Relevant bibliographies by topics / Modifierad lignin

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Modifierad lignin'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Modifierad lignin"

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Akim, Leonid G., Dimitris S. Argyropoulos, Lise Jouanin, et al. "Quantitative 31P NMR Spectroscopy of Lignins from Transgenic Poplars." Holzforschung 55, no. 4 (2001): 386–90. http://dx.doi.org/10.1515/hf.2001.064.

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Summary Milled wood lignins isolated from genetically modified poplar trees were studied by quantitative 31P NMR spectroscopy, in combination with thioacidolysis and mild alkaline hydrolysis. The genetic transformation of the trees included down regulation of CAD and COMT enzyme activities. These analyses confirmed that moderate CAD down-regulation does not substantially alter lignin structure. In contrast, severe CAD deficiency alters the lignin structure more profoundly by decreasing the syringyl/guaiacyl ratio and increasing the degree of condensation of the lignin. The most severe alterati
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Budnyak, Tetyana, Selda Aminzadeh, Ievgen Pylypchuk, et al. "Peculiarities of Synthesis and Properties of Lignin–Silica Nanocomposites Prepared by Sol-Gel Method." Nanomaterials 8, no. 11 (2018): 950. http://dx.doi.org/10.3390/nano8110950.

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The development of advanced hybrid materials based on polymers from biorenewable sources and mineral nanoparticles is currently of high importance. In this paper, we applied softwood kraft lignins for the synthesis of lignin/SiO2 nanostructured composites. We described the peculiarities of composites formation in the sol-gel process through the incorporation of the lignin into a silica network during the hydrolysis of tetraethoxysilane (TEOS). The initial activation of lignins was achieved by means of a Mannich reaction with 3-aminopropyltriethoxysilane (APTES). In the study, we present a deta
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Muller, Louis Christiaan, Sanette Marx, Hermanus CM Vosloo, and Idan Chiyanzu. "Functionalising lignin in crude glycerol to prepare polyols and polyurethane." Polymers from Renewable Resources 10, no. 1-3 (2019): 3–18. http://dx.doi.org/10.1177/2041247919830833.

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In this work, crude glycerol liquefaction of lignins produced in the pulp and paper industry, as well as an organosolv lignin (sugarcane bagasse), was studied with the ultimate aim of preparing bio-based polyols for polyurethane (PU) preparation. This is a proposed strategy to valorise the by-products of biodiesel and lignocellulose biorefineries. Size-exclusion chromatography revealed that the lignins behave differently during liquefaction based on a ranging product molecular weight (MW). The MW of the liquefaction products was concluded to be related to the phenolic and aliphatic hydroxyl gr
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Vishtal, Alexey, and Andrzej Kraslawski. "Challenges in industrial applications of technical lignins." BioResources 6, no. 3 (2011): 3547–68. http://dx.doi.org/10.15376/biores.6.3.3547-3568.

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The primary aim of modern biorefineries is the efficient conversion of lignocellulosic materials into valuable products. Sugars and oils can be converted into valuable chemicals, but processing of lignin is still a challenge. A vast amount of lignin is incinerated to produce process steam and energy, and only a very small part is used for the production of value-added products. Technical lignins are isolated as by-streams in lignocellulosic refineries, e.g., as kraft, soda, organosolv, and hydrolysis lignins, as well as lignosulphonates. They have a modified structure and contain impurities th
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Vishtal, Alexey, and Andrzej Kraslawski. "Challenges in industrial applications of technical lignins." BioResources 6, no. 3 (2011): 3547–68. http://dx.doi.org/10.15376/biores.6.3.vishtal.

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The primary aim of modern biorefineries is the efficient conversion of lignocellulosic materials into valuable products. Sugars and oils can be converted into valuable chemicals, but processing of lignin is still a challenge. A vast amount of lignin is incinerated to produce process steam and energy, and only a very small part is used for the production of value-added products. Technical lignins are isolated as by-streams in lignocellulosic refineries, e.g., as kraft, soda, organosolv, and hydrolysis lignins, as well as lignosulphonates. They have a modified structure and contain impurities th
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Lv, Xin Ying, Qiang Liu, Yan Hua Zhang, and Ming Wei Di. "Compatibility of Lignin/LDPE Composites Modified with HDPE-G-MAH." Advanced Materials Research 181-182 (January 2011): 88–91. http://dx.doi.org/10.4028/www.scientific.net/amr.181-182.88.

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Lignin have been blended with low density polyethylene (LDPE). Maleic anhydride grafted high density polyethylene (HDPE-g-MAH) has been added as compatibilizing agent. The weight ratio of LDPE, ligin and HDPE-a-MAH were 75:25:7.5, 75:25:10 and 75:25:12.5, respectively. The mechanical properties of the blends were investigated according to Chinese standard GB/1447-2005 and compared with those of lignin/LDPE composites without compatibilizing agent. Scanning electron microscopy (SEM) was used to investigate the dispersion of the lignin and LDPE and the compatibilizing mechanism was analyzed. The
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Govender, Priyashnie, B. M. Majeke, Abiodun Oluseun Alawode, Johans F. Gorgens, and Luvuyo Tyhoda. "The Use of South African Spent Pulping Liquor to Synthesize Lignin Phenol-Formaldehyde Resins." Forest Products Journal 70, no. 4 (2020): 503–11. http://dx.doi.org/10.13073/fpj-d-20-00047.

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Abstract This study aims to investigate the potential of using lignin sourced from South African black liquor as a total phenol substitute in phenol-formaldehyde resins (PFRs), with a particular focus on bonding strength and curing properties. Four South African pulping-based lignins were used to synthesize these lignin-phenol formaldehyde resins (LPF100 resins), namely Eucalyptus Kraft lignin, Pine Kraft lignin, Bagasse Soda lignin, and Bagasse Steam Exploded lignin. Fourier-transform infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry were used to determi
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Sevillano, R. M., G. Mortha, M. Barrelle, and D. Lachenal. "19F NMR Spectroscopy for the Quantitative Analysis of Carbonyl Groups in Lignins." Holzforschung 55, no. 3 (2001): 286–95. http://dx.doi.org/10.1515/hf.2001.048.

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Summary The amount of carbonyl groups in an organosolv lignin was determined by 19F NMR spectroscopy after different derivatizations: derivatization with trifluoromethylphenylhydrazine, fluorobenzoylation of alcohol groups formed after NaBH4 reduction of lignin, fluorobenzoylation of phenolic hydroxyl groups after catalytic hydrogenation of lignin. Oximation was also used for comparison. Carbonyl group contents determined by 19F NMR after trifluoromethylphenylhydrazine derivatization were in good correlation with results from other methods. Trifluoromethylphenylhydrazine derivatization is a fa
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BUJANOVIC, BILJANA M., MANGESH J. GOUNDALKAR, and THOMAS E. AMIDON. "Increasing the value of a biorefinery based on hot-water extraction: Lignin products." January 2012 11, no. 1 (2012): 19–26. http://dx.doi.org/10.32964/10.32964/tj11.1.19.

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In conventional pulping technologies, lignin is used mainly as a low-cost source of energy. Small quantities of industrially produced lignin are used for the production of chemicals and materials. Biorefinery technologies are emerging that have an ultimate goal of replacing fossil sources for the production of fuels and other products. To achieve this goal effectively, biorefinery technologies must take advantage of lignin as the most abundant natural aromatic polymer and use it to add higher-value products to product portfolios. Lignin has the potential to be used in making a broad range of h
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Popova, Olga, and Tatyana Finochenko. "Synthesis and properties of ion-exchange materials based on hydrolysis lignins." E3S Web of Conferences 273 (2021): 04011. http://dx.doi.org/10.1051/e3sconf/202127304011.

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Hydrolytic lignin is a large-tonnage waste product of ethyl alcohol production and is a renewable resource. The structure of lignin is characterized by the presence of a large number of hydroxyl groups, which provides the value of lignin as a raw material for synthesis in polymer chemistry. But due to their low chemical stability in dilute alkalis, acids and solvents, lignins are of little use for wide practical use. The introduction of additional functional groups into the lignin maromolecule by oxidative modification with the use of resource-saving technologies makes it possible to obtain ne
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Dissertations / Theses on the topic "Modifierad lignin"

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Xu, Xueyan. "Development of Kraft Lignin and Coating Technique to Prepare Coated Urea Fertilisers with Increased Nutrient Use Efficiency." Thesis, KTH, Skolan för kemivetenskap (CHE), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-218111.

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Coating urea to prepare controlled release N-fertilizer has been considered as an effective way to increase its nutrient use efficiency, thus reduce its waste and the consequent harmful environmental impacts. Inorganic sulphur and synthetic polymers have been used in the industry as coating materials together with utilization of various types of expensive coating equipment which commonly requires also complicated technical setup and controls. As development trends, biopolymers are attention-grabbing to replace the synthetic polymers. Alternative simple coating technique is also desired. So far
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Prieur, Benjamin. "Modified lignin as flame retardant for polymeric materials." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10083/document.

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Ce travail consiste à contribuer à la valorisation de la lignine, un sous-produit important de l’industrie du papier. L’objectif est d’utiliser la lignine comme retardateur de flamme (FR) pour les matériaux polymères. Dans un premier temps, la lignine fut phosphorylée. Des analyses structurales ont permis d’établir que du phosphore est lié de manière covalente à la lignine. La conséquence est que la stabilité thermique ainsi que la quantité de résidu charbonné sont fortement améliorées. Les lignines de départ et phosphorylée ont été incorporées dans des polymères thermoplastiques afin d’évalue
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Hepworth, David G. "The mechanical properties of tobacco plants with genetically modified lignin." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339456.

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Ahmed, Ismail Mostafa. "Modified lignin as replacement of carbon black in elastomers- For the development of sustainable tyre technology : The substitution of carbon black with modified lignin- Green tyre technology." Thesis, Karlstads universitet, Avdelningen för kemiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-78707.

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Due to its large flexibility, low-price, large availability, and properties lignin is seen as an important compound with a wide range of applications. The increasing demand of fossil-based rubber materials is causing a serious threat to the environment and it is contributing to plastic- and marine pollution, ozone depletion and carbon dioxide emission (CO2) [1,2]. Numerous toxicological researches highlight that Carbon black may act as a universal carrier of wide variety of chemicals of varying toxicity to the human body [3,4]. Consequently, researcher endeavours in finding sustainable and eco
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Roque-Rivera, Raysa. "Carbon budget and soil dynamics in response to lignin modified Populus tremuloides." abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1472974.

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Ni, Pei. "The synthesis of polyurethanes from non-modified lignin using a polymerization catalyst." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0028/MQ62141.pdf.

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Ma, Yujie, Petra Berends, René Pauli, Mark Wijland, Roberto Rumnit, and Rob Meulenbroek. "Lignin-Modified Phenolic Syntan - 129: A Contributor to Our Bio-Based Solutions." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34175.

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Content: In order to contribute to a more sustainable leather manufacturing process and leather value chain, in 2016 Smit & zoon started its own designing process of new products through the Bio-Based innovation platform. As a logical first step, answers to several key questions have been looked for: What is Bio-Based? What is renewable? Which term and method do we use to define the Bio-Based content in the Bio-Based platform? What is biodegradable? How do our current products perform? What is our vision for future products? In the process of answering these questions and guided by the Cradle-
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Sutela, S. (Suvi). "Genetically modified silver birch and hybrid aspen:target and non-target effects of introduced traits." Doctoral thesis, Oulun yliopisto, 2014. http://urn.fi/urn:isbn:9789526206844.

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Abstract The efforts to improve forest trees could be accelerated by means of genetic engineering. Thus, the performance and effects of genetically modified (GM) trees have been investigated in numerous studies, which have generally concluded that GM trees have similar effects on environment and/or other organisms as do conventionally bred trees. In the present study, GM silver birch (Betula pendula Roth) and hybrid aspen (Populus tremula L. × tremuloides Michx.) lines were utilized to study the influence of transgenes to the transcription of related endogenous genes and to the production of s
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Wang, Di. "Sustainable corrosion protection for metallic materials by Mussel adhesive protein modified lignin film." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-275728.

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Lignin has the potential to be used as green material to inhibit the corrosion of metallic substrates. Mussel adhesive protein is used to modify lignin due to its great adhesive and film forming abilities. Electrochemical impedance spectroscopy (EIS) has been applied to in-situ measure the corrosion resistance of the formed surface composite films in the corrosive environment. The equivalent circuit is used to fit the EIS data to obtain the quantitative results of the surface films. The results show that MAP modified lignin composite film can provide enhanced corrosion protection to the carbon
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Mohammad, Zadeh Elham. "Physicochemical Properties and Antioxidant Activity of Enzymatic Modified Soy Protein Isolate Films with Lignin." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/83226.

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In this study, a sustainable packaging system was developed to provide food safety and security. Soy protein isolate (SPI) was enzymatically modified by transglutaminase under different conditions to ensure desirable and optimized enzyme crosslinking activity before film preparation. Physicochemical properties including viscosity and molecular weight distribution of the modified proteins and films were measured. Results confirmed the enzymatic treatment is an effective way to modify the SPI based biopolymeric film. Modified films with the enzyme had significant increases in tensile strength (
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Books on the topic "Modifierad lignin"

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Gan, Lin, Jin Huang, and Shiyu Fu. Materials from Modified Lignin. Elsevier, 2019.

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Communication sur la sécurité des vaccins: Lignes directrices pour aider le personnel de santé à communiquer avec les parents, les soignants et les patients. Pan American Health Organization, 2021. http://dx.doi.org/10.37774/9789275222829.

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Les vaccins sauvent entre 2 et 3 millions de vies chaque année et protègent l’ensemble de la population contre plus d’une douzaine de maladies potentiellement mortelles. Grâce à la vaccination, la variole a été éradiquée en 1980 et nous sommes sur la bonne voie pour éradiquer la polio. Cependant, malgré de grands progrès dans la lutte contre la rougeole, l’une des maladies les plus contagieuses connues, une augmentation des cas a été malheureusement observée ces dernières années. Raison pour laquelle une couverture vaccinale élevée (95 % ou plus) est nécessaire en dépit du défi technique et de
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Book chapters on the topic "Modifierad lignin"

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Cook, Phillip M., and Terry Sellers. "Organosolv Lignin-Modified Phenolic Resins." In ACS Symposium Series. American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0397.ch024.

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HÄggman, Hely, Karoliina Niemi, Heidi Tiimonen, Tiina Ylioja, and Vincent Chiang. "Environmental Aspects of Lignin Modified Trees." In Tree Transgenesis. Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/3-540-32199-3_5.

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Katsumata, Kyoko, and Gyosuke Meshitsuka. "Modified Kraft Lignin and Its Use for Soil Preservation." In Chemical Modification, Properties, and Usage of Lignin. Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0643-0_9.

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"Applications of Modified and Unmodified Lignins." In Lignin and Lignans as Renewable Raw Materials. John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118682784.ch8.

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"Lignin-Modified Thermoplastic Materials." In Lignin Chemistry and Applications. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-813941-7.00005-9.

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"Lignin-Modified Thermosetting Materials." In Lignin Chemistry and Applications. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-813941-7.00006-0.

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"Lignin-Modified Materials and Their Applications." In Lignin Chemistry and Applications. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-813941-7.00007-2.

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"Structure, Characterization, and Performance Evaluation of Lignin-Modified Materials." In Lignin Chemistry and Applications. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-813941-7.00008-4.

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Pilate, Gilles, Annabelle Dejardin, and Jean-Charles Leple. "Field Trials with Lignin-Modified Transgenic Trees." In Lignins - Biosynthesis, Biodegradation and Bioengineering. Elsevier, 2012. http://dx.doi.org/10.1016/b978-0-12-416023-1.00001-x.

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Priyanka, Miss, Dileep Kumar, Uma Shankar, Anurag Yadav, and Kusum Yadav. "Agricultural Waste Management for Bioethanol Production." In Biotechnology. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8903-7.ch019.

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This chapter contends that bioethanol has received the most attention over other fuels due to less emission of greenhouse gases and production from renewable sources. It is mainly produced from sugar containing feedstocks. Since feedstocks are utilized as food for humans, its consumption in bioethanol production creates a food crisis for the entire world. Bioethanol derived from agriculture waste, which is most abundant at global level, is the best option. Agriculture wastes contain lignin, cellulose and hemicelluloses which creates hindrances during conversion to ethanol. Pretreatment of agriculture wastes remove lignin, hemicelluloses and then enzymatically hydrolyzed into sugars. Both pentose and hexose sugars are fermented to bioethanol. There are still various problems for developing an economically feasible technology but a major one is the resistance to degradation of the agricultural material. Use of two or more pretreatment methods for delignification and the use of genetically modified agricultural biomass can be developed for economically feasible ethanol production.
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Conference papers on the topic "Modifierad lignin"

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Popović, Ana, Jelena Rusmirović, Maja Đolić, Zlate Veličković, and Aleksandar Marinković. "Lignin Based Porous, Microsphere-Shaped Adsorbent Functionalized with Magnetite Nanoparticles for Effective Chromate Anions Removal." In 34th International Congress on Process Industry. SMEITS, 2021. http://dx.doi.org/10.24094/ptk.021.34.1.133.

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Research goal of this paper represents a novel method of synthesis of an amino-modified, highly effective natural polymer adsorbent kraft lignin based, functionalized with magnetite nanoparticles, for effective removal of chromate anions from water solution. Amino-modified lignin microspheres (LMS-NM) were synthesized via inverse suspension copolymerization of kraft lignin with poly(ethylene imine) grafting-agent and epichlorohydrin cross-linker. The porous structure of the synthesized adsorbent was formed using a 5.0 wt.% sodium-alginate solution. Additional efficiency in the removal of chrom
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Mingyang Xu, Yao Xie, Yanqiao Jin, and Xiansu Cheng. "Study on synthesis of enzymatic hydrolysis lignin modified amine as an asphalt emulsifier." In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5965533.

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Shi, Lai-Shun, Tian-Yao Wang, Meng Chen, De-Mei Li, and Cun-Fei Ma. "Synthesis of Aminoethylpiperazine/Formaldehyde Modified Lignin Amine Asphalt Emulsifier and Its Investigation by Online FTIR Spectrophotometry." In 4th 2016 International Conference on Material Science and Engineering (ICMSE 2016). Atlantis Press, 2016. http://dx.doi.org/10.2991/icmse-16.2016.23.

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Chen, Meng, Lai-Shun Shi, Fang Tian, Ya-Nan Xing, and Ya-Jun Hui. "Synthesis of triethylenetetraamine/formaldehyde modified lignin amine asphalt emulsifier and its investigation by online FTIR spectrophotometry." In 2016 International Conference on Advanced Materials and Energy Sustainability (AMES2016). WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813220393_0040.

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