scholarly journals Pressurized Liquid Extraction (PLE) as an Innovative Green Technology for the Effective Enrichment of Galician Algae Extracts with High Quality Fatty Acids and Antimicrobial and Antioxidant Properties

Marine Drugs ◽  
2018 ◽  
Vol 16 (5) ◽  
pp. 156 ◽  
Author(s):  
Paz Otero ◽  
Somaris Quintana ◽  
Guillermo Reglero ◽  
Tiziana Fornari ◽  
Mónica García-Risco
Keyword(s):  
Fatty Acids ◽  
Antioxidant Properties ◽  
Liquid Extraction ◽  
Green Technology ◽  
Pressurized Liquid Extraction ◽  
High Quality

scholarly journals Pressurized Liquid Extraction of Polyphenols and Anthocyanins from Saffron Processing Waste with Aqueous Organic Acid Solutions: Comparison with Stirred-Tank and Ultrasound-Assisted Techniques

2021 ◽  
Vol 13 (22) ◽  
pp. 12578
Author(s):  
Vasileios M. Pappas ◽  
Vassilis Athanasiadis ◽  
Dimitrios Palaiogiannis ◽  
Konstantina Poulianiti ◽  
Eleni Bozinou ◽  
...  
Keyword(s):  
Antioxidant Properties ◽  
Reducing Power ◽  
Hierarchical Cluster ◽  
Liquid Extraction ◽  
Specific Pattern ◽  
Pressurized Liquid Extraction ◽  
Stirred Tank ◽  
Green Solvents ◽  
Processing Waste ◽  
Polyphenolic Composition

Fοllow up with our previous study on the extraction of saffron processing waste polyphenols using deep eutectic solvents, the objective of this examination was a comparative evaluation of pressurized liquid extraction (PLE), stirred-tank extraction (STE) and stirred-tank extraction with ultrasonication pretreatment (STE/UP) with respect to the recovery of pigments and antioxidant polyphenols from saffron processing waste. Aqueous solutions of citric and lactic acids at two different concentrations were used as green solvents. The extracts obtained under the specified conditions were analyzed for total pigment and total polyphenol yields as well as for their ferric-reducing power and antiradical activity. Furthermore, each produced extract was analyzed with liquid chromatography–mass spectrometry to profile its analytical polyphenolic composition. In all cases, PLE provided inferior results compared to the two other techniques, producing extracts with lower polyphenolic concentration and weaker antioxidant properties. On the other hand, no specific pattern was detected concerning the effect of ultrasonication, acid type and acid concentration. Hierarchical cluster analysis indicated that stirred-tank extraction with 1% (w/v) lactic acid and ultrasonication pretreatment might be the highest-performing combination, providing extracts with increased polyphenol and pigment concentration; however, it also enhanced antioxidant activity. It was also concluded that the significantly shorter extraction time when using PLE might be an important element in further optimizing the process, buttressing the use of this technique for the establishment of innovative and sustainable-by-design extraction methodologies.

Antioxidant properties of wheat and rye bran extracts obtained by pressurized liquid extraction with different solvents

2015 ◽  
Vol 62 ◽  
pp. 117-123 ◽  
Author(s):  
Darius Povilaitis ◽  
Vaida Šulniūtė ◽  
Petras Rimantas Venskutonis ◽  
Vaida Kraujalienė
Keyword(s):  
Antioxidant Properties ◽  
Liquid Extraction ◽  
Pressurized Liquid Extraction

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.

Comparison of soxhlet, ultrasound-assisted and pressurized liquid extraction of terpenes, fatty acids and Vitamin E from Piper gaudichaudianum Kunth

2006 ◽  
Vol 1105 (1-2) ◽  
pp. 115-118 ◽  
Author(s):  
Valéria Flores Péres ◽  
Jenifer Saffi ◽  
Maria Inês S. Melecchi ◽  
Fernanda C. Abad ◽  
Rosângela de Assis Jacques ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Vitamin E ◽  
Liquid Extraction ◽  
Pressurized Liquid Extraction ◽  
Ultrasound Assisted ◽  
Piper Gaudichaudianum

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
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