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https://www.readbyqxmd.com/read/29791080/one-step-lignocellulose-fractionation-using-2-5-furandicarboxylic-acid-as-biogenic-and-recyclable-catalyst
#1
Dennis Weidener, Holger Klose, Walter Leitner, Ulrich Schurr, Björn Usadel, Pablo Domínguez de María, Philipp Michael Grande
To develop novel biorefinery concepts, the use of bio-based catalysts and solvents must be aligned with the Green Chemistry principles. In this context biogenic 2,5-furandicarboxylic acid (FDCA) is a very promising, yet underused molecule with high potential application as acid catalyst combining feasibility and sustainability with an efficient and straightforward recovery. In this work, FDCA was evaluated as catalyst in the recently developed OrganoCat pretreatment, a biphasic lignocellulose fractionation system...
May 23, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29786938/inhibition-and-kinetic-studies-of-lignin-degrading-enzymes-of-ganoderma-boninense-by-naturally-occurring-phenolic-compounds
#2
Arthy Surendran, Yasmeen Siddiqui, Halimi Mohd Saud, Nusaibah Syd Ali, Sivakumar Manickam
AIM: Lignolytic (Lignin degrading) enzyme, from oil palm pathogen Ganoderma boninense Pat. (Syn G. orbiforme (Ryvarden), is involved in the detoxification and the degradation of lignin in the oil palm and is the rate-limiting step in the infection process of this fungus. Active inhibition of lignin degrading enzymes secreted by G. boninense by various naturally occurring phenolic compounds and estimation of efficiency on pathogen suppression was aimed at. METHODS AND RESULTS: In our work, ten naturally occurring phenolic compounds were evaluated for their inhibitory potential towards the lignolytic enzymes of G...
May 22, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29785688/the-influence-of-nonionic-surfactant-adsorption-on-enzymatic-hydrolysis-of-oil-palm-fruit-bunch
#3
Jatuporn Parnthong, Suratsawadee Kungsanant, Sumaeth Chavadej
Nonionic surfactants have been utilized to improve the enzymatic hydrolysis of lignocellulosic materials. However, the role of surfactant adsorption affecting enzymatic hydrolysis has not been elaborated well. In this work, nonionic surfactants differing in their molecular structures, namely the polyoxyethylene sorbitan monooleate (Tween 80), the secondary alcohol ethoxylate (Tergitol 15-S-9), and the branched alcohol ethoxylate (Tergitol TMN-6), were studied for their effects on the enzymatic hydrolysis of palm fruit bunch (PFB)...
May 22, 2018: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29784334/toasted-vine-shoot-chips-as-enological-additive
#4
Cristina Cebrián-Tarancón, Rosario Sánchez-Gómez, M Rosario Salinas, Gonzalo L Alonso, José Oliva, Amaya Zalacain
Different ways of vine-shoots revalorization have been proposed, but not in wine yet, as for example in the same way as oak chips are being used. In this work, vine-shoot samples were submitted to a thermogravimetric analysis to establish the temperature range for its lignin structure decomposition, resulting between 160 and 180 °C. Then, vine-shoot chips from Airén and Cencibel cultivars, with a particle size around 2.5-3.5 cm, were submitted to six toasting conditions: 160 °C and 180 °C for 45, 60 and 75 min...
October 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29783129/effect-of-surfactant-assisted-sonic-pretreatment-on-liquefaction-of-fruits-and-vegetable-residue-characterization-acidogenesis-biomethane-yield-and-energy-ratio
#5
M Shanthi, J Rajesh Banu, P Sivashanmugam
The present study explored the disintegration potential of fruits and vegetable residue through sodium dodecyl sulphate (SDS) assisted sonic pretreatment (SSP). In SSP method, initially the biomass barrier (lignin) was removed using SDS at different dosage, subsequently it was sonically disintegrated. The effect of SSP were assessed based on dissolved organic release (DOR) of fruits and vegetable waste and specific energy input. SSP method achieved higher DOR rate and suspended solids reduction (26% and 16%) at optimum SDS dosage of 0...
May 15, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29781573/overexpression-of-ostf1l-a-rice-hd-zip-transcription-factor-promotes-lignin-biosynthesis-and-stomatal-closure-that-improves-drought-tolerance
#6
Seung Woon Bang, Dong-Keun Lee, Harin Jung, Pil Joong Chung, Youn Shic Kim, Yang Do Choi, Joo-Won Suh, Ju-Kon Kim
Drought stress seriously impacts on plant development and productivity. Improvement of drought tolerance without yield penalty is a great challenge in crop biotechnology. Here, we report that the rice (Oryza sativa) homeodomain-leucine zipper transcription factor gene, OsTF1L (Oryza sativa transcription factor 1-like), is a key regulator of drought tolerance mechanisms. Overexpression of the OsTF1L in rice significantly increased drought tolerance at the vegetative stages of growth and promoted both effective photosynthesis and a reduction in the water loss rate under drought conditions...
May 21, 2018: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/29781000/nanoimprint-lithography-of-nanoporous-carbon-materials-for-micro-supercapacitor-architectures
#7
Stefanie Lochmann, Julia Grothe, Kai Eckhardt, Desirée Leistenschneider, Lars Borchardt, Stefan Kaskel
Nanoimprint lithography is proposed as a highly versatile method for the production of nanostructured supercapacitors (micro-supercapacitors, MSC). Liquid sucrose- and lignin-precursor printing produces patterns with high quality and a line width down to 500 nm. The liquid-carbon-precursor NIL-printing approach enables nitrogen doping to achieve an increased supercapacitor performance for aqueous electrolytes (Li2SO4). The lines are interconverted into nanoporous carbon materials (d ≈ 1 nm) with high specific surface area (>1000 m2 g-1) to form stable structures reaching specific resistivities as low as ρ = 3...
May 21, 2018: Nanoscale
https://www.readbyqxmd.com/read/29780372/highly-promiscuous-oxidases-discovered-in-the-bovine-rumen-microbiome
#8
Lisa Ufarté, Gabrielle Potocki-Veronese, Davide Cecchini, Alexandra S Tauzin, Angeline Rizzo, Diego P Morgavi, Bernard Cathala, Céline Moreau, Megane Cleret, Patrick Robe, Christophe Klopp, Elisabeth Laville
The bovine rumen hosts a diverse microbiota, which is highly specialized in the degradation of lignocellulose. Ruminal bacteria, in particular, are well equipped to deconstruct plant cell wall polysaccharides. Nevertheless, their potential role in the breakdown of the lignin network has never been investigated. In this study, we used functional metagenomics to identify bacterial redox enzymes acting on polyaromatic compounds. A new methodology was developed to explore the potential of uncultured microbes to degrade lignin derivatives, namely kraft lignin and lignosulfonate...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29778878/structural-elucidation-of-lignin-carbohydrate-complexes-lccs-from-chinese-quince-chaenomeles-sinensis-fruit
#9
Zhao Qin, Yu-Xiang Ma, Hua-Min Liu, Guang-Yong Qin, Xue-De Wang
The lignin-carbohydrate complexes (LCC) of the mesocarp (MS) and near the endocarp (NE) of Chinese quince (Chaenomeles sinensis) fruits were analyzed using three different methods of fractioning: milled wood lignin (MWL), LCC extracted from crude MWL with acetic acid (LCC-AcOH), and Bjorkman LCC. The MWL and LCC fractions were characterized by carbohydrate composition analysis, SEC, FT-IR, Py-GC/MS, thermal analysis and 2D HSQC NMR. Notably, large amounts of arabinose and galactose remained in the Björkman LCC fractions suggesting a chemical bond between the lignin and pectin...
May 17, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29778802/controlling-the-selectivity-to-chemicals-from-catalytic-depolymerization-of-kraft-lignin-with-in-situ-h-2
#10
Ligang Luo, Jing Yang, Guodong Yao, Fangming Jin
Catalytic depolymerization of kraft lignin was successfully carried out in isopropanol/water mixture system over Rh/La2 O3 /CeO2 -ZrO2 catalyst at 373 °C for 2 h with Fe as reductant. The selectivity of in-situ H2 was increasing from 67 wt% to 98 wt% by changing the proportion of isopropanol and water with metal Fe. A one-to-one correspondence was established between liquid products distribution and H2 . It was an efficient method for predicting the composition of the liquid oil by H2 selectivity detection or converting kraft lignin to desirable liquid products optionally, which administered to reduce the dependence on the specific catalysts...
March 15, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29778084/carbon-composite-lignin-based-adsorbents-for-the-adsorption-of-dyes
#11
Xiaohong Wang, Chenglong Jiang, Bingxia Hou, Yingying Wang, Chen Hao, Jingbo Wu
Carbon composite lignin-based adsorbent were prepared through hydrothermal method with glucose as carbon source, calcium lignosulfonate and triethylene tetramine as raw materials, respectively. The optimum synthesis conditions were determined by investigating the addition of carbon and triethylene tetramine. The adsorbent was used for the adsorption of azo dyes Congo red and Eriochrome blue black R, and the five factors affecting the adsorption were discussed, including pH of dyes, initial concentration, adsorption time, adsorption temperature and adsorbent dosage...
May 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29776722/flammulina-velutipes-treatment-of-non-sterile-tall-wheat-grass-for-enhancing-biodegradability-and-methane-production
#12
Agnieszka Kasprzycka, Justyna Lalak-Kańczugowska, Jerzy Tys
In this study fungal pretreatment of non-sterile tall wheat grass via the white rot fungi Flammulina velutipes was studied and the effect on biodegradability of lignocellulosic biomass and methane production, was evaluated. Degradation of lignin, cellulose, hemicellulose, and dry matter in non-sterile tall wheat grass during 28 days of fungal pretreatment using different inoculum ratio (0%-50%) and moisture content (MC) (45% MC, 65% MC, and 75% MC) were assessed via comparison to untreated biomass. Pretreatment with F...
May 9, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29775709/use-of-green-chemistry-methods-in-the-extraction-of-dietary-fibers-from-cactus-rackets-opuntia-ficus-indica-structural-and-microstructural-studies
#13
Marwa Cheikh Rouhou, Souhir Abdelmoumen, Sabu Thomas, Hamadi Attia, Dorra Ghorbel
This work aims to compare the development of three green chemistry methods in the extraction of cactus (Opuntia ficus indica) dietary fibers. The influence of extraction conditions (solvent nature: water, lemon juice and ethanol; extraction process: maceration and steam explosion; extraction time: 30 min, 1 h, 3 h, 5 h) on the chemical and structural composition was studied. Fourier Transform Infrared (FTIR) spectroscopy proved that all treatments do not affect the cellulose structure and could induce the reduction of hemicelluloses and lignin content...
May 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29775208/biodegradation-of-asphaltene-and-petroleum-compounds-by-a-highly-potent-daedaleopsis-sp
#14
Elaheh Pourfakhraei, Jalil Badraghi, Fatemeh Mamashli, Mahboobeh Nazari, Ali Akbar Saboury
Petroleum, as the major energy source, is indispensable from our lives. Presence of compounds resistant to degradation can pose risks for human health and environment. Basidiomycetes have been considered as powerful candidates in biodegradation of petroleum compounds via secreting ligninolytic enzymes. In this study a wood-decaying fungus was isolated by significant degradation ability that was identified as Daedaleopsis sp. by morphological and molecular identification methods. According to GC/MS studies, incubation of heavy crude oil with Daedaleopsis sp...
May 18, 2018: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29774050/one-step-process-of-hydrothermal-and-alkaline-treatment-of-wheat-straw-for-improving-the-enzymatic-saccharification
#15
Shaolong Sun, Lidan Zhang, Fang Liu, Xiaolin Fan, Run-Cang Sun
Background: To increase the production of bioethanol, a two-step process based on hydrothermal and dilute alkaline treatment was applied to reduce the natural resistance of biomass. However, the process required a large amount of water and a long operation time due to the solid/liquid separation before the alkaline treatment, which led to decrease the pure economic profit for production of bioethanol. Therefore, four one-step processes based on order of hydrothermal and alkaline treatment have been developed to enhance concentration of glucose of wheat straw by enzymatic saccharification...
2018: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29773709/growth-of-sedimentary-bathyarchaeota-on-lignin-as-an-energy-source
#16
Tiantian Yu, Weichao Wu, Wenyue Liang, Mark Alexander Lever, Kai-Uwe Hinrichs, Fengping Wang
Members of the archaeal phylum Bathyarchaeota are among the most abundant microorganisms on Earth. Although versatile metabolic capabilities such as acetogenesis, methanogenesis, and fermentation have been suggested for bathyarchaeotal members, no direct confirmation of these metabolic functions has been achieved through growth of Bathyarchaeota in the laboratory. Here we demonstrate, on the basis of gene-copy numbers and probing of archaeal lipids, the growth of Bathyarchaeota subgroup Bathy-8 in enrichments of estuarine sediments with the biopolymer lignin...
May 17, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29773395/x-ray-powder-diffraction-and-other-analyses-of-cellulose-nanocrystals-obtained-from-corn-straw-by-chemical-treatments
#17
C C Hernandez, F F Ferreira, D S Rosa
The extraction of nanocellulose from agro-industrial wastes is feasible due to a significant amount of cellulose contained in these natural fibers. The analysis of chemical treatments effects on the fibers to obtain the nanocellulose must be taken into consideration for the definition of an adequate and efficient methodology. In this study, two alkaline treatments were used (cleaning and bleaching), as well as an acid treatment for the extraction of nanocellulose from corn straw residues. The samples were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), dynamic light scattering (DLS) and atomic force microscopy (AFM) to verify the action and modifications caused in their chemical and physical structures...
August 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29772906/visualization-and-semi-quantity-study-of-the-distribution-of-ma-jor-components-in-wheat-straw-in-mesoscopic-scale-using-ftir-microspectroscopic-imaging
#18
Zengling Yang, Jiaqi Mei, Zhiqiang Liu, Guangqun Huang, Guan Huang, Lujia Han
Understanding the biochemical heterogeneity of plant tissue linked to crop straw anatomy is attractive to plant researchers and researchers in the field of biomass-refinery. This study provides an in-situ analysis and semi-quantitative, visualization distributions of major composition distribution in internodal transverse sections of wheat straw based on FTIR microspec-troscopic imaging, with a fast Non-Negativity-Constrained Least Squares (fast NNLS) fitting. The paper investigates changes in biochemical components of tissue during stages of elongation, booting, heading, flowering, grain-filling, milk-ripening, dough, and full-ripening...
May 18, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29772644/enhanced-enzymatic-hydrolysis-of-rice-straw-pretreated-by-oxidants-assisted-with-photocatalysis-technology
#19
Ken-Lin Chang, Xiao-Qin Wang, Ye-Ju Han, Hao Deng, Jing-Yong Liu, Yuan-Chung Lin
This work evaluated the effectiveness of rice straw pretreatment using a TiO₂/UV system in the presence of oxidants. The effects of TiO₂ concentrations, pH and photocatalysis time were investigated. Inorganic oxidants including H₂O2, K₂S₂O₈, and KIO₄ were added to further enhance the effect on enzymatic hydrolysis of rice straw. The TiO₂/UV/ H₂O₂ pretreatment showed a higher amount of released reducing sugar (8.88 ± 0.10 mg/mL, compared to 5.47 ± 0.03 mg/mL in untreated sample). Composition analyses of rice straw after the TiO₂/UV/H₂O₂ pretreatment showed partial lignin and hemicellulose removal...
May 16, 2018: Materials
https://www.readbyqxmd.com/read/29772563/assessment-of-different-pretreatment-technologies-for-efficient-bioconversion-of-lignocellulose-to-ethanol
#20
Jitendra K Singh, Preeti Vyas, Anamika Dubey, Chandrama Prakash Upadhyaya, Richa Kothari, Vineet Veer Tyagi, Ashwani Kumar
The future supply of energy to meet growing energy demand of rapidly exapanding populations is based on wide energy resources, particularly the renewable ones. Among all resources, lignocellulosic biomasses such as agriculture, forest, and agro-industrial residues are the most abundant and easily available bioresource for biorefineries to provide fuels, chemicals, and materials. However, pretreatment of biomass is required to overcome the physical and chemical barriers that exist in the lignin-carbohydrate composite and pretreatment facilitate the entry of biocatalysts for the conversion of biomass into fermentable sugars and other by-products...
June 1, 2018: Frontiers in Bioscience (Scholar Edition)
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