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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43846

Title: Fabrication of nano-mosquitocides using chitosan from crab shells: impact on non-target organisms in the aquatic environment
Authors: Murugan, K.;J. Anitha;D. Dinesh;U. Suresh;R. Rajaganesh;B. Chandramohan;J. Subramaniam;M. Paulpandi;C. Vadivalagan;P. Amuthavalli;L. Wang;J.-S. Hwang;H. Wei;M. S. Alsalhi;S. Devanesan;S. Kumar;K. Pugazhendy;A. Higuchi;M. Nicoletti;G. Benelli
Contributors: 國立臺灣海洋大學:海洋生物研究所
Date: 2016-06
Issue Date: 2017-11-02T08:00:36Z
Publisher: Ecotoxicology and Environmental Safety
Abstract: Abstract:Mosquitoes are arthropods of huge medical and veterinary relevance, since they vector pathogens and parasites of public health importance, including malaria, dengue and Zika virus. Currently, nanotechnology is considered a potential eco-friendly approach in mosquito control research. We proposed a novel method of biofabrication of silver nanoparticles (AgNP) using chitosan (Ch) from crab shells. Ch-AgNP nanocomposite was characterized by UV-vis spectroscopy, FTIR, SEM, EDX and XRD. Ch-AgNP were tested against larvae and pupae of the malaria vector Anopheles stephensi obtaining LC50 ranging from 3.18 ppm (I) to 6.54 ppm (pupae). The antibacterial properties of Ch-AgNP were proved against Bacillus subtilis, Klebsiella pneumoniae and Salmonella typhi, while no growth inhibition was reported in assays conducted on Proteus vulgaris. Concerning non-target effects, in standard laboratory considtions the predation efficiency of Danio rerio zebrafishes was 68.8% and 61.6% against I and II instar larvae of A. stephensi, respectively. In a Ch-AgNP-contaminated environment, fish predation was boosted to 89.5% and 77.3%, respectively. Quantitative analysis of antioxidant enzymes SOD, CAT and LPO from hepatopancreas of fresh water crabs Paratelphusa hydrodromous exposed for 16 days to a Ch-AgNP-contaminated aquatic environment were conducted. Notably, deleterious effects of Ch-AgNP contaminating aquatic enviroment on the non-target crab P. hydrodromous were observed, particularly when doses higher than 8-10ppm are tested. Overall, this research highlights the potential of Ch-AGNP for the development of newer control tools against young instar populations of malaria mosquitoes, also highlighting some risks concerned the employ of nanoparticles in aquatic environments.
Relation: 132, pp.318-328
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43846
Appears in Collections:[海洋生物研究所] 期刊論文

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