Ultrasound extraction of phenolics and anthocyanins from jabuticaba peel

Rodrigues, Sueli; Brito, Edy Sousa de; Sousa, Adriana Dutra; Narain, Narendra

doi:10.1016/j.indcrop.2015.02.059

Cited by 164 publications

(105 citation statements)

References 25 publications

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“…[23] Three independent variables selected for optimization were ethanol concentration in water (% v/v), extraction temperature and pH. Those parameters, according to the results of preliminary experiments, as well as published literature, [10,24] can significantly affect extraction of phenolic compounds from medicinal plants, as well as their activity, including antiradical activity. Since this work was directed at preparation of extracts suitable for preparation of food supplements, only the effects of relatively small pH changes were investigated.…”

Section: Process Parametersmentioning

confidence: 99%

“…Those characteristics render it appropriate for extraction of wide array of bioactive natural compounds, including chemically sensitive ones, such as polyphenols. [10] UAE extraction conditions can greatly affect the yield and the composition of the prepared extracts, especially if target compounds are sensitive to oxidation and other types of degradation. Among numerous factors that can influence the efficiency of UAE, solvent type selection has been recognized as the most important.…”

Section: Introductionmentioning

confidence: 99%

“…Water is closely followed by ethanol, which is affordable and natural solvent obtainable from renewable sources. [10] Another important extraction variable is the temperature. High temperature may improve the extraction process by reducing the viscosity of the solvent and increasing kinetic energy of the molecules in the solutions.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is widely used in optimizing the extraction of polyphenols, [13,14] alkaloids, [15] and other biologically active compounds from herbal material. Examples also include use of RSM for optimization of UAE of phenolic antioxidants such as anthocyanines, [10] phenolic acids, and flavonoids. [14] As mentioned previously, M. sativa and its extracts contain several classes of polyphenolic phytochemicals which, through antioxidant and other biological activities, can exert beneficial effects on human organism.…”

Section: Introductionmentioning

confidence: 99%

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Multi-response Optimization of Ultrasound-assisted Extraction of Bioactive Components from Medicago Sativa L.

2017

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Response surface methodology was used to optimize experimental conditions for ultrasound-assisted extraction of functional components from Medicago sativa L. (Fabaceae) aerial parts. The procedure was performed according to the Box-Behnken design. The independent variables were ethanol concentration (X1), temperature (X2), and pH (X3), while the responses were extraction yield, DPPH radical scavenging activity of the extracts (RSA IC50), content of total phenols (TP), total flavonoids (TF) and total phenolic acids (TPA). The response values of the extracts prepared at optimum conditions (X1, X2, X3) were: yield (162 mg/ml, 20 %, 60 °C, 5.5), TP (6.63 mg/ml, 100 %, 60 °C, 5.5), TF (0.292 mg/ml, 100 %, 23 °C, 5.5), TPA (0.275 mg/ml, 100 %, 23 °C, 8.5) and RSA IC50 (3.97 mg/ml, 40 %, 60 °C, 7.0). The predicted values matched well with the observed ones indicating the suitability of the selected models for extraction of bioactive compounds from M. sativa.

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Section: Process Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi-response Optimization of Ultrasound-assisted Extraction of Bioactive Components from Medicago Sativa L.

2017

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“…In the PLE process, the pressure and temperature can be adjusted to improve the selectivity of the extraction solvent over a particular group of compounds (Carabias-Martínez et al, 2005;Liu et al, 2014). In the PLE process, solvents are generally recognized as safe (GRAS), such as water, ethanol or their mixtures, and are commonly used for phenolic and anthocyanin extraction (Mane et al, 2015;Rodrigues et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Obtaining anthocyanin-rich extracts from frozen açai (Euterpe oleracea Mart.) pulp using pressurized liquid extraction

et al. 2017

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Açai is considered a functional food, and in addition to being a source of energy and fiber, it is a valuable source of bioactive compounds such as anthocyanins, minerals and fatty acids. In the present work, antioxidant-rich extracts from açai pulp were obtained using pressurized liquid extraction (PLE). The effects of the independent variables, including solvent type (pure ethanol and ethanol/water (50:50 v/v)), citric acid (0 and 0.3%, w/w), pressure (20 and 80 bar) and temperature (30 and 60 °C) were evaluated using a full factorial design. The extraction was affected primarily by the solvent type and the citric acid percentage. The results indicate that the maximum overall yield (X 0 ) was 64 ± 9 (%, d.b.) when the process was performed using ethanol (99.5%) and citric acid (0.3% w/w). The maximum total anthocyanin content and anthocyanin recovered from the raw material were 7 ± 1 (mg anthocyanin/g extract, d.b.) and 11 ± 2 (%, d.b.), respectively.

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