Navegando por Assunto "Astrocaryum vulgare"

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Acesso aberto (Open Access)
Comparative study on the quality of oil extracted from two tucumã varieties using supercritical carbon dioxide
(Universidade Federal do Pará, 2016-06) COSTA, Bárbara Elizabeth Teixeira; SANTOS, Orquídea Vasconcelos dos; CORRÊA, Nádia Cristina Fernandes; FRANÇA, Luiz Ferreira de
The vast Amazon region has considerable territorial peculiarities and plant species diversity, sometimes from the same botanical family, which can exhibit significant differences in physicochemical properties. From this diversity, two species stand out – Amazonas tucumã (Astrocaryum aculeatum Meyer) and Pará tucumã (Astrocaryum vulgare Mart.). The research focus is to analyze, comparatively, these oleaginous fruits, their similarities, particularities and potentials regarding the oil quality extracted from two tucumã varieties from the states of Amazonas and Pará, obtained using supercritical carbon dioxide, under different extraction parameters. The results demonstrate the biometric particularities of each species, highlighting the Amazon fruit, which also showed higher oil yield using supercritical CO2 extraction. The fatty acid quality and profile aspects of the oils show their unsaturated predominance, considering carotenoid content and how the extraction temperature can influence the nutritional quality of the oils. The statistical analyses indicated that the Amazon tucumã oil is superior to the Pará tucumã oil. However, in terms of added value both oils have potential applications in various industrial segments.
Acesso aberto (Open Access)
Extração do óleo de tucumã-do-Pará (Astrocaryum vulgare) usando CO2 supercrítico visando o aumento de escala
(Universidade Federal do Pará, 2022-04-04) MENEZES, Eduardo Gama Ortiz; CARVALHO JÚNIOR, Raul Nunes de; http://lattes.cnpq.br/5544305606838748; https://orcid.org/0000-0002-4433-6580
With the growing worldwide demand for products and wealth generation, there is a need to invest in new sustainable processes and engineering practices for scale expansion. Thus, the objective of this work was to obtain β-carotene-rich tucumã-do-Pará (Astrocaryum vulgare) oil using supercritical CO2 and to verify the adequacy of two new scale-up equations. Therefore, two isotherms and three pressures (40°C, 60°C, 150bar, 250bar, 400bar) were used. In the condition that presented the highest oil and β-carotene extraction yield, a kinetic study was carried out, followed by the application of a new equation based on Buckingham's π theorem. The highest oil extraction yield (31.49±0.04%) was obtained at 60°C and 400bar with a high concentration of oleic acid, and this yield was similar to the value obtained by soxhlet, which was 32.73±0, 59% oil. The application of the Tukey test (p <0.05) shows that there is no significant difference between the extraction yield obtained in the isotherm of 40 °C and 60 °C in the pressure condition of 400bar. The highest concentration of β-carotene (1351.8±0.02 μg/g) was obtained at 40°C and 400bar, and the solvent density was considered the most significant variable with the greatest influence on β-carotene extraction. The kinetic study carried out with the application of a new mathematical proposal based on the correlation between operational variables (solvent flow, feed mass, height and diameter of the extraction bed), mass transfer mechanism and constancy of the inclination angle of the kinetic curves that , for a solvent flow rate of 10.93 g/min, on the larger scale, the diffusive step controlled the mass transfer mechanism.