• The Korean Journal of Food And Nutrition
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• v.29 no.6
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• pp.946-951
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• 2016

In this study, Ilex serrata Thunb was extracted with 70% methanol and concentrated under reduced pressure to measure its total polyphenol contents; furthermore, we examined the effect of electron donating ability of the various extracts. The extract was fractionated using different solvents such as methylene chloride, ethyl acetate, and methanol to investigate total polyphenol contents and electron donating abilities. The total polyphenol contents were $1,058.59{\pm}85.85{\mu}g\;GAE/mL$ in 70% methanol, $297.29{\pm}29.43{\mu}g\;GAE/mL$ in methylene chloride, $313.28{\pm}9.22{\mu}g\;GAE/mL$ in ethyl acetate, and $837.82{\pm}31.16{\mu}g\;GAE/mL$ in methanol. The total polyphenol contents showed significant differences (p<0.05) between the solvents. The electron donating abilities were $72.93{\pm}0.29%$ for 70% methanol extract, $14.02{\pm}2.01%$ for methylene chloride, $24.05{\pm}1.75%$ for ethyl acetate, and $84.08{\pm}1.95%$ for methanol. The electron donating abilities were significantly different (p<0.05) between the solvents. The two portions of Ilex serrata Thunb extracts obtained from methanol showed significantly relevant results in the total polyphenol contents and electron donating ability, which was higher than the original extract.

• Journal of the Korean Institute of Landscape Architecture
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• v.21 no.3
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• pp.99-104
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• 1993

The objectives of this study were investigation of the sutiable propagation method by softwood cuttings of female Ilex serrata, the comparison of sex determination of Ilex serrata after seeding and the fruiting percentage of the Ilex serrata male and female. The results obtained were as follows. 85 percentage of the seed were germinated with three months cold stratification. 35 percentage of female plant were observed after seeding. Cuttings should be rooted on late June using a quick dipping of 1,000ppm IBA solution. The rooting rate of the softwood cuttings treated IBA 1,000pm on June 22 in a closed moist chamber with 50% shade screen was 72.2 percentage. The suitable planting of male and female of Ilex serrata was male one versus female thirteen in a distance of 50 meter.

• Korean Journal of Environment and Ecology
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• v.25 no.4
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• pp.562-572
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• 2011

This study is to examine the environmental characteristics of subpopulations of Ilex crenata var. microphyllla Max. distributed in the east-west slopes of Mt. Halla National Park based on analyzing the factors of environment, vegetation and soil. The result of the TWINSAPN analysis conducted on 56 study plots between the altitudes of 500 m and 1600 m of east-west slopes of Mt. Halla National Park can be divided into five communities-Prunus maximowiczii Rupr., Manshurian fullmoon Maple, Carpinus tschonoskii Max., Daphniphyllum macropodum Miq., Quercus serrata Thunb. ex Murray and Pinus thunbergil Parl. Among these communities, the plot with high importance percentage of the subpopulation of Ilex crenata var. microphyllla Max., is the Carpinus tschonoskii Max.-Daphniphyllum macropodum Miq. included in the altitude of 600m~1200m radius. The dominant species of the upper shrub layer was Carpinus tschonoskii Max.(I.P.: 29.82%) while the dominant species of the canopy layer was Daphniphyllum macropodum Miq.(I.P.: 26.76%). For the understory layer the dominant species was Ilex crenata var. microphyllla Max.. Species diversity index was on the low end with 0.7424, indicating the stably formed climax community of Carpinus tschonoskii Max.. The analysis of soil properties showed high concentrations of organic matters, available phosphate and Ca, Mg, the high importance percentage of the of Ilex crenata var. microphyllla Max. is found in altitude of 600m~800m on the eastern slope and the altitude of 800m~1,000m radius on the west slope. This region is included in the southern part of the cold/hot forest zone, its high importance percentage of Carpinus tschonoskii Max. and low in the species diversity index of 0.7424, and has formed stable climax community of Carpinus tschonoskii Max. in Mt. Halla.

• Journal of the Korean Institute of Landscape Architecture
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• v.49 no.5
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• pp.59-70
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• 2021

This study was to investigate the measurement point of root collar diameter of landscape trees in Korea. It may contribute to avoiding disputes caused by the difference in measurement criteria of root collar diameter of landscape trees between tree growers and constructors. The difference between landscape trees' root collar diameter measurement point was 3.59cm from 6cm underground to the surface and 1.35cm from 0cm to 6cm above ground. The source root collar diameter measurement point difference was larger in the basement than in the ground. The standard deviation of the root collar diameter of the landscape tree was 0.64 from 6cm underground to the surface, and the difference in standard deviation from 0cm to 6cm above ground was 0.16. The difference by measurement point of the root collar diameter was larger in the basement than in the ground. It has been proposed to set the reasonable measurement point of the landscaping tree root collar diameter at the inflection point where the standard deviation of the tree trunk diameter is the smallest in line with the size change of the standard for each root collar diameter measurement point. By tree species, Cornus officinalis Siebold & Zucc. 18cm above the ground, Chionanthus retusus Lindl. & Paxton. 12cm above the ground, Zelkova serrata (Thunb.) Makino. 12cm above the ground, Celtis sinensis Pers. 12cm above the ground, Styrax japonicus Siebold & Zucc. 10 cm above the ground, Cornus officinalis Siebold & Zucc. 10cm above the ground, Acer palmatum Thunb. ex Murray. 6cm above the ground, Ilex rotunda Thunb. 6cm above the ground, Quercus myrsmaefolia Blume. 4cm above the ground, Lagerstroemia indica L. 2cm above the ground The above heights were shown as reasonable measurement points. The difference by landscape tree root collar diameter measurement site showed that the standard deviation was small throughout the tree species, and the reasonable average measurement point with a stable slope of the deviation was 12cm or more on average. It can be said that the reasonable measurement point of the root collar diameter of a landscape tree is set at an average of 12cm above the ground. However, recognizing 30cm, which is a familiar ruler(尺) in traditional practices, is quick, It was recommended to measure at the height of 30cm from the surface for a reasonable measurement point of the root collar diameter of a landscape tree, for the uniformity of measurement standards.