An environmentally safe larvicide against Aedes aegypti based on in situ gelling nanostructured surfactant systems containing an essential oil.
作者： S.G. Ferreira , V.S. Conceição , N.S. Gouveia , G.S. Santos , R.L.C. Santos
DOI: 10.1016/J.JCIS.2015.06.012
关键词:
摘要: Abstract Hypothesis Liquid crystalline precursors, which are in situ gelling nanostructured surfactant systems, can undergo phase transition aqueous solution and become more structured aggregates, controlling release of larvicides acting as biotechnology alternatives for dengue control. Such systems contain bioactive substances Citrus sinensis essential oil (CSEO) exhibits biological activity against Aedes aegypti (Ae. aegypti) larvae. Experiments The formulations were composed by fixed concentration CSEO stabilized Polyoxypropylene (5) Polyoxyethylene (20) Cetyl Ether (PPG-5 CETETH-20): oleic acid (OA) 2:1, increasing water content. diagram was established structure evaluated polarized light microscopy (PLM), small angle X-ray scattering (SAXS) rheology. Median lethal determined Ae. Findings exhibited four regions: liquid crystal (LC), emulsion, microemulsion (ME) separation. PLM SAXS distinguished microemulsions, lamellar hexagonal LC structures. Flow oscillatory tests showed that content increases elasticity from Newtonian to non-newtonian behavior confirming the gelation behavior. larvicidal indicates these improved solubility medium addition potential environmental larvicide
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