@article{corbett_knoll_venditti_jameel_park_2020, title={Fiber fractionation to understand the effect of mechanical refining on fiber structure and resulting enzymatic digestibility of biomass}, volume={117}, ISSN={0006-3592 1097-0290}, url={http://dx.doi.org/10.1002/bit.27258}, DOI={10.1002/bit.27258}, abstractNote={Abstract Mechanical refining results in fiber deconstruction and modifications that enhance enzyme accessibility to carbohydrates. Further understanding of the morphological changes occurring to biomass during mechanical refining and the impacts of these changes on enzymatic digestibility is necessary to maximize yields and reduce energy consumption. Although the degree of fiber length reduction relative to fibrillation/delamination can be impacted by manipulating refining variables, mechanical refining of any type (PFI, disk, and valley beater) typically results in both phenomena. Separating the two is not straightforward. In this study, fiber fractionation based on particle size performed after mechanical refining of high‐lignin pulp was utilized to successfully elucidate the relative impact of fibrillation/delamination and fiber cutting phenomena during mechanical refining. Compositional analysis showed that fines contain significantly more lignin than larger size fractions. Enzymatic hydrolysis results indicated that within fractions of uniform fiber length, fibrillation/delamination due to mechanical refining increased enzymatic conversion by 20–30 percentage points. Changes in fiber length had little effect on digestibility for fibers longer than ~0.5 mm. However, the digestibility of the fines fractions was high for all levels of refining even with the high‐lignin content.}, number={4}, journal={Biotechnology and Bioengineering}, publisher={Wiley}, author={Corbett, Derek B. and Knoll, Charlie and Venditti, Richard and Jameel, Hasan and Park, Sunkyu}, year={2020}, month={Jan}, pages={924–932} }
 @article{corbett_hong_venditti_jameel_park_2019, title={Hydrophobic resin treatment of hydrothermal autohydrolysate for prebiotic applications}, volume={9}, ISSN={2046-2069}, url={http://dx.doi.org/10.1039/C9RA06018A}, DOI={10.1039/c9ra06018a}, abstractNote={The production of a high-value xylooligosaccharide (XOS) prebiotic product from lignocellulosic autohydrolysate requires processing for the removal of non-carbohydrate components such as lignin and furfural. In this research, the nature of XOS dissolved in autohydrolysate is evaluated including the XOS degree of polymerization (DP) distribution and potential covalent association between XOS and lignin (LCC). The impact of these factors on the yield of XOS during treatment of Miscanthus autohydrolysate with hydrophobic resin is assessed. Over 30% of the XOS in autohydrolysate was found to be likely associated with lignin (“tied” XOS), all of which was removed during hydrophobic resin treatment along with over 90% of the dissolved lignin. However, loss of dissolved XOS during resin treatment was found to not be due solely to XOS association with lignin. Over 50% of the “free,” non-lignin-associated XOS was also removed by resin treatment. Interaction between “free” XOS and the hydrophobic resin was found to be highly dependent on DP with higher DP XOS being removed far more readily than low DP XOS. Over 80% of dissolved “free” XOS with a DP of six and above (X6+) was removed from autohydrolysate during treatment while only 17% of xylose (X1) was removed. Efforts to understand the interaction between the hydrophobic resin and XOS and to improve the recovery of XOS during hydrophobic resin treatment are presented.}, number={55}, journal={RSC Advances}, publisher={Royal Society of Chemistry (RSC)}, author={Corbett, Derek B. and Hong, Changyoung and Venditti, Richard and Jameel, Hasan and Park, Sunkyu}, year={2019}, pages={31819–31827} }
 @article{hong_corbett_venditti_jameel_park_2019, title={Xylooligosaccharides as prebiotics from biomass autohydrolyzate}, volume={111}, ISSN={0023-6438}, url={http://dx.doi.org/10.1016/j.lwt.2019.05.098}, DOI={10.1016/j.lwt.2019.05.098}, abstractNote={With an increased awareness of health and wellness, prebiotics have received a great amount of attention recently. In this study, autohydrolyzate from hot water treatment of Miscanthus lignocellulosic biomass was evaluated for its prebiotic effect by fermentation of Lactobacillus brevis strain. The cell growth on raw autohydrolyzate-supplemented media was comparable to the sample grown on glucose until an incubation time of 24 h then gradually declined. Autohydrolyzate contains various inhibitors (25.9% of total dissolved solids) and it was determined that dissolved lignin had a significant inhibitory effect to bacterial growth. When the autohydrolyzate was purified using a hydrophobic resin, purified autohydrolyzate exhibited high bacterial growth (cell density (OD 600) of 4.8) and high acid production (7.7 and 3.1 g/L of lactic and acetic acid, respectively), which was comparable with commercial xylooligosaccharides. In conclusion, mixed oligosaccharides in the autohydrolyzate from Miscanthus have considerable potential as a prebiotic and are comparable with commercial xylooligosaccharides derived products.}, journal={LWT}, publisher={Elsevier BV}, author={Hong, Changyoung and Corbett, Derek and Venditti, Richard and Jameel, Hasan and Park, Sunkyu}, year={2019}, month={Aug}, pages={703–710} }
 @article{corbett_venditti_jameel_park_2018, title={Effect of Mechanical Refining Energy on the Enzymatic Digestibility of Lignocellulosic Biomass}, volume={57}, ISSN={0888-5885 1520-5045}, url={http://dx.doi.org/10.1021/acs.iecr.8b02932}, DOI={10.1021/acs.iecr.8b02932}, abstractNote={Mechanical refining of lignocellulosic biomass has emerged as a promising technology for the improvement of enzymatic hydrolysis yields. Further research is necessary to understand the effects of mechanical refining at different conditions to allow for further optimization of the process. In this research, the impact of refining intensity (specific edge load; kWh/m) is investigated by the use of multiple refining passes to reach equivalent total specific refining energy (SRE) using a 12-in. disk refiner. In addition, the effect of adjusting gap-width vs adjusting consistency to increase refining energy is explored. Results show that enzymatic carbohydrate conversion is a function of SRE, independent of refining intensity. At lower enzyme loadings, gap-width adjustments were observed to be most effective at improving enzymatic digestibility. At higher enzyme loadings carbohydrate conversions leveled-off slightly as SRE increased, implying that there may be an economically optimum degree of refining.}, number={43}, journal={Industrial & Engineering Chemistry Research}, publisher={American Chemical Society (ACS)}, author={Corbett, Derek B. and Venditti, Richard and Jameel, Hasan and Park, Sunkyu}, year={2018}, month={Oct}, pages={14648–14655} }
 @article{corbett_mante_bujanovic_2017, title={Toward valorization of lignin: Characterization and fast pyrolysis of lignin recovered from hot-water extracts of electron-beam irradiated sugar maple}, volume={16}, number={4}, journal={TAPPI Journal}, author={Corbett, D. and Mante, O. and Bujanovic, B.}, year={2017}, pages={213–226} }