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https://www.readbyqxmd.com/read/28231540/organic-amine-catalytic-organosolv-pretreatment-of-corn-stover-for-enzymatic-saccharification-and-high-quality-lignin
#1
Chenglun Tang, Junqiang Shan, Yanjun Chen, Lingxia Zhong, Tao Shen, Chenjie Zhu, Hanjie Ying
A novel and efficient organic amine and organosolv synergetic pretreatment method was developed to overcome the recalcitrance of lignocellulose to produce fermentable sugars and high-quality salt-free lignin. After optimization of the process parameters, a delignification of 81.7% and total sugar yield of 83.2% (87.1% glucose, 75.4% xylose) could be obtained using n-propylamine (10mmol/g, biomass) as a catalyst and aqueous ethanol (60%, v/v) as a solvent. The susceptibility of the substrates to enzymatic digestibility was explained by their physical and chemical characteristics...
February 13, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28231537/release-kinetics-of-esterified-p-coumaric-acid-and-ferulic-acid-from-rice-straw-in-mild-alkaline-solution
#2
Tran Ngoc Linh, Hirokata Fujita, Akiyoshi Sakoda
The release kinetics of esterified p-coumaric acid (PCA) and ferulic acid (FA) from rice straw under a mild alkaline condition were investigated to collect fundamental data for the design of a recovery process. The results showed that the straw size, NaOH concentration, and temperature were the key parameters governing release kinetics. The analysis demonstrated that FA is released considerably faster than PCA. The close relationship between lignin and the PCA dissolution indicates a reciprocal and/or simultaneous release...
February 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28231536/lignin-derived-inhibition-of-monocomponent-cellulases-and-a-xylanase-in-the-hydrolysis-of-lignocellulosics
#3
Miriam Kellock, Jenni Rahikainen, Kaisa Marjamaa, Kristiina Kruus
Non-productive enzyme binding onto lignin is the major inhibitory mechanism, which reduces hydrolysis rates and yields and prevents efficient enzyme recycling in the hydrolysis of lignocellulosics. The detailed mechanisms of binding are still poorly understood. Enzyme-lignin interactions were investigated by comparing the structural properties and binding behaviour of fungal monocomponent enzymes, cellobiohydrolases TrCel7A and TrCel6A, endoglucanases TrCel7B and TrCel5A, a xylanase TrXyn11 and a β-glucosidase AnCel3A, onto lignins isolated from steam pretreated spruce and wheat straw...
February 11, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28231535/formic-acid-aided-hot-water-extraction-of-hemicellulose-from-european-silver-birch-betula-pendula-sawdust
#4
Werner Marcelo Goldmann, Juha Ahola, Marja Mikola, Juha Tanskanen
Hemicellulose has been extracted from birch (Betula pendula) sawdust by formic acid aided hot water extraction. The maximum amount of hemicellulose extracted was about 70mol% of the total hemicellulose content at 170°C, measured as the combined yield of xylose and furfural. Lower temperatures (130 and 140°C) favored hemicellulose hydrolysis rather than cellulose hydrolysis, even though the total hemicellulose yield was less than at 170°C. It was found that formic acid greatly increased the hydrolysis of hemicellulose to xylose and furfural at the experimental temperatures...
February 11, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28228328/techno-economic-assessment-of-catalytic-gasification-of-biomass-powders-for-methanol-production
#5
Lara Carvalho, Erik Furusjö, Kawnish Kirtania, Elisabeth Wetterlund, Joakim Lundgren, Marie Anheden, Jens Wolf
This study evaluated the techno-economic performance and potential benefits of methanol production through catalytic gasification of forest residues and lignin. The results showed that while catalytic gasification enables increased cold gas efficiencies and methanol yields compared to non-catalytic gasification, the additional pre-treatment energy and loss of electricity production result in small or no system efficiency improvements. The resulting required methanol selling prices (90-130€/MWh) are comparable with production costs for other biofuels...
February 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28225212/one-pot-process-for-hydrodeoxygenation-of-lignin-to-alkanes-using-ru-based-bimetallic-and-bifunctional-catalysts-supported-on-zeolite-y
#6
Hongliang Wang, Hao Ruan, Maoqi Feng, Yuling Qin, Heather M Job, Langli Luo, Chongmin Wang, Mark H Engelhard, Erik Kuhn, Xiaowen Chen, Melvin P Tucker, Bin Yang
The synthesis of high-efficiency and low-cost catalysts for hydrodeoxygenation (HDO) of waste lignin into advanced biofuels is crucial for enhancing current biorefinery processes. Inexpensive transition metals, including Fe, Ni, Cu, Zn, were severally co-loaded with Ru on HY zeolite to form bimetallic and bifunctional catalysts. These catalysts were subsequently tested for HDO conversion of softwood lignin and several lignin model compounds. Results indicated that the inexpensive earth abundant metals could modulate the hydrogenolysis activity of Ru and decrease the yield of low molecular weight gaseous products...
February 22, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28216587/high-yield-production-of-levulinic-acid-from-pretreated-cow-dung-in-dilute-acid-aqueous-solution
#7
Jialei Su, Feng Shen, Mo Qiu, Xinhua Qi
Agricultural waste cow dung was used as feedstock for the production of a high value-added chemical levulinic acid (LA) in dilute acid aqueous solutions. A high LA yield of 338.9 g/kg was obtained from the pretreated cow dung, which was much higher than that obtained from the crude cow dung (135 g/kg), mainly attributed to the breakage of the lignin fraction in the lignocellulose structure of the cow dung by potassium hydroxide (KOH) pretreatment, and thus enhanced the accessibility of cow dung to the acid sites in the catalytic reaction...
February 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28215326/marine-enzymes-and-microorganisms-for-bioethanol-production
#8
M R Swain, V Natarajan, C Krishnan
Bioethanol is a potential alternative fuel to fossil fuels. Bioethanol as a fuel has several economic and environmental benefits. Though bioethanol is produced using starch and sugarcane juice, these materials are in conflict with food availability. To avoid food-fuel conflict, the second-generation bioethanol production by utilizing nonfood lignocellulosic materials has been extensively investigated. However, due to the complexity of lignocellulose architecture, the process is complicated and not economically competitive...
2017: Advances in Food and Nutrition Research
https://www.readbyqxmd.com/read/28215185/nutritive-value-and-anthelmintic-effect-of-sainfoin-pellets-fed-to-experimentally-infected-growing-rabbits
#9
H Legendre, H Hoste, T Gidenne
Alternative strategies to synthetic chemical drugs are needed in livestock and are a key issue in organic farming today. This study aimed at examining the potentialities of sainfoin, a legume rich in condensed tannins, as a nutraceutical that combines nutritive and antiparasitic effects in rabbits. To test the effect of infection with a helminth (I: infected groups; NI: not infected groups) and the effect of substituting 40% of the alfalfa in a control diet (C) with sainfoin (diet S), four groups of 16 weaned rabbits were arranged according to a 2×2 bifactorial design...
February 20, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28214700/uncertainty-estimation-by-bayesian-approach-in-thermochemical-conversion-of-walnut-hull-and-lignite-coal-blends
#10
Musa Buyukada
The main purpose of the present study was to incorporate the uncertainties in the thermal behavior of walnut hull (WH), lignite coal, and their various blends using Bayesian approach. First of all, thermal behavior of related materials were investigated under different temperatures, blend ratios, and heating rates. Results of ultimate and proximate analyses showed the main steps of oxidation mechanism of (co-)combustion process. Thermal degradation started with the (hemi-)cellulosic compounds and finished with lignin...
February 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28214699/optimization-of-simultaneous-saccharification-and-fermentation-conditions-with-amphipathic-lignin-derivatives-for-concentrated-bioethanol-production
#11
Ningning Cheng, Keiichi Koda, Yutaka Tamai, Yoko Yamamoto, Taichi E Takasuka, Yasumitsu Uraki
Amphipathic lignin derivatives (A-LDs) prepared from the black liquor of soda pulping of Japanese cedar are strong accelerators for bioethanol production under a fed-batch simultaneous enzymatic saccharification and fermentation (SSF) process. To improve the bioethanol production concentration, conditions such as reaction temperature, stirring program, and A-LDs loadings were optimized in both small scale and large scale fed-batch SSF. The fed-batch SSF in the presence of 3.0g/L A-LDs at 38°C gave the maximum ethanol production and a high enzyme recovery rate...
February 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28213706/plant-microbial-association-in-petroleum-and-gas-exploration-sites-in-the-state-of-assam-north-east-india-significance-for-bioremediation
#12
Hemen Sarma, N F Islam, M N V Prasad
The state of Assam in north-east India gained popularity in Asia because of discovery of oil. Pollution due to petroleum and gas exploration is a serious problem in Assam. Oil and gas exploration by various agencies in Assam resulted in soil pollution due to hydrocarbons (HCs) and heavy metals (HMs). Bioremediation gained considerable significance in addressing petroleum hydrocarbon polluted sites in various parts of the world. In this investigation, we have observed 15 species of plants belonging to grass growing on the contaminated soils...
February 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28213322/study-of-processes-influencing-bioavailability-of-pesticides-in-wood-soil-systems-effect-of-different-factors
#13
J M Marín-Benito, E Herrero-Hernández, M S Rodríguez-Cruz, M Arienzo, M J Sánchez-Martín
Lignocellulosic wastes and by-products containing lignin are now available in large amounts from forestry and industrial activities, and could be promising organic materials for the biosorption of pesticides by soils in order to reduce point-source pollution. Adding these materials to soil requires understanding the process of pesticide sorption-desorption by wood-soils, as sorption capacity could increase, with changes in pesticide bioavailability and final fate. The objective of this work was to study the effect that pine and oak wood added to soils had on the sorption/desorption of the pesticides linuron, alachlor, and metalaxyl...
February 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28213299/anaerobic-digestion-of-lignocellulosic-biomasses-pretreated-with-ceriporiopsis-subvermispora
#14
X Liu, S Hiligsmann, R Gourdon, R Bayard
Fungal pretreatment by Ceriporiopsis subvermispora of two forest residues (hazel and acacia branches) and two agricultural lignocellulosic residues (barley straw and sugarcane bagasse) were studied as a pretreatment to improve their subsequent anaerobic digestion for methane production. Biomass samples were grinded to 2 ranges of particle sizes (<4 or 1 mm), autoclaved, inoculated with two strains of C. subvermispora (ATCC 90467 and ATCC 96608) and incubated at 28 °C for 28 days. The effects of fungal pretreatment were assessed by analyzing the samples before and after incubations for dry solids mass, biochemical composition, bio-methane production (BMP) and availability of cellulose to hydrolysis...
February 14, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28210878/the-role-of-weak-interactions-in-lignin-polymerization
#15
Ángel Sánchez-González, Francisco J Martín-Martínez, J A Dobado
Lignin is the most abundant natural polymer composed by aromatic moieties. Its chemical composition and its abundance have focused efforts to unlock its potential as a source of aromatic compounds for many years. The lack of a proper way for lignin de-polymerization has hampered its success as a natural solution for commodity aromatic chemicals, which is also due to the lack of understanding of the underlying mechanisms of lignin polymerization. A fuller fundamental understanding of polymerization mechanisms could lead to improvements in de-polymerization strategies, and therefore a proper methodology and a predictive theoretical framework are required for such purpose...
March 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28207851/impact-of-levels-of-total-digestible-nutrients-on-microbiome-enzyme-profile-and-degradation-of-feeds-in-buffalo-rumen
#16
Anju Kala, D N Kamra, Avinash Kumar, Neeta Agarwal, L C Chaudhary, C G Joshi
The present study was aimed at understanding a shift in rumen microbiome of buffaloes fed various levels of total digestible nutrients. To understand the process, the metagenomics of rumen microbes, in vivo and in vitro rumen fermentation studies were carried out. Three rumen fistulated adult male Murrah buffaloes were fed three isonitrogenous diets varying in total digestible nutrients (70, 85 and 100% of TDN requirement) in 3X3 switch over design. On dry matter basis, wheat straw/ roughage content were 81, 63 and 51% and that of maize grain was 8, 16 and 21% in three diets respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28203276/a-biorefinery-scheme-to-fractionate-bamboo-into-high-grade-dissolving-pulp-and-ethanol
#17
Zhaoyang Yuan, Yangbing Wen, Nuwan Sella Kapu, Rodger Beatson, D Mark Martinez
BACKGROUND: Bamboo is a highly abundant source of biomass which is underutilized despite having a chemical composition and fiber structure similar as wood. The main challenge for the industrial processing of bamboo is the high level of silica, which forms water-insoluble precipitates negetively affecting the process systems. A cost-competitive and eco-friendly scheme for the production of high-purity dissolving grade pulp from bamboo not only requires a process for silica removal, but also needs to fully utilize all of the materials dissolved in the process which includes lignin, and cellulosic and hemicellulosic sugars as well as the silica...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28201992/high-flavonoid-accompanied-with-high-starch-accumulation-triggered-by-nutrient-starvation-in-bioenergy-crop-duckweed-landoltia-punctata
#18
Xiang Tao, Yang Fang, Meng-Jun Huang, Yao Xiao, Yang Liu, Xin-Rong Ma, Hai Zhao
BACKGROUND: As the fastest growing plant, duckweed can thrive on anthropogenic wastewater. The purple-backed duckweed, Landoltia punctata, is rich in starch and flavonoids. However, the molecular biological basis of high flavonoid and low lignin content remains largely unknown, as does the best method to combine nutrients removed from sewage and the utilization value improvement of duckweed biomass. RESULTS: A combined omics study was performed to investigate the biosynthesis of flavonoid and the metabolic flux changes in L...
February 15, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28198593/electrochemical-behavior-of-pedot-lignin-in-ionic-liquid-electrolytes-suitable-cathode-electrolyte-system-for-sodium-batteries
#19
Nerea Casado, Matthias Hilder, Cristina Pozo-Gonzalo, Maria Forsyth, David Mecerreyes
Biomass derived polymers, such as lignin, contain redox quinone/hydroquinone redox moieties that can be used to store charge. Composites based on the biopolymer lignin and several conjugated polymers have shown good charge storage properties. However, their performance has been just studied in acidic aqueous media limiting the applications mainly to supercapacitors. Here we show that PEDOT/Lignin biopolymers are electroactive in aprotic ionic liquids and we move a step further by assembling sodium full cell batteries using PEDOT/Lignin as electrode material and ionic liquid electrolytes...
February 15, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28197154/cowpea-and-groundnut-haulms-fodder-trading-and-its-lessons-for-multidimensional-cowpea-improvement-for-mixed-crop-livestock-systems-in-west-africa
#20
Anandan Samireddypalle, Ousmane Boukar, Elaine Grings, Christian A Fatokun, Prasad Kodukula, Ravi Devulapalli, Iheanacho Okike, Michael Blümmel
Cowpea is an important legume crop in Africa, valued highly for its grain and also haulms, which are a tradable commodity in fodder markets. Fodder market surveys in Northern Nigeria showed that groundnut haulms were priced higher than cowpea haulms, probably because of their superior nutritive value. The economic value of haulms has prompted cowpea breeders and livestock nutritionists to explore haulm fodder traits as additional selection and breeding criteria. Fifty cowpea genotypes cultivated across five locations in Nigeria in 2013 and 2014 were evaluated for food fodder traits...
2017: Frontiers in Plant Science
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