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  • Chemistry  (7)
  • SPACE RADIATION  (4)
  • Computer Systems
  • Scattering
  • 1985-1989  (11)
  • 1980-1984
  • 1975-1979
  • 1970-1974
  • 1925-1929
  • 1985  (11)
  • 1
    Electronic Resource
    Electronic Resource
    Modified affine law for the elastic and optical properties of low density polyethylene (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 186 (1985), S. 2649-2656 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A unified study of the anomalous mechanical properties and birefringence of low density polyethylene (LDPE) is attempted within the frame work of the rotating element model. The present paper investigates the validity of the affine transformation rule used in the Ward model and suggests a modified affine law which is based on the consideration that the units are only reoriented and, unlike the affine law, are not deformed due to the uniaxial stretching. The relationship between the angles made by the C-axis of the unit with the drawing direction in the undrawn state (θ) and the drawn state (θ), is deduced as sin θ = f(n) sin θ′. From the birefringence data of different polymers a two parameter relation of the form f (n) = exp [-(n - 1)α/β] is suggested. Using this new orientation function, the agreement of the predicted values of E0 and E90 for LDPE for the entire draw ratio range between temperatures of 60°C to -125°C, is quite satisfactory. An interesting feature is that the abrupt change in the values of the parameters α and β at two different temperatures may be associated with a phase transition of LDPE at an intermediate temperature.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1985.021861225
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  • 2
    Electronic Resource
    Electronic Resource
    Vinyl polymerization by carbon black, IV. Some properties of modified carbon black compared with its polymerization initiating activity (1985)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 129 (1985), S. 43-59 
    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: Alle Arten von Ruß enthalten große Anteile an ungepaarten Elektronen und organischen funktionellen Gruppen. Die Polymerisation wird wahrscheinlich durch die ungepaarten Elektronen auf der Oberfläche ausgelöst; die funktionellen Gruppen haben auf die auslösende Reaktion einen Promotor-Effekt. Alle Eigenschaften wie Textur, Geometrie, Größe der Oberfläche, pH der wäßrigen Aufschlämmung, Aschegehalt und elementare Zusammensetzung haben Einfluß auf die Polymerisation. Diese einschlägigen physikochemischen und Oberflächen-Eigenschaften von nicht modifiziertem und modifiziertem Ruß N 220 wurden im Hinblick auf die Polymerisation von N-Vinylcarbazol untersucht.
    Notes: All grades of carbon black contain large amounts of unpaired electrons and organic functional groups. Polymerization reaction is possibly initiated by the unpaired electrons on the surface; the functional groups have promotional effect on the initiation process. All the properties like texture, geometry, surface area, pH of the aqueous slurry, ash content, and elemental composition have effects on the polymerization reaction. These pertinent physicochemical and surface properties of unmodified and modified N 220 carbon black have been studied in relation to N-vinylcarbazole polymerization.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1985.051290104
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  • 3
    Electronic Resource
    Electronic Resource
    Vinyl polymerization by carbon black, VI. Physico-chemical characteristics of poly(N-vinylcarbazole) prepared by modified and unmodified carbon black (1985)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 134 (1985), S. 151-164 
    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: Die Initiatorwirksamkeit von unmodifiziertem und durch Vorbehandlung mit verschiedenen protischen und aprotischen Säuren modifiziertem Ruß N 220 wurde für die Polymerisation von N-Vinylcarbazol untersucht. Die physiko-chemischen Eigenschaften der mit diesen Initiatorsystemen erhaltenen Polymeren wurden durch IR-, Röntgen-, 1H-NMR- und 13C-NMR-Spektroskopie, Gelpermeationschromatographie und thermische Analysen untersucht. Unter bestimmten Bedingungen zeigt das entstehende Polymere eine teilweise Unlöslichkeit in Methylethylketon. Im Gegensatz zur üblichen Meinung ist dieses Verhalten nicht auf stereochemische Unterschiede zwischen den Polymereinheiten zurückzuführen, wie durch 13C-NMR-spektroskopische Analysen der in Methylethylketon unlöslichen Fraktion des Polymeren gezeigt wurde.
    Notes: The polymerization initiating activity of carbon black N220, unmodified as well as modified by pretreatment with various protonic and aprotonic acids has been examined in regards to N-vinylcarbazole polymerization. The physico-chemical characteristics of the polymer obtained by these catalyst systems have been investigated by I.R., X-ray, 1H-NMR, 13C-NMR, gel permeation chromatography and thermal analysis measurements. Under certain conditions the resultant polymer shows some partial insolubility in methylethylketone. Contrary to the usual belief, this is not due to any stereochemical difference between the polymeric entities as observed by 13C-NMR spectrum analysis of the methylethylketone insoluble fraction of the polymer.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1985.051340110
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  • 4
    Electronic Resource
    Electronic Resource
    Nuclear magnetic resonance IIIFor Part II see K. M. Biswas, R. N. Dhara and H. Mallik, Indian J. Chem. in press.-13C NMR spectral studies on substituted indoles (1985)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 23 (1985), S. 218-220 
    Details
    ISSN: 0749-1581
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 13C signal assignments of 3-ethyl-1-methylindole (1), 1-methyl-3-phenylindole (3), 1,3-dimethyl-2-phenylindole (5), 1-methyl-2,3-diphenylindole (10), 1,5-dimethyl-2,3-diphenylindole (12), 7-methoxy-2,3-diphenylindole (13), 7-methoxy-4-methyl-2,3-diphenylindole (14) and 1-(7-methoxy-4-methyl-2,3-diphenyl-6-indolyl)-1-(7-methoxy-2,3-diphenyl-4-indolyl)methane (15) are reported. Contrary to an earlier report on monophenylindoles, the para carbons of the phenyl groups of 3, 5, 10 and 12-15 resonate at lower frequencies than their ortho carbons. The methoxy carbon at position 7 in 15 absorbs at a higher frequency than other similar carbons in 13-15 owing to steric inhibition to resonance.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260230319
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  • 5
    Electronic Resource
    Electronic Resource
    Nitrosyl Rhenium Complexes: Thiocyanato Derivatives (1985)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 526 (1985), S. 179-185 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Rhenium-Nitrosyl-Komplexe: Thiocyanato-DerivateSchmelzen von K2[Re(NO)Cl5] mit KSCN ergibt [Re(NO)(SCN)5]2-, das als freie Säure bzw. in Form der K+-, Na+-, NMe4+-, Pb2+-, Hg2+-, phenH+- und dipyH+-Salze isoliert werden kann. Eine Verbindung mit der Zusammensetzung Hg2[Re(NO)(SCN)7] wurde ebenfalls dargestellt. [Re(NO)Cl(SCN)4]2- wurde bei der Reaktion von H2[Re(NO)(SCN)5] mit HCl in wäßrigem Medium erhalten und als NMe4+-Salz isoliert. In wäßrigem Medium reagiert Re(NO)Cl3 mit KSCN unter Bildung von [Re(NO)Cl2(SCN)3]2-, das als phenH+- und dipyH+-Salz isoliert wurde. Die Komplexe wurden durch Elementaranalyse, spektroskopisch (UV-VIS, IR), magnetisch und durch Leitfähigkeitsmessungen charakterisiert. Strukturen für die Verbindungen werden vorgeschlagen.
    Notes: Fusion of K2[Re(NO)Cl5] with KSCN produces the ion [Re(NO)(SCN)5]2- which has been isolated as free acid and K+, Na+, NMe4+, Pb2+, Hg2+, phen H+ and dipyH+ salts. A salt of composition Hg2[Re(NO)(SCN)7] has also been prepared. The species [Re(NO)Cl(SCN)4]2- has been obtained from the reaction of H2[Re(NO)(SCN)5] with HCl in aqueous medium and its NMe4+ salt has been isolated. Hydrated Re(NO)Cl3 reacts with KSCN in aqueous medium to produce the ion [Re(NO)Cl2(SCN)3]2- which has been isolated as its phenH+ and dipyH+ salts. The complexes have been characterized through elemental analyses, spectral (u.v., vis., i.r.) properties, magnetic and conductance data. The structures of all those compounds have been proposed.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19855260722
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  • 6
    Electronic Resource
    Electronic Resource
    Diffraction characteristics of paracrystalline linear molecular structures with multimodal coordination statistics (1985)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 6 (1985), S. 353-359 
    Details
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1985.030060511
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  • 7
    Electronic Resource
    Electronic Resource
    Hole transport property of poly(2-N-carbazolylethyl methacrylate) (1985)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 23 (1985), S. 151-154 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1985.130230306
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  • 8
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    Relative abundances of sub-iron to iron nuclei in low energy (50-250 MeV/N) cosmic rays as observed in the Skylab experiment (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A Lexan polycarbonate detector exposed on the exterior of Skylab-3 for 73 days during a solar quiet period was used to study the relative abundances of calcium to nickel ions in low energy cosmic rays of 50 to 250 MeV/N. The method of charge identification is based on the measurement of conelength (L) and residual range (R) of these particles in various Lexan sheets. Since more than one cone (sometimes as many as five) is observed and is measured, the charge accuracy becomes precise and accurate. The ratio of (calcium to manganese) to (iron and cobalt) obtained at three energy intervals of 50 to 80, 80 to 150, 150 to 250 and 50 to 250 MeV/N are 7.6 plus or minus 3.8, 2.7 plus or minus 0.8, 1.4 plus or minus 0.6 and 3.3 plus or minus 0.7 respectively. These data thus indicate a large increase of this ratio with decreasing energy. The origin of this strong energy dependence is not understood at present.
    Keywords: SPACE RADIATION
    Type: OG-4.1-4 , 19th Intern. Cosmic Ray Conf - Vol. 2; p 12-15; NASA-CP-2376-VOL-2
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    NASA TECHNICAL REPORTS
  • 9
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    Detector calibration of the Indian cosmic ray experiment (IONS) in Space-Shuttle Spacelab-13 (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: In the Indian cosmic ray experiment (IONS) in Spacelab-3 the intention is to study nuclei up to iron in low energy cosmic rays, using CR-39 (DOP) detectors. CR-39 (DOP) was exposed to He4, C12, O16, Ne20, Si28, Ar40, Cr52 and Fe56 accelerated beams from various accelerator facilities available around the world. Different beam energies and exposure angles were used. From these exposures, the charge resolution and energy resolution for the detector in the region of interest were studied. The effect of pre-annealing and depth on the response of our detector was studied. For isotopic resolution, exposed the detector samples were exposed to Ne2O and Ne22 accelerated beams. Samples of CR-39 (DOP) exposed to different accelerated heavy ions were kept in the detector module to take into account the effect of ambient conditions on detector response during the flight.
    Keywords: SPACE RADIATION
    Type: SH-9.1-2 , 19th Intern. Cosmic Ray Conf - Vol. 5; p 458-461; NASA-CP-2376-VOL-5
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  • 10
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    Possible origin of the anomalous component of cosmic rays (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The possible origin of the anomalous cosmic rays (ACR) are studied in terms of stellar wind injection from O type stars and their acceleration in shock fronts of SNR's. It is assumed that a fraction of heavy ions will encounter interstellar shock fronts of SNR's and these are accelerated to about 5 to 100 MeV/N and give rise to ACR's. Typically these ions would travel a distance of the order of a few 1000 pc. Therefore it is estimated that O type stars in a volume of radius of a few Kpc around the solar system are contributing to the intensity of ACR in the local ISM. From observational data, the intensity of ACR in the local ISM is estimated. It is suggested that these ACR ions enter the solar system along the solar dipole field lines connected to the interplanetary magnetic field lines.
    Keywords: SPACE RADIATION
    Type: SH-4.6-7 , 19th Intern. Cosmic Ray Conf - Vol. 5; p 184; NASA-CP-2376-VOL-5
    Format: application/pdf
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