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| Registros recuperados : 154 | |
| Registros recuperados : 154 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
31/03/2017 |
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Data da última atualização: |
24/04/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MATTOS, B. D.; ROJAS, O. J.; MAGALHAES, W. L. E. |
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Afiliação: |
BRUNO D. MATTOS, Doutorando da UFPR; ORLANDO J. ROJAS, School of Chemical Technology, Aalto University; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
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Título: |
Biogenic silica nanoparticles loaded with neem bark extract as green, slow-release biocide. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Journal of Cleaner Production, v. 142, n. 4, p. 4206-4213, Jan. 2017. |
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DOI: |
http://dx.doi.org/10.1016/j.jclepro.2016.11.183 |
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Idioma: |
Inglês |
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Conteúdo: |
Biogenic silica derived from Equisetum arvense was used as a carrier of an eco-friendly biocide consisting of a neem bark extract cross-linked with polycarboxylic acids. Infrared spectroscopy indicated the presence of ester bonds between the silica support and the loaded bark extract. Surface area analysis, porosimetry and microscopy confirmed a high level of biocide loading in the silica support. Furthermore, compared with the unloaded biogenic silica nanoparticles, a better thermal stability was determined for the system carrying the extracted compounds. Experiments consisting of three sequential release profiles showed full mass release after 20 days of unloaded neem while the extract loaded in the solid support reached only 60e75% released after 30 days. A four-fold improvement in the neem extract stability was observed in aqueous media if loaded in the silica support. The neem compounds released from silica showed a satisfactory scavenging activity over 50% of DPPH free radical, and could cause the mortality of the major workers of Acromyrmex crassispinus ant specie. |
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Palavras-Chave: |
Biocida; Eco-friendly supports; Green biocides; Kinetic models. |
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Thesagro: |
Nim. |
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Thesaurus NAL: |
Azadirachtin; Biocides; Pest control; Sustainable technology. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 01895naa a2200265 a 4500
001 2067969
005 2017-04-24
008 2017 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.jclepro.2016.11.183$2DOI
100 1 $aMATTOS, B. D.
245 $aBiogenic silica nanoparticles loaded with neem bark extract as green, slow-release biocide.$h[electronic resource]
260 $c2017
520 $aBiogenic silica derived from Equisetum arvense was used as a carrier of an eco-friendly biocide consisting of a neem bark extract cross-linked with polycarboxylic acids. Infrared spectroscopy indicated the presence of ester bonds between the silica support and the loaded bark extract. Surface area analysis, porosimetry and microscopy confirmed a high level of biocide loading in the silica support. Furthermore, compared with the unloaded biogenic silica nanoparticles, a better thermal stability was determined for the system carrying the extracted compounds. Experiments consisting of three sequential release profiles showed full mass release after 20 days of unloaded neem while the extract loaded in the solid support reached only 60e75% released after 30 days. A four-fold improvement in the neem extract stability was observed in aqueous media if loaded in the silica support. The neem compounds released from silica showed a satisfactory scavenging activity over 50% of DPPH free radical, and could cause the mortality of the major workers of Acromyrmex crassispinus ant specie.
650 $aAzadirachtin
650 $aBiocides
650 $aPest control
650 $aSustainable technology
650 $aNim
653 $aBiocida
653 $aEco-friendly supports
653 $aGreen biocides
653 $aKinetic models
700 1 $aROJAS, O. J.
700 1 $aMAGALHAES, W. L. E.
773 $tJournal of Cleaner Production$gv. 142, n. 4, p. 4206-4213, Jan. 2017.
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Embrapa Florestas (CNPF) |
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