2013 Fiscal Year Final Research Report
Aquatic ecological risk assessments of silver nanocolloids based on population growth analyses
| Project/Area Number |
23310026
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental impact assessment/Environmental policy
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| Research Institution | Toyo University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
TATSUTA Haruki 琉球大学, 農学部, 准教授 (50370268)
NAGASAKA Seiji 東洋大学, 生命科学部, 教授 (60534013)
HIROTSU Naoki 東洋大学, 生命科学部, 准教授 (40584389)
SAKAMOTO Masaki 富山県立大学, 工学部, 講師 (20580070)
SHIMIZU Kazuya 東洋大学, 生命科学部, 講師 (10581613)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKEI Hiroyuki 東洋大学, 生命科学部, 教授 (40520789)
KATSUMATA Masakazu 浜松ホトニクス株式会社, 中央研究所, 部員 (80394005)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | ナノマテリアル / 生態系影響評価 |
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| Research Abstract |
Minimum bactericidal concentration of silver nanocolloids (SNCs) to active sludge was 5 mg/L. Toxicities of SNCs to cyanobacteria and micro algae were comparatively high, in addition, nano-size dependent toxicity was observed. In case of SNCs exposure to aquatic plants, there was inhibition of roots growth because released Ag+ inhibited glutathione reductase and following increase of H2O2 in roots reduced catalase activity. There is no significant difference between SNCs and AgNO3 in acute mobility inhibition test of invertebrates. Main toxic factor in reproduction test of invertebrates was Ag+. In fish, it was observed that shortened body length, reduction of heart beating, ischemia and kyphosis were induced by SNCs exposure. SOD, CAT and GSH were significantly reduced, and apoptosis inhibition was observed. Moreover, intrinsic growth rate of fish was significantly decreased by SNCs exposure.
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[Presentation] 藍藻類及び原生動物に対するSNCs 曝露における影響2013
Author(s)
金沢彩子, 長坂征治, 仲亀雄哉, 有吉理, 片岡千里, 竹井弘之, 廣津直樹, 岩見徳雄, 杉浦則夫, 内海真生, 柏田祥策, 清水和哉
Organizer
第19回日本環境毒性学会研究発表会
Place of Presentation
東洋大学(東京)
Year and Date
20130907-08
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