Comparison of different pretreatment methods for lignocellulosic materials. Part II: Influence of pretreatment on the properties of rye straw lignin

Wörmeyer, Kai; Ingram, Thomas; Saake, Bodo; Brunner, Gerd; Смирнова, Ирина

doi:10.1016/j.biortech.2010.11.063

Cited by 144 publications

(77 citation statements)

References 28 publications

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“…In China, agricultural residues can be used as the feedstock to produce ethanol fuel because of its abundance, high carbohydrate content, and low cost (Yao et al 2010). Agricultural residue is mainly comprised of cellulose, hemicellulose, and lignin, which is considered for second generation biofuel production (Wörmeyer et al 2011). Wheat straw is the most attractive low cost feedstock for production of bioethanol because of its abundance (nearly 600 million tons/year), renewability, and low lignin content (ca.…”

Section: Introductionmentioning

confidence: 99%

Determination of Lignin-Carbohydrate Complexes Structure of Wheat Straw using Carbon-13 Isotope as a Tracer

et al. 2016

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Section: Introductionmentioning

confidence: 99%

Determination of Lignin-Carbohydrate Complexes Structure of Wheat Straw using Carbon-13 Isotope as a Tracer

et al. 2016

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“…Consequently, the lignin products from LHW pre-treatment show only small structural differences compared to lignin products occurring in nature [32], and the purity of the LHW lignin is around 50 -85 % based on Klason lignin content. The rest consists mainly of carbohydrates and inorganics in AL lignin while for AS lignin the main contaminants are non-hydrolyzed carbohydrates, sugar monomers and enzymes [33].…”

Section: Isolation Of Lignin By Liquid Hot Water Treatmentmentioning

confidence: 99%

High Pressure Processes in Biorefineries

Zetzl

Gairola

Kirsch

et al. 2011

Chemie Ingenieur Technik

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An overview of high pressure processes for producing chemicals from lignocellulosic biomass is presented. Special attention is given to the combination of different process steps and scale-up possibilities for the apparatus involved. Based on literature and own experiments it is shown that, under the condition of an adapted choice of process parameters, high pressure biorefinery allows the connection and combination of different high efficient and selective unit operations to a single one-stop process that can be realized in different scales. Such reactor design can be used for numerous lab scale experiments providing a basis for comparable data for different types of solid biomass. The advantage of such a screening unit is the possibility of cascading processes in the same extraction vessel. Thus, the knowledge on a convergent behavior of reaction and extraction rates can be gained, allowing to progress in modeling of solid biomass conversion under high pressure.

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“…[5] Soda lignin is sulfur-free; therefore, its chemical composition is closer to natural lignin compared with kraft lignin. [67] While the organic pulping process such as organosolv pulping is also one of the most promising alternatives to existing pulping technologies. Lignin is separated via solubilization from organosolv pulping process.…”

Section: Introductionmentioning

confidence: 99%

The inhibition of hepatic and renal glucuronidation of p-Nitrophenol and 4-Methylumbelliferone by oil palm empty fruit bunch lignin and its main oxidation compounds

2017

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Background:In order to develop oil palm empty fruit bunch (EFB) lignin as a nutraceutical and health supplement, the investigation of its potential in interacting with other drugs via inhibition of drug-metabolizing enzymes (DMEs) would ensure product safety.Objective:The study was aimed to investigate the in vitro effect of oil palm EFB lignin and its main oxidation compounds on phase II DME UDP-glucuronosyltransferases (UGTs) in rat liver and kidney microsomes.Materials and Methods:The p-nitrophenol (p-NP) and 4-methylumbelliferone (4-MU) were employed as probe substrates in glucuronidation assays. The effect of soda oil palm EFB lignin on Vmax, Km, CLint, Ki, and mode of inhibition of 4-MU glucuronidation in RLM was also determined.Results:The inhibitory potency of oil palm EFB lignin for both p-NP and 4-MU glucuronidation in rat liver microsome (RLM) and rat kidneys microsomes (RKM) was found to be in the rank order of soda > kraft > organosolv. However, the inhibitory potency of its main oxidation compounds were in the rank order of vanillin > syringaldehyde > p-hydroxybenzaldehyde. Soda oil palm EFB lignin exhibited mixed-type inhibition against 4-MU glucuronidation in RLM, showing the change in apparent Vmax and with only a minor effect on Km compared with control.Conclusions:The findings showed that effect of oil palm EFB lignin on both p-NP and 4-MU glucuronidation in RLM and RKM was enhanced by the presence of vanillin as well as flavonoids. Kinetic study showed that soda oil palm EFB lignin exhibited strong inhibition on UGT activity in RLM with mixed-type inhibition mode.SUMMARY The inhibitory potential of oil palm EFB lignin extracts for p-NP and 4-MU glucuronidation in RLM and RKM can be listed in the following rank order: soda > kraft > organosolvThe inhibitory potential of oil palm EFB lignin main oxidation compounds for p-NP and 4-MU glucuronidation in RLM and RKM can be listed in the following rank order: vanillin > syringaldehyde > p-hydroxybenzaldehydeResults suggested that the effect of oil palm EFB lignin on p-NP and 4-MU glucuronidation activity in both RLM and RKM was enhanced by the presence of vanillin as well as total flavonoid contentResults also suggested that oil palm EFB lignin may inhibit glucuronidation of substrate by UGT enzymes, especially UGT1A6, particularly in rat liver Abbreviations used: p-NP: p-Nitrophenol, 4-MU: 4-Methylumbelliferone, EFB: Empty fruit bunch, DME: Drug-metabolizing enzymes, UGT: UDPglucuronosyltransferase, Vmax: Maximal reaction velocity, Km: Michaelis-Menten constant, CLint: Intrinsic clearance, Ki: Dissociation constant of an inhibitor enzyme complex, 4-MUG: 4-Methylumbelliferone glucuronide, DMSO: Dimethyl sulfoxide, IC50: Half maximal inhibitory concentration, p-NPG: p-Nitrophenol glucuronide, RKM: Rat kidneys microsomes, RLM: Rat liver microsome, UDPGA: UDPglucuronic acid, TCA: trichloroacetic acid, MPA: mycophenolic acid

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Comparison of different pretreatment methods for lignocellulosic materials. Part II: Influence of pretreatment on the properties of rye straw lignin

Cited by 144 publications

References 28 publications

Determination of Lignin-Carbohydrate Complexes Structure of Wheat Straw using Carbon-13 Isotope as a Tracer

Determination of Lignin-Carbohydrate Complexes Structure of Wheat Straw using Carbon-13 Isotope as a Tracer

High Pressure Processes in Biorefineries

The inhibition of hepatic and renal glucuronidation of p-Nitrophenol and 4-Methylumbelliferone by oil palm empty fruit bunch lignin and its main oxidation compounds

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