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)
  • GEOPHYSICS  (100)
  • 1980-1984  (387)
  • 1980  (387)
  • 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
    facet.materialart.
    Unknown
    Rocket observations at the northern edge of the eastward electrojet (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The paper discusses a Nike-Tomahawk rocket launched north over quiet, late evening auroral arcs in March 1975. A northward magnetic disturbance was observed on the ground under the rocket trajectory; south of the arcs the northward electric field was 60 mV/m, indicating strong westward plasma flow. An eastward electrojet current layer was penetrated in the upward flight, and precipitating electrons were observed over each arc. Using the observed electron flux and a model of the ionosphere, the Hall and Pedersen conductivities were calculated which were used to compute the eastward and northward components of the horizontal ionospheric currents. The joule power decreased abruptly in the auroral arcs, as the precipitating electron power increased; the total dissipated power was the same inside the arcs, between them and southward. North of the aurora the electric field and dissipated power remained low; field-aligned currents carried by the observed electrons were about a factor of 3 lower than those inferred from the magnetic field measurements.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 85; July 1
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    Comparative rocket observations of ionospheric electric fields in the auroral oval (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The ion drift technique of measuring ionospheric electric fields is compared to two other simultaneous measurements. Rocket measurements in the evening auroral oval are checked against a dual probe, also in situ, and the ground based STARE auroral radar. The technique is explained thoroughly as well as tested for its dependence on mass. Two evening auroral oval conditions were observed from Andoya, Norway in January and February 1977. The first flight, 18:1005, measured electric fields over a quiet pre-midnight discrete arc. An interesting plasma convection reversal was observed poleward of the arc. The subsequent 18:1004, samples a breakup phase aurora nearer local midnight.
    Keywords: GEOPHYSICS
    Type: Space Science Instrumentation; 5; June 198
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 4
    Electronic Resource
    Electronic Resource
    Experimental characterization of poly(hydroxyalkyl-L-glutamine) conformations in aqueous calcium chloride and sodium perchlorate solutions (1980)
    New York : Wiley-Blackwell
    Biopolymers 19 (1980), S. 1923-1941 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Poly(hydroxyalkyl-L-glutamine) (alkyl = ethyl, propyl, butyl) solutions have been studied by CD as functions of temperature and activity of calcium chloride and sodium perchlorate. Helical content is altered by changes in salt activity and temperature. The helicity of poly(hydroxybutyl-L-glutamine) and poly(hydroxypropyl-L-glutamine) falls to zero in a monotonic fashion with increasing calcium chloride activity. A nonzero helicity reappears at activities in excess of 5-50 mol kg-1. Poly(hydroxypropyl-L-glutamine) is much more sensitive to calcium chloride than is poly(hydroxybutyl-L-glutamine), and both polypeptides are more sensitive to calcium chloride than are typical proteins. Markedly different behavior is observed with sodium perchlorate. This salt acts as a helix stabilizer at low activities but becomes a destabilizer at activities higher than 0.3-1.0 mol kg-1. In this respect the effect of sodium perchlorate on nonionic poly(hydroxyalkyl-L-glutamines) resembles that seen with cationic poly(L-lysine) and poly(L-arginine). Helix stabilization at low sodium perchlorate activity is moderate for poly(hydroxybutyl-L-glutamine) and large for poly(hydroxypropyl-L-glutamine) and poly(hydroxyethyl-L-glutamine).
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1980.360191102
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    The solid-state polymerization of some bis(arylsulfonate) esters of 2,4-hexadiyne-1,6-diol (1980)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 181 (1980), S. 453-467 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Existing evidence suggests that the solid-state polymerization of disubstituted diacetylenes is controlled by (a) the packing of the monomeric units in the crystal lattice, and (b) the elastic strain which is present in partially polymerized crystals. To investigate these ideas further, a number of closely related bis(arylsulfonate) derivatives of 2,4-hexadiyne-1,6-diol, analogous materials to the extensively investigated bis(p-toluenesulfonate) ester of this diol, have been synthesized, and their solid-state reactivity studied. Topochemical polymerization was observed only for those compounds with benzenesulfonate and p-methoxybenzenesulfonate substituents. In the case of the latter, structurally different reactive and unreactive crystalline modifications were obtained. Polymerization kinetics for the reactive modification differ strikingly from those of the p-toluenesulfonate compound, despite the fact that the initial elastic strains in the two materials appear comparable.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1980.021810213
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    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
  • 7
    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
  • 8
    Electronic Resource
    Electronic Resource
    Trans-gauche rotational isomers in partially oriented poly(ethylene terephthalate) fibersIssued as NRCC #18317. (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 25 (1980), S. 1505-1507 
    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: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1980.070250723
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Physicochemical processes occurring during the formation of cellulose diacetate membranes. Research of criteria for optimizing membrane performance. V. Cellulose diacetate-acetone-water-inorganic salt casting solutions (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 25 (1980), S. 1883-1913 
    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
    Notes: Consideration was given to the effects of casting conditions upon the performance and structure of membranes prepared from CA-acetone-water-inorganic salt solutions. Treating casting solutions as polymer-solvent-nonsolvent ternary systems, the data on equilibrium phase separation conditions were plotted in a triangular diagram for solutions containing Al(NO3)3, KSCN, Mg(ClO4)2 or no additive. Measurements of casting solution viscosity, membrane thickness, freezing and nonfreezing water contents were used to supplement flux and retention data of membranes made by varying the inorganic salt and holding time in a systematic way. With the aid of scanning and transmission electron microscopy, it was concluded that membranes may consist of one, two, three, or four layers. The data and correlations obtained allow us to propose a mechanism of formation for each of these layers.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1980.070250908
    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...