ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Wiley-Blackwell  (278)
  • American Physical Society  (109)
  • 1985-1989  (387)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Untersuchungen zur radikalischen Copolymerisation von Acrylnitril mit α-Olefinen. 8. Mitt.: Bestimmung der r-Werte nach dem Modell der am Reaktionsort reduzierten Olefinkonzentration7. Mitt.: siehe [1] (1985)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 36 (1985), S. 671-675 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: In the binary copolymerization systems of allylbenzene, 2-methylpentene-1 and isobutene with acrylonitrile rOlefin = 0 can be postulated. By linear correlation of the rAN-values with the molar fraction of the olefin the ordinate intersection provides constant values of rAN depending only on the kind of olefin and the solvent. Constant values of rAN are also obtained by supposing the olefin concentration to be reduced at the reaction site. The concentration of reactive olefins is related to their initial amount by an exponential expression.
    Notes: Für die binären Copolymerisationssysteme von Allylbenzen, 2-Methylpenten-1 und Isobuten mit Acrylnitril läßt sich rOlefin = 0 postulieren. Durch lineare Korrelation der rAN-Werte und dem Molenbruch des Olefins werden aus dem Ordinatenabschnitt konstante rAN-Werte erhalten, die nur von der Art des Olefins und dem Lösungsmittel abhängig sind. Die konstanten rAN-Werte lassen sich auch auf Basis der Modellvorstellung, daß die Olefinkonzentration am Reaktionsort reduziert ist, ableiten. Die reaktive Olefinkonzentration ist durch eine Exponentialbeziehung mit der eingesetzten verknüpft.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1985.010361208
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Untersuchungen zur radikalischen Copolymerisation von Acrylnitril mit α-Olefinen. 7. Mitt.: Bestimmung der r-Werte bei niedrigem und höherem Umsatz - Versuch einer Modellselektion für das System α-Methylstyren/Acrylnitril6. Mitt.: Acta Polymerica 30 (1979) 409-411 (1985)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 36 (1985), S. 536-540 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The quantitative determination of the r-values has been performed by non-linear optimum adaption of various selected copolymerization equations to the experimental values referring to low and high conversion with the aim of model selection. The two-parameter models discussed provide r-values being independent of comonomer composition and conversion. The three-parameter models, as the penultimate model, suggesting particularly reduced olefine concentration at the reaction site, can account for model deficiencies in the medium composition range of the monomer mixture.
    Notes: Die Quantifizierung der r-Werte erfolgt durch nichtlineare optimale Anpassung verschidenster ausgewählter Copolymerisationsgleichungen an die experimentellen Daten bei niedrigem und höherem Umsatz mit der Zielstellung einer Modellselektion. Alle diskutierten Zweiparametermodelle liefern r-Werte, die von der Comonomerzusammensetzung und vom Umsatz abhängig sind. Dreiparametermodelle, wie das „Penultimate Modell“, und besonders die Annahme der am Reaktionsort reduzierten Olefinkonzentration können den Modelldefekt in mittleren Zusammensetzungsbereichen der Monomermischung beheben.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1985.010361004
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Untersuchungen zur radikalischen Copolymerisation von Acrylnitril mit α-Olefinen in polaren Lösungsmitteln 10. Mitt.: Abhängigkeit der Bruttogeschwindigkeit von den Reaktionsbedingungen9. Mitt.: siehe [4] (1986)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 37 (1986), S. 172-174 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The overall rate of copolymerization of the systems acrylonitrile/allylbenzene, acrylonitrile/α-methylstyrene, acrylonitrile/2-methylpentene-1 and, for comparison, acrylonitrile/styrene was determined in dependence on the solvent of the monomer mixture, the overall monomer concentration and the temperature. The results are discussed by means of an empirical overall rate equation.
    Notes: Die Bruttogeschwindigkeit der Copolymerisation der Systeme Acrylnitril/Allylbenzen, Acrylnitril/α-Methylstyren, Acrylnitril/2-Methylpenten-1 und im Vergleich dazu von Acrylnitril/Styren werden in Abhängigkeit vom Lösungsmittel der Monomermischung, der Gesamtmonomerkonzentration und der Temperatur bestimmt. Die Ergebnisse werden mit einer empirischen Bruttogeschwindigkeitsgleichung diskutiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1986.010370311
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Untersuchungen zur radikalischen Copolymerisation von Acrylnitril mit α-Olefinen. 9. Mitt.: Lösungsmittelabhängigkeit der Copolymerisationsparameter8. Mitt.: siehe [2] (1986)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 37 (1986), S. 16-18 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The constants derived for the copolymerization systems of allylbenzene, 2-methylpentene-1 and isobutene with acryloninitrile, the rAN values being independent of the comonomer mixture and the yield, as well as the parameters rANL required for estimating the effect of the solvent by combining the overall rate and copolymerization equations were found to correlate linearly with the donor value of the solvent. The effect of the solvent is explained predominantly by the interaction of electrophilic macroradicals being solvated to different degree with acrylonitrile at the chain end.
    Notes: Die für die Copolymerisationssysteme von Allylbenzen, 2-Methylpenten-1 und Isobuten mit Acrylnitril abgeleiteten Konstanten, die von der Comonomermischung und dem Umsatz unabhängigen rAN-Werte sowie die zur Quantifizierung des Lösungsmitteleinflusses aus der Kombination von Bruttogeschwindigeits- und Copolymerisationsgleichung erhaltenen Parameter rANL korrelieren linear mit der Donorzahl der Lösungsmittel. Der Lösungsmitteleinfluß wird vor allem durch die Wechselwirkung des unterschiedlich solvatisierten elektrophilen Makroradikals mit Acrylnitril am Kettenende erklärt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1986.010370104
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Mass spectral studies of the carboxylic acid ionophore antibiotic griseochelin and its derivatives (1988)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 15 (1988), S. 359-363 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The electron impact (EI) mass spectra (75 eV) of the new carboxylic acid ionophore griseochelin and some of its derivatives are discussed. The mass spectral fragmentation was studied using exact mass measurements and deuterium labelling. Furthermore, the negative ion mass spectra (2-4 eV) of these compounds are compared with their EI mass spectra.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200150702
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Liquid butane as a solvent for static coating of capillary columns (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 32-33 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Glass and fused silica capillary columns ; Coating time and efficiency ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240080109
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Gas chromatographic - mass spectrometric analysis of compounds generated upon thermal degradation of some stationary phases in gas chromatography - Part IIPart I: see [14]. (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 734-740 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography-mass spectrometry ; Capillary columns ; Stationary phases ; Silicones ; Thermal degradation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The applicability of capillary columns for gas chromatography is often limited by stationary phase degradation at elevated temperatures. In order to achieve a better understanding of column thermostability, column bleed products have been analyzed qualitatively by gas chromatography-mass spectrometry (GC-MS). Three silicone stationary phases were studied: SE-52, SE-54, and OV-1701. Each of these was immobilized in the columns. The proportion of cyclics containing diphenyl in column bleed from SE-52 reflected to a large extent the composition of the polymer, while for SE-54 the proportion of such cyclics was unexpectedly high. The polar moiety of OV-1701, the cyanopropyl(phenyl)siloxy unit, was found to exert a highly destabilizing effect on the polymer, and the thermal degradation products consisted mainly of cyclosiloxanes containing this unit.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240081108
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Herstellung von Metall-Matrix-Verbundwerkstoffen mit metallischen Gläsern (1988)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 19 (1988), S. 36-40 
    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: Metal-matrix Composites with Metallic GlassesMetallic glass ribbons are well known for their very high tensile strengths. Since they offer an attractive potential of low-cost volume production, the development of a metallic glass-metal matrix composite should be very attractive. This paper reports first results on the feasibility of fabricating such composites by surface plating or incorporation by various techniques.The influence of fabrication methods on the interfacial bonding was investigated by means of cross-sectional light and electron microscopy.
    Notes: Metallglas-Bänder zeichnen sich durch sehr hohe Zugfestigkeit und kostengünstige Herstellung aus, so daß die Entwicklung eines Metallglas-Metallmatrix-Verbundwerkstoffes ausgesprochen interessant erscheint.Die vorliegende Arbeit berichtet über erste Ergebnisse, solche Verbundwerkstoffe durch Oberflächenbeschichten, verschiedene Einbettmethoden bzw. ein Festkörperreaktionsverfahren herzustellen.Dabei wird vorallem der Einfluß der Herstellungsmethoden auf die Grenzflächenhaftung licht- und elektronenmikroskopisch untersucht.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19880190107
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Quantitative analysis of ethylenediamine in plasma by capillary column gas chromatography (1986)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 9 (1986), S. 548-554 
    Details
    ISSN: 0935-6304
    Keywords: Gas liquid chromatography (GLC) ; Fused silica capillary columns ; Alkali flame ionization detection (AFID) ; Mass spectrometry (MS) ; Quantitation in human serum ; Ethylenediamine ; Aminophylline ; Small molecular weight amines and diamines ; m-Toluoyl derivatives ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A specific and sensitive method for the determination of ethylenediamine in human plasma is described. The aqueous sample is treated with m-toluoyl chloride, yielding the N,N′-bis(m-toluoyl) derivative of the diamine, which is extracted into dichloromethane and quantitated after “on column” methylation by capillary gas liquid chromatography with alkali flame ionization detection. The corresponding derivative of putrescine serves as internal standard. The assay is reproducible and calibration curves are linear over the concentration range 0.05 to 10 μg · ml-1. The lower detection limit is about 10 ng · ml-1. The structures of the compounds of interest eluting from the capillary column are examined by gas liquid chromatography/mass spectrometry. The assay has been applied to the analysis of ethylenediamine in plasma following the administration of aminophylline and ethylenediamine in a cross-over study to patients with bronchopulmonary diseases. The method also proves suitable for measuring other primary and secondary amines and diamines in aqueous solutions by gas liquid chromatography.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240091002
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Cyclodextrins as chiral stationary phases in capillary gas chromatography. Part III: Hexakis(3-O-acetyl-2,6-di-O-pentyl)-α-cyclodextrinPart II: see ref. [4]. (1988)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 11 (1988), S. 621-625 
    Details
    ISSN: 0935-6304
    Keywords: Enantioselective gas chromatography ; α-Cyclodextrin ; Lactones ; O-Alkylglycerols ; Chiral pharmaceuticals ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The properties of hexakis(3-O-acetyl-2,6-di-O-pentyl)-α-cyclodextrin as a chiral stationary phase for capillary gas chromatography are described. For the first time the enantiomers of a series of different lactones are separated and their order of elution is assigned. Moreover, the enantiomers of trifluoroacetylated aldols and amino alcohols, the cyclic carbonates of 1,2-diols, 1,3-diols, O-alkylated glycerols, and some chiral pharmaceuticals are also separated on the new chiral phase. The modified α-cyclodextrin is stable above 200°C.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240110903
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...