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  • Chemistry  (8)
  • Wiley-Blackwell  (8)
  • Institute of Physics
  • 2005-2009
  • 2000-2004
  • 1990-1994
  • 1980-1984  (8)
  • 1965-1969
  • 1955-1959
  • 1984  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Analysis of a continuous, aerobic, fixed-film bioreactor. II. Dynamic behavior (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 26 (1984), S. 468-476 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The dynamic analysis of a continuous, aerobic, fixed-film bioreactor has been performed. Rigorous mathematical models have been developed for a fluidized-bed fermentor with biofilm growth. The transient performance of the reactor is appraised in terms of outlet penicillin concentration for constant, as well as variable carbon substrate feed rates. The effect of the reactor oxygen transfer capacity is elucidated for those cases employing substrate feeding strategies. The results show that penicillin production in a continuous, fixed-film bioreactor reaches a maximum with processing time, but subsequently decreases as cell mass accumulates and substrate deficiencies occur. The maximum production level can be maintained for increased operating times if the substrate supply is continuously increased. The duration of this prolonged production is a direct function of the rate of increase and the operating time at which the increase is initiated. The oxygen transfer capacity of the reactor was found to be important to the effectiveness of a feeding strategy.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260260510
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  • 2
    Electronic Resource
    Electronic Resource
    Analysis of a continuous, aerobic, fixed-film bioreactor. I. Steady-state behavior (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 26 (1984), S. 457-467 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The analysis of a continuous, aerobic, fixed-film bioreactor is performed by simulating the behavior of penicillin production in a three-phase fluidized bed. Rigorous mathematical models are developed for a fluidized-bed fermentor in which bioparticles are fluidized by the liquid medium and air. The steady-state performance of the fluidized-bed reactor is appraised in terms of penicillin productivity and outlet concentration by considering the two extremes in contacting patterns, complete back-mix and plug flow, in the absence of a growing biofilm. The results show that the complete back-mix contacting pattern is preferred over that of plug flow due to the nature of the penicillin kinetic relationships. It is also shown that for the dual-nutrient (glucose and oxygen) penicillin reaction system the optimum biofilm thickness does not equal the penetration depth of a limiting nutrient, but depends upon the total reactor configuration.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260260509
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  • 3
    Electronic Resource
    Electronic Resource
    Fractionation with condensation and evaporation in wetted-wall columnsThis paper is not to be reproduced or published in any form without the written permission of the authors. J. F. Davis is now with the Department of Chemical Engineering, The Ohio State University. (1984)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 30 (1984), S. 328-338 
    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 model is presented to describe the behavior of falling film fractionators with evaporation or condensation. Experimental measurements of vapor composition, vapor temperature and wall temperature profiles were made. Close agreement suggests that the model is applicable to both adiabatic and nonadiabatic conditions.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690300223
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  • 4
    Electronic Resource
    Electronic Resource
    Meandering of water rivulets (1984)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 30 (1984), S. 263-267 
    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: Water rivulets are produced on inclined flat plates made of high-density polyethylene, Mylar, Plexiglas and acetate film. Conditions are obtained for straight rivulets to begin to meander and for measuring rivulets to cease their unsteadiness. These critical conditions are correlated using a one-dimensional theory of high Reynolds number slender rivulets in which pressure gradients generated by curvature, surface tensionand contact-angle hysteresis balance.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690300214
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  • 5
    Electronic Resource
    Electronic Resource
    Chemiluminescence of polysiloxane cushions: Correlation with physical propertiesWork performed under the auspices of the U. S. Department of Energy by the Lawrence Livermore National Laboratory under Contract No. W-7405-ENG-48. (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 29 (1984), S. 4439-4442 
    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
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1984.070291276
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  • 6
    Electronic Resource
    Electronic Resource
    Mass spectrometry of 2-substituted-4-arylthiazoles. 3 - identification of microsomal nitroreduction products by mass spectrometry (1984)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 11 (1984), S. 149-154 
    Details
    ISSN: 0306-042X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The electron impact mass spectra of the chemical carcinogens 4-(4-aminophenyl)-2-methylaminothiazole, 4-(4-aminophenyl)-2-methylaminothiazole, and 4-(4-aminophenyl)-2-aminothiazole were studied. The 3-(4-aminophenyl)-2-substituted thiazoles were isolated from the anaerobic microsomal reduction of their respective 4-nitrophenyl analogues. Microsomes prepared from rat and rabbit kidney tissues were used. The identity of the reduction products were established by chemical synthesis and mass spectrometry. The mass spectrometric fragmentation of the nitro derivative shows prominent ions arising from the loss of the nitro group, ring enlargement of the thiazoles, and the phenylthiirene ion resulting from 1,2-cleavage of the thiazole ring. In the 4-(4-aminophenyl)-2-substituted amino derivative prominent ions result from the preferential 1,2-cleavage of the thiazole ring to give the common 2-(4-aminophenyl) thiirene ion and subsequent fragmentation of this ion.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200110402
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  • 7
    Electronic Resource
    Electronic Resource
    Chemical ionization mass spectra of derivatized 1-benzyltetrahydroisoquinoline alkaloids (1984)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 11 (1984), S. 63-67 
    Details
    ISSN: 0306-042X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A study of the chemical ionization mass spectral characteristics of a series of derivatized 1-benzyltetrahy-droisoquinoline alkaloids is presented. Tetrahydropapaveroline and some related benzyltetrahydroisoquinolines were converted to their corresponding O-trimethylsilyl of N-trifluoroacetyl-O-trimethylsilyl derivatives prior to analysis by combined gas chromatographic methane chemical ionization mass spectrometry. The chemical ionization mass spectra of the derivatized alkaloids are compared to the electron impact mass spectra of the N-trifluoroacetyl-O-trimethylsilyl derivative of tetrahydropapaveroline, a representative benzyltetrahydroisoquinoline alkaloid. The effects of the nitrogen substituent and ion source pressure on the relative abundance of significant ions in the chemical ionization mass spectra of these alkaloids are also described.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200110204
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  • 8
    Electronic Resource
    Electronic Resource
    Fast atom bombardment mass spectrometry of non-volatile organometallic compounds. Rhodium, iridium and platinum complexes containing a cumulene ligand (1984)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 19 (1984), S. 107-112 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Fast atom bombardment (FAB) mass spectrometry has been used to examine a series of rhodium, iridium and platinum organimetallic complexes, in which a cumulene ligand is attached to the metal in either σ-or π-bonding fashion. The most intense ion formed in the rhodium and platinum series is the metal-bis(triphenylphosphine) ion, while the [Ir(P(C6H5)3)2CO]+ ion is most intense for the iridium series. The platinum complexes show the most intense molecular ion peaks (up to 35% relative intensity), while the rhodium complexes show the least intense molecular ion peaks. The primary fragmentations of all these complexes occur at the metal-ligand bonds. The cumulenic ligand is lost as an impact unit in all cases. The FAB mass spectra of Rh(P(C6H5)3)3Cl (Wilkinson's catalyst), Ir(P(C6H5)3)2COCl (Vaska's compound), Rh(P(C6H5)3)2COCl and Pt(P(C6H5)3)2(C2H4)-synthetic precursors or related compounds to the organometallic complexes examined here-are included for comparison.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210190302
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