ORCID Profile
0000-0003-1521-9155
Current Organisation
University of Louisville
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Publisher: Frontiers Media SA
Date: 13-10-2015
Publisher: Frontiers Media SA
Date: 19-07-2016
Publisher: Elsevier BV
Date: 06-2015
DOI: 10.1016/J.BIORTECH.2015.02.087
Abstract: Municipal solid waste (MSW) represents an attractive cellulosic resource for sustainable fuel production. However, its heterogeneity is the major barrier to efficient conversion to biofuels. MSW paper mix was generated and blended with corn stover (CS). It has been shown that both of them can be efficiently pretreated in certain ionic liquids (ILs) with high yields of fermentable sugars. After pretreatment in 1-ethyl-3-methylimidazolium acetate ([C2C1Im][OAc]), over 80% glucose has been released with enzymatic saccharification. We have also applied an enzyme-free process by adding mineral acid and water directly into the IL/biomass slurry to induce hydrolysis. With the acidolysis process in 1-ethyl-3-methylimidazolium chloride ([C2C1Im]Cl), up to 80% glucose and 90% xylose are released. There is a correlation between the viscosity profile and hydrolysis efficiency low viscosity of the hydrolysate generally corresponds to high sugar yields. Overall, the results indicate the feasibility of incorporating MSW as a robust blending agent for biorefineries.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA09676F
Abstract: Biomass is transformed with CO 2 laser light into a heat setting adhesive achieving direct adhesion without added resins. 90% of the adhesive is composed of partially depolymerized cellulose and lignin.
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3GC37086K
Publisher: Springer Science and Business Media LLC
Date: 21-03-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5GC01083G
Abstract: This paper reports a multiplexed assay for degradation of lignin, and insights into the Fenton reaction with insoluble lignin.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4GC01208A
Abstract: The cost of ionic liquids (ILs) is a barrier to utilization in cellulosic biorefinery pretreatment. Our low-cost [HSO 4 ] − ILs are nearly as efficient as standard [OAc] options.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4GC00373J
Abstract: This study provides new insights into the interplay of water as a co- and/or anti-solvent during ionic liquid (IL) pretreatment of lignocellulose.
Publisher: Wiley
Date: 13-01-2015
DOI: 10.1111/PBI.12310
Publisher: Proceedings of the National Academy of Sciences
Date: 05-07-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3GC40545A
Publisher: American Chemical Society (ACS)
Date: 23-12-2020
Publisher: Frontiers Media SA
Date: 06-02-2015
Publisher: Proceedings of the National Academy of Sciences
Date: 30-11-2016
Abstract: NOV1 is a stilbene cleavage oxygenase (SCO). SCOs cleave the central double bond of stilbenes, forming two phenolic aldehydes. Many stilbenes, such as resveratrol, are produced by plants as secondary metabolites. They are also formed from lignin during kraft pulping. SCOs are related to carotenoid cleavage oxygenases (CCOs), which cleave β-carotene or apocarotenoids. Carotenoids play important roles in photosynthesis and light perception in the eye. We present the structure of an SCO and the structure of a CCO-related enzyme in ternary complex with oxygen and substrate. This structure allows us to propose a mechanism relevant to both SCOs and CCOs, where the substrate is activated for reaction with a ferric-superoxo electrophile by active site base-catalyzed deprotonation of a phenol group.
Publisher: Elsevier BV
Date: 02-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA00745G
Abstract: A woody biomass was treated in glycerol between 200 and 240 °C in an anhydrous environment to denature the biomass for biopolymer fractionation.
Publisher: Springer Science and Business Media LLC
Date: 20-03-2013
Abstract: The use of Ionic liquids (ILs) as biomass solvents is considered to be an attractive alternative for the pretreatment of lignocellulosic biomass. Acid catalysts have been used previously to hydrolyze polysaccharides into fermentable sugars during IL pretreatment. This could potentially provide a means of liberating fermentable sugars from biomass without the use of costly enzymes. However, the separation of the sugars from the aqueous IL and recovery of IL is challenging and imperative to make this process viable. Aqueous alkaline solutions are used to induce the formation of a biphasic system to recover sugars produced from the acid catalyzed hydrolysis of switchgrass in imidazolium-based ILs. The amount of sugar produced from this process was proportional to the extent of biomass solubilized. Pretreatment at high temperatures (e.g., 160°C, 1.5 h) was more effective in producing glucose. Sugar extraction into the alkali phase was dependent on both the amount of sugar produced by acidolysis and the alkali concentration in the aqueous extractant phase. Maximum yields of 53% glucose and 88% xylose are recovered in the alkali phase, based on the amounts present in the initial biomass. The partition coefficients of glucose and xylose between the IL and alkali phases can be accurately predicted using molecular dynamics simulations. This biphasic system may enable the facile recycling of IL and rapid recovery of the sugars, and provides an alternative route to the production of monomeric sugars from biomass that eliminates the need for enzymatic saccharification and also reduces the amount of water required.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3GC42295J
Abstract: The fate of lignin from wheat straw, Miscanthus, and Loblolly pine after pretreatment by a non-toxic and recyclable ionic liquid (IL), [C 2 mim][OAc], followed by enzymatic hydrolysis was investigated.
Publisher: American Society for Microbiology
Date: 12-2014
DOI: 10.1128/AEM.02795-14
Abstract: Microbial communities that deconstruct plant biomass have broad relevance in biofuel production and global carbon cycling. Biomass pretreatments reduce plant biomass recalcitrance for increased efficiency of enzymatic hydrolysis. We exploited these chemical pretreatments to study how thermophilic bacterial consortia adapt to deconstruct switchgrass (SG) biomass of various compositions. Microbial communities were adapted to untreated, ammonium fiber expansion (AFEX)-pretreated, and ionic-liquid (IL)-pretreated SG under aerobic, thermophilic conditions using green waste compost as the inoculum to study biomass deconstruction by microbial consortia. After microbial cultivation, gravimetric analysis of the residual biomass demonstrated that both AFEX and IL pretreatment enhanced the deconstruction of the SG biomass approximately 2-fold. Two-dimensional nuclear magnetic resonance (2D-NMR) experiments and acetyl bromide-reactive-lignin analysis indicated that polysaccharide hydrolysis was the dominant process occurring during microbial biomass deconstruction, and lignin remaining in the residual biomass was largely unmodified. Small-subunit (SSU) rRNA gene licon libraries revealed that although the dominant taxa across these chemical pretreatments were consistently represented by members of the Firmicutes , the Bacteroidetes , and Deinococcus-Thermus , the abundance of selected operational taxonomic units (OTUs) varied, suggesting adaptations to the different substrates. Combining the observations of differences in the community structure and the chemical and physical structure of the biomass, we hypothesize specific roles for in idual community members in biomass deconstruction.
Publisher: Public Library of Science (PLoS)
Date: 26-12-2012
Publisher: Springer Science and Business Media LLC
Date: 15-07-2015
No related grants have been discovered for Noppadon sathitsuksanoh.