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  • Chemistry  (43)
  • Atomic and molecular collisions and interactions
  • Atomic and molecular processes in external fields, including interactions with strong fields and short pulses
  • 1980-1984  (43)
Collection
Keywords
Publisher
Years
Year
  • 11
    Electronic Resource
    Electronic Resource
    Möglichkeiten zur Lebensdauervorhersage durch Eigenspannungsmessungen an einem wechselbeanspruchten austenitischen Stahl (1980)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 11 (1980), S. 209-212 
    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: X-Ray Stress Measurement on Austenitic Steels - A Possibility of Predicting Fatigue DamageBased on the results found for fatigue tests on a ferritic steel combined with x-ray stress analysis similar investigations were carried out for an austenitic stainless steel. For that reason the Wöhler tests were interrupted after defined load cycle numbers and the residual stress and the half value breadth of the x-ray peaks were determined in the groove of the samples. The investigation has shown correlations between residual stress, load amplitudes and load cycle numbers. These relations in connection with a dependence of the breadth of the x-ray peaks from the load cycle number have been used for a non-destructive testing model of predicting the life of samples under alternating load.
    Notes: Aufbauend auf Untersuchungen an einem ferritischen Stahl wurden an Proben aus einem austenitischen Stahl Ermüdungsversuche kombiniert mit Eigenspannungsmessungen durchgeführt. Dazu wurden die Wöhlerversuche definiert nach vorgegebenen Lastwechselzahlen unterbrochen und röntgenografisch die Eigenspannungen und Interferenzbreiten im Kerb der Proben bestimmt. Es zeigten sich Abhängigkeiten der Oberflächeneigenspannungen von Lastamplituden und Lastwechselzahlen, die unter Zuhilfenahme der ebenfalls gefundenen Zusammenhänge zwischen Halbwertbreiten und Lastwechselzahlen dazu herangezogen werden, um auf zerstörungsfreiem Wege auf die Lebensdauer wechselbeanspruchter Proben zu schließen.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19800110606
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  • 12
    Electronic Resource
    Electronic Resource
    Der Einfluß der Feuchteaufnahme auf die mechanischen Eigenschaften von PhenoplastenMitteilung aus dem Institut für Werkstoffkunde der TH Darmstadt. (1984)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 15 (1984), S. 299-308 
    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: The Effect of Moisture on the Mechanical Properties of Phenolic Moulded MaterialsIn order to use thermosetting moulding material it is necessary to know how the mechanical properties are changed by absorption of water. Therefore, multiphase systems based on phenolic resin, with varying quantities of wood flour and/or powdered minerals as fillers, were examined. The relationship between moisture absorption and the change in Young's modulus, flexural strength and the strain of the outer fibre at fracture was determined. It could be shown that the increase in flexural strength as water absorption began is a result only of the swelling stress.
    Notes: Voraussetzung für den Einsatz duroplastischer Formstoffe in erhöhter Umgebungsfeuchte ist die Kenntnis der durch die Feuchteaufnahme bewirkten Änderung der mechanischen Werkstoffeigenschaften. Ausgehend von in ihrer Zusammensetzung variierten Mehrstoffsystemen auf der Basis Phenolharz/Holzmehl/Gesteinsmehl wird die formstoff- und feuchtespezifische Wechselwirkung zwischen Feuchteaufnahme, Biege-E-Modul, Biegefestigkeit und Randfaserdehnung beim Bruch aufgezeigt, und nachgewiesen, daß der zu Lagerungsbeginn zu beobachtende Anstieg der Biegefestigkeit ausschließlich auf durch Sorption hervorgerufene Druck-Eigenspannungen zurückzuführen ist.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19840150902
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  • 13
    Electronic Resource
    Electronic Resource
    A simple closing technique for capillary column making (1980)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 3 (1980), S. 298-298 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Closing technique for static coating ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240030607
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  • 14
    Electronic Resource
    Electronic Resource
    The use of chemically bonded stationary phases in thin-layer chromatography-a surveyBased on a paper presented at the Second Intemational Symposium on Instrumental High Performance Thin Layer Chromatography, Interlaken, May 1982. (1982)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 5 (1982), S. 476-482 
    Details
    ISSN: 0935-6304
    Keywords: Thin-layer chromatography, TLC ; Reversed phase TLC ; Chemically bonded stationary phases ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An overview is given of the literature publisned in the field of thin-layer chromatography on chemically bonded phases. Aspects which merit further attention are: quantitative analysis, organic solvent selection, stationary phase characteristics, surface modification of precoated silica plates, ion-pair chromatography and correlation of thin-layer and column chromatographic data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240050905
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  • 15
    Electronic Resource
    Electronic Resource
    Pre-chromatographic derivatization of samples for (HP)TLCBased on a paper read at the second international Symposium of Instrumental Thin-layer Chromatography, May 1982, Interlaken. Switzerland. (1982)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 5 (1982), S. 534-538 
    Details
    ISSN: 0935-6304
    Keywords: Thin-layer chromatography, (HP)TLC ; Pre-chromatographic derivatization ; Quantitation of estriol, cortisol, selenium ; Biological matrix ; Water analysis ; Ready-for-use column extraction ; Fluorescence enhancement ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240051004
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  • 16
    Electronic Resource
    Electronic Resource
    Schwingungsrißkorrosion an plasmanitriertem stahlAuszugsweise vorgestellt auf der Hauptversammlung der Deutschen Gesellschaft für Metallkunde 1982 in Villach (1982)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 33 (1982), S. 647-653 
    Details
    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: Corrosion fatigue of plasmanitrided steelThe effect of plasma-nitriding of steel 34 CrAlMo 5 on corrosion fatigue has been investigated in cyclic torsion. The tests were conducted in air, tap water and artifical sea water. Crack initiation and propagation have been studied by means of metallographic and fractographic methods to identify the fatigue mechanisms.Main results may be summarized as follows: The fatigue strength increases by about 40% due to plasma-nitriding over that of nonnitrided steel when tested in air. Even in corrosion environment plasma-nitriding improves remarkably the fatigue strength. The torsional fatigue strength of plasmanitrided specimen is not affected by the presence of tap water. In artifical sea water the distinct fatigue limit disappears. However, the fatigue life of the plasmanitrided specimen increases by factor of 10 compared with that of non-nitrided specimen. The reasons for this improvement were discussed by considering the mechanical and metallurgical aspects of the problems.
    Notes: Das Schwingungsrißkorrosionsverhalten von plasmanitriertem Stahl 34 CrAlMo 5 wurde in Torsionswechselversuchen an Luft, in Leitungswasser und in künstlichem Meerwasser untersucht. Rißbildung und Rißausbreitung wurden mittels metallographischer und fraktographischer Untersuchungsmethoden analysiert. Die Ergebnisse lassen sich folgendermaßen zusammenfassen: Durch das Plasmanitrieren wird an Luft eine Steigerung der Dauerfestigkeit um 40% gegenüber dem unbehandelten Zustand erreicht. Auch bei Einwirkung eines korrosiven Mediums bewirkt die Plasmanitrierschicht eine wesentliche Verbesserung des Dauerschwingverhaltens. Die Torsionswechselfestigkeit des plasmanitrierten Werkstoffes wird von einer Leitungswasserumgebung nicht beeinträchtigt. Im künstlichen Meerwasser existiert sowohl im unbehandelten als auch im plasmanitrierten Werkstoffzustand keine Dauerfestigkeit. Die Lebensdauer des plasmanitrierten Werkstoffes ist jedoch um eine Zehnerpotenz größer als die des unbehandelten Werkstoffes. Für die dargestellten Versuchsergebnisse werden verschiedene Deutungsmöglichkeiten diskutiert.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19820331202
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  • 17
    Electronic Resource
    Electronic Resource
    Untersuchungen zur lokalen Zusammensetzung von Glasfasern mit Hilfe der Röntgenmikroanalyse (1984)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 15 (1984), S. 132-140 
    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: Investigations of the Local Composition of Glass Fibers with the Help of the Scanning Electron MicroanalysisVarious glass-fiber types show different chemical resistance in the surrounding of aggressive media. Through the influence of inorganic acid or alkali media certain elementary glass fibres can be leached. This effect can be seen optically in some kinds of glass-fibers. Other glass-fiber types show no optical change in the surface, although there is an aggressive attack Now it is possible to understand the leaching process in glass-fibers with the help of the scanning electron microanalysis. In that way corrosion procedures of various glass-fiber types can be better described.
    Notes: Verschiedene Glasfasertypen weisen gegenüber aggressiven Umgebungsmedien eine unterschiedliche Chemikalienresistenz auf. Durch die Einwirkung saurer oder alkalischer Medien können einige Elementarglasfasern ausgelaugt werden, was sich optisch verfolgen lassen kann, andere Glasfasern wiederum zeigen kaum optische Veränderungen. Mit Hilfe der Röntgenmikroanalyse besteht nun die Möglichkeit die durch den Auslaugprozeß hervorgerufene chemische Veränderung der Glasfaserzusammensetzung verschiedener Typen quantitativ bzw. semiquantitativ zu erfassen. Dadurch lassen sich Korrosionsvorgänge an einzelnen Elementarglasfasern besser beschreiben als bisher.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19840150405
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  • 18
    Electronic Resource
    Electronic Resource
    Abriebfestigkeiten der Korrosionsschutzbeschichtungen im Stahlwasserbau (1980)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 31 (1980), S. 866-869 
    Details
    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: Wear-resistance of anti-corrosion coatings in hydraulic steel constructionsDIN 55 928 gives rules for the protection of steel structures from corrosion by organic and metallic coatings. The durability against abrasion of such coatings is classified in part 5, table 8, columns 9-11, of this DIN. A notice to these columns gives indication of an abrasion-machine developed by the Bundesanstalt für Wasserbau in Karlsruhe.Giving the best results, this machine for testing the mechanic durability was chosen out of a number of testing systems. The result is an abrasion value (Abriebwert).This value enables us to classify the coatings in accordance with their durability.The abrasion machine, its main dimensions and its working are described.
    Notes: In der Tabelle 8 des Teils 5 der DIN 55 928 - Korrosionsschutz von Stahlbauten durch Beschichtungen und Überzüge - wird in Spalte 9-11 die mechanische Beanspruchung der Beschichtungen klassifiziert und in einer Bemerkung dazu auf ein Prüfgerät hingewiesen, das bei der Bundesanstalt für Wasserbau in Karlsruhe entwickelt wurde.Das Prüfgerät ist das Ergebnis einer längeren Entwicklung; es ermöglicht die Angabe eines „Abriebwertes“ als Abstufung der Belastbarkeit von Beschichtungssystemen.Die Entwicklung des Prüfgerätes wird dargelegt und das Prüfgerät sowie der Prüfvorgang beschrieben.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19800311105
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  • 19
    Electronic Resource
    Electronic Resource
    Photochemie von Aminoketonen. IV [1]. Synthese von 3-Aryl-pyrrolidinolen-(3) durch Photocyclisierung von β-Amino-propiophenonen (1981)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 323 (1981), S. 435-444 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Photochemistry of Aminoketones. IV. Synthesis of 3-Aryl-pyrrolidinols-(3) via Photocyclization of β-Amino-propiophenonesPhotolysis (λirr ≥ 300 nm) of N-benzyl-N-benzoyl-β-aminopropiophenones 6-9 in abs. ether affords a 47-50% yield of N-benzoyl-pyrrolidinols 12-18. The relative configurations of the diastereomeric 12-18 are determined by 1H-n.m.r. spectroscopy. The different behaviour of the N-acylated 6-9 in contrast to N,N-dialkyl-β-aminopropiophenones is explained by assumption of a dipol-dipol interaction between the keto and the amido carbonylgroups in the n,π*-excited state.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19813230310
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  • 20
    Electronic Resource
    Electronic Resource
    Flexibility of a labeled polymer chain: Time-resolved fluorescence depolarization measurements and their interpretation by a Hinged-Dumbbell model (1983)
    New York : Wiley-Blackwell
    Biopolymers 22 (1983), S. 1301-1318 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Time-resolved fluorescence depolarization was applied to investigate the dynamics of low-molecular-weight polyethylene glycols (MW 150, 400, 1000, 4000) labeled by fluorescein-isothiocyanate. The analysis of measurements revealed considerable flexibility of the polymer chain. To interpret the observed dependence of the relaxation time of polarization anisotropy on the molecular weight of the polymer, a simple freely-hinged dumbbell model was developed. The properties of the model were investigated by computer experiments. The model was found to account well for the measured data.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360220505
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