• Journal of Korean Society of Forest Science
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• v.96 no.4
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• pp.408-413
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• 2007

The dried bark of Platycarya strobilacea were ground, extracted with 95% EtOH, concentrated, and one of EtOH extracts was fractionated with a series of n-hexane, dichloromethane and another was fractionated with a series of petroleumether, $Et_2O$, ethyl acetate on a separatory funnel. A portion of dichloromethane soluble was chromatographed on a Sephadex LH-20 column ($72.0{\times}5.0cm$) using EtOH-$CHCl_3$ (7:3, v/v) as eluent and A portion of $Et_2O$ soluble was chromatographed on a silica gel column ($42.0{\times}3.5cm$) using $CHCl_3$-MeOH (9:3, v/v) as eluent. The isolated compounds were identified by TLC, $^1H$-, $^{13}C$-NMR, HMBC and EI-MS. Two flavonoids and three flavonoid glycosides were isolated from the bark of P strobilacea. The structures were determined to quercetin (compound 1), myricetin (compound 2) as flavonol compounds and afzelin (compound 3), quercitrin (compound 4), myricitrin (compound 5) as flavonol glycosides, respectively, on the basis of spectrosopic data.

• Microbiology and Biotechnology Letters
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• v.37 no.2
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• pp.170-175
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• 2009

The extract of Platycarya strobilacea is known to possess a wide range of pharmacological activities including anti-inflammatory, anti-fungal, and anti-cancer properties. We have reported that the ethyl acetate fraction of Platycarya strobilacea (PS-ET fraction) has high potential as an antioxidant agent (J. Soc. Cosmet. Scientists Korea 34(4) 275, 2008). In this study, antibacterial activity of the fraction and stability of the cream containing 0.2% PS-ET fraction were investigated for the application to cosmetics. Antibacterial activity of PS-ET fraction against various skin pathogenic bacteria (Propionibacterium acnes, Staphylococcus aureus, and Pityrosporum ovale) was measured by minimum inhibitory concentration (MIC). MIC values of PS-ET fraction on P. acnes, S. aureus, and P. ovale were 0.13%, 0.06% and 0.25%, respectively. The results showed that the antibacterial activity of the fraction was the highest in the S. aureus. For the stability evaluation, pH and viscosity of the cream containing 0.2% PS-ET fraction were measured. The results showed that pH changes of the cream containing PS-ET fraction was lower than the control cream without PS-ET fraction. And the PS-ET fraction could repress the decrease of viscosity of the cream against sunlight treatment. These results suggest that the fraction of Platycarya strobilacea has high potential as bactericide against the skin pathogenic bacteria and could be added to improve the stability of cosmetic products.

• Preventive Nutrition and Food Science
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• v.19 no.3
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• pp.136-144
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• 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. This study was conducted to evaluate the effects of Platycarya strobilacea S. et Z. (PSE) extract on mouse hair growth and to determine the mechanism of action of PSE. PSE was purchased and its antioxidant activities, such as electron donating ability, total polyphenol content, and flavonoid content were tested. Toxicity during topical treatment was determined by the CCK-8 assay, a cell viability test. Fifteen 4-week-old male C57BL/6 mice were assigned to receive one of three treatments: dimethyl sulfoxide (negative control), minoxidil (positive control) or PSE. Test materials were topically applied to the shaved dorsal skin of each mouse daily for 3 weeks. After 21 days, we observed skin tissue hair follicle morphology and length, mast cell number, and stem cell factor (SCF) expression using hematoxylin and eosin (H&E), toluidine blue, and immunohistochemical staining, respectively. Furthermore, the expression of cytokines involved in hair growth [i.e., insulin-like growth factor (IGF)-1, keratinocyte growth factor (KGF), and transforming growth factor (TGF)-${\beta}1$] was determined by PCR. PSE was found to have very high antioxidant activity. The cell viability rate of PSE-treated mice was markedly higher than that of mice in the control group. We also observed an increase in hair follicle length, strong SCF staining, and a decrease in mast cell number in the PSE group. In addition, PSE-treated mice had higher IGF-1 and KGF expression and lower TGF-${\beta}1$ expression than mice in the minoxidil-treated group. These results suggest that topical application of PSE promotes hair growth by intensifying SCF, suppressing mast cell production, and increasing hair growth-promoting cytokine expression.

• Journal of Plant Biology
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• v.1 no.2
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• pp.7-15
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• 1958

1. The author investigated on the flora of Yongzong island especially on the point of view of the sociological studies. 2. The author could distinguish kinds of the plant formtion in this island(1). Seaside plant formation (2). Mountain plant formation. 3. The seaside plant formation could be subdivided as follows: (1). Association of Triglochin maritimum LINNE. (2). Association of Suaeda japonica MAKINO. (3). Association of Scirpus triqueter LINNE. (4) Association of Phragmites prosturatus MAKINO. (5). Association of Zoysia japonica STEUDEL. (6). Association of Zoysia sinica HANCE var. tenuis NAKAI ex YAMAMOTO. (7). Assocation of Carex pumila THUNBERG. (8). Association of Rosa rugosa THUNBERG. (9). Association of Pinus Thunbergii PARLATORE. (1), (2), (3), (4), (5) associations can grow under the high tide, so when the high tide comes they soaked in the sea water. 4. The mountain plant formation can be subdivided as follows: (1). Association of Quercus aliena BLUME and Platycarya strobilacea STEBOLD & ZUCCARINI. (2). Association of Quercus acutissima CARRUTHERS and Platycaryastrobilacea SIEBOLD & ZUCCARINI. (3). Association of Robinia Pseudoeacia LINNE and Platycarya strobilacea SIEBOLD & ZUCCARINI. 5. The plants at the abandoned mine regions are replacing by the association of Robinia Pseudacacia LINNE and Platycarya strobilacea SIEBOLD & ZUCCARINI. 6. Generally I can find that soil which is developed by the seaside plant formation under sea water (when high tide comes, they soaked in the sea water) is over the pH 8.0, so it shows strong alkaline. But the sandy soil behind the tide line shows near the neutral in spite of the same seaside plant formation. In the case of mountain plant formation the soil where they developed show near the pH 6.0, so it is acidity.

• Journal of Conservation Science
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• v.2 no.2 s.2
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• pp.3-14
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• 1993

This study was carried out to identify the species of wooden coffins excavated from ancient kings' tombs of Nakrang and Pro-Three-Kingdoms to the beginning period of the Three Kingdoms, and the private tombs of the middle stage at the Yi dynasty. The species of wooden coffins were identified as three softwoods(Thxus cuspidata, Sciodopitys verticillata, Pinus densiflora) and six hardswoods(Quercus acutissima, Quercus serrata, Zelkova serrata, Platycarya strobilarea, Alnus japonica and Morns spp.). Thxus cuspidata, wooden coffins of Nakrang kings' tombs, is distributed through Korea. However in previous examination it was known as Cunninghania lanceolata, native species in south China. Sciodopitys verticillata used as a wooden coffin of King Muryung's tomb was native to Japan. It was a material evidence proving the cultural exchange between Paekche Kingdoms and Japan in those days. Pinus densiflora was the species of wooden coffins excavated from private tombs in Yi dynasty, which was not found out from Pro-Three-Kingdoms and Three-Kingdoms. Quercus accutissima was used for making a trough shape wooden coffins at Daho-ri ancient tombs and Quercus serrata was used a outer wooden coffin of Nakrang kings' tombs. An adamant iron mongery might be used to manufacturing a trough shape wooden coffin. This indicates that a developed iron-manufacturing technics existed in Korea at that time. Zelkova serrata was used for making wooden coffins of Imdang and Kaya ancient tombs, Chunma and Hwangnam king tombs. Platycarya strobizacea was used for making wooden coffin of Daegok-ri, Alnus japonica for Daho-ri coffins and Morus spp. for Imdang coffins.

• Korean Journal of Environment and Ecology
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• v.11 no.2
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• pp.149-159
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• 1997

Eleven plots(10m*10m) were established in Pinus densiflora forests and analized in with TWINSPAN and DCA techniques, to study the comparison of the structure of plant community by soil depth in Ulsan Grand Park. As a result of this analyusis, the communities were divided into two groups : Community B which have shallow one. Community A showed climatic climax which have proceeded from Pinus densiflora to Quercus variabilis, Castanea crenata, Platycarya strobilacea, and at last to Carpinus laxiflora. Community A showed climatic climax which have proceeded fro, Pimus densiflora to Quercus variabilis, Castanea crenata, Platycarya strobilacea, and at last to carpenus laxiflora. Community B showed edaphic climax in sere of Pinus desiflora. The diffrernce of the growth of tree height was showed significantly between two communities. The sample tree aged 30 in Community A was 8.50m high and the sample tree aged 35 in Community B was 3.80m high. Community A was better than Community B in soil characteristics and species diversity indicies.

• Journal of architectural history
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• v.16 no.1
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• pp.9-28
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• 2007

We investigated the changes in the species of the woods used for Korean ancient and historic architectures, which include prehistoric excavated relics and existing wooden buildings in South Korea. The species data were collected from various sources such as excavation and repair reports, journal papers, and a few unpublished documents. We divided the building Periods as Paleolithic, Neolitic, Bronze Ages, Iron Age/Three Kingdoms, Koryo, Joseon (early, middle, late) and modem periods. In prehistoric periods, hardwoods were major species. Oak (Quercus spp.) woods dominated (94 percent in average); the others (5%) were Juglans mandshurica, Platycarya strobilacea, Castanea crenata, and few softwoods(1%). During Iron Age and Three Kingdom periods, oaks remained as a major species (57%) and others Platycarya strobilacea(21%), Castanea crenata(13%), and Pinus spp. (6%). The oak woods decreased in Koryo period and they occupied only 1.1%. Instead of oaks, pine (Pinus spp., 71%) and Zelkova serrata (22%) dominated in Koryo. In early and middle Joseon periods, pine woods (73%) remain as a major species and the others were oaks (14%) and Zelkova serrata (9%). As late Joseon came, the pine woods occupied more than 88%. In the late 19th and early 20th centuries, a few boreal species such as larch (Larix spp.) and spruce (Picea spp.), which grow in cold area, were found. We believe they were transported from northern Korea. The existing buildings in Korea are mainly from Joseon period and a few from late Koryo periods. During these periods, pine woods were used for most buildings. For such reason, pine woods were known as 'representative materials for historic buildings'. but earlier times, broad-leaved trees, i.e., oak and Zelkova woods were major materials. The changes in building materials resulted from both climate and human impacts. The dry climate and disturbed forests induce more pines in the mountains. We also compared the wood qualities of the species and found that Zelkova woods were superior ones and deserved more planting for future demands in the repair for historic buildings.

• Microbiology and Biotechnology Letters
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• v.49 no.3
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• pp.283-288
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• 2021

This study investigated the anticancer activity of methanol extract from Platycarya strobilacea leaf in AGS human gastric cancer cells. We determined the cell viability effect of P. strobilacea using MTS assay. Apoptosis induction and cell cycle arrest were confirmed by fluorescein isothiocyanate and propidium iodide staining using cellometer K2. The mRNA expression levels of the Bcl-2 family were confirmed by reverse transcription-polymerase chain reaction. The cell viability was decreased in a dose-dependent manner treated with different concentrations of P. strobilacea. Total, early, and late apoptotic cells were dramatically increased, and the cell cycle was arrested at the sub-G1 phase. The mRNA expressions of Bcl-2 and Bcl-xL were reduced, whereas pro-apoptotic factors, Bax and Bak, were increased in a dose-dependent manner. These results suggested that P. strobilacea leaf extract induced significant apoptotic activity through an intrinsic mitochondria pathway.

• Korean Journal of Pharmacognosy
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• v.44 no.2
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• pp.168-175
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• 2013

Aldose reductase (AR) plays a central role in the development of the diabetic complications. Eighty one Korean herbal medicines have been investigated for inhibitory activities on AR. Among them, fourteen herbal medicines exhibited a significant inhibitory activity compared with 3,3-tetramethyleneglutaric acid (TMG) as positive control. Particularly, Xanthium strumarium (fruit, whole plant), Ilex cornuta (stem and leaf), Vitex rotundifolia(stem), Sophora flavescens (whole plant), Platycarya stobilacea (flower) showed two times more potent inhibitory activity than 3,3-tetramethyleneglutaric acid (TMG).

• Conservation Science in Museum
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• v.5
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• pp.1-4
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• 2004

While excavating relics in Uksu-dong of Daegu and Oksan-dong of Gyeongsan, 38 units of the earthen kilns used during the Three Kingdom era were discovered. Nine pieces of charcoal were collected for examination from 8 kilns out of 38. The result identified 4 pinus densiflora, 3 Quercus sp. and 1 Platycarya strobilacea Sieb. The remaining 1 tree could not be identified because most of the remaining wood was mixed and tangled with clay.