scholarly journals Optimization of ultrasound-assisted extraction of total polyphenolic compounds from Juglans nigra L. leaves

2018 ◽  
Vol 83 (11) ◽  
pp. 1273-1284 ◽  
Author(s):  
Marijana Gavrilovic ◽  
Katarina Rajkovic ◽  
Valentina Simic ◽  
Sanja Jeremic ◽  
Snjezana Mirkovic ◽  
...  
Keyword(s):  
Extraction Process ◽  
Relative Difference ◽  
Extraction Yield ◽  
Ethanol Solution ◽  
Juglans Nigra ◽  
Total Phenolic ◽  
Ultrasound Assisted Extraction ◽  
Commercial Preparation ◽  
Assisted Extraction ◽  
Ultrasound Assisted

The ultrasound-assisted extraction of Juglans nigra L. leaves was optimized with respect to total phenolic content (TP) of the extracts by varying the concentration of aqueous ethanol solution (E) and different solvent-to-solid ratio (S). The influence and optimum of the operating parameters (E and S) was examined using response surface methodology (RSM). The statistical criteria indicated the adequacy, reliability and precision of the developed RSM model. RSM showed that maximum extraction yield of TP 28.59 mg g-1 of draw plant was achieved at the optimal values of 50% E and 20 kg kg-1 S. Using the modelled optimized conditions, the detected relative difference between the predicted and the experimental yield was ?2.3 %. The determined TP content in the extracts varied from 12.54 to 29.26 mg GAE g-1 of dry plant indicated that J. nigra is a valuable source of phenolic substances. The extracts of J. nigra leaves obtained under optimal conditions showed good antioxidant activity (IC50 = 18.91?0.03 ?g cm-3) which was determined by the scavenging effect on 2,2-diphenyl-1-picrylhydrazyl radical. The optimization of the TP extraction process is the important step in improving techno-economics of the potential commercial preparation of J. nigra extracts, as natural source of antioxidants.

scholarly journals Mathematical Modelling of Ultrasound-Assisted Extraction Kinetics of Bioactive Compounds from Artichoke By-Products

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 931
Author(s):  
Cristina Reche ◽  
Carmen Rosselló ◽  
Mónica M. Umaña ◽  
Valeria Eim ◽  
Susana Simal
Keyword(s):  
Power Density ◽  
Bioactive Compounds ◽  
Extraction Yield ◽  
Total Phenolic ◽  
Model Parameters ◽  
Ultrasound Assisted Extraction ◽  
Yield Curves ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Ultrasound Power

Valorization of an artichoke by-product, rich in bioactive compounds, by ultrasound-assisted extraction, is proposed. The extraction yield curves of total phenolic content (TPC) and chlorogenic acid content (CAC) in 20% ethanol (v/v) with agitation (100 rpm) and ultrasound (200 and 335 W/L) were determined at 25, 40, and 60 °C. A mathematical model considering simultaneous diffusion and convection is proposed to simulate the extraction curves and to quantify both temperature and ultrasound power density effects in terms of the model parameters variation. The effective diffusion coefficient exhibited temperature dependence (72% increase for TPC from 25 °C to 60 °C), whereas the external mass transfer coefficient and the equilibrium extraction yield depended on both temperature (72% and 90% increases for TPC from 25 to 60 °C) and ultrasound power density (26 and 51% increases for TPC from 0 (agitation) to 335 W/L). The model allowed the accurate curves simulation, the average mean relative error being 5.3 ± 2.6%. Thus, the need of considering two resistances in series to satisfactorily simulate the extraction yield curves could be related to the diffusion of the bioactive compound from inside the vegetable cells toward the intercellular volume and from there, to the liquid phase.

scholarly journals Ultrasound-assisted extraction of bayberry tannin and optimization using response surface methodology

BioResources ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. 1825-1841
Author(s):  
Mengqi Dong ◽  
Yufan Hu ◽  
Huijun Zhang ◽  
Xinyuan Lan ◽  
Xiaolu Ran ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Condensed Tannin ◽  
Gel Permeation Chromatography ◽  
Extraction Yield ◽  
Total Phenolic ◽  
Solvent Ratio ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted

The extraction of bayberry tannins has potential to maximize the utilization of a forest waste. This study employed a four-level central composite design through response surface methodology to optimize the extraction of tannin from bayberry barks through ultrasound-assisted extraction (UAE). The effects of solute to solvent ratio (STSR), solvent concentration (SC), extraction time (ET), and sonication temperature (ST) on the total extraction yield of total condensed tannin (TCT yield) and total phenolic content (TPC) were investigated. The extracts were characterized with matrix-assisted laser desorption-time of flight mass spectrometer (MALDI-TOF MS), nuclear magnetic resonance (NMR), and gel permeation chromatography (GPC). The optimized condition was reached when the STSR and ST were set at 1:57.16 g/mL and 71.3%, when the ET and the ST was 39.1 min and 48.75 °C. In these conditions, the TCT yield and TPC reached their maximum values of 17.55% and 365.01 mg GAE/g, respectively. Furthermore, the polyflavonoids of bayberry tannin ranged from dimers to heptamers, which were only composed of proanthocyanidins (PC) containing galloy groups.

scholarly journals Effect of frequency, temperature, and time of sonication on xanton content of mangosteen (Garcinia mangostana L.) peel extract through ultrasound assisted extraction

2019 ◽  
Vol 125 ◽  
pp. 25006 ◽  
Author(s):  
Suryono Suryono ◽  
Hadiyanto Hadiyanto ◽  
Moh. Yasin ◽  
Retno Widyowati ◽  
Muflihatul Muniroh ◽  
...  
Keyword(s):  
Extraction Process ◽  
Extraction Yield ◽  
Sonication Time ◽  
Ultrasound Assisted Extraction ◽  
Garcinia Mangostana ◽  
Mangosteen Peel ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Conventional Methods ◽  
Frequency Temperature

Ultrasound Assisted Extraction (UAE) has been used for the extraction of mangosteen peel (Garcinia mangostana L.) in producing xanton. Mangosteen peel extraction with UAE has been carried out to determine the effect of frequency, temperature, and time of sonication on the xanton content. The parameters controlled are frequency (20 - 40 kHz), temperature (25 - 35oC), and sonication time (20 - 40 minutes). The solvent used in the extraction was methanol with a ratio of mangosteen peel: solvent = 1: 10 and analysis of xanton content in the extraction. Extraction results showed that the content of xanthones from the extraction results of mangosteen (Gracinia mangostana L.) peel with UAE had optimum values at a frequency of 40 kHz, temperature of 35oC, and sonication time of 30 minutes. At the same frequency, temperature, and time, conventionally showed xanthones content of mangosteen rind extract of 93 ppm. The results show that the extraction yield using UAE is greater than that of conventional methods. From the results of this experiment, it can be concluded that the use of the UAE in the xanthones extraction process of mangosteen peel (Gracinia mangostana L.) is more optimal when compared to conventional methods.

scholarly journals Optimization of Ficus deltoidea Using Ultrasound-Assisted Extraction by Box-Behnken Statistical Design

2016 ◽  
Vol 02 ◽  
pp. 71 ◽  
Author(s):  
L. J. Ong ◽  
Awang Soh Mamat ◽  
Muhammad Shahzad Aslam ◽  
Muhammad Syarhabil Ahmad ◽  
◽  
...  
Keyword(s):  
Ethanol Concentration ◽  
Statistical Design ◽  
Extraction Yield ◽  
Total Phenolic ◽  
Sonication Time ◽  
Ultrasound Assisted Extraction ◽  
Ficus Deltoidea ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Sample Ratio

In this study, the effect of extraction parameters (ethanol concentration, sonication time, and solvent-to-sample ratio) onFicus deltoidealeaves was investigated using ultrasound-assisted extraction by response surface methodology (RSM). Total phenolic content (TPC) ofF. deltoideaextracts was identified using Folin-Ciocalteu method and expressed in gallic acid equivalent (GAE) per g. Box-Behnken statistical design (BBD) was the tool used to find the optimal conditions for maximum TPC. Besides, the extraction yield was measured and stated in percentage. The optimized TPC attained was 455.78 mg GAE/g at 64% ethanol concentration, 10 minutes sonication time, and 20 mL/g solvent-to-sample ratio whereas the greatest extraction yield was 33% with ethanol concentration of 70%, sonication time of 40 minutes, and solvent-to-material ratio at 40 mL/g. The determination coefficient,R2, for TPC indicates that 99.5% capriciousness in the response could be clarified by the ANOVA model and the value of 0.9681 of predictedR2is in equitable agreement with the 0.9890 of adjustedR2. The present study shows that ethanol water as solvent, a short time of 10 minutes, and adequate solvent-to-sample ratio (20 mL/g) are the best conditions for extraction.

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.

Research on Detecting Tris-(2,3-dibromopropyl)-Phosphate in Textiles with the HPLC/DAD Method

2012 ◽  
Vol 441 ◽  
pp. 640-644
Author(s):  
Ke Jie Fu ◽  
Li Sheng Yang ◽  
Chang Sheng Feng ◽  
Liang Chen
Keyword(s):  
Limit Of Detection ◽  
Extraction Process ◽  
Ultrasound Assisted Extraction ◽  
Routine Testing ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Pre Treatment ◽  
Finishing Agent ◽  
Detecting Method ◽  
Precision Test

A detecting method for toxic flame retardant finishing agent tris-(2,3-dibromopropyl) -phosphate (TRIS for short) in textiles was studied. In the method, an acetonitrile ultrasound-assisted extraction process was included in sample pre-treatment, and HPLC/DAD was used in the separation and identification of extractives. After that, the conditions of pre-treatment and chromatograph were optimized. The results showed that the limit of detection (LOD) by this method (S/N10) is 1.0 mg/kg, its recovery ranged from 78.1% to 98.4%, and RSD of the precision test is 3.2%, of which all met the requirements for routine testing.

scholarly journals Agro-industrial waste as a source of bioactive compounds: ultrasound-assisted extraction from blueberry (Vaccinium myrtillus) and raspberry (Rubus idaeus) pomace

2021 ◽  
Vol 43 ◽  
pp. e55564
Author(s):  
Suelen Siqueira dos Santos ◽  
Carolina Moser Paraíso ◽  
Letícia Misturini Rodrigues ◽  
Grasiele Scaramal Madrona
Keyword(s):  
Bioactive Compounds ◽  
Energy Efficient ◽  
Extraction Method ◽  
Rubus Idaeus ◽  
Total Phenolic ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Conventional Extraction ◽  
Gallic Acid Equivalent

Blueberry and raspberry pomace are a rich source of bioactive compounds that have not been commercially utilized yet, and ultrasound-assisted technology can efficiently extract these compounds. Also, the use of water as a solvent added to the ultrasound-assisted technology improves this eco-friendly process. Therefore, an aqueous eco-friendly extraction, including extraction time and ultrasound presence or absence (conventional extraction) was performed in order to extract bioactive compounds from blueberry and raspberry pomace. Response parameters included levels of anthocyanins, phenolic compounds, and flavonoids, and antioxidant activity determined by DPPH, ABTS, and FRAP methods. Analysis of variance results indicated that ultrasound-assisted extraction for 45 min. was feasible to extract the bioactive compounds. The antioxidant content of the extract obtained by the ultrasound-assisted process was 1.4 times higher on average and the total phenolic concentration was 1.6 times higher (for blueberry 5.02 and for raspberry 2.53 mg gallic acid equivalent/g) compared with those obtained by the conventional process. Thus, the ultrasound-assisted extraction method can be a profitable alternative to extract bioactive compounds from blueberry and raspberry pomace, as it is energy efficient, requires fewer chemicals, and produces less effluent. This eco-friendly technology is therefore viable for food, nutraceutical, and cosmetic industries, and also for reducing food waste.

scholarly journals Extraction of Anthocyanins and Total Phenolic Compounds from Açai (Euterpe oleracea Mart.) Using an Experimental Design Methodology. Part 2: Ultrasound-Assisted Extraction

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 326 ◽  
Author(s):  
María José Aliaño-González ◽  
Estrella Espada-Bellido ◽  
Marta Ferreiro-González ◽  
Ceferino Carrera ◽  
Miguel Palma ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Bioactive Compounds ◽  
Total Phenolic ◽  
Solvent Ratio ◽  
Total Phenolic Compounds ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Relative Standard ◽  
Ultrasound Assisted ◽  
Optimized Conditions

Two optimized methods for ultrasound-assisted extraction were evaluated for the extraction of two types of acai bioactive compounds: Total anthocyanins (TAs) and total phenolic compounds (TPCs). For the extraction optimization, a Box Behnken factorial design of different variables in the following intervals was used: Methanol-water (25%–75%) for solvent composition, temperatures between 10 and 70 °C, amplitude in the range between 30% and 70% of the maximum amplitude −200 W), extraction solvent pH (2–7), the ratio for sample-solvent (0.5 g:10 mL–0.5 g:20 mL), and cycle between 0.2 and 0.7 s. The extraction kinetics were studied using different periods between 5 and 30 min. TA and TPC were analyzed by UHPLC and the Folin–Ciocalteu method, respectively. Optimized conditions for TA were: 51% MeOH in water, 31 °C temperature, pH 6.38, cycle 0.7 s, 65% amplitude, and 0.5 g:10 mL of sample-solvent ratio. Optimized conditions for the TPC were: 49% MeOH in water, 41 °C temperature, pH 6.98, cycle 0.2 s, 30% amplitude, and 0.5 g:10 mL of sample-solvent ratio. Both methods presented a relative standard deviation below 5% in the precision study. The suitability of the methods was tested in real samples. It was confirmed that these methods are feasible for the extraction of the studied bioactive compounds from different açai matrices.

scholarly journals Antioxidant Capacity and Antigenotoxic Effect of Hibiscus sabdariffa L. Extracts Obtained with Ultrasound-Assisted Extraction Process

2020 ◽  
Vol 10 (2) ◽  
pp. 560
Author(s):  
Gregorio Iván Peredo Pozos ◽  
Mario Alberto Ruiz-López ◽  
Juan Francisco Zamora Nátera ◽  
Carlos Álvarez Moya ◽  
Lucia Barrientos Ramírez ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Human Lymphocytes ◽  
Dry Weight ◽  
Extraction Process ◽  
Hibiscus Sabdariffa ◽  
Ultrasound Assisted Extraction ◽  
Solid Ratio ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Antigenotoxic Effect

Hibiscus sabdariffa (Roselle) is in high demand worldwide due to its beneficial health properties owing to the polyphenols content, mainly in the flower calyx. The objective of this study was to find the best conditions (time and liquid: solid ratio) to extract polyphenols from Roselle using Ultrasound-Assisted Extraction (UAE) (40 kHz, 180 W), with ethanol how solvent; as well as determine the yield of phenols, anthocyanin, flavonoids, tannins, antioxidant activity (DPPH) and antigenotoxic effect (comet assay). A traditional solid-liquid extraction was applied as a reference. Extraction times of 40 and 60 min resulted in the highest polyphenols (13.019 mg GAE/g dry weight (dw)), flavonoids (4.981 CE/g dw), anthocyanins (1.855 mg Cya3GE/g dw), and tannins (0.745 CE/g dw) recoveries and an antioxidant activity (DPPH) of 74.58%. Extracts from white calyces contained similar amounts of phenols and flavonoids, but very little condensed tannins (0.049 CE/g dw) and practically no anthocyanins. Extracts from red and white calyces, showed antigenotoxic activity and repaired capacity of damage caused by mutagens in human lymphocytes.

scholarly journals Technology and Process Design for Phenols Recovery from Industrial Chicory (Chicorium intybus) Leftovers

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2681 ◽  
Author(s):  
Camilla Maria Cova ◽  
Luisa Boffa ◽  
Marco Pistocchi ◽  
Silver Giorgini ◽  
Rafael Luque ◽  
...  
Keyword(s):  
Extraction Process ◽  
Ethanol Solution ◽  
Ultrasound Assisted Extraction ◽  
Mineral Salts ◽  
Primary And Secondary Metabolites ◽  
Assisted Extraction ◽  
Honestly Significant Difference ◽  
Significant Difference ◽  
Tukey Honestly Significant Difference ◽  
Post Hoc

Vegetal leftovers from the agro–food industry represent a huge source of primary and secondary metabolites, vitamin, mineral salts and soluble as well as insoluble fibers. Economic reports on the growth in the polyphenol market have driven us to focus our investigation on chicory (Chicorium intybus L.), which is one of the most popular horticultural plants in the world and a rich source of phenolic compounds. Ultrasound-assisted extraction (UAE), microwave-assisted extraction (MAE) and their simultaneous combination, using either ethanol/water or water alone (also sub-critical), have been investigated with the aim of designing a green and efficient extraction process. Higher total-polyphenol yields as well as dramatic reductions in extraction times and solvent consumption have been obtained under these conditions. ANOVA test for analyses of variance followed by the Tukey honestly significant difference (HSD) post-hoc test of multiple comparisons was used in the statistical analysis. MAE experiments performed with sub-critical water, and MW/US experiments with an ethanol solution have shown polyphenol recovery values of up to ~3 g of gallic acid equivalents (GAE) per kg of fresh material in only 15 min, while conventional extraction required 240 min to obtain the same result.

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