scholarly journals Ultrasound-Assisted Extraction of Antioxidants from Baccharis dracunculifolia and Green Propolis

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1530
Author(s):  
Renata Iara Cavalaro ◽  
Luis Felipe de Freitas Fabricio ◽  
Thais Maria Ferreira de Souza Vieira
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Southeastern Brazil ◽  
Total Phenolic ◽  
Ultrasound Assisted Extraction ◽  
Antioxidant Power ◽  
Assisted Extraction ◽  
Ultrasound Assisted

Baccharis dracunculifolia or rosemary-of-field is the principal botanical source used by Africanized bees Apis mellifera L. to produce green propolis in Southeastern Brazil. The phenolic compounds present in the plant and green propolis have been reported to be responsible for biological activities such as antioxidant capacity. This study aimed to optimize the ultrasound-assisted extraction of antioxidants compounds from rosemary-of-field using a central composite rotatable design (CCRD), and compare results to green propolis extract. An experimental design was performed to obtain responses of total phenolic content and antioxidant capacity. The results allowed observing that the optimum condition for both Baccharis dracunculifolia floral bud and raw green propolis antioxidant extraction was obtained with 99% ethanol solution. In this condition, Total Phenolic Content (TPC), Ferric Reducing Antioxidant Power (FRAP), and 2,2-diphenyl-1-picryl-hydrazyl (DPPH) values were 612.14 mg GAE. g−1 sample, 534.39 µM ferrous sulfate g−1 sample, and 72.37 µmol TEAC. g−1 sample, respectively, for floral buds. These results have confirmed that optimization is a key step for effective and sustainable extraction processes to be feasible on an industrial scale. The proposed process can be easily adopted on a larger scale, as it uses very few inputs and presents straightforward steps, with the advantage of high efficiency in the extraction of phenolic compounds from the studied matrices compared to the results from the literature. The high concentration of antioxidants indicates that the products obtained can be considered as a sustainable bioactive source for food and cosmetic purposes.

scholarly journals Optimization of Ultrasound-Assisted Extraction of Phenolic Compounds from Black Locust (Robiniae Pseudoacaciae) Flowers and Comparison with Conventional Methods

Antioxidants ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 248 ◽  
Author(s):  
Ivana Savic Gajic ◽  
Ivan Savic ◽  
Ivana Boskov ◽  
Stanko Žerajić ◽  
Ivana Markovic ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Total Phenolic Content ◽  
Plant Material ◽  
Phenolic Content ◽  
Black Locust ◽  
Extraction Time ◽  
Total Phenolic ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted

The aim of this study was to optimize the ultrasound-assisted extraction of phenolic compounds from black locust (Robiniae pseudoacaciae) flowers using central composite design. The ethanol concentration (33–67%), extraction temperature (33–67 °C), and extraction time (17–33 min) were analyzed as the factors that impact the total phenolic content. The liquid-to-solid ratio of 10 cm3 g−1 was the same during extractions. The optimal conditions were found to be 59 °C, 60% (v/v) ethanol, and extraction time of 30 min. The total phenolic content (TPC = 3.12 gGAE 100 g−1 dry plant material) and antioxidant activity (IC50 = 120.5 µg cm−3) of the extract obtained by ultrasound-assisted extraction were compared with those obtained by maceration (TPC = 2.54 gGAE 100 g−1 dry plant material, IC50 = 150.6 µg cm−3) and Soxhlet extraction (TPC = 3.22 gGAE 100 g−1 dry plant material, IC50 = 204.2 µg cm−3). The ultrasound-assisted extraction gave higher total phenolic content and better antioxidant activity for shorter extraction time so that it represents the technique of choice for the extraction of phenolic compounds. The obtained extract, as the source of antioxidants, can be applied in the pharmaceutical and food industries.

scholarly journals The influence of extraction method on antioxidant potential of Tilia argentea flowers and bracts

2020 ◽  
Vol 31 (1) ◽  
pp. 14-17 ◽  
Author(s):  
Serap Ayaz Seyhan ◽  
Zümrüt Yilmaz ◽  
Deniz Çikla Yilmaz
Keyword(s):  
Total Phenolic Content ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Antioxidant Potential ◽  
Total Phenolic ◽  
Ultrasound Assisted Extraction ◽  
Antioxidant Power ◽  
Assisted Extraction ◽  
Ultrasound Assisted

AbstractThe objective of this work was to compare the extraction of phenolic compounds from Tilia argentea flowers and bracts by using conventional (solvent extraction) and novel (ultrasound assisted) extraction methods. Ethanol (70 %) extracts were analyzed for their antioxidant activities. Total phenolic content was determined using Folin-Ciocalteu method and the antioxidant potential was determined by DPPH radical scavenging and Ferric Reducing Antioxidant Power (FRAP) assays. To determine the effect of ultrasound treatment on the extraction, same extraction parameters were applied in both methods. The results showed that extracts obtained by ultrasound assisted extraction have higher total phenolic content and antioxidant activity.

Ultrasound-Assisted Extraction of Polyphenols from Pomelo (Citrus Grandis Limonia Osbeck L.) Peel

2021 ◽  
Vol 31 (4) ◽  
pp. 32-37
Keyword(s):  
Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Solvent Ratio ◽  
Sonication Time ◽  
Ultrasound Assisted Extraction ◽  
Total Polyphenol ◽  
Pomelo Peel ◽  
Assisted Extraction

The pomelo peel occupies 50% of the fruit mass in pomelo juice processing. It contains large amounts of phenolic compounds, which may provide benefits to human health. These components should be isolated. In this study, the effects of ethanol concentrations, material-to-solvent ratios (g/mL), temperatures and sonication time on total phenolic content (TPC), naringin content and antioxidant capacity (using DPPH assay) of extract solution was evaluated. The results showed that all experimental factors significantly influenced the extraction of total polyphenol content, naringin content, and antioxidant capacity of the extract. The extraction condition was ethanol 80%, material-to-solvent ratio of 1:25 (w/v) at 60oC, and sonication time of 7.5 min, gave the extract had total phenolic content of 9.05 ± 0.08 mg GAE/g DM, naringin content of 4.65 ± 0.08 mg NE/ g DM, and antioxidant capacity of 4.76 ± 0.03 mg AAE/g DM. The ultrasound treatment was a useful method for improving the extraction of phenolic acid compounds from pomelo peel.

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 and Antioxidant Capacity for the Valorization of Elaeocarpus serratus L. Leaves

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1218
Author(s):  
Ying-Hsuan Chen ◽  
Chun-Yao Yang
Keyword(s):  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
Total Phenolic ◽  
Solvent Ratio ◽  
Order Kinetic ◽  
Ultrasound Assisted Extraction ◽  
Sulfate Heptahydrate ◽  
Antioxidant Power ◽  
Assisted Extraction ◽  
Ultrasound Assisted

Elaeocarpus serratus L. leaves contain significant polyphenols, flavonoids, and myricitrin with medicinal property, which are byproducts after harvest and can be recovered for potential food applications. In this study, the effective extraction method for bioactive compounds and myricitrin from Elaeocarpus serratus L. leaves was investigated by comparing ultrasound-assisted extraction (UAE) and shaking-assisted extraction (SAE) for total phenolic content (TPC), total flavonoid content (TFC), myricitrin, and antioxidant capacity (as ferric reducing antioxidant power, FRAP). A first-order kinetic model of extraction was also proposed to correlate the observed extraction rate coefficient and limiting concentration of myricitrin in various solvents. Using defatted leaves (DL) as the substrate at the UAE condition of 95% ethanol with 1/10 (g/mL) of DL to solvent ratio under 40 kHz/300 W of ultrasound, 26.63% of yield of extract, and 199.75 mg-ferrous-sulfate-heptahydrate-equivalent/g-DL of FRAP were obtained. Further, the bioactive compounds extracted were 92.35 mg-gallic-acid-equivalent/g-DL of TPC, 53.14 mg-rutin-equivalent/g-DL of TFC, and 4.41 mg/g-DL of myricitrin, which were 1.53, 1.44, and 1.4 folds using SAE at 120 rpm, respectively. This showed that UAE was more efficient than SAE in bioactive compounds recovery for valorization of Elaeocarpus serratus L. leaves.

scholarly journals Exhausted Olive Pomace Phenolic-Rich Extracts Obtention: A First Step for a Biorefinery Scheme Proposal

Proceedings ◽  
2020 ◽  
Vol 70 (1) ◽  
pp. 10
Author(s):  
Irene Gómez-Cruz ◽  
Inmaculada Romero ◽  
María del Mar Contreras ◽  
Carmen Padilla-Rascón ◽  
Florbela Carvalheiro ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Added Value ◽  
Total Phenolic ◽  
Olive Pomace ◽  
Residual Oil ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted

The exhausted olive pomace (EOP) is the main residue generated year-round after the extraction of the residual oil contained in the olive pomace. Due to its chemical composition, EOP is an interesting bioresource for the production of bioenergy and high added-value products. Therefore, the purpose of this study was to evaluate the extraction of antioxidants from EOP using sequential ultrasound-assisted extraction (UAE) and maceration with constant stirring. Water and 70% acetone were used as solvents. The total phenolic content was determined by the Folin–Ciocalteu method, the antioxidant capacity was investigated and the phenolic extracts were also characterized.

scholarly journals High-Throughput Screening and Characterization of Phenolic Compounds in Stone Fruits Waste by LC-ESI-QTOF-MS/MS and Their Potential Antioxidant Activities

Antioxidants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 234 ◽  
Author(s):  
Yili Hong ◽  
Zening Wang ◽  
Colin J. Barrow ◽  
Frank R. Dunshea ◽  
Hafiz A. R. Suleria
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Prunus Persica ◽  
Phenolic Content ◽  
Antioxidant Potential ◽  
Stone Fruit ◽  
Total Phenolic ◽  
Stone Fruits ◽  
Antioxidant Power ◽  
Pharmaceutical Industries

Stone fruits, including peach (Prunus persica L.), nectarine (Prunus nucipersica L.), plum (Prunus domestica L.) and apricot (Prunus armeniaca L.) are common commercial fruits in the market. However, a huge amount of stone fruits waste is produced throughout the food supply chain during picking, handling, processing, packaging, storage, transportation, retailing and final consumption. These stone fruits waste contain high phenolic content which are the main contributors to the antioxidant potential and associated health benefits. The antioxidant results showed that plum waste contained higher concentrations of total phenolic content (TPC) (0.94 ± 0.07 mg gallic acid equivalents (GAE)/g) and total flavonoid content (TFC) (0.34 ± 0.01 mg quercetin equivalents (QE)/g), while apricot waste contained a higher concentration of total tannin content (TTC) (0.19 ± 0.03 mg catechin equivalents (CE)/g) and DPPH activity (1.47 ± 0.12 mg ascorbic acid equivalents (AAE)/g). However, nectarine waste had higher antioxidant capacity in ferric reducing-antioxidant power (FRAP) (0.98 ± 0.02 mg AAE/g) and total antioxidant capacity (TAC) (0.91 ± 0.09 mg AAE/g) assays, while peach waste showed higher antioxidant capacity in 2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) assay (0.43 ± 0.09 mg AAE/g) as compared to other stone fruits waste. Qualitative and quantitative phenolic analysis of Australian grown stone fruits waste were conducted by liquid chromatography coupled with electrospray-ionization quadrupole time-of-flight mass spectrometry (LC-ESI-QTOF-MS/MS) and HPLC-photodiode array detection (PDA). The LC-ESI-QTOF-MS/MS result indicates that 59 phenolic compounds were tentatively characterized in peach (33 compounds), nectarine (28), plum (38) and apricot (23). The HPLC-PDA indicated that p-hydroxybenzoic acid (18.64 ± 1.30 mg/g) was detected to be the most dominant phenolic acid and quercetin (19.68 ± 1.38 mg/g) was the most significant flavonoid in stone fruits waste. Hence, it could be concluded that stone fruit waste contains various phenolic compounds and have antioxidant potential. The results could support the applications of these stone fruit wastes in other food, feed, nutraceutical and pharmaceutical industries.

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