Obtaining an Extract Rich in Phenolic Compounds from Olive Pomace by Pressurized Liquid Extraction

Pavez, I. Cea; Lozano-Sánchez, Jesús; Borrás-Linares, Isabel; Núñez, Hugo; Robert, Paz; Segura‐Carretero, Antonio

doi:10.3390/molecules24173108

Cited by 77 publications

(69 citation statements)

References 34 publications

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“…There is an improvement of compounds’ solubilities and the desorption kinetics from the matrices [130]. This process has been used to extract several bioactive natural compounds, such as essential oil from peppermint [107], polyphenols from goldenberry [109], carotenoids from carrot by-products [108] and phenolic compounds from a large variety of plant materials (e.g., Goji berry, feijoa peel, grape marc, spent coffee grinds and olive pomace) [25,110,111,112,113].…”

Section: Extraction Processes Of Natural Antioxidantsmentioning

confidence: 99%

Antioxidants of Natural Plant Origins: From Sources to Food Industry Applications

2019

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In recent years, great interest has been focused on using natural antioxidants in food products, due to studies indicating possible adverse effects that may be related to the consumption of synthetic antioxidants. A variety of plant materials are known to be natural sources of antioxidants, such as herbs, spices, seeds, fruits and vegetables. The interest in these natural components is not only due to their biological value, but also to their economic impact, as most of them may be extracted from food by-products and under-exploited plant species. This article provides an overview of current knowledge on natural antioxidants: their sources, extraction methods and stabilization processes. In addition, recent studies on their applications in the food industry are also addressed; namely, as preservatives in different food products and in active films for packaging purposes and edible coatings.

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Section: Extraction Processes Of Natural Antioxidantsmentioning

confidence: 99%

Antioxidants of Natural Plant Origins: From Sources to Food Industry Applications

2019

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“…Although there are some reports in the literature concerning the recovery of phenolic compounds from olive pomace (Cioffi et al, 2010;Nunes et al, 2018;Pavez et al, 2019;Peralbo-Molina et al, 2012;Sygouni et al, 2019), most of these studies did not quantify the phenolic compounds present in the samples. Table 3 present the quantification of some compounds observed in EOP irradiated at 5 kGy in comparison with a work developed by Suárez et al (2009) using solid-liquid extraction at atmosphere and high pressures.…”

Section: Phenolic Compounds Characterizationmentioning

confidence: 99%

“…The recovery of phenolic compounds from olive pomace have been studied through the application of several techniques, such as hydrothermal treatment (Fernández-Bolaños et al, 2002), membrane technology (Sygouni et al, 2019), centrifugation (Cioffi et al, 2010), Superheated Liquid Extraction (Peralbo-Molina et al, 2012), Pressurized Liquid Extraction (Pavez et al, 2019), Multi-frequency Multimode Modulated ultrasonic technique (Nunes et al, 2018) and solid-liquid extraction (Suárez et al, 2010(Suárez et al, , 2009Vitali Čepo et al, 2017;Zuorro, 2014). Hydroxytyrosol has been reported as the main phenolic compound in olive pomace, being an effective natural antioxidant with beneficial properties such as cancer prevention, skin protection, antiinflammatory activity (Fernández-Bolaños et al, 2008), and in the protection against cardiovascular diseases (Bulotta et al, 2014;Robles-Almazan et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

The use of gamma radiation for extractability improvement of bioactive compounds in olive oil wastes

Madureira

Días

Pinela

et al. 2020

Science of The Total Environment

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Olive pomace is an environmentally detrimental waste from olive oil industry, containing large amounts of bioactive compounds that might be used by the food industry. In this work, the effects of gamma radiation on phenolic compounds and bioactive properties (antioxidant, antimicrobial activities and hepatotoxicity) of Crude Olive Pomace (COP) and Extracted Olive Pomace (EOP) extracts were evaluated. Hydroxytyrosol was the main phenolic compound identified in both olive pomace extracts (24-25 mg/g). The gamma radiation treatment of olive pomace improved at least 2-fold the extractability of phenolic compounds. Moreover, results suggested that gamma radiation at 5 kGy increased the antioxidant activity in EOP, while keeping the ability to protect erythrocytes against oxidation-induced haemolysis. Gamma radiation at 5 kGy could be a suitable technology for olive oil pomaces waste valorization, contributing to enhance extraction of phenolic compounds and bioactive properties, especially when applied on extracted material.

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“…Nonetheless, the hydroxytyrosol cluster composition depends on the olive biomass type and the extraction conditions [ 11 , 12 ]. For example, olive leaves and olive leafy byproducts are richer in oleuropein, while olive fruits and its derived byproduct, olive pomace, contain more hydroxtyrosol, among other derivatives [ 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Olive Pomace-Derived Biomasses Fractionation through a Two-Step Extraction Based on the Use of Ultrasounds: Chemical Characteristics

Contreras

Gómez‐Cruz

Romero

et al. 2021

Foods

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Olive-derived biomass is not only a renewable bioenergy resource but also it can be a source of bioproducts, including antioxidants. In this study, the antioxidant composition of extracted olive pomace (EOP) and a new byproduct, the residual fraction from olive pit cleaning (RFOPC or residual pulp) was characterized and compared to olive leafy biomass, which have been extensively studied as a source of antioxidants and other bioactive compounds with pharmacological properties. The chemical characterization showed that these byproducts contain a high amount of extractives; in the case of EOP, it was even higher (52.9%) than in olive leaves (OL) and olive mill leaves (OML) (35.8–45.1%). Then, ultrasound-assisted extraction (UAE) was applied to recover antioxidants from the extractive fraction of these biomasses. The solubilization of antioxidants was much higher for EOP, correlating well with the extractives content and the total extraction yield. Accordingly, this also affected the phenolic richness of the extracts and the differences between all biomasses were diminished. In any case, the phenolic profile and the hydroxytyrosol cluster were different. While OL, OML, and EOP contained mainly hydroxytyrosol derivatives and flavones, RFOPC presented novel trilignols. Other compounds were also characterized, including secoiridoids, hydroxylated fatty acids, triterpenoids, among others, depending on the bioresource. Moreover, after the UAE extraction step, alkaline extraction was applied recovering a liquid and a solid fraction. While the solid fraction could of interest for further valorization as a biofuel, the liquid fraction contained proteins, sugars, and soluble lignin, which conferred antioxidant properties to these extracts, and whose content depended on the biomass and conditions applied.

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Obtaining an Extract Rich in Phenolic Compounds from Olive Pomace by Pressurized Liquid Extraction

Cited by 77 publications

References 34 publications

Antioxidants of Natural Plant Origins: From Sources to Food Industry Applications

Antioxidants of Natural Plant Origins: From Sources to Food Industry Applications

The use of gamma radiation for extractability improvement of bioactive compounds in olive oil wastes

Olive Pomace-Derived Biomasses Fractionation through a Two-Step Extraction Based on the Use of Ultrasounds: Chemical Characteristics

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