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어류의 (魚類) 척추변형에 (脊椎變形) 관한 연구 - 농약과 Cadmium 에 의해 유발된 척추변형어에 (脊椎變形魚) 대한 외형적 , 골격적 , 병리조직학적 연구
염동혁,이성규,강부현,최신석 ( Dong Hyuk Yeom,Sung Kyu Lee,Boo Hyon Kang,Shin Sok Choi ) 한국하천호수학회 1992 생태와 환경 Vol.25 No.4
Deformed fish (Oryzias latipes), induced by diazinon, fenobucarb, trifluralin and cadmium, were observed with morphological, skeletal and histopathological methods. Deformed rate showed 49.2% in diazinon, 50.0% in fenobucarb, 96.1% in trifluralin and 14.5% in cadmium. The external signs the deformed fish exposed to the test substances were haemorrahge and scoliosis in the abdominal and caudal region. The observation of the skeletal system revealed that deformity mainly occurred between the 6th and 10th vertebra and the 15th and 24th vertebra, and that fracture occurred in the middle of centrum. Histopathological findings of the deformed fish were asymmetry of the body, severe fracture and dislocation of the vertebrae and displacement and disoirentation of the myotomal musculature. In addition the levels of abnormalities were similar with one another among the deformed fish in all the groups.
송사리 ( Otyzias latipes ) 의 척추변형에 관한 연구 자연발생적인 척추변형어에 대한 외형적 , 골격적 , 병리조직학적 관찰
염동혁,강부현,이성규 ( Dong Hyuk Yeom,Boo Hyon Kang,Sung Kyu Lee ) 한국하천호수학회 1993 생태와 환경 Vol.26 No.1
The vertebral deformation of medaka(Oryzias latipes), which has occurred spontaneously in the fish breeding facility of KRICT, was studied to clarify the characteristics of deformation in terms of morphology. The rate of vertebral deformation was 0. 29%. The external signs were characterized by lordosis and kyphosis without haemorrhage. The 95 percent of deformation occured in the region between the 5th and 30th vertebra. The fracture was observed in three fish of 31 deformed fish, however it was mild in severity. The histopathological features of deformed vertebrae were characterized by mild hyperplasia of spindle and mononuclear cell, asymmetry of the body and dislocation of the vertebrae.
Dong-Hyuk Yeom(염동혁),Sung Kyu Lee(이성규) 환경독성보건학회 2006 환경독성보건학회지 Vol.21 No.4
미꾸리 (Misgurnus anguillicaudatus)에 대한 4가지 농약 (diazinon, carbaryl, fenpropathrin, myclobutanil)의 급성독성을 평가하기 위하여, 치어 및 자어 단계(postlarvaⅠ, postlarvaⅡ, 8 WPH (weeks posthatch), 16 WPH, 20 WPH, 32 WPH, 40 WPH)의 미꾸리를 사용하여 급성독성실험을 실시하였다. 각 생육단계 별로 구해진 각 실험농약의 96-hr LC50 값을 비교하여 미꾸리에 대한 급성독성이 높은 순서를 정리한 결과는 Fenproparthrin>Diazinon>Carbaryl, Myclobutanil 순으로 나타났다. 또한, 본 연구에서 사용된 4가지 농약의 독성은 미꾸리의 생육단계에 따라 차이를 나타냈다. 농약에 대한 감수성이 민감한 미꾸리의 생육단계순으로 정리하면 PostlarvaⅠ>PostlarvaⅡ, 8 WPH>16 WPH, 20 WPH, 32 WPH, 40 WPH 나타났다. 그러므로 환경관리 및 규제목적으로 미꾸리 성체를 사용하여 독성실험을 할 경우에는 독성을 과소평가 할 수도 있음을 보여주었다.
Daphnia magna 의 생존 , 번식 및 감수성에 대한 사육배지의 영향
염동혁(Dong Hyuk Yeom),이성규(Sung Kyu Lee) 한국하천호수학회 1998 생태와 환경 Vol.31 No.2
The survival and reproductive ability of Daphnia magna were compared in reconstituted hard water (RHW), reconstituted hard water+se(RHW+Se), fortified gorundwater(FGW) and autoclaved, fortified groundwater (AFGW). The susceptibility of D, magna that was cultured in each culture medium was tested using reference chemical (K_2Cr_2O_7). During the reproduction test, the 6.7% mortality was observed in FGW and AFGW. Without effects of the addition of Se, the mean time to the production of the first brood was observed on 13.0 days in the RHW and RHW+Se. However, the mean time to the production of the first brood was significantly decreased in FGW (9.7 days) and AFGW (8.7 days). The mean number of young produced per parent was increased by the addition of Se in the RHW compared to RHW itself. Since D. magna cultured in AFGW produced 150 young per parent, AFGW produced the most young daphnids among the culture media. Some differences were observed in the susceptibility of the young D. magna to potassium dichromate. The reconstituted water containing 1㎍/L Se showed the lowest 48hr-EC_50 value (0.40 mg/L) and the highest 48hr-EC_50 value (0.91 mg/L) was observed in AFGW. From these results, it was proved that AFGW was the best culture medium for D. magna among the tested culture media.
농약의 토양 표면 유출에 관한 연구-II 포장에서 인공강우에 의한 phorate의 유출특성
김균,염동혁,김정한,이성규,김용화,박창규 ( Kyun Kim,Dong Hyuk Yeom,Jeong Han Kim,Sung Kyu Lee,Yong Hwa Kim,Chang Kyu Park ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.4
Runoff of phorate, soil insecticide, were measured under simulated rainfall conditions in field using small test plot(120×120 ㎝) at the loam area and loamy sand area. Fish acute toxicity tests were performed with runoff water to elucidate its toxicological effect on organisms in ecosystem. The average concentrations of phorate in runoff water from loam and loamy sand soil were 11.3 ppb and 4.8 ppb, respectively. However, there was no significant concentration difference between the heavy and the light rain. With loam soil, average runoff rates were 1.31 and 0.18%, while with loamy sand soil those were 0.48 and 0.012% under the heavy and the light rain conditions, respectively. Total average runoff rate was 0.50%. With killifish, no mortality was observed in runoff water from loamy sand soil, whereas half of the population was dead in runoff water from loam soil when it was diluted to 54.4% content.