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Structural and functional insights into recombinant β-glucosidase from Thermothelomyces thermophilus: Cello-oligosaccharide hydrolysis and thermostability.
Enzyme Microb Technol
December 2024
Department of Biotechnology, Lorena School of Engineering, University of São Paulo, Lorena, SP, Brazil. Electronic address:
β-glucosidases (BGLs) are key enzymes in the depolymerization of cellulosic biomass, catalyzing the conversion of cello-oligosaccharides into glucose. This conversion is pivotal for enhancing the production of second-generation ethanol or other value-added products in biorefineries. However, the process is often cost-prohibitive due to the high enzyme loadings required.
View Article and Find Full Text PDFInternational Symposium on Ruminant Physiology: Current perspective on rumen microbial ecology to improve fiber digestibility.
J Dairy Sci
December 2024
Centre for Microbiome Research, School of Biomedical Sciences, Queensland University of Technology (QUT), Translational Research Institute, Woolloongabba, QLD, Australia; Faculty of Biosciences, Norwegian University of Life Sciences, Ås, Norway; Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway.
Although cellulose has received the most attention, further research is needed for a complete comprehension of other fiber components in forage and nonforage fiber sources corresponding with the array of enzymes needed for depolymerization and resulting fermentation of sugars. The carbohydrate-active enzymes (CAZymes) have been described in detail herein, although new information will no doubt accumulate in the future. Known CAZymes are attributed to taxa that are easily detected via 16S rRNA gene profiling techniques, but such approaches have limitations.
View Article and Find Full Text PDFNovel Hierarchical Disordered Li- and Al-KIL-2 Catalysts for the Pyrolysis of Biomass Model Compounds and Wool Waste: A Comparison with ZSM-5.
Molecules
December 2024
Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH12 7NT, UK.
In this study, we investigated the pyrolysis of cellulose, lignin, phenylalanine and textile wool waste using microscale thermogravimetric analysis (TGA) and a gram-scale fixed bed reactor. The pyrolysis was conducted at 500 °C and 1 bar N, using Al- and Li-doped mesoporous KIL-2 and ZSM-5 catalysts for comparison. Our results show that amorphous Al-KIL-2 catalyst was the most efficient in producing aromatics from cellulose and lignin.
View Article and Find Full Text PDFAtmospheric one-pot fractionation and catalytic conversion of lignocellulose in multifunctional deep eutectic solvent system.
Int J Biol Macromol
December 2024
Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical & Electrical Engineering, Henan International Joint Laboratory of Biomass Energy and Nanomaterials, Henan Agricultural University, Zhengzhou 450002, China. Electronic address:
This study developed a "one-pot" three-stage process using a "multifunctional" deep eutectic solvent (DES) containing choline chloride (ChCl), ethylene glycol (EG), and protonic acids for the production of phenolic monomers, furfural, and glucose. In the first stage, the DES effectively dissolved over 70 % of lignin and 78 % of hemicellulose while preserving aryl ether bonds in lignin due to the grafting of EG onto the aryl ether bonds. Concurrently, the retention of a near-quantitative amount of cellulose led to a glucose yield of >80 % after enzymatic saccharification.
View Article and Find Full Text PDFMicrobial Upgrading of Lignin Depolymerization: Enhancing Efficiency with Lignin-First Catalysis.
ChemSusChem
December 2024
Department of Energy, Environmental, and Chemical Engineering, McKelvey School of Engineering, Washington University in St. Louis, St Louis, MO 63130, USA.
Chemical depolymerization of lignin is a non-selective process that often generates a wide distribution of product compounds, denoted herein as lignin breakdown products (LBPs). To address this limitation, we developed a hybrid lignin conversion process that employs a lignin-first catalytic approach on biomass and subsequent microbial upgrading. A Pd/C catalyst was used for reductive catalytic fractionation (RCF) of poplar biomass, and Rhodococcus opacus PD630 (R.
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