Mass Transfer Enhancement for Solid–Liquid Extractions

Both, Simon; Strube, Jochen; Cravatto, Giancarlo

doi:10.1002/9783527676828.ch4

Cited by 12 publications

(8 citation statements)

References 36 publications

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“…Ultrasound-assisted extraction is a green and economically viable alternative to conventional techniques for food and natural products [17], where extraction enhancement is mainly attributed to acoustic cavitation [18] producing plant cell disruption along with solvent penetration into the cell [19]. Polyphenolic compounds are commonly obtained by extraction with organic solvents (methanol, ethanol and acetone) so ultrasound assisted extraction implies less time of processing to obtain the same results bearing more efficiency [20,19,21].…”

Section: Introductionmentioning

confidence: 99%

Assessment of antioxidant, antidiabetic, antiobesity, and anti-inflammatory properties of a Tannat winemaking by-product

Fernández-Fernández

Iriondo‐DeHond

Dellacassa

et al. 2019

Eur Food Res Technol

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Winemaking industry produces large amounts of by-products (grape pomace or marc) every year, making necessary a sustainable management of such waste. Among red wines, Tannat variety possesses a unique polyphenolic profile. Consequently, the study of the bioactive properties of its by-product and the extraction optimization of its bioactive compounds is of great interest to state its health promoting potential. In this study, different extraction processes were tested: maceration with ethanol (95 %), ultrasound assisted ethanolic extraction optimization with surface methodology, ultrasound assisted aqueous extraction and hydro-alcoholic-acid extraction (EHAA). Using this last extraction procedure higher polyphenolic content (11.459±1.048 g GAE/100g of dry extract), monomeric anthocyanins (2.030±0.085 g Cyd/100g of dry extract), antioxidant capacity (0.474±0.036 mg/mL for ABTS and 0.715±0.063 µmol TE/mg of dry extract for ORAC-FL), -glucosidase (IC50 888.5±79.3 µg/mL) and pancreatic lipase inhibition capacity (IC50 2431.0±79.9 µg/mL) was found on Tannat grape skin. Considering as a whole, these results may imply a great antidiabetic and antiobesity potential. Moreover, EHAA showed to have anti-inflammatory capacity (IC50 587 µg/mL) on RAW 264.7 cells. In summary, EHAA possesses great potential as a functional ingredient for prevention and/or treatment of chronic diseases.

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Section: Introductionmentioning

confidence: 99%

Assessment of antioxidant, antidiabetic, antiobesity, and anti-inflammatory properties of a Tannat winemaking by-product

Fernández-Fernández

Iriondo‐DeHond

Dellacassa

et al. 2019

Eur Food Res Technol

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“…The MW radiation increases the local temperature leading to an increase of the internal pressure of plant cells. The plant cells are primarily comprised of a vacuole filled with intracellular water and secondary metabolites that consequently rupture under pressure [30] and promote kinetics [31]. The PEF-assisted technique is based on the electroporation phenomenon of the cell membranes, when a potential difference arises across a membrane [32,33].…”

Section: Introductionmentioning

confidence: 99%

Polyphenols from Red Vine Leaves Using Alternative Processing Techniques

Bachtler

Bart

2018

Processes

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The extraction kinetics of polyphenols, which are leached from red vine leaves, are studied and evaluated using a laboratory robot and nonconventional processing techniques such as ultrasonic (US)-, microwave (MW)-, and pulsed electric field (PEF)-assisted extraction processes. The robotic high-throughput screening reveals optimal extraction conditions at a pH value of 2.5, a temperature of 56 •

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“…In some cases, solid-phase extractions (SPE) were also carried out and decreased both the amount of solvent and the number of extraction cycles, offering high enrichment factors [ 39 , 40 ]. Actually, the mass transfer enhancement for SLE has been largely studied and applied, contributing to technology innovation, process intensification and integration, and energy saving, especially important for microwave, ultrasound, and high-pressure processing, for instance [ 41 ]. An overview of these techniques and related examples will be discussed in this section.…”

Section: High Value-added Approaches For Green and Sustainable Separamentioning

confidence: 99%

“…Traditionally, solvent treatment is performed at room temperature, although heating can promote higher recoveries to these compounds that are not thermosensitive. In some cases, LLE and SLE can be time-consuming, demanding further purification and concentration steps, which are their main drawbacks [ 41 , 45 ].…”

Section: High Value-added Approaches For Green and Sustainable Separamentioning

confidence: 99%

Green and Sustainable Separation of Natural Products from Agro-Industrial Waste: Challenges, Potentialities, and Perspectives on Emerging Approaches

2018

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New generations of biorefinery combine innovative biomass waste resources from different origins, chemical extraction and/or synthesis of biomaterials, biofuels, and bioenergy via green and sustainable processes. From the very beginning, identifying and evaluating all potentially high value-added chemicals that could be removed from available renewable feedstocks requires robust, efficient, selective, reproducible, and benign analytical approaches. With this in mind, green and sustainable separation of natural products from agro-industrial waste is clearly attractive considering both socio-environmental and economic aspects. In this paper, the concepts of green and sustainable separation of natural products will be discussed, highlighting the main studies conducted on this topic over the last 10 years. The principal analytical techniques (such as solvent, microwave, ultrasound, and supercritical treatments), by-products (e.g., citrus, coffee, corn, and sugarcane waste) and target compounds (polyphenols, proteins, essential oils, etc.) will be presented, including the emerging green and sustainable separation approaches towards bioeconomy and circular economy contexts.

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Mass Transfer Enhancement for Solid–Liquid Extractions

Cited by 12 publications

References 36 publications

Assessment of antioxidant, antidiabetic, antiobesity, and anti-inflammatory properties of a Tannat winemaking by-product

Assessment of antioxidant, antidiabetic, antiobesity, and anti-inflammatory properties of a Tannat winemaking by-product

Polyphenols from Red Vine Leaves Using Alternative Processing Techniques

Green and Sustainable Separation of Natural Products from Agro-Industrial Waste: Challenges, Potentialities, and Perspectives on Emerging Approaches

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