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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 33, Issue 6 - Nov 2005
Volume 33, Issue 5 - Sep 2005
Volume 33, Issue 4 - Jul 2005
Volume 33, Issue 3 - May 2005
Volume 33, Issue 2 - Mar 2005
Volume 33, Issue 1 - Jan 2005
Selecting the target year
Tree-Ring Dating of Korean Traditional Furnitures: A Case Study on Cabinet and Chest
Park, Won-Kyu ; Kim, Yo-Jung ;
Journal of the Korean Wood Science and Technology, volume 33, issue 3, 2005, Pages 1~10
Tree-ring chronologies can be used to date historical buildings or furnitures by matching them with chronologies of living trees. Tree-ring dating gives a calendar year to each tree ring and produces the cutting dates of logs or woods. In this study, we intend to extend our tree-ring dating applications to Korean furnitures. As a case study, we examined two traditional furnitures, one cabinet 'Jang' and the other chest, 'Bandaji'. The cutting date of the cabinet woods was A.D. 1839. The date of the outmost ring in the chest was A.D. 1904. Due to no bark present, the cutting date of the chest was only estimated as 1930
10 by 'sapwood rings' estimation method. Ring-width pattern of the latter one also indicated that the origin of the chest must be Kangwon province. This case study suggests that tree-ring dating would be a useful and accurate method to identify the critical dates for the chronicles of Korean traditional furnitures.
Species Analysis of Wooden Elements Used in the Bulgapsa Temple of YeongGwang
Park, Won-Kyu ; Nam, Tea-Gwang ;
Journal of the Korean Wood Science and Technology, volume 33, issue 3, 2005, Pages 11~21
The purpose of this study was to identify the species of the woods used in the main building (Daewoongjeon) of Bulgapsa temple in YeongGwang. Eighty eight woods sampled were divided into four parts; pillars(21), rafters(19), purlins(16) and other wood elements(12). Four species were identified; Pinus spp. (hard pines; diploxylon), Abies spp., Quercus spp. and Zelkova serrata Makino. Pillars and corner-angle rafters were mainly Zelkova; however, other wood elements were mostly Pinus spp. The high ratio of Zelkova in this building would be ascribed to the preference of this species to pines owing to its superior quality before the late Chosun Dynasty.
Manufacture and Properties of White Charcoal Board in Relation with Final Mat Moisture Content and Charcoal Particle Size
Lee, Hwa-Hyoung ; Cho, Youn-Mean ; Park, Han-Sang ;
Journal of the Korean Wood Science and Technology, volume 33, issue 3, 2005, Pages 22~29
This research was carried out not only to examine the proper manufacturing condition for white charcoal board in relation to charcoal particle size and final mat moisture content (FMC), but also to maintain the advantageous properties of white charcoal as a well being building material against the sick house problem. Excellent functional white charcoal board was produced with two groups of FMC 20-25% and FMC 36-60%. The latter showed best results among tested samples in two types which are #40-60type-P15%, M5%, FMC 60% and mixed type-P15%, M5%, FMC36% with non formaldehyde adhesives [MDI (M), poly vinyl acetate emulsion (P)] and three stage pressing cycle of 30-10-30 kgf/
(1 min.-1.5 min.-6 min.). The former gave highly acceptable results in two types which are #6 over-M15%FMC25% and mixed type-M25%FMC20%. White charcoal board gave excellent in dimensional stability, gas adsorption and far-infrared emission.
Properties of Ceramics from a Board Mixed with Sawdust and Rice Husk - Effect of Percentage of Resin Impregnation and Carbonization Temperature -
Oh, Seung-Won ; Ji, Piao-Jin ; Jeong, In-Soo ;
Journal of the Korean Wood Science and Technology, volume 33, issue 3, 2005, Pages 30~37
This study aimed at offering basic data to develop a new use of sawdust and rice husk. Research investigated the variation of density, weight loss and dimensional decreasing rate by the percentage of resin impregnation and carbonization temperature of ceramics, which were formed by the percentage of resin impregnation of 40-80% and carbonization of 600-1200
with board impregnated with phenolic resin made from sawdust and rice husk. The results of this study were as follows:1) As the percentage of resin impregnation increased, the thickness shrinkage and weight loss were decreased; on the other hand, density and modulus of rupture increased. Meanwhile, the carbonization temperature at 1200
showed the highest values, as the density was 0.81 g/
and the bending strength was 77.9 kgf/
in the percentage of resin impregnation at 70%. 2) As the carbonization temperature grew higher the linear shrinkage, thickness shrinkage and weight loss increased while the density increased until the carbonization temperature of 1000
; but then decreased slightly at 1200
Effect of Heating Rate and Keeping Time at Maximum Temperature on the Properties of Woodceramics Made from Thinned Logs
Oh, Seung-Won ; Byeon, Hee-Seop ;
Journal of the Korean Wood Science and Technology, volume 33, issue 3, 2005, Pages 38~44
This research investigated the variation of density, the weight loss, dimensional shrinkage and heat conduction by the heating rate and keeping time at maximum temperature of woodceramics, when sawdust boards made from thinned logs of Pinus densiflora, Larix kaemferi and Pinus koraiensis were impregnated with phenol-formaldehyde resin, and then were formed by heating rate (2
/min) and keeping time at maximum temperature (1-5 h). As the heating rate increased, the density and thickness shrinkage decreased, but weight loss and linear shrinkage increased. The more the keeping time at maximum temperature, the greater the linear shrinkage and thickness shrinkage. The heating conduction was superior at the heating rate is 2
/min and the keeping time at maximum temperature of 2 hs.
Changes of Adsorption Properties of Woody Charcoals Prepared by Different Carbonizing Temperature
Jo, Tae-Su ; Ahn, Byoung-Jun ; Choi, Don-Ha ;
Journal of the Korean Wood Science and Technology, volume 33, issue 3, 2005, Pages 45~52
This research was performed to evaluate adsorption behavior of woody charcoals obtained from wood powder, fiber and bark of spruce (Abies sibirica Ledeb). The wood materials were carbonized at various temperatures for 1 hour using experimental rotary kiln without any inert gas. The adsorption capacity of iodine and toluene, specific surface area and removal efficiency of acetic acid and ammonia gas of those charcoals were measured. The higher was the temperature for carbonization, the lower yields of charcoals were. Ash content of bark charcoal was higher than that of wood powder charcoal or fiber charcoal. Elemental analysis of woody charcoal revealed that the content of carbon was gradually lincreased as carbonization temperature was higher. When carbonization temperature was higher, adsorption capacity of woody charcoals for iodine was much improved. Wood powder charcoal and fiber charcoal were more effective for iodine adsorption rather than bark charcoal. Capacity of toluene adsorption was the highest in the charcoal of 600
. Charcoals produced at high temperature efficiently removed acetic acid gas, while charcoals carbonized at low temperature such as 400
were proper to remove ammonia gas. This difference may be explained that the acidity of charcoals depends on the carbonization temperature: charcoals of low temperature indicate acidic property, while those of high temperature turned to alkaline.
Evaluation of Leaching Stability of Preservative Treated Wood in the Seawater for the use of a Fish-breeding Ground
Lee, Myung-Jae ; Lee, Dong-Heub ; Son, Dong-Won ;
Journal of the Korean Wood Science and Technology, volume 33, issue 3, 2005, Pages 53~63
This study attempted to obtain the basic data of utilizable possibility of preservative treated wood as a material used in a marine ranch. To evaluate the leaching stability of CCA－, CCFZ－, and ACQ-treated woods in seawater, the specimens treated with 2% and 3% (w/v) of CCA, CCFZ, and ACQ were exposed to deionized water, synthetic seawater and natural seawater for 41 days and then each component released was periodically determined. There was little amount of copper and chromium released from CCA-treated wood exposed in both deionized and seawater. Although relatively large amount of arsenic was released from CCA-treated wood, the release rate in seawater was lower than that in deionized water. The release rate of chromium and zinc from CCFZ-treated wood were somewhat greater in deionized water, but lower in seawater than in deionized water. Retention level and salinity of synthetic seawater had little effect on the release rate of components. The ACQ-treated wood had greater copper release than CCA- and CCFZ-treated wood, and the amount of copper released did not affected by leaching media used.
Penetrating Performance of Wood-preservatives by Ultrasonic Steeping
Lee, Myung-Jae ; Lee, Dong-Heub ; Lee, Hyun-Mi ; Son, Dong-Won ;
Journal of the Korean Wood Science and Technology, volume 33, issue 3, 2005, Pages 64~71
In this study, we attempted to apply ultrasonic treatment for the preservative treatment of two softwood species, Korean pine and Japanese red pines to evaluate its effectiveness. Wood samples were submerged in oilborne preservative, copper naphthenate (NCU) and waterborne preservative, alkyl ammonium compound (AAC) and then treated with ultrasonic wave of 40 kHz, 400 W. After the treatment, the retention and penetration depth of these preservatives in the specimens were measured as a function of treatment time. Both the retention and penetration depth were continuously increased with increasing the treatment time up to 120 hours, where the retention reached about 95% by the application of AAC and the penetrating depth of 95% and 83% by the application of NCU, respectively for both species. The results of electronic microscopic observation showed that the improved retention capacity could be attributed to air deflation, wood extractive deflation working of ultrasonic wavelength, and destruction of wood pits which served as the pathway of preservatives. The results suggested that the use of ultrasonic treatment could be applied to thick wood veneers for the production of laminated wood products.
Investigation of Active Antifungal Compounds of Essential Oil from Chamaecyparis obtusa Against Dermatophytes, Microsporum canis and Trichophyton Mentagrophytes
Park, Mi-Jin ; Lee, Soo-Min ; Gwak, Ki-Seob ; Jeung, Eui-Bae ; Chang, Je-Won ; Choi, In-Gyu ;
Journal of the Korean Wood Science and Technology, volume 33, issue 3, 2005, Pages 72~78
The present study was conducted to evaluate the application of Chamaecyparis obtusa and to investigate potential utilization of essential oil from C. obtusa as plant-based medicine. The antifungal activity of essential oil from leaves and twigs of C. obtusa (Sieb. Et Zucc) was determined and the major components of active fractions against Microsporum canis (KCTC6591) and Trichophyton mentagrophytes (KCTC6077) were identified by GC/MS analysis.In treatment of essential oil from C. obtusa, the strain M. canis was more resistant than the other, T. mentagrophytes. In the agar diffusion assay, essential oil from C. obtusa inhibited hyphal growth of M. canis and T. mentagrophytes at the concentration of more than 5,000 ppm. The zones named B and C in the TLC assay of essential oil from C. obtusa showed antifungal activities. Among four sub-fractions of n-hexane extract from B and C zones, named as B-1, B-2, C-1 and C-2, the C-2 showed the highest antifungal activity. Instrumental GC/MS analysis for sub-fractions showed that a major component of C-1 was
-terpineol as terpene alcohol, while C-2 contained sesquiterpenes such as elemol, cedrol and eudesmol.
Chemical Characteristics and Application for Kraft Pulp of Bed Log Wastes
Jeong, Myung-Joon ; Kim, Dae-Young ; Jo, Byoung-Muk ; Oh, Jung-Soo ;
Journal of the Korean Wood Science and Technology, volume 33, issue 3, 2005, Pages 79~88
This research studied the utilization of the bed log wastes as a papermaking grade pulp. Five different bed log samples from shiitake mushroom (Lentinus edodes (Berk.) Sing) cultivation were collected by the cultivating periods of 1 to 5 years. The wood chemical composition and the characteristics of kraft pulping of each sample were investigated. The results of chemical composition showed that the rate of carbohydrate (glucose and xylose) content in sapwood was decreased as the cultivation period was increased. In heartwood, there was no significant difference. The screening yield of non-cultivated bed log from kraft pulping was higher than that of cultivated one, but the reject of cultivated one, especially for 5 year-cultivated, was lower than non-cultivated bed log. The fiber length and width was continuously decreased as the cultivation period was increased. Therefore, the freeness of the pulp from the cultivated bed log was sharply decreased comparing to non-cultivated due to the fiber cutting and the increased fine content. The dry strengths were increased according to the increasing addition level of bed log kraft pulp to KOCC and non-cultivated wood pulp. From the overall results, the pulp from 5 years cultivated bed log can be reasonably used if it is mixed with long fiber pulp for advantages such as reducing beating time.