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Study on Preparation of Nano-modified Plant Molluscicide and Its Molluscicidal Synergistic Properties

Author: WangJiangJie
Tutor: ShenYuHua；YangXiaoHong
School: Anhui University
Course: Inorganic Chemistry
Keywords: Plant molluscicide Nanomaterials Synergies Snails Schistosoma
CLC: TQ453
Type: Master's thesis
Year: 2011
Downloads: 9
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Abstract

This thesis is based on the study of the prevention of schistosomiasis hardest hit, take full advantage of the rich local characteristics of plant resources with silver nanoparticles characteristics, first proposed the combination of inorganic / organic nanocomposites and schistosomiasis control study, explore inorganic / organic nanocomposite material the molluscicidal biological effect, broaden the range of applications of nano-science and technology, and significantly improve plant molluscicidal effect, schistosomiasis prevention and control of environmental efficiency. This is a new idea, this study not only has high academic value of innovation and distinctive local characteristics, and will play a very important positive social impact in promoting the government concerned about the people's livelihood stability. The main content of this paper is as follows:. Chizhou rich natural resources and the environment, and in recent years based on schistosomiasis contradiction of some recovery of the disaster, further in-depth understanding and study of schistosomiasis disaster prevention, the use of molluscicidal ingredients ginkgo ginkgo testa effective study the effect of the acid in snails kill by different concentrations, at different times, and the environment, come to the killing of snail and suppress fugitive conclusions; fish toxicity test, indicating that as the kinds of the of ginkgo outside of the plant origin molluscacide drugs skin and preparation than of niclosamide preparation of fish toxicity slightly more environmentally friendly; further confirmed the ginkgo exotesta in the plant molluscicide and an important role in the prevention and treatment of S. japonicum and use value of the study to the promotion and perfect ginkgo plant molluscicide important significance. 2 In this study, the use of biological templates, prepared under mild conditions in the natural nano-silver particles, by infrared analysis of the product obtained nano silver particles and biomolecules good compatibility - attraction sexual, effective formation inorganic / organic composite nanomaterials; ultraviolet spectrum of the product of the water-soluble and ethanol dispersant, can be found in the obtained nano silver product is water soluble; XRD image of the product directly to product nanoscale silver particles, and further demonstrate the product of silver and biological molecules have a good composite; above conclusion can also be embodied in a SEM of the product spectrum. Effectively and accurately the concentration of calibration, configuration, a certain series of concentrations, conducted MOLLUSCICIDAL test high molluscicidal activity, indicating that the product silver nano particles in the range of 17.6-88mg / L, the killing effect of snail 73.3-93.4%; and nano-silver higher inhibitory effect than ordinary silver, and red carp toxicity test, the concentration of nano silver product formulations to fish and aquatic areas will not produce environmental destruction, is the product of preparation of the environmental protection. 3.Select nano silver, ginkgo testa dry powder, ginkgo outer seed percutaneous ethanol the soaking solution between the different preferred prepared a series of composite molluscicides: nano-silver composite molluscicides, nano-silver / ginkgo testa powder hybrid molluscicides, nanometer silver / ginkgo testa ethanol the soaking solution the composite molluscacide ginkgo testa dry powder composite molluscicides, ginkgo testa ethanol soaking liquid composite molluscacide. Take vitality snails soak method the WHO \controls. The experimental results for composite molluscicides molluscicidal activity growth molluscicidal effect significantly over time, improve. Best nano-silver / ginkgo testa powder the composite molluscacide molluscicidal effect 36 h Oncomelania mortality rate of up to 87% the 84 h Oncomelania mortality reached 100%. The day Lo time, improve efficacy; effectively inhibit the Oncomelania climb; testa and Nano silver with ginkgo: powder with the use of, effectively reduce the concentration of the drug use, and greatly improve the molluscicidal efficacy. The study may provide further leverage the value of complex structure and formulation of the nanocomposite plant molluscicides synthesis. The prepared nanocomposite molluscicides in Oncomelania dip kill the study of the effect of the test and fish toxicity test explore the mechanism of the nanocomposite plant molluscicides for further optimization of the formulation of the the nanocomposite plant molluscicides and its molluscicidal effect providing effective utilization value. Deepen the understanding and application of the new environment schistosomiasis disaster prevention and nanocomposite plant molluscicides has important meaning and value.

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