scholarly journals Recovery of Aromatic Aglycones from Grape Pomace Winemaking By-Products by Using Liquid-Liquid and Pressurized-Liquid Extraction

2013 ◽  
Vol 7 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Carolina Muñoz-González ◽  
Juan J. Rodríguez-Bencomo ◽  
Pedro J. Martín-Álvarez ◽  
M. Victoria Moreno-Arribas ◽  
M. Ángeles Pozo-Bayón
Keyword(s):  
Liquid Extraction ◽  
Grape Pomace ◽  
Pressurized Liquid Extraction ◽  
By Products

scholarly journals Hot Pressurized Liquid Extraction of Polyphenols from the Skin and Seeds of Vitis vinifera L. cv. Negra Criolla Pomace a Peruvian Native Pisco Industry Waste

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 866
Author(s):  
Erik E. Allcca-Alca ◽  
Nilton C. León-Calvo ◽  
Olivia M. Luque-Vilca ◽  
Maximiliano Martínez-Cifuentes ◽  
José Ricardo Pérez-Correa ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Ethanol Concentration ◽  
Liquid Extraction ◽  
Grape Pomace ◽  
Pressurized Liquid Extraction ◽  
Vitis Vinifera L ◽  
Solvent Mixtures ◽  
Total Polyphenol ◽  
Industry Waste ◽  
Potential Applications

The pisco industry in Peru generates large amounts of grape pomace, which is a natural source of bioactive compounds with potential nutraceutical applications. Hot pressurized liquid extraction (HPLE) with water-ethanol solvent mixtures (20–60%) at high temperatures (100–160 °C) was applied to recover polyphenols from the skin and seeds of a Peruvian pisco-industry grape-pomace waste. At the same HPLE conditions (60% ethanol, 160 °C), the seed fraction extracts contained ~6 times more total polyphenol and presented ~5 times more antioxidant activity than the extract from the skin fraction. The lowest ethanol concentration (20%) and the highest temperature (160 °C) achieved the highest recovery of flavanols with 163.61 µg/g dw from seeds and 10.37 µg/g dw from skins. The recovery of phenolic acids was maximized at the highest ethanol concentration and temperature with 45.34 µg/g dw from seeds and 6.93 µg/g dw from skins. Flavonols were only recovered from the skin, maximized (17.53 µg/g dw) at 20% of ethanol and the highest temperature. The recovery of specific polyphenols is maximized at specific extraction conditions. These conditions are the same for seed and skin extractions. This alternative method can be used in other agroindustrial wastes in order to recover bioactive compounds with potential applications in the pharmaceutical and food industry.

scholarly journals Glycerol as Alternative Co-Solvent for Water Extraction of Polyphenols from Carménère Pomace: Hot Pressurized Liquid Extraction and Computational Chemistry Calculations

Biomolecules ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 474 ◽  
Author(s):  
Nils Leander Huamán-Castilla ◽  
María Salomé Mariotti-Celis ◽  
Maximiliano Martínez-Cifuentes ◽  
José Ricardo Pérez-Correa
Keyword(s):  
Hydrogen Bond ◽  
Computational Chemistry ◽  
Gallic Acid ◽  
Liquid Extraction ◽  
Grape Pomace ◽  
Water Extraction ◽  
Pressurized Liquid Extraction ◽  
Hydroxyl Group ◽  
Solvent Mixtures ◽  
Structure Property

Glycerol is a co-solvent for water extraction that has been shown to be highly effective for obtaining polyphenol extracts under atmospheric conditions. However, its efficacy under subcritical conditions has not yet been studied. We assessed different water-glycerol mixtures (15%, 32.5%, and 50%) in a hot pressurized liquid extraction system (HPLE: 10 MPa) at 90 °C, 120 °C, and 150 °C to obtain extracts of low molecular weight polyphenols from Carménère grape pomace. Under the same extraction conditions, glycerol as a co-solvent achieved significantly higher yields in polyphenols than ethanol. Optimal extraction conditions were 150 °C, with 32.5% glycerol for flavonols and 50% for flavanols, stilbenes, and phenolic acids. Considering gallic acid as a model molecule, computational chemistry calculations were applied to explain some unusual extraction outcomes. Furthermore, glycerol, methanol, ethanol, and ethylene glycol were studied to establish an incipient structure–property relationship. The high extraction yields of gallic acid obtained with water and glycerol solvent mixtures can be explained not only by the additional hydrogen bonds between glycerol and gallic acid as compared with the other alcohols, but also because the third hydroxyl group allows the formation of a three-centered hydrogen bond, which intensifies the strongest glycerol and gallic acid hydrogen bond. The above occurs both in neutral and deprotonated gallic acid. Consequently, glycerol confers to the extraction solvent a higher solvation energy of polyphenols than ethanol.

scholarly journals Chemical Properties of Vitis Vinifera Carménère Pomace Extracts Obtained by Hot Pressurized Liquid Extraction, and Their Inhibitory Effect on Type 2 Diabetes Mellitus Related Enzymes

Antioxidants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 472
Author(s):  
Nils Leander Huamán-Castilla ◽  
David Campos ◽  
Diego García-Ríos ◽  
Javier Parada ◽  
Maximiliano Martínez-Cifuentes ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Pure Water ◽  
Liquid Extraction ◽  
Grape Pomace ◽  
Pressurized Liquid Extraction ◽  
Water Glycerol ◽  
Synthetic Drug

Grape pomace polyphenols inhibit Type 2 Diabetes Mellitus (T2DM)-related enzymes, reinforcing their sustainable recovery to be used as an alternative to the synthetic drug acarbose. Protic co-solvents (ethanol 15% and glycerol 15%) were evaluated in the hot pressurized liquid extraction (HPLE) of Carménère pomace at 90, 120, and 150 °C in order to obtain extracts rich in monomers and oligomers of procyanidins with high antioxidant capacities and inhibitory effects on α-amylase and α-glucosidase. The higher the HPLE temperature (from 90 °C to 150 °C) the higher the total polyphenol content (~79%, ~83%, and ~143% for water-ethanol, water-glycerol and pure water, respectively) and antioxidant capacity of the extracts (Oxygen Radical Absorbance Capacity, ORAC), increased by ~26%, 27% and 13%, while the half maximal inhibitory concentration (IC50) decreased by ~65%, 67%, and 59% for water-ethanol, water-glycerol, and pure water extracts, respectively). Water-glycerol HPLE at 150 and 120 °C recovered the highest amounts of monomers (99, 421, and 112 µg/g dw of phenolic acids, flavanols, and flavonols, respectively) and dimers of procyanidins (65 and 87 µg/g dw of B1 and B2, respectively). At 90 °C, the water-ethanol mixture extracted the highest amounts of procyanidin trimers (13 and 49 µg/g dw of C1 and B2, respectively) and procyanidin tetramers of B2 di-O-gallate (13 µg/g dw). Among the Carménère pomace extracts analyzed in this study, 1000 µg/mL of the water-ethanol extract obtained, at 90 °C, reduced differentially the α-amylase (56%) and α-glucosidase (98%) activities. At the same concentration, acarbose inhibited 56% of α-amylase and 73% of α-glucosidase activities; thus, our grape HPLE extracts can be considered a good inhibitor compared to the synthetic drug.

scholarly journals Valorization of Blueberry By-Products (Vaccinium spp.): Antioxidants by Pressurized Liquid Extraction (PLE) and Kinetics Models

2021 ◽  
Vol 12 (2) ◽  
pp. 1692-1704
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Propylene Glycol ◽  
Bioactive Compounds ◽  
Antioxidant Properties ◽  
Liquid Extraction ◽  
Pressurized Liquid Extraction ◽  
Total Phenolic ◽  
Anthocyanin Content ◽  
By Products

Blueberry by-products are rich in bioactive compounds with antioxidant properties, such as phenolic compounds and anthocyanins. Pressurized liquid extraction (PLE) is an alternative to traditional methods in the obtention of bioactive compounds and can adjust pressure and temperature conditions to regulate the solubility of target compounds in the solvent. In this context, this study aimed to evaluate different solvents in the extraction of the compounds, antioxidants from the blueberry by-products obtained by using the PLE technique and evaluating Weibull and power-law models in the kinetics for extraction yield, total phenolic content (TPC), and monomeric anthocyanin content (MAC). Extract yields of 31.33 to 48.98% (m/m) were obtained. The highest yield was obtained using ethylene glycol 20% (v/v). The extracts present TPC between 3541.62 and 4116.62 mg GAE/100g dr, the propylene glycol 20% (v/v) presented the highest content. The extracts present a MAC between 801.06 and 1036.65 mg C3CE/100g dr, the methanol presented the highest content. The best antioxidant activity was demonstrated by the extract obtained using propylene glycol 20% (v/v) as a solvent, with IC50 of the 0.11 mg/mL, justified by the higher content of extracted phenolic compounds. All extracts presented good antioxidant activity, and the PLE technique can be used to obtain biocomposites blueberry by-products.

Pressurized liquid extraction to obtain chia seeds oils extracts enriched in tocochromanols. Nanoemulsions approaches to preserve the antioxidant potential

2021 ◽  
Author(s):  
Lucía Castro-Vázquez ◽  
Virginia Rodríguez-Robledo ◽  
María Plaza-Oliver ◽  
Manuel J. Santander-Ortega ◽  
M. Victoria Lozano ◽  
...  
Keyword(s):  
Liquid Extraction ◽  
Pressurized Liquid Extraction ◽  
Antioxidant Potential

scholarly journals Microwave Assisted Extraction and Pressurized Liquid Extraction of Sulfated Polysaccharides from Fucus virsoides and Cystoseira barbata

Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1481
Author(s):  
Ana Dobrinčić ◽  
Sandra Pedisić ◽  
Zoran Zorić ◽  
Mladenka Jurin ◽  
Marin Roje ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Liquid Extraction ◽  
Pressurized Liquid Extraction ◽  
Sulfate Group ◽  
Sulfated Polysaccharides ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Cystoseira Barbata

Sulfated polysaccharide fucoidan isolated from brown algae shows a wide range of biological activities that are significantly dependent on its chemical composition, which is closely related to the applied technique and extraction parameters. Therefore, the objective of this study was to evaluate the influence of microwave assisted extraction (MAE) and pressurized liquid extraction (PLE) parameters (solvent, temperature, time, and number of cycles) on the Fucus virsoides and Cystoseira barbata polysaccharide yield (%PS) and chemical composition (total sugar, fucose, and sulfate group). The optimal MAE parameters that resulted in the highest polysaccharide extraction from F. virsoides and C. barbata were 0.1 M H2SO4 for 10 min at 80 °C, while the optimal PLE parameters were 0.1 M H2SO4, for two cycles of 15 min at 140 °C. Furthermore, the %PS, chemical structure, molecular properties, and antioxidant activity of the F. virsoides and C. barbata polysaccharide extracts obtained with MAE, PLE, and conventional extraction (CE) performed under previously determinate optimal conditions were compared. PLE resulted in a significantly higher %PS from F. virsoides, while for C. barbata, a similar yield was achieved with CE and PLE, as well as CE and MAE, for both algae. Furthermore, the polysaccharides obtained using PLE had the highest polydispersity index, fucose, and sulfate group content, and the lowest uronic acid content; however their antioxidant activity was lower.

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