scholarly journals Optimization of Ultrasonic-assisted Extraction Technology of Sargassum fusiforme Polysaccharides and Evaluation of Their Antioxidant Activity

2013 ◽  
Vol 19 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Caiyan LI ◽  
Caisheng WANG ◽  
Sufang WANG ◽  
Guoying QIAN ◽  
Qiuhua ZHU ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Extraction Technology ◽  
Sargassum Fusiforme ◽  
Assisted Extraction ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Extraction

scholarly journals Advance on the preparation, physiological function and nanocarriers of resveratrol

2021 ◽  
Vol 233 ◽  
pp. 02047
Author(s):  
Lingyi Li
Keyword(s):  
Research Direction ◽  
Antioxidant Property ◽  
Future Research ◽  
Extraction Technology ◽  
Hydrolysis Method ◽  
Assisted Extraction ◽  
Carbon Dioxide Extraction ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Extraction ◽  
Further Development

Resveratrol is a natural compound that has many beneficial physiological functions. In recent years, the research on resveratrol has gradually become a hotspot. This article summarized the literature reports all over the world, classified and concluded the extraction technology, function and nano-delivery carriers of resveratrol. Solvent extraction, microwave-and ultrasonic-assisted extraction, supercritical carbon dioxide extraction and enzymatic hydrolysis method were respectively discussed in detail. Then the antioxidant property, antibacterial activity, antiumor effect and the prevention of cardiovascular disease of resveratrol were also discussed. Finally, the resveratrol-loaded nanocarriers, such as nanoparticles, nanoemulsions, solid lipid particles and nanosuspensions were summarized. And the future research direction of resveratrol were prospected, in order to provide references and orientations for the further development and research of resveratrol.

scholarly journals Ultrasonic-assisted Extraction, Antioxidant Activity and Structural Characterization of Polysaccharides from Oenothera Biennis L. Leaves

2020 ◽  
Vol 189 ◽  
pp. 02025
Author(s):  
Zhou Yong Dong ◽  
Xin Song Yin ◽  
Shu Lin Liu ◽  
Tie Hua Zhang ◽  
Hui Ren ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Average Molecular Weight ◽  
Reducing Power ◽  
Ultrasonic Power ◽  
Oenothera Biennis ◽  
Scavenging Effect ◽  
Assisted Extraction ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Extraction

This paper studies the optimization of ultrasonic-assisted extraction of polysaccharides from Oenothera biennis L. leaves using Box-Behnken design, and their in vitro antioxidant activity and structure. It is demonstrated that the optimum extraction conditions are: the ultrasonic power at 400 W, solvent-tosample ratio of 23:1 (mL/g), ultrasonication temperature at 53 °C, and time for 36 min, under which the yield of polysaccharides from Oenothera biennis L. leaves, namely 3.54%, remains close to the predicted value in the model. The assays of the scavenging effect on DPPH and hydroxyl free radicals, and of the reducing power indicate that polysaccharides from Oenothera biennis L. leaves possess strong antioxidant activity and certain relationship exists between their dose and effect in the concentration range of the experiment; Fourier IR spectroscopy reveals that characteristic absorption peak of polysaccharides can be seen from the sample; the DE-52 cellulose column chromatography, HPLC profiles, and GC-MS chromatogram identify the obtained OCP-2 as heteropolysaccharides, whose major components, including arabinose, mannose, galactose, and talose, have an average molecular weight of 5435 Da.

Studies on Ultrasonic Assisted Extraction Technology of Flavonoid from Orange Peel

2013 ◽  
Vol 815 ◽  
pp. 317-320 ◽  
Author(s):  
Li Jing Min ◽  
Min Xing Zhao
Keyword(s):  
Citrus Fruit ◽  
Orange Peel ◽  
Alcohol Concentration ◽  
Raw Material ◽  
Optimum Process ◽  
Process Conditions ◽  
Extraction Technology ◽  
Assisted Extraction ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Extraction

[ObjectivTo study the extraction technology of flavonoids from orange peel in order to provide some theoretical guidance for the industrial production of flavonoids from orange peel. [Metho Taking orange peel as raw material, which was citrus fruit processing waste and the flavonoid yield as index, with ultrasonic assisted extraction, through single factor experiments and orthogonal tests to optimization of the extraction technology, obtain optimum process conditions of orange flavonoid by ultrasonic assisted extraction. [Result As for ultrasonic assisted extraction, the yield of orange flavonoid reached 9.6% under extraction conditions of extracting time 30 min, alcohol concentration 60%, sedimentation ratio 1:25.

Optimization of Ultrasonic-Assisted Extraction of Total Saponins from Ophiopholis mirabilis Using Response Surface Methodology

2013 ◽  
Vol 781-784 ◽  
pp. 687-693
Author(s):  
Zhi Yang Shao ◽  
Jin Xia Fu ◽  
Yan Xia Qi ◽  
Qian Cheng Zhao ◽  
Zhi Bo Li
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Ethanol Concentration ◽  
Water Bath ◽  
Ultrasonic Power ◽  
Extraction Technology ◽  
Assisted Extraction ◽  
Ultrasonic Time ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Extraction

Ultrasonic-Assisted extraction (UAE) was applied for saponins extraction from Ophiopholis mirabilis and response surface methodology (RSM) was used to optimize the extraction technology. A first set of experiments were designed to optimize water bath temperature, ethanol concentration, the ratio of liquid to solid, ultrasonic time (min) and ultrasonic power (W) as the main variables affecting the extraction effect. A Box-Behnken design consisting of 15 experimental runs was then applied and a second-order polynomial model was used to explain the interactions between the main factors and the yield of saponins. The developed mathematical model was found to fit well with the experimental data and the optimized conditions were ultrasonic pretreatment time 30.9 min, ethanol concentration 64%, liquid /solid ratio 35:1, ultrasonic power 300W and water bath 70°C. Corresponding saponins content was 0.574%.

scholarly journals Antioxidant Activity of Extract from Ultrasonic-Assisted Extraction of Durian Peels

2018 ◽  
Vol 5 (2) ◽  
Author(s):  
Bambang Kunarto ◽  
Ely Yuniarti Sani
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolics ◽  
Extraction Process ◽  
Extraction Time ◽  
Total Flavonoids ◽  
Assisted Extraction ◽  
Ultrasonic Assisted ◽  
Total Flavonoids Content ◽  
Phenolics Content ◽  
Ultrasonic Assisted Extraction

The increase in durian production results in the accumulation of durian peel waste. The bioactive component of durian peel has the potential to be used as an antioxidant. Thus, there is a need to carry out an extraction process to obtain  bioactive compounds from durian peel. However, conventional extraction methods cause damage to phenolic compounds due to oxidation, hydrolysis and ionization reactions during the extraction process. Therefore, durian peel extraction was carried out using ultrasonic assisted extraction method (UAE) in this study. The purpose of this study was to investigate the effect of varying ratios of durian peel to ethanol solvents and extraction time on the yield, total phenolics content, total flavonoids content and antioxidant activity. The results of the research data were analyzed using a two-factor completely randomized design, which included variations of the ratio of durian peel to ethanol solvents and extraction time The Duncan’s New Multiple Range Test (DNMRT) was carried out as a follow up test to determine the differences in each treatment at a significance level of 0.05. The results showed that the best treatment for peel extraction using ultrasonic assisted extraction was a 1: 9 ratio of durian peel to ethanol at an extraction time of 20 minutes. The extraction of durian peel under this condition gave the highest yield of 12.77 ± 0.16%, antioxidant activity (IC50) of 38.33 ± 0.12 ppm, total phenolic content of 63.30 ± 0.08 mgGAE / g and total flavonoids content of 47.53 ± 0.48 mgQE / g. In addition, total phenolics content and total flavonoid content showed a strong correlation to the antioxidant activity of durian peel extract.

Ultrasonic-assisted extraction of pigments from Hylocereus undatus flowers: optimization, antioxidant activity, and HPLC analysis

RSC Advances ◽  
2015 ◽  
Vol 5 (58) ◽  
pp. 46598-46607 ◽  
Author(s):  
Yong Liu ◽  
Huifang Zhang ◽  
Shoulian Wei
Keyword(s):  
Antioxidant Activity ◽  
Hplc Analysis ◽  
Assisted Extraction ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Extraction ◽  
Hylocereus Undatus

Optimization extraction, antioxidant activity, and HPLC analysis of pigments fromHylocereus undatusflowers.

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