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  • SPACE SCIENCES  (183)
  • Physics  (56)
  • Analytical Chemistry and Spectroscopy
  • 2005-2009
  • 1995-1999
  • 1975-1979
  • 1970-1974  (276)
  • 1960-1964
  • 1970  (276)
Collection
Keywords
Publisher
Years
  • 2005-2009
  • 1995-1999
  • 1975-1979
  • 1970-1974  (276)
  • 1960-1964
Year
  • 1
    Electronic Resource
    Electronic Resource
    Crystallization kinetics of dilute polyethylene solutions (1970)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 8 (1970), S. 869-882 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The crystallization kinetics of a high molecular weight fraction of linear polyethylene was studied in dilute solutions of p-xylene, n-hexadecane, and decalin by dilatometric methods. For all solvents and temperatures, the experimental isotherms could be quantitatively described by the Avrami formulation for the complete transformation. This result is unique in the realm of polymer crystallization, since marked deviations from this theory are usually observed in more concentrated systems. The Avrami exponent is found to be n = 4 in all cases. The temperature coefficients of the rate constants are indicative of a nucleation controlled process. The data fit either a two-dimensional or three-dimensional nucleation mode, and a discrimination can not be made between these two cases. The interfacial free energies are found to be independent of the solvent medium. It is also shown that, irrespective of the type of nucleation control governing the kinetics, the same type governs the crystallite thickness of the lamella-like crystals that are formed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1970.160080604
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The occurrence of doubly-charged ions in the mass spectra of aromatic amine derivatives (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 4 (1970), S. 237-240 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This paper describes the mass spectra of some di-trimethylsilyl derivatives of aromatic amines. Numerous doubly-charged ions of low relative intensity are found in all spectra. An intense doubly-charged ion is found at m/e [M - 30]/2, whereas the singly-charged counterpart is very small in all cases.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210040127
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Mass spectrometry of the trimethylsilyl derivatives of amino-hydroxy, dihydroxy and dicarboxydiphenyls (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 4 (1970), S. 563-569 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A mass spectrometric study of the trimethylsilyl derivatives of a group of amino-hydroxy, dihydroxy and dicarboxydiphenyls has disclosed that these compounds produce a number of intense doubly-charged ions ([M - 30]/2, 5 to 27%), for which the singly-charged ions are low or absent. The derivative of 4,4′-dicarboxydiphenyl yields five such doubly-charged ions with relative intensities ⋝ 3%. The fragmentation pathways for this compound have been studied by the formation and mass spectrometry of the trimethylsilyl-d9 derivative.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210040157
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Etude de Steroïudes Fluorés par Spectrométrie de Masse - I: Dérivés des Fluoro-3 Androstenes-5(10) (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 4 (1970), S. 343-352 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A series of 6-β substituted derivatives of α and β 3-fluoro 17β-hydroxy (or acetoxy)-5(10) estrene were studied by mass spectrography. The influence of the substitution as also the stereochemistry of fluorine were discussed.
    Notes: Une série de dérivés substitués en 6β des fluoro-3α et β hydroxy ou acétoxy-17β estrénes-5(10) a été étudiée par spéctrographie de masse. L'influence de la substitution ainsi que la stéréochimie du fluor ont été discutées.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210040136
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  • 5
    Electronic Resource
    Electronic Resource
    Etude de Steroïdes fluorés par Spectrometrie de Masse - II. Dérivés des Fluoro-3 Androstenes-5 (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 4 (1970), S. 353-359 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The study of 19-substituted derivatives of α and β3-fluoro 17β acetoxy 5-androstene shows important differences in the fragmentation pattern according to the substitution and to the stereochemistry of the fluorine.
    Notes: L'étude de dérivés substitués en 19 des fluoro-3 α et β acétoxy-17β androsténe-5 montre des différences importantes dans la fragmentation selon la substitution et selon la stéréochimie du fluor.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210040137
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  • 6
    Electronic Resource
    Electronic Resource
    Reactions of aliphatic aldehydes under electron-impactOrganic Ions in the Gas Phase - XXIV. For paper XXIII in this series, see reference 22b. (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 3 (1970), S. 689-707 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of hexanal, heptanal and nonanal variously labeled with deuterium confirm γ-hydrogen migration and β cleavage as the mechanism leading to [C2H4O]+· and [M — C2H4O]+·, although the data on the latter are complicated by contributions from other, related paths. In addition, they show that three other major primary decomposition products, [M — C2H4]+·, [M — H2O]+· and [C3H5O]+, all arise in large part by processes involving γ-hydrogen migration to the oxygen atom. The ethylene lost to yield the first of these products consists of the α and β methylene groups. The loss of ethylene most likely occurs by way of a cyclobutanol intermediate, which, via alternative reaction paths, may well contribute to the yields of the other two products as well. These findings further extend the range of parallelism between photochemical and electron-impact-induced reactions.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210030602
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  • 7
    Electronic Resource
    Electronic Resource
    Loss of carbon dioxide in the mass spectra of some partially fluorinated β-diketonato iron chelates (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 3 (1970), S. 1255-1258 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Evidence suggesting elimination of carbon dioxide as a decomposition path for tris(1-phenyl-4,4,4-trifluoro-1,3-butandionato) iron (III) [Fe(btac)3] and tris (1-thienyl-4,4,4-trifluoro-1,3, butandionato) iron (III) [Fe(ttac)3] is presented and discussed. A mechanism is proposed for this reaction. Other examples of CO2 elimination are observed for substituted phenyl Fe(btac)3, tris(1-cyclopropyl-4,4,4-trifluoro-1,3-butandionato) iron (III) and Co(III) (btac)3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210031005
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  • 8
    Electronic Resource
    Electronic Resource
    Uses of electron paramagnetic resonance in studying fracture (1970)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 8 (1970), S. 237-252 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The uses of electron paramagnetic resonance (EPR) in studying aspects of polymer fracture are discussed. The sensitivity of EPR is such that all phases of fracture are not amenable to investigation by these means. This paper attempts to define those areas where the authors' experience would indicate that success might or might not be expected. A discussion of the difference between the tensile fracture of drawn polymer fibers, in which strong signals are obtained, and cast and molded materials is given.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1970.150080122
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  • 9
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    Why go to the outer planets (1970)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Scientific motivation for outer planets exploration covering solar system clues, atmosphere comparisons with earth, radiation and planetary radii measurement, etc
    Keywords: SPACE SCIENCES
    Type: ; ADEMIE DES SCIENCES
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    S-band occultation experiment for Mariner Mars 1971 (1970)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: S band occultation experiment for Mariner Mars 1971 orbiters, measuring atmospheric density and ionospheric electron density profiles
    Keywords: SPACE SCIENCES
    Type: ; YAL SOCIETY (
    Format: text
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    NASA TECHNICAL REPORTS
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