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  • PaleoseismologY  (1)
  • Polymer and Materials Science  (1)
  • membrane adhesion  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Instability of thin liquid films between membranes (1982)
    Springer
    Colloid & polymer science 260 (1982), S. 1137-1144 
    Details
    ISSN: 1435-1536
    Keywords: Liquid film stability ; membrane adhesion ; membrane fusion
    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: Abstract The conditions for instability of the thin liquid film between two plane-parallel membranes were derived taking into account the influence of the membrane tension, the membrane bending elasticity, the film viscosity and the disjoining pressure. It was shown that the liquid film could be unstable if the negative (attractive) disjoining pressure is predominant. The characteristic timeτ m of growth of perturbation due to thermal or other fluctuations of the membrane shape increases with increasing the film viscosity, the membrane tension and the membrane bending elasticity, and decreasing the film thickness and the negative disjoining pressure. It is of the order of 10−2÷103 sec. When the membranes approach each other at certain value of the average film thicknessh cr called critical, the fastest growing perturbations lead to formation of a liquid film with smaller (or zero) thickness. It was found that the critical thickness increases with increasing the negative disjoining pressure and the membrane area and decreasing the membrane tension and the bending elasticity having typical values of the order of 10−6÷10−5 cm. The case of a membrane approaching a solid plane was also considered. Excluding the small differences in numerical coefficients the results are similar to the case of two identical membranes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411236
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Zur Herstellung von ionenaustauschenden Polycaproamidfasern. Teil I. Anilinformaldehydharz enthaltende Polycaproamidfasern (1982)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 33 (1982), S. 31-33 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: A new method for preparing ion-exchanging polycaproamide fibres, based on the synthesis of aniline-formaldehyde resins within the bulk of fibres, has been established. The effect of various factors on the process of synthesis was investigated. Under optimum conditions, ion-exchanging polycaproamide fibres having an exchange capacity of 2.71 mgequ/g to 0.1 N HCl were obtained.
    Notes: Ein neues Verfahren zur Herstellung ionenaustauschender Polycaproamidfasern, das auf der Synthese von Anilinformaldehydharz in der Fasermasse beruht, wurde entwickelt. Der Einfluß verschiedener Faktoren auf den Verlauf der Synthesereaktion wurde untersucht. Unter optimalen Bedingungen wurden ionenaustauschende Polycaproamidfasern mit einer Austauschkapazität von 2,71 mgäqu./g gegenüber 0,1 n HCl erhalten.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1982.010330106
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  • 3
    facet.materialart.
    Unknown
    Paleoseismologic investigation of the fault that ruptured in the April 14, 1928, Chirpan earthquake (M 6.8), Southern Bulgaria (2007)
    Agu
    Details
    Publication Date: 2017-04-04
    Description: Seventy-five years after the destructive Chirpan earthquake of 14 April 1928, we conducted a paleoseismologic study of the causative fault combining a review of contemporary literature, geomorphology, geophysical prospecting, and trenching. We reidentified the fault scarp in the field, and mapped it over a distance of 12.5 km. Geophysical profiles and boreholes demonstrate that Chirpan scarp is the surface expression of a normal fault that was active throughout the Pleistocene and Holocene. In 2002, we excavated a paleoseismologic trench to study the faulting history. A narrow fault zone separates Plio-Pleistocene alluvial sand in the footwall from Holocene alluvial and colluvial silt in the hanging wall. The 1928 earthquake is recorded by 0.45 m vertical offset of the topsoil, in accordance with contemporary descriptions. We identified three colluvial wedge-like units in the hanging wall sediments next to the fault, evidencing at least three surface-rupturing paleoearthquakes since the Atlantic. Their timing could only be loosely constrained using pollen. The penultimate event had an offset of 0.40– 0.45 m and occurred after circa 2600 calibrated years before present (cal years B.P.). Event 3 displaced a Subboreal semiarid calcic soil 0.55–0.70 m between circa 5750 and 2600 cal years B.P. The fourth event had a minimal offset of 0.50–0.70 m and occurred between circa 8900 cal years B.P. and 4900 B.C., when the region was first settled. We obtain a Holocene fault slip rate of 0.22 ± 0.12 mm/yr and an average recurrence interval of 2350 ± 643 years for earthquakes comparable to or larger than the 1928 event.
    Description: Published
    Description: B01303
    Description: JCR Journal
    Description: reserved
    Keywords: Chirpan earthquake ; 1928 ; PaleoseismologY ; Bulgaria ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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