• Journal of Korean Society of Forest Science
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• v.109 no.2
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• pp.189-194
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• 2020

Daphne pseudomezereum var. koreana is native to Korea and is distributedin Kangwon-do, Jeollabuk do, and Gyeongsang-do. This economically valuable species has experienced a dramatic decrease in natural habitat due to climate change and is difficult to cultivate. In this study, we investigate a mass propagation method for D. pseudomezereum through in vitro culture and genetic resource preservation.WPM medium was better than the MS medium for shoot growth. As a result, we compared the shoot number and length of apical (W/AP) and non-apical shoots (W0/AP) with BA and GA₃ treatments in WPM medium. Their shoots and length grew well in both BA 8ìM + GA₃8ìM-treated apical shoot and without-apical shoot. NAA did not effectively induce rooting of the in vitro plantlet.

• Journal of Convergence for Information Technology
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• v.10 no.11
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• pp.272-278
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• 2020

This study was conducted to confirm the component and efficacy evaluation of Buxus Koreana by different part. Leaf, stem, root, and fruit were extracted with 70% ethanol, and the contents of polyphenols and flavonoids were analyzed, and the efficacy against anti-inflammatory, moisturizing and wrinkles were confirmed. The contents of polyphenols and flavonoids of B. Koreana were the highest in fruit extracts at 77.32 and 51.91 mg/g, respectively. As a result of confirming the NO production inhibitory effect, the root extracts showed an inhibitory effect of 29.6%, and iNOS significantly decreased as the concentration of the extracts increased compared to the LPS treatment group. As a result of checking the mRNA expression level of MMP1, it was found to be effective in the root and stem extracts. Through the efficacy evaluation of B. Koreana the possibility of use as a cosmetic material was confirmed.

• Journal of the Korean Society for Library and Information Science
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• v.45 no.2
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• pp.75-96
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• 2011

This research investigated the facts about the place and date of praying for the engraving of the first edition of Tripitaka Koreana. Major findings are as follows: 1) The very first idea of engraving the first edition of Tripitaka Koreana was evidenced in the record of 'The beginning of Tripitaka Koreana' from 'Daejanggakpan Gunsin Gigomun' written by YiGyuBo. 2) After comparing the contents of 'Daejanggakpan Gunsin Gigomun' with the record of the third volume of 'Goryeosa Jeolyo' dated February 13, 1011, this researcher confirmed that 'Daejanggakpan Gunsin Gigomun' also recorded this historical fact. 3) In the third volume of 'Goryeosa Jeolyo' dated February 13th, 1011, it is documented that a ritual was held to pray to the gods of heaven and earth for expelling the Kitan from the country. Further, the document states that this particular ritual consisted of a ceremony of lanterns held at the temporary palace in Cheongju on February 15th, to report to the gods on 'the engraving of the first edition of Tripitaka Koreana' 4) Therefore, it is verified that the date of praying for the engraving of the first edition of Tripitaka Koreana was February 15th of the lunar calendar, 1011(the second year of King Hyunjong's reign), and the place was the temporary palace in Cheongju.

• Korean Journal of Breeding Science
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• v.40 no.4
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• pp.371-376
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• 2008

For the purpose of breeding a high-yield superior variety of Korean raisin tree (Hovenia dulcis var. koreana Nakai), whose value as an edible and medicinal resource is increasing, tree candidates for superior individuals were selected from its 11 habitats in Korea from 1996 to 1998. A clone bank preserve was created in 1998 with 70 clones proliferated by grafting; the fruition traits (e.g., the number of fructified laterals, the average number of bunches per fructified lateral, the average number of bunches per fruiting lateral, the fruitpetiole weight per individual, and the yield per individual) of 47 clones that had bloomed and borne fruit were investigated and analyzed in 2002; five upper-ranking clones whose yield per individual exhibited a 261% improvement against the total average were picked in 2005; and three clones, including 'Poong-Sung 1', that showed a difference in their fruit petiole ripening stage, were finally selected in 2007 as high-yield new cultivars of Korean raisin tree.

• 한국생물공학회:학술대회논문집
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• 2003.10a
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• pp.521-524
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• 2003

An effective purification method was developed for producing Homoharringtonine (HHT), to guarantee high purity and yield from Cephalotaxus koreana. This process was a simple and efficient procedure, for the isolation and purification of HHT form the biomass of Cephalotaxus koreana, consisting of extract, adsorbent treatment, precipitation and followed by a chromatography. The extraction, adsorbent treatment and precipitation in pre-purification process allows for rapid and efficient separation of HHT from many compound and dramatically increases the yield and purity of crude HHT for HPLC purification steps compared to alternative processes. This purification processes serves to minimize solvent usage, size, and complexity of the operations for HHT purification.

• The Korean Journal of Ecology
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• v.20 no.4
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• pp.293-298
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• 1997

The floristic composition of the Korean-fir(Abies koreana Wilson) forest on Mt. Halla in Cheju Island, Korea, was described and some other phytosociological features were noted. The dense tree layer of the Abies koreana forest under consideration attained a height of no more than 5-7m. The shrub layer was 1.2-2m high and usually inconspicuous, while the herb layer, 0.3-0.5m high, was remarkable. The forest contained a number of species which are characteristic of the subalopine coniferous in Japan, particularly that in Hokkaido. Moreover, the specific synchronized regeneration called wave-regeneration was found in the forest on Mt. Halla at several sites even though the data on this phenomenon do not present in the present report.

• Journal of Korean Society of Forest Science
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• v.103 no.1
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• pp.59-64
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• 2014

This study describes analysis of genetic diversity and spatial genetic structure of Korean poplar (Populus koreana Rehder) in Mt. Odae using I-SSR markers. P. koreana is a deciduous broad-leaved tree species that primarily grows in the alpine valleys of China, Russia and North Korea. In South Korea, P. koreana is found limitedly in Gangwon province. Especially, the population in Mt. Odae is located on the southern limit line, its importance is emphasized from the genetic resource conservation perspective. The Shannon's diversity (I=0.230) and the expected heterozygosity (He=0.151) were relatively low as compared with those of other plant species. Spatial autocorrelation analysis using Tanimoto's distance showed that the genetic patch was founded within 400 m. It is suggested that individual trees for ex situ conservation should be sampled with a minimum distance of 400 m between trees.

• Journal of Life Science
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• v.33 no.11
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• pp.936-943
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• 2023

This study was conducted to investigate the potential of Stewartia koreana as anti-microbial materials. The branches, stems and leaves of S. koreana were extracted into 70% ethanol and their antibacterial activity against P. aeruginosa was confirmed. The leaf, branch and stems extracts (1 mg/disc) showed the antibacterial activity against P. aeruginosa and leaf extracts showed higher antibacterial activities than those from branch extracts. The MIC against P. aeruginosa was 0.8 mg/ml and showed bacteriostatic action. The inhibitory effects of extract on biofilm formation and gene expression related to biofilm formation of P. aeruginosa was determined by biofilm biomass staining, SEM and qRT-PCR analysis. The biofilm biomass and cell growth of P. aeruginosa in the cultures treated with 0.2~2.0 mg/ml of S. koreana leaf extracts were significantly decreased in a concentration-dependent manner. We observed that the extract had an inhibitory effect on the formation of P. aeruginosa biofilms at concentrations of 0.8 mg/ml by SEM. qRT-PCR analysis showed that the lasI and rh1I gene expression associated to quorum sensing (QS) in the cultures treated with 0.2~2.0 mg/ml of S. koreana leaf extracts were suppressed in a concentration-dependent manner. Based on the above results, it can be concluded that S. koreana leaf extracts can be used as anti-microbial material derived from natural materials, as demonstrated by the antibacterial action and inhibition of biofilm formation of P. aeruginosa by QS inhibition.

• Korean Journal of Food Science and Technology
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• v.31 no.1
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• pp.260-262
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• 1999

Abies koreana Wilson is a proper tree to Korea. We tested the antimicrobial activity of the lignans isolated from it. The lignans inhibited the growth of Klebsiella pneumoniae and Vibrio parahaemolyticus at the concentration of $10^3\;ppm\;and\;10^4\;ppm$. Especially, the compound V showed higher inhibition activity to Vibrio parahaemolyticus by 1.7 times compared with the control. The compound III showed activity of 36% of the control to Klebsiella pneumoniae. The compounds II and VI had the high growth inhibition activity of 48, 66% respectively to Vibrio parahaemolyticus.

• Journal of Environmental Science International
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• v.30 no.2
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• pp.119-133
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• 2021

The purpose of this study was to provide basic information for rational management plans for sustainable conservation and utilization by comprehensive analyzing the flora distributed in Yongchu valley, Changwon-si. The flora of Yongchu valley were summarized as 319 taxa including 93 families, 212 genera, 285 species, 3 subspecies, 6 forms and 25 varieties. The endemic plants were 5 taxa such as Chrysosplenium pilosum var. fulvum, Impatiens koreana, Lespedeza maritima, Thalictrum acteifolium and Weigela subsessilis. The rare plants were 11 taxa including I. koreana, Prunus yedoensis and Magnolia kobus. The specific plants by floristic region were 38 taxa including I. koreana, Jeffersonia dubia., M. kobus and P. yedoensis which are class V. The naturalized plants were 11 taxa including Solanum americanum, Aster pilosus, Crassocephalum crepidioides and Cerastium glomeratum and so forth and invasive alien plants among these plants was 1 taxa of A. pilosus. The target plants adaptable to climate change were 8 taxa including Corydalis turtschaninovii of northern plant, I. koreana of endemic plant, and Meliosma myriantha of southern plant.