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  • 1
    Electronic Resource
    Electronic Resource
    Halogenierte Pyridine III. Di- und trihalogenierte Pyridin-3-aldehyde (1976)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 59 (1976), S. 211-221 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Halogenated pyridines III. Di- and trihalogenated pyridine-3-aldehydes.Three methods for the preparation of new ring chlorinated pyridine-3-aldehydes are investigated. Reactions of the new aldehydes are reported.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19760590123
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Halogenierte Pyridine II. Reaktionen der 3-Halogenmethyl-pyridine (1976)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 59 (1976), S. 190-211 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Halogenated pyridines II. Reactions of 3-halogenomethyl-pyridines.The facile syntheis of 3-halogenomethyl-pyridines provides an easy access to a variety of new 2, 6-di- and 2, 5, 6-trihalogented pyridines with various functional groups in the 3-position of the pyridine ring. Substitution reactions of the 3-halogenomethyl groups, their Friedel Crafts reactions, and nitrations of the halogenated pyridine ring are reported.
    Additional Material: 9 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19760590122
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  • 3
    Electronic Resource
    Electronic Resource
    Silylierungsprodukte von Harnstoff-Formaldehyd-Kondensaten (1976)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 318 (1976), S. 697-701 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19763180420
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  • 4
    Electronic Resource
    Electronic Resource
    Polarographische Reduktion von β-Aminovinyliminen der Indenreihe (1978)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 320 (1978), S. 270-278 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polarographic Reduction of β-Aminovinylimines of the Indene SeriesThe mechanism of electrolytic reduction of aminovinylimine (AVI) is suggested, based on results of the identification of electrolysis products and on the dependence of polarographic curves. It is shown that this mechanism becomes complicated by the kinetics of hydrolysis of starting substances and intermediates. The determination of complex forming constants for AVI and bovine serum albumine is determined and compared by polarography and spectroscopy.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19783200214
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  • 5
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    AR-39Ar-40 dating of basalts and rock breccias from Apollo 17 and the malvern achondrite (1977)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The principles and the potential of the Ar-39/Ar-40 dating technique are illustrated by means of results obtained for 12 Apollo 17 rocks. Emphasis is given to methodical problems and the geological interpretation of lunar rock ages. Often it is ambigious to associate a given lunar breccia with a certain formation, or a formation with a basin. In addition, large-scale events on the Moon have not necessarily reset radiometric clocks completely. One rock fragment has a well-defined plateau age of 4.28 b.y., but the ages of two Apollo 17 breccias define an upper limit for the formation age of the Serenitatis basin at 4.05 b.y. Ages derived from five mare basalts indicate cessation of mare volcanism at Taurus-Littrow approximately 3.78 b.y. ago. Ca/Ar-37 exposure ages show that Camelot Crater was formed by an impact approximately 95 m.y. ago. After a short summary of the lunar timetable as it stands at the end of the Apollo program, we report about Ar-39/Ar-40 and rare gas studies on the Malvern meteorite. This achondrite resembles lunar highland breccias in texture as well as in rare-gas patterns. It was strongly annealed at some time between 3.4 and 3.8 b.y. ago. The results indicate that very similar processes have occurred on the Moon and on achondritic parent bodies at comparable times, leading to impact breccias with strikingly similar features, including the retention of rare-gas isotopes from various sources.
    Keywords: ASTROPHYSICS
    Type: NASA, Washington The Soviet-Am. Conf. on Cosmochem. of the Moon and Planets, Pt. 2; p 525-540
    Format: application/pdf
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  • 6
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    A single-star interpretation of Nova Cygni 1975 (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Observational evidence has revealed that Nova Cygni 1975 is not a typical nova event. We suggest that Nova Cygni is to be understood, not in terms of a canonical close binary system, but essentially as a single star undergoing a thin-shell thermonuclear explosion.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; 208; Aug. 15
    Format: text
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  • 7
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    On the white dwarf HZ 43 as an extreme-ultraviolet source (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: It is confirmed by atmospheric modeling that both the visual continuum and the XUV spectrum (60 to 600 A) of HZ 43 can be fitted self-consistently with the emergent flux from a stellar atmosphere having an effective temperature of about 125,000 K and log g of at least 7. An examination of theoretical white-dwarf cooling sequences and estimates of the stellar luminosity indicate that the parameters of HZ 43 are consistent with a hot white dwarf of 0.6 to 1.2 solar masses. The age is estimated to be as short as 100,000 years, raising the possibility that the star may have ejected a planetary nebula or may be surrounded by an expanding H II region. It is concluded that the detection of a planetary nebula shell or an H II region around HZ 43 may provide an astrophysical test of the direct neutrino-electron interaction.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; 206; June 15
    Format: text
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  • 8
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    The far-ultraviolet spectrum of Sirius B from Copernicus (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal; 207; July 1
    Format: text
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