• Journal of Korean Society of Forest Science
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• v.15 no.1
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• pp.39-41
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• 1972

Yew heartwood from different species was analysed by thin-layer chromatography for its phenolic content. A separation could be made between the species examined on the basis of the occurrence of heartwood phenols.

• Journal of the Korea Furniture Society
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• v.21 no.5
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• pp.413-423
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• 2010

The study has been carried to evaluate the wood color, a typical element of visual and decorative effect, for seven major domestic softwoods using L*a*b* and chrominance ($\Delta$E*ab). The result showed that the values of whiteness, redness, and yellowness were positive at both sapwood and heartwood and there were no wood having a small chrominance difference ranged 0~0.5. There was also no wood having a chrominance difference ranging 0.5~3.0. Ginkgo biloba, Pinus koraiensis, and Larix kaempferi wood showed a little different chrominance, Taxus cuspidata, Pinus densiflora for. erecta, and Pinus densiflora wood substantial different chrominance, Juniperus chinensis wood largest different chrominance. It is concluded that the study results could be utilized as a data base in areas of wood craft and furniture and could open a way to substitute foreign imported woods.

• Journal of Plant Biology
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• v.35 no.4
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• pp.339-358
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• 1992

The bark morphology and anatomy of six species in Korean gymnosperms were examined with light and scanning electron microscopes. The species were Thuja orientalis (Cupressaceae), Ginkgo biloba (Ginkgoaceae), Cyeas revoluta (Cycadaceae), Pinus koraiensis (pinaceae), Taxus cuspidata (Taxaceae), Cryptomeria japoniea (Taxodiaceae). We described the bark features such as surface colour, thickness, depth of inner and outer bark. presense or absence and features of expansion tissue of ray, composition of periderm, and component cells of secondary phloem. The comparison with these features showed significant differences among all six species. Furthermore. it was suggested that sclereids types and sieve area shapes in sieve cells might be useful to the comparative morphological studies of gymnosperms.sperms.

• Proceedings of the Korean Society of Toxicology Conference
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• 2002.05a
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• pp.117-117
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• 2002

Paclitaxel isolated from the pacific yew tree, Taxus brevifolia, is microtuble-stabilizing agent that has a promising anticancer activity against a wide variety of tumors such as ovarian, breast and lung cancers. Because of its poor water solubility, paclitaxel is currently formulated in a mixture of polyoxyethyleneglycerol triricinoleate 35 (Cremophor EL) and dehydrated ethanol USP (1:1 v/v).(omitted)

• YAKHAK HOEJI
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• v.43 no.4
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• pp.502-508
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• 1999

Chitin is an important structural component of fungal cell wall and is synthesized by chitin synthase I, II, and III. The chitin synthase II is an essential enzyme for the formation of primary septum in Saccharomyces cerevisiae. Therefore, specific inhibitors of this enzyme might block the formation of fungal cell wall and could be used as effective antifungal agents. To search chitin synthase IIinhibitors from natural products, 67 plants were extracted with methanol and examined for the inhibitory activities against chitin synthase II of S. cerevisiae by our cell free assay system. As a result, the extracts from 16 plants showed more than 70% inhibition at the concentration of $280{\;}\mu\textrm{g}/ml$. Of note, Laurus nobilis (81.4%), Lonicera maackii (81.5%), Berchemia berchemiaefolia (82.9%), Koelreuteria paniculata (87.9%), Chamaecyparis pisifera (86%) and Taxus cuspidata (83.9%) inhibited strogly the chitin synthase IIactivity.

• Korean Journal of Environment and Ecology
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• v.13 no.1
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• pp.70-77
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• 1999

덕유산의 향적봉과 남덕유산을 잇는 아고산지대(1.350~1.600m)에 분포하는 한국특산종 구상나무의 생육현황과 구상나무림의 군집구조를 정확히 파악하여 앞으로의 구상나무림 관리의 기초자료를 마련하고자, 구상나무가 분포하는 지역에 27개의 조사구(20m$\times$20m)를 설치하여 식생을 조사하였다. 덕유산 아고산지대 구상나무림의 종구성적 특성은 신갈나무 - 주목 - 구상나무군집이었다. 수종간의 상관관계에서는 주목과 병꽃나무; 호랑버들과 부게꽃나무; 백당나무와 호랑버들; 당단풍과 조릿대 등의 종들 간에는 높은 정의 상관이 인정되었고, 구상나무와 병꽃나무; 신갈나무와 노린재나무 등의 수종들 간에는 높은 부의 상관이 인정되었다. 해발고와 정의 상관이 인정된 것은 주목과 백당나무 등이었고, 부의 상관이 인정된 것은 쇠물푸레이었다. 구상나무의 활력이 저조한 것으로 나타났으며, 18.18%는 고사목이었다. 구상나무 고사목은 흉고직경 10~30cm 의 범위에 드는 것들이 대부분이었다. 생육현황표의 점수 평균은 11.73점이었고, 점수와 토심과는 고도의 부의 상관이 인정되었다.

• Korean Journal of Agricultural Science
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• v.39 no.4
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• pp.525-534
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• 2012

This study was conducted to classify community and verify vegetation structure of Picea jezoensis community in subalpine zone of Mt. Kyebang, Mt. Jiri, Mt. Deogyu, 39 releves set up and was carried out to analyze ordination. P. jezoensis Community was classified into Acer ukurunduense subcommunity, Quercus mongolica subcommunity, Syringa reticulata var. mandshurica subcommunity and P. jezoensis typical subcommunity. The order of important value of the forest community with DBH 2cm above plants was P. jezoensis (89.22), Acer komarovii (30.50), Abies koreana (18.81), Rhododendron schlippenbachii (18.10), Sorbus commixta (17.19), Betula ermanii (16.89), Pinus koraiensis (16.80), Taxus cuspidata (12.45), Acer ukurunduense (11.73). The DBH analysis suggests that P. jezoensis will maintain dominant position.

• KSBB Journal
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• v.13 no.4
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• pp.438-443
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• 1998

Effects of various environmental factors on cell size index(FCW/DCW) in Thalictrum rugosum. Lithospermum erythrorhizon and Taxus cuspidata plant cell suspension cultures were investigated. Time course change of cell size index were also observed. In batch cultures, FCW/DCW increased according to the decrease of sugar concentration. For short-term experiment within 24 hr, FCW/DCW value could be reduced significantly by increasing sugar concentration. When an osmoticum such as mannitol was added, FCW/DCW converged to a low value. Therefore, it was confirmed that osmolality of the medium was important in determining cell size or water content of the cells. Inorganic salts or treatment with organic solvent also exhibited some effect on the cell size index. However, pH and centrifugal force did not show any influences. On the other hand, it was found that the addition of Pluronic F-68 reduced FCW/DCW. By combining these results effectively, it may be possible to increase the cell concentration in high density culture to a higher extent.

• The Korean Journal of Ecology
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• v.9 no.4
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• pp.201-208
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• 1986

The water status of the leaves of several evergreen plants was investigated in order to discuss the geopgraphical distribution of them. Relastionship between relative water content and water potential of the leaves showed linear decrease for evergreen conifers but exponential decrease for Korean box tree (Buxus microphylla var. koreana). On the basis of the leaf water potential, the water status of the conifers during wintering was distinctly divided into three periods; hardening, cold resistance and dehardening, but lacking in those periods for the Korean box tree, where the status continously decreased. In the cold resistance the leaf water potentials were -23 bar for both spruce (Picea jezoensis) and yew (Taxus cuspidata). From these results and threshold temperature at beginning of hardening, distribution of the conifers was explained that in order of the red pine, the Korean white pine, the yew and the spruce the distribution could be extended at higher altitudes and in more northward areas, whereas the distribution of the Korean box tree was restricted to the lowland of temperate zone.

• Journal of the Korean Institute of Landscape Architecture
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• v.22 no.4
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• pp.177-185
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• 1995

To investigate vegetation structure and succession of forest in the Deokyusan National Park, field survey was performed from July to September, 1992 and the results were as follows; The forest vegetation of Deokyusan National Park was classified into four communities by the factor of altitude. The successional trends of tree species by DCA ordination seem to be from Pinus densiflora to Carpinus laxiflora and Betula schmiatii and also, Quercus spp. through Cornus walter and Platycarya strobilacea to Q. mongolica, Abies holophylla and Taxus cuspidata. The diversity indices seemed to be affected by the factors of altitude. Especially, evenness showed several difference according to altitude. Comparing vegetation structure of lower layer for the recess system and one others, more number of species and species diversity were observed.