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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 16 (1978), S. 239-246 
    ISSN: 1432-0630
    Keywords: 72.40 ; 73
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Indium oxide films doped with tin (ITO-films) have been hf-sputtered from an 80 at-%In2O3/20 at-%SnO2 target onto glass substrates. The sputter atmosphere contained mainly argon (10−2Torr) with addition of oxygen (0≦p O 2≦2·10−2Torr). The sputtered films aren-conductors. The conductivity and density of charge carriers depend on the oxygen content of the sputter gas. They could be varied by two orders of magnitude. In air or in oxygen atmosphere the films oxidize at the surface and for a certain depth beneath the surface, thus decreasing the conductivity. The Hall mobility of the sputtered films is smaller (≈10 cm2V−1 s−1) than one observes at ITO films produced by CVD sparaying or other methods. The conductivity of as sputtered films approached maximum values of about 1000Ώ−1cm−1.
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  • 2
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Macromolecules 11 (1978), S. 452-454 
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 1 (1979), S. 1443-1450 
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Für die Kompressionsgleichung (s − a) (p + b) = C wurden die drei Hyperbelkonstanten a, b, und C interpretiert und ihre Abhängigkeit vom Mischungsverhältnis zweier Substanzen untersucht. Die Grö\e b wurde als Verformungsspannung bezeichnet, sie kann mit der Flie\grenze eines Materials in Beziehung gesetzt werden. In einer Tablettenrezeptur kann der Anteil an verformtem Arzneistoff mit Hilfe der Konstanten b abgeschätzt werden.
    Notes: Abstract The three hyperbolic constants a, b and C were interpreted for the compression equation (s − a) (p + b) = C. Their dependence upon the mixture ratio of two substances was investigated. The quantity b was designated as deformation strain, it can be related to the yield point of a material. The proportion of deformed drug in a tablet formulation can be estimated by means of the constant b.
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  • 5
    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: Interactions between creep deformation and hot gas corrosionThe paper starts with a short explanation of the basic processes during the high temperature corrosion and of deformation under creep stress.Corrosion may give rise to an increase or a decrease of creep resistance, or it may result in an increase of the stress applied. The individual mechanisms are explained and, as far as possible, illustrated by examples. As a rule, however, several factors act simultaneously. The concerted actions is further complicated by back effects of a creep deformation on the corrosion processes. In the case of iron and nickel base alloys there exist obviously critical strain rates beyond which corrosion is enhanced and then proceeds more pronouncedly at the grain boundaries. It is also possible that then internal corrosion processes are triggered, in particular, in the grain boundary regions.While a qualitative assessment of the relationships between corrosion and creep deformation is possible, the feasibility of a quantitative description is still far away. As a rule, however, the aspect of a strength decrease will prevail although, in principle, corrosion may give rise to a strengthening, too.
    Notes: Einleitend werden kurz die Grundvorgänge der Heißgaskorrosion und der Verformung unter Zeitstandbeanspruchung erläutert.Die Korrosion kann den Kriechwiderstand erhöhen oder erniedrigen oder aber auch die anliegende Spannung vergrößern. Die einzelnen Mechanismen werden erläutert und - soweit möglich - durch Beispiele belegt. In der Regel wirken jedoch gleichzeitig mehrere Faktoren ein. Das Zusammenspiel wird durch Rückwirkungen der Kriechverformung auf die Korrosionsvorgänge weiter kompliziert. Für Eisen- und Nickelbasislegierungen gibt es offenbar kritische Dehngeschwindigkeiten, bei deren Überschreiten die Korrosion verstärkt und stärker korngrenzenorientiert abläuft. Auch innere Korrosionsvorgänge können dadurch besonders im Korngrenzenbereich ausgelöst werden.Während die Zusammenhänge zwischen Korrosion und Kriechverformung qualitativ überschaubar sind, liegt die Möglichkeit einer quantitativen Beschreibung noch in weiter Ferne. In der Regel werden die „Negativ-Punkte“ überwiegen, obgleich im Prinzip die Korrosion auch eine Verfestigung bewirken kann.
    Additional Material: 13 Ill.
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  • 6
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Some Substitution Reactions of Trimeric ThioformaldehydeTreatment of s-trithiane with n-butyllithium results in the formation of lithium salts of carbenium ions. Their reactions with the halo-functional compounds lead to mono- or multi-substituted trithianes besides lithium chloride.
    Notes: Die Behandlung von s-Trithian mit n-Butyllithium führt zu Lithiumsalzen von Carbanionen. Bei der Umsetzung mit den halogenfunktionellen Verbindungen CH3J. (CH3)3SiCl, (CH3)3GeCl, (CH3)3SnCl und (CH3)2SiCl2 reagieren diese unter Abspaltung von LiCl zu ein- oder mehrfach substituierten s-Trithianen.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 437 (1977), S. 146-148 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Rapid Synthesis of Very Pure Bis-Bromo-Methylsulfide without SolventBis-bromo-methyl sulfide is produced by the direct reaction of thioformaldehyde with elemental bromium. High quantities of the pure compound are obtained, when it is purified by distillation.
    Notes: Bis-brommethylsulfid entsteht bei der direkten Reaktion von Thioformaldehyd mit elementarem Brom. Bei der anschließenden Destillation erhält man die Verbindung in hohen Ausbeuten und in reiner Form.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 437 (1977), S. 159-161 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Isomerizations of Triple Substituted s-TrithianeTreatment of triple silyl-substituted s-trithiane with n-butyllithium results in the formation of lithium salts of carbenium ions. Their reactions with water or heavy water lead to isomers of 2,4,6-tris-(trimethylsilyl)-s-trithianes.
    Notes: Dreifach silyliertes s-Trithian wird mit überschüssigem n-Butyllithium umgesetzt. Die entstehenden Lithiumsalze von Carbanionen ergeben bei Zusatz von Wasser bzw. Deuteriumoxid Isomere des 2,4,6-Tris-(trimethylsilyl)-s-trithians.
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  • 9
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Carbonyl Metal Compounds with Polydentate Cyclic Ligands. I. Pentacarbonyl Complexes of s-Trithiane and Related CompoundsThe complexes (RCHS)nM(CO)5 (R = H, CH3, n = 3; R = H, n = 4; M = Cr, Mo, W) were prepared from the tetrahydrofuran pentacarbonyl metal compounds and the respective ligands. The Cotton-Kraihanzel force constants of these complexes indicate the sulfur ligands to be slightly more basic than triphenylphosphine. The trimethyltrithiane complexes (R = CH3, n = 3) exhibit rapid intramolecular exchange of the M(CO)5-group along the three coordination centers of the ligand.
    Notes: Die Komplexe (RCHS)nM(CO)5 (R = H, CH3, n = 3; R = H, n = 4; M = Cr, Mo, W) wurden aus den Tetrahydrofuran-pentacarbonylmetallverbindungen und dem jeweiligen Liganden dargestellt. Die Cotton-Kraihanzel-Kraftkonstanten dieser Komplexe weisen die Schwefelliganden als geringfügig schwächere Akzeptoren, verglichen mit Triphenyl-phosphin, aus. Die Komplexe des Trimethyltrithians (R = CH3, n = 3) zeigen einen raschen intramolekularen Austausch der M(CO)5-Gruppe über die drei Koordinationsstellen des Liganden.
    Additional Material: 4 Tab.
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  • 10
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Properties of Some Polymeric Compounds, Formed from Sixmembered or Eightmembered C—S Ringss-Trithiane, substituted s-trithianes and s-tetrathiocanes, cyclooctasulfur and to some extent selenium can be polymerized together with s-tetrathiocane, if the molten mixtures are treated with a trace of borontrifluoride etharate. This leads to polymethylene sulfides, substituted polymethylene sulfides, polymethylene polysulfides and polymethylene sulfide selenides which melt mostly without decomposition.
    Notes: s-Trithian, monosubstituierte s-Trithiane und s-Tetrathiocane, Cyclooctaschwefel und in begrenztem Maße auch Selen können zusammen mit Tetrathiocan polymerisiert werden, wenn die geschmolzenen Gemische mit einer Spur Bortrifluoridetherat behandelt werden. Es entstehen dabei meist unzersetzt schmelzende Polymethylensulfide, substituierte Polymethylensulfide, Polymethylenpolysulfide und Polymethylensulfidselenide.
    Additional Material: 6 Ill.
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