Letteratura scientifica selezionata sul tema "Lignin distribution"
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Articoli di riviste sul tema "Lignin distribution"
Ház, Aleš, Michal Jablonský, Igor Šurina, František Kačík, Tatiana Bubeníková e Jaroslav Ďurkovič. "Chemical Composition and Thermal Behavior of Kraft Lignins". Forests 10, n. 6 (3 giugno 2019): 483. http://dx.doi.org/10.3390/f10060483.
Testo completoHuang, Yang, Chenhuan Lai, Shaolong Sun, Qiang Yong, Brian K. Via e Maobing Tu. "Organosolv lignin properties and their effects on enzymatic hydrolysis". BioResources 15, n. 4 (12 ottobre 2020): 8909–24. http://dx.doi.org/10.15376/biores.15.4.8909-8924.
Testo completoDamayanti, Damayanti, Yeni Ria Wulandari e Ho-Shing Wu. "Product Distribution of Chemical Product Using Catalytic Depolymerization of Lignin". Bulletin of Chemical Reaction Engineering & Catalysis 15, n. 2 (22 maggio 2020): 432–53. http://dx.doi.org/10.9767/bcrec.15.2.7249.432-453.
Testo completoThring, Ronald W., Esteban Chornet e Ralph P. Overend. "Fractionation of woodmeal by prehydrolysis and thermal organosolv. Alkaline depolymerization, chemical functionality, and molecular weight distribution of recovered lignins and their fractions". Canadian Journal of Chemistry 71, n. 6 (1 giugno 1993): 779–89. http://dx.doi.org/10.1139/v93-103.
Testo completoEl Mansouri, Nour-Eddine, Qiaolong Yuan e Farong Huang. "Characterization of alkaline lignins for use in phenol-formaldehyde and epoxy resins". BioResources 6, n. 3 (19 maggio 2011): 2647–62. http://dx.doi.org/10.15376/biores.6.3.2647-2662.
Testo completoKoda, Keiichi, Keiichi Koda, Armindo R. Gaspar, Liu Yu, Liu Yu, Liu Yu e Dimitris S. Argyropoulos. "Molecular weight-functional group relations in softwood residual kraft lignins". Holzforschung 59, n. 6 (1 novembre 2005): 612–19. http://dx.doi.org/10.1515/hf.2005.099.
Testo completoDuarte, A. P., D. Robert e D. Lachenal. "Eucalyptus globulus Kraft Pulp Residual Lignin. Part 2. Modification of Residual Lignin Structure in Oxygen Bleaching". Holzforschung 55, n. 6 (6 novembre 2001): 645–51. http://dx.doi.org/10.1515/hf.2001.105.
Testo completoThring, R. W., e S. L. Griffin. "The heterogeneity of two Canadian kraft lignins". Canadian Journal of Chemistry 73, n. 5 (1 maggio 1995): 629–34. http://dx.doi.org/10.1139/v95-081.
Testo completoBergamasco, Sara, Florian Zikeli, Vittorio Vinciguerra, Anatoly Petrovich Sobolev, Luca Scarnati, Giorgio Tofani, Giuseppe Scarascia Mugnozza e Manuela Romagnoli. "Extraction and Characterization of Acidolysis Lignin from Turkey Oak (Quercus cerris L.) and Eucalypt (Eucalyptus camaldulensis Dehnh.) Wood from Population Stands in Italy". Polymers 15, n. 17 (29 agosto 2023): 3591. http://dx.doi.org/10.3390/polym15173591.
Testo completoVallejos, María E., Fernando E. Felissia, Aprigio A. S. Curvelo, Marcia D. Zambon, Luis Ramos e María C. Area. "Chemical and physico-chemical characterization of lignins obtained from ethanol-water fractionation of bagasse". BioResources 6, n. 2 (21 febbraio 2011): 1158–71. http://dx.doi.org/10.15376/biores.6.2.1158-1171.
Testo completoTesi sul tema "Lignin distribution"
Reeves, Alison Dawn. "The distribution and behaviour of lignin in the estuarine environment". Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237510.
Testo completo寶詠恩 e Vivienne Valerie Claire Bucher. "Distribution of lignin-modifying enzymes among aquatic fungi and theirability to degrade lignocellulose substrates". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31243988.
Testo completoAtadana, Frederick Williams. "Catalytic Pyrolysis of Cellulose, Hemicellulose and Lignin Model Compounds". Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/31251.
Testo completoThe effect of HZSM-5 catalyst and NaOH pretreatment on the product distribution and bio oil properties from pyrolysis of cellulose, hemicellulose and lignin model compounds was investigated at 450 °C. NaOH pretreated and untreated cellulose was pyrolyzed on sand and the HZSM-5 catalysts; VPISU001 HZSM-5, BASF HZSM-5, and Sud-Chemie HZSM-5. The pyrolysis of cellulose on BASF and Sud-Chemie HZSM-5 catalysts increased the yields of the organic liquid fraction, total liquid and char while decreasing the gas yields. However the catalyst decreased the organic and char yields while increasing the water yields but there was no change in gas yields. The NaOH treatment caused a decrease in the organic and total oil yields relative to the control but the char yield increased. The change in gas yields was not significant. The characterization of the oils using FTIR and 13Câ nmr showed that, the VPISU001 HZSM-5 with and without NaOH pretreatment caused elimination of the levoglucosan fraction while increasing the aromatic fraction. The NaOH pretreated cellulose pyrolyzed on sand reduced the levoglucosan groups while increasing the aromatic fraction of the bio oil. In the hemicellulose studies, birchwood xylan and NaOH treated xylan samples were pyrolyzed on sand and VPISU001 HZSM-5 catalyst. The organic liquid yields were very low and ranged from 3.3 wt% to 7.2 wt%, the water yields ranged from 17.8-25.7 wt%, the char yield were 17.8-25 wt% and gas yield were 40.9-49.6 wt%. The HZSM-5 catalysts increased the water and gas yields and produced the lowest char yield. NaOH pretreatment produced the lowest water yield while the char yield was the highest. The combined effect of NaOH pretreatment and HZSM-5 produced the lowest organic yield and highest char yield. The FTIR and 13C-nmr analyses of the organic liquids showed that the HZSM-5 catalyst promoted the formation of aromatic products, while the NaOH pretreatment promoted the formation of aliphatic hydrocarbons. The combined effect of NaOH pretreatment and HZSM-5 catalyst seem to promote the formation of anhydrosugars. The main gases evolved were CO, CO2 and low molecular weight hydrocarbons. The HZSM-5 catalyst promoted CO formation while NaOH pretreatment promoted CO2. The HZSM-5 catalyst produced the highest yield of low molecular weight hydrocarbon gases. The lignin and model compounds studies involved using low molecular weight kraft lignin, guaiacol, and syringol which were pyrolyzed on sand and VPISU001 HZSM-5 catalyst at 450 °C. The kraft lignin pyrolysis produced low liquid and gas yields and high char yields. The HZSM-5 catalysts increased the water yield and decreased the organic liquid yield. NaOH pretreatment increased the char yield and decreased the liquid products. NaOH and the HZSM-5 catalyst together decreased the char and increased the gas yields. The 13C-nmr and FTIR analysis showed that NaOH pretreatment promoted the formation of mainly guaiacol while the HZSM-5 catalyst formed different aromatic components. NaOH pretreatment promoted the formation of more CO2 than CO whilst HZSM-5 catalyst promoted the formation of more CO than CO2. Methane formation was enhanced by NaOH pretreatment. Other hydrocarbon gases were however enhanced by the HZSM-5 catalysts. Pyrolysis of the model compounds on the HSZM-5 catalyst showed an increase in pyrolytic water. The HZSM-5 catalyst promoted demethylation in syringol pyrolysis as compared to guaiacol.
Master of Science
Morel, Oriane. "Characterization of the spatial distribution of lignins in plant cell walls using chemical reporters and Raman". Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILS118.
Testo completoLignin is a polyphenolic polymer of the cell wall involved in many aspects of growth and development in higher plants. As a major component of lignocellulosic biomass, it is also of economic interest. Although the biosynthesis of the lignin polymer is relatively well understood, we need to know more about how changes (quantity/structure) to other cell wall polymers (e.g., cellulose, hemicelluloses, pectins) affect lignin production. To provide more information on this question we implemented a two-phase approach based on the use of biological imaging. The first phase involved the development/improvement of different high-resolution complementary imaging techniques. We firstly developed a novel quantitative ratiometric approach (REPRISAL) based on the parametric/artificial intelligence segmentation of confocal microscopy images obtained by lignin chemical reporter bio-orthogonal chemistry. This methodology allowed us to precisely map the lignification capacity of different cell wall layers (cell corner, compound middle lamella and secondary cell wall) in Arabidopsis WT plants and the prx64 mutant. In a second development, we modified the REPRISAL segmentation algorithim thereby enabling it to be used to map relative cell wall lignin levels determined by the ratiometric safranin-O fluorescence technique. Finally, we used Raman imaging to compare the ability of three different multivariate analytical methods (unmixing, cluster analysis and orthogonal matching) to provide detailed spatial information about the distribution of different polymers in plant cell walls. In the second phase we used the developed/improved imaging techniques to analyse whether changes to cell wall hemicelluloses affect lignification in the Arabidopsis irx9 mutant. Our results demonstrated that changes in the distribution of cell wall hemicelluloses do indeed modify the lignification process, particularly in the younger parts of the plant floral stem. Targeted transcriptomics of selected cell wall genes suggested that the observed changes could be related to the induction of a defence response. Overall, the techniques developed within the framework of this thesis should prove valuable for future studies of cell wall dynamics. The results obtained on the irx9 mutant provide a novel insight into the dynamic relationships that exist between different polymers of the plant cell wall
Chedid, Fadia. "Determination of absolute molecular mass distribution and other structural properties of kraft lignin samples : Investigation using SEC in combination with MALDI-TOF-MS and Py-GC/MS". Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-105449.
Testo completoDria, Karl Jay. "Carbon and nitrogen distribution and processes in forest and agricultural ecosystems a study involving solid- and liquid-state NMR and pyrolysis GC/MS /". Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1085700625.
Testo completoTitle from first page of PDF file. Document formatted into pages; contains xv, 214 p.; also includes graphics (some col.). Includes bibliographical references (p. 194-206). Available online via OhioLINK's ETD Center
Sjöberg, John. "Characterization of chemical pulp fiber surfaces with an emphasis on the hemicelluloses". Doctoral thesis, KTH, Fibre and Polymer Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3462.
Testo completoMain, Oscar. "Optimising forage maize's digestible yield under contrasted environments". Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASB019.
Testo completoMaize stands as a pillar of the French forage system, with its yield and silage feeding value serving as key criteria for the registration of maize hybrid varieties in the official French catalogue. Previous research on this topic has revealed a direct correlation between silage feeding value and dry matter (DM) digestibility, which is, in turn, constrained by cell wall (CW) digestibility and significantly affected by water deficit. Studies on maize inbred lines have shown that under severe water deficit conditions, both DM and CW digestibilities increase. This increase correlates with a decrease in lignin content and changes in lignin distribution. However, it is noteworthy that breeding efforts have already fixed lignin content in hybrid varieties. Therefore, lignin content is unlikely to be a source of future digestibility improvement. To explore other CW targets and the impact of water deficit on these traits, this PhD study was conducted as part of the Carnot Plant2Pro INRAE-ARVALIS MAMMA MIA project. We grew a range of modern forage maize hybrids representative of the current S0-S1 (very-early to early flowering earliness) French market for two years under sixteen contrasted environmental conditions, including six in controlled irrigation conditions. First, we established a simple but robust stress index (SID) that considers the water deficit in the soil and the air temperature. This SID provided a key environmental ranking tool, highlighting severe stress due to high temperature that significantly impacted DM digestibility compared to moderate stress conditions. Secondly, to encompass a wide range of environmental conditions in biochemical quantifications, we developed several predictive near-infrared spectroscopy (NIRS) equations capable of robustly and accurately predicting fine cell wall traits and relationships, mirroring levels observed in laboratory experiments. While these equations prove sufficiently robust for use in selection programs, we emphasize the need for vigilance in accurately estimating prediction accuracy under stress conditions, particularly in equations applied to hybrid material where trait variation ranges are often limited. The core dataset of this work enabled a multiscale analysis, integrating agroclimatic, agronomic, biochemical, and histological traits, along with in sacco experimental data on cows. We proposed biochemical and histological traits to improve the quality of forage maize depending on stress intensity. We demonstrated that under severe stress, ear production decreases significantly, but DM digestibility can be maintained by increasing CW digestibility. This boost in CW digestibility was due to a reduction in p-hydroxycinnamic acid content, while lignin content remained stable, as anticipated. The significance of lignin distribution increased with the severity of stress, reaching an extreme threshold where biochemical parameters solely account for digestibility variations. This two-threshold model presents a window of opportunity located at the first threshold between non-stressed and moderately stressed environments, where the increased role of lignin distribution alongside biochemical traits enabled an increase in digestible yield. By controlling irrigation doses in the field under moderate drought conditions and integrating the SID into an irrigation management tool, farmers could exploit this window to increase productivity
Burlat, Vincent. "Étude immunocytochimique de la distribution ultrastructurale des lignines dans la paille de blé et de son influence sur le mode d'action des champignons ligninolytiques : application aux pâtes à papier". Université Joseph Fourier (Grenoble ; 1971-2015), 1997. http://www.theses.fr/1997GRE10100.
Testo completoSiochi, Emilie J. "Dilute solution studies of molecular weight distributions of nitrocellulose, modified lignins and PMMA graft polymers". Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54423.
Testo completoPh. D.
Libri sul tema "Lignin distribution"
Hydro-Québec. Division terminologie et documentation. Vocabulaire illustré des lignes souterraines de transport et de distribution d'électricité. [Montréal]: Hydro-Québec [Information, Édition et production], 1986.
Cerca il testo completoPansini, Anthony J. Electrical distribution engineering. 2a ed. Lilburn, GA: Fairmont Press, 1992.
Cerca il testo completoPansini, Anthony J. Electrical distribution engineering. 3a ed. Boca Raton, FL: CRC Press/Taylor & Francis, 2006.
Cerca il testo completoDirectorate, Canada Drugs. Guidelines for the secure distribution of narcotic and controlled drugs in hospitals =: Lignes directrices sur la distribution sécuritaire des stupéfiants et des drogues contrôlées dans les hôpitaux. Ottawa, Ont: Health and Welfare Canada = Santé et bien-être social Canada, 1990.
Cerca il testo completoQuébec (Province). Bureau d'audiences publiques sur l'environnement. Projet de ligne à 315 kV Grand-Brûlé - Vignan par Hydro-Québec. Québec]: Bureau d'audiences publiques sur l'environnement, 2001.
Cerca il testo completoSlavin, Lawrence M. Overhead Distribution Lines: Design and Applications. Wiley & Sons, Limited, John, 2020.
Cerca il testo completoSlavin, Lawrence M. Overhead Distribution Lines: Design and Applications. Wiley & Sons, Incorporated, John, 2020.
Cerca il testo completoSlavin, Lawrence M. Overhead Distribution Lines: Design and Applications. Wiley & Sons, Limited, John, 2021.
Cerca il testo completoSlavin, Lawrence M. Overhead Distribution Lines: Design and Applications. Wiley & Sons, Incorporated, John, 2020.
Cerca il testo completoPansini, Anthony J. Electrical Distribution Engineering. 3a ed. Fairmont Press, 2006.
Cerca il testo completoCapitoli di libri sul tema "Lignin distribution"
Johnson, D. K., Helena Li Chum e John A. Hyatt. "Molecular Weight Distribution Studies Using Lignin Model Compounds". In ACS Symposium Series, 109–23. Washington, DC: American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0397.ch008.
Testo completoDecou, Raphaël, Henrik Serk, Delphine Ménard e Edouard Pesquet. "Analysis of Lignin Composition and Distribution Using Fluorescence Laser Confocal Microspectroscopy". In Methods in Molecular Biology, 233–47. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-6722-3_17.
Testo completoFroment, P., e F. Pla. "Determinations of Average Molecular Weights and Molecular Weight Distributions of Lignin". In ACS Symposium Series, 134–43. Washington, DC: American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0397.ch010.
Testo completoHimmel, M. E., K. Tatsumoto, K. K. Oh, K. Grohmann, D. K. Johnson e Helena Li Chum. "Molecular Weight Distribution of Aspen Lignins Estimated by Universal Calibration". In ACS Symposium Series, 82–99. Washington, DC: American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0397.ch006.
Testo completoForss, Kaj, Raimo Kokkonen e Pehr-Erik Sågfors. "Determination of the Molar Mass Distribution of Lignins by Gel Permeation Chromatography". In ACS Symposium Series, 124–33. Washington, DC: American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0397.ch009.
Testo completoRadotić, Ksenija, Dragica Spasojević e Danica Zmejkoski. "Lignin-based Materials for Biomedical Applications: Basic Requirements and Properties". In Lignin-based Materials, 85–105. The Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781839167843-00085.
Testo completoHiguchi, Takayoshi. "Lignin Structure and Morphological Distribution in Plant Cell Walls". In Lignin Biodegradation: Microbiology, Chemistry, and Potential Applications, 2–19. CRC Press, 2018. http://dx.doi.org/10.1201/9781351074063-1.
Testo completoVara, Saritha. "Mycoremediation of Lignocelluloses". In Biotechnology, 1086–108. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8903-7.ch042.
Testo completoVara, Saritha. "Mycoremediation of Lignocelluloses". In Handbook of Research on Inventive Bioremediation Techniques, 264–86. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-2325-3.ch011.
Testo completoGurrala, Lakshmiprasad, M. Midhun Kumar e R. Vinu. "Catalytic hydrogenolysis of lignin to phenols: Effect of operating conditions on product distribution". In Biomass, Biofuels, Biochemicals, 83–107. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-820294-4.00001-6.
Testo completoAtti di convegni sul tema "Lignin distribution"
Kovalev, I. V., e N. O. Kovaleva. "Lignin phenols content and distribution in gran-size fractions of soils". In Fifth International Conference of CIS IHSS on Humic Innovative Technologies «Humic substances and living systems». CLUB PRINT ltd., 2019. http://dx.doi.org/10.36291/hit.2019.kovalev.034.
Testo completoMaramokhin, E. V., M. V. Sirotina e A. S. Dyukova. "THE ROLE OF SUBSTRATE FACTOR IN DISTRIBUTION OF CERTAIN XYLOTROPHIC BASIDIOMYCETES IN BIRCH AND ASPEN FORESTS OF KOSTROMA REGION". In SAKHAROV READINGS 2021: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute, 2021. http://dx.doi.org/10.46646/sakh-2021-1-290-294.
Testo completoMaramokhin, E. V., M. V. Sirotina e A. S. Dyukova. "THE ROLE OF SUBSTRATE FACTOR IN DISTRIBUTION OF CERTAIN XYLOTROPHIC BASIDIOMYCETES IN BIRCH AND ASPEN FORESTS OF KOSTROMA REGION". In SAKHAROV READINGS 2021: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute, 2021. http://dx.doi.org/10.46646/sakh-2021-1-290-294.
Testo completoKimura, Minoru, Satoshi Kimura, Zi-Dong Qi, Shigenori Kuga e Akira Isogai. "Porous Structure of Never-Dried Pulp Fibers Analyzed by Nitrogen Adsorption Method". In Advances in Pulp and Paper Research, Cambridge 2013, a cura di S. J. I’ Anson. Fundamental Research Committee (FRC), Manchester, 2013. http://dx.doi.org/10.15376/frc.2013.2.821.
Testo completo"Assessment of Formula-Based Structural Annotation of Humic Substances by Mild Chemical Derivatization and Mass Spectrometry". In Sixth International Conference on Humic Innovative Technologies "Humic Substances and Eco-Adaptive Technologies ”(HIT – 2021). Non-Commercial Partnership "Center for Biogenic Resources "Humus Sapiens" (NP CBR "Humus Sapiens"), 2021. http://dx.doi.org/10.36291/hit.2021.mikhnevich.002.
Testo completoLindström, Tom, Lars Wågberg e Tomas Larsson. "Review: On the Nature of Joint Strength in Paper – A Review of Dry and Wet Strength Resins Used in Paper Manufacturing". In Advances in Paper Science and Technology, a cura di S. J. I’Anson. Fundamental Research Committee (FRC), Manchester, 2005. http://dx.doi.org/10.15376/frc.2005.1.457.
Testo completoBatista, Gabriel F., e Paulo Brito. "RESIDUAL BIOMASS CHARACTERIZATION AND EVALUATION OF ITS INFLUENCE ON PYROLYSIS PROCESSES". In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022v/4.2/s17.72.
Testo completoZhang, Chunhui, Xuwen He, Shuquan Zhu, Xiaochan Wang e Honglei Zhuang. "Distribution, Character and Utilization of Lignite in China". In 2011 Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2011. http://dx.doi.org/10.1109/appeec.2011.5748423.
Testo completoFu, Bi An, Meiqian Chen e Q. H. Li. "LNT microwave-multiphase transport model for the microwave drying of lignite thin layer". In 21st International Drying Symposium. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7683.
Testo completoKonstantinova, D. A., V. P. Gorbatenko e T. V. Ershova. "Spatial distribution of ligtning discharges density on Western Siberia". In 2010 30th International Conference on Lightning Protection (ICLP). IEEE, 2010. http://dx.doi.org/10.1109/iclp.2010.7845826.
Testo completoRapporti di organizzazioni sul tema "Lignin distribution"
Ardakani, O. H. Organic petrography and thermal maturity of the Paskapoo Formation in the Fox Creek area, west-central Alberta. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330296.
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