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By Vincent S. Chang, Mark T. Holtzapple (auth.), Mark Finkelstein, Brian H. Davison (eds.)

153 posters. whereas plant biotechnology for enzyme creation and dressmaker biomass merged as "hot issues" in the course of the Symposium, the preface for every consultation is incorporated within the introductions. distinct subject discussions have been led on "Brazilian Bioethanol growth" by way of Gisella Zanin, kingdom collage of Maringa, Brazil, and on "Nontradi­ tional Bioprocessing" via Gene Petersen, nationwide Renewable power Labo­ ratory, Golden, CO. A journey of the Colorado Bioprocessing middle, a "state of the paintings" con­ tract learn facility at Colorado country college highlighted the method improvement and scale-up actions ongoing with numerous business consumers. The 1999 Charles D. Scott Award for extraordinary Contributions within the box of Biotechnology for Fuels and chemical substances was once provided to Dr. Charles E. Wyman, Dartmouth university professor, Thayer university of Engineering, Hanover, New Hampshire. This award is called in honor of Dr. Charles D. Scott, the founding father of this Symposium and its chair for the 1st ten years.

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Read or Download Twenty-First Symposium on Biotechnology for Fuels and Chemicals: Proceedings of the Twenty-First Symposium on Biotechnology for Fuels and Chemicals Held May 2–6, 1999, in Fort Collins, Colorado PDF

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Additional resources for Twenty-First Symposium on Biotechnology for Fuels and Chemicals: Proceedings of the Twenty-First Symposium on Biotechnology for Fuels and Chemicals Held May 2–6, 1999, in Fort Collins, Colorado

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3 times, respectively, indicating that deacetylation had more significant effects on hemicellulose digestibility than on cellulose digestibility. This observation agrees with Applied Biochemistry and Biotechnology Vol. ':---+-~\I AMORPHOUS CELLULOSE Fig. 8. A schematic model for the effects of lignin, acetyl groups, and crystallinity on enzymatic hydrolysis. the findings of Grohmann et aL (34) for poplar wood and wheat straw. 9 times, respectively. Clearly, glucan and xylan hydrolysis responds differently to structural features.

As a result, several kilograms to several tons of toxic products (depending on reactor size and feed rate) may be pumped to the fermentation train. This could poison the fermentation train and cause downtime and operating losses owing to disposal costs. However, if an on-line method for monitoring and control of the pretreatment reactor is available, ethanol production can be increased by maximizing the amount of hemicellulosic sugars available for fermentation and reducing losses caused by poisoning of the fermentation train with toxic furfural and HMF from too harsh a pretreatment.

O ~o U ~ 20 15 ~ (f) ~ 10 Acetyl Content: • o "r ..... I(%) Fig. 7. 8%). may finish the job in time, but slow-working enzymes may not; in this case, enzyme effectiveness becomes important to the ultimate extent of hydrolysis. Responses of Glucan and Xylan to Structure Changes Figure 9 shows the effects of acetyl and lignin removals on 3-d glucan and xylan conversions. 3 times, respectively, indicating that deacetylation had more significant effects on hemicellulose digestibility than on cellulose digestibility.

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