MP 2, MPS, MPSe, MAsS, and MSbS type compounds, respectively. From the obtained spectra intensity weighted mean phonon frequencies, i.e. central frequencies as defined by Plendl (1961), and mass weighted ones have been calculated and interpreted in terms of the strength of the MX and MY bonds, especially comparing 3d, 4d, and 5d transition metal compounds. Method of preparation and X-ray data of the chalcides and pnictides studied are also given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00308366
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis of GA20 glucosyl derivatives and the biological activity of some gibberellin conjugates (1984)
    Springer
    Journal of plant growth regulation 3 (1984), S. 207-215 
    Details
    ISSN: 1435-8107
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract GA20-13-0-glucoside (7a) and GA20 glucosyl ester (6a), potential endogenous conjugates in maize, were synthesized chemically. The biological activities of these compounds and of nine more GA glucosyl derivatives were determined using theZea mays dwarf- 5 seedling andOryza sativa cv. “Tan-ginbozu” assays. The relative bioactivities of the conjugates were also calculated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02042005
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  • 7
    Electronic Resource
    Electronic Resource
    Kompression und Expansion eines Gases in einem Zylinder als Störproblem (1981)
    Springer
    Acta mechanica 41 (1981), S. 157-184 
    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
    Description / Table of Contents: Summary The variation of state in a gas with constant mass inside a cylinder closed by a moving piston is considered. The piston velocity is assumed to be very small compared with the sound velocity in the gas; the piston stroke may be of the same order of magnitude as the length of the cylinder. The problem is governed by two time scales with different orders of magnitude; a cumulative effect due to local perturbations of the sound velocity has to be taken into account. Therefore, the problem has been solved by a simultaneous application of the method of multiple scaling and the analytical characteristics method. The quasistatic approximation is recovered from the condition that secular terms in the results for the second order flow quantities have to vanish. Then the second order solutions are uniquely determined without recourse to the third order equations. Multiply reflected shock waves are found by using Pfriem's formula.
    Notes: Zusammenfassung Die Zustandsänderung eines, in einem Zylinder eingeschlossenen Gases konstanter Masse, dessen Volumen durch einen bewegten Kolben verändert werden kann, wird untersucht. Die Kolbengeschwindigkeit wird als klein im Vergleich zur Schallgeschwindigkeit im Gas, der Kolbenhub als von der Größenordnung der Zylinderlänge angenommen. Die Fragestellung ist durch das gleichzeitige Auftreten zweier charakteristischer Zeiten verschiedener Größenordnung bestimmt; ein kumulativer Effekt, der durch die Störung der lokalen Schallgeschwindigkeit zustande kommt, muß berücksichtigt werden. Darum wurde das Problem durch simultane Anwendung der Methode der Mehrfachen Variablen und des analytischen Charakteristikenverfahrens gelöst. Dabei wurde die quasistatische Näherung aus der Bedingung bestimmt, daß in der zweiten Näherung die Ergebnisse der Zustandsgrößen keine Säkularterme enthalten dürfen. Die Lösungen zweiter Ordnung sind dann ohne Kenntnis der dritten Ordnung festgelegt. Zur Ermittlung mehrfach reflektierter Verdichtungsstöße wurde die Pfriemsche Formel verwendet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01177345
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  • 8
    Electronic Resource
    Electronic Resource
    Morphometric analysis of several intracellular events occurring during the vegetative life cycle of the unicellular algaPolytoma papillatum (1982)
    Springer
    Protoplasma 110 (1982), S. 185-195 
    Details
    ISSN: 1615-6102
    Keywords: Morphometry ; Life cycle ; Chondriome ; Nucleus ; Leucoplast ; Polytoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Quantitative electron microscopy of serial sections was used to study thePolytoma papillatum cell and some of its constituents (nucleus, chondriome, leucoplast) during its vegetative life cycle. The volumes of cells just entering into or passing through mitosis varied considerably and seemed to determine the number of subsequent division processes. Whereas a volumetric balance existed between the cell (100%) and the chondriome (8–9%) during the whole life cycle, there was a correlation between cell and nuclear volumes (8–10%) only during interphase growth and the onset of mitosis. At telophase the nucleus-to-cell-volume ratio was reduced to 2%, but gradually increased during cytokinesis (4.6% at early cytokinesis; 6.5% at late cytokinesis) until it reached the initial value again in newly formed daughter cells. The leucoplast-to-cell-volume ratio (10–26%) varied considerably without any recognizable dependence upon cell cycling. The mean short axis of mitochondrial profiles was proportional to the mean diameter (=thickness) of the mitochondria; the specific surface (outer membrane area per 100 μm3 mitochondrial volume), and the surface-to-volume ratio changed rhythmically. Changes in mitochondrial surface-to-volume ratio (Sc/Vc) were apparently correlated with changes in mitochondrial diameter (Dc). This relationship can be approximately described by the function Sc/Vc=4/Dc. Deviations of the surface-to-volume ratios of the nuclei from the surface-to-volume ratios of idealized spheres of equal size, indicating profound changes in nuclear shape, were found mainly during mitosis. Results were compared with those obtained from other morphometric investigations and discussed with regard to their functional meaning.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01283321
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  • 9
    Electronic Resource
    Electronic Resource
    Morphometric and chronobiological studies on the dynamics of the nuclear envelope and the nucleolus during mitosis of the colorless phytoflagellatePolytoma papillatum (1983)
    Springer
    Protoplasma 118 (1983), S. 19-35 
    Details
    ISSN: 1615-6102
    Keywords: Morphometry ; Mitosis ; Nuclear envelope ; Nucleolus ; Polytoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Quantitative electron microscopy of serial sections was used to study the cyclical changes in the nucleus ofPolytoma papillatum during its vegetative life cycle with special reference to mitosis. Particular attention was paid to the fluctuations in the nuclear volume, the nuclear envelope, and the nucleolus. Whereas a volumetric balance exists between the cell (100%) and the nucleus (ca. 8%) from early interphase to late anaphase, the nucleus-to-cell volume ratio is gradually reduced up to ca. 2% during telophase. This disproportion is gradually equalized during cytokinesis. The decrease in nuclear size is brought about by: (a) Constrictive abscission of hernia-like protrusions of the nucleus (“blebbing process”); (b) Ade novo production of membraneous septa across peripheral regions of the nucleus (“internal septation”). Just before or immediately after completion of this internal compartmentalization of the nucleus, the original envelope opens, releasing a portion of nucleoplasm into the cytoplasm (“membrane sluice process”); (c) Gaps in the nuclear envelope were occasionally found during telophase and may also permit nucleoplasm to leak out. Disorganization of the nucleolos, which is preceded by blending of its two major components (pars fibrosa, pars granulosa) starts at prophase via fragmentation. Subsequent dispersion continues until the nucleolus is more or less homogeneously distributed across the metaphase nucleus. During anaphase a good deal of the preexisting material recondenses around the separating chromosomes, but a considerable amount remains dispersed in the nucleoplasm and is extruded into the cytoplasm during nuclear volume reduction. Reorganization of the nucleolus occurs during telophase and early cytokinesis via further coalescence of the recondensed material and simultaneous reconstruction of the spatial separation of pars fibrosa and pars granulosa. Morphofunctional aspects of nucleo- and nucleologenesis are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284743
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  • 10
    Electronic Resource
    Electronic Resource
    Textilindustrie (1941)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 121 (1941), S. 281-290 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01388051
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