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  • 1995-1999  (2)
  • 1965-1969  (3)
  • Chemical Engineering  (4)
  • Biosynthesis
  • 1
    Electronic Resource
    Electronic Resource
    Entstehung von SRS-C in der durchströmten Meerschweinchenlunge durch Phospholipase A (1969)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 262 (1969), S. 124-134 
    Details
    ISSN: 1432-1912
    Keywords: Prostaglandins ; Guinea-Pig Lung ; Phospholipase A ; Cobra Venom ; Biosynthesis ; Prostaglandine ; Meerschweinchenlunge ; Phospholipase A ; Kobragift ; Biosynthese
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung SRS-C tritt in Perfusaten von Meerschweinchenlungen auf, wenn Phospholipase A-haltige Gifte einwirken. Sie wurde aus den Perfusaten angereichert. Die Wirkung von SRS-C beruht im wesentlichen auf Prostaglandinen, z.T. auf Peroxyden. Beide stammen von mehrfach ungesättigten Fettsäuren ab. Die freigesetzten Prostaglandine sind nur z. T. im Gewebe vorgebildet, der größere Teil entsteht neu nach Abspaltung der als Vorstufen dienenden Fettsäuren aus Phosphatiden. In den Lungenphosphatiden selbst wurde Prostaglandin als Bestandteil nicht gefunden.
    Notes: Summary SRS-C appears in perfusates of guinea-pig lungs when the lungs are treated with phospholipase A or venoms containing this enzyme. SRS-C has been concentrated and purified from such perfusates. The biological activity of SRS-C depends mainly on the presence of prostaglandins and to a minor degree also on peroxides. Both compounds originate from unsaturated fatty acids. The liberated prostaglandins are only partially preformed. The bulk of them is formed after cleavage of the precursor acids from tissue phosphatides. Prostaglandins have not been detected as constituents of lung phosphatides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00536823
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  • 2
    Electronic Resource
    Electronic Resource
    Glucose hydrolysis and oxidation in supercritical water (1995)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 41 (1995), S. 637-648 
    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: Glucose hydrolysis and oxidation occurred rapidly in supercritical water at 246 bar and at 425 to 600°C. A diverse set of products, present in the liquid-phase reactor effluent and also subject to hydrolysis, was formed. At 600°C and a 6-s reactor residence time, glucose is completely gasified, even in the absence of oxygen. In the presence of oxygen, destruction of liquid-phase products is enhanced, with none found above 550°C at a 6-s reactor residence time. Major products formed wee acetic acid, acetonylacetone, propenoic acid, and acetaldehyde in the liquid phase, and carbon monoxide, carbon dioxide, methane, ethane, ethylene, and hydrogen in the gas phase. Methane and hydrogen were present among the products at temperatures up to 600°C for reactor residence times of 6 s.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690410320
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  • 3
    Electronic Resource
    Electronic Resource
    Acetic acid oxidation and hydrolysis in supercritical water (1995)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 41 (1995), S. 2108-2121 
    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: Acetic acid (CH3COOH) hydrolysis and oxidation in supercritical water were examined from 425 - 600°C and 246 bar at reactor residence times of 4.4 to 9.8 s. Over the range of conditions studied, acetic acid oxidation was globally 0.72 ± 0.15 order in acetic acid and 0.27 ± 0.15 order in oxygen to a 95% confidence level, with an activation energy of 168 ± 21 kJ/mol, a preexponential factor of 109.9 ± 1.7 and an induction time of about 1.5 s at 525°C. Isothermal kinetic measurements at 550°C over the range 160 to 263 bar indicated that pressure or density did not affect the rate of acetic acid oxidation as much as was previously observed in the oxidation of hydrogen or carbon monoxide in supercritical water. Major products of acetic acid oxidation in (upercriuical water are carbon dioxide, carbon monoxide, methaite, and hydrogen. Trace amounts of propenoic acid were occasionally detected. Hydrolysis or hydrothermolysis in the absence of oxygen resulted in approximately 35% conversion of acetic acid at 600°C, 246 bar, and 8-s reactor residence time. Regression of the limited hydrolysis runs assuming a reaction rate first-order in organic gave a global rate expression with a preexponential factor of 104.4 ± 1.1 and an activation energy of 94 ± 17 kJ/moL.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690410910
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  • 4
    Electronic Resource
    Electronic Resource
    A correlation of the frictional characteristics for turbulent flow of dilute viscoelastic non-Newtonian fluids in pipes (1966)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 12 (1966), S. 522-525 
    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 formula has been determined which satisfactorily represents, for the existing data, the frictional characteristics of the turbulent flow of a dilute viscoelastic non-Newtonian fluid in a pipe. This formula contains two elastic fluid parameters, one of which is strongly dependent on both polymer solute and concentration and the other appears to be a constant and independent of the polymer solutes which were used in this report. A rheometer is proposed based on this formula which should be useful in classifying fluids of this type.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690120323
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  • 5
    Electronic Resource
    Electronic Resource
    Nonisothermal adsorption in fixed beds (1967)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 13 (1967), S. 457-465 
    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: Removal of methane from a helium stream by adsorption on Columbia SXC activated carbon was studied experimentally and theoretically. A mathematical model for the process was developed and the governing differential equations were solved numerically. The model incorporates heat and mass transfer resistances within and around the adsorption particle. Wall effects and moderate heat loss to the surroundings are also included. The required heat and mass transfer correlations were obtained from the literature. Simple expressions were developed to determine the relative resistances for heat and mass transfer within and around the adsorption particles.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690130314
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