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북쪽말똥성게 (Strongylocentrotus intermedius) 배아(embryo)를 이용한 중금속에 대한 민감도 비교
류태권(Tae-Kwon Ryu),황인영(In-Young Hwang),이택견(Taek-Kyun Lee),윤준헌(Junheon Yoon),이창훈(Chang-Hoon Lee) 환경독성보건학회 2010 환경독성보건학회지 Vol.25 No.1
Discharged materials from the point or non-point source are released into the sea, and as the results, marine environment is directly affected. We must estimate the impacts of contaminants to marine pollution rapidly and accurately. Therefore, it is needed on early warning system for appreciating marine environmental impacts, and required a bioassay to evaluate abnormal changes. A bioassay test was developed to examine the effects of heavy metal contaminants on the early life stages of the marine annimals. We have studied the effects of metals on early development of a sea urchin species, Strongylocentrotus intermedius. S. intermedius embryos were tested with six metals (Cu, Ag, Zn, Cd, Cr, Ni) and showed the highest sensitivity to Cu as well as the lowest sensitivity to Cd. The order of biological impact for metals was Cu > Ag > Ni > Zn > Cr > Cd. In accordance with the results, sea urchins embryos can provide biological criteria for seawater quality assessment. The sensitivity of developmental bioassay whith S. intermedius is at intermediate level among marine organisms commonly used in aquatic bioassays. And this sea urchin can be routinely employed as a test organism for ecotoxicity assays.
다양한 시험생물종을 이용한 산업폐수 생태독성 평가 및 원인물질 탐색
류태권(Tae-Kwon Ryu),조재구(Jae-Gu Cho),김경태(Kyung-Tae Kim),양창용(Chang-Yong Yang),정기은(Ki-Eun Joung),윤준헌(Junheon Yoon),최경희(Kyunghee Choi) 환경독성보건학회 2010 환경독성보건학회지 Vol.25 No.3
Toxicity identification and quantification are important factors to evaluate the effect of industrial effluent on the aquatic environment. In order to measure the potential and real toxicity of mixed chemicals in the effluents. the biological method (i.e., WET test) should be used as well as chemical analysis method. In this study, we conducted WET test for various kinds of industrial effluents using aquatic organisms such as water flea (Daphnia magna), algae (Pseudokirchneriella subcapitatai, fish (Oryzias talipes, Danio rerio), and microorganism (Vibrio fisheri). In addition, we carried out chemical analysis and TIE (Toxicity Identification Evaluation) for effluents in order to identify the substances causing toxicity. Among the 30 kinds of wastewater, S13 showed the highest eco-toxicity and Ca²? and Cl? ion were suspected as major compounds causing toxicity for aquatic organisms. In order to confirm these suspected compounds, various confirmation procedures need to be carried out.
유수식 연속노출장비를 이용한 과불화화합물(PFOS, PFOA)이 송사리(Oryzias latipes) 알의 초기발생과정에 미치는 영향 연구
조재구(Jae-Gu Cho),김경태(Kyung-Tae Kim),류태권(Tae-Kwon Ryu),박유리(Yuri Park),윤준헌(Junheon Yoon),이철우(Chul-woo Lee),김현미(Hyun-Mi Kim),최경희(Kyunghee Choi),정기은(Ki-Eun Jung) 환경독성보건학회 2010 환경독성보건학회지 Vol.25 No.2
Perfluorinated chemicals (PFCs) is a kinds of persistent organic pollutants, and have the potential toxicity of which is causing great concern. In this study, we employed Oryzias latipes embryos to investigate the developmental toxicity of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA)s compound using flow-throw system for 14 day. O. latipes embryos were exposed to solvent control, 20, 40 and 80 ㎎/L of PFOS and 62.5, 130,260 ㎎/L of PFOA respectively. After exposure, hatchability, mortality, total length and heart beats were examined. Hatching rates were reduced approximately 27% in the 80 ㎎/L PFOS-treated group and 17% in the 62.5, 130 ㎎/L PFOA-treated groups. Heart beats in the PFOS-treated groups were reduced at 7 day but, PFOA-treated groups were increased heart beats. 80 ㎎/L PFOS treated group showed significant reduction in growth (total length) level to 90% of control. But PFOA did not showed significant effect on growth. In the 14 days LC<SUB>50</SUB> of PFOS and PFOA was 22.74 ㎎/L and 173 ㎎/L, respectively. The overall results indicated that the early stage of O. latipes might be a reliable model for the testing of developmental toxicity to perfluorinated chemicals.
김소정(Kim, So-Jung),이건섭(Lee, Gun-Sup),모상현(Moh, Sang-Hyun),박종범(Park, Jongbum),오정균(Auh, Chung-Kyoon),정영재(Chung, Young-Jae),류태권(Ryu, Tae Kwon),이택견(Lee, Taek-Kyun) 한국산학기술학회 2013 한국산학기술학회논문지 Vol.14 No.6
갈조류(미역, 톳, 다시마), 홍조류(김, 꼬시래기) 및 녹조류(파래) 등 식용해조류 6종으로부터 제조한 추출물의 페놀성 화합물 함량과 항산화 활성을 분석하였다. 추출수율은 꼬시래기 분말을 물(pH 8.0)을 용매로 추출하였을 때 가장 높았으며(44.23 %), 페놀성 화합물은 톳을 75 % 에탄올 용액으로 추출하였을 때 가장 높았다(52.82 μg/mg). 25 % 에탄올 용액으로 추출한 파래 추출물에서 가장 높은 DPPH 라디칼 소거활성이 나타났으며(19.29 %), superoxide 음 이온 소거활성은 다른 해조류 추출물에 비해 물(pH 8.0)로 추출한 톳 추출물(81.20 %)에서 더 높았다. 6종의 식용해 조류 추출물에서의 페놀성 화합물의 함량은 항산화 활성과 강하게 상관관계를 보였다(R2=0.852). 종합해 보면, 이러한 결과는 갈조류인 톳이 천연 항산화제 개발을 위한 좋은 원료가 될 수 있음을 의미한다. Phenolic contents and antioxidant activities were determined in the water and ethanol extracts from six species of edible seaweeds, Phaeophyceae (Laminaria japonica, Hizikia fusiformis and Undaria pinnatifida), Rhodophyceae (Porphyra tenera and Gracilaria verrucosa) and Chlorophyceae (Ulva lactuca). The highest extraction yield was observed in water extract (pH 8.0) of G. verrucosa (44.23 %) and phenolic content was the highest in ethanolic (75 %) extract of H. fusiformis (52.82 μg/mg). 25 % ethanolic extract from U. lactuca was found to have the highest DPPH radicals scavenging activity(19.29 %) and superoxide anion scavenging activitiy was higher in water extract (pH 8.0) from H. fusiformis (81.20 %) than that other seaweeds. Phenolic contents were strongly correlated with antioxidant activity in the six edible seaweeds extracts (R2=0.852). Taken together, these results indicate that H fusiformis may be a excellent source for development of natural antioxidants.
박정규,정흥배,문성환,류태권,류제영,황인영 한국환경독성학회 2001 환경독성보건학회지 Vol.16 No.4
1. 금호강물에 대한 상대독성과 수온, 전기전도도의 경우 달서천 내부, 금호강과 달서천의 합류점 하부, 합류점 상부 순으로 값의 크기를 보였고 pH의 경우 역순을 보이므로 달서천이 금호강과 달서천 합류점 하부에 영향을 주는 것으로 사료된다. 2. 금호강 하천수에 대한 Microtox 독성값과 온도, pH, 전기전도도의 상관성은 없었으므로 기존의 일반적인 몇 가지 수질 인자로는 독성변화 및 수준을 판단할 수 없다고 사료된다. 3. 36시간 연속 모니터링을 통해 짧은 시간에도 독성값이 달라지는 것으로 보아 수질의 독성 수준이나 오염 수준을 판단하기 위해서는 연속적인 독성 조사 및 분석이 필요하다고 사료된다. 4. 하천수에 대한 연속 모니터링만으로는 하천 생태 위해도를 평가하기는 어렵다. 따라서, 하천 퇴적물에 대한 특성을 병행하여 조사 분석하는 것이 유해화학물질에 의한 하천 오염을 평가하는 방법이 된다고 사료된다. The main point source of pollution of the Keumho river in Taegu, Korea, stems from waste from the areas of industrial complexes. Although it is widely accepted that pollutants in waste water negatively effects general water quality, it is difficult to evaluate the effluent effect because of varying conditions in ambient water and inconclusive knowledge of causative pollutants. To analyze the water in relation to the industrial effluent in the area, pH, temperature, conductivity, and Microtox toxicity of various river samples were measured. Water samples were collected every 2 hours for 36 hours from Keumho river and Dalseo stream. Data from continuous monitoring for 36 hours showed that effluent in Keumho river originated from Dalseo stream, which is near adjacent to industrial complexes. Change in toxicity and other factors tested during the 36 hours indicated that continuous monitoring was necessary for a satisfactory effluent toxicity test. Furthermore, in addition to water quality monitoring, it was concluded that sediment toxicity also needed to evaluate effluent effects.
국내 하천 퇴적물 건강성평가를 위한 Microtox 독성시험 조건확립 연구
정홍배,박정규,문성환,류태권,김소정,배철한,황인영 한국환경독성학회 2001 환경독성보건학회지 Vol.16 No.4
1. 하천 퇴적물 공극수, 증류수 추출용액 및 유기용매 추출액을 pH6.0~6.5 범위로 조절한 후 Microtox 독성을 측정하는 것이 퇴적물내의 암모니아 독성이 배제된, 유해화학물질 오염에 의한 퇴적물 독성을 평가하는 방안임을 확인하였다. 2. 퇴적물에 대해 공극수, 증류수 추출물, 유기용매 추출물 구분하여 Microtox 독성을 구하는 것이 퇴적물 내 유해화학물질의 독성발현 특성을 예측할 수 있는 기법이라고 사료된다. 3. 조사정점 내 시료 채취 지점간 독성에 편차로 인하여, 동일 정점의 반경 50~100m 내에서 최소 4지점 이상의 퇴적물을 확보하는 것이 해당 정점의 독성 대표값을 산출할 수 있는 방안이 된다고 판단된다. 4. 한강수계인 남한강 지천인 복하천과 양화천, 금강수계인 청주 미호천, 대전 갑천, 낙동강수계인 대구 금호강, 영산강수계인 황룡강 그리고 익산 만경강을 대상으로 한 예비 조사한 결과, 집중연구대상 하천으로의 조건은 금호강이 가장 우수하였다. 5. 하천 퇴적물의 증류수 추출액과 유기용매 추출액의 Microtox 독성값 간의 상호 상관성이 높았다. 그러나, 농축 과정이 용이하므로 정점간 비교를 위한 독성 측정시 유기용매 추출액을 사용하는 것이 바람직하다고 사료되었다. Six rivers were selected as preliminary screening sites to determine the test conditions of Microtox in assessing the toxicity of the sediment. In addition, a pH range of 6.0--6.5 was established in testing pore water, aqueous extracts and organic extracts. Each extractable fraction of sediment showed different toxicities. Therefore, in order to properly examine the toxicity in the sediment, all extractable fractions of sediment samples needed to be tested with Microtox. Thus, sediment samples were additionally collected from at least 4 secondary sites within 50~100 m area of the primary sampling site to reduce any variation or deviation in toxicity assessment. From all sediment toxicity data that was collected from this study, it was concluded that the Keumho river was the most polluted with the highest sediment toxicity of all the rivers analyzed and needed further detailed research on its pollution problem.