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  • Chemistry  (80)
  • Aircraft Design, Testing and Performance  (1)
  • GEOPHYSICS
  • STRUCTURAL MECHANICS
  • 1965-1969
  • 1955-1959  (81)
  • 1950-1954
  • 1940-1944
  • 1958  (81)
  • 1
    Electronic Resource
    Electronic Resource
    Perforated plate efficiency-effect of design and operating variables (1958)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 4 (1958), S. 465-471 
    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: Experimental plate efficiency and pressure drop data were obtained on the n-octane-toluene system in a 5 plate, 6 in. diam. column at atmospheric pressure. Hole sizes of 1/16, 1/8, and 3/16 in.; 5.68 and 12.5% free areas; weir heights of 1, 2, and 3 in.; and plate spacings of 6, 12, 18, and 24 in. were studied. Reflux ratios of one, two, four, five, ten, and total were utilized to determine the effect on efficiency.It was found that hole diameter, free area, plate spacing, and a wide range of reflux ratio had relatively small effect on efficiency and pressure drop; however weir height and lower reflux showed relatively larger effects on both variables.Efficiencies and pressure drops were lower than those predicted from published correlations particularly at low flow rates.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690040416
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  • 2
    Electronic Resource
    Electronic Resource
    Graft interpolymers formed by γ-irradiation of methyl methacrylate-natural rubber mixtures (1958)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 28 (1958), S. 265-274 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: On exposure to Co-60 γ-radiation, mixtures of natural rubber and methyl methacrylate yield almost exclusively rubber-polymethyl methacrylate graft polymers. An appreciable amount of free polymethyl methacrylate is formed only in the presence of a transfer agent or following radiation-induced degradation of the interpolymer. Structural characterization of the products has been made. The findings are not consistent with random grafting of the synthetic polymer on linear rubber molecules of random molecular size distribution - the rubber component appears to comprise several crosslinked molecules. The influence of the purity of the rubber, monomer concentration, field intensity, the presence of transfer agent, and the gel effect on the rate of formation, yield, and structure of the interpolymer are reported.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1958.1202811702
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesen des Heteroauxins, des Tryptamins und des SerotoninsAuszugsweise vorgetragen auf der Vortragstagung der Hans-Fischer-Gesellschaft in München am 19. und 20.9. 1957; vgl. Angew. Chem. 70, 56 [1958] (1958)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 91 (1958), S. 1141-1145 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Kondensation des 1-Acetyl-indoxyls (I) mit Cyanessigsäure führt unter bestimmten Bedingungen zu [1-Acetyl-indolyl-(3)]-acetonitril (II). Aus diesen entsteht durch alkalische Verseifung Heteroauxin (III) und durch Reduktion mit Lithiumaluminiumhydrid, unter gleichzeitiger Abspaltung der N-Acetylgruppe, Tryptamin (IV). Das aus 2-Chlor-5-amino-benzoesäure leicht zugängliche 1-Acetyl-5-benzyloxy-indoxyl (XI) wurde durch analoge Behandlung in Serotonin (XIV) umgewandelt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19580910603
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  • 4
    Electronic Resource
    Electronic Resource
    Über die Inhibition der Korrosion des Eisens im Erdreich (1958)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 9 (1958), S. 73-75 
    Details
    ISSN: 0947-5117
    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: On the Inhibition of the Corrosion of Buried IronThere is a report on some laboratory experiments on the inhibition of the corrosion of buried iron. The results are explained by means of the influences of the physical properties of the soil upon the suppression of the iron corrosion by the inhibitors Na2CrO4, NaNO2 and sodium benzoate.The results allow to recommend the application of inhibitors for uncovered ironpipes.
    Notes: Es wird über Laboratoriumsversuche über die Inhibition der Eisenkorrosion im Boden berichtet. Die Versuchsergebnisse werden gemeinsam mit den physikalischen Eigenschaften des Bodens bezüglich der Unterbindung der Eisenkorrosion im Boden durch die Inhibitoren: Na2CrO4, NaNO2 und Na-benzoat ausgewertet. Auf Grund dieser Ergebnisse wird eine Empfehlung für die Verwendung von Inhibitoren für den Korrosionsschutz von blanken Eisenrohren im Erdreich gegeben.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19580090203
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  • 5
    Electronic Resource
    Electronic Resource
    Vibrationsverfahren zum Nachweis von Veränderungen in Hölzern (1958)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 9 (1958), S. 262-265 
    Details
    ISSN: 0947-5117
    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: Vibration Method to Detect Modifications in WoodThe authors investigated the influence of an impregnation by a synthetic resin or boric acid, a watering and the effects of alkali and mineral acids upon the torsional fatigue strength (modulus of elasticity in shear and logarithmic decrement) of numerous exotic hard and soft wood. While an impregnation makes the modulus of elasticity in shear raise watering and boric acid treatments diminish the logarithmic decrement but cause high torsional fatigue strength. The alkali resistance of numerous wood is generally much lower than their resistance to acids.
    Notes: Die Verfasser studierten den Einfluß einer Imprägnierung mit Kunstharz oder Borsäure, einer Wasserlagerung und der Einwirkung von Lauge und Mineralsäure auf die Torsionsschwingungsfestigkeit (Gleitmodul und logarithmisches Dekrement) zahlreicher exotischer Laub- und Nadelhölzer. Während Kunstharztränkung den Gleitmodul stark erhöht, erniedrigen Wasserlagerung und Borsäurebehandlung das logarithmische Dekrement und erhöhen die Torsionsschwingungsfestigkeit. Die Laugenbeständigkeit der verschiedenen Holzarten ist im allgemeinen erheblich geringer als deren Säurebeständigkeit.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19580090503
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  • 6
    Electronic Resource
    Electronic Resource
    Mass transfer from a soluble solid sphere (1958)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 4 (1958), S. 114-124 
    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: Mass transfer from 3/8- and 1/2-in.-diameter spheres of adipic acid and from 3/8-, 1/2-, 5/8- and 3/4-in.-diameter spheres of benzoic acid into a controlled stream of water passing in laminar flow through a 3-in.-diameter pipe is found to be correlated by the single equaton NSh = 2 + 0.95 NRe0.5 NSc0.33 for sphere Reynolds numbers between 100 and 700. The limitations on the application of this equation, due to mass transfer by natural convection, are discussed. Correlations are also obtained for transfer from separate regions of the sphere surface.Skin-friction-drag coefficients for single fixed spheres have been calculated from reported pressure distributions for Reynolds numbers between 100 and 1,000.Good agreement is obtained between the mass transfer j factor and other reported values for heat transfer, but comparison with the calculated frictional forces indicates that the equality proposed by Colburn (3) does not hold, because the distributions of the mass transfer and the skin friction over the surface differ.
    Additional Material: 17 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690040120
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  • 7
    Electronic Resource
    Electronic Resource
    Pseudocritical constants from volumetric data for gas mixtures (1958)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 4 (1958), S. 494-494 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690040421
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  • 8
    Electronic Resource
    Electronic Resource
    Distribution of eddy viscosity and mixing length in smooth tubes (1958)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 4 (1958), S. 27-32 
    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: Profiles of eddy viscosity and Prandtl mixing length in fluids flowing steadily and isothermally in smooth tubes have been calculated from the velocity data of several investigators for Reynolds numbers between 1.2 × 103 and 3.2 × 106. In the transition range unusually high values of eddy viscosity and mixing length are obtained in some portions of the stream. In the fully turbulent range the effect of Reynolds number is small and the mixing length tends toward zero at the center of the tube. The parameters for turbulent flow between parallel plates have been correlated through the concept of an equivalent tube. The results are of importance in designing equipment for heat and mass transfer and mixing.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690040106
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  • 9
    Electronic Resource
    Electronic Resource
    Prediction of resistance in constant-pressure cake filtration (1958)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 4 (1958), S. 175-180 
    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: Methods of predicting resistance in constant-pressure cake filtration have been classified into three groups, (1) basic particle and cake properties, (2) permeability tests, and (3) small-scale filtration tests. Methods 2 and 3 involve the concept of specific filtration resistance, a property characteristic of each unit mass of deposited cake, and these methods were extensively investigated in the laboratory. Specific resistances for three chemical slurries were determined by laboratory filtrations and filter- and compression-permeability tests. Results of these investigations showed that specific filtration resistance could be predicted from compression-permeability test data.Filtration tests made on commercial-scale equipment operating on pearl cornstarch illustrated the correlation between predicted and actual specific resistance values, the resistance predicted from compression-permeability test data agreeing very well with the actual resistance of the prefilt.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690040211
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  • 10
    Electronic Resource
    Electronic Resource
    Erratum: Heats of vaporization of hydrogen bonded substances (1958)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 4 (1958), S. 493-493 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690040420
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