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.
이용수
초록· 키워드
오류제보하기
Manufactured nanomaterials (NMs) are used for various purposes, e.g., as catalysts in chemical reactions, drug delivery devices and consumer products such as sunscreens and cosmetics. Concerns about the potential ecotoxicological effects of NMs are increasing in part because they might have different toxicological characteristics from their larger counterparts. In the present study, we investigated the effects of particle size and UV light on the toxicity of fullerene.
Methods: Two aquatic invertebrates, Daphnia magna and Moina macrocopa, were employed for toxicity tests. By exposure to 4 hr/d sunlight exposure, phototoxicity of fullerene by environmental level of ultraviolet (UV) lights was tested. Aquatic toxicities of stable colloidal suspensions of fullerene aggregates in water (aqu/nC<SUB>60</SUB>) filtered through a 0.2 ㎛ and 0.45 μm filters were compared. Images of the particle were recorded using transmission-electron microscopy, and changes in catalase (CAT) activity were determined in D. magna juveniles after being exposed to sublethal levels of aqu/nC60 and environmental level of UV lights.
Results: Exposure to aqu/nC<SUB>60</SUB> filtered through 0.2 ㎛ filters under environmental level of ultraviolet light was more detrimental to D. magna and M. macrocopa. Antioxidant enzyme activities were increased by coexposure to aqu/nC<SUB>60</SUB> and by sunlight.
Conclusion: Exposure to fullerene leads to oxidative damage to D. magna and it was aggravated by natural sunlight. Further assessment for sublethal effects of fullerene under environmentally relevant conditions should be followed.
Methods: Two aquatic invertebrates, Daphnia magna and Moina macrocopa, were employed for toxicity tests. By exposure to 4 hr/d sunlight exposure, phototoxicity of fullerene by environmental level of ultraviolet (UV) lights was tested. Aquatic toxicities of stable colloidal suspensions of fullerene aggregates in water (aqu/nC<SUB>60</SUB>) filtered through a 0.2 ㎛ and 0.45 μm filters were compared. Images of the particle were recorded using transmission-electron microscopy, and changes in catalase (CAT) activity were determined in D. magna juveniles after being exposed to sublethal levels of aqu/nC60 and environmental level of UV lights.
Results: Exposure to aqu/nC<SUB>60</SUB> filtered through 0.2 ㎛ filters under environmental level of ultraviolet light was more detrimental to D. magna and M. macrocopa. Antioxidant enzyme activities were increased by coexposure to aqu/nC<SUB>60</SUB> and by sunlight.
Conclusion: Exposure to fullerene leads to oxidative damage to D. magna and it was aggravated by natural sunlight. Further assessment for sublethal effects of fullerene under environmentally relevant conditions should be followed.
목차
Abstract
Introduction
Materials and Methods
Results
Discussion
Conclusion
References
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UCI(KEPA) : I410-ECN-0101-2016-517-000925196