Extraction of Synadenium grantii Hook f. using conventional solvents and supercritical CO2 + ethanol

Guedes, Amanda Roman; Souza, Ariádine Reder Custódio de; Barbi, Rafaela Cristina Turola; Escobar, Estephanie Laura Nottar; Zanoello, Éverton Fernando; Corazza, Marcos L.

doi:10.1016/j.supflu.2020.104796

Cited by 28 publications

(18 citation statements)

References 31 publications

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“…This may be related to the increased polarity of the solvent together with the ability of ethanol to improve the extraction surface area in a natural solid matrix [ 59 ]. The expansion of the material, generated by the interactions between solids and solvents, and the affinity between the liquid solvent and the associative compounds in the raw material leads to greater miscibility of the gas in the sample, resulting in greater extraction efficiency, as reported in previous studies [ 59 , 60 ].…”

Section: Resultsmentioning

confidence: 80%

“…Cruz et al [ 63 ] showed that the presence of hydrated ethanol (1/1, v / v ) significantly increased the extraction yield of yacon leaves, obtaining extracts with higher antioxidant activity compared to extraction without the use of cosolvent, leading to higher yields. In a recent study, Guedes et al [ 60 ] showed that as the concentration of ethanol added to the process was increased (0.5/1, 1.1/1 and 1.5/1, w / w ), the yield and efficiency of SFE extraction in samples of Synadenium grantii increased.…”

Section: Resultsmentioning

confidence: 99%

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Supercritical Extraction of Red Propolis: Operational Conditions and Chemical Characterization

et al. 2020

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The objective of this study was to determine the best operational conditions for obtaining red propolis extract with high antioxidant potential through supercritical fluid extraction (SFE) technology, using carbon dioxide (CO2) as the supercritical fluid and ethanol as the cosolvent. The following parameters were studied: overall extraction curve, S/F (mass of CO2/mass of sample), cosolvent percentage (0, 1, 2 and 4%) and global yield isotherms as a function of different pressures (250, 350 and 450 bar) and temperatures (31.7, 40 and 50 °C). Within the investigated parameters, the best conditions found were an S/F of 131 and the use of ethanol at the highest concentration (4% w/w), which resulted in higher extract yields and higher content of antioxidant compounds. Formononetin, the main biomarker of red propolis, was the compound found at the highest amounts in the extracts. As expected, the temperature and pressure conditions also influenced the process yield, with 350 bar and 40 °C being the best conditions for obtaining bioactive compounds from a sample of red propolis. The novel results for red propolis found in this study show that it is possible to obtain extracts with high antioxidant potential using a clean technology under the defined conditions.

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Supercritical Extraction of Red Propolis: Operational Conditions and Chemical Characterization

et al. 2020

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“…Moreover, these solvents can be responsible for high quantities of waste, which in most cases are potentially harmful to the environment. Therefore, for industrial applications, the use of clean solvents such as water is highly beneficial on one hand because it is cheaper and more accessible and on the other hand because it is cleaner and more environmentally friendly [ 31 , 32 ].…”

Section: Resultsmentioning

confidence: 99%

Extraction of Phenolic Compounds with Antioxidant Activity from Strawberries: Modelling with Artificial Neural Networks (ANNs)

Golpour

Ferrão

Gonçalves

et al. 2021

Foods

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This research study focuses on the evaluation of the total phenolic compounds (TPC) and antioxidant activity (AOA) of strawberries according to different experimental extraction conditions by applying the Artificial Neural Networks (ANNs) technique. The experimental data were applied to train ANNs using feed- and cascade-forward backpropagation models with Levenberg-Marquardt (LM) and Bayesian Regulation (BR) algorithms. Three independent variables (solvent concentration, volume/mass ratio and extraction time) were used as ANN inputs, whereas the three variables of total phenolic compounds, DPPH and ABTS antioxidant activities were considered as ANN outputs. The results demonstrate that the best cascade- and feed-forward backpropagation topologies of ANNs for the prediction of total phenolic compounds and DPPH and ABTS antioxidant activity factors were the 3-9-1, 3-4-4-1 and 3-13-10-1 structures, with the training algorithms of trainlm, trainbr, trainlm and threshold functions of tansig-purelin, tansig-tansig-tansig and purelin-tansig-tansig, respectively. The best R2 values for the predication of total phenolic compounds and DPPH and ABTS antioxidant activity factors were 0.9806 (MSE = 0.0047), 0.9651 (MSE = 0.0035) and 0.9756 (MSE = 0.00286), respectively. According to the comparison of ANNs, the results showed that the cascade-forward backpropagation network showed better performance than the feed-forward backpropagation network for predicting the TPC, and the FFBP network, in predicting the DPPH and ABTS antioxidant activity factors, had more precision than the cascade-forward backpropagation network. The ANN technique is a potential method for estimating targeted total phenolic compounds and the antioxidant activity of strawberries.

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“…Ensaios preliminares dos rendimentos da extração supercrítica da casca. Synadenium grantii Hook f.,Guedes et al (2020) encontraram comportamento parecido com os ensaios preliminares desse trabalho, nenhuma das condições de pressão e temperatura influenciou significativamente o rendimento da extração ou a cinética de extração, excetuando a extração com menor densidade de CO2 (80 ºC e 150 bar) que resultou no menor rendimento global. Sugeriu-se que isso ocorre devido à baixa densidade do solvente nessas condições que compromete o poder de solvatação, enquanto o oposto pode ser visto em pressões maiores já que a pressão de vapor do soluto aumenta.…”

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“…Podendo ser vista na Tabela 5.10. A atividade antioxidante das sementes de carnaúba foi maior que a extrações obtidas por Veggi (2013) com outras plantas usando EFS.Tabela 5.10 -Atividade antioxidante (IC50) para extratos etanólicos obtidos por Soxhlet.Quando comparada com outros estudos, a atividade antioxidante das sementes do presente trabalho demonstrou maior potencial Guedes et al (2020). encontraram para o extrato obtido por extração supercrítica de melhor rendimento e com proporção de etanol de 1,5:1 resultado de IC50 de 475,33 µg/mL, valor maior que o encontrado por extração Soxhlet de 85,18 µg/mL, porém menor do que quando CO2 foi empregado sem solvente (761,39 µg/mL).…”

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Extração de compostos bioativos da carnaúba (Copernicia prunifera) através de CO2 supercrítico.

Buriti¹

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Extraction of Synadenium grantii Hook f. using conventional solvents and supercritical CO2 + ethanol

Cited by 28 publications

References 31 publications

Supercritical Extraction of Red Propolis: Operational Conditions and Chemical Characterization

Supercritical Extraction of Red Propolis: Operational Conditions and Chemical Characterization

Extraction of Phenolic Compounds with Antioxidant Activity from Strawberries: Modelling with Artificial Neural Networks (ANNs)

Extração de compostos bioativos da carnaúba (Copernicia prunifera) através de CO2 supercrítico.

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