• Korean Journal of Soil Science and Fertilizer
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• v.35 no.4
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• pp.243-252
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• 2002

To develop indicators for soil health evaluation, biological characteristics of native soils from the different parent materials were studied. Survival rate of fluorescent Pseudomonas in soils was the lowest as 0.1% while those of thermophilic Bacillus and alkaliphilic bacteria were over the 90% by the soil drying stress. There was positive relationship between soil microbial biomass and organic carbon exudated from the microbial biomass by the treatment. The average air-drying effect of soils was 39.7% with ranges of 9.7~95.0%. The propagules of mesophilic Bacillus and Gram negative bacteria were increased by the re-wetting of dried soils. Soil pH affected positively to the recovering rate of microbial number. Average recovering rate of microbes was 65.3%, and there was positive relationship between microbial biomass recovery and fluorescent Pseudomonas population.

• Proceedings of the Zoological Society Korea Conference
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• 1994.10a
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• pp.128.1-128
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• 1994

• Proceedings of the Zoological Society Korea Conference
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• 2003.08a
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• pp.19-19
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• 2003

• Korean Journal of Environmental Biology
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• v.22 no.1
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• pp.220-226
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• 2004

The restoration effects in two sorts of forests created and managed on the bases of ecological principles in Sihwa industrial complex and Mt. Surak respectively were evaluated in both viewpoints of species composition and diversity. Species composition of the forests created based on the ecological design was move similar to that of the natural forests compared wit h the forests constructed by applying the landscape architectural method. The increased species diversity in the ecologically created forest reflected the effect as well. Black locust plantation managed by applying the ecological principle showed move similar species composition to the surrounding natural forest than the forest left without any management. Furthermore, the former forest showed higher species diversity than the latter one. The methods, which create and manage a forest based on ecological principles, revealed several problems, such as lack of specialty of project operators and inspecting officers, construction regulations without the ecological background, absence of the endemic young trees to be introduced in diverse natural environment, etc. Preparation of guidance for ecological planting and systematic environmental education including revision of construction regulation were recommended as the measures to solve such problems.

• Korean Journal of Ecology and Environment
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• v.56 no.3
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• pp.229-241
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• 2023

Microphysogobio rapidus is designated as endangered species class I by Ministry of Environment, and its distribution and population have been gradually declining, and it is now limited to the Nam River and some tributary streams of the Nakdong River Watershed. For the restoration of this highly endangered species, it is important to identify the causes of the decline and establish appropriate restoration plans. However, due to lack of basic data and ecological research, most steps are stagnant. Therefore, in this study, we identified the differences in the physical, biological, and sociological habitats between current and past distributed sites through field surveys and literature reviews. As a result of the field survey, there were differences in conductivity between the current and past distributed sites, and fish communities were also showed differences. The literature data also showed that the physico-chemical values of the past distributed sites were generally unfavorable, which generated negative consequences on biological factors. In particular, the effects of urbanization were found to be a major factor affecting the habitat of M. rapidus. Habitat stabilization is crucial for the recovery of this endangered species. However, in the past distributed sites, disturbances such as stream development and weir construction have altered streams physico-chemically and result in changes of M. rapidus. Therefore, a comprehensive plan that considers both stream connectivity and water quality is needed to manage and restore the habitat of M. rapidus.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2011.10a
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• pp.359-360
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• 2011

• Broadcasting and Media Magazine
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• v.18 no.3
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• pp.95-108
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• 2013

디지털 홀로그래픽 현미경이나 정량적 위상 현미경(quantitative phase microscopy)과 같은 기존의 간섭현미경은 3차원 이미징 기술로 분류되는데, 이는 획득한 이미지의 복소장(complex field)을 계산을 통해 다른 깊이로 전파시킬 수 있기 때문이다. 그러나 엄밀한 의미에서는 하나의 복소장 이미지는 단지 2차원 맵이기 때문에 근본적으로는 샘플의 2차원 정보만을 가지고, 물체의 3차원 구조의 일부분을 측정하는 것에 지나지 않는다. 본 논문에서는 1969년에 Wolf가 제안한[1,2] 홀로그래픽 회절 토모그래피(Optical Diffraction Tomography: ODT)를 실험적으로 구현한 3차원 위상 현미경(Tomographic Phase Microscopy: TPM)을 소개하고자 한다. TPM은 샘플을 다양한 각도로 조명하여 서로 다른 입사각에 대해 복소장 이미지를 얻고, ODT를 통해서 샘플의 3차원 구조를 복원해내는 기술이다. 보다 구체적으로는 다양하고 독립적인 2차원 이미지들을 샘플의 3차원 푸리에 공간에 맵핑함으로써 샘플 단면의 흡수율과 굴절률을 복원할 수 있다. 굴절률은 분자 농도와 비례하기 때문에, 살아있는 세포에 대한 굴절률의 3차원 맵을 얻을 수 있으면 세포 내부의 분자 구성을 연구할 수 있고, 이를 통해 다양한 생의학적 응용을 연구할 수 있다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.146-147
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• 2003

우리나라에서의 환경 오염 관리는 BOD, COD를 비롯한 총 20여가지 항목에 대한 이화학적 분석에 기초를 두고 있기때문에 분석 항목에 포함되지 않는 물질에 의한 독성의 영향은 간과되고 있다. 선진국에서는 이러한 한계점을 극복하기 위해 이화학적 분석기법 이외에 생물검정법을 이용하여 유해화학물질에 대한 독성 판별, 수질환경기준, 퇴적물환경기준, 오염진단과 생태계위해도 평가, 오염정화와 환경복원 등에 활용하고 있다. (중략)

• Clinics in Shoulder and Elbow
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• v.11 no.2
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• pp.82-89
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• 2008

Ideal rotator cuff repair is to maintain high fixation strength and minimize gap formation for optimizing the environment of biologic healing of tendon to bone. Among the current repair techniques, the suture bridge technique is superior to single- or double-row repair in ultimate load to failure, gap formation, restoring anatomical footprint and achieving pressurized contact area. The suture bridge technique also minimizes gap formation and has rotational and torsional resistances allowing early rehabilitation. However, despite superior biomechanical characteristics of the suture bridge technique, there is no evidence that these mechanical advantages result in better clinical outcomes. Furthermore, there is no difference in failure rates between the double-row repair and suture bridge techniques. An appropriate repair technique should be determined based on tear size and pattern and tendon quality.

• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.139-139
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• 2018

국내 하천은 산업화와 도시화로 인하여 하천수가 오염되고, 치수를 위한 인공적, 획일적인 하천개수가 보편화 되었다. 그 결과 본래 하천이 가지고 있던 생물서식처 기능과 자정, 친수 기능 등 하천환경 기능이 점차 상실되었고, 하천형태도 변형되었다. 이와 같은 자연적인 변화와 더불어 준설, 수리구조물 설치 등 인위적인 변화에 의하여 흐름 및 유사이송 양상이 바뀌어 하상변동이 초래되기도 한다. 하상변동은 하천 시설물의 안정, 홍수위 및 지하수위 변화, 하천부지의 변화 등 하천관리에 중대한 영향을 미치고, 또한 수생태계의 서식환경에 영향을 미치기 때문에 하천을 복원하는데 있어 중요한 고려사항이 된다. 본 연구의 목적은 청미천 복원 사업 구간에 대하여 장기하상변동 모의를 수행하고 하도 안정성을 평가하는 것이다. 이를 위하여 구하도 복원구간에서 새롭게 수행된 측량데이터를 토대로 지형자료를 구축하였으며, 2차원 하상변동 모의가 가능한 CCHE2D 모형을 이용하여 장기하상변동 모의를 실시하였다. 또한 구하도 복원의 하천지형학적 영향을 평가하기 위하여 구하도를 복원하지 않았을 경우의 시나리오를 도입하여 비교하고 그 결과를 분석하였다.