• Journal of the Korean Wood Science and Technology
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• 제27권1호
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• pp.9-17
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• 1999

목재의 강도에 영향을 미치는 인자는 다양하기 때문에 본 연구에서는 국산 참나무 아속 주요수종인 굴참나무, 갈참나무, 졸참나무, 신갈나무, 상수리나무를 대상으로 해부학적 특성과 휨강도와의 관계를 규명하여 참나무 아속의 합리적인 이용방안을 위한 기초자료를 얻었다. 해부학적 특성가운데 휨강도에 가장크게 영향을 미치는 인자는 굴참나무는 $1mm^2$ 당 만재 관공의 수, 갈참나무와 신갈나무는 microfibril 경사각, 졸참나무는 목섬유의 길이, 상수리나무는 단열 방사조직 높이였다.

• Journal of the Korean Wood Science and Technology
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• 제36권4호
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• pp.77-83
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• 2008

국내에서 생장한 주요 침엽수 3종(소나무, 잣나무, 리기다소나무)의 수간 내 마이크로피브릴 경사각(microfibril angle, MFA)의 축방향 및 방사방향 변이를 요오드 침적법에 의해 조사하였다. 각 수종의 MFA의 평균값은 소나무 $16.4^{\circ}$, 잣나무 $14.4^{\circ}$, 리기다소나무 $26.2^{\circ}$로 리기다소나무가 가장 크게 나타났다. 공시 수종의 MFA는 약 15~20 연륜까지 감소하다가 그 후 거의 안정된 경향을 보여 주었고 만재부의 MFA는 조재부의 MFA보다 다소 작은 경향이 있었다. 공시재료의 수고에 따른 MFA의 차이는 기부 부분에서 다소 크게 나타났으며 수고가 증가함에 따라 MFA는 감소하는 경향이 있었으나 리기다소나무 조재부는 예외였다. 따라서 MFA는 국내산 주요 침엽수재의 미성숙재와 성숙재를 구분하는 지표의 하나로 이용이 가능할 것으로 생각되었다.

• Journal of the Korean Wood Science and Technology
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• 제38권6호
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• pp.490-497
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• 2010

국내산 밤나무 목재의 효율적 이용을 위한 기초 자료를 얻기 위하여 밤나무 7품종(단택, 이취, 이평, 만성, 은기, 유마, 축파)의 목섬유 및 도관요소 길이를 대상으로 방사방향 변이성을 조사하였다. 목섬유 및 도관요소 길이는 조재와 만재 부위를 구별하여 3연륜 간격으로 광학현미경과 화상분석기를 사용하여 측정하였다. 밤나무 수간에 있어 만재 목섬유의 길이가 조재의 것보다 다소 더 길었으며, 조재 및 만재 모두에 있어 연륜 증가에 따라 목섬유 길이가 증가하는 경향이 나타났다. 이와 유사하게, 만재 도관요소의 길이 역시 조재의 것보다 다소 더 길었으며, 조재 및 만재 모두에 있어 연륜 증가에 따라 도관요소의 길이가 완만하게 증가하는 경향을 보였다. 결론적으로 밤나무 수간에 있어서의 목섬유 및 도관요소의 길이는 성숙재와 미성숙재를 판단하는 재질 지표로 이용될 수 있을 것으로 생각된다

• 한국가구학회지
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• 제21권1호
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• pp.54-61
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• 2010

This study was carried out to identify the differences of some macro and microanatomical features between Eunsasi poplar (Populus tomentiglandulosa T. Lee) and Konara oak (Quercus serrata Thunb.). Anatomical features such as vessel and fiber diameter, cross sectional area of ray parenchyma and endwall pit aperture diameter in ray parenchyma were compared. Differences of anatomical features between two species were found statistically significant. Earlywood vessel diameter in poplar and oak increased from pith to bark while it was found almost stable in latewood. Fiber diameter in poplar was higher than oak fiber. Ray area and the pit aperture diameter in endwall of ray parenchyma were found higher in oak than those in poplar.

• 한국가구학회지
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• 제19권2호
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• pp.124-129
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• 2008

Moisture content of Larix kapempferi was maintained at 28% after air drying. 5% CCFZ solution penetration depth was observed through longitudinal tracheid and axial resin canal. Penetration depth was increased significantly from heartwood to sapwood and the penetration depth was found 1.3 times higher for sapwood measured at 15.0 second of penetration. On the other hand, liquid flow in sapwood and heartwood involved most liquid first entering the resin canals. Overall resin canal conducted 1.4 times more than tracheid. Latewood was found more permeable than in earlywood. At the beginning of penetration, the speed was high and then decreased in the course of time.

• Journal of the Korean Wood Science and Technology
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• 제35권2호
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• pp.16-22
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• 2007

The behavior of ramie fibers and some wood elements in the early stage of alkali swelling was examined. When the fibers were treated with alkali solution, they significantly shrank in length and swelled in wall thickness. Ramie fibers showed a shrinkage averaging 23% in length and a swelling averaging 92% in width in 100 seconds treating time. Dimensional changes showed different fashion in each element of woods. The tracheids of latewood especially in Pinus densiflora and Larix kaempferi woods swelled intensively and showed balloon swelling, but in the case of Cryptomeria japonica, it was hardly observed. The swelling morphology of libriform fibers was similar to that of tracheids. The walls of vessel elements and parenchyma cells also swelled considerably in thickness but, no balloon swelling was found in both elements. The differences of swelling in different elements can be interpreted in terms of the differences of organization and/or chemical components of the cell walls.

• 한국가구학회지
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• 제18권4호
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• pp.312-316
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• 2007

A study was conducted to know 99.5% ethyl alcohol penetration depth in radial and longitudinal direction of Castanea crenata. Alcohol penetration depth was found higher in longitudinal direction by about 12.47 times. In both earlywood and latewood, fiber conducted alcohol in higher depth than that of large and small vessel. Penetration depth of alcohol after 15.0 second of penetration in longitudinal direction, there was no significant difference among fiber in sapwood and heartwood, and vessel in sapwood. At the beginning of penetration the speed was high and then gradually decreased.

• 한국가구학회지
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• 제18권2호
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• pp.138-142
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• 2007

Optical microscope was used to observe the difference of safranine penetration in Pinus densiflora, Pinus rigida, Pinus koraiensis and Larix kaempferi grown in Korea. It was found that Pinus koraiensis contained the highest number of ray parenchyma and ray tracheids. In longitudinal direction, latewood penetration was found higher than that of earlywood. The number of resin canals was found highest in Pinus koraiensis and lowest in Pinus rigida. The resin canal conducted safranine higher than longitudinal tracheids. In longitudinal direction, safranine diffused from longitudinal tracheid to ray parenchyma through the cross-field pits and from the longitudinal resin canal to ray parenchyma or longitudinal tracheid. Safranine diffused from longitudinal tracheid to its neighboring tracheid through bordered pit or ray parenchyma through the cross-field pits.

• 한국가구학회지
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• 제12권1호
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• pp.1-9
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• 2001

This study was carried out to elucidate the relationship between wood anatomy and the water flow path in P. koraiensis and L. leptolepis. through the experiment of penetration of the dye solution. The experiment was performed by permeating 1% acid, alkali and direct solution into the xylem just after being cut. The results obtained were summarized as follows : 1. In P. koraiensis and L. leptolepis, the dye solution penetrated into sapwood and annual rings adjacent to cambial zone were only dyed according to ascent of tree height. 2. The penetrability of latewood was better than that of earlywood. 3. In P. koraiensis and L. leptolepis, the main water flow path in longitudinal direction was the trachied and that in transverse direction was ray trachied and ray parenchyma. Also, the dye solution was found in resin canal. 4. P. koraiensis was more permeable than L. leptolepis. 5. Among the acid, alkali and direct dye solution, the acid dye solution was the most permeable.

• Journal of the Korean Wood Science and Technology
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• 제36권2호
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• pp.9-20
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• 2008

Anatomical comparison of 3 North American species with commercial name of redcedar was executed to provide taxonomic information for prevention of confusion and establishment of sound business transaction in the wood market. Eastern redcedar (Juniperus virginiana) and southern redcedar (Juniperus silicicola) could not be separated on the basis of microstructure and ultrastructure of wood. Western redcedar (Thuja plicata), however, appeared to be obviously separated from eastern and southern redcedar in a number of microscopic and ultramicroscopic features. Useful features for separating these two groups were intercellular spaces in transverse surface, latewood width, radial intertracheid pitting, warty layer and pits with torus extensions in tracheids, ray composition, nodular end walls in ray parenchyma cells, and cross-field pitting.