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  • 1
    Electronic Resource
    Electronic Resource
    An X-ray and neutron diffraction study of Cs2Ti5O11 and Cs2Ti5O11.X2O, X = H, D (1987)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 43 (1987), S. 258-265 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S010876818709791X
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  • 2
    Electronic Resource
    Electronic Resource
    Event fairness and non-interleaving concurrency (1989)
    Springer
    Formal aspects of computing 1 (1989), S. 213-228 
    Details
    ISSN: 1433-299X
    Keywords: Fairness ; Concurrency fairness ; Models for concurrency ; Semantics ; Non-interleaving semantics ; Partial order semantics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Event fairness suitable for non-interleaving concurrency is proposed. Fairness is viewed with respect to concurrency, rather than non-determinism, in the sense that no concurrent component of the system should be delayed indefinitely. Shields' asynchronous transition systems and Mazurkiewicz's traces have been used; the model gives rise to a partial order. A class of generalised notions of (weak, strong and unconditional) event fairness relative to progress requirements is derived. The weakest fairness notion in this class is shown to coincide with maximality with respect to the partial order over traces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01887206
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  • 3
    Electronic Resource
    Electronic Resource
    Changes in ultrastructure of plasmodesmata during spermatogenesis in Chara vulgaris L. (1985)
    Springer
    Planta 166 (1985), S. 46-50 
    Details
    ISSN: 1432-2048
    Keywords: Chara ; Plasmodesma ; Spermatogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two types of plasmodesmata are found within an antheridium of Chara vulgaris: open plasmodesmata filled with electron-transparent cytoplasm, and plugged plasmodesmata, filled with an osmiophilic dense substance. Open plasmodesmata occur only between cells synchronized completely in respect of their advancement in cell-cycle progression or differentiation. Plugged plasmodesmata connect different types of cells or cells of the same type at various stages of the cell cycle. Open plasmodesmata may become plugged, and vice versa. These changes are connected with the limitation or extension of synchronization of cellular divisions and differentiation within the groups of cells in the antheridium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397384
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  • 4
    Electronic Resource
    Electronic Resource
    Application of thermal analysis for investigations of polymer powders for coatings (1987)
    Springer
    Journal of thermal analysis and calorimetry 32 (1987), S. 1801-1804 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Durch Fluidisationsverfahren erhaltene Polypropylenbeschichtungen wurden untersucht. Es wurde festgestellt, daß infolge der ähnlichen Bedingungen von thermischen Messungen und Plastpulverisierungsverfahren die Anwendung von thermischen Untersuchungsmethoden zu deren Charakterisierung viele nützliche Angaben liefern. Es konnten eindeutige Beziehungen zwischen thermischen Eigenschaften und Standardbeschichtigungseigenschaften gefunden werden.
    Abstract: Резюме Исследованы йолипро пиленовые покрытия, полученные методом д вижущегося слоя. Установлено, что прим енение термических м етодов анализа для характер истики таких покрытий, дает обширн ую полезную информац ию. Найдены важные корреляции ме жду термическими свойст вами и общепринятыми свойстами покрытий.
    Notes: Abstract Polypropylene coatings obtained by the fluidized bed method were investigated. It was proved that the application of thermal analysis methods for their characterization gave many useful data, as a consequence of the similar conditions of thermal measurements and plastics powder processing. Significant correlations were found between the thermal properties and the standard coating poperties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01913971
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  • 5
    Electronic Resource
    Electronic Resource
    Decline ofPotentillo albae-Quercetum phytocoenoses associated with the invasion ofCarpinus betulus (1988)
    Springer
    Plant ecology 75 (1988), S. 49-55 
    Details
    ISSN: 1573-5052
    Keywords: Association analysis ; Bialowieza primeval forest ; Community instability ; Indicator species
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The study area in the Bialowieza primeval forest-size 28000 m2, divided into quadrats of 100 m2, comprised two patches ofPotentillo albae-Quercetum as distinguished by phytosociological methods, and a fragment of an adjacent very largeTilio-Carpinetum stand. The directional variation in the distribution ofCarpinus betulus trunk diameter values in the southern part of the study area indicates invasion of this oak forest byCarpinus. This process probably started 1962–1968. The invasion ofCarpinus betulus caused considerable deterioration in light conditions of the ground layer, as deduced from a decrease in Ellenberg light index values. The phytosociological division of the study area correlates with variation in the spatial pattern ofCarpinus mean trunk diameter distribution. Quadrat groups were distinguished by association analysis. They were described phytosociologically using systematic group values for species, constituting the characteristic combination for thePotentillo albae-Quercetum. Areas occupied by still olderCarpinus individuals correspond to successive stages of oak forest regression. The deterioration of light conditions caused recession of thermo-and heliophilous oak-forest species and decline ofPotentillo albae-Quercetum phytocoenoses. However, this was not accompanied by the expansion pansion of species ofCarpinus forests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00044625
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  • 6
    Electronic Resource
    Electronic Resource
    Symplasmic isolation ofChara vulgaris antheridium and mechanisms regulating the process of spermatogenesis (1988)
    Springer
    Protoplasma 142 (1988), S. 137-146 
    Details
    ISSN: 1615-6102
    Keywords: Spermatogenesis ; symplasmic isolation ; DNA synthesis ; Chara
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The antheridium ofChara vulgaris L. is connected by plasmodesmata with the thallusvia a basal cell. Prior to the initiation of spermatozoid differentiation these plasmodesmata are spontaneously broken, resulting in symplasmic isolation of the antheridium. Premature plasmolytically evoked symplasmic isolation of the antheridium leads to a 2–4 fold reduction in the length of antheridial filaments and the elimination of 1–2 cell cycles from the first stage of spermatogenesis. Autoradiographic and cytophotometric studies have shown that, as a result of induced symplasmic isolation of the antheridium, endomitotic DNA synthesis was blocked both in the young manubria (after 24 hours) and in the capitular cells (after 48 hours). In the antheridial filaments DNA synthesis was inhibited together with either elimination of divisions and induction of spermatid differentiation or developmental block. We propose that breakage of plasmodesmata connecting the antheridium with the thallus is a signal which releases, in all antheridia, mechanisms that (i) block endomitotic DNA synthesis in the manubria, (ii) restrict the growth rate and the divisions of antheridial filament cells, and (iii) induce spermiogenesis in these antheridia in which the manubria attained the sufficient level of polyploidy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290870
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  • 7
    Electronic Resource
    Electronic Resource
    Changes in the occurrence and ultrastructure of plasmodesmata in antheridia ofChara vulgaris L. during different stages of spermatogenesis (1986)
    Springer
    Protoplasma 132 (1986), S. 179-188 
    Details
    ISSN: 1615-6102
    Keywords: Plasmodesmata ; Spermatogenesis ; Chara
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The following changes of plasmodesmatal connections occur during the development of antheridia inChara vulgaris: 1. Disappearance of plasmodesmata between shield cells, and between the shield cells and basal cell, leading to a decline in symplasmic transport around an antheridium, and determining its concentric or centrifugal course via centrally situated capitular cells. 2. Structural changes of simple plasmodesmata into complex connections between capitular cells and a basal cell, and between capitular cells and manubria. 3. Plugging and unplugging of plasmodesmata. Unplugged plasmodesmata are present between synchronously developing cells. Plugged plasmodesmata link cells of the same type which are at different phases of the cell cycle, or cells of different types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01276998
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  • 8
    Electronic Resource
    Electronic Resource
    Spatial distribution of species diversity indices and their correlation with plot size (1986)
    Springer
    Plant ecology 68 (1986), S. 99-102 
    Details
    ISSN: 1573-5052
    Keywords: Alpha diversity ; Evenness index ; Leucobryo-Pinetum ; Point diversity ; Shannon index ; Species diversity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In a physiognomically uniform Leucobryo-Pineteum phytocoenose the spatial pattern of point diversity was determined and the effect of quadrat size on the assessment of alpha diversity (in Whittaker's, 1977, sense) was analysed. In both cases the Shannon index of total species diversity and the evenness index were used to measure diversity. A contagious spatial pattern of point diversity and a high variation of point diversity values, as well as a strong non-linear dependence of H′ and J values on quadrat size, and also a decrease in H′ and J variation with an increase in quadrat size were found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00045060
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  • 9
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    New cesium titanate layer structures (1985)
    Elsevier
    Details
    Publication Date: 1985-07-01
    Print ISSN: 0022-4596
    Electronic ISSN: 1095-726X
    Topics: Chemistry and Pharmacology
    Published by Elsevier
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  • 10
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    Identifying characteristics of the fibrous cesium titanate Cs2Ti5O11 (1987)
    Elsevier
    Details
    Publication Date: 1987-08-01
    Print ISSN: 0022-4596
    Electronic ISSN: 1095-726X
    Topics: Chemistry and Pharmacology
    Published by Elsevier
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