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11

Digitale Medien

Conversion of benzylpenicillin to 6-aminopenicillanic acid in a batch reactor and continuous feed stirred tank reactor using immobilized penicillin amidase (1973)

Warburton, D. ; Dunnill, P. ; Lilly, M. D.

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 15 (1973), S. 13-25

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ISSN: 0006-3592

Schlagwort(e): Chemistry ; Biochemistry and Biotechnology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: A rate equation has been derived to describe the hydrolysis of benzylpenicillin to 6-aminopenicillanic acid by penicillin amidase. The integrated from of the rate equation has been shown to predict satisfactorily the progress of the reaction in a batch reactor using either soluble or immobilized penicillin amidase. The rate equation was also used to predict the performance of a continuous feed stirred tank reactor containing immobilized enzyme. There was good agreement with experimental measurements.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/bit.260150103

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12

Digitale Medien

Immobilized enzyme reaction stability: Attrition of the support material (1974)

Regan, D. L. ; Dunnill, P. ; Lilly, M. D.

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 16 (1974), S. 333-343

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ISSN: 0006-3592

Schlagwort(e): Chemistry ; Biochemistry and Biotechnology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: One of the main reasons for immobilizing an enzyme is to enable its reuse, or continuous use, in a reactor. Consequently immobilized enzyme stability is an important factor in enzyme reactor design. The performance of the reactor will decrease if during operation the support material disintegrates into smaller particles that pass out of the reactor system.When β-galactosidase is immobilized by covalent attachment to AE-cellulose, the smaller particles have a higher activity. After subjection of the immobilized enxyme to a shear stress the average particle size decreases and the total enzymic activity increases. A loss of small particles from the reactor, although constituting a small weight percent loss of support, will result in a disproportionately large loss in activity. The relevance of these observations to reactor performance is discussed.

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/bit.260160304

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13

Digitale Medien

Influence of intraparticle diffuisional limitation on the observed kinetics of immobilized enzymes and on catalyst design (1974)

Regan, D. L. ; Lilly, M. D. ; Dunnill, P.

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 16 (1974), S. 1081-1093

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ISSN: 0006-3592

Schlagwort(e): Chemistry ; Biochemistry and Biotechnology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: Numerical solutions to the equations describing simultaneous mass transfer and enzymic reaction within porous spherical particles have been used to examine the effect of enzyme content and other parameters on the kinetic behavior of immobilized enzymes. These solutions have also been compared with experimental data for enzymes immobilized to DEAE-cellulose particles. The influence of particle size and enzyme content on catalyst design is discussed.

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/bit.260160808

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14

Digitale Medien

Mixing by impeller agitation in continuous flow systems containing polysaccharide solutionsPresented at the Annual Meeting of the American Chemical Society Chicago, Illinois, August 26-31, 1973. (1974)

Johnson, D. N. ; Hubbard, D. W.

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 16 (1974), S. 1283-1297

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ISSN: 0006-3592

Schlagwort(e): Chemistry ; Biochemistry and Biotechnology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: System response data for step changes in input tracer concentration have been obtained for two different impeller agitated continuous flow mixing systems containing aqueous polysaccharide solutions. The vessel volumes were 1.6 and 10.9 liters. Polysaccharide concentration, dilution rate, and impeller speed were varied according to a plan devised using dimensional analysis and assuming that bulk motion is the predominant mass transport mechanism in the system. The data show that this is not true and that serious errors may occur if scale-up calculations are based on assuming that bulk motion predominates. Under the operating conditions used, perfect mixing was not observed.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/bit.260160911

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15

Digitale Medien

Nucleate and film pool boiling of ethane-ethylene mixtures (1971)

Wright, R. D. ; Clements, L. D. ; Colver, C. P.

Hoboken, NJ : Wiley-Blackwell

AIChE Journal 17 (1971), S. 626-630

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ISSN: 0001-1541

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: Experimental results are presented for saturated nucleate and film pool boiling heat transfer to ethane, ethylene, and three binary ethane-ethylene mixtures containing approximately 25, 50, and 75 mole % ethylene. Data were obtained at reduced pressures from 0.05 to 0.75. The nucleate boiling data are compared with several predictions; the film boiling data are favorably compared with the Sciance, Colver, and Sliepcevich correlation.

Zusätzliches Material: 11 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/aic.690170327

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16

Digitale Medien

Tubular reactor steady state and stability characteristics. I. Effect of axial mixing (1971)

McGowin, C. R. ; Perlmutter, D. D.

Hoboken, NJ : Wiley-Blackwell

AIChE Journal 17 (1971), S. 831-837

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ISSN: 0001-1541

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: No. Abstract.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/aic.690170412

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17

Digitale Medien

Tubular reactor steady state and stability characteristics. II. Limiting behavior and collocation solution of the radial mixing case (1971)

McGowin, C. R. ; Perlmutter, D. D.

Hoboken, NJ : Wiley-Blackwell

AIChE Journal 17 (1971), S. 837-842

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ISSN: 0001-1541

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: No. Abstract.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/aic.690170413

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18

Digitale Medien

Tubular reactor steady state and stability characteristics. III. Effect of recycle (1971)

McGowin, C. R. ; Perlmutter, D. D.

Hoboken, NJ : Wiley-Blackwell

AIChE Journal 17 (1971), S. 842-849

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ISSN: 0001-1541

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: No. Abstract.

Zusätzliches Material: 12 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/aic.690170414

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19

Digitale Medien

Stability of time-delay systems (1972)

Landis, J. G. ; Perlmutter, D. D.

Hoboken, NJ : Wiley-Blackwell

AIChE Journal 18 (1972), S. 380-384

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ISSN: 0001-1541

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: A direct method is presented for determining both local and regional stability of systems described by nonlinear differential-difference equations. Prediction of stability is with respect to a general class of initial curves. The practical as well as the conservative nature of the procedure is demonstrated by a numerical example.

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/aic.690180221

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20

Digitale Medien

Turbulent drag reduction in fiber-polymer systems: Specificity considerations (1974)

Kale, D. D. ; Metzner, A. B.

Hoboken, NJ : Wiley-Blackwell

AIChE Journal 20 (1974), S. 1218-1219

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ISSN: 0001-1541

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/aic.690200626

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