scholarly journals Sequential Combination of Microwave- and Ultrasound-Assisted Extraction of Total Flavonoids from Osmanthus fragrans Lour. Flowers

Molecules ◽  
2017 ◽  
Vol 22 (12) ◽  
pp. 2216 ◽  
Author(s):  
Jianfeng Yu ◽  
Qi Lou ◽  
Xiangyang Zheng ◽  
Zhengwei Cui ◽  
Jian Fu
Keyword(s):  
Total Flavonoids ◽  
Ultrasound Assisted Extraction ◽  
Osmanthus Fragrans ◽  
Assisted Extraction ◽  
Sequential Combination ◽  
Ultrasound Assisted

scholarly journals Ultrasound-Assisted Extraction of Total Flavonoids from Corn Silk and Their Antioxidant Activity

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Ling-Li Zheng ◽  
Guan Wen ◽  
Min-Yong Yuan ◽  
Feng Gao
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Antioxidant Activities ◽  
Total Flavonoids ◽  
Ultrasonic Power ◽  
Ultrasound Assisted Extraction ◽  
Antioxidant Power ◽  
Corn Silk ◽  
Assisted Extraction ◽  
Ultrasound Assisted

Object. Ultrasound-assisted extraction of total flavonoids from corn silk and their antioxidant activities were studied.Methods. Response surface methodology was adopted to optimize the extraction conditions and antioxidant activities of the extracted total flavonoids were detected through ferric reducing antioxidant power (FRAP) assay.Results. Through a three-level, three-variable Box-Behnken design of response surface methodology (RSM) adopting yield as response, the optimal conditions were determined as follows: ultrasonic power 500 W, extraction time 20 min, material solvent ratio 1 : 20, and ethanol concentration 30%. Under the optimum conditions, the extraction yield of total flavonoids was 1.13%. FRAP value of total flavonoids extracted from corn silk was 467.59 μmol/L.Conclusion. The total flavonoids of corn silk could be developed as food natural antioxidant reagents.

scholarly journals Optimization of Ultrasound-Assisted Extraction Using Response Surface Methodology for Simultaneous Quantitation of Six Flavonoids in Flos Sophorae Immaturus and Antioxidant Activity

Molecules ◽  
2020 ◽  
Vol 25 (8) ◽  
pp. 1767 ◽  
Author(s):  
Sanhong Fan ◽  
Gege Yang ◽  
Jinhua Zhang ◽  
Jiani Li ◽  
Baoqing Bai
Keyword(s):  
Response Surface Methodology ◽  
Free Radicals ◽  
Response Surface ◽  
Comprehensive Evaluation ◽  
Antioxidant Activities ◽  
Total Flavonoids ◽  
Ultrasound Assisted Extraction ◽  
Antioxidant Power ◽  
Assisted Extraction ◽  
Ultrasound Assisted

Ultrasound-assisted extraction (UAE) was applied to extract rutin (RU), nicotiflorin (NI), narcissoside (NA), kaempferol (KA), isorhamnetin (IS), quercetin (QU), and total flavonoids of Flos Sophorae Immaturus (TFFSI) from Flos Sophorae Immaturus (FSI). Through single factor test and response surface methodology (RSM), the optimal extraction conditions were concluded as follows: ethanol concentration 70%, time 30 min, temperature 61 °C, and liquid/solid ratio 15.30 mL/g, respectively. The actual extraction rates of RU, NI, NA, KA, IS, QU, and TFFSI were 14.6101%, 2.9310%, 7.1987%, 0.1041%, 0.4920%, 2.7998%, and 26.4260%, respectively. The experimental results demonstrated that the extraction method with accuracy and efficiency could be used for the comprehensive evaluation quality control of extracts from FSI. The antioxidant activities of hydroalcoholic extraction from FSI on 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS•+), superoxide anion (•O2−) free radicals, and ferric reducing/antioxidant power (FRAP) were assessed. The results showed that the antioxidation activities of extracts on DPPH, ABTS•+, and •O2− free radicals were reached 89.29%, 97.86%, and 56.61%, and 81.4% in FRAP at 1.0 mg/mL, respectively. The antioxidant capacity of FSI extract was positively correlated with the amount of total flavonoids.

Antioxidant Activity of Sorbus sibirica Fruit Extracts

2014 ◽  
Vol 900 ◽  
pp. 267-274 ◽  
Author(s):  
Jie Wei ◽  
Jia Shi ◽  
Jun Gao ◽  
Zhi Quan Zhou ◽  
Jun Gang Fan
Keyword(s):  
Lipid Peroxidation ◽  
Antioxidant Activity ◽  
Free Radicals ◽  
Superoxide Anion ◽  
Reducing Power ◽  
In Vitro Assays ◽  
Total Flavonoids ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted

Sorbus sibirica fruits, popularly consumed as tea, is believed to promote healthy, relieve a cough. The literature reporting pharmacological studies related to Sorbus sibirica is very limited. Thus, The antioxidant activities of extracts from Sorbus sibirica fruits were evaluated using various in vitro assays including total flavonoid contents, total antioxidant activity, reducing power, lipid peroxidation inhibitory activity, scavenging hydroxyl and superoxide anion free radicals activity, and protective effects against DNA and protein damages. We selected the process of ultrasound-assisted extraction for total flavonoids from Sorbus sibirica fruits according to the extraction rate of total flavonoids. Results showed that the content of total flavonoids was 0.82 g per 100 g dry fruits sample obtained with ultrasound-assisted extraction method. The extracts exhibited strong scavenging capability with respect to hydroxyl and superoxide anion free radicals, and effectively inhibited the lipid peroxidation of polyunsaturated fatty acids. They also had good reducing power and protection against DNA and protein damage. Therefore, they might offer an important source of effective natural antioxidants in the food and cosmetic industries.

scholarly journals Ultrasound-assisted extraction of total flavonoids from Inula helenium

2012 ◽  
Vol 8 (30) ◽  
pp. 166 ◽  
Author(s):  
Dan-Shen Zhang ◽  
Jin Wang ◽  
Chun-Yan Guo ◽  
Shao-Meng Zhang ◽  
Chun-Lei Liu ◽  
...  
Keyword(s):  
Total Flavonoids ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Inula Helenium ◽  
Ultrasound Assisted

scholarly journals Optimization of Ultrasound-Assisted Extraction of Total Flavonoids from Dendranthema indicum var. aromaticum by Response Surface Methodology

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Lijie Zhong ◽  
Yi Liu ◽  
Bin Xiong ◽  
Lin Chen ◽  
Yaohua Zhang ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Volume Ratio ◽  
Quadratic Model ◽  
Total Flavonoids ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Solid Liquid ◽  
Operating Method

Dendranthema indicum var. aromaticum is a new species with strong fragrance and is used as a herbal medicine by Chinese folks. The abundant flavonoids play important roles in its pharmacological activities. In this study, an ultrasound-assisted method was used to extract total flavonoids (TF) from D. indicum var. aromaticum by response surface methodology. A quadratic model was developed to optimize the extraction conditions, whose accuracy was verified by statistic analysis. Ethanol and acetic acid at the volume ratio of 70% : 2% were selected as the extract solvent. The optimized extraction conditions were as follows: extraction time, 40 min; solid/liquid ratio, 1 : 23 g/mL; and temperature, 60°C. This is the first report of an efficient and easy-operating method for TF extraction from D. indicum var. aromaticum. Besides, this study provides reference for future pharmacological research on D. indicum var. aromaticum and extraction of bioactive components from other herbs.

scholarly journals Ultrasound-assisted extraction of total flavonoids from Aconitum gymnandrum

2014 ◽  
Vol 10 (37) ◽  
pp. 141 ◽  
Author(s):  
Feng Gao ◽  
Ling-Li Zheng ◽  
Dan Wang ◽  
Yuan-Yuan Li ◽  
Hong-Yan Peng ◽  
...  
Keyword(s):  
Total Flavonoids ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted
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