Chemical Composition and Antioxidant Activity of Euterpe oleracea Roots and Leaflets

Brunschwig, Christel; Leba, Louis Jérôme; Saout, Mona; Martial, Karine; Béreau, Didier; Robinson, Jean Charles

doi:10.3390/ijms18010061

Cited by 14 publications

(14 citation statements)

References 35 publications

(62 reference statements)

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“…TEAC and TPC are an electron transfer (ET) based assays, whereas DPPH is mainly ET based and has a hydrogen-atom abstraction mechanism (HAT) [ 35 ]. Due to their different mode of actions (ET or HAT), these methods have been successfully employed to study antioxidant activities of plant extracts in the complex media [ 35 , 36 , 37 ]. During this study, modified microplate assays were employed in order to minimize the use of sample, chemicals, and waste disposal.…”

Section: Methodsmentioning

confidence: 99%

Antioxidant Activity of the Lignins Derived from Fluidized-Bed Fast Pyrolysis

Qazi

Briens

et al. 2017

Molecules

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A challenge in recent years has been the rational use of forest and agriculture residues for the production of bio-fuel, biochemical, and other bioproducts. In this study, potentially useful compounds from pyrolytic lignins were identified by HPLC-MS/MS and untargeted metabolomics. The metabolites identified were 2-(4-allyl-2-methoxyphenoxy)-1-(4-hydroxy-3-methoxyphenyl)-1-propanol, benzyl benzoate, fisetinidol, phenyllactic acid, 2-phenylpropionic acid, 6,3′-dimethoxyflavone, and vanillin. The 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity (DPPH), trolox equivalent antioxidant capacity (TEAC), and total phenolics content (TPC) per gram of pyrolytic lignin ranged from 14 to 503 mg ascorbic acid equivalents, 35 to 277 mg trolox equivalents, and 0.42 to 50 mg gallic acid equivalents, respectively. A very significant correlation was observed between the DPPH and TPC (r = 0.8663, p ≤ 0.0001), TEAC and TPC (r = 0.8044, p ≤ 0.0001), and DPPH and TEAC (r = 0.8851, p ≤ 0.0001). The polyphenolic compounds in the pyrolytic lignins which are responsible for radical scavenging activity and antioxidant properties can be readily profiled with HPLC-MS/MS combined with untargeted metabolomics. The results also suggest that DPPH, TEAC, and TPC assays are suitable methods for the measurement of antioxidant activity in a variety of pyrolytic lignins. These data show that the pyrolytic lignins can be considered as promising sources of natural antioxidants and value-added chemicals.

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Section: Methodsmentioning

confidence: 99%

Antioxidant Activity of the Lignins Derived from Fluidized-Bed Fast Pyrolysis

Qazi

Briens

et al. 2017

Molecules

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“…However, it is not difficult to find foods made from açai in the form of juices, pulps, concentrated extracts, freeze-dried açai, tablets, etc. [29][30][31][32] in different world regions.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Anthocyanins and Total Phenolic Compounds from Açai (Euterpe oleracea Mart.) Using an Experimental Design Methodology. Part 2: Ultrasound-Assisted Extraction

et al. 2020

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Two optimized methods for ultrasound-assisted extraction were evaluated for the extraction of two types of acai bioactive compounds: Total anthocyanins (TAs) and total phenolic compounds (TPCs). For the extraction optimization, a Box Behnken factorial design of different variables in the following intervals was used: Methanol-water (25%–75%) for solvent composition, temperatures between 10 and 70 °C, amplitude in the range between 30% and 70% of the maximum amplitude −200 W), extraction solvent pH (2–7), the ratio for sample-solvent (0.5 g:10 mL–0.5 g:20 mL), and cycle between 0.2 and 0.7 s. The extraction kinetics were studied using different periods between 5 and 30 min. TA and TPC were analyzed by UHPLC and the Folin–Ciocalteu method, respectively. Optimized conditions for TA were: 51% MeOH in water, 31 °C temperature, pH 6.38, cycle 0.7 s, 65% amplitude, and 0.5 g:10 mL of sample-solvent ratio. Optimized conditions for the TPC were: 49% MeOH in water, 41 °C temperature, pH 6.98, cycle 0.2 s, 30% amplitude, and 0.5 g:10 mL of sample-solvent ratio. Both methods presented a relative standard deviation below 5% in the precision study. The suitability of the methods was tested in real samples. It was confirmed that these methods are feasible for the extraction of the studied bioactive compounds from different açai matrices.

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“…Some researchers have discovered that it is one of the richest fruits in terms of natural antioxidants (anthocyanins, phenolic compounds, vitamins, etc. ), among all of the fruits and vegetables known to date [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Anthocyanins and Total Phenolic Compounds from Açai (Euterpe oleracea Mart.) Using an Experimental Design Methodology. Part 1: Pressurized Liquid Extraction

et al. 2020

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Currently, açai is one of the most important fruits present in the world. Several studies have demonstrated its high content in phenolic compounds and anthocyanins. Both of them are responsible of interesting properties of the fruit such as anti-inflammatory, antioxidant or anticancer. In the present study, two optimized pressurized liquid extraction (PLE) methods have been developed for the extraction of anthocyanins and total phenolic compounds from açai. A full factorial design (Box–Behnken design) with six variables (solvent composition (25–75% methanol-in-water), temperature (50–100 °C), pressure (100–200 atm), purge time (30–90 s), pH (2–7) and flushing (50–150%)) were employed. The percentage of methanol in the extraction solvent was proven to be the most significant variable for the extraction of anthocyanins. In the case of total phenolic compounds, the extraction temperature was the most influential variable. The developed methods showed high precision, with relative standard deviations (RSD) of less than 5%. The applicability of the methods was successfully evaluated in real samples. In conclusion, two rapid and reliable PLE extraction methods to be used for laboratories and industries to determine anthocyanins and total phenolic compounds in açai and its derived products were developed in this work.

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Chemical Composition and Antioxidant Activity of Euterpe oleracea Roots and Leaflets

Cited by 14 publications

References 35 publications

Antioxidant Activity of the Lignins Derived from Fluidized-Bed Fast Pyrolysis

Antioxidant Activity of the Lignins Derived from Fluidized-Bed Fast Pyrolysis

Extraction of Anthocyanins and Total Phenolic Compounds from Açai (Euterpe oleracea Mart.) Using an Experimental Design Methodology. Part 2: Ultrasound-Assisted Extraction

Extraction of Anthocyanins and Total Phenolic Compounds from Açai (Euterpe oleracea Mart.) Using an Experimental Design Methodology. Part 1: Pressurized Liquid Extraction

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