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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Wood Science and Technology
Journal Basic Information
Journal DOI :
The Korean Society of Wood Science Technology
Editor in Chief :
Volume & Issues
Volume 36, Issue 6 - Nov 2008
Volume 36, Issue 5 - Sep 2008
Volume 36, Issue 3 - May 2008
Volume 36, Issue 2 - Apr 2008
Volume 36, Issue 4 - Apr 2008
Volume 36, Issue 1 - Jan 2008
Selecting the target year
Species Identification of Wooden Members in the Youngsanjeon Hall of Sucknamsa Temple
Park, Won-Kyu ; Jeong, Hyun-Min ; Kim, Sang-Kyu ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 1~11
The purpose of this study is to examine the species of wooden members used in the Youngsanjeon Hall of the Sucknamsa temple in Anseong, Korea. Ninety-five wood samples from pillars, head-penetrating ties, beams, corner rafter, rafter, floor board and other wood members 攀*1접수 2007년 7월 10일, 채택 2007년 10월 14일*2충북대학교 산림과학부 School of Forest Resources, Chungbuk National University, Cheongju 361-763
Variation of Fine Structure of Wood Cellulose within Stems of 3 Commercial Softwood Species Grown in Korea
Eun, Dong-Jin ; Kwon, Sung-Min ; Kim, Nam-Hun ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 12~20
Radial and vertical variations of relative crystallinity and crystallite width of cellulose within stems of three softwoods (Pinus densiflora S. et Z., P. koraiensis S. et Z, P. rigida Mill.) grown in Korea were examined by an X-ray diffraction method. The mean of relative crystallinity was 61.7% in P. koraiensis, 60.6% in P. densiflora and 49.4% in P. rigida. The degree of crystallinity in earlywood and latewood increased with the age from pith to about 10∼15 years, and then remained almost constant value. The relative crystallinitiy of latewood was slightly higher than that of earlywood. The relative crystallinity in P. densiflora was a little lower at the base of stem, but no significant difference by height was shown in P. koraiensis and P. rigida. The crystallite widths in the stems were 2.8 to 3.0 nm, but were not significantly different in earlywood and latewood by height. In conclusion, the relative crystallinity appeared to be a useful index for separating juvenile wood from adult wood in the softwoods of P. densiflora, P. koraiensis, and P. rigida grown in Korea.
Evaluation on Termite Damage of the Traditional Wooden Building by Non-destructive Methods
Son, Dong-Won ; Lee, Dong-heub ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 21~29
The deterioration of Korean traditional wooden house located in seoul was estimated. This house was attacked by termite. To estimate damage status of buildings, non-destructive methods were applied. Some of the post needed to be replaced due to low strength, estimated by nondestructive methods. The house was installed with boiler heating facility, to use office and public education. This kind of heating system changed the environmental condition of the wooden house. The termite which attacked the house was classified as Reticulitermes speratus. Because of durability of wooden house effected by environment, control of the environmental condition is essential for maintaining the wooden house. The installation of modern facility to traditional wooden house should not change the traditional structure and do not effect to durability of wooden house.
Variation of Material Properties of Fire-killed Timber － Impact of Time on Degradation of Mechanical Properties －
Park, Jung-Hwan ; Park, Byung-Soo ; Kim, Kwang-Mo ; Lee, Do-Sik ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 30~35
Degradation of mechanical properties of fire-killed Korean red pine has been investigated after death in 5 years period. Impact bending absorbed energy was the most sensitive property by elapsed time after forest fire. It is an indication of incipient decay of the wood and can be useful indicator to monitor any change of mechanical property of fire-killed tree after death. Degradation of mechanical properties was more pronounced in sapwood than heartwood. Impact bending absorbed energy was more reduced than any other properties in both sapwood and heartwood, while compressive strength was least impacted by elapsed time after forest fire. It is recommended that the fire-killed Korean red pine can be harvested in one year after the fire for industrial uses by considering decay and consequent changes of mechanical properties.
Wood Quality and Strength Properties of Old Structural Members
Hwang, Kweon-Hwan ; Park, Byeong-Su ; Park, Moon-Jae ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 36~44
It is necessary to assess wood quality and strength of the clear specimens from used members in old wooden structures for the reuse of old members on the same structure or a new structure. Wood species classification by microscope observation of each wood member that was used in truss cord and temple, and several physical and strength tests by the specification of present KS standards were conducted to compare with some references. From the comparison of strengths with references, Korean larch gives relatively better wood quality and mechanical properties than other wood species. No significant deterioration of cell wall was found by microscopic observation for the sound wood part that was selected visually. Tensile specimens with 3 mm in thickness on the middle span showed greater strength than 5 mm thick specimens, which explains that dimension of tensile specimen should be examined for evaluating precise tensile strength properties. Other tests, compression, shear, and bending, are adoptable for each strength properties. Test methods for the evaluation of basic strengths and fastener connections for old wood species should be further examined.
Burning Behavior of Flooring Materials in the Cone Calorimeter and Evaluation of Toxic Smoke
Lee, Jang-Won ; Lee, Bong-Woo ; Kwon, Seong-Pil ; Lee, Byoung-Ho ; Kim, Hee-Soo ; Kim, Hyun-Joong ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 45~53
The burning behaviors of board for flooring materials were investigated using cone calorimetry at an incident heat flux of 50 kWm-2. Seven domestic flooring materials were used to observe the burning behavior of maximum heat release rate, total heat release and average heat release rate. The experimental data indicated that the medium density fiberboard (MDF) flooring had higher release rate than the other flooring materials. Also, the mass loss of MDF flooring was higher than the other floors. When measuring the smoke production from burning, PE fiberboard flooring and PVC Plastic Resin Sheet showed higher carbon monoxide and carbon dioxide yield than the others. The average smoke release of both carbon dioxide and carbon monoxide through specific extinction area was similar. Toxic smoke measurement from flooring materials were determined by the mouse stop motion, and the results indicated that MDF flooring contains more toxic material than the other flooring materials.
Sound Absorption Capability and Anatomical Features of Oak Mushroom Bed Log
Kang, Chun-Won ; Kang, Wook ; Jeong, In-Soo ; Park, Hee-Jun ; Jun, Sun-Sik ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 54~60
Sound absorption coefficients of oak (Quercus mongolica) wood and oak mushroom bed log were measured by the two microphone transfer function method and anatomical features of oak mushroom bed log examined by stereo scope and SEM observations. The sound absorption coefficients of oak mushroom bed log seemed to be higher than those of normal oak wood specimen over all estimated frequency range. Especially, in the frequency range of 2 to 6 kHz, they were about 2∼3 times higher than those of normal wood specimen. Due to fungi degradation, the specific gravity of oak mushroom bed log decreased about 70% than that of normal wood. For oak mushroom bed log, abundant pores occurred on the radial, tangential and cross sectional surface and it was considered that the pores behaved as a sound absorbing pore.
Determination of Localized Defects in Wood by the Transfer Time of Ultrasonic Waves
Park, Jun-Chul ; Hong, Soon-Il ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 61~68
The effect of rupture on the speed of ultrasonic wave was investigated with the PUNDIT and the effective detecting method of defects, moving transmitter and receiver. The speed of ultrasonic wave according to the course of rupture was not affected by transmitter and receiver and in the course of parallel rupture, but only in the course of vertical rupture. When rupture was not located on the ultrasonic wave progressing course, rupture was not detected. However, if rupture was formed perpendicularly to the ultrasonic wave progressing course but located on the ultrasonic wave progressing direction, rupture can be detected. Also, the rupture can be detected, when one transmitter and receiver was placed at top and the other at bottom. After detecting rupture in a part, rupture was determined accurately, placing and moving two transmitters and receivers at width.
Shearing Strength Properties of Bolted, Drift-Pinned Joints of the Larix Glulam － Effects of Fastener Diameter, Slenderness and End-distance on Strength Properties －
Kim, Keon-Ho ; Hong, Soon-Il ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 69~78
A Study on Physical and Chemical Properties of Vegetation Foundation for Rooftop Greening Using Wood Waste
Kim, Dae-Young ; Kim, Mi-Mi ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 79~87
Many researchers have studied on rooftop greening that can be installed in abandoned spaces on a building roof. The most important issue in rooftop greening is the soil weight problem. The light greening materials are needed to solve this problem. Therefore, many alternative materials against the soil were investigated for rooftop greening. In this study, the waste wood chips and the waste paper slurry were evaluated as the lightweight vegetation foundation for rooftop greening. It also has a meaning for recycling of waste materials. The mixture ratio of waste wood chips to waste paper slurry for the board (the foundation of greening) was 60 to 40. The wet strength resin and the sizing agent were additionally added with different amount. After the forming of the board, physical and chemical properties were tested with the variation of wet strength resin and sizing agent. As the result of the test, the board with 15% of wet strength resin in the wet condition showed the highest strength. Futhermore, the moisture evaporation loss from the board surface with sizing agent was much lower than that from the board without sizing agent. Therefore, it was clear that the sizing agent was effective for water retention. The change of thickness in the wet condition was less than 1 mm, and it showed that the board is the predominant material on the dimensional stability. The average pH value of the board was ranged from 7.6 to 8.25.
Antifungal Activity of the Quercus Mongolica Extracts Against Botrytis cinerea
Yeo, Hee-Dong ; Lee, Hyung-Chul ; Lim, Bu Kug ; Kim, Hee Kyu ; Choi, Myung Suk ; Yang, Jae-Kyung ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 88~101
The aim of this study was to attempt the efficacy of antifungal activity of the wood extracts against Botrytis grey mold. Wood chip derived from Quercus mongolica was obtain from steam explosion process and extracted by hot water and methanol and ethanol. The conidial germination was maximum growth with the application temperature for 20 and 25oC. In pH test, we observed the maximum growth in pH 5.0 and 7.0. Antifungal activity was the best in the hot water extractives against Botrytis cinerea. The separation of the antifungal substances was performed using a silica-gel column (n-hexane : chloroform : ethyl acetate : formic acid = 12 : 17 : 8 : 0.2, v/v/v/v), TLC and UV-Spectrophotometer, and isolated 6 fraction group. The result of antifungal activity in 6 fraction group, fraction group Ⅰ and fraction group Ⅱ were the highest antifungal activity against grey mold with the present study. Three peaks in fraction group Ⅰ and Ⅱ were detected by HPLC and this compounds were suppose to effective of antifungal activity.
Functional Composition and Antioxidant Activity from the Fruits of Rubus coreanus according to Cultivars
Park, Young-Ki ; Choi, Sun-Ha ; Kim, Sea-Hyun ; Jang, Yong-Seok ; Han, Jin-Gyu ; Chung, Hun-Gwan ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 102~109
To compare varietal differences in Rubus coreanus Miq. (Rosaceae), we evaluated antioxidant activity and the contents of functional substances. In this study, five new cultivars selected as superior berries in yield and weight of fruit, R. coreanus (Jungkeuam 1, 2, 3, 4, and 5), and one foreign berry, R. fructicosus were used. The contents of the major anthocyanin, cyanidin-3-glucoside (C3G) in berries and antioxidant capacity including, free radical scavenging activity and reducing power were measured. The contents of total phenol and vitamin C were also investigated. Among 5 cultivars and one foreign berry, Jungkeuam 1 had the richest C3G and high levels in vitamin C. DPPH radical scavenging activity of berries was ranged from 46.58 up to 78.55%.
Evaluation of the Potential of Wood Preservatives Formulated with Okara
Kim, Ho-Yong ; Choi, In-Gyu ; Ahn, Sye-Hee ; Oh, Sei-Chang ; Hong, Chang-Young ; Min, Byeong-Cheol ; Yang, In ;
Journal of the Korean Wood Science and Technology, volume 36, issue 1, 2008, Pages 110~123