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과량의 아연에 의한 아프리카 발톱개구리 (Xenopus Laevis)의 배발성 이상과 독성
윤춘식 ( Chun Sik Yoon ),진정효 ( Jung Hyo Jin ),정선우 ( Seon Woo Cheong ) 한국하천호수학회 2003 생태와 환경 Vol.36 No.1
Concentrated releases of zinc into water usually results from discharges associated with industrial purpose. The released zinc into soil is corroded and released into water. In aquatic environment, exess zinc is toxic to the organisms and causes the growth inhibition and malformation of them as a heavy metal. In this study, excess zinc toxicity was tested by FETAX (frog embryo teratogenetic assay with Xenopus) as in vivo system. Xenopus embryos at st. 9 were exposed to 100~900μM of zince for 7 days and 81% of individuals were survived in 100μM, and 25% were survived in 1000 M of zinc solution. In external malformations, swelled belly and intestinal dysplasia were common, and all of tested individuals showed these malformations in 200μM or higher concentration of zinc. In 400μM or higher concentration, all of tested tadpoles showed faded heart. Also, hypo-pigmentation, lens hernia and loose digestive track were very frequently found in 100μM of zinc. The histological study with paraffin section of zinc treated tadpoles showed following abnormalities; regeneration of photoreceptor on retina, reduced vitreous chamber in eye, reduction of red blood cells in heart, abnormal liver, swelling of pronephric cell, muscle dysplasia and palatal papilloma. These abnormalities may be caused by the degeneration of mitochondria, inhibition of cell adhesion, and the formation of leghemoglobin by zinc due to the substitution of Ca^2+ by Zn^2+. The body length was reduced due to the excess zinc. From a statistical result, body lengths of 300μM or higher concentrative groups was significantly reduced comparing that of control group. Recently, many spontaneous malformations and reduction of amphibians are reported. Form the results of present study, excess zinc might be a factor of amphibian reduction, and the control of zinc discharges is very important.
한국산 도롱뇽 ( Hynobius leechii ) 의 농경지에서의 배 발생 이상과 살균제 Benomyl 의 독성효과
최영주(Yeoung Ju Choi),윤춘식(Chun Sik Yoon),박주홍(Joo Hung Park),진정효(Jung Hyo Jin),정선우(Seon Woo Cheong) 한국하천호수학회 2002 생태와 환경 Vol.35 No.3
A numerical variation and abnormalities were studied on egg bags and embryos of Korean salamander, Hynobius leechii from agricultural habitat. The teratogenic and toxic effects of fungicide benomyl were also investigated with early embryos from non-agricultural habitat. We collected 144 egg bags from agricultural region, and 3418 of early embryos were contained. The lengths of egg bags were varied from 10 to 23㎝ and the most frequent length was 19㎝. The number of embryos was varied from7 to 43, and the most frequent range was 22 to 26. Spontaneous abnormalities were occurred in 406 embryos among 116 egg bags, and 24 kinds of external abnormalities were found. Individuals showing severe external defect were histologically studied and they showed optic dyspalsia, thyroid carcinoma, somatic muscular dysplasia, partial biaxial structure, decrease of red blood cells in the heart, cephalic degeneration and intestinal dysplasia. 385 embryos from non-agricultural region were exposed to 200nM∼1μM of benomyl at blastula or gastrula for 12 days. All embryo were dead in the concentration of 1μM(LD_100) and 75% of embryos were dead in 800 nM of benomyl. Specific effect due to benomyl was acrania or cephalic dysplasia and this result suggests that the benomyl inhibit strongly to the development of neural tissue. These abnormal developments may be caused by antimitotic action, inhibition of tubulin complex, destruction of microtubule, inhibitions of neurulation and closing of neural fold, and by the inhibition of the movement of neural crest cells.
정선우,진정효,전주아 昌原大學校 基礎科學硏究所 2000 基礎科學硏究所論文集 Vol.12 No.-
The insect fauna from the district of Mt. Hwaak was studied. Specimens were collected from April to October of 1998. The total specimens were classified into 9 orders, 70 families, and 300 species. In Dermaptera, 1 families 1 species were identified. In Odonata, 1 families 3 species were collected, and 7 families 13 species were contained in Homoptera. In Hemiptera, 11 families 22 species were classified, and 5 families 10 species were classified in Orthoptera. Diptera held 6 families 9 species, Hymenoptera had 8 families 20 species, and Coleoptera had 8 families 44 species. And we could classified 23 families 176 species in Lepidoptera.