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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agroindústria de Alimentos. Para informações adicionais entre em contato com ctaa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
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Data corrente: |
18/05/2023 |
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Data da última atualização: |
11/12/2023 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
COSTA, A. M. M.; GIUDICE, O. B. S.; ALVES, J.; PINTO, J. C. C. DA S.; LIMA, J. P.; BIZZO, H. R.; CABRAL, L. M. C.; TONON, R. V. |
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Afiliação: |
ANDRÉ MESQUITA MAGALHÃES COSTA, UFRJ; OLAVO BITTENCOURT SILVA GIUDICE, UNESA; JESSICA ALVES, UFRJ; JOSÉ CARLOS COSTA DA SILVA PINTO, UFRJ; JANINE PASSOS LIMA, CTAA; HUMBERTO RIBEIRO BIZZO, CTAA; LOURDES MARIA CORREA CABRAL, CTAA; RENATA VALERIANO TONON, CTAA. |
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Título: |
Ultrasound production of alginate-based essential oil nanoemulsions for food preservation. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
In: CONFERÊNCIA INTERNACIONAL DE PROTEÍNAS E COLOIDES ALIMENTARES, 9., 2023, Rio de Janeiro. Anais eletrônicos... Campinas: Galoá, 2023. |
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Idioma: |
Inglês |
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Notas: |
Poster 157675. Eixo temático: Colóides para filmes comestíveis. CIPCA. |
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Conteúdo: |
ssential oils are natural preservatives rich in compounds with antimicrobial and antioxidant properties, which can be applied in the form of emulsions in active coatings aiming at improving foods? shelf life. Droplet size reduction to the nanoscale (< 200 nm) may improve emulsion stability, transparency, and antimicrobial activity. In the case of high-moisture foods, such as fish and meat, alginate-stabilized emulsions are a good alternative to be applied in active coatings, since they can turn into gels when reticulated by divalent cations. The objective of the study was to develop alginate-based nanoemulsions of three types of essential oils (thyme (Thymus vulgaris), lemongrass (Cymbopogon citratus), and oregano (Origanum vulgare)), with potential to be applied in active coatings and films, and to compare their physical properties with conventional emulsions. Essential oils? chemical composition (GC-MS), antioxidant capacity (TEAC), and antimicrobial activity against Salmonella Typhimurium and Pseudomonas aeruginosa were investigated. Three coarse emulsions of each oil (thyme: T-CE, lemongrass: L-CE, and oregano: O-CE) containing water, sodium alginate (1%), essential oil (1%), and Tween 80 (1%) were prepared using an Ultra-Turrax at 10,000 rpm for 3 min; these emulsions were then homogenized with an ultrasonic probe (1 min/150 W) in order to produce the nanoemulsions (thyme: T-NE, lemongrass: L-NE, and oregano: O-NE). Oil droplet size, polydispersity index, and zeta potential were evaluated in the nanoemulsions and their respective emulsions. Thymol (44%), Geranial (43.7%), and Carvacrol (70.9%) were the main components of thyme, lemongrass and oregano, respectively. Oregano showed a higher antioxidant capacity (278,068 µmol TE/100 g oil). All oils showed antimicrobial activity against Salmonella Typhimurium and Pseudomonas aeruginosa. Size analysis indicated that T-CE, T-NE and L-NE were in the nanoscale and the ultrasound treatment significantly reduced the mean oil droplet of lemongrass samples (L-CE: 585 ± 44 nm vs L-NE: 147 ± 15 nm). The distinct effect of ultrasound treatment on samples droplet size could be related to the oils? varied chemical composition. Each oil has a specific affinity with the applied emulsifier, which affect its ability to reduce interfacial tension, inhibiting droplet disruption. Ultrasound treatment reduced the polydispersity index in thyme (T-CE: 0.48 ± 0.03 vs T-NE: 0.39 ± 0.06) and lemongrass (L-CE: 0.49 ± 0.04 vs L-NE: 0.40 ± 0.04) nanoemulsions, suggesting that this high-energy homogenization method was able to reduce oil droplet size variations. O-CE (-58 ± 3 mV) and O-NE (-59 ± 3 mV) showed the highest zeta potential, while L-CE (-45 ± 3 mV) showed the lowest one, which can be also attributed to the oils distinct chemical composition that could influence oils droplets charges. Ultrasound treatment did not affect samples? zeta potential. Oils characterization indicated their potential use as active ingredients in the development of alginate-based active coatings with antioxidant and antimicrobial activity. Ultrasound treatment reduced L-NE oil droplet size and promoted a more homogeneous oil droplet size distribution in thyme and lemongrass samples. The next steps include the investigation of nanoemulsions? physical and chemical properties, antimicrobial activity, and application in fish fillets after alginate reticulation. Menosssential oils are natural preservatives rich in compounds with antimicrobial and antioxidant properties, which can be applied in the form of emulsions in active coatings aiming at improving foods? shelf life. Droplet size reduction to the nanoscale (< 200 nm) may improve emulsion stability, transparency, and antimicrobial activity. In the case of high-moisture foods, such as fish and meat, alginate-stabilized emulsions are a good alternative to be applied in active coatings, since they can turn into gels when reticulated by divalent cations. The objective of the study was to develop alginate-based nanoemulsions of three types of essential oils (thyme (Thymus vulgaris), lemongrass (Cymbopogon citratus), and oregano (Origanum vulgare)), with potential to be applied in active coatings and films, and to compare their physical properties with conventional emulsions. Essential oils? chemical composition (GC-MS), antioxidant capacity (TEAC), and antimicrobial activity against Salmonella Typhimurium and Pseudomonas aeruginosa were investigated. Three coarse emulsions of each oil (thyme: T-CE, lemongrass: L-CE, and oregano: O-CE) containing water, sodium alginate (1%), essential oil (1%), and Tween 80 (1%) were prepared using an Ultra-Turrax at 10,000 rpm for 3 min; these emulsions were then homogenized with an ultrasonic probe (1 min/150 W) in order to produce the nanoemulsions (thyme: T-NE, lemongrass: L-NE, and oregano: O-NE). Oil droplet size, polydispersity index, and zeta poten... Mostrar Tudo |
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Palavras-Chave: |
Active coatings. |
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Thesaurus Nal: |
Essential oils; Nanoemulsions. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 04294nam a2200241 a 4500
001 2153810
005 2023-12-11
008 2023 bl uuuu u00u1 u #d
100 1 $aCOSTA, A. M. M.
245 $aUltrasound production of alginate-based essential oil nanoemulsions for food preservation.$h[electronic resource]
260 $aIn: CONFERÊNCIA INTERNACIONAL DE PROTEÍNAS E COLOIDES ALIMENTARES, 9., 2023, Rio de Janeiro. Anais eletrônicos... Campinas: Galoá$c2023
500 $aPoster 157675. Eixo temático: Colóides para filmes comestíveis. CIPCA.
520 $assential oils are natural preservatives rich in compounds with antimicrobial and antioxidant properties, which can be applied in the form of emulsions in active coatings aiming at improving foods? shelf life. Droplet size reduction to the nanoscale (< 200 nm) may improve emulsion stability, transparency, and antimicrobial activity. In the case of high-moisture foods, such as fish and meat, alginate-stabilized emulsions are a good alternative to be applied in active coatings, since they can turn into gels when reticulated by divalent cations. The objective of the study was to develop alginate-based nanoemulsions of three types of essential oils (thyme (Thymus vulgaris), lemongrass (Cymbopogon citratus), and oregano (Origanum vulgare)), with potential to be applied in active coatings and films, and to compare their physical properties with conventional emulsions. Essential oils? chemical composition (GC-MS), antioxidant capacity (TEAC), and antimicrobial activity against Salmonella Typhimurium and Pseudomonas aeruginosa were investigated. Three coarse emulsions of each oil (thyme: T-CE, lemongrass: L-CE, and oregano: O-CE) containing water, sodium alginate (1%), essential oil (1%), and Tween 80 (1%) were prepared using an Ultra-Turrax at 10,000 rpm for 3 min; these emulsions were then homogenized with an ultrasonic probe (1 min/150 W) in order to produce the nanoemulsions (thyme: T-NE, lemongrass: L-NE, and oregano: O-NE). Oil droplet size, polydispersity index, and zeta potential were evaluated in the nanoemulsions and their respective emulsions. Thymol (44%), Geranial (43.7%), and Carvacrol (70.9%) were the main components of thyme, lemongrass and oregano, respectively. Oregano showed a higher antioxidant capacity (278,068 µmol TE/100 g oil). All oils showed antimicrobial activity against Salmonella Typhimurium and Pseudomonas aeruginosa. Size analysis indicated that T-CE, T-NE and L-NE were in the nanoscale and the ultrasound treatment significantly reduced the mean oil droplet of lemongrass samples (L-CE: 585 ± 44 nm vs L-NE: 147 ± 15 nm). The distinct effect of ultrasound treatment on samples droplet size could be related to the oils? varied chemical composition. Each oil has a specific affinity with the applied emulsifier, which affect its ability to reduce interfacial tension, inhibiting droplet disruption. Ultrasound treatment reduced the polydispersity index in thyme (T-CE: 0.48 ± 0.03 vs T-NE: 0.39 ± 0.06) and lemongrass (L-CE: 0.49 ± 0.04 vs L-NE: 0.40 ± 0.04) nanoemulsions, suggesting that this high-energy homogenization method was able to reduce oil droplet size variations. O-CE (-58 ± 3 mV) and O-NE (-59 ± 3 mV) showed the highest zeta potential, while L-CE (-45 ± 3 mV) showed the lowest one, which can be also attributed to the oils distinct chemical composition that could influence oils droplets charges. Ultrasound treatment did not affect samples? zeta potential. Oils characterization indicated their potential use as active ingredients in the development of alginate-based active coatings with antioxidant and antimicrobial activity. Ultrasound treatment reduced L-NE oil droplet size and promoted a more homogeneous oil droplet size distribution in thyme and lemongrass samples. The next steps include the investigation of nanoemulsions? physical and chemical properties, antimicrobial activity, and application in fish fillets after alginate reticulation.
650 $aEssential oils
650 $aNanoemulsions
653 $aActive coatings
700 1 $aGIUDICE, O. B. S.
700 1 $aALVES, J.
700 1 $aPINTO, J. C. C. DA S.
700 1 $aLIMA, J. P.
700 1 $aBIZZO, H. R.
700 1 $aCABRAL, L. M. C.
700 1 $aTONON, R. V.
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Embrapa Agroindústria de Alimentos (CTAA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
15/12/2009 |
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Data da última atualização: |
01/02/2010 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
PADOVAN, M. P.; MOTTA, I. de S.; URCHEI, M. A.; HERNANI, L. C.; CARVALHO, K. N. de C.; SAGRILO, E.; ARMANDO, M. S.; RANGEL, M. A. S. |
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Afiliação: |
Milton Parron Padovan, CPAO; Ivo de Sá Motta, CPAO; Mário Artemio Urchei, CPAO; Luiz Carlos Hernani, CPAO; Karina Neoob de Castro Carvalho, CPAO; Edvaldo Sagrilo, CPAMN; Márcio Silveira Armando, EMBRAPA; Marco Antonio Sedrez Rangel, CNPMF. |
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Título: |
A pesquisa e desenvolvimento sob enfoque agroecológico na Embrapa Agropecuária Oeste: um processo em construção. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE AGROECOLOGIA, 6.; CONGRESSO LATINO-AMERICANO DE AGROECOLOGIA, 2., 2009, Curitiba. Agricultura familiar e camponesa: experiências passadas e presentes construindo um futuro sustentável: [anais...]. Curitiba: ABA: SOCLA, 2009. p. 4255-4259. 1 CD-ROM. |
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Idioma: |
Português |
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Notas: |
pdf 4072. |
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Conteúdo: |
Os trabalhos de P&D na Embrapa Agropecuária Oeste voltados à Agroecologia iniciaram-se em 2005, a partir de demandas apresentadas pelas organizações dos agricultores familiares de Mato Grosso do Sul. As atividades de P&D são pautadas,
predominantemente, em metodologias participativas, porém são desenvolvidos trabalhos
orientados por metodologias convencionais. Nesse período, ações de pesquisa vêm sendo desenvolvidas, a partir de arranjos internos e interinstitucionais, bem como em redes locais de P&D, no âmbito de MS e interestaduais. Nesse contexto, destacam-se algumas parcerias: organizações de agricultores familiares, incluindo-se movimentos sociais, instituição de extensão rural, outras unidades da Embrapa e universidades. Alguns resultados já obtidos são a reprodução de arranjos agroecológicos pelos agricultores, conduzidos em ações participativas de P&D e indicações preliminares de espécies de adubos verdes e espécies arbóreas nativas para SAFs, ambos para diferentes ecorregiões de MS. |
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Palavras-Chave: |
Pesquisa participativa; Processo agroecológico. |
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Thesagro: |
Agricultura Familiar. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02020naa a2200253 a 4500
001 1656424
005 2010-02-01
008 2009 bl uuuu u00u1 u #d
100 1 $aPADOVAN, M. P.
245 $aA pesquisa e desenvolvimento sob enfoque agroecológico na Embrapa Agropecuária Oeste$bum processo em construção.
260 $c2009
500 $apdf 4072.
520 $aOs trabalhos de P&D na Embrapa Agropecuária Oeste voltados à Agroecologia iniciaram-se em 2005, a partir de demandas apresentadas pelas organizações dos agricultores familiares de Mato Grosso do Sul. As atividades de P&D são pautadas, predominantemente, em metodologias participativas, porém são desenvolvidos trabalhos orientados por metodologias convencionais. Nesse período, ações de pesquisa vêm sendo desenvolvidas, a partir de arranjos internos e interinstitucionais, bem como em redes locais de P&D, no âmbito de MS e interestaduais. Nesse contexto, destacam-se algumas parcerias: organizações de agricultores familiares, incluindo-se movimentos sociais, instituição de extensão rural, outras unidades da Embrapa e universidades. Alguns resultados já obtidos são a reprodução de arranjos agroecológicos pelos agricultores, conduzidos em ações participativas de P&D e indicações preliminares de espécies de adubos verdes e espécies arbóreas nativas para SAFs, ambos para diferentes ecorregiões de MS.
650 $aAgricultura Familiar
653 $aPesquisa participativa
653 $aProcesso agroecológico
700 1 $aMOTTA, I. de S.
700 1 $aURCHEI, M. A.
700 1 $aHERNANI, L. C.
700 1 $aCARVALHO, K. N. de C.
700 1 $aSAGRILO, E.
700 1 $aARMANDO, M. S.
700 1 $aRANGEL, M. A. S.
773 $tIn: CONGRESSO BRASILEIRO DE AGROECOLOGIA, 6.; CONGRESSO LATINO-AMERICANO DE AGROECOLOGIA, 2., 2009, Curitiba. Agricultura familiar e camponesa: experiências passadas e presentes construindo um futuro sustentável: [anais...]. Curitiba: ABA: SOCLA, 2009. p. 4255-4259. 1 CD-ROM.
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