| Autor: |
Luiza H. P. Domingues, Matheus S. T. Arantes, Geovana S. Marques, Charles W. I. Haminiuk, Eliton Fontana, Vitor R. da Silva |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
AIMS Molecular Science, Vol 11, Iss 1, Pp 42-60 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2372-0301 |
| DOI: |
10.3934/molsci.2024003?viewType=HTML |
| Popis: |
The aqueous packed-bed extraction of bioactive compounds from yerba mate leaves was evaluated given their potential application in the food industry. The influence of temperature (50–70 °C) and feed flow rate (10–20 cm3/min) was investigated by central composite design. A mathematical model derived from the differential equation of mass conservation in solid and liquid phases was used to describe the concentration of total phenolic concentration over time, considering a finite volume-based algorithm to solve this multiscale model along the column length and particle radius. The findings demonstrated that higher temperatures improved bioactive chemical extraction yields, although feed flow rate played a role at low temperatures because it improved external mass transfer. Caffeic acid, caffeine, and chlorogenic acid were the principal bioactive chemicals studied, with the highest concentrations extracted being 156.3 × 10−2, 273.5 × 10−2, and 351.6 × 10−2 mg/gYM (mg of bioactive per g of yerba mate), respectively, obtained after 60 minutes of extraction process at 70 °C and a flow rate of 10 cm3/min. The amount of these predominant bioactive compounds extracted exceeded 90% of the total content that could be obtained using water as a solvent. The mathematical model evaluated showed relative mean errors lower than 3% and R2 higher than 98%, suggesting a good fit for the experimental data, with the external mass transfer and effective intraparticle diffusion coefficients ranging between 8.75 × 10−8 to 1.77 × 10−6 m/s and 9.34 × 10−11 to 3.06 × 10−9 m2/s, respectively. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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