Optimization of microwave-assisted extraction of polyphenols from Myrtus communis L. leaves

Dahmoune, Farid; Nayak, Balunkeswar; Moussi, Kamal; Remini, Hocine; Madani, Khodir

doi:10.1016/j.foodchem.2014.06.066

Cited by 422 publications

(287 citation statements)

References 36 publications

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“…It is well known that several variables can affect the extraction of compounds from natural sources (Bhuyan et al, 2015;Dahmoune et al, 2015;Routray and Orsat, 2012). However, different authors (Albuquerque et al, 2016;Heleno et al, 2016;Pinela et al, 2016b) are in agreement concerning the variables affecting the extraction responses in MAE and UAE systems, the main being identified as: X 1 (t, min), X 2 (T,°C or P, W, respectively for MAE and UAE), X 3 (Et, %) and X 4 (S/L, g/L).…”

Section: Resultsmentioning

confidence: 99%

Modern extraction techniques optimized to extract betacyanins from Gomphrena globosa L.

Roriz

Barros

Prieto

et al. 2017

Industrial Crops and Products

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A B S T R A C TGomphrena globosa L. is a source of betacyanins, molecules with high colorant power. In order to replace conventional extraction techniques, microwave (MAE) and ultrasound assisted extraction (UAE) processes were optimized by the response surface methodology (RSM) to maximize the recovery of betacyanins from G. globosa. A five-level full factorial design of 24 combinations and 4 replicates was implemented for MAE and UAE. The optimum processing conditions for MAE (t = 8 min; T = 60°C; Et = 0%; and S/L = 5 g/L) conducted to an extraction yield of 39.6 ± 1.8 mg/g dry weight, while for UAE (t = 22 min; P = 500%; Et = 0%; and S/ L = 5 g/L) a value of 46.9 ± 4.8 mg/g was achieved, validating the UAE more suitable to obtain the target compounds. This technique can provide extracts rich in betacyanins and with high potential to be used as natural colorants.

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Section: Resultsmentioning

confidence: 99%

Modern extraction techniques optimized to extract betacyanins from Gomphrena globosa L.

Roriz

Barros

Prieto

et al. 2017

Industrial Crops and Products

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“…The ratio of liquid to solid is an important parameter that can influence the extraction efficiency [24,25]. Numerous studies have demonstrated that a suitable ratio of liquid to solid could contribute to the extraction of flavonoids [26,27].…”

Section: Effects Of Different Ratio Of Liquid To Solidmentioning

confidence: 99%

Optimization of Ultrasonic-Assisted Extraction of Flavonoid Compounds and Antioxidants from Alfalfa Using Response Surface Method

2015

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Ultrasonic-assisted extraction (UAE) was used to extract flavonoid-enriched antioxidants from alfalfa aerial part. Response surface methodology (RSM), based on a four-factor, five-level central composite design (CCD), was employed to obtain the optimal extraction parameters, in which the flavonoid content was maximum and the antioxidant activity of the extracts was strongest. Radical scavenging capacity of the extracts, which represents the amounts of antioxidants in alfalfa, was determined by using 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulphonicacid) (ABTS) and 2,2′-diphenyl-1-picrylhydrazyl (DPPH) methods. The results showed good fit with the proposed models for the total flavonoid extraction (R 2 = 0.9849), for the antioxidant extraction assayed by ABTS method (R 2 = 0.9764), and by DPPH method (R 2 = 0.9806). Optimized extraction conditions for total flavonoids was a ratio of liquid to solid of 57.16 mL/g, 62.33 °C, 57.08 min, and 52.14% ethanol. The optimal extraction parameters of extracts for the highest antioxidant activity by DPPH method was a ratio of liquid to solid 60.3 mL/g, 54.56 °C, 45.59 min, and 46.67% ethanol, and by ABTS assay was a ratio of liquid to solid 47.29 mL/g, 63.73 °C, 51.62 min, and 60% ethanol concentration. Our work offers optimal extraction conditions for total flavonoids and antioxidants from alfalfa.

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“…In this way, microwave-assisted extraction (MAE), an emerging green technology, have demonstrated to be a promising method for the recovery of bioactive compounds such as total phenolics, flavonoids, anthocyanins, and tannins from plants. (Dahmoune et al, 2014;Dahmoune, Nayak, Moussi, Remini, & Madani, 2015;Dairi et al, 2015;Kim et al, 2012;Li et al, 2012Li et al, , 2014Zeković, Vladić, Vidović, Adamović, & Pavlić, 2016). Although, to the best of our knowledge the MAE has not been used for extraction of natural antioxidant compounds from E. edulis.…”

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confidence: 99%

Natural Antioxidant Activity and Compounds Content from Wastes of Euterpe edulis Berries

Frasão¹,

Costa²,

Rodrigues³

et al. 2017

JAS

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The Euterpe edulis (Juçara) is native to Brazil, which berries and wastes present high antioxidant content. Therefore, in this study, microwave-assisted extraction (MAE) was investigated for antioxidant compounds extraction from E. edulis waste and maximized antioxidant activities using response surface methodology coupled with a central composite design. Three factors were observed: microwave power (400/500/600 W), exposition time (30/60/90 sec) and ethanol concentration solvent (40/60/80%). The extracts were characterized by determination of total phenolic (TPC), flavonoids (TFC), monomeric anthocyanins (TAC), tannins content (TTC), and in vitro antioxidant assay (AA%). The yield of TPC, TFC, TAC, and TTC varied at 595.43-2171.34 mg GAE·100 g DM , respectively. The optimal MAE parameters for TPC was microwave power 668.18 W, exposition time 110.45 s and aqueous ethanol concentration 93.64%, for TFC same parameters observed; though for TAC the different parameters were 532.28 W, and for TTC 9.55 s. However, for antioxidant activity, the parameters were 668.18 W, 110.45 s time and 64.41% of aqueous ethanol solvent. Therefore, this methodology was successfully applied for optimal extraction of total phenolics, flavonoids, monomeric anthocyanins and tannins from juçara waste and obtain optimal antioxidant activity.

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Optimization of microwave-assisted extraction of polyphenols from Myrtus communis L. leaves

Cited by 422 publications

References 36 publications

Modern extraction techniques optimized to extract betacyanins from Gomphrena globosa L.

Modern extraction techniques optimized to extract betacyanins from Gomphrena globosa L.

Optimization of Ultrasonic-Assisted Extraction of Flavonoid Compounds and Antioxidants from Alfalfa Using Response Surface Method

Natural Antioxidant Activity and Compounds Content from Wastes of Euterpe edulis Berries

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