Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Author(s):
Rosa, M. Thereza M. G. [1] ; Silva, Eric Keven [1] ; Santos, Diego T. [1] ; Petenate, Ademir J. [2] ; Meireles, M. Angela A. [1]
Total Authors: 5
Affiliation:
[1] UNICAMP Univ Campinas, Sch Food Engn, LASEFI DEA FEA, BR-13083862 Campinas, SP - Brazil
[2] IMEC UNICAMP, DE, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Food Engineering; v. 168, p. 68-78, JAN 2015.
Web of Science Citations: 11
Abstract

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)

FAPESP's process: 09/17234-9 - Obtaining anthocyanins, carotenoids, flavonoids, volatile oils, and tocotrienols by supercritical technology: process parameters and chemical characterization of extracts
Grantee:Maria Angela de Almeida Meireles Petenate
Support Opportunities: Regular Research Grants
FAPESP's process: 12/10685-8 - Combination and coupling of processes for the production and encapsulation of value-added vegetal extracts: technical and economic evaluation
Grantee:Maria Angela de Almeida Meireles Petenate
Support Opportunities: Regular Research Grants
FAPESP's process: 12/19304-7 - Brazilian ginseng biorefinery: simulation and multi-objective optimization
Grantee:Diego Tresinari dos Santos
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 10/16485-5 - Technical and economic evaluation of the integration of sustainable processes for a better use of brazilian ginseng (Pfaffia glomerata)
Grantee:Diego Tresinari dos Santos
Support Opportunities: Scholarships in Brazil - Post-Doctoral