• Korean Journal of Pharmacognosy
• /
• v.33 no.2 s.129
• /
• pp.137-143
• /
• 2002

The inhibitory effects of methanol extracts of 165 medicinal herbs on matrix metalloproteinase-2 (MMP-2) activity were investigated. Amongst the herbal extracts, Youngia denticulate, Platycarya strobilacea, Sedum kamtschaticum, Euscaphis japonica, and Comus controversa showed a significant inhibitory effect with above 80% at $1\;{\mu}g/ml$. Above mentioned five kind extracts, which exclude polyphenols and/or tannin by techniques for their removal, showed a mild inhibitory effect on MMP-2 activity except for Y. denticulate at the same concentration.

• Advances in Traditional Medicine
• /
• v.3 no.1
• /
• pp.1-7
• /
• 2003

Some Korean plants were found to inhibit HIV-1 protease activity. The extracts of Acanthopanax koreanum (stem bark), Berchemia berchemiaefolia (stem), Berchemia berchemiaefolia (bark), Distylium racemosum (leaves), Distylium racemosum (stem), Lindera erythrocarpa (leaves), Physalis alkekengi var. francheti (root), Platycarya strobilacea (stem), Rodiola rosea (root), Rosa davurica (stem), Syringa dilatata (leaves), Viburnum awabuki (stem) and Viburnum awabuki (leaves) showed significant inhibitory effect against HIV-1 protease. Camelliatannin H from Camellia japonica and uvaol from Cratagus pinatrifida were potent active inhibitors of HIV-1 protease with $IC_{50}$ values of $0.9\;{\mu}M$ and $5.5\;{\mu}M$, respectively. The cure and prevention of AIDS have been a global challenge since it was discovered in the ealy 1980s. However, the development of anti-HIV agent that can effectively treat or prevent this disease are still demanded.

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

• Journal of the Korean Society of Environmental Restoration Technology
• /
• v.23 no.4
• /
• pp.31-45
• /
• 2020

This study suggested the planting models of Carpinus turczaninowii community to make in Badahyanggi Arboretum and was carried out to the structure of C. turczaninowii commnity in Daebu-Yeongheung Islands. In order to identify the current ecological environment, this study set to 13 plots(i.e. 100㎡) for analysing detailed structure of plant communities. The research methodology was qualitative analysis. It used TWINSPAN, PCA and Indicator Species Analysis tools which are performed well in several comparisons of classification techniques and one of the ordination techniques showed that the plant communities. The results were classified into 3 communities that C. turczaninowii-Pinus densiflora community(I), C. turczaninowii-Quercus serrata community(II) and C. turczaninowii-Platycarya strobilacea community(III). In all of communities, C. turczaninowii was dominant species in canopy layer and understory layer, the degree of closure was high. Proposed the planting models that are I~II communities based on planting status in Badahyanggi Arboretum(Island Plant Botanical Garden), the structure of plant communities, indicator species and individual distribution by DBH classes. Also, The multi-layer planting plans are necessary, such as P. strobilacea, Lindera erythrocarpa, Viburnum carlesii, V. dilatatum, Ligustrum obtusifolium, Zanthoxylum schinifolium and so on.

• Korean Journal of Environment and Ecology
• /
• v.33 no.6
• /
• pp.708-721
• /
• 2019

This study was conducted to understand the plant community structure characteristics of warm-temperate forest in Geoje Island. Survey sites were set up on ridges, valleys, and slopes where evergreen broad-leaved trees predominated or distributed in canopy, sub-canopy, or shrub layers at Chunjangsan(Mt.). Thirty-one sites were located in the areas, such as vegetation community, ridges, valleys, and slopes, to observe vegetation structure and location changes. The community classification with TWINSPAN identified six groups: Neolitsea sericea-Platycarya strobilacea, N. sericea-Styrax japonicus, N. sericea-Euonymus oxyphyllus, Pinus thunbergii-N. sericea, N. sericea-Quercus serrata, and Q. variabilis-P. strobilacea. Considering the results of previous studies that reported that the successional pattern of the warm temperate forests progressed from deciduous to evergreen forests, the regions predominated by deciduous communities such as P. thunbergii, Q. serrata, P. strobilacea, Zelkova serrata, and Q. variabilis, is likely to transform into the evergreen forest predominated by N. sericea. The relationship between the impact of the environmental factors and the vegetation distribution showed that slope, Na +, K +, electrical conductivity, and clay among physical properties had direct or indirect effects on vegetation distribution.

• Korean Journal of Environment and Ecology
• /
• v.16 no.1
• /
• pp.68-86
• /
• 2002

The vascular plants in Bulgapsan, Younggwang-gun, Jeollanam-do, were consisted of 437 taxi; 104 families, 289 genus, 382 species, 51 varieties, 4 forma. From the floristic point of view, Bulgapsan is belongs to the South Province in Korea represented as Platycarya strobilacea, Cudrania tricuspidata, Mallotus japonicus, Lindera glauca, Euscaphis japonica, Meliosma myriantha, Euryu japonica, Halorrhagis micrantha, Hydeocotyle maritima, H. ramifloru, Chionanthus retusa, Trachelospermum asiaticum var. intermedium and Cymbidium goeringii, The Specific plants which is categorized to the Degree by the Ministry of Environment appeared to 25 taxa; Degree V was 2 species, Degree IV was 15 species, Degree III was 7 species and Degree II was 1 species. The mark evaluated by Degrees of five evaluation unit was 186.

• Korean Journal of Environment and Ecology
• /
• v.11 no.1
• /
• pp.111-125
• /
• 1997

To investigate the climax forest structure and to construct the ecological basic data, forty nine plots were set up and surveyed in Mt. Minjuji, Chungchongpukdo. According to the analysis of classification by TWINSPAN, the community was divided by seven groups of Pinus densiflora-Carpinus laxiflora-Quercus serrata(community I), Q. mongolica-Q. serrata-Platycarya strobilacea(community II), Q. mongolica(community III), Fraxinus mandshurica-Acer mono(community IV), Cornus controversa-F. mandshurica(community V), F. mandshurica-Carpinus cordata(community VI), and F. mandshurica-C. laxiflora(community VII). In the results of the analysis of species structure, similarity, diversity and DBH, except for community I~III, it was founede out broadleaves-mixed-climax forest. Constructed basic data will be applied to sustainable development such as ecotourism, nature trail etc.

• The Korean Journal of Ecology
• /
• v.6 no.4
• /
• pp.237-242
• /
• 1983

This is an investigation on the secondary vegetation and succession in the mixed forests destroyed by the severe crown fires on April 8, 1982. The results are summarized as follows: The floristic compositions in the investigated area are composed of 63 kinds of kinds of vascular plants. The biological type shows $ H-D_1, 4-R_5-e$, which is supposed to make a progress to the $ H-D_1-R_5-e$ type. Dominant species are Spodiopogon sibiricus (100.00)-Carex humilis var. nana (70.52)-Miscanthus sinensis var. purpurascens (61, 06)-Lespedeza maximowiczii (57.53). Lespedexa maximowiczii is prevailing as the dominant species in this area. The species diversity(H) and eveness index(e) show 3.00 and 0.74 respectively, so that the species are various and shows uniform distribution comparatively in these communities. Degree of succession(DS) is 479 in the investigated area, the value of which is comparatively higher than that of Chungcheongbuk-do area at the second year afer fires. After the crown and trunk of trees were scorched by the crown fires, the pine tree (Pinus densiflora) died and the other species could be survivd after sometimes. It some that Quercus serrata. Q. dentata, Maackia amurensis, Lespedez cyrtobotrya, Platycarya strobilacea and Lindera glauca are the fire-resistant plants.

• Journal of the Korean Society of Environmental Restoration Technology
• /
• v.11 no.4
• /
• pp.37-45
• /
• 2008

The vascular plants of the studied area in Nonsan economical forest growing site appeared to be 341 taxa; 81 families, 218 genera, 290 species, 1 subspecies, 42 varieties and 9 forms. Based on the list of Korean endemic plants, 5 taxa existed; Cephalotaxus koreana, Thalictrum actaefolium, Asperula lasiantha, Populus tomentiglandulosa (Planted species), Paulownia coreana (Planted species). Specific plant species by floral region were total 13 taxa; Cirsium setidens in class III, Potentilla dickinsii in class II, Cephalotaxus koreana, Pinus koraiensis (Planted species), Hosta capitata, Juglans mandshurica, Alnus hirsuta, Quercus variabilis, Ulmus parvifolia, Dictamnus dasycarpus, Gwenia biloba var. parviflora, Vaccinium oldhami, Trigonotis icumae in class I. The naturalized plants in this site were 9 families, 19 genera, 20 species, 1 varieties, 21 taxa and naturalization rate was 6.1% of all 341 taxa vascular plants. The communities were classified into Quercus acutissima community, Pinus densiflora community, Quercus variabilis community, Platycarya strobilacea community, Quercus aliena community of natural forests and Pinus rigida community, Metasequoia glyptostroboides community, Larix leptolepis community of artificial forests.

• Korean Journal of Pharmacognosy
• /
• v.44 no.3
• /
• pp.298-304
• /
• 2013

In this study, 64 Korean herbal medicines have been investigated with an in vitro evaluation systems using glycation end products (AGEs) formation inhibitory activity. Of these, 30 herbal medicines ($IC_{50}<50{\mu}g/ml$) were found to have significant AGEs formation inhibitory activity. Of these, four herbal medicines ($IC_{50}<5{\mu}g/ml$) were found to have significant AGEs formation inhibitory activity. Particularly, Cornus controversa (branches and leaves), Acer ginnala (stems and leaves), Platycarya strobilacea (flowers) and Picrasma quassioides (stems), showed more potent inhibitory activity (approximately 17-27 fold) than the positive control aminoguanidine ($IC_{50}=77.04{\mu}g/ml$).