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Rozprawy doktorskie na temat „Wood structure”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Kultikova, Elena V. "Structure and Properties Relationships of Densified Wood." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/35810.

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The objective of this research was to investigate the effect of applied compressive strain in various environments, on the strength and stiffness of compressed wood samples. It is believed that transverse compression of wood at specific conditions of temperature and moisture will result in improved mechanical properties, which can be attributed to increased density and perhaps other physical or chemical changes. <p> Specimens of both mature and juvenile southern pine (Pinus taeda) and yellow-poplar (Liriodendron tulipifera) were compressed radially at three different temperature, and moisture

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2

Donkor, Ben N. "Stem wood structure of four Ghanaian Khaya species." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0004/MQ33365.pdf.

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Doroudiani, Saeed. "Microcellular wood-fibre thermoplastic composites, processing-structure-properties." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq41016.pdf.

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4

Hsu, Ching Yi. "Radiata pine wood anatomy structure and biophysical properties." Thesis, University of Canterbury. Forestry, 2003. http://hdl.handle.net/10092/7202.

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Several important characteristics such as density, acoustic velocity, modulus of elasticity and tracheid dimensions are examined in stemwood, branchwood and rootwood in young (age 3 and 7) Pinus radiata. Stemwood air-dry density decreases little from ground level to the top of the tree falling gradually from 415 kg/m³ to 405 kg/m³. Branchwood air-dry density is higher than stemwood density. The branchwood density is approximately 480 kg/m³ close to the stem and then decreases sharply to ca. 410 kg/m³ near the branch tips. Rootwood density at 12% moisture content is similar to stemwood densit

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5

Joffre, Thomas. "Structure and Mechanical Behaviour of Wood-Fibre Composites." Doctoral thesis, Uppsala universitet, Tillämpad mekanik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229290.

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Wood fibres have several advantages compared to man-made synthetic fibres: they have high specific stiffness, are renewable, relatively inexpensive, available in industrial quantities and biodegradable. However, to increase and diversify their utilisation, it is necessary to increase the understanding on what controls their mechanical properties. In this work, the hygroelastic behaviour of isolated wood fibres has been investigated using an analytical model and a finite element model based on three dimensional images obtained using synchrotron-based X-ray micro-computed tomography. It was thus

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6

Owens, Elis M. "Fungal community structure and functioning in decomposing wood." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375959.

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7

Feeney, F. "Ultrasonic characterisation of the structure and properties of wood." Thesis, University of Surrey, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300305.

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8

Shi, Jingbo. "Water sorption hysteresis and wood cell wall nanopore structure." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61782.

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The origin of sorption hysteresis in the wood-water system is still under debate. In this study, cell walls are considered as micro-mesoporous materials and capillary condensation in the entire hygroscopic region is proposed as an alternative sorption mechanism. Initially, the pore connectivity was investigated by observing five experimentally generated hysteresis patterns at 25 and 40oC. Consistent patterns were found for the species-temperature combinations. Further, the satisfactory congruency and wiping-out properties indicate the dominance of independent cell wall pores. After this expe

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9

Uhlin, Karen Ingegerd. "The influence of hemicelluloses on the structure of bacterial cellulose." Diss., Available online, Georgia Institute of Technology, 1990:, 1990. http://etd.gatech.edu/theses/available/ipstetd-11/uhlin%5Fki.pdf.

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10

Rotsaert, Frederik A. J. "Structure-function studies on the flavocytochrome cellobiose dehydrogenase from phanerochaete chrysosporium /." Full text open access at:, 2003. http://content.ohsu.edu/u?/etd,18.

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11

Saumure, Raymond A. "Growth, mutilation, and age structure of two populations of wood turtles, Clemmys insculpta, in southern Québec." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq29779.pdf.

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12

Nordin, Lars-Olof. "Wood fiber composites : from processing and structure to mechanical performance." Doctoral thesis, Luleå : Univ, 2004. http://epubl.ltu.se/1402-1544/2004/09/.

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13

Hibberd, Martin Sidney. "The technology and structure of the British wood furniture industry." Thesis, University of Sussex, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323015.

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14

Howell, Caitlin L. "Understanding Wood Biodegradation through the Characterization of Crystalline Cellulose Nanostructures." Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/HowellCL2008.pdf.

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15

Ashaari, Zaidon. "The structure and properties of rattan in relation to treatment with boron preservatives." Thesis, University of Aberdeen, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282681.

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16

Griffith, G. S. "Fungal community structure and development in attached angiosperm twigs." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305126.

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17

Zhou, Yonghui. "Interface optimisation and bonding mechanism of rubber-wood-plastic composites." Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/16095.

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The incorporation of waste tyre rubber into thermoplastics to develop a class of polymer composites with both elastomeric and thermoplastic behaviour has gained a lot of attention and is becoming one of the most straightforward and preferred options to achieve the valorisation of waste tyres. In view of the unique properties rubber possesses and the rapid expansion and versatile application of wood plastic composites (WPC) materials, the inclusion of tyre rubber as raw material into WPC to develop an entirely new generation of WPC, namely rubber-wood-plastic composites (RubWPC), was presumed t

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18

Tank, Jennifer Leah. "Microbial activity on wood in streams : exploring abiotic and biotic factors affecting the structure and function of wood biofilms /." Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-06062008-144954/.

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19

Visscher, George E. "Wood Anatomy of Metasequoia - Separation from Glyptostrobus and Function/Structure Considerations." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/VisscherGH2002.pdf.

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20

Figueroa, Michael. "Dynamic Analysis of a Light Wood-Framed Structure during Fire Conditions." Digital WPI, 2016. https://digitalcommons.wpi.edu/etd-theses/777.

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The purpose of this project is to create a theoretical dynamic analysis model to assess the dynamic response of light, wood-framed structures before and after fire conditions. This information is useful for predicting the damage to structural integrity due to a fire. The mass and stiffness matrices used for the dynamic model are derived from a standard residential building created for an existing project at WPI funded through the DHS/FEMA/USFA Assistance to Firefighters Grant program. The damping matrix is derived via the Rayleigh Damping Method using the mass and stiffness matrices obtained t

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21

Gu, Hongmei. "Structure Based, Two-dimensional, Anisotropic, Transient Heat Conduction model for Wood." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/28938.

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The importance of precise values for the parameters used in heat and mass transfer models has been demonstrated by many research studies. Thermal conductivity values used in previous models are usually empirical and fluctuate. Theoretical analysis and estimations of wood thermal conductivities in the radial and tangential directions were conducted with the geometric models built up from the macro- and micro-structure observations. Theoretically, thermal conductivity in the radial direction is about 1.5 to 2.5 times of the tangential direction for softwood species with moisture content (MC) bel

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22

Maryoko, Hadi. "Earthquake Resisting Timber Structure System Composed of Indonesian Engineered Wood Products." Kyoto University, 2013. http://hdl.handle.net/2433/175087.

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23

Henman, G. S. "'Shake' defects and wood structure variations in British oaks (Quercus spp.)." Thesis, Bangor University, 1991. https://research.bangor.ac.uk/portal/en/theses/shake-defects-and-wood-structure-variations-in-british-oaks-quercus-spp(124e6162-d6f4-4e61-a985-ad5e4edef257).html.

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The overall aim was to gain information required for improvement of wood quality in British oaks (Quercus robur and petraea). Specific aims were 1) to investigate the nature and incidence of shake in British oaks; 2) to quantify variations in oak wood structure and properties, identifying which characteristics are under genetic control and which associated with growth rate; 3) to make prescriptions for selection and silviculture of oak, with a view to improving wood quality in future British crops. Site surveys (including soil analyses) of 42 woodlands were carried out. An index of severity wa

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24

Mandlekar, Neeraj Kumar. "Integration of wood waste to develop multifunctional fully biobased textile structure." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1I062/document.

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Les textiles jouent un rôle important dans notre vie quotidienne. La plupart des fibres textiles et des tissus sont fabriqués à partir de polymères à base de pétrole, des matériaux inflammables et potentiellement dangereux. Afin de conférer le caractère ignifuge aux fibres textiles; entre autres, les composés halogénés sont plus efficaces et largement utilisés pour améliorer le comportement ignifuge des matières textiles. Cependant, en raison de la toxicité des composés halogénés et de l'épuisement progressif des ressources pétrolières, les communautés scientifiques et industrielles sont oblig

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25

Li, Ruonan. "Surface properties and pore structure of superheated steam dried paper." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55414.

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Effects of superheated steam drying were determined for surface properties and pore structure of paper, properties which are important in the end use of paper. Two furnishes were investigated, thermomechanical pulp (TMP) and a TMP/kraft pulp blend. Drying of handsheets under matched conditions in air was used as the basis of comparison.<br>TMP paper dried in superheated steam has a slightly higher surface roughness, by about 0.5 $ mu$m at a roughness around 8 $ mu$m. This difference decreases with drying fluid temperature. It is also reduced by about half after a very light blade coating. Surf

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26

Tsai, K. T. "An investigation into the fatigue behaviour of wood : Laminates for Wind Energy Converter blade design." Thesis, University of Bath, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379572.

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27

Du, Han. "An Extension to Östasiatiska museet ----- transforming from traditional Asian wood structure language." Thesis, KTH, Arkitektur, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-241458.

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There is always a strong character of OKU( which means depth) inside the traditional Japanese wood construction, which fascinating me a lot. My thesis is about study the structure and spatial language and translating traditional language to formulate a space with that quality of depth/ oku.Site is been choose in far east museum in Skeppsholmen, and my the- sis is working on an addition to the original far east museum. As it was ropewalk manufactory early days, long and narrow, it doesn’t have its own identification, that’s why nowadays it’s more like a belonging facility attached to modern mus

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28

Li, Guizhen. "Wood structure and properties of clonal plantlets and seedlings of Pinus radiata." Thesis, University of Canterbury. Plant and Microbial Sciences, 2000. http://hdl.handle.net/10092/5927.

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The ontogeny of vascular cambium and the wood formation in the 8 month-old Pinus radiata have been examined. The results showed that the procambium develops from the subapical meristem parenchyma, which is converted to pro cambial cells by periclinal division about 0.5 mm from the shoot tip. The interfascicular cambium originates from the interfascicular parenchyma, which is also derived from the subapical meristem. Transverse sections show that the interfascicular parenchyma convert to interfascicular cambial cells requires activation by the fascicular cambium. The vascular cambium was establ

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29

Forbes, Craig L. "Competitive strategy and structure in the United States wood household furniture industry." Diss., This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-02052007-081246/.

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30

Gonzalez, Rubio Hector Larsen David R. "Stand structure development effects on wood quality of Melina (Gmelina arborea roxb.)." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6171.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 15, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. David Larsen Vita. Includes bibliographical references.

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31

Jackson, Asti Joy. "Structure of Sound." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/73778.

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This thesis creates a complementarity relationship with the use of timber and concrete as primary structural and accent materials. Key elements of this thesis include (1) The development of a wood latticing system (2) Stairs that posses a strong sculptural language (3) The Lantern, a free standing lobby/box office, clad in wood and glass (4) Circulation towers that accommodate balcony seating. Studies of these elements went through many iterations resulting in over one hundred drawings. Progression of these drawings are directed to the interpretation of building form and the interaction with t

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32

Burgers, Agnès. "Caractérisations physico-mécaniques de bois "sans défauts" pour la conception mécanique : application aux pins de la région méditerranéenne française." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTS014/document.

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L’utilisation des bois pour des usages structuraux en ingénierie mécanique, sous forme de bois massifs ou éléments reconstitués, suppose une bonne connaissance des propriétés des composants bois élémentaires utilisés. Faute de cela, les bois restent exclus du monde moderne de la conception mécanique.En Languedoc-Roussillon, les pins constituent la ressource forestière principale (30 % des bois sur pieds). La valorisation de cette ressource est un enjeu majeur pour l’interprofession de la filière bois. L’objectif de ce travail de thèse est d’examiner la possibilité de prédire les propriétés de

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33

Beatini, Salvatore J. "Using DNA fingerprinting to assess genetic structure of the vernal pool amphibian rana sylvatica." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0428103-153026.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: wood frog; vernal pool conservation; fragmented habitat; Rana sylvatica; DNA fingerprinting. Includes bibliographical references (p. 38-40).

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34

Ljungdahl, Jonas. "Structure and properties of Vasa oak." Licentiate thesis, Stockholm : Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4016.

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35

Filchev, Ivan. "Buckling and geometric nonlinear FE analysis of pitched large-spanroof structure of wood." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-54324.

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An arched structure provides an effective load carrying system for large span structures. When it comes to long span roof structures, timber arches are one of the best solutions from both structural and aesthetical point of view. Glulam arched structures are often designed using slender elements due to economic consideration. Such slender cross-section shape increases the risk of instability. Instability analysis of straight members such as beam and column are explicitly defined in Eurocode. However, for instability of curved members no analytical approach is provided in the code, thus some nu

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36

Schreiner, Linda [Verfasser]. "Characterization of conifer wood regarding its odor-active constituents, their structure-odor relationships, and the influence of wood odors on humans / Linda Schreiner." München : Verlag Dr. Hut, 2020. http://d-nb.info/1220568031/34.

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37

Eriksson, Daniel. "Wood - an anatomical structure in the tree and an engineering material in industry : prediction of material properties in managed Scots pine stands in the forest /." Umeå : Dept. of Forest Ecology and Management, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/200873.pdf.

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38

Aebischer, Danille P. "Basic density and shrinkage of oak in relation to wood structure and cambial age." Thesis, Bangor University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285465.

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39

Bahrani, Babak. "Effects of weathering on performance of intumescent coatings for structure fire protection in the wildland-urban interface." Thesis, The University of North Carolina at Charlotte, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1606131.

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<p> The objective of this study was to investigate the effects of weathering on the performance of intumescent fire-retardant coatings on wooden products. The weathering effects included primary (solar irradiation, moisture, and temperature) and secondary (environmental contaminants) parameters at various time intervals.</p><p> Wildland urban interface (WUI) fires have been an increasing threat to lives and properties. Existing solutions to mitigate the damages caused by WUI fires include protecting the structures from ignition and minimizing the fire spread from one structure to another. Th

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40

Zafra-Camón, Guillermo. "Calculation of global properties of a multi-layered solid wood structure using Finite Element Analysis." Thesis, Uppsala universitet, Tillämpad mekanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-298677.

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Finite Element Method (FEM) is a powerful numerical tool which, combined with the fast development of Computer Science in the lastdecades, had made possible to perform mechanical analysis of a widerange of bodies and boundary conditions. However, the complexity of some cases may turn the calculationprocess too slow and sometimes even unaffordable for most computers. This work aims to simplify an intricate system of layers withdifferent geometries and material properties by approximating itthrough a homogeneous material, with unique mechanical parameters.Besides the Finite Element analysis, a t

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41

Jonsson, Christian. "Detection of annual rings in wood." Thesis, Linköping University, Department of Science and Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15804.

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<p>This report describes an annual line detection algorithm for the WoodEye quality control system. The goal with the algorithm is to find the positions of annual lines on the four surfaces of a board. The purpose is to use this result to find the inner annual ring structure of the board. The work was done using image processing techniques to analyze images collected with WoodEye. The report gives the reader an insight in the requirements of quality control systems in the woodworking industry and the benefits of automated quality control versus manual inspection. The appearance and formation o

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42

Osei, Nana Akwasi. "Large wood in fluvial systems : quantity, structure and landforms, sediment retention, and riparian seed bank development." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8813.

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This thesis investigates the characteristics and impacts of large wood accumulations within river reaches of different size and style. Four reaches were studied: (i) a wide, braided, headwater reach, characterised by dead wood (Tagliamento River, Italy); (ii) a lower gradient, wide, braided reach, characterised by resprouting wood (Tagliamento River, Italy); (iii) a low gradient, single thread reach with a natural supply of dead wood (Highland Water, UK), and (iv) a low gradient, single thread reach that has been restored by felling trees into the river (River Bure, UK). In each reach, quantit

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43

Girardon, Stéphane. "Amélioration des performances mécaniques des assemblages bois sur bois vissés par préparation des interfaces : application à la réalisation d'éléments de structure." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0188/document.

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L'assemblage de planches par technique de collage est utilisé pour réaliser des éléments de structure en bois performants. Le collage permet d'obtenir des rigidités et des résistances d'assemblages excellentes. Cependant, ces produits sont souvent polluants à différents degrés et ne permettent pas de s'adapter à une cadence industrielle de fabrication, notamment à cause des temps de pressage. Le niveau de performance s'effondre lorsque l'assemblage par collage est remplacé par des organes de type tige, tels que des pointes, vis ou tourillons en bois, mais ils confèrent un temps de mise en oeuv

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44

Chowdhury, Sudip. "Advancing characterization techniques for structure-property determination of in-situ lignocelluloses." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/39189.

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The global progression towards sustainable energy, materials and chemicals requires novel and improved analytical tools to understand and optimize lignocellulosic biomass utilization. In an effort to advance lignocellulose characterization, gain insights into biomass processing, and obtain novel perspectives on cell wall ultrastructure, this study utilizes three principal polymer characterization techniques, namely compressive-torsion dynamic mechanical analysis (DMA), deuterium quadrupolar nuclear magnetic resonance (2H NMR) and rheo-infrared spectroscopy. A novel parallel-plate compressive

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45

Ochieng, Judith Auma. "The role of disturbances in mangrove wood formation and forest structure: Effect of large sedimentation events." Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/232475.

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Disturbance can take various forms and are characteristic of any ecosystem including mangroves. When maintained within certain allowable limits, disturbances permits maintenance of a given stable state which is equivalent to resilience hence the ecological status is not compromised. Disturbances may disrupt the natural balance of processes within such ecosystems including changes in sediment budgets and salinity and tidal regimes. As such, it may trigger a series of responses in tree establishment and development. While such responses may be displayed in loss of stability of a forest and may c

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46

Lin, Wing Shan Linda. "Effect of moisture and other volatiles on the cellular structure of plastic/wood-fiber composite foams." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63121.pdf.

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47

Nord, Tomas. "Structure and developments in the solid wood value chain : dominant saw milling strategies and industrialized housing." Licentiate thesis, Luleå, 2005. http://epubl.luth.se/1402-1757/2005/57.

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48

Hult, Eva-Lena. "CP/MAS ¹³C-NMR spectroscopy applied to structure and interaction studies on wood and pulp fibers /." Stockholm, 2001. http://media.lib.kth.se:8080/kthdisseng.html.

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49

Crivellaro, Alan. "Wood, bark and pith structure in trees and shrubs of Cyprus: anatomical descriptions and ecological interpretation." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3422435.

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The dissertation deals with wood, bark and pith anatomy of trees and shrubs of Cyprus. It consist of three parts: (1) the anatomical description of stem wood, twig bark and pith of the endemic and indigenous trees and shrubs species belonging to the flora of the island, (2) the ecological wood and bark anatomies interpretation and (3) a study focused on conductive vs. mechanical tradeoff in climbers vs. subshrubs. Original samples for each species were collected during 3 field trips on Cyprus. About 270 species were collected, and 600 double stained (astra blue and safranin) slides were prepa

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Macias, Diego. "Topological (Bio)Timber: An Algorithm and Data Approach to 3d Printing a Bioplastic and Wood Architecture." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491305462260965.

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