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유종수,Yu,Jong-Su 한국조류학회(藻類) 2003 ALGAE Vol.18 No.4
Algal flora and community structure of benthic marine algae in the subtidal zone, Yeongil Bay area were studied. The number of algal species in the quadrats were identified totally 78: 2 Cyanophyta, 10 Chlorophyta, 19 Phaeophyta, and 47 Rhodophyta. The dominant species based on biomass were Sargassum hornerii, Undaria pinnatifida, and Sargassum thunbergii. Vertical distribution was clear by the representative algae such as, Undaria pinnatifida, Sargassum thunbergii, Sargassum horneri, Corallina spp. in the upper subtidal zone, Undaria pinnatifida, Sargassum horneri, Caulerpa okamurae in the middle zone, and Dictyopteris divaricata in the lower zone.
Ecological Study of the Marine Algal Community at the Coast of Taean Thermal Power Plant, Korea
유종수,김영환,Yu, Jong-Su,Kim, Yeong-Hwan The Korean Society of Phycology 2003 ALGAE Vol.18 No.4
The community structure of benthic marine algae was investigated at Taean Thermal Power Plant and other places around Taean Peninsula, the west coast of Korea. Total of 100 species including 3 Cyanophyta, 14 Chlorophyta, 18 Phaeophyta, and 65 Rhodophyta were identified. The number of species was highest with 78 species at the Power Plant intake, followed by 61 at the discharge, 56 at Bunjeondo, and 50 at Maoe. It was noteworthy that a subtropical species Caulerpa okamurae was collected at the intake in autumn and it was the first observation in the west coast of Korea. The pattern of vertical algal distribution showed Gloiopeltis furcata occurred in the upper intertidal zone, Sargassum thunbergii and Corallina spp. in the middle and lower zone and Enteromorpha spp. in the lower middle zone. These were all dominant species except for Enteromopha spp., which was subdominant species. Other subdominant species were Chondrus ocellatus and Neorhodomela aculeata. The average diversity indices were between 0.70 and 1.20 at each area based on their dry weight. The similarity index was 0.79 between the algal flora of this study and that of 1987, indicating that the condition of the benthic environment remained unchanged since then. This area maintained its environmental quality, so the algal community remained same with similar structure. This study area seemed a suitable place for long term monitoring of the benthic environment where industrial facilities such as a power plant might affect the benthic algal community.
유종수,이인규,이진환 한국생태학회 1997 Journal of Ecology and Environment Vol.20 No.1
Due to its lack of wave action and tide ecosystem in Inchon dock lacks in marine characteristics. Structural condition in the dock is artificially similar to that of lake. The purposes of this study was to clarify the water quality, to provide the basic physicochemical data and tl resolve the causation of ?미 blooming. Samples were obtained monthly from four stations in Inchon dock during January to December, 1991. Water temperature ranged from $2.7^{\circ}C$ to $27.6^{\circ}C$ under the strong influence of air temperature. Salinity varied between 24.7%-30.4% thus being influenced by freshwater discharged from a spring. Dissolved oxygen was concentrated from 0.1-13.92 mg/l and suspended solids were 6.9-231.0 mg/l. The physicochemical factors were similar to those investigated 10 years ago. However, increased concentration of nitrogenous nutrients initiated ?미 blooming and its process was accelerated to reach eutrophication. Algal blooming was proceeded in March and August.
Monitoring of Algal Bloom at Seomjin River Estuary, Southern Coast of Korea
유종수 한국조류학회I 2003 ALGAE Vol.18 No.4
This study was conducted at Seomjin River estuary to identify the causative species of algal bloom and their blooming cycles. Field surveys were conducted at 4 stations in every week from April to December of 1999. Thirty species were observed as the causative species of alga bloom. Skeletonema costatum, Thalassiosira sp., and microflagellate spp. (mixed red tide: Chroomonas sp. and two species of Prasinophycea) made algal blooms during the present study period. In addition, toxic algal species of diatom Pseudo-nitzschia multiseries and dinoflagellate Dinophysis acuminata were observed. The algal blooms were caused by microflagellate spp. in June, Thalassiosira sp. in July and Skeletonema costatum in August. Generally, the algal blooms persisted for about 5 days in this area.
식용식물자원으로부터 활성물질의 탐색-XVII. 싸주아리쑥(Artemisia princeps PAMPANINI, Sajuarissuk) 지상부의 화학성분
유종수,방면호,안은미,송명종,정해곤,정태숙,이경태,최명숙,백남인,Yoo, Jong-Su,Bang, Myun-Ho,Ahn, Eun-Mi,Song, Myoung-Chong,Chung, Hae-Gon,Jeong, Tae-Sook,Lee, Kyung-Tae,Choi, Myung-Sook,Baek, Nam-In 한국응용생명화학회 2007 Applied Biological Chemistry (Appl Biol Chem) Vol.50 No.1
싸주아리쑥 지상부를 80% MeOH 용액으로 추출하고, 얻어진 추출물을 EtOAc, n-BuOH 및 $H_2O$로 용매 분획하였다. 이중 EtOAc 분획으로부터 silica gel과 ODS column chromatography로 정제하여 5개의 화합물을 분리하였다. 각 화합물의 화학구조는 NMR, MS 및 IR 등의 스펙트럼 데이터를 해석하여, friedelin (1), ${\beta}$-amyrin (2), ${\beta}$-amyrin acetate (3), camphanediol (4), hispidulin (5)으로 동정하였다. 이 화합물들은 싸주아리쑥에서는 처음 분리되었다. The aerial parts of Artemisia princeps PAMPANINI were extracted with 80% aqueous MeOH and the concentrated extract was partitioned with EtOAc, n-BuOH and $H_2$O, successively. From the EtOAc fraction, five compounds were isolated through the repeated silica gel and ODS column chromatog-raphies. They were determined as friedelin (1), ${\beta}$-amyrin (2), ${\beta}$-amyrin acetate (3), camphanediol (4) and hispidulin (5) on the basis of spectral data, respectively.