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  • Chemistry  (35)
  • Atomic, Molecular and Optical Physics
  • Magnetism
  • 1965-1969  (35)
  • 1968  (35)
Collection
Keywords
Publisher
Years
  • 1965-1969  (35)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Thermogravimetrische Methode zur Untersuchung der Gleichgewichte Festkörper/Gas und Schmelze/Gas in korrosionschemisch wichtigen Sulfatsystemen (1968)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 19 (1968), S. 837-844 
    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: Thermogravimetric method for investigating the solid/gas and melt/gas equilibria in sulphate systems of corrosion-chemical importanceThe authors describe a micro-thermogravimetric method which permits the determination of the phase zones of sulphate systems as a function of temperature and of the SO3-partial pressure. At the Me2SO4—SO3 (Me = Na, K) system, the existence limits of the bi-variant melt and the mono-variant equilibria Me2SO4(solid)-melt and Me2SO4(solid)-Me2S2O7(solid) are determined. Water vapour is dissolved in the melt phases investigated because the existence limits of the latter are modified by the vapour.
    Notes: Es wird eine mikro-thermogravimetrische Methode beschrieben, welche gestattet, die Phasenfelder von Sulfatsystemen als Funktion der Temperatur und des SO3-Partialdrucks zu ermitteln. Am System Me2SO4—SO3 (Me = Na, K) werden die Existenzgrenzen der bivarianten Schmelze und die monovarianten Gleichgewichte Me 2SO4 (fest)-Schmelze und Me2SO4 (fest)-Me2S2O7 (fest) bestimmt. Wasserdampf löst sich in den untersuchten Schmelzphasen, denn ihre Existenzgrenzen werden durch ihn verändert.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19680191002
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  • 2
    Electronic Resource
    Electronic Resource
    Extraktion von Salzen aus Kieselsäure-GelHerrn Prof. Dr. A. Steinhofer zum 60. Geburtstag (1968)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 40 (1968), S. 456-461 
    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 Extraktion von Salzen aus Kieselsäure-Gel wird im wesentlichen zurückgeführt auf eine Diffusion im Gel. Für die Fälle des Rohrreaktors und einer Kaskadenanordnung wird damit die mathematische Behandlung durch die Fickschen Diffusionsgleichungen möglich. Zur numerischen Auswertung wird ein Analogrechner benutzt. Die ermittelten Zusammenhänge zwischen Extraktionszeit und Extraktionsbedingungen sind allgemein gültig und erlauben die Optimierung einer Extraktionsanlage hinsichtlich Stufenzahl und -größe sowie spezifischem Waschwasser-Verbrauch.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330400908
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  • 3
    Electronic Resource
    Electronic Resource
    Zum dynamischen Verhalten von FüllkörperkolonnenHerrn Professor Dr. Dr. h. c. E. Bartholomé zum 60. Geburtstag (1968)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 40 (1968), S. 1153-1158 
    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: Für eine halbtechnische Füllkörper-Absorptionskolonne wurde das dynamische Verhalten durch Aufnahme von Übergangsfunktionen für Änderungen in der Gas-Eintrittskonzentration, im Flüssigkeits- und im Gasdurchsatz experimentell bestimmt und mit den Rechenergebnissen eines allgemeinen mathematischen Modells verglichen. Die Messungen wurden mit dem System Kohlendioxid/wäßrige Triäthanolamin-Lösung ausgeführt. Der Vergleich zwischen Rechnung und Experiment ergab eine befriedigende Übereinstimmung. Auf Grund der experimentellen Ergebnisse konnten einige qualitative Aussagen über das dynamische Verhalten und die Gesamteinstellzeit der Kolonne gemacht werden, die allgemein auf Füllkörpersäulen anwendbar sind.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330402305
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  • 4
    Electronic Resource
    Electronic Resource
    Neue Gele aus Cellulose und ihre Verwendung zur Chromatographie (1968)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 80 (1968), S. 414-414 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19680801045
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  • 5
    Electronic Resource
    Electronic Resource
    Kooperative Konformationsumwandlungen der Helix-Strukturen von Biopolymeren und analogen Modellsubstanzen in Lösung (1968)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 80 (1968), S. 450-450 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19680801118
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  • 6
    Electronic Resource
    Electronic Resource
    Chinodimethane aus 1,2-Diaryl-3-äthoxy-cyclopropenylium-Ionen (1968)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 80 (1968), S. 798-799 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19680801911
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  • 7
    Electronic Resource
    Electronic Resource
    Amino-acid sequence study in peptides by mass spectometry-IIFor Part I see Ref. 3.. Investigation of pentadeuterobenzoyl-peptide methyl esters (1968)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 1 (1968), S. 345-350 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The utility of benzoyl and pentadeuterobenzoyl derivatives of peptide methyl esters for mass spectrometric analysis was investigated. The mass spectra of the glu-his and the val-tyr-pro derivatives are discussed. Treatment of the peptide methyl esters with the mixed benzoic-ethyl-carbonic anhydride did in some cases lead to benzoyl derivatives as well as to ethoxycarbonyl derivatives.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210010304
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  • 8
    Electronic Resource
    Electronic Resource
    Mass spectometry of aralkyl compounds with a functional group - VI1: Mass spectra of 1-phenylethyanol-1, 2-phenylethanol-1 and 1-phenylpropanol-2Part of the forthcoming thesis of N. M. M. Nibbering. (1968)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 1 (1968), S. 365-390 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Mass spectra of 1-phenylethanol-1 and its analogues, specifically deuterated in the aliphatic chain, suggest that the [M—CH3]+ ion is represented partly by an α-hydroxybenzyl fragment. Moreover, the molecular ion loses successively - after scrambling of all hydrogen atoms, except those of CH3—a hydrogen atom and C6H6, generation the CH3CO+ ion.Diffuse peaks, found in the spectra of of 2-phenylethanol-1 and its analogues, specifically deuterated in the aliphatic chain and in the phenyl ring, show that the molecular ion loses C2H4O, possibly via a four-center mechanism, after an exchange of aromatic and hydroxylic hydrogens.Mass spectra of 1-phenylpropanol-2 and its analogues, specifically, deuterated in the aliphatic chain, demonstrate that in the molecular ion exclusively the hydroxyl hydrogen atom is transferred to one of the ortho-positions of the phenyl ring via a McLafferty rearrangement, generating the [M — C2H4O]+ ion. Furtherore, an eight-membered ring structure is proposed for the [M — CH3]+ ion to explain the loss of H2O and C2H2O from this ion after an extensive scrambling of hydrogen atoms.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210010306
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  • 9
    Electronic Resource
    Electronic Resource
    The mass spectra of some cyclic ethers (1968)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 1 (1968), S. 403-416 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectral fragmentations of the saturated five-, six- and seven-membered ring ethers have been determined by studying their site-specifically deuterated analogues by both high and low-resolution mass spectrometry.The initial processes, governing the fragmentations of the cyclic ethers are shown to be identical with the well-known processes of linear nonbranched ethers, i.e. predominant α-fisson in the lower members and predominant carbon-oxygen fisson with charge retention on the carbon atom in the higher members.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210010309
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  • 10
    Electronic Resource
    Electronic Resource
    Kupferkomplexe von Bisamiden, IVIII = [5]. UV.-Banden binuclearer Koordinationsverbindungen ohne Cu-Cu-Bindung (1968)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 51 (1968), S. 1805-1811 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cupric copper and N,N′-Bis-(2-dimethylaminoethyl)-oxamid form in aqueous solution six complexes, three of them being binuclear. Potentiometric and spectrophotometric data were used to obtain stability constants and concentration of each complex, and to calculate their electronic absorption spectra. The binuclear compounds show strong absorption bands in the near UV., in analogy to the quite differently structured dimeric copper acetate. It is proposed that all these bands near to 370 nm are of charge transfer type.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19680510742
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