• Journal of Korean Ophthalmic Optics Society
• /
• v.10 no.4
• /
• pp.365-373
• /
• 2005

Antioxidative activities of methanol extracts of 7 natural products which have been orientally used or studied as ophthalmic drugs were investigated. All of 7 extracts assayed - Rubus coreanus, Dendrobium monile, Eriocaulon sieboldianum, Ligustrum japonicum, Cassia tora, Cicadae Periostacum and Polygonatum odoratum var pluriflorum had some electron-donating ability to OPPH radicals, in which R. coreanus and D. monile showed strong activity as similar as ascorbic acid or BHT. At the concentration of $200{\mu}g/m{\ell}$, methanol extract of L. japonicum showed superoxide dismutase-like activity the same as 0.1 mM ascorbic acid and methanol extract of R. coreanus inhibited effectively the production of ABTS radical produced by $H_2O_2$. Furthermore, methanol extract of C. tora showed the highest nitrite scavenging ability. The inherent antioxidative activities of these natural products appear to be responsible for its ophthalmic effects.

• Journal of Environmental Science International
• /
• v.12 no.12
• /
• pp.1227-1233
• /
• 2003

To investigate the flora of wetland at Mt. II-Kwang, the helophyte of the mountain was examined. The flora observed was classified into 2 phyla, 15 families, 27 genera, and 34 species. Representative species at the wetland were Drosera rotundifolia, Utricularia racemosa, Utricularia bifida, Eriocaulon miquelianum, and Eleocharis attenuata var. laeviseta. In the lower part of the wetland, water was abundant and soil surface layer was thin, and Eriocaulon miquelianum-Carex canescens-Drosera rotundifolia, community were developed. On the other hand, in the upper part of the wetland, water was not abundant and soil surface layer was thick, and Agrostis clavata-Phragmiles japonica community were community were developed. Utricularia bifida and Utricularia yakusimensis were growing abundantly at this wetland, but Utricularia racemasa was few in number and narrow in the distribution area. Eriocaulon miquelianum, a Korean endemic plant, was observed, and Habenaria linearifolia, Spiranthes amoena, and Epipactis thunbergii, the CITES plant, were observed at this wetland. Insectivorous plant such as Drosera rotundifolia, Utricularia racemosa, Utricularia bifida, and Utricularia yakusimensis were also observed.

• Journal of Korean Library and Information Science Society
• /
• v.50 no.3
• /
• pp.167-190
• /
• 2019

This study developed and applied Biblio-counseling program based on Alfred Adler's individual psychology targeting upper elementary school students who are in transitional stage of physical and psychological development and examined the effect of the program on the children's sense of inferiority, social interest, personality priority. The program was applied to 20 fourth and fifth graders enrolled in K Elementary School located in S City, Gyeonggi-do Province who were evenly divided into experimental group and control group who was applied for a total of 12 sessions. Main results of this study can be summarized as follows. First, in an analysis regarding the analysis result, the sense of inferiority,the social interest and personality priority showed a statistically significant difference between the two groups. Second, the Biblio-counseling program based on individual psychology had positive impact on the subjective response of the upper elementary school students. And students' interest in books and reading books improved.

• Korean Journal of Weed Science
• /
• v.10 no.4
• /
• pp.269-276
• /
• 1990

Weed species belonging to the broadleaf family prevailed in the experimental sites followed by Cyperucea and grass family. In terms of life cycle, the dominant weed species were the perennial weeds rather than annual weeds. Most of weeds were emerged between 30-60days after transplanting in Chuncheon and between 40-60 days after transplanting in Hongcheon and Hoengseong areas. Among agronomic characteristics of rice affected by weed emergence were decrease of plant height by 2-4㎝, panicle number by 1.3-2.9, spkelet by 3. 7-7.5, ripening rates by 3.3-6.5%, and milled yield by 12-17%.

• Korean Journal of Weed Science
• /
• v.10 no.2
• /
• pp.83-92
• /
• 1990

Experiment was conducted to establish the weed control system on the paddy fields by investigating species, period and amount of weeds in Gangwon province. Four locations were selected for these experiments : West plain area, Chunchon(74m above the sea level), mid-mountainous area, Hongchon(300 m), high alpine area, Hoengsong(450m), and east sea area, Myungju(14m). Weed emergence was investigated 6 times from 10 days after transplanting to 60 days with 10 days interval. From the experiments stated above, the results were summarized as follows ; The identity of weed species was small in grass family, but broad-leaf family was numerous. Also the dominant weed species was generally the perenial weeds. The weed emergence was initiated from 10 days after translanting. The amounts of weed counted the most in Chunchon. A large number of weeds were emerged between 30-60 days after transplanting in Chunchon and between 40-60 days after transplanting in Hongchon and Hoengsong. Among agronomic characteristics affected by weed emergence during rice development, plant height was decreased by 2~4cm, panicle number by 1.3~2.9, spikelet by 3.7~7.5, ripening rates 3.3~6.5%, and milled yield by 12~17%, respectively.