• Title/Summary/Keyword: Journal of the Korean Wood Science and Technology

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Determination of the Boundary between Juvenile-Mature Wood of Diospyros kaki and Their Wood Anatomical Variations

  • Eka KARTIKAWATI;BIENITTA;Fanany Wuri PRASTIWI;Widyanto Dwi NUGROHO
    • Journal of the Korean Wood Science and Technology
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    • v.52 no.2
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    • pp.191-203
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    • 2024

  • Persimmon wood (Diospyros kaki) is a seasonal fruit-producing plant with a beautiful dark pattern in its wood that is suitable for high-quality furniture, sculptures and musical instruments. The utilization of persimmon wood can be improved by determining its anatomical characteristics, such as juvenile and mature wood. This study aimed to determine the boundaries between juvenile and mature wood and observe the anatomical properties of juvenile and mature wood and their variations in the axial direction. Three 30-year-old persimmon (D. kaki) trees grown in Karo, North Sumatra, Indonesia, were used in this study. The boundary between juvenile and mature wood was determined by measuring the fiber length and vessel element length from near the pith to near the bark. Anatomical observations were conducted in the juvenile and mature wood areas. The results showed that the average boundaries between juvenile and mature wood were 44.11 mm from the pith and were not significantly different in the axial direction of the trees. Furthermore, the wood anatomy categories of juvenile and mature wood differed significantly in terms of fiber diameter, fiber proportion, vessel proportion, and axial parenchyma proportion. In the axial direction, vessel diameter, ray parenchyma frequency, and ray parenchyma proportion at the base, middle, and top of the tree were significantly different.

  • https://doi.org/10.5658/WOOD.2024.52.2.191 인용 PDF

Feasibility of Value-added Utilization of Ash Trees Infested with Emerald Ash Borer

  • Kim, Jae-Woo;Matuana, Laurent M.
    • Journal of the Korean Wood Science and Technology
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    • v.34 no.5
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    • pp.79-87
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    • 2006

  • Value-added utilization of the disposed ash trees due to the infestation by Emerald Ash Borer (EAB) was explored by converting them into particleboards (PBs) and wood-plastic composites (WPCs). The experimental result showed that PB panels could be successfully manufactured from the ash wood but compaction ratio need to be higher than 1.3 in order to meet the standard requirements listed by American National Standards Institute (ANSI). Ash wood plastic composites with high density polyethylene (HDPE) and polypropylene (PP) were also prepared with additives by extrusion. Physical and mechanical properties of ash wood plastic composite compared favorably to those made of pine and maple.

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Abrasive-Assisted High Energy Water-Jet Machining Characteristics of Solid Wood

  • Lee, Hyoung-Woo
    • Journal of the Korean Wood Science and Technology
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    • v.32 no.3
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    • pp.1-7
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    • 2004

  • The application of abrasive-assisted high energy water-jet was investigated as a possible new method of cutting wood. In this study the maximum cutting speeds for species of various wood density were determined and water-jet machining characteristics were investigated for sixteen Korean domestic species. The maximum cutting speed ranged from 200 to 750 mm/min. The results indicate that wood density affects machining characteristics such as maximum cutting speed, surface roughness, and kerf width. Roughness of surface generated increased and kerf width decreased as penetration depth increased.

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