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      • KCI등재

        간접방류사업장 관련 폐수의 생태독성수준 및 특성 평가

        김종민,신기식,이수형,이정서,이택준,Kim, Jongmin,Shin, Kisik,Lee, Soohyung,Lee, Jungseo,Lee, Taekjune 한국물환경학회 2017 한국물환경학회지 Vol.33 No.4

        This paper aims to evaluate the characteristics of direct and indirect effluents'toxicity level and difference between two test durations (24 h and 48 h) of test method. The proportion of the indirect effluent samples which exceeded the ecotoxicity permit limitations (TU 1 or TU 2) showed more than 2 times higher than that of direct effluent samples. However, effluent toxicity of Wastewater Treatment Plants (WTPs) indicated less than TU 1 regardless of influent toxicity. From this results, treatment process was thought to have a good efficiency. WTP Salinity was very similar between influent and effluent. This trend could be reconfirmed by the component ratio of ion concentration between them and $Na^+$, $SO_4^{2-}$, $C^-$ lions which have a greater percentage than other ions. In addition, in case of high salinity, toxicity value also showed high level. To judge from above results, indirect effluents which were exempted from application of ecotoxicity standards, may need a new effluent limitations regardless of the treatment efficiency of WTP. According to circumstances, effective countermeasure may need to restrain the discharge of salinity-contained effluents which came from indirect-effluent factories. Test duration comparative study indicated that 48 h results were higher toxicity (exceeding rate of ecotoxicity criteria) than 24 h by the 5 to 5.4 percentage. 24 h test duration seemed to be useful in case of rapid detection, whereas 48 h test method could be applied for reinforcement of ecotoxicity regulatory system.

      • KCI등재

        호소형 및 하천형 댐 호의 육수학적 특성과 조류발생과의 상관관계

        김종민,허성남,노혜란,양희정,한명수 한국육수학회 2003 생태와 환경 Vol.36 No.2

        본 연구는 호소형과 하천형으로 크게 구분할 수 있는 주요 댐 호의 8년간 수질 및 수문조사자료를 이용하여 (1990~1998) 조류발생 패턴과 수문학적 요인과의 관계를 분석하고자 하였다. 각 댐 호의 수온은 하천형이 호소형보다 계절별 변화폭이 큰 것으로 나타났다. pH는 호소형의 경우 겨울철에 낮고 여름철에 상대적으로 높은 수준을 보였으나, 하천형에서는 대부분 봄철과 가을철에 높고 여름철에 낮은 수준을 나타냈다. COD 농도는 호소형 3개 댐 호 및 하천형 댐 호인 팔당호에서 낮고(1 mg/L 내외), 금강하구언 및 낙동강하구언에서는 높았다(2~3 mg/L). 용존산소 농도는 하천형이 호소형보다 높은 값을 보였다. 용존 산소포화도의 계절별 변화패턴은 하천형 댐 호의 경우 높은 수준(80~100%)을 유지하면서 계절별 변화폭도 그리 크지 않은 반면, 호소형에서는 늦봄~초여름경 최고치(93%)를 보이다가 겨울철까지 천천히 감소(46~66%)하는 패턴을 나타냈으며, 각 호수 저수량의 계절적 변화와 반비례하는 경향을 보였다. 총 질소와 총 인 농도는 호소형에서 낮았으며, 호소형은 계절별로 큰 변화가 관찰되지 않은 반면 하천형에서는 상대적으로 유입 부하량이 많고 변동폭도 큰 것으로 나타났다. 하천형 호소에서도 팔당호는 금강하구언이나 낙동강하구언보다 매우 낮은 수준을 나타냈다. 연 평균치로 본 N/P 질량비는 호소형에서는 높고, 하천형에서는 낮았다. 투명도와 부유물질 농도의 상관관계로 판단할 때 하천형에서의 투명도는 부유물질 농도에 의존하는 경향을 보였다. 클로로필 α 농도와는 정의 상관관계가 밝혀졌으며, 하천형에서는 유의성이 없었다. This paper aimed to analyze the relationship between algal bloom patterns and hydrological, limnological data which were collected from major reservoirs in Korea for 8 years (1990~1997). Water temperature of river-type reservoirs showed wider seasonal fluctuations than that of lake-type. pH of lake-type reservoirs was low in winter season but high in summer season. In contrast, river-type reservoirs showed high pH in spring and autumn seasons as well, and very low in summer season. COD of lake-type reservoirs and Paldang reservoir was lower (2~3 mg/L) than that of Geumgang and Nagdonggang reservoirs (6~9 mg/L). Dissolved oxygen (DO) of river-type reservoirs was higher than that of lake-type reservoirs. Seasonal fluctuation pattern of Do saturation in river-type reservoirs was high (80~100%) and remained relatively constant whereas lake-type reservoirs showed the highest level (93%) in late spring or early summer, which gradually decreased entering winter season (46~66%). And monthly variation of DO saturation showed inverse proportion to water volume in lake-type reservoirs. Nutrients concentration in river-type lake is higher than lake-type. Seasonal fluctuation of nutrients (T-N, T-P) in lake-type reservoirs was relatively small than that of river-type reservoirs. Annual mean N/P mass ratio of lake-type reservoirs was higher than that of river-type. Transparency tended to related with the suspended solid concentration in river-type reservoirs. Algal bloom of lake-type and river-type reservoirs occurred at any time except rainfall and winter periods. And it dominated in summer and early autumn, respectively. Algal bloom of river-type reservoirs was higher than that of lake-type. Relationship between rainfall and chlorophyll-α in lake-type reservoirs was relatively high, however river-type reservoirs showed insignificant.

      • KCI등재

        강우 및 유입 하천수가 팔당호 수질에 미치는 영향분석

        김종민,노혜란,허성남,양희정,박준대 한국물환경학회 2005 한국물환경학회지 Vol.21 No.3

        This paper aimed to compare the daily water quality as well as the hydrological data gathered for the past two years (2000 to 2001) between the two influent rivers of Paldang reservoir. The analysis also has been carried out to draw out the factors that affect the water quality at the dam site, where the main drinking water drawing point is located. The relationship between total amount of monthly rainfall and monthly inflow showed r²=0.74 (p<0.05). The highest peak of inflow of influent rivers recorded in August and September (in the year of 2000) and July and August (2001). Average inflows of influent rivers in 2000 and 2001 are calculated at 209.0, 161.5 CMS (Bughangang), 268.6, 148.2 CMS(Namhangang), and 7.8, 5.0 CMS (Gyeongancheon). The formula which was driven from the relationship between inflow and COD load of influent rivers, explained that COD concentration in general increased with the inflow. But during the rainy seasons (July, August, and September), COD concentration decreased according to the increase of inflow. The daily rainfall and COD concentration(or load) during the rainy season (August and September in the year of 2000, July and August in 2001) indicated that the peak of COD load correspond with the rainfall, which decreased sharply after 3 or 4 days. The reason was thought that the high COD load was diluted rapidly by the rain flow. Water temperature, pH and conductivity measured at dam site decreased obviously when the inflow sharply increased. Peak period of total phosphorus concentration coincided with that of inflow. In rainy season, chlorophyll-a concentration decreased obviously as the inflow increased. The reason can be ascribed to the flushing effect caused by the operation of floodgate.

      • KCI등재후보

        팔당호 수질의 계절별 변화특성 및 장기 추세

        김종민,허성남,양희정,노혜란,임연택,정완종 한국물환경학회 2002 한국물환경학회지 Vol.18 No.1

        The long-term data ('88∼2000), which have been released by National Institute of Environmental Research (NIER) and Ministry of Construction and Transportation on the water quality and hydrological characteristics in Lake Paldang, were analyzed to find their monthly and annual variation tendency. Water volume tended to decrease during summer season, this phenomenon was assumed that dam authority might open the floodgate in advance to prevent an inundation. And DO saturation ratio exceeded 95% during ail seasons. That time, the concentration of chlorophyll-a (about 10㎎/㎥or higher) and T-P (about 0.03 ㎎/l or higher) denoted high level. Correlation between conductivity and COD denoted middle level (r=0.597, r²=0.36, p$lt;0.01). Conductivity denoted the minimum value in January and February, that was the coldest and freezing season in Lake Paldang. COD denoted the maximum value in June, whereas the inflow and pollutant load were high in July and August. Therefore It was assumed that the effect of dilution was stronger than that of pollutant load. T-N annual variation pattern of annual mean level was similar to COD pattern, but T-P denoted an opposite pattern to T-N. N:P mass ratio seemed to be more affected by T-P concentration than T-N. Annual mean level of N:P mass ratio tended to increased during 1991-2000. In June, transparency denoted the highest level and the concentration of chlorophyll-a & suspended solids denoted the lowest level. The relationship between transparency and suspended solids were relatively high (r=-0.6, r²=0.362, p$lt;0.01) than the relationship between transparency and chlorophyll-a (r=-0.269, r²=0.072, p$lt;0.01).

      • KCI등재

        Clinical Course of Infliximab Treatment in Korean Pediatric Ulcerative Colitis Patients: A Single Center Experience

        김종민,이유민,강빈,최연호 대한소아소화기영양학회 2014 Pediatric gastroenterology, hepatology & nutrition Vol.17 No.1

        Purpose: Infliximab (IFX) is considered safe and effective for the treatment of ulcerative colitis (UC) in both adults and children. The aim of this study was to evaluate the short- and long-term clinical course of IFX in Korean children with UC. Methods: Pediatric patients with UC who had received IFX infusions between November 2007 and May 2013 at Samsung Medical Center were retrospectively investigated. The clinical efficacy of IFX treatment was evaluated at 8 weeks (short term) and 54 weeks (long term) after the initiation of IFX treatment using the Pediatric Ulcerative Colitis Activity Index (PUCAI). The degree of response to IFX treatment was defined as complete response (PUCAI score=0), partial response (decrement of PUCAI score≥20 points), and non-response (decrement of PUCAI score <20 points). Adverse events associated with IFX treatment were also investigated. Results: Eleven pediatric patients with moderate to severe UC had received IFX. The remission rate after IFX treatment was 46% (5/11) and 82% (9/11) at 8 weeks and 54 weeks after IFX treatment, respectively. All patients who were steroid-dependent before treatment with IFX achieved remission at 54 weeks and were able to stop treatment with corticosteroids, while all steroid-refractory patients failed to achieve remission at 54 weeks after treatment with IFX. Conclusion: Response to IFX treatment after 8 weeks may predict a favorable long-term response to IFX treatment in Korean pediatric UC patients.

      • SCOPUSKCI등재

        피부 림프종에서의 피부 림프구 관련 항원(Cutaneous Lymphocyte-Associated Antigen)의 발현

        김종민,김광중,김수영,김재왕,이종주,신형식 대한피부과학회 1999 大韓皮膚科學會誌 Vol.37 No.2

        Background : A pathogenesis of skin-homing lymphoid cells in primary cutaneous T-cell lymphama(CTCL) has not been elucidated. CLA(cutaneous lymphocyte-associated antigen) defined by HECA-452 monoclonal antibody has been proposed as the novel skin-homing receptors of infiltrative lymphocytes in atopic dermatitis and graft-versus-host disease. Accordingly, CLA may be a detertrtinant explaining about the skin-homing properties of lymphoid tumor cells in CTCL. Objective : This study was conducted to investigate the immunohistochemical expression of CLA in the lesianal tissue specimens of cutaneaus lymphomas. Methods : Immunohistochemically, we examined the expression of CLA, E-selectin, ICAM-1 and LFA-1 antigens in the tissue specimens taken from the skin lesions and lymph nodes of the 22 patients with cutaneaus lymphomas and the 20 control subjects with non-cutaneous lymphomas. Results : 1. The expression rats of CLA was 40.9% in the skin specimens of cutaneaus lymphomas. We could not find any expression of CLA in non-cutaneous lymphomas. 2. CTCL showed a more frequent expression of CLA(80%) than cutaneous B-cell lymphomas (CBCL)(8.3%). We found more frequently CLA+ high endothelial venules in non-cutaneous lymphomas (40%) than in cutaneous lymphomas(9.1%). 3. CLA and E-selectin were more frequently expressed in primary CTCL(100%, 83.3%) than in secondary CTCL(50%, 0%). 4. The positivity to ICAM-l and LFA-1 antigens was higher in primary cutaneous lymphomas (72.7%, 81.8%) than in secondary forms(9.1%, 9.1%). Conclusion : CLA and E-selectin may represent the pivotal skin-homing receptor of infiltrative tumor cells and vascular counter-receptor in primary CTCL, respectively. Also, ICAM-1 and LFA-1 may have a role in the primary cutaneous infiltration of lymphoma cells as the additional cofactors.

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