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  • Wiley-Blackwell  (3,478)
  • National Academy of Sciences  (1,056)
  • 1965-1969  (4,116)
  • 1935-1939  (418)
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Keywords
Publisher
Years
Year
  • 11
    Electronic Resource
    Electronic Resource
    Effectiveness factors in a nonisothermal reaction system (1965)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 11 (1965), S. 636-643 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Hydrogenation rates of ethylene on a copper-magnesium oxide catalyst were measured for fine catalyst particles and ½ in. spherical pellets from 60° to 160°C. Experimental effectiveness factors for this exothermic reaction system ranged from 0.2 to 25, depending upon the temperature and density of the catalyst pellets. The activation energy for the particles was 11,800 cal./g. mole (above 120°C.), while E for the pellets decreased to zero at high temperatures. Reasons for this behavior are discussed.The effective thermal conductivity of the catalyst pellets was measured as a function of density and the effective diffusivity was estimated from pore size and pore volume measurements. In principle this information and the rate data for the particles are sufficient to predict effectiveness factors for the pellets. However available prediction methods are based upon first or second order rate equations which do not fit the ethylene hydrogenation reaction.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690110414
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  • 12
    Electronic Resource
    Electronic Resource
    The application of the Geddes fractionation index to crude distillation units (1966)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 12 (1966), S. 432-437 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The degree of separation effected by a fractionator can be measured by a fractionation index n. The index is the equivalent number of theoretical plates, operating at total reflux, which would effect the same component separation as the fractionator.The value of the fractionation index is readily calculated from the Fenske-Underwood equation when component analyses of the feed and products are available.In the case of crude oils, the number of components is so great that resolution in the laboratory is not practicable, and the feed and products are customarily analyzed by high efficiency laboratory fractionators which give their true boiling point characteristics. In this form, the data have been broken down into short fractions which have then been treated as pseudo components in subsequent column calculations.This paper presents a method for treating the product TBP curves as algebraic functions without the necessity for breaking the feed TBP data into arbitrary short fractions. The fractionation index can be derived directly from product TBP data, or the TBP data can be calculated when the fractionation index is known.Data from performance tests on three commercial units have been analyzed. The TBP distillation analyses of the crude oils and the products enabled the fractionation indices pertaining to each section of the fractionators to be evaluated.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690120309
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  • 13
    Electronic Resource
    Electronic Resource
    Neuere Methoden der präparativen organischen Chemie VIDie Beiträge dieser Reihe sind gesammelt in fünf Bänden im Verlag Chemie, Weinheim/Bergstr., erschienen. Sie liegen auch in englischer Ausgabe vor. - Dieser Beitrag wird - erweitert um präparative Vorschriften - in Band VI der Reihe erscheinen.. Diazogruppen-Übertragung (1967)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 79 (1967), S. 786-801 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Arensulfonylazide, und zwar vorzugsweise p-Tosylazid, reagieren mit Verbindungen, die aktive Methylengruppen aufweisen, in Gegenwart einer Base formal unter Austausch einer Diazogruppe gegen zwei Wasserstoffatome, wobei Diazoverbindungen neben Arensulfonsäureamiden entstehen. Die Methode eignet sich zur Synthese der Diazoderivate von Cyclopentadienen, Cyclohexadienen, 1,3-Dicarbonyl-, 1,3-Disulfonyl- und 1,3-Ketosulfonyl-Verbindungen, von Ketonen, Carbonsäureestern und ß-Iminoketonen. Folgereaktionen der Diazosynthese können zu Azoverbindungen und Heterocyclen wie 1,2,3-Triazolen, 1,2,3-Thiadiazolen und Pyrazolin-4-onen führen. Azidiniumsalze reagieren nach dem gleichen Schema, aber im sauren Bereich, was zuweilen Vorteile bringt.
    Additional Material: 11 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19670791707
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  • 14
    Electronic Resource
    Electronic Resource
    Röntgenstrukturanalyse von Tri-μ-chlorobis[bis(tri-n-butylphosphin)ruthenium-chlorid] (1968)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 80 (1968), S. 116-117 
    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.19680800306
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  • 15
    Electronic Resource
    Electronic Resource
    Antamanid. Seine Entdeckung, Isolierung, Strukturaufklärung und Synthese (1968)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 80 (1968), S. 209-213 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Als Antamanid bezeichnen wir einen Inhaltsstoff des grünen Knollenblätterpilzes, Amanita phalloides, der an der weißen Maus die tödliche Wirkung der Amanitatoxine Phalloidin und α-Amanitin bei spätestens gleichzeitiger Verabreichung aufhebt. Die Konzentration im Pilz ist allerdings so gering, daß dessen Giftwirkung überwiegt. Antamanid ist ein cyclisches Dekapeptid aus den L-Aminosäuren Alanin, Phenylalanin, Prolin und Valin, die zueinander im Molverhältnis von 1:4:4:1 stehen. Die Sequenz wurde durch Gaschromatographie-Massenspektrometrie aufgeklärt. Die Synthese auf einem klassischen Weg der Peptidchemie bewies die Richtigkeit der Strukturformel.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19680800602
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  • 16
    Electronic Resource
    Electronic Resource
    Light scattering from PVC solutions (1967)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 5 (1967), S. 1305-1308 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1967.160050626
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  • 17
    Electronic Resource
    Electronic Resource
    Determination of the binding of tetraalkylammonium bromides to gelatin by an ultracentrifuge method (1968)
    New York : Wiley-Blackwell
    Biopolymers 6 (1968), S. 767-770 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1968.360060510
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  • 18
    Electronic Resource
    Electronic Resource
    Photopolymerization studies: I. Polymers from new photoredox catalyst systemPresented at the SPE First Technical Conference on Photopolymers, Ellenville, N. Y., November 5-7, 1967. (1969)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 9 (1969), S. 40-48 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A new photoredox catalyst is described wherein a phenothiazine dye in its excited state oxidizes a catalyst to a free radical. This free radical efficiently initiates the polymerization of metal acrylates giving rise to polymers which are insoluble in the monomer-containing medium. The polymers precipitate as insoluble colloidal particles. Optical transmission measurements are used to follow the polymerization and to calculate the number and size of the polymer particles. The effect of various factors such as the nature of the catalyst and the photooxidant, the pH and the temperature of the medium on photopolymerization are described. It is indicated that this new system may be useful for rapid photographic imaging and display applications.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760090107
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  • 19
    Electronic Resource
    Electronic Resource
    Infrared study of poly(vinyl fluoride) (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 401-414 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Poly(vinyl fluoride) polymers prepared at different polymerization temperatures have been examined in the melt, oriented, and solid state by infrared spectroscopy. Bands arising from the head-to-tail and head-to-head-tail-to-tail portions of the polymer have been isolated and assigned. The head-to-head-tail-to-tail portion of the polymer crystallizes in the head-to-tail unit cell except for a portion of the 1,2-difluorethylene units which apparently have the gauche (out-of-plane) structure. The head-to-tail portion of the polymer is nearly atactic, but is somewhat rich in syndiotactic chain structure. Bands arising from local syndiotactic order are observed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040310
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  • 20
    Electronic Resource
    Electronic Resource
    Methyl α-cyanoacrylate. II. Copolymerization studiesPresented in part at the 136th Meeting of the American Chemical Society, Atlantic City, New Jersey, September 1959. (1965)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 9 (1965), S. 429-437 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Copolymerization of methyl alpha;--cyanoacrylate with five reference monomers gave values e = +2.1 and of log Q = 0.65, with much scatter in the latter value. Alternating copolymers are formed by copolymerization with monomers of e = -0.8 or less. Bulk copolymerization with such monomers could not be accomplished, as a rapid noncatalyzed polymerization occurred upon mixing even at 0°C. Random copolymers with methyl methacrylate could be prepared in bulk; those with ca. 10% methyl methacrylate had physical properties similar to the homopolymer of methyl α--cyanoacrylate, except that the heat distortion temperature was lowered 10-15°C. The alternating copolymers were more thermally stable than the random copolymers. Glass temperature values for alternating copolymers do not appear to agree with values predicted from equations for random copolymers.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1965.070090204
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