Tunisian tomato by-products, as a potential source of natural bioactive compounds

Gharbi, S; Renda, Giuseppe; Barbera, Laura La; Amri, Mohamed; Messina, Concetta María; Santulli, Andrea

doi:10.1080/14786419.2016.1209671

Cited by 45 publications

(31 citation statements)

References 16 publications

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“…For the extractions ethanol 80% and water (1:10 w/v) were used (10,18). The materials were then homogenized according to a consolidated protocol (19)(20)(21)(22). The matrices extracted were centrifuged and then filtered (Whatman R qualitative filter paper, Grade 93-10 µm, Merck KGaA Darmstadt, Germany) and freeze-dried (10,18).…”

Section: Extraction With Solventsmentioning

confidence: 99%

The Inclusion of a Supercritical Fluid Extract, Obtained From Honey Bee Pollen, in the Diet of Gilthead Sea Bream (Sparus aurata), Improves Fish Immune Response by Enhancing Anti-oxidant, and Anti-bacterial Activities

et al. 2020

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In the present study, the immune-stimulatory effect of two levels of honey bee pollen (5 and 10%, P5 and P10 treatment, respectively) and its supercritical fluid extract (0. 5 and 1%, E0.5 and E1, respectively) included in the diet, was tested in gilthead seabream (Sparus aurata). The in vivo trial was preceded by the evaluation of antioxidant properties of three different bee pollen extracts obtained by water, ethanol 80%, and Supercritic Fluids Extraction (SFE). The preliminary evaluation attested that the SFE showed the lowest extraction yield (10.47%) compared to ethanol 80% (48.61%) and water (45.99%). SFE extract showed good antioxidant properties with high polyphenol content (13.06 mg GAE/g), radical scavenging activity (3.12 mg/ml), reducing power (38.68 mg/mL EC50). On the contrary, the water extract showed the significantly lowest polyphenol content (2 mg GAE/g; P < 0.05). The results of in vivo trial demonstrate that the diets supplemented with SFE bee pollen extract had a stimulatory effect on fish serum immunity, respect to the inclusion of raw pollen, this latter revealing some inhibitory effects in the immune response, such a decrease of serum peroxidase and lysozyme activities, particularly in P10 group significantly different (P < 0.05) from the control group. On the contrary, serum peroxidase, protease, antiprotease, were significantly increased in fish fed the diets supplemented with supercritical fluid extract, respect to the fish fed on control and on diets supplemented with 5 and 10% of raw pollen. For what concerns the bactericidal activity against Vibrio harveyii, all the treatments containing bee pollen regardless of the type showed their serum bactericidal activity significantly increased with respect to the control groups (p < 0.05). Given its high antioxidant properties, the absence of toxic solvents and the positive action carried out on improving the humoral response in gilthead seam bream, honey bee pollen SFE extract can be taken into account in the formulation of fish feeds.

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Section: Extraction With Solventsmentioning

confidence: 99%

The Inclusion of a Supercritical Fluid Extract, Obtained From Honey Bee Pollen, in the Diet of Gilthead Sea Bream (Sparus aurata), Improves Fish Immune Response by Enhancing Anti-oxidant, and Anti-bacterial Activities

et al. 2020

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“…For each plant, one gram of dried leaves were transferred into a flask containing 10 mL of the solvents (hexane, ethanol 80%, acetone 70%, and water) used for the extraction [9].The materials were then homogenized during five minutes at 4 • C, using an Ultra-Turrax (IKA, Werke Staufen, Germany) at 24,000 rpm according to a consolidated protocol [36][37][38]. In order to calculate the extraction yield (w/w), an aliquot of each extract (hexane, ethanol 80%, and acetone 70%) was evaporated in a rotary vacuum evaporator and weighed as described by Manuguerra et al [39].…”

Section: Extraction With Solventsmentioning

confidence: 99%

Species-Specific Antioxidant Power and Bioactive Properties of the Extracts Obtained from Wild Mediterranean Calendula Spp. (Asteraceae)

et al. 2019

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In this study we focused on four taxa of the genus Calendula (C. maritima, C. suffruticosa subsp. fulgida, C. arvensis, and the hybrid between the first two ones), collected in Mediterranean area (Sicily). Six extracts for each species were obtained using solvents with increasing polarity (hexane, ethanol 80%, acetone 70%, and water) and through extraction by supercritical fluids (SFE). It has been observed that the solvent with the highest extraction efficiency was ethanol 80% for all species. However, SFE extracts showed high antioxidant activity comparable to the ethanol 80% extract (polyphenol, DPPH, and reducing power method). These findings were confirmed by in vitro analysis (MTT assay) where it was observed that the tested concentration (24 µg/mL), obtained from ethanol 80% and SFE extracts, showed a protective effect comparable to that induced by a synthetic antioxidant. Extraction with SFE ensured a great selectivity by avoiding the use of toxic organic solvents and thus consisted of a promising technique for sustainable production of Calendula extracts.

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“…In summary, tomato peel waste obtained from the canning industry possessed remarkable amounts of TP and TF, compared to values reported by other authors. 8,[12][13][14]23,35 In reference to other extraction parameters, temperature had the greatest effect on extraction yields of phenols and flavonoids. However, their recovery was also associated with the appropriate choice of solvent and its combination with temperature of extraction.…”

Section: Influence Of Experimental Conditions On Total Phenols Andmentioning

confidence: 99%

Effect of Microwave-Assisted Extraction on Polyphenols Recovery from Tomato Peel Waste

Bakić

Pedišić

Zorić

et al. 2019

ACSi

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This study describes the application of microwave-assisted extraction (MAE) as an innovative technique for isolation of polyphenols from tomato peel waste. Effects of solvents, temperatures (25, 55 and 90 °C) and times (5 and 10 min) were evaluated with regard to total phenols (TP), total flavonoids (TF) and phenolic compound contents. Tomato peel extracts contain high amounts of kaemferol-3-O-rutinoside (8.5 to 142.5 mg kg -1 ), p-coumaric acid (3 to 111.5 mg kg -1 ) and chlorogenic acid derivative (10.5 to 109 mg kg -1 ). Results revealed that extraction time has no significant (p > 0.05) influence on TP, TF and phenolic compounds recovery (exception is cis-p-coumaric acid hexoside). On the other hand, the influence of temperature and chosen solvent on polyphenols yield is significant. Considering interest of consumers to intake natural compounds exhibiting antioxidant properties, this work suggests that tomato peel waste can be used as one of sustainable resources for polyphenols production by MAE.

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Tunisian tomato by-products, as a potential source of natural bioactive compounds

Cited by 45 publications

References 16 publications

The Inclusion of a Supercritical Fluid Extract, Obtained From Honey Bee Pollen, in the Diet of Gilthead Sea Bream (Sparus aurata), Improves Fish Immune Response by Enhancing Anti-oxidant, and Anti-bacterial Activities

The Inclusion of a Supercritical Fluid Extract, Obtained From Honey Bee Pollen, in the Diet of Gilthead Sea Bream (Sparus aurata), Improves Fish Immune Response by Enhancing Anti-oxidant, and Anti-bacterial Activities

Species-Specific Antioxidant Power and Bioactive Properties of the Extracts Obtained from Wild Mediterranean Calendula Spp. (Asteraceae)

Effect of Microwave-Assisted Extraction on Polyphenols Recovery from Tomato Peel Waste

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