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  • 1995-1999  (4)
  • morphology  (3)
  • Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.)  (1)
  • Collagenase
Source
Material
Years
  • 1995-1999  (4)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Identification of a spin-glass and a cluster-glass by Mössbauer measurements: Fe0.5Mn0.5TiO3 and Fe0.2Mg0.8TiO3 (1996)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 18 (1996), S. 263-268 
    Details
    ISSN: 0392-6737
    Keywords: Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) ; Critical-point effects, specific heats short-range order ; Antiferromagnetics ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Mössbauer measurements have been made on two kinds of spin-glass (SG) systems: one is the magnetically non-diluted mixed compound Fe0.5Mn0.5TiO3 with the SG-freezing temperatureT SG=21.5K, and the other is the diluted one Fe0.2Mg0.8TiO3 withT SG=6K. We have shown that the temperature variation of the Mössbauer spectrum of Fe0.2Mg0.8TiO3 above and around itsT SG is essentially different from that of Fe0.5Mn0.5TiO3: the former is typical of a cluster-glass and the latter of an ordinary spin-glass. The present work has clearly demonstrated that the Mössbauer spectroscopy is the most useful and unique technique to distinguish a cluster-glass from an ordinary spin-glass.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02458902
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Production of submicron-sized multihollow polymer particles having high transition temperatures by the stepwise alkali/acid method (1996)
    Springer
    Colloid & polymer science 274 (1996), S. 428-432 
    Details
    ISSN: 1435-1536
    Keywords: Multihollow particles ; emulsion polymerization ; morphology ; carboxyl group ; transition temperature
    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 Submicron-sized multihollow styrene-methacrylic acid (92.6/7.4, molar ratio) copolymer particles having high transition temperature above 100°C were produced by using the stepwise alkali/acid method proposed by the authors. The original particles were prepared by emulsion copolymerization of styrene and methacrylic acid. The effects of pH, temperature and time in the alkali treatment process as the first step on the multihollow structure were clarified under the same acid treatment conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00652464
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effect of molecular weight on the production of multi-hollow polymer particles by the alkalîcooling method (1997)
    Springer
    Colloid & polymer science 275 (1997), S. 82-85 
    Details
    ISSN: 1435-1536
    Keywords: Key words Multi-hollow particle ; emulsion polymerization ; morphology ; carboxyl group ; alkali swelling
    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 effects of molecular weight, particle diameter and cooling condition on the formation of multi-hollow structure formed within submicron-sized styrene-methacrylic acid copolymer particles by the “alkali/cooling method” proposed by the authors were examined and the formation mechanism was proposed. The original particles were produced by emulsion copolymerization in the presence of n-octyl mercaptan as a chain transfer agent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050055
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Production of submicron-sized multihollow polymer particles by alkali/cooling method (1996)
    Springer
    Colloid & polymer science 274 (1996), S. 801-804 
    Details
    ISSN: 1435-1536
    Keywords: Multihollow particles ; emulsion polymerization ; morphology ; carboxyl group ; alkali swelling
    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 Submicron-sized styrene-methacrylic acid copolymer particles, which were produced by emulsion copolymerization, were changed to those having multihollow structure by treating stepwise the emulsion as follows. First alkali treatment was carried out at higher temperature than the glass transition temperature and subsequently the emulsion was cooled by keeping it at room temperature. This was named “alkali/cooling method”. The effects of methacrylic acid content, pH, time and temperature in the alkali treatment on the formation of multihollow structure were clarified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00654677
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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