Go to the main menu
Skip to content
Go to bottom
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 31, Issue 6 - 00 2003
Volume 31, Issue 5 - 00 2003
Volume 31, Issue 4 - 00 2003
Volume 31, Issue 3 - 00 2003
Volume 31, Issue 2 - 00 2003
Volume 31, Issue 1 - 00 2003
Selecting the target year
Acoustical Environment and Wood Science
Chung, Woo-Yang ; Kang, Wook ;
Journal of the Korean Wood Science and Technology, volume 31, issue 2, 2003, Pages 1~15
Effects of Thinning on the Timber Quality of Pinus koraiensis Grown in Korea
Chong, Song-Ho ; Jung, Doo-Jin ; Park, Byung-Su ; Chun, Su-Kyung ;
Journal of the Korean Wood Science and Technology, volume 31, issue 2, 2003, Pages 16~23
The study was performed to obtain basic data for high quality timber production and efficient utilization of woods by investigating the effects of thinning on timber quality of domestic Korean pine(Pinus koraiensis Sieb. et Zucc.) planted. The results of this study were summarized as follows ; Comparing the appearance of knot per one meter on log surface, the heavy thinned trees contained less knots than non-thinned ones. And the ratio of dead knots was decreased in heavy thinned trees compared with the non-thinned ones, but the knot size was increased. The inclination angle of dead knot is larger than that of live knot. The crooked logs in heavy thinning plot appeared less than those in non-thinning plot. In heavy thinning plot, the log circle percentage of cross section and the ratio of clear lumber were increased, compared with in non-thinning one. The grade of log was the highest in heavy thinning plot.
Chemical Constituents from the Fruit Bodies of Lentinula edodes
Lee, Hak-Ju ; Yoon, Kab-Hee ; Bak, Won-Chull ;
Journal of the Korean Wood Science and Technology, volume 31, issue 2, 2003, Pages 24~30
Three nucleotides, one amide, acid and steroid, were isolated from the fruit bodies of Lentinula edodes. The structures were determined as adenosine (9-
-D-ribofuranosyladenine), uridine (1-
-D-ribofuranosyluracil), uracil (2, 4-pyrimidinedione), nicotinamide, p-hydroxybenzoic acid and ergosterol (ergosta-5, 7, 22-triene-3
-ol), respectively, on the basis of spectroscopic data and chemical correlations.
Investigation of Transmission Process for Ultrasonic Wave in Wood
Lee, Jun-Jae ; Kim, Gwang-Mo ; Bae, Mun-Sung ;
Journal of the Korean Wood Science and Technology, volume 31, issue 2, 2003, Pages 31~37
Among the nondestructive evaluation (NDE) methods for wood defect detection, ultrasonic wave has been considered as competitive technique in terms of economics and workability. Until now, researches on application of NDE methods for wood have focused mainly on standing tree and logs. Recently, some attempts have been conducted with NDE technique, for evaluation of wooden structural members. However, wooden structural members are different from others (standing tree or log) in various aspects. Expecially when some parts or whole member are covered with other materials, they can't be evaluated appropriately on general NDE methods. For the purpose of development of proper NDE technique for the wooden structural members, the ultrasonic wave transmission process investigated on artificial defect in wood. First, various types of transmission process were assumed, and then the transmission times were predicted respectively. Predicted times were compared with the measured time of ultrasonic wave and then a suitable type of transmission process is determined. In case of the ultrasonic wave doesn’t transmit directly due to defect, it is reflected once only at the opposite surface of member, and the path is accord with the line of shortest length.
Deformation of Flush Door Depending on Core Construction Under the Change of Environmental Condition
Jang, Sang-Sik ;
Journal of the Korean Wood Science and Technology, volume 31, issue 2, 2003, Pages 38~44
This study was carried out to evaluate the feasibility of using HDF as surface panels as well as core materials for flush door manufacturing. Six core constructions were developed and applied to manufacture door specimens and conventional skin door specimen was also manufactured for comparison. Door specimens were tested under changing interior environmental condition for 3～4 months during winter and summer seasons. During the test period, deformation of doors were measured weekly, and temperature and relative humidity of testing area were also recorded. From this study, it was concluded that HDF can be used to manufacture quality flush doors and core construction developed in this study showed good quality compared to conventional skin door. Deformation of doors increased as temperature and relative humidity of the surrounding environment increased. Flush doors generally showed less deformation than skin doors, and evaluated to be stable and good quality when compared to skin door.
Extractives from the Sapwood of Betula maximowicziana
Lee, Hak-Ju ; Kato, Atsushi ;
Journal of the Korean Wood Science and Technology, volume 31, issue 2, 2003, Pages 45~51
One flavonoid, lignan glycosides and two diarylheptanoids were isolated from the sapwood of Betula maximowicziana. The structures were determined as : catechin 7-O-
-D-xylopyranoside, lyoniresinol 9'-O-
-D-glucopyranoside, 11-oxo-3, 8, 12, 17-tetrahydroxy-9-ene[7, 0]-metacyclophane and 11-oxo-3, 8, 9, 10, 12, 17-hexahydroxy[7, 0]-metacyclophane, respectively, on the basis of spectrosopic data and chemical correlations.
Classification of Insects Collected in Historical Wooden Building
Jeong, In-Soo ; Lee, Yang-Soo ; Lee, Hee-Kwon ;
Journal of the Korean Wood Science and Technology, volume 31, issue 2, 2003, Pages 52~57
This research is to collect, classify and identify the insects boring tunnels into wood or damaging wooden frame structure. Intensive insect collections have been carried at the historical local schools annexed to the confucian shrine from March to September 2001. Ten species of Coleoptera, 15 species of Hymenoptera, 6 species of Hemiptera, 4 species of Ditera and 1 species of Demaptera were recorded. Most species of Coleoptera and Hymenoptera have the manducatory apparatus in the mouth-part that cause severe damage in wood, and showed the highest population among the genera recorded. Further research should be considered on the identification of wood demage insects at the species level among present collection and their mechanism of wood demage in the wood.
Difference of Deterioration According to Exposed Condition of Column in Wooden Traditional Building
Kim, Gwang-Chul ; Bae, Mun-Sung ; Lee, Jun-Jae ;
Journal of the Korean Wood Science and Technology, volume 31, issue 2, 2003, Pages 58~68
Capacity assessment of structural member must be ahead of the safety assessment of wooden traditional building. Capacity assessment of structural member has been dependent on empirical method with visual inspection even now. Safety assessment of building, however, can be more correct and reasonable provided non-destructive evaluation technique that scientific and logic would be used to evaluate the capacity of structural member. For that purpose, non-destructive evaluation technique was applied to column among many structural members of wooden traditional building to examine the possibility of capacity assessment of structural member. And then, those data will be used as a basic data for capacity assessment of structural member in a following study. Specially, deterioration progress levels of column according to exposed condition were measured. Similar results were obtained as compared with results of visual inspection, so there was a good possibility of application for non-destructive evaluation technique.
Study on Damage of Column of Wooden Traditional Building by Insects
Kim, Gwang-Chul ; Jeong, In-Soo ;
Journal of the Korean Wood Science and Technology, volume 31, issue 2, 2003, Pages 69~76
Front columns of buildings were most severely damaged by insects. Hole diameter damaged by insects were different in each location on columns, that is, bottom, middle position, or top of columns. That mean various insects attacked on columns of wooden traditional buildings because kinds of each insect depends on the hole diameter. Specially, middle position of columns were harmed seriously. Hole diameters damaged by insects were various from 1 mm to 10 mm, but approximately 5 mm diameter was found most commonly.
Effect of Hot-Pressing Time and Temperature on Properties of Bamboo Zephyr Boards
Jung, Ki-Ho ; Kim, Yu-Jung ; Roh, Jeang-Kwan ; Park, Sang-Jin ;
Journal of the Korean Wood Science and Technology, volume 31, issue 2, 2003, Pages 77~83
In this research, in order to investigate the effect of hot-pressing condition, properties of bamboo zephyr boards (target density 0.7 g/
12 mm) produced by different hot-pressing time and temperature were compared through Korean Standard(KS) F 3104 and F 3113, and the results were summarized as follows: All of the boards had comparatively high values in bending properties (MOR, MOE) irrespective of hot-pressing condition, and the boards hot-pressed by
and 12 min showed the highest strength in parallel direction of board-surface to span. Internal bond (IB) strength of the boards generally increased with the increase of hot pressing temperature. Boards produced by hot pressing temperature and time of
and 12 min and
and 10 min exhibited relatively higher wet-bending strength. Thickness swelling (TS) of all the boards showed good dimensional stability of 6% or less.
The Bending Strength Properties and Acoustic Emissions to the Difference of Finger Widths
Ryu, Hyun-Soo ; Ahn, Sang-Yawl ; Lee, Gyun-Pil ; Park, Han-Min ; Byeon, Hee-Seop ;
Journal of the Korean Wood Science and Technology, volume 31, issue 2, 2003, Pages 154~161
In this study, the three species (Populus euramericana, Pinus densiflora and Quercus variabilis) were cut to difference (0, 0.15, 0.3, 0.45 mm) between the size of tip and that of root of the finger (DSTR) and jointed with poly vinyl acetate (PVA) and resorcinol-phenol resin (RPR). We described the relationship between the bending strength properties of finger DSTR and the acoustic emission (AE) generated during the bending test. The results were as follows: The AE generation time of finger-jointed specimens with RPR adhesive was earlier than that with PVA adhesive. The AE cumulative event count of finger-jointed specimens with RPR adhesive continuously increased with increasing load and the event count was much more than that with PVA adhesive. Also, the AE cumulative event count for resorcinol-phenol resin adhesive obtained from low load level was abundant. The AE wave in finger-jointed specimens with RPR adhesive could be detected in the below proportional limit load. Therefore, AE signals from bending test are useful for the estimation of strength in finger DSTR specimens.