Academic literature on the topic 'Photochemical degradation of lignin'

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Journal articles on the topic "Photochemical degradation of lignin"

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Awungacha Lekelefac, Colin, Nadine Busse, Michael Herrenbauer, and Peter Czermak. "Photocatalytic Based Degradation Processes of Lignin Derivatives." International Journal of Photoenergy 2015 (2015): 1–18. http://dx.doi.org/10.1155/2015/137634.

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Photocatalysis, belonging to the advanced oxidation processes (AOPs), is a potential new transformation technology for lignin derivatives to value added products (e.g., phenol, benzene, toluene, and xylene). Moreover, lignin represents the only viable source to produce aromatic compounds as fossil fuel alternative. This review covers recent advancement made in the photochemical transformation of industrial lignins. It starts with the photochemical reaction principle followed by results obtained by varying process parameters. In this context, influences of photocatalysts, metal ions, additives,
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Huang, Y., D. Pagé, D. D. M. Wayner, and P. Mulder. "Radical-induced degradation of a lignin model compound. Decomposition of 1-phenyl-2-phenoxyethanol." Canadian Journal of Chemistry 73, no. 11 (1995): 2079–85. http://dx.doi.org/10.1139/v95-256.

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Reaction of 1-phenyl-2-phenoxyethanol (1) with thermally or photochemically generated tert-butoxyl radicals leads, via the intermediate ketyl radical, to the formation of the corresponding ketone, α-phenoxyacetophenone (4), as the only product at low conversion under an inert atmosphere. An approximately twofold increase in the product yield is observed when the reactions are carried out under oxygen. Under the photochemical conditions it is shown that 4 is the primary product and that acetophenone and phenol are formed as a result of secondary photolysis of 4. These data suggest that the rate
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Nguyen, John D., Bryan S. Matsuura, and Corey R. J. Stephenson. "A Photochemical Strategy for Lignin Degradation at Room Temperature." Journal of the American Chemical Society 136, no. 4 (2014): 1218–21. http://dx.doi.org/10.1021/ja4113462.

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Pandey, Krishna K., and Tapani Vuorinen. "UV resonance Raman spectroscopic study of photodegradation of hardwood and softwood lignins by UV laser." Holzforschung 62, no. 2 (2008): 183–88. http://dx.doi.org/10.1515/hf.2008.046.

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Abstract The effect of laser irradiation (Ar+ ion laser, 244 nm) on photodegradation of lignin in silver birch and rubberwood as hardwoods and spruce and chir pine as softwoods has been investigated by UV resonance Raman spectroscopy (UVRRS). UVRR spectra showed degradation of aromatic structures accompanied by the formation of both ortho- and para-quinone structures as a result of photodegradation of wood surfaces. There was a rapid decrease in the intensities of all the lignin-associated bands accompanied by broadening of aromatic bands at 1602 cm-1 and in the region of 1500–1000 cm-1 due to
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Nguyen, John D., Bryan S. Matsuura, and Corey R. J. Stephenson. "ChemInform Abstract: A Photochemical Strategy for Lignin Degradation at Room Temperature." ChemInform 45, no. 34 (2014): no. http://dx.doi.org/10.1002/chin.201434032.

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Yu, Hai-xia, Xin Pan, Man-ping Xu, Wei-ming Yang, Jin Wang, and Xiao-wei Zhuang. "Surface chemical changes analysis of UV-light irradiated Moso bamboo ( Phyllostachys pubescens Mazel)." Royal Society Open Science 5, no. 6 (2018): 180110. http://dx.doi.org/10.1098/rsos.180110.

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Photodegradation is one of the key factors that affect bamboo material application in the exterior environment. Photo radiation will cause chemical degradation, discoloration and cracks on the bamboo surface, thus resulting in weakened strength. The study imitated the accelerated weathering effect of Moso bamboo in sunlight by using UV 313 light. Results showed that after UV irradiation, lignin content decreased sharply. Lignin degradation products are commonly rich in double bonds conjugated with benzene rings; they absorb UV light and shift surface spectral absorbency from the visible to the
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Kang, Ying, Xingmei Lu, Guangjin Zhang, et al. "Metal‐Free Photochemical Degradation of Lignin‐Derived Aryl Ethers and Lignin by Autologous Radicals through Ionic Liquid Induction." ChemSusChem 12, no. 17 (2019): 4005–13. http://dx.doi.org/10.1002/cssc.201901796.

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Silva, M. F., E. A. G. Pineda, A. A. W. Hechenleitner, D. M. Fernandes, M. K. Lima, and P. R. S. Bittencourt. "Characterization of poly(vinyl acetate)/sugar cane bagasse lignin blends and their photochemical degradation." Journal of Thermal Analysis and Calorimetry 106, no. 2 (2011): 407–13. http://dx.doi.org/10.1007/s10973-011-1475-z.

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Potthast, Antje, Sonja Schiehser, Thomas Rosenau, Herbert Sixta, and Paul Kosma. "Effect of UV radiation on the carbonyl distribution in different pulps." Holzforschung 58, no. 6 (2004): 597–602. http://dx.doi.org/10.1515/hf.2004.113.

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Abstract The effect of UV irradiation on unbleached and TCF-bleached dissolving pulp samples of different provenience, a beech sulphite and an eucalyptus prehydrolysis kraft pulp, has been analyzed according to the CCOA method, evaluating the changes in the molecular weight distribution, the total number of carbonyl groups and the carbonyl group profiles of each pulp. In the case of TCF bleached material, slightly more carbonyl groups were introduced into the kraft pulp as compared to the sulfite pulp. Cellulose degradation was relatively low in both pulps. In the case of unbleached sulfite pu
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Argyropoulos, Dimitris S., and Yujun Sun. "Photochemically Induced Solid-State Degradation, Condensation, and Rearrangement Reactions in Lignin Model Compounds and Milled Wood Lignin." Photochemistry and Photobiology 64, no. 3 (1996): 510–17. http://dx.doi.org/10.1111/j.1751-1097.1996.tb03098.x.

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Dissertations / Theses on the topic "Photochemical degradation of lignin"

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Ji, Xiaoyue. "Photochemical transformations of lignin models." Thesis, Queen's University Belfast, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.679240.

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The main aim of this project was to investigate the photochemical degradation pathways of lignin models using singlet oxygen and other photo-induced reactive species, in order to understand the photochemical transformations of the lignin polymer and other lignin-like polymers. The sensitized photolytic oxidation of lignin models containing the 13-0-4' lignin substructures using visible light, Rose Bengal and oxygen was studied in an attempt to understand and develop photocatalytic oxidation as a method for the conversion of lignin into added-value chemicals, Initial studies using a simple mode
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Betts, Walter B. "Microbial degradation of lignin and lignin related aromatic compounds." Thesis, Loughborough University, 1987. https://dspace.lboro.ac.uk/2134/12210.

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Pedlar, Louise. "The microbial degradation of lignin." Thesis, University of York, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333707.

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Ayixiamuguli, Nueraimaiti. "Lignin degradation using lignolytic enzymes." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/35262/.

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Lignin is the only plant biomass that contains aromatic groups in its structure and can provide a wide range of low molecular weight aromatic chemicals if its depolymerisation can be achieved successfully. Currently, lignin is mainly produced as a waste by-product by the paper and pulp industry and biorefineries. Therefore, the transformation of the phenolic-rich lignin into value added aromatic platform chemicals can be regarded of primary concern to improve the economic profitability of biorefining. Moreover, being a renewable resource, the consumption of fossil fuels will be reduced if lign
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Cui, Futong. "Biomimetic studies related to lignin degradation." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30993.

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Lignin is the second most abundant biopolymer on Earth. It is an amorphous, cross-linked, aromatic polymer composed of phenylpropanoid units. There has been an ever growing interest in the biodegradation of this complex polymer for the last 30 years. White-rot fungi have been found to be an important lignin degraders in the natural environment. With the discovery of two groups of hemoprotein enzymes, lignin peroxidases and manganese(II)-dependent peroxidases, from the lignin degrading culture of a white-rot fungus, Phanerochaete chrysosporium, rapid progress has been made in understanding the
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Warner, Stephanie D. "Photochemical degradation of selected polycyclic aromatic compounds." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84446.

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Polycyclic aromatic hydrocarbons and many of their derivatives are considered to be ubiquitous environmental pollutants, which often exhibit mutagenic and/or carcinogenic activity. In the atmosphere, photolysis is generally considered to be the dominant degradation pathway for these pollutants. The photochemical behaviours of benzo(a)pyrene, benzo(b)fluoranthene and benzo(k)fluoranthene have been examined in the laboratory. This study was complemented by an analysis of ambient air samples collected in the vicinity of a Horizontal Stud Soderberg aluminum smelter in Beauharnois, Quebec. B
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Du, C. "Bioconversion of lignin degradation products into value-added chemicals." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1425468/.

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Lignin is an essential component of the cell wall of various types of plants and represents an abundant and renewable natural resource. Both thermo-chemical and biological pre-treatment can be applied to break down the strong ether bonds and phenylpropanoid polymer subunits present in lignin. These liberate a range of phenolic compounds which represent potential substrates for bioconversion by ω-transaminases (ω-TAm). In this work the utility of the CV2025 ω-TAm from Chromobacterium violaceum DSM30191 is explored for selective amination of lignin breakdown intermediates into value-added produc
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Azman, Hazeeq. "Bioligninolysis : degradation of ionic liquid derived lignin by Rhodococcus." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/44278.

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There has been much recent interest in using ionic liquids for processing lignocellulosic biomass. While cellulose has an acknowledged application in generating biofuels, it would be valuable to use the abundant lignin present as well. Rhodococcus has been reported previously to degrade lignin. Therefore, it is attractive to consider a scheme in which an ionic liquid is also used to enhance the microbial breakdown of lignin (bioligninolysis). By using vanillic acid as model compound (Chapter 3), results showed that Rhodococcus UKMP-5M is able to degrade vanillic acid as a sole carbon source at
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Tsujiyama, Sho-ichi. "Degradation of Lignin-Carbohydrate Complex by Wood-rotting Fungi." Kyoto University, 1995. http://hdl.handle.net/2433/187157.

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本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである.<br>Biodegradation, vol.1(2-3), pp.163-176, 1990, doi:10.1007/BF00058834.<br>Kyoto University (京都大学)<br>0048<br>新制・論文博士<br>博士(農学)<br>乙第8800号<br>論農博第1963号<br>新制||農||694(附属図書館)<br>学位論文||H7||N2776(農学部図書室)<br>UT51-95-B265<br>京都大学大学院工学研究科<br>(主査)教授 岡村 圭造, 教授 島田 幹夫, 教授 桑原 正章<br>学位規則第4条第2項該当
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Miroshnikova, Olga. "The Effect of Temperature on Lignin Degradation in Municipal Solid Waste." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/44891.

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Paper and paperboard are the major constituents found in US landfills. Typically paper consists of 79% to 98% of lignocellulose which is considered to be the most abundant source of natural carbon on earth. Lignocellulose decomposition depends on the association of biodegradable cellulose and hemicellulose with lignin. Lignin is a recalcitrant material which hinders cellulose degradation in conventional landfills. Because of this property of lignin cellulose to lignin ratio (C/L) is a common landfill stabilization parameter. Refuse degradation in landfills is a microbiological process and is h
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Books on the topic "Photochemical degradation of lignin"

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Kirk, T. Kent. Enzymatic "combustion": The microbial degradation of ligninp1s,p2s. Forest Products Laboratory, 1987.

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Kirk, T. Kent. Enzymatic combustion: The degradation of lignin by white-rot fungi. Forest Products Laboratory, 1987.

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Bratu, Catalina. Control of oxygen delignification by monitoring carbohydrate and lignin degradation products. National Library of Canada = Bibliothèque nationale du Canada, 1991.

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Etienne, Odier, and Institut national de la recherche agronomique (France), eds. Lignin enzymic and microbial degradation. Institut national de la recherche agronomique, 1987.

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Lewis, Otjen, and United States Forest Service, eds. Assessment of 30 white rot basidiomycetes for selective lignin degradation. Forest Service, 1987.

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Lewis, Otjen, and United States Forest Service, eds. Assessment of 30 white rot basidiomycetes for selective lignin degradation. Forest Service, 1987.

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Lewis, Otjen, and United States Forest Service, eds. Assessment of 30 white rot basidiomycetes for selective lignin degradation. Forest Service, 1987.

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Kirchman, David L. Degradation of organic matter. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198789406.003.0007.

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The aerobic oxidation of organic material by microbes is the focus of this chapter. Microbes account for about 50% of primary production in the biosphere, but they probably account for more than 50% of organic material oxidization and respiration (oxygen use). The traditional role of microbes is to degrade organic material and to release plant nutrients such as phosphate and ammonium as well as carbon dioxide. Microbes are responsible for more than half of soil respiration, while size fractionation experiments show that bacteria are also responsible for about half of respiration in aquatic hab
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Book chapters on the topic "Photochemical degradation of lignin"

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Ahuja, Vishal, and Raya Roy. "Lignin Synthesis and Degradation." In Lignin. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40663-9_3.

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Sarkanen, Simo. "Enzymatic Lignin Degradation." In ACS Symposium Series. American Chemical Society, 1991. http://dx.doi.org/10.1021/bk-1991-0460.ch020.

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Kuwahara, M. "Measuring Lignin Degradation." In Plant Fibers. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83349-6_10.

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Orth, A. B., and M. Tien. "Biotechnology of Lignin Degradation." In Genetics and Biotechnology. Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-662-10364-7_17.

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Evans, C. S. "Enzymes of Lignin Degradation." In Biodegradation. Springer London, 1991. http://dx.doi.org/10.1007/978-1-4471-3470-1_9.

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Umezawa, Toshiaki, and Takayoshi Higuchi. "Chemistry of Lignin Degradation by Lignin Peroxidases." In ACS Symposium Series. American Chemical Society, 1991. http://dx.doi.org/10.1021/bk-1991-0460.ch019.

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Gellerstedt, G. "Chemical Degradation Methods: Permanganate Oxidation." In Methods in Lignin Chemistry. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-74065-7_22.

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Jeffries, Thomas W. "Biodegradation of lignin and hemicelluloses." In Biochemistry of microbial degradation. Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1687-9_8.

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Cui, Futong, and David Dolphin. "Biomimetic Studies in Lignin Degradation." In ACS Symposium Series. American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0399.ch037.

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Vidal, P. F., J. Bouchard, R. P. Overend, E. Chornet, H. Giroux, and F. Lamy. "Bacterial Degradation of Kraft Lignin." In ACS Symposium Series. American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0399.ch038.

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Conference papers on the topic "Photochemical degradation of lignin"

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Copca Granados, Abigail. "PREDICTIVE LIGNIN DEGRADATION STATISTICAL MODEL." In MOL2NET 2018, International Conference on Multidisciplinary Sciences, 4th edition. MDPI, 2018. http://dx.doi.org/10.3390/mol2net-04-05511.

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Li, Yan, Xiao-Hui Wang, Qi Liu, Shou-Juan Wang, and Fan-Gong Kong. "Electrochemical degradation of industrial alkali lignin." In 2015 6th International Conference on Manufacturing Science and Engineering. Atlantis Press, 2015. http://dx.doi.org/10.2991/icmse-15.2015.317.

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Liang, Jiaqi. "The degradation of wheat straw lignin." In 11TH ASIAN CONFERENCE ON CHEMICAL SENSORS: (ACCS2015). Author(s), 2017. http://dx.doi.org/10.1063/1.4977272.

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Mihailescu, Razvan, Petruta Oancea, and Adina Raducan. "PHOTOCHEMICAL DEGRADATION OF 5-FLUOROURACIL." In International Symposium "The Environment and the Industry". National Research and Development Institute for Industrial Ecology, 2018. http://dx.doi.org/10.21698/simi.2018.ab13.

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Chen, Liang, and Shiping Jiang. "Degradation of Lignin in Aqueous Solution by Ultrasonic Radiation." In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5162577.

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Wang, Luling, David Tuschel, and Sanford A. Asher. "229 nm UV photochemical degradation of energetic molecules." In SPIE Defense, Security, and Sensing. SPIE, 2011. http://dx.doi.org/10.1117/12.887061.

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Müller, Daniele G., Maria C. S. Bulhosa, Evelyn C. C. Schenque, et al. "PHOTOCHEMICAL APPROACH AS A STRATEGY TO RECYCLE RICE HUSK LIGNIN AND POST-CONSUMER POLYSTYRENE." In Brazilian Conference on Composite Materials. Pontifícia Universidade Católica do Rio de Janeiro, 2018. http://dx.doi.org/10.21452/bccm4.2018.10.08.

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Chen, Yunping, Renjin Gao, and Ting Chen. "Oxidation degradation of enzymatic hydrolysis lignin by tungstophosphoric acid catalysis." In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5965967.

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Nandanwar, R. A., A. R. Chaudhari, J. D. Ekhe, and A. C. Haldar. "Thermocatalytic degradation of industrial waste lignin to prepare activated carbon." In INTERNATIONAL CONFERENCE ON “MULTIDIMENSIONAL ROLE OF BASIC SCIENCE IN ADVANCED TECHNOLOGY” ICMBAT 2018. Author(s), 2019. http://dx.doi.org/10.1063/1.5100393.

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Lepeytre, C., C. Lavaud, and G. Serve. "Photocatalytic and Photochemical Degradation of Liquid Waste Containing EDTA." In ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2011. http://dx.doi.org/10.1115/icem2011-59144.

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The decontamination factor of liquid waste containing 60Co is generally weak. This is due to the presence of complexant molecules. For instance, complexation of EDTA with 60Co decreases efficiency of radioactive waste treatment. The aim of this study was to degrade EDTA in H2O and CO2 and to concentrate free 60Co in order to increase decontamination factor. A first test of radioactive waste treatment by photocatalysis was allowed to increase decontamination factor (60Co) from 16 to 196 with a device requiring to be improved. The present work concerns the first step of the degradation process d
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Reports on the topic "Photochemical degradation of lignin"

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Dilworth, G. L. Biochemical genetics of Lignin degradation. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/471447.

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Crawford, D. L. Genetics and chemistry of lignin degradation by Streptomyces. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/6643947.

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SUllivan, B. P., Daniel A. Buttry, and Patricia J. Colberg. Photochemical and Biological Degradation of Quadracyclane, Dinitramide and Perfluoropolyethers. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada330703.

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Crawford, D. L. Genetics and chemistry of lignin degradation by Streptomyces. Final technical report. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/10140506.

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Tien, Ming. IMAGING LIGNIN DEGRADATION: BIO-PROSPECTING FOR NEW ENZYMES FOR USE IN BIOFUEL PRODUCTION. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1506469.

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Sonnenberg, A. M., Johan J. P. Baars, M. H. M. Visser, B. Lavrijssen, J. W. Cone, and P. M. Hendrickx. Evaluation of shiitake strains (Lentinula edodes) on selective lignin degradation in Miscanthus x giganteus. Wageningen UR, Plant Breeding, 2016. http://dx.doi.org/10.18174/401882.

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Sonnenberg, A. S. M., M. H. M. Visser, B. Lavrijssen, J. W. Cone, and P. M. Hendrickx. Evaluation of king oyster mushroom strains (Pleurotus eryngii) on selective lignin degradation in wheat straw: An update. Wageningen UR, 2016. http://dx.doi.org/10.18174/401881.

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Moran, Mary A., R. G. Zepp, W. S. Sheldon, and D. Koopmans. Effects of Biological and Photochemical Degradation on the Optical Properties of CDOM Exported to Coastal Marine Environments. Defense Technical Information Center, 2004. http://dx.doi.org/10.21236/ada423173.

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Asenath-Smith, Emily, Emma Ambrogi, Lee Moores, Stephen Newman, and Jonathon Brame. Leveraging chemical actinometry and optical radiometry to reduce uncertainty in photochemical research. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42080.

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Subtle aspects of illumination sources and their characterization methods can introduce significant uncertainty into the data gathered from light-activated experiments, limiting their reproducibility and technology transition. Degradation kinetics of methyl orange (MO) and carbamazepine (CM) under illumination with TiO₂ were used as a case study for investigating the role of incident photon flux on photocatalytic degradation rates. Valerophenone and ferrioxalate actinometry were paired with optical radiometry in three different illumination systems: xenon arc (XE), tungsten halogen (W-H), and
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Adriaanse, P. I., J. J. T. I. Boesten, M. M. S. ter Horst, C. M. J. Jacobs, and C. van Griethuysen. Estimation of photochemical degradation rates of pesticides in outdoor cosm water : Guidance for inclusion in higher tier exposure assessments of the registration procedure in The Netherlands or at EU level, using the TOXSWA model. Wageningen Environmental Research, 2021. http://dx.doi.org/10.18174/523476.

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