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Seminário de óptica da próxima terça-feira, 23 de outubro

O Seminário de Óptica da próxima terça-feira, 23 de outubro será apresentado pela Dra. Audrey N. de Andrade (Departamento de Física/UFPE).

19/10/2018 14:50 Prof. Leonardo de S. Menezes
O Seminário de Óptica da próxima terça-feira, 23 de outubro (14 horas, no Auditório do Departamento de Física/UFPE) será apresentado pela Dra. Audrey N. de Andrade (Departamento de Física/UFPE).
 

Título: Development and applications of silver nanolarvicides for vector control ofAedes aegypti in the transmission area of ZIKAV

 
Resumo: Silver nanoparticles (AgNPs) receive great attention because of their unique characteristics and applications from basic to applied sciences. Recently, studies have also shown applications as larvicides against Aedes aegypti larvae, which generates great interest in public health due to the annual outbreaks Zika virus in Brazil, and all the associated consequences. We synthesized AgNP, usingpolymethacrylic acid (PMAA) as a stabilizing and reducing agent catalyzed by ultraviolet radiation. The synthesis is clean, quick and low cost, leading to AgNPs with 10 nm average size. Their use as nanolarvicide against Aedes aegypti in laboratory and field simulation will be reported. To check the Ag NPs efficiency as larvicide pilot bioassays were performed, in which 20 fourth-instar larvae were placed in 100 ml of water with small concentrations of AgNPs (0.02 to 1.1 ppm). It was observed the mortality of the larvae from 6h and maximum expression of 24h exposure. The values LC50 and CL90 are 0.027, 0.044 ppm, respectively were recorded after 24 hours of exposure. For the simulated field test, the initial efficacy, estimated by larval mortality in the first 96 hours after application of the product, was performed using 50 young instar-L1/recipient (20 liters). It was observed 100% mortality of the larvae in L1-instar in 96 h of exposure of the nanoparticles. The persistence of mortality of the larvae in the L1-instar was observed up to the present moment by five months of exposure of the nanoparticles.
 
O seminário será ministrado em português. 
Data da última modificação: 19/10/2018, 14:53

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