Recovery of bioactive compounds from beet leaves through simultaneous extraction: Modelling and process optimization

Bengardino, Macarena; Fernández, María Verónica; Nutter, Julia; Jagus, Rosa Juana; Agüero, María Victoria

doi:10.1016/j.fbp.2019.09.013

Cited by 41 publications

(42 citation statements)

References 35 publications

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“…The temperature increase cannot be neglected or unknown, especially when ultrasound is applied as a non‐thermal technology. However, when used as extracting technology, the heat generated in the medium may be beneficial for improving extraction yields, since high temperatures have been proven to accelerate and maximize polyphenol extraction from BLs 15 …”

Section: Resultsmentioning

confidence: 99%

“…Numerous process variables are known to influence the extraction rate of bioactive compounds from food matrices, including extraction time, temperature, pH, solid:liquid ratio, solvent composition, matrix particle size, UP, among others 15,18–20 . In the present study, in which a green‐solvent UAE process is under development (as conventionally used organic solvents were replaced by water), the process variables were UP ( X 1 ), solid:liquid ratio ( X 2 ), and extraction time ( X 3 ).…”

Section: Methodsmentioning

confidence: 93%

“…TPC, BXs, and BCs were determined for each essay, and the second‐order polynomial model (Eqn (2)) was fitted to each response variable. To achieve the optimal conditions that maximize TPC, BXs, and BCs yields, simultaneous optimization was carried out using the Desirability function with the Larger‐the Best criteria, as described by Bengardino et al 15 …”

Section: Methodsmentioning

confidence: 99%

“…polyphenols and betalains) 3 that could be recovered in order to improve the efficiency of plant utilization and increasing sustainability within the production systems and agri‐food chain. In fact, the extraction of phytochemicals from this vegetal matrix was previously studied by optimizing temperature, ratio, and ethanol concentration during macerations 15 . In particular, the enrichment of a fruit and vegetable beverage with desolvated BL extract increased the shelf life and antioxidant capacity of this product, demonstrating the potential of BL to develop high value‐added foods 16 .…”

Section: Introductionmentioning

confidence: 99%

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Development of an aqueous ultrasound‐assisted extraction process of bioactive compounds from beet leaves: a proposal for reducing losses and increasing biomass utilization

et al. 2020

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BACKGROUND Red beet plants are cultivated worldwide for the consumption of their roots, generating large amounts of unexploited by‐products. In particular, beet leaves (BLs) represent about 50% of the whole plant and are usually discarded as waste. This constitutes not only an economic issue, since multiple resources invested in the production will be wasted, but also an environmental problem because of the pollution associated with their disposal. However, BLs comprise an important source of functional compounds (polyphenols and betalains) that could be recovered from the raw material, representing a sustainable solution for the underutilization of this by‐product. This study proposes the recovery of polyphenols and betalains using an aqueous ultrasound‐assisted extraction (UAE) process at different powers (35, 50, and 100 W) that was characterized and optimized. RESULTS UAE significantly enhanced the recovery of bioactive compounds and shortened the time required for extraction in comparison with traditional macerations (35 < 50 < 100 W). During UAE, the temperature of the systems increased as a function of the power applied, favouring the recovery of these phytochemicals. Additionally, a Box–Behnken design and response surface methodology were employed to optimize UAE conditions (90 W ultrasound power, 1:20 solid:liquid ratio, 16 min extraction time), under which the yields were 14.9 mg g−1 (polyphenols), 949.1 μg g−1 (betaxanthins), and 562.2 μg g−1 (betacyanins), consistent with the values predicted by the models. CONCLUSION This study enabled the development of a green‐solvent UAE process that constitutes an effective post‐harvest by‐products strategy to minimize losses and increase biomass utilization through the recovery of bioactive compounds from BLs, promoting sustainability in the agri‐food chain. © 2020 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of an aqueous ultrasound‐assisted extraction process of bioactive compounds from beet leaves: a proposal for reducing losses and increasing biomass utilization

et al. 2020

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“…Conventional methods to recover polyphenols from plant materials are based on the use of maceration assisted by organic solvents such as methanol, hexane, etc. However, long extraction times, environmental toxicity, consumption of large quantities of organic solvents, and safety aspects linked to the handling of these substances are the major drawbacks arising from these methods [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Biologically Active Compounds from Goji (Lycium Barbarum L.) Leaves Aqueous Extracts: Purification and Concentration by Membrane Processes

2020

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Goji (Lycium barbarum L.) leaves and fruits have been described as a valuable source of bioactive compounds with a great potential for the development of health-promoting formulations. The present study aimed to evaluate the potential of a sustainable process for the recovery of phenolic compounds from Goji leaves through a combination of aqueous extraction and membrane-based operations. Water was used as a safe, cheap, and non-hazardous extraction solvent, and parameters of extraction of dried Goji leaves were optimized in order to maximize the yield of polyphenols, total soluble solids (TSS), and total antioxidants simultaneously. The aqueous extract was clarified by ultrafiltration and then processed with three flat-sheet polyethersulphone (PES) membranes with molecular weight cut-off (MWCO) values in the range of 0.3–4.0 kDa, in order to remove sugar compounds from polyphenols and improve the antioxidant activity of the produced fractions. Among the selected membranes, a 1 kDa membrane exhibited the best performance in terms of purification of polyphenols from the clarified aqueous extract. The rejection by this membrane of TSS and total carbohydrates was in the range of 15.8–25.3%, and was decreased by increasing the volume reduction factor (VRF). On the other hand, the retention values for total polyphenols and total antioxidant activity (TAA) were in the range of 73–80%, and were increased by increasing the VRF.

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Optimization of green extraction of high‐value components from Eugenia uniflora leaves: Thermal stability and in‐vitro biological activity

et al. 2022

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Deep eutectic solvents (DES) were evaluated as a sustainable route to obtain bioactive compounds from Eugenia uniflora L. leaves (EUL). Completely randomized experimental designs determined the process conditions. The DES composed of cholinium chloride as hydrogen bond acceptor (HBA) and lactic acid, glycerol, or 1,2‐propanediol as hydrogen bond donor (HBD) showed the best extraction capacity. The better conditions were 150 min, 65°C, and a solid:liquid ratio of 1:30. The major constituents of the extracts, quantified by high‐performance liquid chromatography (HPLC), were naringin and caffeic acid. Moreover, the DES promoted a preservative effect on the EUL extracts against thermal treatments. All extracts exhibited high antioxidant and antiglycation activities and iron‐chelating potential. Moreover, when lactic acid was the HBD, the extracts showed considerable antibacterial activity. Therefore, it was effectively proposed as an effective and green route to obtain extracts with potential applications in the food, cosmetic, and pharmaceutical industries.

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Recovery of bioactive compounds from beet leaves through simultaneous extraction: Modelling and process optimization

Cited by 41 publications

References 35 publications

Development of an aqueous ultrasound‐assisted extraction process of bioactive compounds from beet leaves: a proposal for reducing losses and increasing biomass utilization

Development of an aqueous ultrasound‐assisted extraction process of bioactive compounds from beet leaves: a proposal for reducing losses and increasing biomass utilization

Biologically Active Compounds from Goji (Lycium Barbarum L.) Leaves Aqueous Extracts: Purification and Concentration by Membrane Processes

Optimization of green extraction of high‐value components from Eugenia uniflora leaves: Thermal stability and in‐vitro biological activity

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