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Статті в журналах з теми "Pièces de bois en chêne":
Loveday, Helen. "LA BIBLIOTHÈQUE TOURNANTE EN CHINE: QUELQUES REMARQUES SUR SON RÔLE ET SON ÉVOLUTION 1." T'oung Pao 86, no. 4 (2000): 225–79. http://dx.doi.org/10.1163/15685320051072726.
Office national des forêts, Direction Commerciale Bois et Services. "Les ventes de bois des forêts publiques en 2019." Revue forestière française 72, no. 1 (February 28, 2020): 55–67. http://dx.doi.org/10.20870/revforfr.2020.5307.
Chatonnet, Pascal, Jean-Noël Boidron, Denis Dubourdieu, and Alexandre Pons. "Evolution des composés polyphénoliques du bois de chêne au cours de son séchage. Premiers résultats." OENO One 28, no. 4 (December 31, 1994): 337. http://dx.doi.org/10.20870/oeno-one.1994.28.4.1135.
JANIN, G., J. F. MAZET, J. L. FLOT, and P. HOFMANN. "Couleur et qualité du bois de chêne de tranchage : Chêne sessile, Chêne pédonculé et Chêne rouge." Revue Forestière Française, no. 2 (1990): 134. http://dx.doi.org/10.4267/2042/26052.
NEPVEU, G. "Les facteurs influençant la qualité du bois de Chêne (Chêne rouvre et Chêne pédonculé)." Revue Forestière Française, no. 2 (1990): 128. http://dx.doi.org/10.4267/2042/26051.
Derbal, Wassila, Abdellatif Zerizer, Jean Gérard, and Daniel Guibal. "CARACTÉRISATION D’ABOUTAGES À ENTURES MULTIPLES POUR TROIS ESSENCES D’ALGÉRIE." BOIS & FORETS DES TROPIQUES 325, no. 325 (July 17, 2015): 59. http://dx.doi.org/10.19182/bft2015.325.a31273.
Marquebielle, Benjamin. "L’industrie en matières osseuses du site du Pas de l’Échelle (Rovon, Isère)." Collection EDYTEM. Cahiers de géographie 20, no. 1 (2018): 109–15. http://dx.doi.org/10.3406/edyte.2018.1410.
Chatonnet, Pascal, Jean-Noël Boidron, and Monique Pons. "Incidence du traitement thermique du bois de chêne sur sa composition chimique. 2e partie : évolution de certains composés en fonction de l'intensité de brûlage." OENO One 23, no. 4 (December 31, 1989): 223. http://dx.doi.org/10.20870/oeno-one.1989.23.4.1722.
Office national des forêts, Direction Commerciale Bois et Services. "Les ventes de bois des forêts publiques en 2022." Revue forestière française 74, no. 3 (September 11, 2023): 381–93. http://dx.doi.org/10.20870/revforfr.2023.7689.
Chatonnet, Pascal, Jean-Noël Boidron, Denis Dubourdieu, and Monique Pons. "Evolution de certains composés volatils du bois de chêne au cours de son séchage premiers résultats." OENO One 28, no. 4 (December 31, 1994): 359. http://dx.doi.org/10.20870/oeno-one.1994.28.4.1720.
Дисертації з теми "Pièces de bois en chêne":
Dahbi, Radouan. "Conception d’une chaîne de traitements pour la segmentation texture d’images multimodales de pièces de bois en chêne. Application à la détection des singularités et la discrimination du grain du bois." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0143.
The work presented in this CIFRE thesis, associating CRAN and CRITT Bois for the ANR-OPTIFIN project, contributes to the development of an image processing chain for the texture segmentation of multimodal images of sawn oak timber pieces. The idea is to combine multimodal acquisition techniques in visible and near-infrared (NIR) range with texture analysis methods using covariance matrices and texture segmentation methods in the Riemannian manifold, for the detection of singularities and discrimination of wood grain. In the first chapter, we present a state of the art on automated inspection of wood pieces; with a special focus on hardwood species (e.g. oak) for which inspection is still an open problem. The second chapter deals with the implementation of the multimodal imagery platform (PIM) and the calibration of color, grayscale, direct and scatter images in the visible range and abundance maps, obtained from NIR hyperspectral images. We propose an original methodology for the scatter images by optimizing the acquisition parameters on sawn oak timber pieces. The third chapter concerns the study of the registration of monomodal and multimodal images and the application of a method for the suppression of their background. In the fourth chapter, we propose a texture analysis methodology based on the fusion of multimodal images and/or their textural images (LBP, nriLBP, GLCM and Gradient) by covariance matrices. We exploit the covariance matrices by K-means clustering andk-ppv supervised classification methods, extended to the Riemannian case, for segmentation. In the last chapter, we present results ensuring a relevant and fast segmentation of the covariance matrices. They are obtained after having determined the best parameters for the K-means setting. The clustering results show that the use of multimodal images alone leads to an optimal segmentation of compact singularities. They also show the importance of integrating textural images in the modality sets to obtain a better segmentation of regional type singularities. For wood grain, an efficient segmentation is obtained by using only textural images. Finally, we propose to apply k-ppv in the Riemannian manifold on the selected modalities to obtain a more accurate segmentation
Deguilloux, Marie-France. "Traçabilité des bois de chêne : méthodes moléculaires et applications." Nancy 1, 2002. http://www.theses.fr/2002NAN10229.
In response to phytosanitary, commercial, legal or ecocertification concerns, numerous actors of the forestry industry are looking for a reliable technique permitting to control wood origin. Ln this study, molecular markers adapted to the analysis of oak wood were developed. The important database on chloroplast DNA variability of European white oaks has allowed to precisely map this variation, which is characterised by a strong geographical structure throughout the European continent. This work is divided in three steps. (i) First, the potential of dry wood for genetic analyses was defined. The DNA isolated from wood is largely degraded and present in low amounts. Genotyping sucess rates increase on fresh sapwood and if targeted sequences are short and present in high copy number per ceIl. (2) Second, molecular methods were developed to characterise wood haplotypes. Five different PCR-RFLP combinations can be used for that purpose. They allow to check statistically the conformity of the haplotypes detected on wood samples with those encountered in the hypothetical region of origin. A new search for polymorphism bas been conducted in order to better distinguish French or European regions. Some new PCR-RFLP combinations allowed to detect additional variation in Franœ, whereas chloroplast microsatellites were designed that could permit the automation of genotyping procedures. Finally, the collection of chloroplast microsatellites variability data allowed us to initiate a study of their evolution. A clear relation between level of variation and microsatellite length has been demonstrated, which should be taken into account in interspecific comparisons. (3) The last study conccrned two different applications of these molecular methods for wood genotyping. The first is an industrial application: the method was adapted to the control the geographical origin of oak wood used to make barrels. The second is in the field of paleogenetics and archaeology: the typing of ancient oak wood allowed to better understand the action of Man on oak populations and the past use of this resource
Nonier, Marie-Françoise. "Recherches sur les macromolécules du bois de chêne de tonnellerieInteractions avec les flavan-3-ols des vins et les aldéhydes du bois de chêne." Bordeaux 1, 2007. http://www.theses.fr/2007BOR13400.
Demanet, Amélie. "Interactions mécaniques eau/bois et application à l'étude du collapse du chêne." Bordeaux 1, 1998. http://www.theses.fr/1998BOR10552.
Slaghenaufi, Davide. "Contribution à la caractérisation des précurseurs d’arôme glycosylés du bois de chêne." Thesis, Bordeaux 2, 2012. http://www.theses.fr/2012BOR21987/document.
The presence of lactic acid bacteria (LAB) in oak barrels induces an increase in wood volatile compounds concentration. This phenomenon could be due to the glycosidic activity of LAB. The glucosidic precursor of a major woody aroma compound (oak lactone) was identified and quantified in oak wood but no data was available concerning the presence of other flavor precursors in oak wood. This study showed that monoglycosidic precursors did not exist in oak, in spirits and in wines. The study was performed by UPLC-FT/MS, using vanillin-β-D-glucopyranoside, vanillin-β-D-xylopyranoside, and coniferaldehyde-β-D-glucopyranoside as standards. These molecules were synthesized by phase transfer reaction. Purification of a vanillin glycoside precursor was done by centrifugal partition chromatography (CPC). The choice of the solvent system was based on an equal distribution in both phases of the aromas released by enzymatic hydrolysis. This led to the determination of the new concept, the activity partition coefficient Kca. After purification and fractionation, vanillin galloylglucoside, trimethoxyphenol-galloylglucoside and macarangioside E were isolated from wood and identified by HPLC-ESI-MS and NMR analysis. These precursors were quantified in different oak species by HPLC-QqQ-MS. These three compounds are precursors of vanillin, 3,4,5-trimethoxyphenol and 3-oxo-α-ionol respectively. The macarangioside E can lead by thermal degradation, to megastigmatrienone and 4-oxo-isophorone which have aromatic notes of tobacco and incense. These compounds are involved in the woody aroma of the wine and the genesis of the bouquet
Masson, Eric. "Incidence du mode de séchage sur les caractéristiques physico-chimiques du bois de chêne de tonnellerie (Quercus petraea (Matt. ) Liebl. )." Nancy 1, 1999. http://www.theses.fr/1999NAN10302.
Assouad, Ahmad. "Modélisation du séchage sous vide discontinu du bois de chêne : intégration d'un critère de qualité mécanique." Bordeaux 1, 2004. http://www.theses.fr/2004BOR12844.
The aim of this work is the improvement of the dried oak wood quality through the definition of the optimal conditions for drying as well from the mechanical point of view as from the point of view of drying duration. The work is based on the development of a model describing heat and mass transfer during the discontinuous vacuum drying coupled with a model describing the stress field. A sensitivity study makes possible to define the optimal parameters for the process control. The optimal conditions obtained are validated through the drying experiments
Barrera, Garcia Veronica Daniela. "Sorption de composés phénoliques du vin par le bois de chêne : approches macroscopique et moléculaires." Dijon, 2007. http://www.theses.fr/2007DIJOS071.
During ageing in oak barrels, wine acquires aromatic complexity as a result of mass transfer at the interface between wood and wine. During the past several years, a variety of studies has related the contribution of wood aroma compounds to wine. Researches concerning the sorption of wine molecules by oak wood have been initiated. However, the mechanisms dictating in the sorption process have not yet been determined. In this work, the transfer of wine phenolic compounds into oak wood under conditions simulating wine ageing were studied used both macroscopic and molecular approaches. Kinetic studies were carried out with the aim of calculating the apparent diffusion coefficients of phenolic compounds in a ternary system containing phenolic compounds, wine, and wood. The thermodynamic study, specifically with the construction of sorption isotherms, showed that the mechanisms and the sorption levels are different according to the chemical structure of the phenolic compound. Phenolic structures with an unsaturated bond on their para substituent showed the highest sorption levels. Among wood macromolecules, only lignin had a selective capacity for sorption for phenolic compounds, indicating the importance of this macromolecule in the sorption process. Molecular analysis, by FTIR and NMR identified the interactions between vinylphenol derivates and lignin, suggesting that this compound is sorbed by a chemisorption mechanism, wherein the vinyl function engages in a polymerization reaction with monolignol units of lignin. Because this work utilized different approaches, it offers a more complete picture of the sorption mechanisms of wine phenolic compounds by oak wood
Frias, de Albuquerque Mariana. "Étude paramétrique d'un procédé d'imprégnation des bois feuillus." Master's thesis, Université Laval, 2021. http://hdl.handle.net/20.500.11794/68633.
Wood is a renewable resource that has been used as a material in appearance products for years. Despite its superior mechanical resistance, different modification processes have been developed to enhance the hardness of wood and make it an even more durable material. Impregnation using monomers is a promising modification method, given its cost and availability. This process is currently being implemented to produce wood polymer composites (WPC), which can have modified and improved physical qualities compared to an untreated wood product. Industrial development is mostly focused on the production of these composites for many applications such as civil construction, furniture, flooring and sports equipment. Currently, monomer impregnation is carried out by the vacuum-pressure method. The amount of chemical that can be obtained by this method is considered to be high; in some cases, up to 200%. The WPCs produced have improved mechanical properties and greater resistance to water impregnation. However, the impregnation process takes about 1 hour, and the wood must be immersed in the liquid (Bethell’s full-cell process). This can be seen as a waste of both material and time in the process. Previous studies have concluded that performing a monomer impregnation on a hardwood surface using a short vacuum period was successful and could reduce these problems. Therefore, it became necessary to find ways to reduce the time and cost of industrial impregnation. The objective of this work was to evaluate the parameters influencing monomers penetrationin tangential surface samples of yellow birch (Betula alleghaniensis Brit.) and red oak (Quercus rubra L.). The factors analyzed were the viscosity of the monomer formulation, surface temperature, vacuum level applied to the process, sample anatomy, and absorption time. After impregnation, the weight gain of the samples was calculated. The penetration depth of the monomer was calculated using density profiles (for yellow birch samples) and the penetration was visualized using X-ray tomography imaging. The results showed that surface temperature did not influence weight gain for any of the species studied. However, the increase in temperature accelerated the polymerization process of monomeric formulations, which may have limited the increase in chemical retention at higher temperatures. Microtomographic images after the temperature study showed that the impregnation was concentrated near the surface of the samples, i.e., there was no deep penetration of monomers. Subjecting the samples to a short vacuum level increased the weight gain of the samples compared to impregnation under atmospheric pressure. The driving force behind the monomer penetration was the pressure difference imposed by the vacuum level, which overcame capillary action. For Yellow birch samples, the variation of vacuum levels did not significantly affect the weight gain results, possibly due to the size of its pores. For red oak, the vacuum level was significant, and the chemical retention increased with pressure differential. Microtomographic scans showed a more controlled and uniform distribution of the monomers. Finally, the absorption time after vacuum relaxation was significant in monomer retention. The contact of both species with the formulations for more than 5 minutes significantly increased monomers intake. X-ray scans showed that for both species, more pores were filled. The depth of penetration did not increase so much for yellow birch but increased for red oak. Thus, it can be said that a longer absorption time allows capillarity to continue filling the empty vessels of the wood until the internal pressure is equal to the external pressure. This research may encourage future work to study the feasibility of reducing vacuum pressure cycles in industrial processes. This method can enable hardening the surface of interest of a wood product in a controlled manner, with reduced costs and avoid wasting of impregnation materials.
Mellouki, Bendim'Red Naoual. "Thyllose et perméabilité du bois des chênes français de tonnellerie." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0018.
The tightness of wood sessile and pedunculate oaks in the longitudinal direction depends on the quantity and quality of tylosis. In recent years, an unusually high rate of leak in barrels made was noted. An experimental study was conducted on two barrels leaking and leakage observed resulted in a fine exploration of the pathways of the colored liquid inside the defective staves. We were able to connect a low tylosis with migration of liquid that can be done along the length of a stave. In addition, a special production of staves was conducted to understand the influence of the height in the tree, the cambial age, watering and curing parameters of staves (time, position in the stack) on the permeability and thyllose. It was necessary to develop a method to quantify the tylosis. Two methods are used: The first observation is based on anatomical and ownership of vessels not blocked or partially blocked by tylosis to let light through. The second is to take measurements of air permeability on cylindrical cut in the longitudinal direction. Infradensity of the samples were also measured. The observations in Scanning Electron Microscopy were used to examine the fine structure of tylosis and the presence of spores and mycelial hyphae. The results are analyzed with a software statistical processing of data. We were able to determine the adverse effect of microbiological growth, especially fungi, the longitudinal permeability and the amount of tylosis timber if too long maturation
Книги з теми "Pièces de bois en chêne":
Jacob, Suzanne. Un dé en bois de chêne: Nouvelles. Montréal: Boréal, 2010.
Drainville, Louis. Évaluation du potentiel d'exploitation des ressources forestières non traditionnelles: Pièces de bois aux formes utilitaires et décoratives, spores de lycopodes, feuilles de thé et gomme d'épinette, projet no 1109. Sainte-Foy, Qué: Service canadien des forêts, Région du Québec, 1996.
Rose, A. H. Insects of eastern hardwood trees. Ottawa: Canadian Forest Service, 1997.
Rose, A. H. Insectes des feuillus de l'est du Canada. Ottawa, Ont: Service canadien des forêts, 1997.
Donaldson, Julia, Axel Scheffler, and Anne Krief. Monsieur Bout-de-Bois: Le livre puzzle avec 6 puzzles de 12 pièces. GALLIMARD JEUNE, 2010.
Donaldson, Julia, Axel Scheffler, and Anne Krief. Monsieur Bout-de-Bois: Le livre puzzle avec 6 puzzles de 12 pièces. GALLIMARD JEUNE, 2010.
Donaldson, Julia, Axel Scheffler, and Anne Krief. Monsieur Bout-de-Bois: Le livre puzzle avec 6 puzzles de 12 pièces. GALLIMARD JEUNE, 2010.
Beowulf. Du Transport, de la Conservation et de la Force des Bois, Ou l'on Trouvera des Moyens d'attendrir les Bois, de Leur Donner Diverses Courbures, Surtout Pour la Construction des Vaisseaux: Et de Former des Pièces d'assemblage Pour Suppéler Au défaut D... Creative Media Partners, LLC, 2018.
Частини книг з теми "Pièces de bois en chêne":
López, Laurent. "« Voici les faits qui nous ont paru suffisants pour motiver son arrestation » : les juges à la poursuite du « vampire du Bois-du-Chêne » (Côte-d’Or, 1895)." In L'arrestation, 233–49. Presses universitaires de Rennes, 2015. http://dx.doi.org/10.4000/books.pur.90484.