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  • Chemistry  (132)
  • Inorganic Chemistry  (14)
  • KTB  (4)
  • Magnetism
  • 1990-1994  (136)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 25 (1991), S. viii 
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
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    The Project Management ot the Continental Deep Drilling Programme of the Federal Rep. of Germany in the Geological Survey of Lower Saxony
    In:  Professional Paper, KTB Pilot Hole, Results of Geoscientific Investigation in the KTB Field Laboratory 0-4000,1 m, Hannover, The Project Management ot the Continental Deep Drilling Programme of the Federal Rep. of Germany in the Geological Survey of Lower Saxony, vol. 4, no. 16, pp. D1-D29, (ISBN 1-86239-165-3, vi + 330 pp.)
    Publication Date: 1990
    Keywords: KTB ; Laboratory measurements ; Physical properties of rocks ; Review article ; Bucker ; Buecker
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  • 3
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    The Project Management of the Continental Deep Drilling Programme of the Federal Republic of Germany in the Geological Survey of Lower Saxony
    In:  Bull., Open-File Rept., KTB Pilot Hole, Results of Geoscientific Investigation in the KTB Field Laboratory 0-4000,1 m, Hannover, The Project Management of the Continental Deep Drilling Programme of the Federal Republic of Germany in the Geological Survey of Lower Saxony, vol. 10, no. 16, pp. B1-B55, (ISBN 0080419208)
    Publication Date: 1990
    Keywords: KTB ; Review article ; Geol. aspects ; Mueller ; Muller ; Rohr
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  • 4
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    The Project Management ot the Continental Deep Drilling Programme of the Federal Rep. of Germany in the Geological of Lower Saxony
    In:  Professional Paper, Open-File Rept., KTB Pilot Hole, Results of Geoscientific Investigation in the KTB Field Laboratory 0-4000,1 m, Hannover, The Project Management ot the Continental Deep Drilling Programme of the Federal Rep. of Germany in the Geological of Lower Saxony, vol. 65, no. 2, pp. F1-F19, (ISBN 0080419208)
    Publication Date: 1990
    Keywords: Stress ; Stress measurements ; Borehole geophys. ; KTB
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  • 5
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    The Project Management ot the Continental Deep Drilling Programme of the Federal Rep. of Germany in the Geological of Lower Saxony
    In:  Professional Paper, Open-File Rept., KTB Pilot Hole, Results of Geoscientific Investigation in the KTB Field Laboratory 0-4000,1 m, Hannover, The Project Management ot the Continental Deep Drilling Programme of the Federal Rep. of Germany in the Geological of Lower Saxony, vol. 22, no. 16, pp. G1-G12, (ISBN 0080419208)
    Publication Date: 1990
    Keywords: KTB ; Stress ; cracks and fractures (.NE. fracturing) ; Laboratory measurements ; Buecker ; Bucker ; Roeckel ; Rockel
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  • 6
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 334 (1992), S. 49-52 
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: HPLC-Electrochemical Detector with a Carbon Fiber Working ElectrodeThe paper describes an electrochemical detector with carbon fibers as the working electrode placed perpendicularly to the flow direction. The detector performance was characterized by the detection limit for selected phenolic compounds, reproducibility, linearity and the signal dependence on the flow rate. An electrochemical in situ pretreatment of the working electrode improves sensitivity and long term stability.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 8
    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: Aluminizing of steels for protection against high-temperature sulphidation in liquid sulphur and in H2S-containing atmospheresThe aluminizing of a structural steel (Werkst. Nr. 1.7335), a stainless steel (1.4306) and a heat resistant steel (1.4876) has been optimized with respect to the maximal attainable aluminum content, the freedom from porosity and cracks and the homogeneity of phases in the aluminized layer. The nickel was found to be predominantly important, as together with Kirkendall porosity it governs the thermal stability of aluminized layers during corrosion and oxidation.High-temperature corrosion was examined in liquid sulphur, in H2/H2S- and in H2/H2S/H2O-atmospheres. In liquid sulphur the aluminized layer of austenitic steels fails by the occurrence of a periodically alternating sulphidation reaction which destroys the protective layer at 495°C. In gaseous mixtures the stability depends on the quality of an Al2O3-film on the aluminized layer which inturn is governed by the chemical composition of the aluminized layer. Beyond 900°C the transport of sulphur through Al2O3 occurs by simultaneous grain boundary-(“short circuit-”) and volume diffusion.
    Notes: Die Alitierung je eines Baustahles (Werkst. Nr. 1.7335), eines rostfreien Stahles (1.4306) und eines hitzebeständigen Stahles (1.4876) wurde hinsichtlich des maximal erreichbaren Aluminiumgehaltes, der Freiheit von Poren und Rissen und der Homogenität der Schutzschicht optimiert. Als wesentliche Einflußgröße für die Schutzschichtbildung wurde der Nickelgehalt festgestellt, von der, gemeinsam mit der Kirkendallporosität, die thermische Stabilität bei korrosiver und oxidativer Belastung entscheidend abhängt.Die Hochtemperaturkorrosion wurde in flüssigem Schwefel, in H2/H2S- und in H2/H2S/H2O-Gemischen untersucht. In flüssigem Schwefel versagt die Alitierschicht der autenitischen Stähle durch eine periodisch alternierende Sulfidierungsreaktion, die die Schutzschicht bei 495°C zerstört. In den Gasgemischen hängt die Beständigkeit von der Schutzwirkung des Al2O3-Filmes auf der Alitierschicht ab, dessen Qualität durch die chemische Zusammensetzung der Schicht bedingt ist. Oberhalb 900°C wurde im übrigen für den Schwefeltransport im Al2O3 neben der Korngrenzen-(“Kurzschluß-”) Diffusion auch Volumendiffusion nachgewiesen.
    Additional Material: 25 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 44 (1993), S. 402-409 
    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: CORIS™: Corrosion data baseIn this paper the main component of the CORIS system, the corrosion database, is presented. The database contains corrosion facts for metallic materials with respect to all important corrosion parameters. E/R-Models (Entity-Relationship-models) were used for structuring the corrosion knowledge, and the functionality of the system is described in detail from the conceptual and the practical point of view. The system offers the possibility to enter own corrosion data as well as to evaluate stored data. The graphical interactive user interface was designed for simple use.
    Notes: In der vorliegenden Arbeit wird die Kernkomponente des Systems CORIS, die Korrosionsdatenbank, vorgestellt. In ihr sind Korrosionsfakten unter Berücksichtigung aller relevanten Parameter abgelegt. Es wird die dem System zugrunde liegende Korrosionsstruktur mit Hilfe von E/R-Modellen (Entity-Relationship-Modelle) erläutert und ein detaillierter Einblick in die Funktionalität und das Erscheinungsbild gegeben. Das System bietet dem Anwender die Möglichkeit, sowohl eigene Korrosionserfahrungen abzulegen als auch unter Eingabe von Suchbedingungen vorhandenes Wissen zu recherchieren. Die graphisch interaktive Benutzeroberfläche ist auch für ungeübte DV-Nutzer leicht zu bedienen.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
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  • 10
    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: Microbial deterioration of materials - simulation, case histories, and countermeasures for inorganic nonmetallic materials: Biodeterioration processes on inorganic materials and means of countermeasuresBiodeterioration processes on inorganic materials such as natural stone, concrete, or glass can be subdivided into biogeochemical and biogeophysiological mechanisms according to their damage characteristics. In connection with the partial acidification and dissolving of components, biocorrosion as a result of biogenic release of inorganic and organic acids, as well as the biogenic oxidation of mineral forming cations, a certain weakening in the structure of the respective material can occur. The formation of biofilms on the surfaces of the inorganic materials impairs not only the aesthetical appearance of an object but also causes alterations in its humidity and temperature behaviour. In addition, due to the shrinking and swelling effects of biofilms, mechanical pressure to the mineral unit can occur (bioerosion, bioabrasion). Location and environmental factors which could lead to specific, biogenically determined weathering phenomena on these materials will be presented and elucidated. For controlling biodeterioration processes, the development and selection of environmentally-friendly, yet effective, inorganic and organic biocidal additives for stoneprotection agents as well as the use of gas (e.g. ethylene oxide) in their far-reaching significance for future material research will be presented here.
    Notes: Biodeteriorationsprozesse an anorganischen Werkstoffen wie Naturstein, Beton oder Glas können in ihren Schädigungsweisen nach biogeochemischen und biogeophysikalischen Mechanismen unterteilt werden. Im Zusammenhang mit der partiellen Ätzung und Lösung von Bestandteilen, hervorgerufen durch die biogene Freisetzung anorganischer bzw. organischer Säuren (Biokorrosion) sowie der biogenen Oxidation mineralbildender Kationen (Biooxidation), kommt es zur Schwächung, des Gefüges im jeweiligen Werkstoff. Durch den Aufwuchs von Biofilmen auf den Oberflächen anorganischer Materialien kommt es neben ästhetischen Beeinträchtigungen auch zu Veränderungen im Feuchte- und Temperaturverhalten des Werkstoffes sowie aufgrund von Schrumpfungs- und Quellungsprozessen von Biofilmen zu mechanischer Druckbelastung auf den Mineralverband (Bioerosion, Bioabrasion). Standort- und Umweltfaktoren, die zu entsprechend biogenen Verwitterungsphänomenen an anorganischen Werkstoffen führen, werden vorgestellt und erläutert. für die Bekämpfung der Biodeteriorationsprozesse werden die Entwicklung und Auswahl umweltgerechter, aber dennoch wirksamer anorganischer bzw. organischer biozider Zuschlagstoffe für Gesteinsschutzstoffe sowie Begasungen (z. B. Ethylenoxid) in ihrer weitreichenden Bedeutung für die zukünftige Materialforschung vorgestellt.
    Type of Medium: Electronic Resource
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