• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.04a
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• pp.321-322
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• 2000

대기중의 유해 유기오염물질의 배출농도를 규제하는 법규와 표준지침이 제정되어 있으나 시료채취와 분석까지 시간이 많이 걸려 빠른시간내 확인하기엔 어려운 실정이다. 특히 악취성 휘발성 유기물은 오염발생이 순간적으로 일어나 이를 신속하게 규명하지 않으면 원인 규명이 어려운 실정이다. 본 연구에서는 이동형 FT-IR을 사용하여 대기중에 존재하는 유해 유기오염물질의 신속하게 분석할 수 있는 분석법을 확립하고자 하였다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.11a
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• pp.109-111
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• 2000

지금까지 대기침적량의 산정에는 크게 대기중의 오염물질 농도와 침적속도를 이용하여 추정하는 방법 (atmospheric flux methods)과 대리표면을 이용하여 건성침적량을 직접 측정하는 표면분석 방법(surface analysis methods)이 주로 이용되고 있다. 전자는 대기중 오염물질 농도를 관측ㆍ분석함으로써 eddy correlation, aerodynamic gradient methods 등의 미기상학적인 방법이 여기에 해당되며 균일하지 못한 표면이나 중력침강이 주가되는 조대입자에 대해 사용이 제한되는 단점이 있다. 이에 반해 대체표면을 사용하는 방법은 일반적으로 시료채취 및 분석과정에 있어서 통제가 용이하기 때문에 현재 광범위하게 널리 사용되고 있다. (중략)

• Proceedings of the Korean Society of Veterinary Pathology Conference
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• 2002.11a
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• pp.86-105
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• 2002

질병진단에 있어서 부검의 중요성은 두 말할 필요가 없다. 왜냐하면 정확한 진단은 질병의 본질과 병원체의 병리기전(pathogenesis)을 이해함으로써 합리적인 치료와 예방대책을 수립할 수 있다. 특히 최근에는 동물질병과 환경 위해 요소 등 공중위생적인 측면이 상당히 부각되어 사람에게도 영향을 줄 수 있는 인수공통 전염병의 예방을 용이하게 한다. 특히 축산업의 발달에 따라 돼지나 닭의 경우는 개체 진료보다는 집단 단위 (herd 또는 flock)의 위생관리가 중요하기 때문에 질병에 대한 역학적 상황 분석과 부검 진단은 필수 불가결한 과정이다. (중략)

• Proceedings of the Ginseng society Conference
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• 2007.05a
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• pp.15-15
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• 2007

• Journal of the Korean Chemical Society
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• v.46 no.4
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• pp.317-323
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• 2002

The composition of trace materials in domestic circulated LPG are determined. The sampling points are two cylinders of LPG cylinder re-inspection center, six vaporizer of LPG-supplying group facilities, and the compressed oil from one LPG station. In the trace materials from cylinder of LPG cylinder-reinspection center, alkene and diene derivative (No. of carbon ${\leq}9),$ aromatic compounds, and tarry chemicals(No. of carbon ${\geq}10)$ are 1.5~39.9%, 0.7%, 57.8~96.0%, respectively. While in the trace materials from LPG-supplying group facilities and in the oil from LPG station, tarry chemicals(No. of carbon>10) exceed 96.6%. Nine samples are classified into three clusters. One cluster is the sample of SE company cylinder-reinspection center(Euclidian distance between S company LPG cylinder-reinspection center and SE company cylinder-reinspection center=2.11), the other is the sample of SE company LPG cylinder-reinspection center(Euclidian distance between from samples of LPG-supplying group facilities including compressed oil from LPG station=0.110) the third is the samples of LPG-supplying group facilities(Euclidian distances among them<0.075). The compositions of samples from LPG-supplying group facilities are similar to those of oil from LPG station. Furthermore densities of samples from LPG-supplying group facilities and compressed oil in LPG station are 0.873, 0.873 [0.00798 (99% confidence limits) respectively. It was presumed that tarry chemicals had been leached from the compressed oil of LPG supplying facilities.

• Journal of Food Hygiene and Safety
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• v.7 no.1
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• pp.23-28
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• 1992

전남지방의 주요 재배단제에서 채취한 총 16종의 복숭아들에 대한 농약 잔류량 조사하였으며, 이들 복숭아를 수세 및 탈피 그리고 저장하였을 때의 농약 잔류량의 변화를 고찰하고자 하였다. 총 24종의 조사대상 농약중 TPN(Chlotothalonil) 및 Diazinon 그리고 Fenitrothion만이 3지점의 시료에서 검출되었으며 그 잔류량은 보사부에서 설정한 잔류허용기준(Maximum Residue Limits : MRL)에 크게 미달되는 수준이었다. 그러나 이들 시료들을 수세 및 탈피하지 않고 분석한 결과 TPN의 우 MRL을 훨씬 초과한 양이 검출되었는데, Diazinon은 MRL에는 미치니 못하였지만 수세 및 탈피한 시료들보다 높은 수준으로 검출되었다. 수세에 의한 복숭아중의 잔류농약의 경감효과는 TPN의 경우 63.4~66.4% 이었으며 Diazinon은 거의100% 수준이었다. 한편 탈피에 의한 잔류농약의 경감효과는 TPN 및 Diazinon 모두에서 대부분 제거되어 수세에 의한 경감보다도 훨씬 우수하다는 것을 알 수 있었다. 시료를 2주간 저장한 후 복숭아를 수세나 탈피를 하지 않거나 수세만 하여도 TPN과 Diazinon이 대부분 제거되며, 탈피를 한 경우는 별로 차이가 없었다.

• Economic and Environmental Geology
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• v.44 no.6
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• pp.475-483
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• 2011

Quantitative estimate of manganese nodules based on the operation of a free fall grab (FFG) needs to be corrected because of its less retrieval ability. Previously, the correction parameter of the nodule abundance collected by FFG was calculated based on the image analysis of the photos of bottom sediment in the northern sector of the nodule exploration area of Korea in the NE equatorial Pacific. However, nodules in the southern sector are commonly covered by sediment, which may prevent the use of the correction parameter estimated by photographic techniques. In this study, we attempted dual nodule sampling at the same location by different equipments (i.e. box corer (BC) and FFG) to examine the previous correction parameter of nodule abundance for FFG operation. During the exploration cruises in 2007 to 2009, Mn-nodules were collected from 40 stations both by BC and FFG in the southern sector. The correlation analysis between BC and FFG operations revealed that the BC collected nodules 1.43 times larger than FFG. Our result suggests that the correction parameter of 1.43 can be applied for collection of FFG data to estimate Mn-nodule distribution in the southern sector. The obtained parameter is similar to the previous parameter (1.42~1.45) calculated by the image analysis method, indicating an usefulness of new correction parameter suggested by this study.

• Journal of Conservation Science
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• v.32 no.1
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• pp.43-49
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• 2016

Gold threads mean thread made by metal, it is composed various material to gold leaf, adhesive and media. The making technique and using materials of Gold threads are different from region, it can be used to distinguish country of origin. So this study finds characteristics and making techniques for flat gold threads of relics. Standard samples are made of animal glue, lacquer, red lacquer and etc. This materials are based on the scientific investigation of cultural gold threads properties. Then traditional techniques were estimated by comparison and analysis of actual cultural properties and standard samples. As a result of investigating cultural properties, it is similar to the standard sample which are mixed with red soil additives. After analysis of SEM-EDS, it is detected to Al, Si, Fe. So it is to the conclusion that traditional gold thread is made of adhesive mixed with red soil to improve gold color better. And this ways are similar with china that uses animal glue and red soil to adhesive and different from japan that uses lacquer to adhesive. Through this study, it will be used to data and reference for reappearance and making techniques of traditional gold threads.

• Economic and Environmental Geology
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• v.46 no.6
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• pp.569-580
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• 2013

Co-rich ferromanganese crusts (Fe-Mn crusts) distributed on the seamounts in the western Pacific are potential economic resources for cobalt, nickel, platinum, and other rare metals in the future. Regulations for prospecting and exploration of Fe-Mn crusts in the Area, which enables the process to obtain an exclusive exploration right for blocks of the fixed size, were enacted recently by the International Seabed Authority, which led to public attention on its potential for commercial development. Evaluation and selection of a mining site can be established based on abundance and grade of Fe-Mn crusts in the site as well as topography that should be smooth enough for mining efficiency. Therefore, acquisition of shipboard echo-sounding and acoustic backscatter data are prerequisite to select potential mine sites in addition to visual and sampling operations. Acoustic backscatter data can be used to locate crust-covered areas in a regional scale with the understanding of acoustic properties of crust through its correlation with visual and sampling data. KIOST had collected the topographic and geologic data to assess the resources potential for Fe-Mn crusts in the west Pacific region from 1994 to 2001. However, they could not obtain acoustic backscatter data that is crucial for the selection of prospective mining sites. Therefore, additional exploration surveys are required to carry out side scan sonar mapping combined with seafloor observation and sampling to decide the blocks for application of an exclusive exploration right.

• Journal of Korean Society of Environmental Engineers
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• v.34 no.5
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• pp.326-334
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• 2012

To determine the concentrations and the mass flow of selected 10 perfluorinated compounds (PFCs), a field study was conducted in a wastewater treatment plant. Raw influent, primary influent, primary effluent, aeration tank effluent, secondary effluent, final effluent, dehydration liquor, primary sludge, thickened sludge, final sludge were collected over 3 days in the summer and the winter respectively. Collected samples were equally mixed and then served as an analytical sample. Total 10 compounds were analyzed. In terms of treated water, the concentration of perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA) were in range of N.D.~26.29 ng/L and N.D.~38.15 ng/L respectively. Perfluorononanoate (PFNA) and perfluorohexanesulfonate (PFHxS) were ranged from N.D. to 36.79 ng/L and from N.D. to 24.36 ng/L. In terms of sludges, a concentration of PFOS, PFOA, and perfluorodecanesulfonate (PFDS) were detected from 6.82 to 59.37 ng/g, from 0.13 to 0.37 ng/g, from N.D. to 0.83 ng/g respectively. Mass loading for PFCs increased during wastewater treatment except for PFNA. The observed increase in mass flow of PFCs may have resulted from biodegradation of precursor compounds.