Green-based methods to obtain bioactive extracts from Plantago major and Plantago lanceolata

Mazzutti, Simone; Riehl, Carlos A. S.; Ibáñez, Elena; Ferreira, Sandra R.S.

doi:10.1016/j.supflu.2016.09.018

Cited by 36 publications

(15 citation statements)

References 55 publications

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“…[42] When nonpolar solvents, such as n-hexane, are used, lipid extracts with low TPC values are obtained. [43] Ethyl acetate, with an intermediate polarity, presented TPC values that were between those obtained with ethanol and n-hexane.…”

Section: Total Phenolic Content (Tpc)mentioning

confidence: 82%

“…The relatively low antioxidant capacity obtained with n-hexane and ethyl acetate may be related to the low amount of phenolic compounds in these extracts. [16,43] According to Boeing et al [41] and Ho et al, [42] polyphenols are usually mainly responsible for the antioxidant properties of plants. These compounds act as antioxidants by the donation of a hydrogen atom, by metals chelating and by singlet oxygen quenching [45] .…”

Section: Ferric Reducing Antioxidant Power (Frap)mentioning

confidence: 99%

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Optimization of ultrasound‐assisted extraction of bioactive compounds from B. forficata subsp. Pruinosa

et al. 2020

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Extracts containing bioactive compounds were obtained from Bauhinia forficata leaves by ultrasound‐assisted extraction (UAE) with three different solvents (n‐hexane, ethyl acetate, and ethanol) and were compared with those obtained by a conventional method (maceration). Box‐Behnken experimental design was applied to examine and optimize the effect of the extraction temperature (40°C‐60°C), power (20%‐80%), and sample to solvent ratio (1:10 to 1:20 (w/v)) on the total phenolic content (TPC), total flavonoid content (TFC), and the ferric reducing antioxidant power (FRAP) of B. forficata leaf extracts. This experimental design generated second‐order polynomial models, which accurately describe the experimental data, allowing the prediction of optimal conditions for the investigated responses. Optimal extraction was achieved under the following conditions: 80% power, temperature of 41°C, and a 1:20 sample to solvent ratio. Under these conditions, the experimental yield was 8.33 ± 0.32%, total phenolic content was 59.47 ± 0.71 mg GAE · gextract−1, total flavonoid content was 62.30 ± 3.38 mg QE · gextract−1, and the ferric reducing antioxidant power was 726.7 ± 15.7 μmol Fe(II)EQ · gextract−1, which were close to the predicted values, which validated the models. The major compounds found in B. forficata extracts were tocopherols, phytol, heneicosane, and β‐Sitosterol.

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Section: Total Phenolic Content (Tpc)mentioning

confidence: 82%

Section: Ferric Reducing Antioxidant Power (Frap)mentioning

confidence: 99%

Optimization of ultrasound‐assisted extraction of bioactive compounds from B. forficata subsp. Pruinosa

et al. 2020

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“…The first is related to the constant extraction rate (CER) phase, when the solute is easily accessible on the surface of matrix particles; the second represents the falling extraction rate (FER) phase, when the mass transfer rate decreases rapidly as a result of the decrease in the effective mass transfer area; and last, the diffusional period (DP), characterized by the absence of an easily accessible solute in the third phase [ 43 ]. Thus, and as evidenced in different studies, obtaining the diffusional period is of great importance to ensure that the global yield tests present results close to the real exhaustion of the extraction bed [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

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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“…Ambas as variáveis revelaram efeitos positivos, por exemplo, aumentando a razão mássica e a temperatura, o rendimento de extração aumenta consequentemente. Isso corrobora com achados anteriores da literatura de Cruz et al [15], Mazzutti et al [16], Fetzer et al [17] e Rodriguez et al [18] para diferentes matérias primas.…”

Section: Rendimentos De Extração (X 0 )unclassified

RENDIMENTO E MODELAGEM MATEMÁTICA DA EXTRAÇÃO USANDO CO2 SUPERCRÍTICO + ETANOL DE FOLHAS DE YACON (Smallanthus sonchifolius)

Cruz¹,

Fetzer²,

Amaral³

et al. 2020

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Este estudo apresenta as extrações de folhas de yacon usando fluido supercrítico CO 2 + etanol (scCO 2 +EtOH). Ensaios foram realizados sob as seguintes condições: 30-70 ºC, 15-25 MPa e variando a razão mássica de etanol (co-solvente) para sólido (matéria prima) RM. Todas as extrações foram avaliadas em termos de rendimento total de extração (X 0) e as cinéticas de extração foram apresentadas. Os extratos foram obtidos satisfatoriamente usando a tecnologia supercrítica. O rendimento variou de 2,32 % usando scCO 2 +EtOH a 30ºC/ 25 MPa/ RM 1:1 até 5,22 % a 70 ºC/ 25 MPa/ RM 3:1.

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Green-based methods to obtain bioactive extracts from Plantago major and Plantago lanceolata

Cited by 36 publications

References 55 publications

Optimization of ultrasound‐assisted extraction of bioactive compounds from B. forficata subsp. Pruinosa

Optimization of ultrasound‐assisted extraction of bioactive compounds from B. forficata subsp. Pruinosa

Supercritical Extraction of Red Propolis: Operational Conditions and Chemical Characterization

RENDIMENTO E MODELAGEM MATEMÁTICA DA EXTRAÇÃO USANDO CO2 SUPERCRÍTICO + ETANOL DE FOLHAS DE YACON (Smallanthus sonchifolius)

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