ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Polymer and Materials Science  (184)
  • ASTROPHYSICS  (103)
  • 1980-1984  (287)
  • 1970-1974
  • 1980  (287)
Collection
Keywords
Publisher
Years
  • 1980-1984  (287)
  • 1970-1974
Year
  • 1
    facet.materialart.
    Unknown
    Hercules X-1 hard X-ray pulsations observed from HEAO 1 (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The 1.24-sec pulsations of Her X-1 in the energy range 13-75 keV have been analyzed in data obtained from the UCSD/MIT experiment on HEAO 1 during observations of the source on three dates in February 1978 and three in August 1978. Observational results are (1) the main pulse broadens somewhat with increasing energy; (2) the pulsation light curve undergoes pronounced changes at the leading edge of the main pulse from day to day; (3) spectral hardening within the main pulse is confirmed; (4) a 40-60 keV spectral feature in the spectrum is confirmed; (5) this feature is resolved, the pulse width broadening is greater than 20%, and its centroid varies with pulsation phase; and (6) the 13-75 keV spectrum does not noticeably vary from day to day, except for an overall intensity factor. Some implications of these results for the prevailing models of Her X-1 and the HZ Her-Her X-1 system are briefly discussed.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; vol. 240
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    Electronic Resource
    Electronic Resource
    Corrosion fatigue behaviour of nitrogen-implanted steel in water (1980)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 31 (1980), S. 783-789 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Schwingungskorrosionsverhalten von nitriertem Stahl in WasserDas Schwingungskorrosionsverhalten von nitriertem Stahl in neutralen Lösungen wurde unter Verwendung von schwingenden, einseitig eingespannten Proben (cantilever beam method) elektrochemisch (Ekorr/Zeit, Rp-Messung) und mittels Rasterelektronenmikroskopie untersucht.Die Korrosionsgeschwindigkeit in stagnierenden Flüssigkeiten ist bei dem nitrierten Stahl, unabhängig von der Stickstoffkonzentration, niedriger als bei unbehandeltem Stahl; die an der Oberfläche entstehenden Oxidschichten besitzen deutlich bessere Schutzwirkung.Bei einer zyklischen Belastung (25,4 kg/mm-2, 16,6 Hz) ist die Rißauslösung verzögert. Die Zeit bis zum Bruch ist beträchtlich kürzer als bei nicht nitrierten Proben (zumindest unter den verwendeten Versuchsbedingungen). Die Erhöhung der Rißausbreitungsgeschwindigkeit läßt sich erklären durch die Gefügeschädigungen, die durch das Nitrieren hervorgerufen werden. Die Bruchmorphologie wird ebenfalls erörtert.
    Notes: The corrosion fatigue behaviour of nitrogen implanted iron in neutral solutions has been investigated utilizing the oscillating cantilever beam method, by means of electrochemical (Ecorr vs. time plots, Rp measurements) and S. E. M. techniques.The calculated corrosion rate under stagnant conditions is lowered for the implanted iron at all nitrogen doses with respect to untreated iron. The surface oxide layers achieve enhanced protecting capacity.Consequently under a cyclic load of 25.4 kg mm-2, at a frequency of 16.6 Hz, cracks nucleation is delayed. The time to breaking of implanted specimens is considerably lower in our experimental conditions compared to untreated iron. The increase in the crack growth rate is consistent with the detrimental action of structural damage following implantation. The fracture morphology is also discussed.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19800311006
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Fortschritte bei der Polymerisation von Ethylen mit Ziegler-KatalysatorenHerrn Prof. Dr. R. Sammet zum 60. Geburtstag gewidmet (1980)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 89 (1980), S. 1-32 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Since 1966 highly active Ziegler catalysts for ethylene polymerization have been developed. These catalysts are more active by at least a factor of 20 than conventional Ziegler catalysts. With these catalysts it has been possible to design modern, second generation processes. In addition to the high activity, a suitable catalyst must allow to change the molecular weight and the molecular weight distribution, to copolymerize ethylene with α-olefins, and to get a polymer powder with a high bulk density. Examples are given to show how these highly active catalysts function.
    Notes: Seit 1966 ist es gelungen, hochaktive Ziegler-Katalysator-Systeme für die Ethylen-Polymerisation herzustellen, deren Aktivität um mehr als den Faktor 20 höher liegt als die klassischer Ziegler-Katalysatoren. Damit war es möglich, wesentlich einfachere Verfahren zur Herstellung von Polyethylen  -  sog. Verfahren der 2. Generation  -  zu entwickeln. Von einem Katalysator-System wird jedoch nicht nur eine hohe Aktivität gefordert. Es muß auch möglich sein, das mittlere Molekulargewicht in weiten Grenzen zu regeln, die Molekulargewichtsverteilung gezielt einzustellen, Copolymerisationen mit α-Olefinen durchzuführen und ein Polymerpulver zu erzeugen, mit dem hohe Feststoffgehalte im Reaktor gefahren werden können. Wie diese hochaktiven Katalysatoren arbeiten, wird beispielhaft dargestellt.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1980.050890101
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Smoke problems in buildings on fire: A TNO research project (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Fire and Materials 4 (1980), S. 192-200 
    Details
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The activities within the framework of TNO's research project on smoke problems in buildings on fire are reviewed. Two aspects will be dealt with extensively: smoke production and smoke movement. Furthermore, possible application of its finding will be discussed. The article reflects the state of the art at the end of 1978. In the meantime, the research programme has been concluded.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/fam.810040406
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Pfropfcopolymerisation auf strahlenchemisch erzeugte Peroxide im Polyamid (1980)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 31 (1980), S. 206-214 
    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: The formation of peroxides in polyamide under ionizing irradiation and the kinetics of peroxide decay are investigated. With several monomers the type and kinetics of modification reactions in peroxidized polyamide are determined. The influence of test parameters (irradiation and grafting conditions, type of monomer etc.) on kinetics and mechanism of graft polymerization are characterized.
    Notes: Die Bildung von Peroxiden des Polyamids bei Einwirkung ionisierender Strahlung und deren Zerfallskinetik werden untersucht. Mittels verschiedener Monomere werden die Möglichkeiten und die Kinetik von Modifizierungsreaktionen für das peroxidierte Polyamid bestimmt und der Einfluß der Versuchsparameter (Bestrahlungsbedingungen, Pfropfbedingungen, Art des Monomers u. a.) auf die Kinetik und den Mechanismus der Pfropfcopolymerisation charakterisiert.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1980.010310313
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Interfacial sythesis of polyphosphonate and polyphosphate ester. VII. Temperature effects and reaction loci in polycondensations of hydroquinone with phenylphosphonic dichloride and 4-methythiophenyl phosphorodichloridateTaken in part from the Ph.D thesis of L. L. Lambing, University of Missouri-Kansas City, Missouri, 1974. (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 18 (1980), S. 2155-2162 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polyphosphate and polyphosphonate esters of molecular weights 〉 10,000 were synthesized by base-promoted, liquid-vapor and liquid-liquid interfacial polycondensations of hydroquinone (HQ) with 4-methylthiophenyl phosphorodichloridate (MTPP) and phenylphosphonic dichloride (PPD). The barium hydroxide-initiated liquid-vapor polycondensation of PPD and HQ in the temperature range of 15-95°C shows that [η] increases with reaction temperature and unfractionated yields exhibit a maximum at about 45°C. The analogous liquid-vapor polycondensation of MTPP and HQ between 25 and 854C also shows a maximum yield at 45°C, whereas [η] decreases with increase in reaction temperature. The results are contrasted with temperature dependencies of base-catalyzed, liquid-liquid polycondensation of HQ with MTPP and PPD. A different insight is obtained by analyzing the temperature effects on fractionated products. The relative importance of degradative saponification reactions are ranked as attack on chain ester linkages 〉 phosphorus chloride reactant 〉 end groups of growing chains.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.170180711
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Formation of a cyclic oligomer by hydrogen transfer polymerization of acrylamideProofs received October 8, 1979 (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 18 (1980), S. 377-377 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.170180141
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Reaction of polyurethane foam with dry steam: Kinetics and mechanism of reactions (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 18 (1980), S. 541-557 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction of a polyether-based polyurethane foam with dry atmospheric pressure steam was examined as one approach to waste polyurethane foam recovery. Complete reaction at temperatures between 190 and 230°C yielded high-quality polyol, isomeric toluenediamines, and carbon dioxide as primary products. Kinetic analysis of toluenediamine yields versus time suggested the occurrence of a parallel first-order reaction scheme wherein urethane linkages react up to 50 times faster than urea linkages. The results derived from kinetic experiments and ancillary thermochemical and spectroscopic studies indicated that urethane linkages are broken by direct hydrolysis, whereas urea linkages undergo thermal dissociation to parent isocyanate and amine. Subsequent rapid hydrolysis of the isocyanate produced was necessary to obtain high yields of toluenediamine products. The rate of the slower reaction, dissociation of urea linkages, can be enhanced by a factor of 20 by the addition of trace amounts of sodium hydroxide to the foam.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.170180215
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Modified polymers from CIS-1,4-polyisoprene (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 18 (1980), S. 53-58 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.130180110
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Radiothermoluminescence as a method for the analysis of structural transitions in polymers (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 25 (1980), S. 963-966 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1980.070250524
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...