scholarly journals Ultrasound-assisted extraction kinetics, fatty acid profile, total phenolic content and antioxidant activity of green solvents' extracted passion fruit oil

2015 ◽  
Vol 50 (8) ◽  
pp. 1831-1838 ◽  
Author(s):  
Sin Yee Lee ◽  
Sin Yin Fu ◽  
Gun Hean Chong
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Green Solvents ◽  
Extraction Kinetics ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Fruit Oil ◽  
Passion Fruit Oil

scholarly journals Microwave-Assisted Extraction and Ultrasound-Assisted Extraction of Bioactive Compounds from Grape Pomace

2020 ◽  
Vol 16 (1-2) ◽  
Author(s):  
Cassiano Brown da Rocha ◽  
Caciano Pelayo Zapata Noreña
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Bioactive Compounds ◽  
Grape Pomace ◽  
Total Phenolic ◽  
Microwave Assisted Extraction ◽  
Ultrasound Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Ultrasound Assisted

AbstractThe grape pomace is a by-product from the industrial processing of grape juice, which can be used as a source of bioactive compounds. The aim of this study was to separate the phenolic compounds from grape pomace using an acidic aqueous solution with 2 % citric acid as a solvent, using both ultrasound-assisted extraction, with powers of 250, 350 and 450 W and times of 5, 10 and 15 min, and microwave-assisted extraction using powers of 600, 800 and 1,000 W and times of 5, 7 and 10 min. The results showed that for both methods of extraction, the contents of total phenolic compounds and antioxidant activity by ABTS and DPPH increased with time, and microwave at 1,000 W for 10 min corresponded to the best extraction condition. However, the contents of phenolic compounds and antioxidant activity were lower than exhaustive extraction using acidified methanol solution.

scholarly journals Optimization of Ultrasound-Assisted Extraction via Sonotrode of Phenolic Compounds from Orange By-Products

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 1120
Author(s):  
María del Carmen Razola-Diaz ◽  
Eduardo Jesús Guerra-Hernández ◽  
Celia Rodríguez-Pérez ◽  
Ana María Gómez-Caravaca ◽  
Belén García-Villanova ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
High Performance ◽  
Phenolic Content ◽  
Orange Peel ◽  
Polar Compounds ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Quantitative Analyses ◽  
Ultrasound Assisted

Orange peel is the main by-product from orange juice industry. It is a known source of bioactive compounds, mostly phenolic compounds, and it has been widely studied for its healthy activities. Thus, this research focuses on the establishment of ultrasound-assisted extraction of phenolic compounds in orange peel using a sonotrode. For this purpose, a Box–Behnken design of 27 experiments was carried out with four independent factors—ratio ethanol/water (v/v), time (min), amplitude (%), and pulse (%). Quantitative analyses of phenolic compounds were performed and the antioxidant activity was measured by ABTS and DPPH methods. The validity of the experimental design was confirmed by ANOVA and the optimal sonotrode extraction conditions were obtained by response surface methodology (RSM). The extracts obtained in the established conditions were analyzed by High Performance Liquid Chromatography (HPLC) coupled to mass spectrometer detector and 74 polar compounds were identified. The highest phenolic content and antioxidant activity were obtained using 45/55 ethanol/water (v/v), 35 min, amplitude 90% (110 W), and pulse 100%. The established method allows an increment of phenolics recovery up to 60% higher than a conventional extraction. Moreover, the effect of drying on phenolic content was also evaluated.

scholarly journals Optimization of Ultrasound Assisted Extraction of Functional Ingredients from Stevia Rebaudiana Bertoni Leaves

2015 ◽  
Vol 29 (2) ◽  
pp. 231-237 ◽  
Author(s):  
Jana Šic Žlabur ◽  
Sandra Voća ◽  
Nadica Dobričević ◽  
Mladen Brnčić ◽  
Filip Dujmić ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Extraction Procedure ◽  
Total Phenolic ◽  
Steviol Glycosides ◽  
Total Phenolic Compounds ◽  
Ultrasound Assisted Extraction ◽  
Probe Diameter ◽  
Assisted Extraction ◽  
Ultrasound Assisted

Abstract The aim of the present study was to reveal an effective extraction procedure for maximization of the yield of steviol glycosides and total phenolic compounds as well as antioxidant activity in stevia extracts. Ultrasound assisted extraction was compared with conventional solvent extraction. The examined solvents were water (100°C/24 h) and 70% ethanol (at 70°C for 30 min). Qualitative and quantitative analyses of steviol glycosides in the extracts obtained were performed using high performance liquid chromatography. Total phenolic compounds, flavonoids, and radical scavenging capacity by 2, 2-azino-di-3-ethylbenzothialozine- sulphonic acid) assay were also determined. The highest content of steviol glycosides, total phenolic compounds, and flavonoids in stevia extracts were obtained when ultrasound assisted extraction was used. The antioxidant activity of the extracts was correlated with the total amount of phenolic compounds. The results indicated that the examined sonication parameters represented as the probe diameter (7 and 22 mm) and treatment time (2, 4, 6, 8, and 10 min) significantly contributed to the yield of steviol glycosides, total phenolic compounds, and flavonoids. The optimum conditions for the maximum yield of steviol glycosides, total phenolic compounds, and flavonoids were as follows: extraction time 10 min, probe diameter 22 mm, and temperature 81.2°C.

Optimization of Total Phenol and Tannin Content and Biological Activity of Dittrichia graveolens (L.) GREUTER.

2020 ◽  
Vol 16 (2) ◽  
pp. 124-132 ◽  
Author(s):  
Mahsa Souri ◽  
Alireza Shakeri
Keyword(s):  
Total Phenolic Content ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Antibacterial Activities ◽  
Methanol Concentration ◽  
Total Phenolic ◽  
Tannin Content ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted

Background: Dittrichia graveolens (L.) is a strongly aromatic plant distributed in Mediterranean regions. This research concerns the optimization of the Total Phenolic Content (TPC) and the Total Tannin Content (TTC) of Dittrichia graveolens (L.) extracts using Response Surface Methodology for Ultrasound Assisted Extraction (UAE) and Microwave Assisted Extraction (MAE). Central Composite Design (CCD) was used to evaluate the effect of the solvent concentration and the extraction time, in different methods on TTC and TPC. The antioxidant activities and antibacterial activities were evaluated. Methods: The plant extracts were prepared using maceration, microwave and ultrasound assisted extraction. TPC and TTC were measured using Folin-Ciocalteu method. The antioxidant activities were studied using DPPH reagent and disc diffusion method was used to study the antibacterial activities. Results: This study showed the optimum condition for UAE was 49.96% methanol concentration and 11.2 min sonication, while for MAE was 55.44% methanol concentration and 2.26 min microwave extraction. It also indicated that MAE was the most effective method in comparison to UAE and maceration. The antioxidant activities of MAE extract (IC50=7.7mg/mL) were more than UAE extract (IC50=21.5mg/mL) and maceration (IC50=32.3mg/mL). Conclusion: As a conclusion, it was indicated that MAE was the most effective method. The higher total phenolic content caused higher antioxidant activities as MAE extract had the highest antioxidant activities. The antibacterial test showed the great potential of this plant as an antibacterial compound resource against different bacteria.

scholarly journals Ultrasound-assisted extraction of bioactive compounds from lemon balm and peppermint leaves

2016 ◽  
Vol 30 (1) ◽  
pp. 95-104 ◽  
Author(s):  
Jana Šic Žlabur ◽  
Sandra Voća ◽  
Nadica Dobričević ◽  
Stjepan Pliestić ◽  
Ante Galić ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Bioactive Compounds ◽  
Radical Scavenging ◽  
Ultrasonic Extraction ◽  
Total Phenolic ◽  
Total Phenols ◽  
Ultrasound Assisted Extraction ◽  
Lemon Balm ◽  
Assisted Extraction ◽  
Ultrasound Assisted

Abstract The aim of this study was to investigate the influence of conventional and ultrasound-assisted extraction (frequency, time, temperature) on the content of bioactive compounds as well as on the antioxidant activity of aqueous extracts from fresh lemon balm and peppermint leaves. Total phenols, flavonoids, non-flavonoids, total chlorophylls, total carotenoids, and radical scavenging capacity were determined. Moreover, the relationship between bioactive compounds and antioxidant capacity was studied by linear regression. A significant increase in all studied bioactive compounds during ultrasonic extraction for 5 to 20 min was found. With the classical extraction method, the highest amounts of total phenols, flavonoids, and antioxidant activity were determined, and the maximum amounts of total chlorophylls and carotenoids were determined during 20 min ultrasonic extraction. The correlation analysis revealed a strong, positive relationship between antioxidant activity and total phenolic compounds.

scholarly journals Optimization of Ultrasound Assisted Extraction of Phenolic Compounds from Orange By-Product

Proceedings ◽  
2020 ◽  
Vol 70 (1) ◽  
pp. 49
Author(s):  
María del Carmen Razola-Díaz ◽  
Eduardo Jesús Guerra-Hernández ◽  
Celia Rodríguez-Pérez ◽  
Ana María Gómez-Caravaca ◽  
Belén García-Villanova ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Orange Peel ◽  
Dry Weight ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Quantitative Analyses ◽  
Ultrasound Assisted

Orange peel (OP) is the main by-product from orange juice industry. OP is a known source of bioactive compounds and is widely studied for its antioxidant, anti-inflammatory, anti-cancer, anti-rheumatic, anti-diabetic and cardioprotective activities. Thus, this research focuses on the establishments of ultrasound-assisted extraction of phenolic compounds in orange peel using a sonotrode; objective framed in the European SHEALTHY (non-thermal physical technologies to preserve healthiness of fresh and minimally processed fruit and vegetables) project. For this purpose, a Box Behnken design of 27 experiments was carried out with 4 independent factors (ratio ethanol/water, time (min), amplitude (%) and pulse (%)). Quantitative analyses of total phenolic compounds (TPC) were performed by Folin-Ciocalteu method and the antioxidant activity was measured by ABTS and DPPH methods. The validity of the experimental design was confirmed by ANOVA and the optimal sonotrode extraction conditions were obtained by response surface methodology. The optimal extracts were characterized by HPLC coupled to mass spectrometer detectors. The highest phenolic content and antioxidant activity was obtained using 45/55 ethanol/water (v/v), 35 min, amplitude 90% (110 W) and pulse 100%. The established method allows the extraction of 30.42 mg of gallic acid equivalents/g dry weight of total phenolic compounds from OP; this value suppose an increment up to 60% higher than conventional extraction.

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