Antioxidant activity and subcritical water extraction of anthocyanin from raspberry process optimization by response surface methodology

2021 ◽  
pp. 101394
Author(s):  
Yuwei Wang ◽  
Ying Ye ◽  
Le Wang ◽  
Wei Yin ◽  
Jian Liang
Keyword(s):  
Antioxidant Activity ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Process Optimization ◽  
Subcritical Water ◽  
Water Extraction ◽  
Subcritical Water Extraction

scholarly journals Subcritical Water Extraction of Chlorella pyrenoidosa: Optimization through Response Surface Methodology

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Selvakumar Thiruvenkadam ◽  
Shamsul Izhar ◽  
Yoshida Hiroyuki ◽  
Razif Harun
Keyword(s):  
Response Surface Methodology ◽  
Reaction Time ◽  
Response Surface ◽  
Reaction Temperature ◽  
Subcritical Water ◽  
Chlorella Pyrenoidosa ◽  
Water Extraction ◽  
Biofuel Production ◽  
Oil Yield ◽  
Subcritical Water Extraction

Subcritical water extraction (SCW) was used to extract oil from Chlorella pyrenoidosa. The operational factors such as reaction temperature, reaction time, and biomass loading influence the oil yield during the extraction process. In this study, response surface methodology was employed to identify the desired extraction conditions for maximum oil yield. Experiments were carried out in batch reactors as per central composite design with three independent factors including reaction temperature (170, 220, 270, 320, and 370°C), reaction time (1, 5, 10, 15, and 20 min), and biomass loading (1, 3, 5, 10, and 15%). A maximum oil yield of 12.89 wt.% was obtained at 320°C and 15 min, with 3% biomass loading. Sequential model tests showed the good fit of experimental data to the second-order quadratic model. This study opens the great potential of SCW to extract algal oil for use in algal biofuel production.

scholarly journals Subcritical Water Extraction of Epigallocatechin Gallate from Camellia sinensis and Optimization Study Using Response Surface Methodology

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1028
Author(s):  
Nguyen Tuan Hiep ◽  
Hoang Thanh Duong ◽  
Dang Tuan Anh ◽  
Nguyen Hoai Nguyen ◽  
Do Quang Thai ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Green Tea ◽  
Camellia Sinensis ◽  
Subcritical Water ◽  
Epigallocatechin Gallate ◽  
Water Extraction ◽  
Fast Method ◽  
Subcritical Water Extraction ◽  
Extraction Processes

Background: Camellia sinensis is a plant whose leaves and buds are used to produce tea. With many medicinal activities already found, green tea has been consumed widely in the world. Methods: The subcritical water extraction (SWE) of epigallocatechin gallate (EGCG) from green tea leaves and the effect of the different extraction conditions are investigated by response surface methodology (RSM). Furthermore, the model of the extraction processes is reviewed for application at the industrial scale. Results: Based on the RSM data, the maximum yield of extraction is determined via optimizing different parameters of the extraction processes. Optimal conditions are as follows: extraction time of 6 min, extraction temperature at 120 °C, and a sample/solvent ratio of 1:40 g/mL. Under such conditions, the best yield of EGCG is 4.665%. Moreover, the model of the extraction processes, which can be utilized for industry scale purpose, indicates a good correlation with the experimental data. Conclusions: Overall, SWE is competent and environmental-friendly, and it is also a highly selective and fast method. SWE is a promising method to take the place of organic solvents used in the extraction of weak polar and even non-polar natural compounds. Further studies on the scale-up of the extraction processes are ongoing.

Optimization of subcritical water extraction of antioxidants from Coriandrum sativum seeds by response surface methodology

2014 ◽  
Vol 95 ◽  
pp. 560-566 ◽  
Author(s):  
Zoran Zeković ◽  
Senka Vidović ◽  
Jelena Vladić ◽  
Robert Radosavljević ◽  
Aleksandra Cvejin ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Subcritical Water ◽  
Coriandrum Sativum ◽  
Water Extraction ◽  
Subcritical Water Extraction
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