연속측정을 통한 오산천 상류의 수질 거동파악

신동환,최이송,박재영,오종민 경희대학교 2003 環境硏究 論文集 Vol.12 No.-

In this study, the variation of water quality in Aswan stream was investigated through continuous monitoring and matt balance and metabolism occurred into water body environment was estimated to set up effective management plan of small urban stream. Sated on the results, the rate of output to input (O/I rate. in the flux balance was 1.16 and about 16% sae increased between the section of OS1 ∼ OS3. Also, the SS and BOD loadings between the tame section were increased by 29% and 31%, respectively. Although increase of flux influenced on the increase of SS and BOD loading, it was judged that the larger part of o/I rate of pollutants comparing to O/I rate of flux was due to up-take from sediment on the riverbed. The contribution percentage of BS1 and BS2 for flux between the section of OS1 ∼ OS2 was 17.3%, total section was 31.3% (including BS3). However, the contribution of tributaries for SS, BOD and T-N loading wore 50.3%, 33.0% and 57.6%, respectively. Eventually tributaries contributed the pollution of water quality. To reduce pollution of water quality in the section of OS1 ∼ OS3, firstly, it need that effective management plan for tributaries mutt be set up to improve the water quality in main stream. Secondly, the counter plan for ro-eruptyon of pollutants from sediment in main-stream it required to prevent inner pollution. On this study, we showed that small urban stream can be managed effectively by simple investigation to prevent deterioration of water quality. also, it is more important that matter cycle and matt balance happening in the stream environment must be correctly estimated to make up healthy stream environment and to improve water quality.

자연형 하천공법 적용 후의 오산천 상류구간의 수질변화 조사

최이송,박재영,윤세철,오종민 慶熙大學校 地球環境硏究所 2002 지구환경논문집 Vol.13 No.-

Recently, Korea is concentrating his concern to restoration of stream because its water quality has been deteriorated by various pollutants generated through urbanization and industrialization. As a test section, upstream section(3.1㎞) of Osan Stream which has the characteristics of the typical small urban stream was restored with natural form by various construction methods. This study was performed to understand the variation of water quality for the section after restored to natural form and to estimate improvement effectiveness of water quality by it through comparison of water quality before and after constructed. Based on the results, it was estimated that, even though inflow of tributaries, water quality was improved at the section of OS1 and OS3 and this was influenced by self-purification increased. Through the comparison with the datum of 1996, we could know that water quality after construction was greatly improved. Therefore naturalization form of Osan Stream contributed to purification of water quality and to restore stream with natural form was estimated as a desirable method for improvement of stream water quality.

다공성 하천구조물을 이용한 2차 처리수의 수질개선 효과

이혜미,오종민,최이송 경희대학교 환경연구소 2002 環境硏究 論文集 Vol.11 No.-

This study was performed to application of porous hydraulic structures(porous weir and porous river bed materials) to water purification in small and middle stream. This study was investigated the ability of water purification according to the variety of environmental conditions, periphytons and material of hydraulic structures. When the ordinary hydraulic structure was used as contact d a , the average removal efficiency of SS, BOD and COD were SS(48.4%), BOD(25.2%), COD(12.0%) respectively. Also when the porous hydraulic structure was used as contact media, the average removal efficiency of SS, BOD, COD and T-P were SS(83.0%), BOD(62.1%), COD(45.9%), T-P(32.3%) respectively. Judging from our results, porous concrete applied to the weir from took a great role of removal efficiencies of BOD, COD(low concentration range of organic materials) and T-P

풍력발전시스템용 Double-side형 횡방향 자속 릴럭턴스 발전기 설계 및 특성해석

송의섭(Ui-seop Song),오주환(Ju-bwan Oh),권병일(Byung-i1 Kwon) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.10

본 논문에서는 직접구동용 풍력발전 시스템에 적용할 Double-side형 TFSRG(Transverse Flux Switched Reluctance Gnerator)의 설계와 특성해석을 진행 하였다. 출력방정식과 극당 최대 기자력 식을 이용하여 외부치수와 내부치수를 설계 하였고, 설계된 Double-side형 TFSRG는 3차원 유한요소해석을 통하여 토크특성, 공극에서의 자속밀도, 속도에 따른 유기기전력 등의 특성을 확인하였다. 그 결과 제안한 Double-side형 TFSRG 설계와 설계방법으로 예상된 설계 사양의 값을 얻을 수 있었고 또한, 설계의 타당성을 검증 할 수 있었다.

하천 조건과 부착미생물군집에 따른 수질의 변화

엄경미,최이송,오종민 경희대학교 2005 環境硏究 論文集 Vol.14 No.-

This study carried out in Osan stream to understand the variation of water quality with stream condition and attached microorganism community. The 5 sites in Osan stream with different velocities (0∼0.59 m/sec) was selected and riverbed materials covered with attached microorganism communities was used in indoor experiment to estimate their water purification ability. Based on the results, velocity was influent to attached microorganism communities and middle velocity (0.10∼0.32 m/sec) was estimated to offer attached microorganism the most suitable growth environment. The result on average improvement effect of water quality showed that concentration of pollutant matter was decreased with increase of microorganism communities, and this phenomenon, decrease of pollutant matter, was influence of microorganisms as a natural purification reaction.

제주매조의 주당본수에 따른 주요형질 사초수량 및 조성분 변화

조남기,송창길,김인식,조영일,오은경 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.6

본 연구는 제주지역에서 주당 본수(1, 2, 3, 4, 5 및 6본)에 따른 제주매조(Setaria italica Beauvois)의 주요형질, 수량성 및 사료가치를 검토하고, 가축의 조사료로 이용하기 위하여 2000년 5월 13일부터 8월 14일까지 수행하였으며, 그 결과를 요약하면 다음과 같다. 이삭 출현일수는 83일에서 87일로 주당본수간에 큰 차이가 없었으나, 본수가 많을수록 이삭출현일수는 지연되는 경향이었다. 초장은 주당 1본에서 183.3㎝였던 것이 주당 3본에서 187.1㎝로 길어졌으나, 본수가 그 이상으로 증가되면 점차적으로 짧아져서 주당 6본에서 초장은 163.9㎝였다. 엽장, 엽폭, 엽수, 절수, 경직경 및 엽록소 측정치는 주당 본수가 1본에서 6본으로 많아질수록 왜소한 경향이었다. 생초수량, 건물수량, 조단백질 수량 및 TDN 수량은 주당 3본 파종구에서 각각 55.02MT/ha, 15.38MT/ha, 1.68MT/ha, 7.18MT/ha으로 가장 높았으나, 그 이상과 그 이하의 본수에서는 점차적으로 감수되었고, 주당 6본에서는 TDN 수량이 4.07MT/ha로 감수되었다. 주당 본수가 1본에서 6본으로 많아짐에 따라 조단백질 함량은 10.4%에서 12.0%로, 조지방 함량은 1.5%에서 1.6%로, 가용무질소물은 36.8%에서 38.2%로, TDN 함량은 45.9%에서 48.2%로 직선적으로 증가된 반면 조회분 함량은 9.2%에서 8.4%로, 조섬유 함량은 36.2%에서 33.7%로 감소되는 경향이었다. Jeju Itallian millet was grown at six plants per hill (1,2,3,4,5,6) from May 13 to Aug. 14, 2000 at Jeju island to determine influence of plants per hill on agronomic characters, forage yield and quality. Days to heading was increased as number of plants per hill was decreased. Plant height with three plants per hill (187.1㎝) was the longest, while with six plants per hill (163.9㎝) was the shortest. Leaf length, leaf width, the number of leaves, the number of nodes, stem diameter and SPAD reading values gradually decreased as the number of plants per hill was increased. Fresh forage yield, dry matter (DM) yield, crude protein (CP) yield and total digestible nutrient (TDN) yield were the greatest (55.02, 15.38, 1.68, 7.18MT/ha) at the three plants per hill. TDN gradually decreased to 4.07MT/ha in six plants per hill. Crude protein content increased from 10.4 to 12.0%, ether extract content from 1.5 to 1.6%, nitrogen free extract content from 36.8 to 38.2 and TDN content from 45.9 to 48.2%, but crude fiber content decreased from 36.2 to 33.7% and crude ash content from 9.2 to 8.4% as the number of plants per hill was increased.

Molecular Identification of the Vaccine Strain from the Inactivated Rabies Vaccine

Yang, Dong-Kun,Oh, Yoon-I,Cho, Soo-Dong,Kang, Hee-Kyung,Lee, Kyung-Woo,Kim, Yeon-Hee,Song, Jae-Young The Korean Society for Microbiology 2011 Journal of Bacteriology and Virology Vol.41 No.1

Since 1994, several different inactivated rabies vaccines have been used to immunize domestic animals such as dogs, cats, and cattle in South Korea. The Korean Veterinary Authority has conducted safety and efficacy testes of inactivated vaccines using laboratory animals. In this study, we applied a molecular method to investigate the genetic characterization of the rabies virus (RABV) genes in six commercial inactivated rabies vaccines, and determined the efficiency of two extraction reagents (i.e., sodium citrate or isopropyl myristate) to separate the vaccine antigens from the antigen/adjuvant complexes. Six partial nucleocapsid (N: 181 bp) and five partial glycoprotein (G: 306 bp) genes were successfully amplified with specific primer sets, which demonstrated that sodium citrate is more efficient in than isopropyl myristate in extracting viral RNA from inactivated gel vaccines. In addition, we identified the viral strain of the vaccine by analyzing the nucleotide sequences of the N and the G genes. The nucleotide similarity of the partial N and G genes ranged from 97.1 to 99.4% and from 91.8 to 100% among rabies vaccine strains, respectively, indicating that each manufacturer used different rabies virus strains to produce their vaccines. The molecular method used in this study could also be used to identify viral strains in other inactivated vaccines.

농업용수 수질기준 T-N 항목 설정을 위한 벼생육 실험

최선화,김호일,윤경섭,최이송,오종민 한국물환경학회 2004 한국물환경학회지 Vol.20 No.3

The present water quality standards for agricultural were established without considering the effects of water quality on the safety, growth, yield and quality of crops. This study was carried out to investigate the effects of irrigation water quality on the growth, yield, and grain quality of rice, and to acquire basic knowledges to set up water quality standards for irrigation. The field and pot experiments were conducted with irrigation water that was previously adjusted four concentrations (control, 5, 10, 20 ㎎/L) and six concentrations (control, 5, 10, 15, 20, 30 ㎎/L) by NH₄NO₃ solution and replicated three and four times with randomized block design, respectively. The results of this study showed that the inorganic nutrient of rice plant, rice protein contents and number of panicle tended to increase as the T-N concentration in irrigation water was increased. In addition, grain yield at T-N 10 ㎎/L and 20㎎/L were significantly higher than the control at the field experiment. From the pot experiment at T-N 30 ㎎/L, the percentage of head rice was slightly lower due to the increase of green kernel and white belly/core kernel.

질소시비수준이 제주재래단지무의 성장 , 수량 및 사료가치에 미치는 효과

조남기,조영일,송창길,오태수,부창훈 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.5

In order to determine the influence of nitrogen on agronomic characters, forage yield and quality, a Cheju Native Danji radish was cultured on the volcanic ash soil at the Experimental Farm of Cheju University under the seven levels of nitrogen rates (0, 50, 100, 150, 200, 250, 300 ㎏/㏊) from April 17 to June 20, 1999. The flowering time was delayed from 52 to 55 days after seeding as the nitrogen rate increased. The plant height increased by increase of nitrogen rate, showing longest at 300 ㎏/㏊ with 93cm and shortest at no application plot with 68㎝. The difference on leaf number and root length by nitrogen rates showed a similar tendency to the plant height. Also total fresh yield, forage and root fresh weight, and forage dry matter were gradually increased by the increase of nitrogen application amount, accordingly the total fresh yield showed the 40.47 MT/㏊ and 83.30 MT/㏊ at 0 and 300 ㎏/㏊ of nitrogen application, respectively. As the nitrogen rate increased from 0 to 300 ㎏/㏊, the content of crude protein and total digestible nutrients significantly increased from 17.1% to 32.2% and from 46.9 to 68.9%, respectively. And the ether extract content and nitrogen free extract content were slightly increased. While the contents of crude ash and crude fiber decreased from 19.7% to 15.8% and from 14.9% to 11.6%, respectively.

제주지역에서 질소분시에 따른 귀리의 생육특성 , 사초수량 및 조성분 변화

조남기,조영일,송창길,송승운,오은경 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.4

This study was conducted at a volcanic ash soil of Jeju island from 1997 to 1998 to determine the optimum frequency of split N application for forage production of oats. Nitrogen fertilizer was applied with 240㎏ N/ha, and frequencies of the split applications were 1, 2, 3, 4 and 5 times. Days to heading increased from 160 to 163 days as N was split-applied from one to five applications. Plant height was greatest(195.7㎝), followed by nitrogen application of at five applications. Generally plant height was shortest as the number of splitting nitrogen application treatments was decreased. This pattern held for leaf length, leaf width, and culm length which were greatest in four and five applications respectively, but no. of grains per panicle and No. of spikelet per panicle which were increased in three applications with 54.0 and 22.2 respectively. Fresh forage yield increased from 36.63 to 51.70MT/ha, dry matter(DM) yield from 6.47 to 8.43MT/ha, crude protein(CP) yield from 0.75 to 1.20MT/ha, total digestible nutrients(TDN) yield from 3.22 to 4.65MT/ha as N was split-applied from one to four applications, and then decreased to 51.07, 7.63, 1.12 and 4.48MT/ha respectively, in five split applications. Grain yield increased from 4.70 to 5.67MT/ha as N was split-applied from one to three applications and then decreased to 5.07MT/ha in five applications. This pattern held for test weight and 1,000 grains weight which were heaviest in three applications with 366.5 and 37.8g, respectively. Nitrogen uptake increased from 120 to 191.2㎏/ha as N was split-applied from one to four applications, and then decreased to 178.7㎏/ha in five split applications. Nitrogen use efficiency decreased from 53.9 to 42.7 ㎏ DM/kg N with increasing split N applications. Crude protein content increased from 11.6 to 14.6%, ether extract content from 2.3 to 4.0%, nitrogen free extract content from 39.7 to 41.6%, and TDN content from 49.8 to 57.4%, but crude ash content decreased from 8.7 to 6.1% and crude fiber from 31.6 to 27.4% as N was split-applied from one to five applications. These results indicate that the optimum frequency of split N applications is oats in volcanic ash soils of Jeju island.