• Title, Summary, Keyword: Boryong

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Survey of antibody on Orientia Tsutsugamushi among wild rodents in Gyeongnam area and detection by nested polymerase chain reaction (경남지역 야생들쥐에서 Orientia tsutsugamushi에 대한 항체 조사 및 PCR에 의한 검색)

  • Hah, Dae-Sik;Kim, Young-Hoon;Park, Jung-Ung;Park, Jae-Kap;Kim, Chung-Hui;Ryu, Jae-Doo;Jong, Myung-Ho;Heo, Jung-Ho;Shu, Jong-Lip;Cho, Myung-Heui;Lee, Kuk-Cheon;Kim, Gon-Sup;Kim, Eui-Kyung;Kim, Jong-Shu
    • Korean Journal of Veterinary Research
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    • v.44 no.2
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    • pp.241-249
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    • 2004
  • As a part of epidemiologic investigation of tsutsugamushi disease, the wild rodents which were captured in Gyeongnam area were diagnosed with indirect immunofluorescent antibody assay (IFA) and Polymerase Chain Reaction (PCR) to find if they have an antibody against Orientia tsutsugamushi. The conclusion was drawn as followings. (1) The captured 58 wild rodents showed that the subspecies distribution of Apodemus agrarius was 86.2%, Microtus fortis was 8.6% and Crocidura lasiura was 5.2%. (2) The antibody positive rate of O. tsutsugamushi Gilliam, Karp, Karto and Boryong by IFA method was 32.0% in Apodemus agrarius among 50 wild rodents and 40.0% in Microtus fortis among 5 wild rodents, respectively. It was negative in the case of all the 3 Crocidura lasiura. (3) The antibody titers on Apodemus agrarius, Microtus fortis and Crocidura lasiura against Gilliam, Karp, Karto and Boryong were measured between 1:20 and 1:640. The antibody titer against each antigen was in the order Boryong>Gilliam>Karp. (4) O. tsutsugamushi was detected from the blood, spleen and kidney from the artificially infected mice by IFA and PCR. IFA showed the positive response between 3 and 18 days after inoculation. On the other hand, positive response was found from all the samples by PCR. (5) From PCR of the genomic DNA extracted from the blood, spleen and kidney samples of the captured wild rodents, Boryong-specific amplification product with size of 210 bp, which is particular in Boryong, was detected from spleen and kidney samples, but not detected in the blood. (6) Boryong-specific amplification product was detected from spleen and kidney samples which were obtained at 3, 6, 12, 18 and 24 days after the infection with Boryong. But, it wasn't detected from the uninfected samples. (7) From PCR of spleen and kidney samples of the captured wild rodents, it was found that positive rate of O. tsutsugamushi in Apodemus agrarius and Microtus fortis were 25.0% (4/16) and 20.0% (1/5), respectively. From the above results, it can be concluded that Apodemus agrarius resided in Gyeongnam area carried O. tsutsugamushi and PCR method might be a simple, precise, rapid and useful diagnostic tool than IFA for the diagnosis of O. tsutsugamushi.

A Study on the Load Run Back Control of a Coal Fired Power Plant. (석탄화력 발전소의 LOAD RUN BACK에 관한 연구)

  • Song, Seong-Il;Hwang, Jae-Ho;Park, Hyung-Gu;Kim, Hueng-Rok
    • Proceedings of the KIEE Conference
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    • pp.94-97
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    • 1989
  • This work describes the imortance of the load run back control of a thermal power plant which has a serious effect on a power system, and shows the load run back tests results which was carried out at BORONG Thermal Power Plant, finally suggests what control circuits should be modified in the plant control system in order to prevent plant trip in case of auxiliary machine failure.

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Modeling and Evaluation on the Dispersion of Air Pollutants in the Large Scale Thermal Power Plant (대단위발전소의 대기오염물질 확산에 관한 모델링 및 평가에 관한 연구)

  • Chun, Sang-Ki;Lee, Sung-Chul
    • Journal of Environmental Impact Assessment
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    • v.6 no.2
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    • pp.81-92
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    • 1997
  • This paper presents the results from the comparison analysis and evaluation between the air pollutant dispersion modeling results and the observation data in the area within a 10 km radius from the Boryong thermal power plants. The observation data used in this study were the air pollutant concentrations which had been continuously measured from 8 locations around the Boryong power plants by TMS(tele-monitoring system) for 3 months from September to November, 1996. The short-term and long-term predictions were carried out using ISC3 model and LPDM(Lagrangian Panicle Dispersion Model). The results of ISC3 modeling in a short-term showed highly as 0.7 in a correlation coefficient, but in a long-term showed just 0.54. On the other hand, LPDM showed 0.78 in a correlation coefficient for a long-term, but in a short-term showed highly value than the observation concentrations.

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PSS Modeling and Cerification for #6 Generator of Boryong T/P (보령 T/P 6호기 PSS 모델링과 검증)

  • Choi, H.K.;Kim, D.J.;Moon, Y.H.;Kim, Y.H.;Yoon, Y.B.
    • Proceedings of the KIEE Conference
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    • pp.31-34
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    • 2002
  • It studied modelling about employing analog PSS in domestic 500MW grade standard thermoelectric power plant in this paper. Modeling and parameters were verified by simulation of PSS response characteristics measured in AVR step examination and using power plant system model parameters decided by generator characteristics test. Through this PSS modelling research, contributed in domestic electrical power system small signal stability as that do modelling to be possible exact analysis of power system.

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The treatment of coal fly ash for recycling as ceramic raw materials : II. The effects of sampling condition and pH treatment in elutriation (요업 원료로 재활용하기 위한 석탄회의 처리 : II. 채취조건 및 수비선별시 pH의 영향)

  • 허화범;정철원;박종현;신건철
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.6 no.4
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    • pp.627-639
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    • 1996
  • Charateristics of Ansan and Boryong coal fly ashes collected at different seasons were investigated for the recycling them as ceramic raw materials. The effect of pH treatment on the classification of Ansan coal fly ashes by elutriation was discussed. Charateristics of ansan and boryong coal fly ashes were not significantly changed with power plants and seasons. major crystalline phases were mullite and quartz. These results suggested that coal fly ashes cab be used as raw materials instead of clay minerals. However, particle size distribution was very broad from a few $\mu\textrm{m}$ to over $100\;\mu\textrm{m}$. Especially, ansan coal fly ashes have various morphologies. Therefore, coal fly ashes should be classified before using as raw materials. Because of higher dispersion by pH treatment, spherical cenospheres were mainly collected in the 4th step and particle size distribusion was also decreased by elutriation for the ansan coal fly ashes. The specific surface area of the sample collected in the 4th step was $1.24\;m^{2}/g$ which was smaller than that of not treated Ansan coal fly ashes.

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Impacts on Water Surface Level of the Geum River with the Diversion Tunnel Operation for Low Flow Augmentation of the Boryong Dam (금강-보령댐 도수터널 운영에 따른 금강 본류 내 수위 영향 분석 연구)

  • Jang, Suk-Hwan;Oh, Kyoung-Doo;Oh, Ji-Hwan
    • Journal of Environmental Science International
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    • v.26 no.9
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    • pp.1031-1043
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    • 2017
  • Recently severe drought caused the water shortage around the western parts of Chungcheongnamdo province, South Korea. A Diversion tunnel from the Geum river to the Boryong dam, which is the water supply dam for these areas has been proposed to solve this problem. This study examined hydraulic impacts on the Geum river associated with the diversion plan assuming the severe drought condition of 2015 would persist for the simulation period of 2016. The hydraulic simulation model was verified using hydrologic and hydraulic data including hourly discharges of the Geum river and its 8 tributaries, fluctuation of tidal level at the mouth of the river, withdrawals and return flows and operation records of the Geum river barrage since Feb. 1, 2015 through May 31, 2015. For the upstream boundary condition of the Geum river predicted inflow series using the nonlinear regression equation for 2015 discharge data was used. In order to estimate the effects of uncertainty in inflow prediction to the results total four inflow series consisting of upper limit flow, expected flow, lower limit flow and instream flow were used to examine hydraulic impacts of the diversion plan. The simulation showed that in cases of upper limit and expected flows there would be no problem in taking water from the Geum river mouth with a minimum water surface level of EL(+) 1.44 m. Meanwhile, the simulation also showed that in cases of lower limit flow and instream flow there would be some problems not only in taking water for water supply from the mouth of the Geum river but also operating the diversion facility itself with minimum water surface levels of EL(+) 0.94, 0.72, 0.43, and 0.14 m for the lower limit flow without/with diversion and the instream flow without/with diversion, respectively.

A Fundamental Properties of Microcement in Earth Concreting (지반보강용 마이크로시멘트의 기초적 특성)

  • 김진춘;최광일;박재용
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.217-222
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    • 1994
  • Generally speaking, grouting on the base stabilizes the ground as the aspects of mechanic and engineering properties, with drilling hole at any depth of the earth, and pressuring the cement milk or special chemical grouting material in it. The purpose of grouting on the base is waterproofness and solidification of the ground by earth concreting that the cement milk pass through paticles of soil or crack of rock. This report shows the fundamental properties of microcement compared with those of ordinary portland cement in a point of grouting. It also describes that experimental applications on the treatment of the weathered rock at the constructior of Taegu subway and Boryong earth filled dam site, south of chungchung province, resulted in success.

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Characteristics of Abutment Slopes of Four Dams in Korea (우리나라 주요 댐 좌우안 사면의 특징)

  • 신동훈;이종욱
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.183-195
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    • 2000
  • Slopes near a dam body can be categorized into 4 groups, such as right and left abutment slopes, reservoir slopes, slopes along the access road and slopes along the relocated road. For each of the geological investigation, the design standards, the evaluation methods of safety and the maintenance methods, both abutment slopes in the four dams have different characteristics from the conventional cut slopes in that they can severely affect the dam safety. From this point of view this study compares and analyzes the geological investigation methods, the status of design and construction, evaluation method of safety, and monitoring & maintaining methods for four major dams in Korea, such as Soyanggang dam, 'Andong dam, Chungju dam and Boryong dam.

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Application of Thermal Discharge Dispersion Model on Cheonsu Bay (천수만 해역에서 온배수 확산모델의 적용)

  • 박영기
    • Journal of Environmental Science International
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    • v.4 no.2
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    • pp.169-180
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    • 1995
  • This Daper presents effective simulation of the dispersion of thermal discharge which can be relesed at Boryong power plant. Applied numerical models are finite difference method for hydrodynamic analysis and Masch-model comprised of conditions for ambient current velocity. Application of these models is done in Cheonsu Bay Summing up the results of this study are as follows; 1. It is found that the result for measurements of temperature appears high at southwardly Songdo on flood. The reason is that tidal currents which flowed north direction were accompanied with southwardly dispersed thermal discharge. A minute Particle of thermal Plume has a tendency to dispels inward Deacheon Bay. 2. According to the results of numerical experiment, maximum distance for thermal discharge dispersion appeared 10.8 km at lower part and 8.6 km at upper part with power plant outlet as starting point. 3. Comparative the numerical simulation and Airbone Multispectral Scanner indicated that thermal discharge should be verified separative phenomena. The simulated results were compared with field data set showing good agreement. It is concluded that these model can be simulated well.

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Seasonal and Regional Variations of Agar Yield and Properties of Tetrasporophytes and Gametophytes in Korean Gracilaria verrucosa (한국산 꼬시래기 (Gracilaria verrucosa)의 사분포자체와 배우체의 한천 수율 및 특성의 계절적·지역적 변화)

  • KIM Young Sik;KOO Jae-Geun
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.36 no.5
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    • pp.474-479
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    • 2003
  • The effect of season, life stages and harvesting sites on the yield and properties of agars extracted from Gracilaria verrucosa were determined. G. verrucosa were collected seasonally from November 2001 to August 2002 at Cheongsapo and Boryong, Korea. The plants were sorted Into the different life stages (tetrasporophytes and gametophytes) and dried at $60^{\circ}C.$ The yield, sulfate, protein, uronic acid and 3,6-anhydrogalactose of the agar were determined, and standard parameters of physical quality were measured. No differences were found in yield and properties of agars from the two different harvesting sites and from lift history phases. The yield of agar was maximum in summer $(17.3-20.0\%)$ and minimum in winter $(11.9-13.1\%).$ Maximum gel strength occurred in winter when the agar yield and sulfate content were low. Gel strength was negatively correlated with agar yleld. Seasonal variations in agar yield and its quality were discussed in a view to managing the exploitation of this resource.