• Natural Product Sciences
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• 제18권2호
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• pp.137-140
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• 2012

The aim of this research was to investigate the industrial application of Zanthoxylum schinifolium. Antibacterial activities of the n-hexane, methylene chloride (MC), ethyl acetate, and butanol fractions of Z. schinifolium were tested against Escherichia coli, Staphylococcus aureus and Helicobacter pylori. Among the fractions, the n-hexane and MC fractions showed the stronger antibacterial activity against H. pylori, with an inhibition zone greater than 10 mm in disc assays. Further testing of bergapten and lupeol from the MC fraction of Z. schinifolium revealed the antibacterial effects against E. coli, S. aureus and H. pylori, suggesting their potential use as antibacterial agents.

• 환경영향평가
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• 제11권4호
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• pp.259-269
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• 2002

보전전략은 규모가 큰 지역을 설정하여야 하는 데 그 이유는 광역보전지역은 다양한 생물지리학적인 분포를 포함할 수 있기 때문이다. 이런 관점에서 본 보고서는 우리 나라의 다섯 개의 중요한 생태계에 대하여 기술하였다. 다섯 개의 생태계는 산림생태계, 담수생태계, 연안 및 해양 생태계와 도서생태계 그리고 비무장지대생태계이다. 각각의 생태계 보전전략에 대해 물리적인 측면과 생물지리적 측면에서 기술되었으며 생태계 보전방안은 생태계의 기능과 가치뿐만 아니라 자연시스템을 유지하고 복원하는 데 매우 유리하다. 생태계 보전을 위해 1) 지역주민에게 인센티브를 제공하고, 2) 연구와 교육 및 홍보의 기능을 강화하며, 3) 지역정보와 기술을 상호 교환하고, 4) 국제협력 증진을 도모, 5) 보전지역을 조성하기 위한 예산확보를 제안하였다.

• 한국환경복원기술학회지
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• 제17권1호
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• pp.185-201
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• 2014

The Yong-neup of Mt. Daeam, which was designated as Korea's National Monument No.246 in 1973, is a high moor, and it has been managed with the designation as an ecosystem conservation area, Ramsar wetlands, and wetland conservation area. With the closing of the officially announced 5-year period for 'No-Trespassing' on the ecosystem conservation area starting August, 2010, it becomes necessary to arrange a systematic management and conservation scheme in consideration of the access & use of the visitors and Yong-neup's potential change into land consequent on making it open to the public. This study thinks that in order to preserve the Yong-neup, it's necessary to prepare the conservation plan for the program operation for exterminating exotic species, development of replacement wetlands and nurseries, access limit through zone categorization, establishment of environment-monitoring system, institutional management support, and establishment of managing facilities, etc., and to make scientific approaches, such as survey on wetland ecosystem, establishment of inventories, wetland monitoring, and drawing up of wetland ecology maps, etc. In addition, it is required that there should be adequate considerations of restoration of slope faces, drains, artificial embankment, water-collecting wells, roads for military operations, and wild-boar-stricken areas, etc., and should be continuous and systematic management of Yong-neup through the wise use of residents' participation-style maintenance, organization of a consultative body, introduction of CEPA programs, and introduction of visiting facilities and alternative transportation system, etc.

• 한국환경생태학회:학술대회논문집
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• 한국환경생태학회 2007년도 정기총회 및 학술논문발표회
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• pp.149-153
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• 2007

• 상하수도학회지
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• 제25권4호
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• pp.535-546
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• 2011

The study area investigated in this research is Hwaseong city, Gyeonggi-Do where small scale development is currently in progress. For the last three years, we carried out the environmental and ecological assessment by using data from The Ministry of Environment and Han River Basin Environmental Office. Most of development works in Hwaseong city, Gyeonggi-Do are small scale developments which are related with factory and distribution complex based on individual laws and regulations. However, environmental and ecological assessment is not being sufficiently reflected beforehand. Especially, because the development takes place mainly in the outskirts of the city, the fine forest is continuously being damaged. We analyzed changes in green zone area caused by the developments. As a result, the percentage of original green zone was decreasing while the percentage of artificial green zone was increasing. We should maintain the percentage of the original green zone in order to conserve natural environment. In the past three years, the damage of the DGN (Degree of Green Naturality) 7 area that has high conservative value was little, but, there was serious damage in the area of DGN 6. In order to conserve natural environment, political and institutional investigation should be seriously carried out for mitigation of environmental and ecological damages.

• 한국환경복원기술학회지
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• 제21권1호
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• pp.13-30
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• 2018

In terms of environmental friendly land use and objective environmental assessment, legislative assessment items of Environmental Conservation Value Assessment Map (ECVAM) consists of designated areas related to conservation and protection, and areas that are planned to be designated in the future. However, the gap with the reality due to omission of several protection areas and land use regulations, and assessment grades according to 3 division land use map of forest, agricultural land, and urbanized area, results in low application and utilization of ECVAM. Therefore in this study, the legislative assessment of the ECVAM was performed with new assessment items and its new ratings, to suggest an improvement in legislative assessment items of the ECVAM. As a result, legally protected areas of inhabited islands under absolute conservation, special wildlife protection districts, protected marine areas, environmental preservation sea areas, scenic spots, forest protection zone, traditional temple preservation zone, and 45 zone or district related to regulation of land use were additionally designated as new legislative assessment items. New grade ratings were given to each additional assessment items in consideration of the restrictions on acts. As a result of the legislative assessment based on the new assessment items and new grades, the 1st grade area increased by 3.47%, and the 2nd grade area increased by 19.35%. The 3rd grade area decreased by 8.54%, the 4th grade area increased by 2.95%, and 5th grade increased by 2.91%. In addition, the out-of-grade area decreased by 20.14%, considered to be a realistic assessment based on land use. With the improved legislative assessment, it is possible to provide a more accurate environmental assessment map. Increase usage of ECVAM is expected in providing regulations of land use and base data for integrated land management of land environmental planning.

• 한국안전학회지
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• 제13권1호
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• pp.70-76
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• 1998

The smoke filling process for the atrium space containing a fire source is simulated using two types of deterministic fire models : Zone model and Field model. The zone model used is the CFAST(version 1.6) model developed at the Building and Fire Research Laboratories, NIST in the USA. The field model is a self-developed fire field model based on Computational Fluid Dynamics(CFD) theories. This article is focused on finding out the smoke movement and temperature distribution in atrium space which is cubic in shape. A computational procedure for predicting velocity and temperature distribution in fire-induced flow is based on the solution, in finite volume method and non-staggered grid system, of 3-dimensional equations for the conservation of mass, momentum, energy, species and so forth. The fire model i. e. Zone model and Field model predicted similar results for the clear height and the smoke layer temperature.

• 한국산림과학회지
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• 제111권3호
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• pp.428-434
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• 2022

본 연구는 밀원식물인 아까시나무의 적지적수 조림을 위해 임지생산력을 나타내는 지위지수를 도출하고, 지위지수에 어떠한 입지환경인자가 영향을 미치는 지를 수량화이론 I방법으로 구명하고자 수행되었다. 분석에 사용된 자료는 6차 국가산림자원조사와 1/5,000 산림입지토양도 상의 임령, 우세목 수고 및 각종 입지환경인자였다. 6차 국가산림자원조사에 의한 우리나라 아까시나무 임분의 지위지수는 평균 14였으며, 범위는 8에서 18 사이에 있는 것으로 분석되었다. 그리고 지위지수에 영향하는 입지환경인자는 모암, 기후대, 토양성질, 국소지형과 해발고였으며, 수량화이론 I방법을 적용한 추정모델의 적합도는 33%였다. 이 추정모델의 적합도는 낮으나 1% 수준에서 유의성이 인정되어 지위지수와 입지환경인자 간의 상호 연관성을 설명할 수 있었다. 지위지수와 입지환경인자 간의 수량화 분석 결과, 모암은 변성암, 화성암이, 기후대는 온대중부지역 이상에서, 토성은 식양토, 미사질양토가, 국소지형은 산복 지역에서 높은 점수를 갖는 것으로 나타났다. 임지생산력(지위지수)에 영향하는 입지환경인자 각각의 편상관을 분석한 결과, 산림 내 토양의 성질과 해당 입지의 해발고에 대한 편상관계수가 0.4129, 0.4023으로 각각 나타나, 이들이 가장 영향력이 높은 인자임을 알 수 있었다.

• 한국환경복원기술학회지
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• 제24권1호
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• pp.1-14
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• 2021

The Ministry of Environment of Korea has been releasing Asiatic black bears since 2004 at Jirisan National Park. It exceeded the target number of Asiatic black bears in 2018. As of July 2020, in addition to 67 traceable bears, many Asiatic black bears are dispersed outside Jirisan National Park. Jirisan National Park is a very dense place with more than 3 million visitors every year. In this study, the roads and trails through Jirisan National Park were considered to be the main dispersion factors of Asiatic black bears, and the fragmentation analysis was conducted. As of July 2017, the length of roads and trails in Jirisan National Park was 363.4km. Based on this, Jirisan National Park was fragmented into 163 patches. There is only one place that maintains a single area of more than 50㎢ that is suitable for large mammals to inhabit, and 141 places are less than 5㎢. There are 6 patches of 24 to 200㎢ area suitable for living of large mammals including Asiatic black bears, in Jirisan National Park. Compared to the announcement made by the Korea National Park Service in 2014, activities of Asiatic black bears were rare in areas below 5㎢ area and the frequency of activities was high in more than 20㎢ area. This shows that human activities in protected areas such as national parks can directly affect the activities of wild animals, including Asiatic black bears. Therefore, efforts should be made to improve the habitat of Asiatic black bears by reducing the pressure of visiting for Jirisan National Park. In addition, as a result of analyzing the fragmentation of the park's natural conservation zone 107.7km, 45% of the trail of Jirisan National Park, was opened, which is more fragmentation than other use zones. The park nature conservation zone accounts for about 32% of the total area of Jirisan National Park, but the average patch area is only 2.93㎢ and seven large shelters are located. Therefore the Asiatic black bears are negatively affected. This is the result of inconsistent national park use zone setting and actual park management. In overseas countries, research is active on the negative effects of human activity on ecosystems in protected areas. However, there is a lack of research of that in Korea. Thus, that research is required for protection area management in the future.

• 헤리티지:역사와 과학
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• 제56권4호
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• pp.160-189
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• 2023

천전리 각석은 중생대 백악기 경상누층군의 대구층에 속하는 셰일층준에 새겨져 있다. 이 암석은 열변질 작용을 받아 혼펠스화 되어 경도가 높고 치밀한 조직을 보이며, 조암광물은 석영, 정장석, 사장석, 방해석, 운모, 녹니석 및 불투명 광물들로 동일한 조성을 가지나 풍화대에서는 방해석이 거의 검출되지 않는다. 각석은 일정한 깊이의 풍화대를 형성하고 있으며 풍화대와 비풍화대는 광물조성 및 화학조성의 차이가 있다. 풍화대의 CaO 함량은 비풍화대에 비해 90% 이상 감소하였으며, 이는 방해석이 물과 반응하여 용탈되었기 때문이다. X-선의 투과특성으로 각석 표면의 풍화심도를 산출한 결과, 탈락 및 박리 영역에서는 0.5~1.0mm 정도의 깊이를 보였지만 대부분 영역의 풍화깊이는 3~4mm 정도로 산출되었다. 이는 Ca과 Sr의 함량과 변화로도 입증할 수 있다. 각석의 표면변색은 색의 농도를 달리하며 분포하고, 황갈색 변색은 얇은 생물 피막층과 함께 교호하며 79.6%의 피도를 보인다. 따라서 천전리 각석의 물리화학적 및 생물학적 손상을 효과적으로 제어할 수 있는 주기적인 보존관리와 예방보존 차원의 정밀모니터링이 필요할 것이다.