• 한국산림과학회지
• /
• 제96권5호
• /
• pp.585-590
• /
• 2007

Rhizina undulata is the fungus, which causes Rhizina root rot on coniferous trees. Nested-PCR using ITS-specific primer was applied to detect R. undulata from the soils of Japanese black pine (Pinus thunbergil) forests infested with the disease in Seocheon, Chungnam Province, South Korea. Soil samples were collected from four different sites, both dead trees and fruit bodies of R. undulata were present, dead trees only present, fruit bodies only present, and both were absent. Nested-PCR products specific to R. undulata ITS-region were amplified. Positive reactions were found in some samples from the sites, where dead trees and fruit bodies of R. undulata were absent as well as where both of those were present. R. undulata was mainly detected in the soil samples from the depth of 5~20 cm under the soil surface. These results show that the nested-PCR could be used to diagnose the presence or potential infestation of R. undulata in the soils of pine forests.

• 한국농촌건축학회논문집
• /
• 제20권4호
• /
• pp.39-51
• /
• 2018

In order to improve the housing environment and quality of life for the rural elderly, this study aims to identify and present the status of community centers, most widely used by the elderly in rural areas. Through the literature review, type and space elements of community centers were derived and selected three target areas were investigated. As a result of literature analysis, the space type of rural community centers were classified as indoor space and outdoor space. The indoor space types were classified as entry space, public space, sanitary space and the outdoor space were classified as entry space and leisure space. Some community centers were surveyed in Seocheon-gun, Wanju-gun, and Cheongju-city. Results indicate the indoor and outdoor space design and elements were undergoing a lot of inconvenience partly because standard design was considered and the space was not planned for the physical, psychological and social health of the rural elderly. Therefore, this study will be used as a basis for building healthier and more friendly residential environments that can enhance the health and quality of life for the elderly in rural areas.

• 한국물환경학회지
• /
• 제33권2호
• /
• pp.149-159
• /
• 2017

After the artificial barrage was constructed in 1990s, the Geumgang estuary has been experiencing considerable changes in nature as well as in socioeconomic and culture in the vicinity villages. In order to understand how the change of estuarine environment bring about conflicts among the local communities, and resolve the conflicts, the research investigated the causes of the conflicts in the Geumgang estuary using in-depth and semi-structured interview method. 100 local people who have lived in the vicinity of Geumgang estuary for more than 30 years were selected for the interviews. Results of the research shows that local people's jobs determine the opinions about the estuary barrage and the way of estuarine management. Understanding environmental change and local conflicts helps to develop a sustainable and integrated estuary management system in the region.

• 펄프종이기술
• /
• 제42권4호
• /
• pp.78-83
• /
• 2010

In this study, the possibility of the use of a new raw material in paperboard industry was investigated. Fly ash is one of the residues generated in the combustion of coal and generally captured from the chimney of coal-fired power plant. This material is utilized in many industries including cement, soil stabilization, composite etc., but it is not used in paper industry. Three types of fly ashes were collected from Hadong, boryeong and Seocheon steam power plants and we investigated their properties by scanning electron micrographs and particle size distribution. Papers were manufactured with KOCC and fly ashes, and the physical properties such as bulk, tensile strength, internal bond strength and ISO brightness were measured to identify the effects of fly ash on the paper properties.

• 한국환경과학회지
• /
• 제9권2호
• /
• pp.125-129
• /
• 2000

As one of the fundamental survey to evaluate purification capacity of pollutants at the tidal flat sediments, we studied vertical environmental characteristics in three tidal flat sediments, Chunjangdae, Eueunri and Gyewhado. These are dissmilar to external feature in each other. The results of this study may be summarized as followed; As the results of particle analysis, Eueunri tidal flat fediment located in Keum river estuary consists of 98.98% as silt & clay, Chunjangdae tidal flat sediment located in SeocheonGun consists of 97.99% as sand. And Gyewhado tidal flat sediment located in Saemankeum in Saemankeum area consists area consists of 32.81% as silt & clay and 67.19% as sand. The concentration of organic pollutants(I.L., COD, POC, PON) in Eueunri tidal flat sediment which highly content of silt & clay were 3~4 times higher than others. The concentration of organic pollutants at each layer were slightly increase goes with deepen layer. The linear correlation between I.L. and COD, POC, PON were obtained. Correlation coefficients were in range of 0.821~0.940. Also the correlation between pH and COD, POC, PON were high(>r=0.9). Filteration rate in Chunjangdae tidal flat sediment was 0.01584cm/s as mean value, but the other were almost nothing filtered off.

• 지구물리
• /
• 제4권2호
• /
• pp.87-93
• /
• 2001

본 연구는 단일 시료 재현법(SAR protocol)에 따른 충청남도 서천군 남산리 산성 터에서 발굴한 와편에 대하여 연대를 추정하였다. 와편에서 석영을 분리(90 - 150 μm)하여 불산(HF)을 사용하여 표면을 10% 정도 에칭하여 알파선원의 영향을 제거하였다. 와편의 자연축적선량(Paleodose)는 단일 시료 재현법으로 측정하고, 토양과 와편의 연간선량(dose rate)은 ICP 분석으로 계산한 값을 활용하여 와편의 연대를 계산하였다. 광 여기 루미네선스 연대 측정 결과 와편 6개의 자연축적선량과 연간선량을 이용하여 연대를 추정하면 (733 ± 50)AD에서 (1160 ± 50)AD 사이의 것으로 추정되며, 오차의 범위는 10% 이내로 나타났다.

• 한국전산유체공학회지
• /
• 제18권1호
• /
• pp.69-76
• /
• 2013

To reduce the damage from the coastal disaster such as typhoon and tsunami, a possible option is the eco-friendly approach to minimize the destruction of ecological system. One of feasible idea is the forest for damage prevention artificially arranged along the beach. To understand a precise physics on the flow before and after the forest, we use a CFD method. In this paper, a three-dimensional numerical model has been constructed based on tree cases in a real forest located at Byin-myeon, Seocheon-gun, Chungnam. The CFD computation using a commercial code COMSOL multiphysics is performed for the distribution of real spatial coordinate of each tree. Through this investigation, the CFD techniques are shown to be applied to the research of forest composition plan. The physics in the regime from laminar to turbulent flow is qualitatively explained, and the obtained data are compared one another quantitatively.

• 농촌계획
• /
• 제24권2호
• /
• pp.1-19
• /
• 2018

This study analyzed business ecosystems in 4 case regions(Yeongdong, Seocheon, Sunchang, and Hadong) that carry forward the regional $6^{th}$ industrialization. The analysis aimed to draw implications to build a healthy ecosystem for the sustainable development of the regional $6^{th}$ industrialization. As a result of the analysis, 4 districts show different characteristics for their growth stages, and these results provide implications for policy directions for the development of the regional industry. The following basic direction was set for the sustainable regional $6^{th}$ industrialization based on the healthy ecosystem. First, policy support should be differentiated by considering each region's growth stage. Second, to improve the regional innovation capacity, it is needed to lay the foundation continually and strengthen diverse support for it. Third, a stronger and efficient implementation system is necessary for the regional $6^{th}$ industrialization.

• 수산해양기술연구
• /
• 제47권2호
• /
• pp.88-98
• /
• 2011

Experimental fishing was carried out to compare the catches of main species and bycatch according to the codend mesh size (raschel, 15mm, 25mm, 35mm, 45mm) of stow net on anchor in the coastal waters of Seocheon after manufacturing five kinds of fishing gears and commercial fishing boat (7.93 tons) was used for it. Anchovy (Engraulis japonicus), southern rough shrimp (Trachysalambria curvirostris), beka squid (Loligo beka), cuttle fish (Sepia esculenta), swimming crab (Portunus trituberculatus) were dominant on the five kinds of experimental fishing gears. Southern rough shrimp was caught from all kinds of fishing gears and catches of anchovy was highest in the raschel codend, southern rough shrimp for 15mm, 25mm, 35mm codend and beka squid for 45mm codend. Bycatch proportion against total catches was 623,376g (28.7%) for 2,171,844g in raschel, 11,932g (1.7%) for 704,451g in 15mm, 3,616g (1.6%) for 221,432g in 25mm, 9,276g (4.9%) for 191,052g in 35mm and 2,724g (5.3%) for 51,431g in 45mm.

• Parasites, Hosts and Diseases
• /
• 제58권1호
• /
• pp.81-86
• /
• 2020

Trematode specimens were collected from the intestine of a herring gull, Larus argentatus, which was found in a critical condition on the shore of a small island (Yubu-do, Seocheon-gun, Chungcheongnam-do) located at the western coast of the Korean peninsula. Total 11 specimens of intestinal flukes, including 3 Cryptocotyle lingua (Heterophyidae), 1 Himasthla alincia (Echinostomatidae), 5 Cardiocephaloides medioconiger (Strigeidae), and 2 Diplostomum spathaceum (Diplostomidae), were recovered. C. lingua was morphologically characterized by the presence of a large ventrogenital apparatus and 2 obliquely tandem testes. H. alincia had an elongated body and a head collar equipped with 31 collar spines. C. medioconiger had a bisegmented body and a voluminous copulatory bursa containing the seminal vesicle and ejaculatory duct. D. spathaceum also had a bisegmented body and its vitellaria extended up to the anterior border of the tribocytic organ. It is of note that C. lingua is potentially zoonotic that can occur in birds and humans. Three of them, i.e., C. lingua, C. medioconiger, and D. spathaceum, are new trematode fauna in Korea. Studies on trematode fauna of migratory birds should be continued in Korea.