지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.3
- 수록면
- 14 - 19 (6page)
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초록· 키워드
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Objectives: Titanium dioxide (TiO₂), a common nanoparticle widely used in industrial production, is one of nano-sized materials. The purpose of this study was to determine the acute and chronic toxicity of TiO₂ using different size and various concentrations on Daphnia magna.
Methods: In the acute toxicity test, four concentrations (0, 0.5, 4, and 8 mM) for TiO₂ with 250 or 500 nm and five concentrations (0, 0.25,
0.5, 0.75, and 1 mM) for TiO₂ with 21 ㎚ were selected to analyze the toxic effect to three groups of ten daphnia neonates over 96 hours. In
addition, to better understand their toxicity, chronic toxicity was examined over 21 days using 0, 1, and 10 mM for each type of TiO₂.
Results: Our results showed that all organisms died before the reproduction time at a concentration of 10 mM of TiO2. In addition, the exposure of anatase (21 ㎚) particles were more toxic to D. magna, comparing with that of anatase (250 ㎚) and rutile (500 ㎚) particles.
Conclusions: This study indicated that TiO₂ had adverse impacts on the survival, growth and reproduction of D. magna after the 21days exposure. In addition, the number of test organisms that were able to reproduce neonates gradually were reduced as the size of TiO₂ tested was decreased.
Methods: In the acute toxicity test, four concentrations (0, 0.5, 4, and 8 mM) for TiO₂ with 250 or 500 nm and five concentrations (0, 0.25,
0.5, 0.75, and 1 mM) for TiO₂ with 21 ㎚ were selected to analyze the toxic effect to three groups of ten daphnia neonates over 96 hours. In
addition, to better understand their toxicity, chronic toxicity was examined over 21 days using 0, 1, and 10 mM for each type of TiO₂.
Results: Our results showed that all organisms died before the reproduction time at a concentration of 10 mM of TiO2. In addition, the exposure of anatase (21 ㎚) particles were more toxic to D. magna, comparing with that of anatase (250 ㎚) and rutile (500 ㎚) particles.
Conclusions: This study indicated that TiO₂ had adverse impacts on the survival, growth and reproduction of D. magna after the 21days exposure. In addition, the number of test organisms that were able to reproduce neonates gradually were reduced as the size of TiO₂ tested was decreased.
목차
INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSION
CONCLUSIONS
ACKNOWLEDGEMENTS
CONFLICT OF INTEREST
REFERENCES
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UCI(KEPA) : I410-ECN-0101-2012-539-004472283