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Journal articles on the topic 'Lignine sulfatée'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Penín, Lucía, Heiko Lange, Valentín Santos, Claudia Crestini, and Juan Carlos Parajó. "Characterization of Eucalyptus nitens Lignins Obtained by Biorefinery Methods Based on Ionic Liquids." Molecules 25, no. 2 (2020): 425. http://dx.doi.org/10.3390/molecules25020425.

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Eucalyptus nitens wood samples were subjected to consecutive stages of hydrothermal processing for hemicellulose solubilization and delignification with an ionic liquid, i.e., either 1-butyl-3-methylimidazolium hydrogen sulfate or triethylammonium hydrogen sulfate. Delignification experiments were carried out a 170 °C for 10–50 min. The solid phases from treatments, i.e., cellulose-enriched solids, were recovered by centrifugation, and lignin was separated from the ionic liquid by water precipitation. The best delignification conditions were identified on the basis of the results determined fo

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2

Levdansky, Alexander V., Natalya Yu Vasilyeva, Yuriy N. Malyar, et al. "An Efficient Method of Birch Ethanol Lignin Sulfation with a Sulfaic Acid-Urea Mixture." Molecules 27, no. 19 (2022): 6356. http://dx.doi.org/10.3390/molecules27196356.

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For the first time, the process of birch ethanol lignin sulfation with a sulfamic acid-urea mixture in a 1,4-dioxane medium was optimized experimentally and numerically. The high yield of the sulfated ethanol lignin (more than 96%) and containing 7.1 and 7.9 wt % of sulfur was produced at process temperatures of 80 and 90 °C for 3 h. The sample with the highest sulfur content (8.1 wt %) was obtained at a temperature of 100 °C for 2 h. The structure and molecular weight distribution of the sulfated birch ethanol lignin was established by FTIR, 2D 1H and 13C NMR spectroscopy, and gel permeation

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3

Malyar, Yuriy Nikolayevich, Natal'ya Yur'yevna Vasil'yeva, Aleksandr Sergeyevich Kazachenko, Galina Pavlovna Skvortsova, Irina Vladimirovna Korol'kova, and Svetlana Alekseyevna Kuznetsova. "SULFATION OF ABIES ETHANOL LIGNIN WITH COMPLEXES OF SULFUR TRIOXIDE WITH 1,4-DIOXANE AND PYRIDINE." chemistry of plant raw material, no. 3 (October 22, 2020): 5–15. http://dx.doi.org/10.14258/jcprm.2020036931.

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In this work, we optimized the process of sulfating abies ethanol lignin with complexes of sulfuric anhydride with pyridine and 1,4-dioxane. Experimentally found are the conditions for the implementation of the process of sulfation of abies ethanol lignin by complexes of sulfur trioxide with 1,4-dioxane and pyridine, providing a high sulfur content (12.0–12.6%). It was shown that a high sulfur content of 12.0–13.5% (mass.) in the obtained ethanol lignin sulfate is achieved when the ratio of the amount of chlorosulfonic acid to the amount of abies ethanol lignin is 20.22 : 1 mmol : g and the du

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4

Arrieta, Alberto Albis, Ever Ortiz Muñoz, Ismael Piñeres Ariza, Juan Osorio Cardozo, and Jennifer Monsalvo Morales. "Catalytic effect of ferric sulfate and zinc sulfate on lignin pyrolysis." Applied Chemical Engineering 5, no. 1 (2022): 59. http://dx.doi.org/10.24294/ace.v5i1.1449.

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The effect of zinc sulfate and ferric sulfate on the pyrolysis process of lignin was studied at three different heating rates by using the thermogravimetric analysis technique. It was found that the pyrolysis of pure lignin is barely affected with the change of heating rates between 10 to 100 °C/min, which is unexpected because of the kinetic nature of pyrolysis. The pyrolysis kinetics of this major component of biomass was studied by using three fitting methods: the differential method with reaction order model n, the isoconversional method, and the distribution of activation energies model,

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5

Belesov, Artyom V., Anton V. Ladesov, Ilya I. Pikovskoi, Anna V. Faleva, and Dmitry S. Kosyakov. "Characterization of Ionic Liquid Lignins Isolated from Spruce Wood with 1-Butyl-3-methylimidazolium Acetate and Methyl Sulfate and Their Binary Mixtures with DMSO." Molecules 25, no. 11 (2020): 2479. http://dx.doi.org/10.3390/molecules25112479.

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Ionic liquids (ILs) based on 1-butyl-3-methylimidazolium (bmim) cation have proved to be promising solvents for the fractionation of plant biomass with the production of cellulose and lignin. This study deals with the characterization of lignins isolated from coniferous (spruce) wood using [bmim]OAc and [bmim]MeSO4 ionic liquids and their binary mixtures with DMSO (80:20). Molecular weight distributions, functional composition, and structural features of IL lignins were studied by size-exclusion chromatography, NMR spectroscopy (1D and 2D) and atmospheric pressure photoionization high-resoluti

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6

Albis Arrieta, Alberto Ricardo, Ever Ortiz Muñoz, Ismael Enrique Piñeres Ariza, Juan Sebastián Osorio Cardozo, and Jennifer Monsalvo Morales. "Efecto catalítico del sulfato de zinc y el sulfato férrico en la pirólisis de la lignina/Catalytic effect of zinc sulfate and ferric sulfate on lignin pyrolysis." Prospectiva 16, no. 1 (2017): 41–50. http://dx.doi.org/10.15665/rp.v16i1.1397.

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Recurriendo al uso de la técnica análisis termogravimétrico, se estudió el efecto del sulfato de zinc y del sulfato férrico en el proceso de pirólisis de la lignina a tres velocidades de calentamiento. Se encontró que la pirólisis de la lignina pura se afecta muy poco con el cambio de las velocidad de calentamiento entre 10 y 100 °C/min, lo cual es inesperado por la naturaleza cinética de la pirólisis. La cinética de pirólisis de este componente de la biomasa fue estudiada teniendo en cuenta tres métodos de ajuste: el método diferencial con modelo de orden de reacción n, el método isoconversio

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7

Martínez-Cortés, Teresa, Federico Pomar, and Esther Novo-Uzal. "Evolutionary Implications of a Peroxidase with High Affinity for Cinnamyl Alcohols from Physcomitrium patens, a Non-Vascular Plant." Plants 10, no. 7 (2021): 1476. http://dx.doi.org/10.3390/plants10071476.

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Physcomitrium (Physcomitrella) patens is a bryophyte highly tolerant to different stresses, allowing survival when water supply is a limiting factor. This moss lacks a true vascular system, but it has evolved a primitive water-conducting system that contains lignin-like polyphenols. By means of a three-step protocol, including ammonium sulfate precipitation, adsorption chromatography on phenyl Sepharose and cationic exchange chromatography on SP Sepharose, we were able to purify and further characterize a novel class III peroxidase, PpaPrx19, upregulated upon salt and H2O2 treatments. This per

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8

Kazachenko, Aleksandr S., Feride Akman, Natalya Yu Vasilieva, et al. "Sulfation of Wheat Straw Soda Lignin with Sulfamic Acid over Solid Catalysts." Polymers 14, no. 15 (2022): 3000. http://dx.doi.org/10.3390/polym14153000.

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Soda lignin is a by-product of the soda process for producing cellulose from grassy raw materials. Since a method for the industrial processing of lignin of this type is still lacking, several research teams have been working on solving this problem. We first propose a modification of soda lignin with sulfamic acid over solid catalysts. As solid catalysts for lignin sulfation, modified carbon catalysts (with acid sites) and titanium and aluminum oxides have been used. In the elemental analysis, it is shown that the maximum sulfur content (16.5 wt%) was obtained with the Sibunit-4® catalyst oxi

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9

Ferreira, Bruno G., Renan Falcioni, Lubia M. Guedes, et al. "Preventing False Negatives for Histochemical Detection of Phenolics and Lignins in PEG-Embedded Plant Tissues." Journal of Histochemistry & Cytochemistry 65, no. 2 (2016): 105–16. http://dx.doi.org/10.1369/0022155416677035.

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Polyethylene glycol (PEG) is a low-cost and advantageous embedding medium, which maintains the majority of cell contents unaltered during the embedding process. Some hard or complex plant materials are better embedded in PEG than in other usual embedding media. However, the histochemical tests for phenolics and lignins in PEG-embedded plant tissues commonly result in false negatives. We hypothesize that these false negatives should be prevented by the use of distinct fixatives, which should avoid the bonds between PEG and phenols. Novel protocols for phenolics and flavanols detection are effic

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10

Rotondo, Felipe, Rodrigo Coniglio, Leandro Cantera, Ignacio Di Pascua, Leonardo Clavijo, and Andrés Dieste. "Lignin-based coatings for controlled P-release fertilizer consisting of granulated simple superphosphate." Holzforschung 72, no. 8 (2018): 637–43. http://dx.doi.org/10.1515/hf-2017-0176.

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AbstractA novel lignin-based slow release fertilizer with low environmental impact has been developed. More precisely, a granulated simple superphosphate fertilizer, consisting of calcium phosphate monobasic [Ca(H2PO4)2·H2O] and gypsum (CaSO4·2H2O) was coated with modified kraft lignins and the diffusion of phosphorus was observed as a function of time. The lignin was hydroxymethylated with formaldehyde and subsequently cross-linked with phenol-formaldehyde resin resulting in HML-PF as coating. Moreover, coating films were prepared from a mixture of acetylated lignin (Lac) and acetylated cellu

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11

Emrick, Rachel, D. L. Creech, and G. Bickerstaff. "INFLUENCE OF LIGNITE-ACTIVATED WATER ON SEED GERMINATION, CUTTING PROPAGATION, AND PLANT PERFORMANCE." HortScience 31, no. 5 (1996): 744a—744. http://dx.doi.org/10.21273/hortsci.31.5.744a.

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This project tested rates of lignite-activated water (LAW) for its influence on seed germination, cutting propagation, and plant performance. LAW is a product of CAW Industries, Rapid City, S.D. LAW is water-activated by lignite in a process that includes the addition of sulfated castor oil, calcium chloride, magnesium sulfate, sodium meta silicate, and fossilized organics from refined lignite. LAW is reported to improve many plant performance traits. Four rates were used in this study. Seed germination trials indicated no significant differences in germination percentage with LAW applications

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12

Morandim-Giannetti, Andreia de Ara�jo, Lidiane Gaspareto Felippe, V�nia Aparecida de Freitas Formenton Macedo Dos Santos, Massuo Jorge Kato, and Maysa Furlan. "Phenylalanine ammonia lyase: new insights from Piperaceae species." Ecl�tica Qu�mica Journal 47, no. 2SI (2022): 67–82. http://dx.doi.org/10.26850/1678-4618eqj.v47.2si.2022.p67-82.

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The enzyme PAL (phenylalanine ammonia lyase) mediates the key entry point to the general phenylpropanoid pathway, which is involved in the lignification process and in the formation of a myriad of secondary compounds in plants that show a variety of biological activities. Soluble fractions containing PAL extracted from Piper and Peperomia species had the optimal catalytic activity analyzed by statistical design model. This analysis revealed that the best conversion of L-phenylalanine to trans-cinnamic acid was pH 9.3 and 58 °C after 25 h, corroborating interesting thermal stability. Additional

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13

Bouissil, Soukaina, Zainab El Alaoui-Talibi, Guillaume Pierre, et al. "Fucoidans of Moroccan Brown Seaweed as Elicitors of Natural Defenses in Date Palm Roots." Marine Drugs 18, no. 12 (2020): 596. http://dx.doi.org/10.3390/md18120596.

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Fucoidans from Moroccan brown seaweed Bifurcaria bifurcata and Fucus spiralis were tested for their elicitor activity after their purification and complete characterization. The fucoidans of B. bifurcata (BBF) and of F. spiralis (FSF) were extracted and purified then characterized by infrared spectroscopy, proton nuclear magnetic resonance spectroscopy and size exclusion chromatography. The results show that BBF and FSF are mainly sulfated with 45.49 and 49.53% (w/w) sulfate, respectively. Analysis of neutral sugars determined by gas chromatography–mass spectrometry showed that FSF and BBF wer

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14

Pareek, S., J. I. Azuma, S. Matsui, and Y. Shimizu. "Degradation of lignin and lignin model compound under sulfate reducing condition." Water Science and Technology 44, no. 2-3 (2001): 351–58. http://dx.doi.org/10.2166/wst.2001.0789.

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The release of depolymerization products of lignin during the degradation of lignocellulsic material under sulfate reducing condition was investigated. In addition, we investigated the fate of the most common (β-O-4) link present in lignin under sulfate reducing condition, using a lignin model compound. The method of investigation was based on the selective inhibition of microbial uptake of released aromatic phenolic compounds, depolymerization product of lignin, by toluene. Eight different aromatic phenolic compounds were identified. Until day 17 only 3 phenolic compounds were regularly detec

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15

Bobei, Vasile, Daniela-Ionela Ciolea, and Tiberiu Rusu. "Research on Water Quality Indicators at the Rovinari Power Plant." Mining Revue 29, no. 3 (2023): 60–67. http://dx.doi.org/10.2478/minrv-2023-0024.

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Abstract Indicators of: pH, temperature, conductivity, filtered residue at 105°C, suspended matter, ammonium, chemical oxygen consumption-CCOCr, chlorides, biochemical oxygen consumption - CBO5, sulfates, extractable substances with organic solvents, petroleum products, total iron, calcium, magnesium, sulfides and hydrogen sulfide. The excesses recorded in the sulfate and ammonium indicators in the phreatic waters within the unit premises and in the area of the slag and ash deposits are mainly due to natural causes and to a small extent to anthropogenic action. In accordance with the specializ

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16

Henry, Brian, May Abdel Aziz, Qibing Zhou, and Umesh Desai. "Sulfated, low-molecular-weight lignins are potent inhibitors of plasmin, in addition to thrombin and factor Xa: Novel opportunity for controlling complex pathologies." Thrombosis and Haemostasis 103, no. 03 (2010): 507–15. http://dx.doi.org/10.1160/th09-07-0454.

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SummaryRecently we prepared sulfated, low-molecular-weight lignins (LMWLs) to mimic the biological activities of heparin and heparan sulfate. Chemo-enzymatically prepared sulfated LMWLs represent a library of diverse non-sugar, aromatic molecules with structures radically different from the heparins, and have been found to potently inhibit thrombin and factor Xa. To assess their effect on the fibrinolytic system, we studied the interaction of LMWLs with human plasmin. Enzyme inhibition studies indicate that the three sulfated LMWLs studied inhibit plasmin with IC50 values in the range of 0.24

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17

Selyanina, S. B., and N. V. Selivanova. "Hydrophilic-oleophilic properties of sulfate lignin." Russian Journal of Applied Chemistry 80, no. 7 (2007): 1140–44. http://dx.doi.org/10.1134/s1070427207070257.

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18

Salman, Salman, Kurniawan Sinaga, Meutia Indriana, Yessi Febriani, and Zulfikar Zulfikar. "Pengaruh fermentasi tepung kulit kopi Oleh Aspergillus oryzae dengan penambahan dua variasi konsentrasi urea dan amonium sulfat terhadap penurunan serat kasar." Journal of Pharmaceutical and Sciences 6, no. 1 (2023): 167–77. http://dx.doi.org/10.36490/journal-jps.com.v6i1.47.

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Tingginya hasil produksi kopi menyebabkan terjadinya peningkatan jumlah limbah kulit kopi yang dihasilkan, sehingga dibutuhkan inovasi baru untuk mengolah limbah kopi agar dapat bermanfaat dan tidak terbuang. Penelitian bertujuan untuk menurunkan serat kasar pada kulit kopi yang difermentasi menggunakan Aspergillus oryzae untuk menjadi pakan ternak. Penelitian dilakukan dengan metode eksperimental dan deskriptif, memakai bahan uji tepung kulit kopi (Coffea sp.), Aspergillus oryzae, urea, amonium sulfat dan mineral. Tepung kulit kopi difermentasi pada media kering dan media basah, di fermentasi

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19

Cai, Jin Ke, and Yong Sheng Zhang. "The Relative Performance Study of Foam Concrete Straw-Based." Advanced Materials Research 788 (September 2013): 646–50. http://dx.doi.org/10.4028/www.scientific.net/amr.788.646.

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The experiment is to extract lignin from straw as the basic material, then to develop cheap resin. By mechanical foaming, we are to research lignin-based epoxy compounds with commercial foaming agent or sodium lauryl sulfate and the foam stabilizing effect under the experimental condition that adding or not coagulant. The study shows that the actual amount of foam can change the strength and weight of foam concrete to some extent. The results of experimental show that the lignin-based epoxy resins prepared by inexpensive straw can be applied YX-M-8-type foaming agent and the modification of so

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20

LI, ZHULIN, SHUAI GAO, LEI TANG, et al. "Utilization of palm fiber as papermaking materials: Microscopic structure and chemical pulping." October 2022 21, no. 10 (2022): 543–51. http://dx.doi.org/10.32964/tj21.10.543.

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The microscopic structure and pulping properties of palm fiber were explored. Soda cooking and sulfate cooking were conducted and compared in terms of physical strength of the obtained pulps. Sulfate pulp showed better performance than soda pulp, as indicated by the 23% higher tensile index, 49% higher tear index, and 36% higher burst index. To further elevate physical strength, long fibered pulp (LFP), namely commercial softwood sulfate pulp, was mixed with sulfate pulp of palm fiber at levels from 20% to 50%. At the blend level of 50%, tensile index of 52.13 N•m/g, tear index of 15.63 mN•m2/

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21

Raghuraman, Arjun, Vaibhav Tiwari, Qian Zhao, Deepak Shukla, Asim K. Debnath, and Umesh R. Desai. "Viral Inhibition Studies on Sulfated Lignin, a Chemically Modified Biopolymer and a Potential Mimic of Heparan Sulfate." Biomacromolecules 8, no. 5 (2007): 1759–63. http://dx.doi.org/10.1021/bm0701651.

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22

Glyad, V. M., D. A. Ponomarev, and N. K. Politova. "Characteristics of residual lignin from sulfate pulp." Russian Journal of Bioorganic Chemistry 37, no. 7 (2011): 849–54. http://dx.doi.org/10.1134/s1068162011070089.

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23

Oregui-Bengoechea, Mikel, Iñaki Gandarias, Nemanja Miletic, et al. "Thermocatalytic conversion of lignin in an ethanol/formic acid medium with NiMo catalysts: Role of the metal and acid sites." Applied Catalysis B: Environmental 2017, no. 217 (2017): 353–64. https://doi.org/10.1016/j.apcatb.2017.06.004.

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NiMo catalysts supported on different sulfated and non-sulfated aluminas and zirconias were studied for the catalytic conversion of lignin in a formic acid/ethanol medium. All the pre-reduced NiMo-support combinations resulted in high conversion of lignin into bio-oil, with over 60% yield (mass%). The NiMo-sulfated alumina catalyst exhibited the highest activity among all the catalysts studied. The overall reaction mechanism of the catalytic lignin conversion was found to be especially complex. The oil yield and its properties are affected by a combination of successive catalytic reactions tha

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24

Brandt, Agnieszka, Long Chen, Bart E. van Dongen, Tom Welton, and Jason P. Hallett. "Structural changes in lignins isolated using an acidic ionic liquid water mixture." Green Chemistry 17, no. 11 (2015): 5019–34. http://dx.doi.org/10.1039/c5gc01314c.

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25

Gschwend, Florence J. V., Jason P. Hallett, and Agnieszka Brandt-Talbot. "Exploring the Effect of Water Content and Anion on the Pretreatment of Poplar with Three 1-Ethyl-3-methylimidazolium Ionic Liquids." Molecules 25, no. 10 (2020): 2318. http://dx.doi.org/10.3390/molecules25102318.

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We report on the pretreatment of poplar wood with three different 1-ethyl-3-methylimidazolium ionic liquids, [EMim][OAc], [EMim][MeSO3], and [EMim][HSO4], at varying water contents from 0–40 wt% at 100 °C. The performance was evaluated by observing the lignin and hemicellulose removal, as well as enzymatic saccharification and lignin yield. The mechanism of pretreatment varied between the ionic liquids studied, with the hydrogen sulfate ionic liquid performing delignification and hemicellulose hydrolysis more effectively than the other solvents across the investigated water content range. The

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26

Mikova, Nadezhda Mikhaylovna, Vladimir Aleksandrovich Levdansky, Yelena Valentinovna Mazurova, and Boris Nikolayevich Kuznecov. "SYNTHESIS AND STUDY OF THE PROPERTIES OF XEROGELS DERIVED FROM SULFATED PINE ETHANOL LIGNIN." chemistry of plant raw material, no. 1 (March 16, 2021): 45–54. http://dx.doi.org/10.14258/jcprm.2021018242.

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Organic xerogels based on lignin and tannins isolated from pine bark and wood were first obtained by condensation with formaldehyde and furfuryl alcohol in the presence of hydrochloric acid. The use of pine sulfated ethanol lignin made it possible for the first time to obtain sulfur-containing (up to 1.3% wt.) lignin-(tannin)-formaldehyde and lignin-(tannin)-furfuryl xerogels. The density of the obtained gels increases with the addition of tannins to lignin and varies in the range 0.13–0.39 g/cm3. Xerogels synthesized by condensation with furfuryl alcohol are stronger than those obtained using

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27

Selyanina, S. B., L. N. Parfenova, M. V. Trufanova, and N. V. Selivanova. "Hydrodynamic and surfactant properties of sulfate lignin solutions." Russian Journal of Applied Chemistry 84, no. 8 (2011): 1438–41. http://dx.doi.org/10.1134/s107042721108026x.

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Karp, Susan Grace, Vincenza Faraco, Antonella Amore, Luiz Alberto Junior Letti, Vanete Thomaz Soccol, and Carlos Ricardo Soccol. "Statistical Optimization of Laccase Production and Delignification of Sugarcane Bagasse byPleurotus ostreatusin Solid-State Fermentation." BioMed Research International 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/181204.

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Laccases are oxidative enzymes related to the degradation of phenolic compounds, including lignin units, with concomitant reduction of oxygen to water. Delignification is a necessary pretreatment step in the process of converting plant biomass into fermentable sugars. The objective of this work was to optimize the production of laccases and to evaluate the delignification of sugarcane bagasse byPleurotus ostreatusin solid-state fermentation. Among eight variables (pH, water activity, temperature, and concentrations of CuSO4, (NH4)2SO4, KH2PO4, asparagine, and yeast extract), copper sulfate and

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Putri, Nita Ariestiana, Muhammad Mufti Azis, and Suryo Purwono. "A Comparison of Sodium Lignosulfonate (SLS) Synthesis from Black Liquor Lignin and Commercial Lignin." Materials Science Forum 948 (March 2019): 206–11. http://dx.doi.org/10.4028/www.scientific.net/msf.948.206.

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Sulphonation of lignin has been considered as a promising step to produce lignosulfonate which may serve as dispersant, flocculant, and surfactant. The aim of present study was to compare the synthesis of sodium lignosulfonate (SLS) from different lignin feedstocks namely commercial lignin and lignin isolated from black liquor (BL) of pulp and paper industry. A novel technique to isolate lignin from BL was introduced with the aid of CO2 and coagulant of alumunium sulfate. The FTIR spectra of BL lignin showed similarity with commercial lignin which indicates that the isolation of BL lignin with

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Ghavidel Darestani, Nasim, Adrianna Tikka, and Pedram Fatehi. "Sulfonated Lignin-g-Styrene Polymer: Production and Characterization." Polymers 10, no. 8 (2018): 928. http://dx.doi.org/10.3390/polym10080928.

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Among sustainable alternatives for replacing fossil-based chemicals, lignin is widely available on earth, albeit the least utilized component of biomass. In this work, lignin was polymerized with styrene in aqueous emulsion systems. The reaction afforded a yield of 20 wt % under the conditions of 100 g/L lignin concentration, pH 2.5, 0.35 mol/L sodium dodecyl sulfate concentration, 5 mol/mol styrene/lignin ratio, 5 wt % initiator, 90 °C, and 2 h. The lignin-g-styrene product under the selected conditions had a grafting degree of 31 mol % of styrene, which was determined by quantitative proton

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Smirnova, Anastasiya Igorevna, Alla Borisovna Dyagileva, Aleksandra Yevgen'yevna Prismakova, and Ol'ga Yur'yevna Derkacheva. "INFLUENCE OF LIGNIN CONCENTRATION ON VISCOELASTIC PROPERTIES OF ITS MODIFIED FORM OB-TAINED BY SOL-GEL METHOD IN THE PRESENCE OF ALUMINUM-SILICON COMPOUNDS." chemistry of plant raw material, no. 3 (September 27, 2021): 123–33. http://dx.doi.org/10.14258/jcprm.2021038697.

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The concept and flow model of a structured dispersed system obtained on the basis of sulfate lignin modified by Sol-gel method in the presence of aluminum-containing components in the form of nepheline concentrate are considered. The systems are mainly systems of non-Newtonian behavior, characterized by phenomena of destruction and formation of new structures in the shear flow, and the nature of the flow depends on the characteristics of interaction between system components, which are defined as their concentrations, and process conditions of the synthesis, at which the change of the adhesion

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Danshina, К., and Т. Filonenko. "FEATURES OF A COMPREHENSIVE FORENSIC RESEARCH OF HYDROLYZED LIGNIN." Theory and Practice of Forensic Science and Criminalistics 19, no. 1 (2019): 503–10. http://dx.doi.org/10.32353/khrife.1.2019.40.

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The article deals with the peculiarities of complex expert research of lignin, since knowledge of the forensic and chemical and forensic examinations was required. It was noted that in the microscopic study, all of the samples submitted for research revealed small particles of brown wood with different shades and brown conglomerates. The maceration method investigated specially processed samples of the substances provided. A qualitative reaction to lignin revealed the presence of molecules provided for the study of substances, the conifer aldehyde group and the structural chain that is charact

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Luo, Zhicheng, та Chen Zhao. "Mechanistic insights into selective hydrodeoxygenation of lignin-derived β-O-4 linkage to aromatic hydrocarbons in water". Catalysis Science & Technology 6, № 10 (2016): 3476–84. http://dx.doi.org/10.1039/c5cy01434d.

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The route for selective hydrodeoxygenation of phenethoxybenzene (PEB, which represents the dominant β-O-4 linkage in lignin) to produce benzene and ethylbenzene is realized by employing a multi-functional Ru/sulfate zirconium (Ru/SZ) catalyst in the aqueous phase.

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Norgren, Magnus, and Sofia Mackin. "Sulfate and Surfactants as Boosters of Kraft Lignin Precipitation." Industrial & Engineering Chemistry Research 48, no. 10 (2009): 5098–104. http://dx.doi.org/10.1021/ie900141s.

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Luo, Zhicheng, Yimeng Wang, Mingyuan He, and Chen Zhao. "Precise oxygen scission of lignin derived aryl ethers to quantitatively produce aromatic hydrocarbons in water." Green Chemistry 18, no. 2 (2016): 433–41. http://dx.doi.org/10.1039/c5gc01790d.

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To produce aromatic hydrocarbons from biomass, a novel route is reported for one-pot selective hydrodeoxygenation of a lignin derived aryl ether mixture to C<sub>6</sub>–C<sub>9</sub> aromatic hydrocarbons over Ru/sulfate zirconia in the aqueous phase.

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Azhar, Nur Amalina, Sabrina Soloi, Rohah A. Majid, and Jamarosliza Jamaluddin. "Grafting Efficiency of Lignin-Grafted-Polyacrylic Acid." Applied Mechanics and Materials 735 (February 2015): 182–85. http://dx.doi.org/10.4028/www.scientific.net/amm.735.182.

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Agriculture biomasses have been successfully converted into value-added products such as biocomposite plastics, furniture, papers and textiles. However, only the cellulose parts of these lignocellulosic materials are being used while other components such as lignin and wax are discarded. For a tropical country like Malaysia, banana stem is one of the sources of biomasses. Like other biomasses-based products, only cellulose part of banana stem is used while the lignin portion is discarded due to overly hydrophilic character. This water-loving property of lignin can be manipulated into specific

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Detmers, J., U. Schulte, H. Strauss, and J. Kuever. "Sulfate Reduction at a Lignite Seam: Microbial Abundance and Activity." Microbial Ecology 42, no. 3 (2001): 238–47. http://dx.doi.org/10.1007/s00248-001-1014-8.

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Febriani, Cindy Yulia. "HIDROLISIS LIGNOSELULOSA DAN KARAKTERISASI LIGNIN DARI MATERIAL LIMBAH KELAPA DENGAN METODE HIDROLISIS ASAM SULFAT." Jurnal Teknologi Kimia Unimal 10, no. 2 (2021): 45. http://dx.doi.org/10.29103/jtku.v10i2.5573.

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Penelitian ini melakukan hidrolisis lignoselulosa menggunakan asam sulfat dengan limbah kelapa berupa batok dan sabut kelapa untuk memeroleh zat lignin. Rasio padatan:larutan yang digunakan sebesar 3:25 (m/v). Variasi waktu pemanasan 2 hingga 5 jam. Lignin tidak larut asam yang diperoleh diuji karakterisasi menggunakan FT-IR dan SEM. Rata-rata yield lignin tidak larut dan larut asam pada batok kelapa lebih besar daripada sabut kelapa. Gugus metoksil menghilang setelah hidrolisis, gugus guaiasil terdeteksi pada batok kelapa setelah proses hidrolisis, adanya cincin aromatik yang berkaitan dengan

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Chen, Yuanhang, Zhenyun Yan, Long Liang, et al. "Comparative Evaluation of Organic Acid Pretreatment of Eucalyptus for Kraft Dissolving Pulp Production." Materials 13, no. 2 (2020): 361. http://dx.doi.org/10.3390/ma13020361.

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Pretreatment is an essential process for the extensive utilization of lignocellulose materials. The effect of four common organic acid pretreatments for Kraft dissolving pulp production was comparatively investigated. It was found that under acidic conditions, hemicellulose can be effectively removed and more reducing sugars can be recovered. During acetic acid pretreatment, lignin that was dissolved in acetic acid could form a lignin-related film which would alleviate cellulose hydrolysis, while other organic acids caused severe cellulose degradation. Scanning electron microscopy (SEM), Fouri

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Jiménez Montoya, Jesús Alvaro, Bibiana Gordillo Díaz, and Marco Antonio Vega Atuesta. "Modificación estructural de la lignina extraída a partir de carbones de bajo rango para la obtención de madera sintética." Revista Tecnura 15, no. 28 (2012): 68. http://dx.doi.org/10.14483/udistrital.jour.tecnura.2011.1.a06.

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El grupo Investigación en Carbones de la Universidad Distrital Francisco José de Caldas ha trabajado en la extracción de lignina a partir de carbón de bajo rango y de turba, con el fin de emplearla en la elaboración de madera sintética y de esta manera aplicarla a la industria maderera.En una primera parte se aplicaron los métodos Sosa, Sulfato y Bisulfito [1], modificados para la extracción de lignina a partir de pino y cedro, se evidenció que el método Sosa era el de mayor rendimiento. Este método fue aplicado para la extracción de liglina a partir de una muestra de carbón leonardítico. Po

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Ko, Jae-Jung, Yoshihisa Shimizu, Kazuhiro Ikeda, Seog-Ku Kim, Chul-Hwi Park, and Saburo Matsui. "Biodegradation of high molecular weight lignin under sulfate reducing conditions: Lignin degradability and degradation by-products." Bioresource Technology 100, no. 4 (2009): 1622–27. http://dx.doi.org/10.1016/j.biortech.2008.09.029.

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Yan, Qiangu, Jinghao Li, Xuefeng Zhang, Jilei Zhang, and Zhiyong Cai. "Synthetic Bio-Graphene Based Nanomaterials through Different Iron Catalysts." Nanomaterials 8, no. 10 (2018): 840. http://dx.doi.org/10.3390/nano8100840.

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Kraft lignin was catalytically graphitized to graphene-based nanostructures at 1000 °C under argon atmosphere with four iron catalysts, iron(III) nitrate (Fe-N); iron(II) chloride (Fe-Cl2); iron(III) chloride (Fe-Cl3); and iron(II) sulfate (Fe-S). The catalytic decomposition process of iron-promoted lignin materials was examined using thermalgravimetric analysis and temperature-programmed decomposition methods. The crystal structure, morphology and surface area of produced materials were characterized by means of X-ray diffraction, Raman, scanning electron microscopy, high resolution transmiss

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Raghuraman, Arjun, Vaibhav Tiwari, Jay N. Thakkar, et al. "Structural Characterization of a Serendipitously Discovered Bioactive Macromolecule, Lignin Sulfate." Biomacromolecules 6, no. 5 (2005): 2822–32. http://dx.doi.org/10.1021/bm0503064.

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Anghel, Narcis, Irina Apostol, Ioana Plaesu, et al. "Polysaccharide Composites with Rosa canina for Sustained Anti-Inflammatory Skin Therapy." Polymers 17, no. 12 (2025): 1707. https://doi.org/10.3390/polym17121707.

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This study presents novel skin-compatible biomaterials based on guar gum and dextran sulfate matrices, incorporating softwood lignin, lignin esterified with aspartic acid, and Rosa canina extract. The materials were prepared via casting and evaluated for physicochemical, mechanical, and biological properties. Spectroscopic analyses confirmed successful lignin esterification, with new carbonyl and amide peaks and a nitrogen signal (3.83%) detected. Rosa canina extract enhanced the Young’s modulus from 1.42 MPa to 3.18 MPa and reduced elongation at break from 34.88 mm to 25.19 mm. The combinatio

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Qaraoui, Imane, and Liu Lingyun. "STUDY ON THE INFLUENCE MECHANISM OF DEHYDRATION AND DEVOLATILIZATION ON VARIOUS FORMS OF SULFUR IN COAL WITH DIFFERENT METAMORPHIC DEGREES." International Journal of Advanced Research 13, no. 01 (2025): 1258–70. https://doi.org/10.21474/ijar01/20313.

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Dehydration and devolatilization on the behavior and phase transformations of various sulfur forms in coal with different metamorphic grade. The nature of sulfur in coal includes and pyritic, sulfate, organic, and elemental sulphur, and the fate of these forms during thermal processes determines the merits of desulfurisation. It was determined through thermal experiments conducted on coals of different metamorphic classes (lignite, bituminous, anthracite) that the dehydration process has a modest but measurable impact on sulfur oxidation with major changes recorded in the high-density coals. A

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Albis Arrieta, Alberto Ricardo, Maria Cecilia Romero Castilla, Ever Ortiz Muñoz, Ismael Enrique Piñeres Ariza, and Edgar Fabian Donado Medina. "Devolatilization of African Palm (Elaeis guineensis) Husk Catalyzed by Ferrous Sulfate Studied by TG-MS." Ingeniería e Investigación 42, no. 3 (2022): e90946. http://dx.doi.org/10.15446/ing.investig.90946.

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By means of a thermogravimetric analysis coupled with mass spectroscopy, the catalytic effect of ferrous sulfate on the pyrolysis of African Palm husk (APH) was studied. Thermogravimetric data were adjusted to the distributed activation energy model (DAEM) with four pseudo-components. Ferrous sulfate had a strong influence on the decomposition parameters of the second and fourth pseudo-components of the DAEM, which are identified as hemicellulose and lignin, respectively. The profiles of the signal intensity curves for the selected m/z ratios were successfully modeled using the kinetic paramet

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Henry, Brian L., Justin Connell, Aiye Liang, Chandravel Krishnasamy, and Umesh R. Desai. "Interaction of Antithrombin with Sulfated, Low Molecular Weight Lignins." Journal of Biological Chemistry 284, no. 31 (2009): 20897–908. http://dx.doi.org/10.1074/jbc.m109.013359.

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48

Jiang, Huabin, Jiaqi Nie, Lei Zeng, et al. "Selective Removal of Hemicellulose by Diluted Sulfuric Acid Assisted by Aluminum Sulfate." Molecules 29, no. 9 (2024): 2027. http://dx.doi.org/10.3390/molecules29092027.

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Hemicellulose can be selectively removed by acid pretreatment. In this study, selective removal of hemicellulose was achieved using dilute sulfuric acid assisted by aluminum sulfate pretreatment. The optimal pretreatment conditions were 160 °C, 1.5 wt% aluminum sulfate, 0.7 wt% dilute sulfuric acid, and 40 min. A component analysis showed that the removal rate of hemicellulose and lignin reached 98.05% and 9.01%, respectively, which indicated that hemicellulose was removed with high selectivity by dilute sulfuric acid assisted by aluminum sulfate pretreatment. Structural characterizations (SEM

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49

Prismakova, A. E., A. B. Dyagileva, and A. I. Smirnova. "Rheological Properties of Sulfate Lignin Modified by the Sol-Gel Method." Bulletin of Higher Educational Institutions. Lesnoi Zhurnal (Forestry journal), no. 3 (May 10, 2018): 137–48. http://dx.doi.org/10.17238/issn0536-1036.2018.3.137.

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Khabarov, Yu G., N. Yu Kuzyakov, V. A. Veshnyakov, G. V. Komarova, and A. Yu Garkotin. "Nitration of sulfate lignin under homogeneous conditions studied by electron spectroscopy." Russian Chemical Bulletin 65, no. 12 (2016): 2925–31. http://dx.doi.org/10.1007/s11172-016-1679-2.

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