• Clean Technology
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• v.21 no.4
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• pp.257-264
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• 2015

Conventional physicochemical technologies for algae growth inhibition have economical and environmental pollution problems. This study attempted to overcome the problems by nature-friendly biological inhibition technology using fibrous carrier. The experimental results showed that the most effective carrier material, polyester, exhibited the highest biofilm thickness. The removal efficiency for nutrient salts, such as nitrogen and phosphorous, and algae growth inhibition of polyester carrier was 14.59%, 6.36%, and 77%, respectively, which is higher than for control group. These result indicate that the polyester carrier is available in eutrophic lake.

• Journal of Korea Soil Environment Society
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• v.3 no.3
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• pp.45-53
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• 1998

The purpose of this study was to evaluate effects of initial concentration and nutrients in treatment of petroleum hydrocarbon contaminated soils. The reactor used in this study was slurry-phase bioreactor of in-vessel type. Performance results on treatment of diesel fuel contaminated soils and micorbial growth were generated at the bench-scale level. The fate of TPH(Total Petroleum Hydrocarbon) and the microbial growth were evaluated in combination with biodegradation rate. Effect of initial loading levels of 50,000 and 100,000mg TPH/kg soil was studied. Performance results with two reactors were showed at the total TPH removal rate of 90.5% and 90.8%, respectively. However, the reactor with the initial concentration of 50,000mg TPH/kg soil showed higher biological TPH removal efficiency except for removal by volatilization than the other Although the different amount of nutrients was applied in two reactors, there was no remarkable difference in microbial growth rate. However, considerable factor in this results was that applied different initial concentration to two reactors. Although initial concentration was two times higher than it applied to the reactor without addition of nutrients, in total and biological TPH removal rate the reactor with addition of nutrients showed a higher than the other.

• 한국해양학회지
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• v.30 no.5
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• pp.493-511
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• 1995

Analysis of the Late Quaternary benthic foraminifera in the cores from the western part of the East Sea, Korea, indicates several distinct changes in the paleoenvironments during the deposition. The palecology of biofacies of Cores PC-1 from the upper slop and PC-2 from the rise shows several distinct changes in bottom water temperatures during the late Quaternary. The Core PC-4 from the Ulleung Basin generally consists of agglutinated genus, Muiliammina, and anaerobic calcareous genus, Bolivina, in biofacies, suggesting that the anoxic bottom condition was prevailed during the deposition. Benthic foraminiferal rare or barren zones in the Cores indicate the limits of water circulation caused by lower sea-level in the regions during the glacial period through the Late Quaternary. The changes of benthic foraminiferal biofacies reflect temporal and spacial variations in overall bottom environments, such as bottom water temperature, dissolved oxygen, and water circulation pattern. The benthic foraminiferal data can be used to interpret paleoclimatic conditions and predict global sea-level changes, and the results of these studies should be useful to understand the evolutional history of the East Sea through the Late Quaternary.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2002.09a
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• pp.129-133
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• 2002

본 고에서는 지하 대수층 생태계 및 그에 대한 외국의 연구사례를 개괄하여 소개하고, 지속가능한 지하수 개발에 있어서 대수층 생물이 갖는 의미에 대하여 고찰하였다. 아울러 국내에서 발견된 대수층 생물을 소개하고 향후 연구방향을 설정하였다. 지하 대수층은 다양한 생물로 구성된 독특한 생태계를 가지고 있다. 생물학적 평형상태를 유지하는 경우 이 생태계는 대수층이 장기간 양호한 수질을 유지할 수 있는 기능을 가진다. Parabathynellidae, Parastenocaris 및 선충류의 발견을 통해서 고령군 다산면 대수층이 지하수 생태계 연구를 위한 적합한 대상임이 확인되었다. 향후 연구방향으로서 1) 지하수 동물상 조사, 2) 생태계 구성원에 대한 Autecology 및 Synecology적 접근, 3) Bioremediation 및 Bioindicator 관련 연구 등이 제시되었다.

• Proceedings of the Korea Society of Environmental Biology Conference
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• 2002.11a
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• pp.81-106
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• 2002

여름철 광양만의 저서환경 상태를 파악하기 위해서 2001년 6월 광양만의 38개 조사정점에서 대형저서동물의 분포를 조사하였다. 출현한 대형저서동물은 총 154종이었고, 다모류가 출현종수와 개체수에서 가장 우점한 동물분류군이었다. 다모류의 Tharyx sp. (44.8 %), Lumbrineris longifolia (14.0%), 이매패류의 Mytilus edulis (6.5 %), 단각류의 Corophium sinense (4.5 %), 다모류의 Heteromastus filiformis (3.6 %), Sigambra tentaculata (1.7 %) 등이 주요 우점종이었다. 광양만의 묘도 서쪽에 위치한 정점들에서 종수와 개체수가 적었고, 광양만의 주수로역에서 풍부한 생물상을 보였다. 군집분석결과 7개 정점군으로 구분되었으며, 광양만의 서부해역은 종조성이 다양한 군집으로 구성되어 있었다. 저서오염지수(BPI)와 생물계수(BC)에 의한 저서군집의 건강도지수에서는 주수로역의 일부 정점을 제외한 전 정점이 현재 정상적인 상태에 있었지만, 광양만 입구지역에서는 유기물오염에 잘 적응한 다모류의 대량 출현이 있었다.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10b
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• pp.437-439
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• 2000

본 논문은 연층형 생물체의 형태를 인식하는 방법을 제안한다. 고정된 카메라에 제약된 공간상에서 움직이는 생물체를 인식하기 위하여 다음과 같은 과정을 거친다. 먼저 배경 영상을 추출한 후 배경 영상과 현재 영상의 차영상을 통하여 물체의 이진화 영상을 생성하여 세선화 작업을 거친 후 마지막으로 변환된 이미지에서 대표점을 추출하여 패턴 생성기의 입력 데이터로 사용한다. 생물체의 형태 인식 방법은 문자 인식 방법과 몇 가지 차이점을 가지는데 문자의 경우 'q'와 'b'가 다르게 인식되지만 생물체의 경우 이 두 형태는 단지 하나의 형태가 회전한 결과이므로 두 형태를 동일하게 인식해야 한다. 그러므로 패턴 생성을 위한 입력 데이터도 다른 형태를 띄게 된다. 본 논문에서 제안한 방법은 지렁이, 뱀 등과 같은 물체의 행동 분석을 하기 위한 기초 데이터를 생성하는 좋은 방법이 될 수 있다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.11a
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• pp.279-280
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• 2003

지구상의 대기환경 중에 가스상의 형태로 존재하는 황화합물은 크게 두 가지 유형으로 분류된다. 인류의 산업활동과 같은 여러 유형의 인위적 배출원을 통해 배출되는 황화합물의 절대적인 부분을 차지하며 가스상 산화물의 형태로 존재하는 이산화황과 같은 성분은 인위적 기원의 황성분을 대표한다 (Spiro et al., 1992). 그런데 이들과 달리 자연적인 조건에서 생물활동의 결과로 지구의 대기환경 중으로 유입되는 황화합물들은 그 종류가 다양할 뿐 아니라, 산화도가 낮은 환원황화합물 (reduced sulfur compounds)의 형태로 존재한다. (Andreae, 1990). (중략)

• Journal of Soil and Groundwater Environment
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• v.8 no.2
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• pp.44-54
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• 2003

A kinetic model for evaluating effects of surfactant on the biodegradation of HOC(hazardous organic chemicals) in soil-slurry systems was developed. The model includes the partition of HOC and surfactant, the dissolved-, micellar-, and sorbed-phase biodegradation, the enhanced solubilization of HOC by surfactant addition, and the mass transfer of HOC. Phenanthrene as HOC and Trition X-100, Tergitol NP-10, Igepal CA-720, and Brij 30 were used in the model simulations. The biodegradation rate was increased even with a small micellera-phase bioavailability. The biodegradation was not greatly enhanced due to decreased aqueous HOC concentration by increasing surfactant dose in both cases with and without micellar-phase bioavailability. The effect of sorbed-phase biodegradation on total biodegradation rate was not highly important compared to aqueous- and micellar-phase biodegradation. The model can be applied for surfactant screening and optimal design of surfactant-based soil bioremediation process.

• Journal of Korean Society of Environmental Engineers
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• v.29 no.9
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• pp.1051-1059
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• 2007

Bioterrorism intends to cause mass casualties and social panic by means of malicious pathogenic microorganisms. Environmental decontamination becomes very important as a follow-up measure if that happens. Conventional methods for decontamination is that aqueous disinfectants are being sprayed for killing or not spreading microorganisms with the purpose of preventing infection. However, these procedures are not enough to perfectly sterilize space or surface inside of building, requiring additional measures such as surface disinfection or gas treatment methods. This article deals with the issues about the present decontamination procedures, global trends, in order to formulate suggestion for advanced environmental decontamination.

• Journal of the Korea Society of Computer and Information
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• v.14 no.6
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• pp.125-134
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• 2009

A biological data acquisition based on web has emerged as a powerful tool for allowing scientists to interactively view entries form different databases, and to navigate from one database to another molecular-biology database links. In this paper, the biological conceptual model is constructed hybrid biological data model to represent interesting entities in the data sources to applying navigation rule property for each biological data source based on four biological data integrating layers to control biological data. When some user's requests for application service are occurred, we can get the data from database and data source via web service. In this paper, we propose a query processing model and execution structure based on integrating data layers that can search information on biological data sources.