Deployment of response surface methodology to optimise recovery of grape (Vitis vinifera) stem polyphenols

Karvela, Evangelia; Makris, Dimitris P.; Kalogeropoulos, Nick; Karathanos, Vaios Τ.

doi:10.1016/j.talanta.2009.05.042

Cited by 69 publications

(52 citation statements)

References 25 publications

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“…The differences observed concerning individual phenolics contained in the grape stems-based liqueurs in comparison with analytical extracts of grape stems, contribute to dissimilarities on the antioxidant capacity, further supporting the relevance of the individual phenolic composition, in addition to the quantitative phenolic content, to gain a healthy (poly)phenolic fraction (Karvela, Makris, Karogeropoulos, & Karathanos, 2009).…”

Section: (Poly)phenolic Profile Of Liqueursmentioning

confidence: 67%

New grape stems-based liqueur: Physicochemical and phytochemical evaluation

et al. 2016

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Section: (Poly)phenolic Profile Of Liqueursmentioning

confidence: 67%

New grape stems-based liqueur: Physicochemical and phytochemical evaluation

et al. 2016

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“…A previously published protocol was used [35], with modifications. An aliquot of 0.25 mL sample was mixed with 0.75 mL AlCl 3 reagent (0.16% (w/v) AlCl 3 in 5% (v/v) acetic acid in methanol) and allowed to stand for 30 min, at room temperature.…”

Section: Determination Of Total Flavonoid Yield (Y Tfn )mentioning

confidence: 99%

Kinetics of Ultrasound-Assisted Flavonoid Extraction from Agri-Food Solid Wastes Using Water/Glycerol Mixtures

Makris

2016

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Red grape pomace (RGP) and onion solid wastes (OSW) were used as raw material to produce flavonoid-enriched extracts, using ultrasound-assisted solid-liquid extraction. The extraction medium used was composed of water and glycerol and under the conditions used the extraction of flavonoids from both materials was shown to obey first-order kinetics. Maximum diffusivities (D e ) values were 4.01ˆ10´1 1 and 2.35ˆ10´1 1 m 2¨s´1 , for RGP and OSW extraction, respectively, while the corresponding activation energies (E a ) were 14.00 and 15.23 kJ¨mol´1.

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“…The extraction yield (Y TP ), the antiradical activity (A AR ) and the reducing power (P R ) were chosen as the dependent variables or responses because of their well-known respective dependency on the extraction process [21,22]. The data obtained were subjected to regression analysis using least square methodology to extract the equations that described the response values as a function of the independent variables (mathematical models).…”

Section: Experimental Designmentioning

confidence: 99%

Optimization of a Green Extraction/Inclusion Complex Formation Process to Recover Antioxidant Polyphenols from Oak Acorn Husks (Quercus Robur) Using Aqueous 2-Hydroxypropyl-β-Cyclodextrin/Glycerol Mixtures

et al. 2016

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Aqueous mixtures of glycerol and 2-hydroxypropyl-β-cyclodextrin (CD), two non-toxic eco-friendly substances, were used as a means of extracting antioxidant polyphenols from oak acorn (Quercur robur) husks. The process was optimized by implementing a central composite (Box-Behnken) experimental design and response surface methodology, taking into consideration the critical parameters (independent variables) of glycerol concentration (C gl ), CD concentration (C CD ) and temperature (T). The assessment of the extraction model was based on three responses: the total polyphenol yield (Y TP ), the antiradical activity (A AR ) and the reducing power (P R ). The model illustrated that Y TP depended significantly on C gl and C CD , but not on T, whereas both antioxidant properties considered (A AR and P R ) were temperature-dependent. The maximum predicted Y TP was 122.19 mg GAE per g dry husk weight, while the extract obtained under optimized conditions displayed strong antioxidant activity.

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Deployment of response surface methodology to optimise recovery of grape (Vitis vinifera) stem polyphenols

Cited by 69 publications

References 25 publications

New grape stems-based liqueur: Physicochemical and phytochemical evaluation

New grape stems-based liqueur: Physicochemical and phytochemical evaluation

Kinetics of Ultrasound-Assisted Flavonoid Extraction from Agri-Food Solid Wastes Using Water/Glycerol Mixtures

Optimization of a Green Extraction/Inclusion Complex Formation Process to Recover Antioxidant Polyphenols from Oak Acorn Husks (Quercus Robur) Using Aqueous 2-Hydroxypropyl-β-Cyclodextrin/Glycerol Mixtures

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