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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Obtaining annatto seed oil miniemulsions by ultrasonication using aqueous extract from Brazilian ginseng roots as a biosurfactant

Texto completo
Autor(es):
Rosa, M. Thereza M. G. [1] ; Silva, Eric Keven [1] ; Santos, Diego T. [1] ; Petenate, Ademir J. [2] ; Meireles, M. Angela A. [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] UNICAMP Univ Campinas, Sch Food Engn, LASEFI DEA FEA, BR-13083862 Campinas, SP - Brazil
[2] IMEC UNICAMP, DE, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Journal of Food Engineering; v. 168, p. 68-78, JAN 2015.
Citações Web of Science: 11
Resumo

The purpose of this study was to produce an oil-in-water (O/W) emulsion of delta-tocotrienol-rich oil obtained from annatto seeds by a supercritical fluid extraction process. The effects of emulsification by ultrasound (US) were evaluated and compared to emulsification by dispax reactor (DR) at similar energy densities. Saponin-rich extract from Brazilian ginseng roots (BGR) was obtained from BGR by pressurized liquid extraction and used as a biosurfactant. A model O/W emulsion system was prepared with soybean oil and commercial saponin. The influence of the emulsification process, energy density, oil type, biosurfactant type and biosurfactant concentration on the size and stability of the resulting droplets was examined through the experimental design and proper statistical analysis. The results showed that US produced more stable emulsion with smaller droplet sizes in comparison with the DR device at the same energy density. In general, increasing the energy density helped to reduce the emulsion droplet size. The minimum average droplet size observed in the mini-emulsions was 0.35 mu m. The data show that both biosurfactants were capable of forming emulsions containing relatively small droplets (<0.83 um) and were rather stable (96-99%), with some creaming. The emulsion droplets also showed a surface potential of approximately 49 mV because of the adsorbed biosurfactants, which minimized the flocculation of the oil droplets. These results indicate that BGR-extracted saponin might be an attractive biosurfactant choice for emulsion formulations for use in food and beverage products. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 12/19304-7 - Biorrefinaria do ginseng brasileiro: simulação e otimização multiobjetivo
Beneficiário:Diego Tresinari dos Santos
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
Processo FAPESP: 10/16485-5 - Avaliação técnica e econômica da integração de processos sustentáveis visando um melhor aproveitamento do ginseng brasileiro (Pfaffia glomerata)
Beneficiário:Diego Tresinari dos Santos
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 09/17234-9 - Obtenção de antocianinas, carotenóides, flavonóides, óleos voláteis e tocotrienóis por tecnologia supercrítica: parâmetros de processo e caracterização química
Beneficiário:Maria Angela de Almeida Meireles Petenate
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 12/10685-8 - Combinação/acoplamento de processos para a produção e encapsulamento de extratos vegetais de alto valor agregado: avaliação técnica e econômica
Beneficiário:Maria Angela de Almeida Meireles Petenate
Linha de fomento: Auxílio à Pesquisa - Regular