Thyllose et perméabilité du bois des chênes français de tonnellerie

Abstract : 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
Document type :
Theses
File URL :
http://docnum.univ-lorraine.fr/prive/DDOC_T_2012_0018_MELLOUKI.pdf
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https://hal.univ-lorraine.fr/tel-01749158
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Submitted on : Thursday, March 29, 2018 - 12:08:07 PM
Last modification on : Friday, March 30, 2018 - 1:32:25 AM

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  • HAL Id : tel-01749158, version 1

Citation

Naoual Mellouki Bendim'Red. Thyllose et perméabilité du bois des chênes français de tonnellerie. Autre. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0018⟩. ⟨tel-01749158⟩

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