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  • Inorganic Chemistry  (17,492)
  • Organic Chemistry  (11,878)
  • EARTH RESOURCES AND REMOTE SENSING  (3,277)
  • 1980-1984  (10,189)
  • 1960-1964  (7,004)
  • 1935-1939  (5,323)
  • 1930-1934  (5,940)
  • 1920-1924  (4,191)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Untersuchungen über den Thermischen Zerfall von n-Dodecylcyclopentan in der Gasphase (1982)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 964-972 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Investigations on the Thermal Decomposition of n-Dodecylcyclopentane in the Gas PhaseIn the thermal decomposition of n-dodecylcyclopentane at 670 and 750°C in a laboratory tubular reactor mixtures of hydrogen and 57 and 113 hydrocarbons respectively are formed. The mixtures have been analyzed and identified by capillary gas chromatography and by mass spectrometry. The distribution of the reaction products is used for mechanistic discussions.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19823240615
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Kinetische Untersuchungen zur Pyrolyse von Mono-n-alkyl-cyclohexanen (1983)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 66-74 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Kinetic Investigations of the Pyrolysis of Mono-n-alkyl-cyclohexanesThe thermal decomposition of cyclohexane and six mono-n-alkylcyclohexanes was studied kinetically in a metallic laboratory tubular reactor at 650 to 850°C and atmospheric pressure.Kinetic parameters were found to be a function of length of the alkylic side chain. A comparison with analogous parameters of n-paraffins and the unsubstituted cyclohexane allowed the conclusion that C—C-scission in the alkylic chain is the initial reaction in pyrolysis of n-alkylcyclohexanes followed by radical attacks to all C—H-bonds of the feed molecules.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19833250109
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Über einige physikalisch-chemische Eigenschaften wässeriger Systeme. Natrium Alkylsulfat/P-ToluidinhydrochloridHerrn Prof. Dr. H. Bertsch zum 65. Geburtstage gewidmet (1962)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 15 (1962), S. 216-222 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Im Zusammenhang mit der früher bearbeiteten konduktometrischen Titration oberflächenaktiver Substanzen mit p-Toluidinhydrochlorid wurde die physikalisch-chemische Analyse des Systems Alkylsulfat/p-Toluidinhydrochlorid durch Bestimmung der Leitfähigkeit, Viskosität und deren Abweichungen von der Addierbarkeit durchgeführt. Auf Grund dieser Ergebnisse wurden die untersuchten Systeme als „irrationelle“ angenommen, was bedeutet, daß die charakteristischen Punkte, also die Extrema auf den Kurven der physikalisch-chemischen Eigenschaften  -  Zusammensetzung des Systems, einer stöchiometrischen Zusammensetzung der in der Lösung sich bildenden Verbindungen nicht entsprechen.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19620150309
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  • 4
    Electronic Resource
    Electronic Resource
    Über die Reaktionsfähigkeit des aromatischen Wasserstoffatoms (1936)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 69 (1936), S. 993-997 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19360690514
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  • 5
    Electronic Resource
    Electronic Resource
    Die sterische Hinderung, ein Mittel zur Analyse innermolekularer Kräfte (1935)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 68 (1935), S. 1289-1306 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19350680712
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  • 6
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    Satellite-derived ice data sets no. 1: Antarctic monthly average microwave brightness temperatures and sea-ice concentrations, 1973 - 1976 (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A summary data set concerning 4 years of Antarctic sea-ice conditions was created and is available on magnetic tape. The data were derived from electrically scanning microwave radiometer brightness temperatures and were mapped into a polar stereographic grid enclosing the 50 deg S latitude circle. The grid size varies from about 32 by 32 sq km at the poles to about 28 by 28 sq km at 50 deg S. The microwave brightness temperatures of Antarctic sea ice are predominantly characteristic of first-year ice with an emissivity of 0.92 at 19 GHz frequency. Sea ice concentrations were calculated from the brightness temperature data for each grid element with an algorithm that uses an emissivity value of 0.92 and an ice physical temperature estimate from climatological surface air temperatures. Monthly, multiyear monthly, and yearly maps of brightness temperatures and sea ice concentrations were created for the 4 years, except for 7 months for which useable data were insufficient.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-83812
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
    Electronic Resource
    Electronic Resource
    Die absolute Konfiguration des (-)-Epicatechins (1960)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 43 (1960), S. 1274-1279 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Erschöpfende Ozonisierung von (-)-Epicatechin und Reduktion der optisch aktiven Ozonisierungsprodukte führte zu 2-Desoxy-D-xylit, welcher als Tetraphenylurethan in reiner Form isoliert, charakterisiert und identifiziert wurde. Der von D-Glycerinaldehyd sterisch eindeutig abgeleitete 2-Desoxy-D-xylit enthält die beiden asymmetrischen C-Atome 2 und 3 des (-)-Epicatechins in unveränderter Konfiguration. Für (-)-Epicatechin folgt daraus zwingend die absolute Konfiguration gemäss Formel I, wie sie erstmals von K. FREUDENBERG u. a. durch vergleichende Betrachtung von Drehungsverschiebungen aus der Ephedrin- und Mandelsäure-Reihe abgeleitet wurde.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19600430512
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  • 8
    Electronic Resource
    Electronic Resource
    Über die Reinigung von Elektrodenkohlen für die Spektralanalyse (1935)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 18 (1935), S. 1181-1189 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Es wird gezeigt, dass die Kohleelektroden für die Spektral-analyse sehr wirksam gereinigt werden können, dadurch, dass man einen Flammbogen von ca. 12 Amp. während 2--3 Minuten zwischen denselben brennen lässt in einer Atmosphäre von Argon oder Stickstoff.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.193501801164
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  • 9
    Electronic Resource
    Electronic Resource
    Über die Säurehydrolyse hydroxylhaltiger Carbonsäureamide (1960)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 631 (1960), S. 56-60 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ein Vergleich der Säurehydrolyse von Carbonsäureamiden mit derjenigen von Hydroxycarbonsäureamiden ergab, daß die Verseifungsgeschwindigkeit durch eine α-ständige Hydroxylgruppe kaum, durch eine γ- oder δ-ständige jedoch stark erhöht wird. Es wird ein Vergleich zu Hydroxylysyl-peptiden gezogen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19606310105
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  • 10
    Electronic Resource
    Electronic Resource
    Protonenresonanzspektroskopie und Steroidstruktur I. Das C-19-Methylsignal in Funktion der Substituenten (1961)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 44 (1961), S. 1380-1395 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The proton NMR spectra of 160 known steroids have been measured as 0.1 molar solutions in deutero-chloroform. It is shown that the influences of the different substituents and double bonds on the position of the C-19-methyl-signal are additive to a high approximation. Most chemical shifts can therefore be predicted with an accuracy of ± 0.01 ppm. A table of the additional chemical shifts as a function of the nature and position of the substituents is given, which permits the calculation of the chemical shift of the 19-hydrogen atoms of unknown steroids.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19610440525
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