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  • 1
    Electronic Resource
    Electronic Resource
    Über die Konstitution der Styrololigomeren aus der thermischen PolymerisationAuszugsweise vorgetragen im Makromolekularen Kolloquium in Freiburg i. Br. am 27. 2. 1970.Herrn Professor Dr. H. G. TRIESCHMANN zum 60. Geburtstag gewidmet (1970)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 12 (1970), S. 25-41 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Saturated and unsaturated oligomers are formed by a side reaction during the thermal polymerization of styrene. MAYO has suggested that these oligomers are closely associated with the initiation step.Recently the structures of the dimer fraction were published by BROWN. By independent synthesis of the dimers we could confirm his results. The main components of the dimer fraction are trans- and cis-1.2-diphenylcyclobutane in a ratio of 3:1 ; also smaller amounts of 1.3-diphenylbutene-(3) and I-phenyltetralin were found.The aim of this work was to clarify the structures of the trimers. The trimer fraction contains about 30% of 1.3.5-triphenylhexene-(5), the structure of which was confirmed by independent synthesis. Furthermore we were able to show, that about 65% of the trimer fraction consists of the 4 optical inactive isomers of 1-phenyl-4-[1′-phenyläthyl-(1′)]-1.2.3.4.-tetrahydronaphthalene. Their structures were confirmed by dehydrogenation to 1-phenyl-4-[1′-phenyläthyl-(1′)]-naphthalene, which was identical to an independently synthesized sample.
    Notes: Bei der thermischen Polymerisation von Styrol entstehen in einer Nebenreaktion gesättigte und ungesättigte Oligomere, die nach MAYO in engem Zusammenhang mit der Startreaktion stehen.Durch unabhängige Synthese der Dimeren konnten wir die kürzlich von BROWN veröffentlichten Strukturen bestätigen. Hauptkomponenten der Dimerenfraktion sind trans- und cis-1.2-Diphenylcyclobutan im Verhältnis etwa 3:1; in kleineren Mengen wurden noch 1.3-Diphenylbuten-3 und 1-Phenyltetralin nachgewiesen.Hauptaufgabe dieser Arbeit war die Strukturaufklärung der trimeren Styrole. Das Auftreten von 1.3.5-Triphenylhexen-5 konnte durch Synthese gesichert werden; es ist zu etwa 30% in der Trimerenfraktion enthalten.Weiterhin konnten wir zeigen, daß etwa 65% der Trimerenfraktion aus den vier isomeren, optisch inaktiven 1-Phenyl-4-[1′-phenyläthyl-(1′)]-1.2.3.4.-tetrahydronaphthalinen bestehen. Die Struktur wurde durch Dehydrierung zum optisch inaktiven 1-Phenyl-4-[1′-phenyläthyl-(1′)]-naphthalin und dessen Vergleich mit einer unabhängig synthetisierten Probebewiesen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1970.050120103
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  • 2
    Electronic Resource
    Electronic Resource
    101. Zur Dimensionierung von Destillationskolonnen mit regellosen und strukturierten Packungen (1993)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 65 (1993), S. 1113-1114 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.3306509103
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  • 3
    Electronic Resource
    Electronic Resource
    159. Zum Scale-up von Destillationskolonnen (1994)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 66 (1994), S. 1256-1256 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.3306609160
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  • 4
    Electronic Resource
    Electronic Resource
    Optimierung des Informationsflusses aus automatischen AnalysensystemenÜberarbeitete Fassung eines Vortrages auf der Dechema-Jahrestagung, 26. und 27. Juni 1969 in Frankfurt/M. (1970)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 42 (1970), S. 872-877 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Die Erhöhung des dynamischen Meßbereiches, der Auflösung oder der Meßgeschwindigkeit moderner physikalisch-chemischer Analysensysteme hat in ständig zunehmendem Maße auch zu einer Vermehrung des anfallenden Datenmaterials geführt, welches der Mensch als Informationsempfänger schon heute oft nicht mehr bewältigen kann. Dieser Beitrag untersucht die verschiedenen Möglichkeiten, diese Informationsflut nach Art und Intensität in akzeptablen Grenzen zu halten und auf den Menschen als „informationsverarbeitendes System“ abzustimmen - eine Forderung, die von den mehr auf die Lösung kommerzieller Probleme bedachten Computer-Herstellern und von den Instrumenten-Herstellern gegenwärtig noch nicht gebührend berücksichtigt wird.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330421304
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  • 5
    Electronic Resource
    Electronic Resource
    Laboratoriumsgeräte (1964)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 36 (1964), S. 1187-1207 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 25 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330361209
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  • 6
    Electronic Resource
    Electronic Resource
    Transverse NMR relaxation of water in wood (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 23 (1979), S. 3147-3154 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The transverse NMR relaxation times of hydrogen nuclei of water absorbed in white spruce sapwood [Picea glauca (Meunch) Voss] were measured for moisture contents in the range from 5 to 176%. The spin echo amplitudes resulting from the Carr-Purcell sequence decay nonexponentially suggesting the possibility of at least two different relaxation times for water in wood. A simplified structural model of the wood-water mixture is used to estimate the rates of chemical exchange at room temperature of hydrogen nuclei between various sites in the system. The high-resolution NMR line shape is discussed briefly in terms of this proposed model.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1979.070231101
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis of transparent fluorocarbon elastomers: Effect of crosslinker type and electron beam irradiation level on physical and mechanical behavior (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 27 (1982), S. 957-968 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Saturated fluorocarbon elastomers are very resistant to chemical reactions, including those of a crosslinking nature. In order to study proper methods of preparing these materials, Viton GLT was mixed with various levels of trimethylol propane trimethacrylate, TMPTM, and triallyl isocyanurate, Diak #7. After molding, the materials were subjected to electron beam irradiation. The glass transition, rubbery modulus, viscoelastic behavior, and equilibrium swelling were used to characterize the materials as a function of crosslinker and irradiation level. In general, the modulus and gel fraction increased with both crosslinker content and irradiation level. Mixtures of both crosslinking monomers produced an unexpected synergism, yielding higher tensile strength, and earlier onset of gelation.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1982.070270315
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  • 8
    Electronic Resource
    Electronic Resource
    Change of polarity by temperature variation of series-coupled micropacked GC columns, measured in retention index data (1978)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 1 (1978), S. 201-202 
    Details
    ISSN: 0935-6304
    Keywords: Gas Chromatography ; Micropacked columns ; Series-coupled ; Polarity change by temperature variation ; Temperatures independently varied in each column ; Retention index data for study of microprocessor-controlled resolution optimization ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240010406
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  • 9
    Electronic Resource
    Electronic Resource
    Polarity change in capillary GC by serial-column temperature optimization (SECAT mode in capillary GC) (1979)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 2 (1979), S. 416-422 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; SECAT-technique=stepless fine tuning of capillary selectivity by serial column temperature optimization ; Exponential influence of temperature on selectivity over a wide range found ; SECAT-technique ready for automation of column adjustment on sample composition polarity ; Instrumental and methodological details for primitive self made solution given ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: GC, including capillary GC, is rather inflexible, if a certain column length and stationary phase has been fixed for a given analytical problem. If the sample composition changes, one often has to change the column length and/or stationary phase, at least when something like optimum analytical conditions are needed. Temperature changes (or heating rates) can change the selectivity of a given column only within very limited ranges, due to the exponential effect of temperature on retention time. By serial coupling two chemically different capillaries, each run at another temperature, even the slightest changes of these two temperature values have a dramatic effect on the selectivity of the system for polar substances. We call this technique the SECAT mode of GC. Results are reported as retention index shifts, dependent on SECAT temperature data. This technique can in future easily be automated, thus enabling the analyst, for polar sample analysis, to adjust a given chroma-tographic system to his specific sample composition without touching the instrument.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240020709
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  • 10
    Electronic Resource
    Electronic Resource
    ABT Concept. Measuring, checking, and optimizing separation capability and column utilization in GC and HPLC (1979)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 2 (1979), S. 679-686 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240021111
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