ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Special Topics & Reviews in Porous Media: An International Journal
ESCI SJR: 0.259 SNIP: 0.466 CiteScore™: 0.83

ISSN 印刷: 2151-4798
ISSN オンライン: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.v1.i1.30
pages 31-38

STUDY ON THE LONGITUDINAL GAS PERMEABILITY OF JUVENILE WOOD AND MATURE WOOD

Hamid Reza Taghiyari
Wood Science and Technology Department, Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran
Ali-Naghi Karimi
Wood and Paper Science and Technology Department, Faculty of Natural Resources, The University of Tehran, Tehran, Iran
Davoud Parsapajouh
Wood and Paper Science and Technology Department, Faculty of Natural Resources, The University of Tehran, Tehran, Iran
Kambiz Pourtahmasi
Wood and Paper Science and Technology Department, Faculty of Natural Resources, The University of Tehran, Tehran, Iran

要約

The present study is aimed at longitudinal gas permeability measurement of juvenile wood and mature wood of the two most important poplar clones in Iran. Longitudinal gas permeability for juvenile wood of P.deltoides was 1.50 × 10−13, and for its mature wood was 28.18 × 10−13(m3 m−1). As for P.euroamericana, values were 0.16 × 10−13 and 13.74 × 10−13(m3 m−1) for juvenile and mature woods, respectively. The higher extractive content in juvenile wood in comparison with mature wood varies significantly among different clones; the maximum extractive content was measured to be 3.4% in juvenile wood of P.euroamericana, while the minimum (0.3%) was observed in mature wood of P.deltoides. A negative relationship is obvious between gas permeability values and extractive content. Vessel diameter in juvenile woods of both species tends to be lower than mature woods; maximum and minimum vessel diameters were observed in mature wood (67.3 μm) and juvenile wood (54.5 μm) of P.deltoides. Although vessel diameter has a great impact in gas permeability, in the present study no clear relationship was found between them. Therefore, the low permeability in the mature wood of P.euroamericana may be rooted in the intense settlement of extractives in the heartwood.


Articles with similar content:

EXPERIMENTAL AND COMPUTATIONAL CALCULATION OF LONGITUDINAL SPECIFIC AIR PERMEABILITY IN POPULUS DELTOIDES AND POPULUS EUROAMERICANA WOOD
Journal of Porous Media, Vol.19, 2016, issue 11
Alireza Rahbari, Hamid Reza Taghiyari, Javad Kadkhodapour, Sajad Homayoonfar
The Ecology of a Predatory Black Sea Turbellarian
Hydrobiological Journal, Vol.34, 1998, issue 6
V. A. Grintsov, V. V. Murina
COMBUSTION PERFORMANCE OF TRIPLE-BASE PROPELLANTS AFTER HOT WATER IMMERSIONS
International Journal of Energetic Materials and Chemical Propulsion, Vol.13, 2014, issue 2
Ze-Shan Wang, Fu-Yang Zhang, Xin Liao
COMPARATIVE STUDY OF TWIN-FLUID ATOMIZATION USING SONIC OR SUPERSONIC GAS JETS
Atomization and Sprays, Vol.6, 1996, issue 3
Joon Sik Lee, Byung Kyu Park, Kenneth D. Kihm
Increase in the Intensity of the Process of Sulfate Reduction in Bottom Sediments of Water Bodies under the Influence of Anthropic Load
Hydrobiological Journal, Vol.47, 2011, issue 4
Ye. A. Sokolova