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  • Chemistry  (88)
  • 1995-1999
  • 1955-1959  (88)
  • 1950-1954
  • 1955  (88)
  • 1
    Electronic Resource
    Electronic Resource
    Komplexkolorimetrie des Aluminiums (1955)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 67 (1955), S. 178-178 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19550670605
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  • 2
    Electronic Resource
    Electronic Resource
    A comparison of the dynamic properties of natural rubber and GR-SThe work discussed herein was performed as part of the research project sponsored by the Reconstruction Finance Corporation, Office of Synthetic Rugber, in connection with the Government Synthetic Rubber Program. (1955)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 18 (1955), S. 245-256 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The dynamic moduli and loss factors have been determined for high molecular samples of GR-S and natural rubber. Comparison of the two sets of data shows that the general characteristics of the two materials are quite similar. The main differences are that GR-S shows a higher temperature for the apparent second order transition, and also a higher value for the modulus in the relatively level portion of the highly elastic region. The usual superposition procedures are used for correlating the data. Several indications that the equivalence of frequency and temperature may not be of universal applicability are noted. It is suggested that the higher elastic plateau modulus of GR-S my, in conjunction with usual levels of vulcanization, lead to a modulus dispersiion with its attendant loss and thus be a contributing factor to the lower resilience and higher heat development characteristic of GR-S.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1955.120188808
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  • 3
    Electronic Resource
    Electronic Resource
    A viscosity study of polyelectrolytes in the presence of added salts (1955)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 18 (1955), S. 479-490 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The effect of various added simple electrolytes upon the solution viscosity of polymethacrylic acid and hydrolyzed polyacrylonitrile was studied. The viscosity behavior of these polymers in water and in the presence of added NaCl was typical of that of polyelectrolytes. The addition of multivalent anions (sulfate, diacid phosphate, oxalate, and succinate) to solutions of polymethacrylic acid decreasesd the viscosity at low added salt concentrations, but a reversal in the reduced viscosity-concentration curve was obtained as the ionic strength was increased. This increase in viscosity can be partly explained on the basis of increased ionization originating from the behavior of the added multivalent anions. However, this is not the complete explanation since the relative efficiency of these anions in increasing the viscosity is not consistent with the values of the dissociation constants. A possible alternative explanation involves the formation of associated complexes of the polyions. It is further demonstrated that the limiting intrinsic viscosities at infinite ionic strength is dependent upon the initial polymer charge.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1955.120189004
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  • 4
    Electronic Resource
    Electronic Resource
    Stoffwechselprodukte von Actinomyceten. 1. Mitteilung. Narbomycin (1955)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 38 (1955), S. 935-942 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus dem Kulturfiltrat von Streptomyces narbonensis n. sp. wurde ein neues lipophiles kristallines basisches Antibioticum C28H47O7N, das Narbomycin, isoliert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19550380412
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  • 5
    Electronic Resource
    Electronic Resource
    Stoffwechselprodukte von Actinomyceten. 3. Mitteilung. Nonactin (1955)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 38 (1955), S. 1445-1448 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus Kulturfiltrat und Mycel eines Streptomyces viridochromogenes oder Streptomyces olivochromogenes nahestehenden Streptomyceten wurde neben Actidion eine neutrale, farblose, kristalline Verbindung C30H48O9, das Nonactin, isoliert, die chemisch wenig reaktiv ist und gegenüber den untersuchten Mikroorganismen unwirksam oder nur schwach wirksam war.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19550380617
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  • 6
    Electronic Resource
    Electronic Resource
    Stoffwechselprodukte von Actinomyceten. 2. Mitteilung. Angolamycin (1955)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 38 (1955), S. 1202-1209 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus dem Kulturfiltrat von Streptomyces eurythermus n. sp. konnte ein neues lipophiles kristallines basisches Antibioticum C50±1H89±2O18N, das Angolamycin, isoliert werden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19550380515
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  • 7
    Electronic Resource
    Electronic Resource
    Transport of momentum and energy in a ducted jet: III. Correlation of profiles of total momentum and energy flux in a nonisothermal jet discharging into a duct (1955)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 1 (1955), S. 69-73 
    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 data in the first paper of this series on the distribution of momentum and energy in nonisothermal air streams mixing in a straight duct were correlated by the methods described in the second paper. Mixing indexes were evaluated and used to correlate profiles of total momentum and stagnation temperature at various sections of the duct.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690010110
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  • 8
    Electronic Resource
    Electronic Resource
    Transport of momentum and energy in a ducted jet: I. Experimental study of a nonisothermal jet of air discharging into a duct (1955)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 1 (1955), S. 55-61 
    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: A heated jet of air from an 0.898-in. standard A.S.M.E. nozzle was discharged into a 4-in. steel duct, well insulated over its entire 10-ft. length. Air from the region surrounding the nozzle was entrained into the duct. At a number of points along the duct, radial profiles of air velocity and temperature were obtained by means of a probe which combined an impact tube and a thermocouple. The temperature at each of several points along the duct wall was indicated by thermocouples imbedded in the wall.In the experiments reported here the velocity at the jet was 585 ft./sec.; the temperature of the jet was about 220°F. and that of the entrained air was about 88°F. The total air flow rate through the duct was 0.67 lb./sec., and the heat flux was 4.9 B.t.u./sec., with the temperature of the entrained air taken as the datum.The radial and axial profiles of velocity and temperature are compared and discussed; the temperatures of the stream near the duct wall and of the duct wall itself are given. Conservation of mass and heat was checked by graphical integration of the radial profiles.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690010108
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  • 9
    Electronic Resource
    Electronic Resource
    Transport of momentum and energy in a ducted jet: II. Theoretical study of turbulent transport of momentum, energy, and matter in ducted coaxial streams (1955)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 1 (1955), S. 61-69 
    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: This paper concerns the kinetics of the processes that take place when a high-velocity jet of fluid mixes turbulently with a low-velocity, induced stream of the same fluid in a duct of uniform diameter. Semi-two-dimensional solutions of the equations of transport involving two empirical coefficients were obtained by application of Reichardt's hypothesis and three assumptions: (a) a negligible fraction of the flow entity (energy, mass, or momentum) is lost at the wall and the presence of the boundary layer may be ignored, (b) the static pressure is uniform over a section of the duct, and (c) the turbulence pattern is similar to that in free jets except that the duct wall limits the growth of the scale of the turbulence. A mixing index, which is a measure of the degree to which the jet stream remains unmixed with the induced stream at any point, was defined and related to the geometry of the system and the flow parameters by means of the theoretical equation, and a method of evaluating the empirical coefficients for a typical case of momentum transport was described.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690010109
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  • 10
    Electronic Resource
    Electronic Resource
    Laws of corresponding states (1955)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 1 (1955), S. 74-77 
    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: Various laws of corresponding states are examined briefly in this paper to show the corrections that are in common use to increase the accuracy of forecasting compressibility factors. Two trends are noticeable: (I) the use of specific compressibility charts with the results generalized for all gases either by corrections related to z (the compressibility factor at the critical point) or by the use of pseudocritical properties and (2) the use of a true generalized chart based upon averaged data. It is shown that the selection of the plot parameters affects the accuracy of the generalized chart. In recent years reduced parameters based upon kinetic theory have been proposed but for a restricted class of gases (nonpolar gases with spherically symmetrical molecules and negligible quantum effects). It is shown that the kinetic parameters are directly related to the critical constants and also that the kinetic parameter charts can be used for all gases without serious loss of accuracy.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690010111
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