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David J. Gregg
Researcher at University of British Columbia
Publications - 27
Citations - 3895
David J. Gregg is an academic researcher from University of British Columbia. The author has contributed to research in topics: Cellulose & Enzymatic hydrolysis. The author has an hindex of 22, co-authored 27 publications receiving 3778 citations. Previous affiliations of David J. Gregg include Natural Resources Canada.
Papers
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Journal ArticleDOI
Biorefining of softwoods using ethanol organosolv pulping: preliminary evaluation of process streams for manufacture of fuel-grade ethanol and co-products.
Xuejun Pan,Claudio Arato,Neil R. Gilkes,David J. Gregg,Warren Mabee,Kendall Pye,Zhizhuang Xiao,Xiao Zhang,John N. Saddler +8 more
TL;DR: In this paper, the Lignol process was used to extract residual lignin from mixed softwood pulp and then used for bio-convincing the cellulose to glucose and subsequent fermentation to ethanol.
Journal ArticleDOI
Bioconversion of hybrid poplar to ethanol and co-products using an organosolv fractionation process: Optimization of process yields
Xuejun Pan,Neil R. Gilkes,John F. Kadla,Kendall Pye,Shiro Saka,David J. Gregg,Katsunobu Ehara,Dan Xie,Dexter Lam,John N. Saddler +9 more
TL;DR: The influence of four independent process variables (temperature, time, catalyst dose, and ethanol concentration) on product yields was analyzed over a broad range using a small composite design and response surface methodology and generated regression models that describe process responses for any combination of the four variables.
Book ChapterDOI
Effects of Sugar Inhibition on Cellulases and β-Glucosidase During Enzymatic Hydrolysis of Softwood Substrates
TL;DR: This study suggests that high-substrate consistency hydrolysis with supplementation of hemicellulose is likely to be a practical solution to minimizing end-product inhibition effects while producing hydrolysate with high glucose concentration.
Journal ArticleDOI
Strategies to enhance the enzymatic hydrolysis of pretreated softwood with high residual lignin content
TL;DR: In this paper, mild alkali extraction and protein addition were investigated for reducing the effect of residual lignin on enzymatic hydrolysis of cellulose in Douglas fir.
Journal ArticleDOI
Factors affecting cellulose hydrolysis and the potential of enzyme recycle to enhance the efficiency of an integrated wood to ethanol process
David J. Gregg,John N. Saddler +1 more
TL;DR: A comparison of the front end (pretreatment, fractionation, and hydrolysis) of a softwood/hardwood to ethanol process indicated that the lignin associated with the softwood‐derived cellulose stream limited the number of times the cellulose containing residue could be recycled.