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  • 1995-1999
  • 1985-1989  (6)
  • 1987  (6)
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  • 1995-1999
  • 1985-1989  (6)
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  • 1
    Electronic Resource
    Electronic Resource
    Relationship of Water Content to Textural Characteristics, Water Activity, and Thermal Conductivity of Some Commercial Sausages (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 52 (1987), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Mechanical properties from cyclic low strain testing, texture profile parameters and thermal conductivity were evaluated for 7 types of commercial sausage products ranging in moisture content from 27.7% to 62.4% and aw from 0.857 to 0.993. Hardness, fracturability, the apparent moduli, stress al 20% compression, mechanical hysteresis loss, and strain energy all increased with decreasing moisture level, while springiness and the degree of elasticity decreased. Moisture had no significant effect on cohesiveness. A linear relationship was observed between the aw and the effective mole fraction of water in the brine, the exact nature of which depended on the thermal process which the product had received. Thermal conductivity decreased with decreasing moisture in a linear manner.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1987.tb14238.x
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of Mass Diffusivity of Simple Sugars in Water by the Rotating Disk Method (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 52 (1987), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The rotating disk method is shown to be an accurate method for determining the mass diffusivity of solid food components in liquid solutions. The diffusivities of sucrose and glucose in water were determined to be 0.50 and 0.66 (m2/sec × 109) at 25°C with activation energies of 36.3 and 31.6 kJ/g-mol, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1987.tb06655.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Relationships between processing, microstructure and properties of dense and reaction-bonded silicon nitride (1987)
    Springer
    Journal of materials science 22 (1987), S. 3041-3086 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstracts Some aspects of processing, microstructure and properties of the various types of silicon nitride are discussed. Special emphasis is placed on the relationships between powder properties, process conditions, densification and microstructure, as well as the interdependence between microstructure and properties. After summarizing the areas of crystal structure and thermodynamic properties, and processing of the different types of Si3N4, the state-of-the-art of dense and reaction-bonded silicon nitride is given. For both types the formation mechanisms and microstructure, relationships between powder properties, additives (in the case of dense Si3N4), process conditions, and densification and microstructure, as well as data and microstructural effects of various mechanical, thermal and thermo-mechanical properties, are outlined. Advanced processing techniques, such as sintering, gas-pressure sintering, post-sintering, and the different routes of hot-isostatic pressing (starting with powder compacts, reaction-bonded Si3N4 or pre-sintered Si3N4 and the resulting properties, are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01161167
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Nachsintern von reaktionsgebundenem Siliciumnitrid unter erhöhtem Stickstoff-DruckHerrn Prof. Dr. rer. nat. Wolfgang Bunk zum 60. Geburtstag gewidmet (1987)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 18 (1987), S. 285-291 
    Details
    ISSN: 0933-5137
    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: Post-sintering of Reaction-Bonded Silicon Nitride under Increased Nitrogen PressurePost-sintering of reaction-bonded silicon nitride (RBSN) under high nitrogen pressure is a promising technique for the production of dense Si3N4-materials. This processing technique involves two thermal-treatment steps, nitridation and sintering. Therefore, this technique results in a higher number of parameters, compared with the sintering of Si3N4-powder compacts.In this paper the influence of Si-powder characteristics (especially the particle size distribution) the type and amount of additives as well as the processing parameters sintering time and temperature on the densification behaviour and on the resulting properties of the post-sintered reaction-bonded Si3N4 (SRBSN), such as density and flexural strength, is discussed. Especially, for materials with low additive content a distinct correlation between the characteristics of the Si-starting powder and the properties of SRBSN could be found.
    Notes: Nachsintern von reaktionsgebundenem Siliciumnitrid (RBSN) unter hohem Stickstoffdruck stellt ein vielversprechendes Verfahren zur Herstellung dichter Si3N4-Materialien dar. Diese Herstellungsmethode beinhaltet zwei thermische Behandlungsschritte, die Nitridierung und Sinterung. Daher ergibt sich, verglichen mit der Sinterung von Si3N4-Pulverkörpern, eine größere Anzahl von Einflußparametern.In dieser Arbeit wird der Einfluß der Si-Pulvercharakteristika (speziell der Korngrößenverteilung) der Art und Menge der Additive sowie der Prozeßparameter Sinterdauer und Sintertemperatur auf das Verdichtungsverhalten und auf die resultierenden Eigenschaften des nachgesinterten reaktionsgesinterten Si3N4 (SRBSN), wie Dichte und Biegefestigkeit, diskutiert. Insbesondere bei Materialien mit geringer Additivkonzentration konnte eine deutliche Korrelation zwischen Pulvercharakteristika und den Eigenschaften des SRBSN gefunden werden.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19870180905
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    SiC-faserverstärkte Titanlegierung Ti 6 Al4 V. Einfluß von TiC- und TiN-Zwischenschichten auf die ReaktionszoneAuszugsweise vorgetragen auf dem Symposium „Haftung von Verbundwerkstoffen und Werkstoffverbunden“ der Deutschen Gesellschaft für Metallkunde, 12./13. Juni 1986 in Konstanz. Berichtsband ISBN 3-88355-109-0. (1987)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 18 (1987), S. 27-32 
    Details
    ISSN: 0933-5137
    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: SiC-Fiber Reinforced Ti 6 Al4 V Alloy: Effect of TiC and TiN Interlayers on the Reaction Zone.Processing and properties of SiC-fiber reinforced Ti 6 Al4 V alloys are briefly summarized. In order to avoid the degradation of the SiC-fibers caused by interfacial reactions, TiC and TiN interlayers were incorporated and their influence on the formation of the reaction zone was investigated. The reaction fiber-matrix was determinated by high temperature X-ray diffraction and Auger electron depth profiling.Coating with TiC and TiN cannot completely avoid fiber damage and interfacial reactions. However, due to the low reaction rate, at short process times (ca. 〈 1 h) the formation of titanium silicides can be prevented. Based on these results, the coating of the SiC-fibers by TiN, but especially TiC, gives positive aspects for further improving these composites.
    Notes: Es wird ein kurzer Überblick über Herstellung und Eigenschaften von SiC-faserverstärkten Ti 6 Al4 V-Verbundwerkstoffen gegeben. Um die durch Reaktionen im Grenzflächenbereich verursachte Schädigung der SiC-Fasern zu vermeiden, wurden TiC- und TiN-Schichten zwischen Faser und Matrix eingebracht und deren Einfluß auf die Ausbildung der Reaktionszone untersucht. Zum Nachweis der Reaktionen zwischen Faser und Matrix wurden die Röntgen-Hochtemperatur-Diffraktometrie und Auger-Elektronen-Tiefenprofilanalyse eingesetzt.Durch Aufbringen von TiC- und TiN-Zwischenschichten können der Faserangriff und die Grenzflächenreaktionen nicht vollständig verhindert werden. Bedingt durch die langsame Reaktionsgeschwindigkeit kann allerdings bei kurzen Haltezeiten (bis etwa 〈 1 h) die Ausbildung der schädlichen Titansilicide vermieden werden. Nach den bisher vorliegenden Ergebnissen liefert die Beschichtung der SiC-Fasern mit TiN, insbesondere aber mit TiC, positive Ansätze für die Weiterentwicklung dieser Verbundwerkstoffe.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19870180109
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Intravertebral vacuum phenomenon in multiple myeloma (1987)
    Springer
    Clinical rheumatology 6 (1987), S. 597-599 
    Details
    ISSN: 1434-9949
    Keywords: Multiple Myeloma ; Osteonecrosis ; Spine ; Radiotherapy ; Vacuum Phenomenon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Authors report one case of intravertebral vacuum phenomenon associated with a multiple myeloma. Initially, there occurred a collapse and a lysis of the L4 vertebral body. Two months later, after chemotherapy and cobalt-therapy, X-ray examination showed a vacuum cleft phenomenon within the body of L4 and a backward displacement of the L4 posterior wall. At the same time the patient complained of a cruralgia. Recovery occurred after decompression surgery. Histologic sampling of the L4 vertebral body revealed bone necrosis without any abnormal plasmocytosis. Authors draw attention to the neurological complications occurring in the course of the vertebral necrosis and to the fact that, even in case of multiple myeloma, the occurrence of a transverse vacuum cleft may result from osteonecrosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02330600
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    Paper (German National Licenses)
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