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I 1 I I I t i 1 O 2 4 6 8 10 12 14 Batc hes + Enzyme (1 ) 4 Enzyme (2) -t Fraction of PBC (1) +Fraction of PBC (2) + Free Cell(1) - Free Cell(2) Figure 6.12. Rdts for Two Repeated Batch Fermentation Experimenb in hmobüaed-Ceil-F'üm Airiift Bioreartor. (Mected Sûdn; Temperature = 30 OC, Aeration Rate = 1.0 W I , Each Batdi Lasted 24 hours). I
Glucoamylase Concentration (unitslL) and Fraction of PBC (%) O 4 4 O ul 8 Free Cell Mass (gk)
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BIOREACTOR STUDIES OF HETEROLOGOUS
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nie University of Waterloo requin%
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ate depended on activities of the p
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Acknowiedgments Fmt of aü, 1 am ve
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2.6. Concluding Rernarks ..........
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5.3.3. Simlilated Results for Prese
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Table 1.1. Table 1.2. Table 1.3. Ta
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Figure 2.1. Figure 3.1. Figure 3.2.
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during Continuous Culture in Airlif
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Figure 5.3. Comparison between Mode
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Cell Systern at Glucose Feed Concen
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a .......... growth ratio (dimensio
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Y, ... ethanol yield for fermentati
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foreign plasmids. One major chalien
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than the denanired, inclusion body
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Table 1.2. Strategies for Enhancing
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Table 1.3. Host Cek, Pfasmids, Gene
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1.4. Immo bilized-Cell Bioreactors
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1. Study the gmwth characteristics,
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plasmid are used; or chromaromal DN
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2.2.1. Genetic Factors 2.2.1.1. Pid
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1- fkquently than a plasmid with Io
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Da Silva and Bailey (1991) used the
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LEU2 or TRPI is cloned into the aux
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eported reduced stabiliity in the s
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on metabolic pathways. In the ferme
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OC), oniy about 35% of the populati
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loss @) is dehned as the probabilit
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+ s Dilution Rate = p' = CI,- - K*+
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concentration couid Iead to coexist
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that factors other than immobiiizat
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earing and plasmid-tke =Ils. Gel be
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productivity irrespective of the mo
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inactive and useless. The problern
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Aerobic fermentation osing iamnobih
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(ranghg h m 1 to 7) on citric acid
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celi fraction decreases monotonicai
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(1987) model aliows for plasmid ins
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affect plasmid stability have ben o
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CEtAPTER 3 MATERIALS AND METHODS 3.
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stiU deleted hm the plasmid. Such p
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1) Reagent solution preparation was
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nonse1ective agar plates, but only
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working Liquid volume. The aeration
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3.5. UNnobilized Ceil Culture 35.1.
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3.52 Cd Lmmobiiization Yeast attach
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3.6. Experimental Error and Reprodu
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-0-Cell(1) +Total CeII (2) 4- Ethan
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* . I I a O 2 4 6 8 10 12 14 Batche
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Cell Maso, Glucose and EthanoI(g1L)
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4.2.2. Batch CuIture in Stirreà-Ta
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[t ~lucoamylase (ALR) -e Glucoamyla
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The finai giucoamyiase concentratio
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Bentley and Kompala, 1989; Satyagal
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160 First ExponenUaI Phase 1 -c ALR
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Figure 4hl. Pathways of Yeast Intem
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fermentation (using nitrogen spargi
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43. Continuous Suspension Culture C
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Figure 4.9. Continuous Suspension C
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1 +Enzyme +Fradlan of PBC +CeIl Mas
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Figures 4.12 and 4.13 show that by
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Fi- 4.13. Cornparison of Glu~iase C
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where 6 = p- - p' + pp*, which is a
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Figure 4-14. Effeds of Dilution Rat
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Impoolsup et ai. (1989a) and Hardji
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Figure 4.16. dB/dt versus B Plots a
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Figure 4.17. Totai Cell Mas at Diff
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another recombinant yeast (impoolsu
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other recombinant yeast under nonse
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4.3.4. Effixt of Dilution Rate On R
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Figure 4.18- Etlects of Mluiioa Rat
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Number of Generations - - - - - - *
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B Table 4.5. Metabolic Pathway Anal
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concentration. But this may be more
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[+ Enzyme (ALR) + Enzyme (STR) +Fra
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necessary for host ce& to grow in t
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Glucoamylase ConcentraUon (unltsll)
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[a Selective Medium A Nonseiective
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5.1 Introduction CHAPTER 5 MODELING
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handle. excess glucose is femented
Page 161 and 162: The carbon fluxes h m the three met
Page 163 and 164: 53. Modei Simulation in Batch CuItu
Page 165 and 166: Table 5.1. Summary of Parameters fo
Page 167 and 168: 1 n Glucose o Cell Mass O Ethano1 A
Page 169 and 170: detennined in the cunent study, the
Page 171 and 172: Figure 5.4. Cornparison between Mod
Page 173 and 174: equations are üsted in Appendix G.
Page 175 and 176: a dilution rate at which the giucoa
Page 177 and 178: [ o Expetfmental data -Simuiated mt
Page 179 and 180: The effixts of dilution rate on the
Page 181 and 182: Ttme (hrs) 1 a Enzyme A Phsrnid-Bea
Page 183 and 184: It may take several generations for
Page 185 and 186: understanding of the nature of the
Page 187 and 188: On the other hand. the net accumula
Page 189 and 190: Differentiating Equation (6.20) res
Page 191 and 192: Enyme collcentration m the t>ioreac
Page 193 and 194: Glucoamylase Concentration (units/L
Page 195 and 196: 50 100 150 200 Time (hrs) 1 O Free
Page 197 and 198: F i 6.6. Cornparison of Fnx Cd Mars
Page 199 and 200: . - O 50 100 150 200 250 nme (hrs)
Page 201 and 202: Nasi et ai.. 1988) and recombinant
Page 203 and 204: estimated by using Equation (6.24)
Page 205 and 206: [a lmmobilked System O Free System
Page 207 and 208: oxidation pathway. W~th increasing
Page 209 and 210: O 50 100 150 200 250 300 Tirne (hrs
Page 211: epeated batch fermentations, the fe
Page 215 and 216: 6) Suitable for repeated-batch and
Page 217 and 218: ecause glucose fermentation dominat
Page 219 and 220: cells. Tests of the proposed model
Page 221 and 222: 7.2. Recommendations The foUowing f
Page 223 and 224: APPENDIX A: PLASMID MAP FOR pGAC9 l
Page 225 and 226: where Bi (Biot number) = - ks De @
Page 227 and 228: APPENDK C. EFFECTS OF INITIAL GLUCO
Page 229 and 230: Figure C.2. Effect of Initial Gluco
Page 231 and 232: Figure C.4 Effect of Initial Glucos
Page 233 and 234: APPENDLX D. COMPARISON OF ORIGINAL
Page 235 and 236: (continue)
Page 237: (continue)
Page 242 and 243: E.2. Batch Fermentation with Recomb
Page 246 and 247: (continue) tfhJ 0.5 10.5 12.75 12.5
Page 250 and 251: E.3.2. Experimental Data (Parker an
Page 252 and 253: Run No: CALE (Selected Strain. D =
Page 254 and 255: Run No: CALR 5 (Original Suain, D =
Page 256 and 257: Run No: CSTR3 (Selected Suain, D =
Page 260 and 261: Run No: CICR2 (Selected Suain, D =
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Run No: CiCR4 (Selected Suain, D =
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Eh. Repeated Batch Culture in hmobi
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APPENDIX F. C CODE FOR THE PROPOSED
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* the initial data */ /* gening the
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* getting the founh term in R-K met
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I*Plasrnid-bearing ceU concentratio
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* Func tion C 1 */ îloat C l(float
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APPEMIM G. EXAMPLES OF MAPLE V CODE
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REFERENCES Ataai. MM. and Shuler. M
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Caunt, P.. hpoolsup, A.. and Greenf
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cuitanes of E. coli BZ18@TG 201) wi
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Gabrieisen. O.S. et aL (1990), Effi
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Huang, C-T., Peretti, S.W., and Bry
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Kim, B.G. and Shuler, M.L. (1990a),
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Lee, S.B.. Ryu, D.D.Y., seigel, R,
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Nasri, M., Sayadi. S.. Barbotin, J.
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Pin, S.J. and Kmwski. W.M. (1970),
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Seo, I-H. and Bailey. J.E. (1985).
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Tumer. B.G., Avgerinos G-C.? Melnic
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Yu, J. and Tang, X (Editor, 1991),
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