scholarly journals Optimization of Microwave-Assisted Green Method for Enhanced Solubilization of Water-Soluble Curcuminoids Prepared Using Steviol Glycosides

Foods ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2803
Author(s):  
Jin-A Ko ◽  
Young-Bae Ryu ◽  
Woo-Song Lee ◽  
Kashif Ameer ◽  
Young-Min Kim
Keyword(s):  
Microwave Power ◽  
Water Solubility ◽  
Cost Effective ◽  
Water Soluble ◽  
Steviol Glycosides ◽  
Green Method ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Wide Scale ◽  
Independent Process

In this study, the optimization and modeling of microwave-assisted extraction (MAE) of water-soluble curcuminoids prepared using novel steviol glycosides (SGs) was carried out using four independent process variables at varying levels—X1: microwave power (50–200 W), X2: stevioside concentration (50–200 mg/mL), X3: curcumin concentration (20–200 mg/mL), and X4: time (1–10 min)—in response surface methodology configuration. Moreover, the effects of stevioside, as the most cost-effective natural solubilizer, were also evaluated. The water solubility of curcuminoids increased from 11 to 1320 mg/L with the addition of stevioside as a natural solubilizer. Moreover, microwave heating synergistically with stevioside addition significantly (p < 0.05) increased the solubility up to 5400 mg/L. Based on the results, the optimum conditions providing the maximum solubilization of 16,700 mg/L were 189 W microwave power, 195 g/L stevioside concentration, 183 g/L curcuminoid concentration, and 9 min of incubation time. Moreover, MAE of curcuminoids using SGs might render a significant advantage for its wide-scale application to solubilizing the multitude of insoluble functional flavonoids in fruits, plants, and food materials.

scholarly journals Microwave-assisted extraction of non-polar compounds from pistachio hull and characterization of extracts

2018 ◽  
Vol 69 (3) ◽  
pp. 260 ◽  
Author(s):  
H. N. Özbek ◽  
D. Koçak Yanık ◽  
S. Fadıloğlu ◽  
H. Keskin Çavdar ◽  
F. Göğüş
Keyword(s):  
Microwave Power ◽  
Polar Compounds ◽  
Good Alternative ◽  
Tocopherol Content ◽  
Extraction Time ◽  
Total Phenolic ◽  
Microwave Assisted Extraction ◽  
Solid Ratio ◽  
Microwave Assisted ◽  
Assisted Extraction

Soxhlet and microwave assisted extraction (MAE) methods were used to obtain non-polar compounds from pistachio hull. MAE parameters (liquid to solid ratio, microwave power, and extraction time) were studied to obtain maximum extraction yield. The optimal conditions were found to be liquid to solid ratio of 15:1 (v/w), microwave power of 250 W and extraction time of 12.5 min. The extraction yields were 9.81 and 9.50% for MAE and Soxhlet methods, respectively. The total phenolic content, antioxidant activity and tocopherol content of the extract obtained by MAE was found to be significantly higher than those of the Soxhlet extract (p < 0.05). The results showed that the extract contained α-tocopherols (567.65 mg/kg) and oleic acid (48.46%) as the major tocopherols and fatty acids. These findings propose that hull extracts can be considered as a good source of natural bioactive compounds and MAE can be a good alternative to the traditional Soxhlet method.

scholarly journals Effects of Microwave-Assisted Extraction Conditions on Antioxidant Capacity of Sweet Tea (Lithocarpus polystachyus Rehd.)

Antioxidants ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 678
Author(s):  
Ao Shang ◽  
Min Luo ◽  
Ren-You Gan ◽  
Xiao-Yu Xu ◽  
Yu Xia ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Microwave Power ◽  
Ethanol Concentration ◽  
Extraction Time ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Optimal Conditions ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Sample Ratio

In this study, the effects of microwave-assisted extraction conditions on antioxidant capacity of sweet tea (Lithocarpus polystachyus Rehd.) were studied and the antioxidants in the extract were identified. The influences of ethanol concentration, solvent-to-sample ratio, microwave power, extraction temperature and extraction time on Trolox equivalent antioxidant capacity (TEAC) value, ferric reducing antioxidant power (FRAP) value and total phenolic content (TPC) were investigated by single-factor experiments. The response surface methodology (RSM) was used to study the interaction of three parameters which had significant influences on antioxidant capacity including ethanol concentration, solvent-to-sample ratio and extraction time. The optimal conditions for the extraction of antioxidants from sweet tea were found as follows—ethanol concentration of 58.43% (v/v), solvent-to-sample ratio of 35.39:1 mL/g, extraction time of 25.26 min, extraction temperature of 50 ℃ and microwave power of 600 W. The FRAP, TEAC and TPC values of the extract under the optimal conditions were 381.29 ± 4.42 μM Fe(II)/g dry weight (DW), 613.11 ± 9.32 μM Trolox/g DW and 135.94 ± 0.52 mg gallic acid equivalent (GAE)/g DW, respectively. In addition, the major antioxidant components in the extract were detected by high-performance liquid chromatography with diode array detection (HPLC-DAD), including phlorizin, phloretin and trilobatin. The crude extract could be used as food additives or developed into functional food for the prevention and management of oxidative stress-related diseases.

Optimization of Microwave-Assisted Extracting of Proanthocyanidins from Purple Cabbage and Evaluation of Antioxidant Activity In Vitro

2012 ◽  
Vol 490-495 ◽  
pp. 3500-3504 ◽  
Author(s):  
Song Lin Li ◽  
Xiao Ming Chen ◽  
Jing Lin
Keyword(s):  
Microwave Power ◽  
Extraction Time ◽  
Power Extraction ◽  
Solid Ratio ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Layer Chromatography ◽  
Optimum Extraction ◽  
Central Composite

A central composite rotatable design combined with response surface methodology was employed to study the effect of microwave assisted extraction (MAE) conditions namely microwave power, extraction time, liquid-solid ratio and ethanol proportion on the proanthocyanidins extraction from purple cabbage. The optimum extraction conditions were as follows: microwave power, 260 W; extraction time, 54s; liquid to solid ratio, 43; and ethanol concentration, 57%. The results showed proanthocyanidins had a significant effect on scavenging of DPPH radicals. At last, proanthocyanidins were identified by thin layer chromatography.

scholarly journals EKSTRAKSI TANIN DARI KULIT KAYU AKASIA DENGAN MENGGUNAKAN MICROWAVE: PENGARUH DAYA MICROWAVE, WAKTU EKSTRAKSI DAN JENIS PELARUT

2017 ◽  
Vol 6 (3) ◽  
pp. 52-57
Author(s):  
Iriany ◽  
Florentina Pandiangan ◽  
Christina Eka P
Keyword(s):  
Atomic Absorption ◽  
Adsorption Capacity ◽  
Microwave Power ◽  
Polar Solvent ◽  
Extraction Time ◽  
Solvent Ratio ◽  
Microwave Assisted Extraction ◽  
Power Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

Tannin is one of complex polyphenol compound which soluble in polar solvent. Tannin could be extracted from acacia bark. This study aims to examine microwave-assisted extraction of tannins under influence of microwave power, extraction time, and solvent and its application to adsorb Cd and Cu. Tannin was extracted from acacia bark with feed-to-solvent ratio (1:20 g/ml). Power of microwave was adjusted 100 W, 180 W, 300 W, 450 W, and 600 W for 1 minute, 3 minutes and 5 minutes respectively using aquadest and ethanol as the solvent. The extracts were analyzed using UV-Vis spectrophotometer. Furthermore, the extract with the highest yield of tannins are used as the adsorbent. The concentration of Cd and cu were analyzed using Atomic Absorption Spectrophotometer. The result showed the highest yield of tannin 26.606 mg/g at 100 W and 3 minutes extraction time using ethanol as the solvent. The result showed that the adsorption capacity of adsorbent from tannin was 3.81 mg/g and 2.26 mg/g for Cd and Cu respectively.

Microwave-Assisted Extraction and In Vitro Antioxidant Evaluation of Polysaccharides from Enteromorpha prolifera

2011 ◽  
Vol 79 ◽  
pp. 204-209 ◽  
Author(s):  
Bin Wang ◽  
Guo Zhong Tong ◽  
You Le Qu ◽  
Li Li
Keyword(s):  
Microwave Power ◽  
Radical Scavenging ◽  
Hot Water ◽  
Butylated Hydroxytoluene ◽  
Extraction Time ◽  
Microwave Assisted Extraction ◽  
Enteromorpha Prolifera ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Liquid Material

An efficient microwave-assisted extraction (MAE) technique was developed to extract polysaccharides from Enteromorpha prolifera (PEP). The operating parameters, such as microwave power, liquid/material ratio, temperature and extraction time, were optimized using orthogonal array design coupled with single factor method. PEP yield was determined by the phenol-sulfuric acid method. The optimum extraction conditions were determined as follows: microwave power, 700 W; liquid/material ratio, 40:1 (mL/g); temperature, 70 °C; and extraction time, 25 min. Under such conditions, PEP yield reached to 10.79 %. In comparison with conventional hot water extraction and ultrasonic-assisted extraction, MAE showed obvious advantages in terms of high extraction efficiency, saving energy, rapidity, solvent consumption, and so on. The data demonstrated that MAE could be a fast and reliable method for quantitative analysis of PEP. The scavenging capability of PEP to DPPH/hydroxyl radical reached to 65.2 % and 41.2 % at the concentration of 0.5 mg/mL. The reducing power of PEP was 0.354. Compared with butylated hydroxytoluene (BHT) and gallic acid (GA), the experimental results showed that DPPH radical scavenging activity of PEP was higher than that of BHT. Thus, PEP had good potential as a natural antioxidant used in functional food or medicine industries.

scholarly journals Influences of Microwave-Assisted Extraction Parameters on Antioxidant Activity of the Extract from Akebia trifoliata Peels

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1432
Author(s):  
Min Luo ◽  
Dan-Dan Zhou ◽  
Ao Shang ◽  
Ren-You Gan ◽  
Hua-Bin Li
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Microwave Power ◽  
Ethanol Concentration ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Extraction Parameters

Akebia trifoliata is a fruit with rich nutritional properties, and its peel is produced as a by-product. In this research, we investigated the influences of microwave-assisted extraction parameters on antioxidant activity of the extract from Akebia trifoliata peels, and the ferric-reducing antioxidant power (FRAP) and Trolox equivalent antioxidant capacity (TEAC) as well as total phenolic contents (TPC) were used to optimize extraction parameters. The influences of ethanol concentration, microwave power and solvent-to-material ratio, as well as extraction temperature and time on TPC, FRAP and TEAC values, were assessed using single-factor tests. Three parameters with obvious effects on antioxidant capacity were selected to further investigate their interactions by response surface methodology. The optimal extraction parameters of natural antioxidants from Akebia trifoliata peels were ethanol concentration, 49.61% (v/v); solvent-to-material ratio, 32.59:1 mL/g; extraction time, 39.31 min; microwave power, 500 W; and extraction temperature, 50 °C. Under optimal conditions, the FRAP, TEAC and TPC values of Akebia trifoliata peel extracts were 351.86 ± 9.47 µM Fe(II)/g dry weight (DW), 191.12 ± 3.53 µM Trolox/g DW and 32.67 ± 0.90 mg gallic acid equivalent (GAE)/g DW, respectively. Furthermore, the main bioactive compounds (chlorogenic acid, rutin and ellagic acid) in the extract were determined by high-performance liquid chromatography. The results are useful for the full utilization of the by-product from Akebia trifoliate fruit.

scholarly journals Rapid Microwave-Assisted Extraction and HPTLC- Photodensitometric Method for the Quality Assessment of Boerhaavia diffusa L.

2011 ◽  
Vol 94 (3) ◽  
pp. 795-802 ◽  
Author(s):  
Shrinivas G Bhope ◽  
Vivek K Ghosh ◽  
Vinod V Kuber ◽  
Manohar J Patil
Keyword(s):  
Quality Assessment ◽  
Cost Effective ◽  
Extraction Methods ◽  
New Method ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Cost Effective Method ◽  
Optimized Conditions ◽  
Boerhaavia Diffusa

Abstract A rapid and cost-effective method for the extraction of rotenoids in Boerhaavia diffusa L., based on the use of microwave-assisted extraction (MAE), is proposed. The conventional reflux, soxhlet, and maceration extraction methods were also conducted to validate the reliability of the new method. Under the optimized conditions, two rotenoids (boeravinone B and E) were extracted and quantified by HPTLC. The yield of boeravinone B and E achieved by MAE was 0.15 and 0.32% (w/w), respectively. The result showed that MAE-HPTLC is a simple, rapid, and solvent-sparing method for the extraction and quantitation of boeravinone B and E from B. diffusa L.

Study on Microwave - Assisted Extraction of the Yellow Pigment from Orange Peel

2013 ◽  
Vol 295-298 ◽  
pp. 287-292 ◽  
Author(s):  
Xiu Hua Tang
Keyword(s):  
Microwave Power ◽  
Mass Concentration ◽  
Orthogonal Experiment ◽  
Orange Peel ◽  
Yellow Pigment ◽  
Process Conditions ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Microwave Time

The article is about extracting the yellow pigment from orange peel with the aid of microwave.It mainly studies the effect of concentration of ethanol,the ratio of material and solution,microwave time,microwave power on the extraction percent of yellow pigment .The Orthogonal experiment shows that the order of factors which influence the extraction rate are microwave time,microwave power and mass concentration of ethanol. The optimized process conditions are mass concentration of ethanol as 85%,the ratio of material and solution as 1:16g/mL,microwave time as 8 minutes,microwave power as 200W,the extraction percent of yellow pigment can be 8.59%.

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