Use of Lignins from Sugarcane Bagasse for Assembling Microparticles Loaded withAzadirachta indicaExtracts for Use as Neem-Based Organic Insecticides
| Autor: | Moacir Rossi Forim, João B. Fernandes, Maria Fátima das Graças Fernandes da Silva, Everton M. da Silva, Bruno Perlatti, Vânia Gomes Zuin, Caio Marcio Paranhos da Silva, Andreia Pereira Matos, Eveline Soares Costa |
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| Rok vydání: | 2016 |
| Předmět: |
Chromatography
biology Chemistry 020209 energy fungi 02 engineering and technology General Chemistry Azadirachta Diatraea saccharalis biology.organism_classification complex mixtures High-performance liquid chromatography Biopesticide chemistry.chemical_compound 0202 electrical engineering electronic engineering information engineering Lignin Bioassay Microparticle Bagasse |
| Zdroj: | Journal of the Brazilian Chemical Society. |
| ISSN: | 0103-5053 |
| Popis: | Microcapsules of sugarcane bagasse lignin loaded with organic extracts of neem (Azadirachta indica) were prepared and evaluated as potential bioinsecticides. Lignins were extracted and modified by oxidation and acetylation reactions providing different biopolymers. Afterwards, they were characterized through several analytical techniques. The formulations were initially prepared as colloidal suspension of lignin nanoparticles, which were then spray-dried. The products were submitted to quality control protocols using high performance liquid chromatography (HPLC), thermal and photochemical degradation studies, followed by biological assays against Spodoptera frugiperda and Diatraea saccharalis. The formulations showed increases in both thermal and photo stability of approximately 40% compared with control samples. All the formulated microparticles were efficient against the insects evaluated and required a shorter time to achieve 100% mortality than the controls. The use of sugarcane bagasse lignins to prepare microparticles improved the resistance of neem extracts against abiotic factors, retaining the biological activity of this biopesticide. |
| Databáze: | OpenAIRE |
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