scholarly journals Optimization of lipids’ ultrasonic extraction and production from Chlorella sp. using response-surface methodology

2018 ◽  
Vol 17 (1) ◽  
Author(s):  
Bilel Hadrich ◽  
Ismahen Akremi ◽  
Mouna Dammak ◽  
Mohamed Barkallah ◽  
Imen Fendri ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Ultrasonic Extraction ◽  
Chlorella Sp

Optimization of Ultrasonic Extraction of Polyphenol from Pinus Koraiensis Bark Using Response Surface Methodology

2011 ◽  
Vol 183-185 ◽  
pp. 1874-1878 ◽  
Author(s):  
Ji Chang Wang ◽  
Zhen Yu Wang ◽  
Zi Luan Fan ◽  
Li Li Zuo ◽  
Shuang Qi Tian ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Phenolic Compounds ◽  
Response Surface ◽  
Ethanol Concentration ◽  
Processing Parameters ◽  
Ultrasonic Extraction ◽  
Raw Material ◽  
Extraction Time ◽  
Pinus Koraiensis ◽  
Ultrasonic Power

Ultrasonic technology was applied for phenolic compounds extraction from the Pinus koraiensis bark （PKB） and response surface methodology (RSM) was used to optimize the effects of processing parameters on phenolic compounds yields. When ultrasonic power 160W,three independent variables were ultrasonic extraction time (X1 20-40min), ratio of water to raw material (X2 1:20-1:40 g/mL)and ethanol concentration(X3 20％-60％), respectively.The optimal extraction conditions of phenolic compounds were determined as follows: Ultrasonic extraction time 30.61 min, ratio of water to raw material 30.79 mL/g and ethanol concentration 42.2%. Under these conditions, the experimental yield of phenolic compounds was 8.2409 ± 0.0648‰, well matched with the predicted models with the coefficients of determination (R2) of 0.9920, which was agreed closely with the predicted value (8.2963‰).

Optimization of Ultrasonic Extraction of Phenolics from Litchi Seed by Response Surface Methodology

2012 ◽  
Vol 610-613 ◽  
pp. 3387-3393
Author(s):  
Xiao Bing Huang ◽  
Li Jing Lin ◽  
Ji Hua Li ◽  
Xu Ran ◽  
Yong Fu Tang
Keyword(s):  
Response Surface Methodology ◽  
Regression Model ◽  
Response Surface ◽  
Maximum Yield ◽  
Methanol Concentration ◽  
Ultrasonic Extraction ◽  
Extraction Time ◽  
Extraction Temperature ◽  
Quadratic Regression ◽  
Box Behnken Design

Optimization conditions for ultrasonic extraction of phenolics from litchi seed were studied using response surface methodology. A Box–Behnken design (BBD) was applied to determine the effects of extraction temperature, methanol concentration and extraction time on yield of phenolics. Then a quadratic regression model was developed and found to be statistically significant by examining its adequacy. According to the model, the maximum yield of phenolics was obtained at the theoretical extraction conditions described as follows: extraction temperature 90°C, methanol concentration 59% and extraction time 70 min. Under this condition, the experimental value was 5.48 ± 0.03% (n = 3) with gallic acid as the equivalent, which agreed with the predicted value (5.52%) closely.

Optimization of light and temperature for growing Chlorella sp. using response surface methodology

1996 ◽  
Vol 10 (5) ◽  
Author(s):  
J.L. Garc�a S�nchez ◽  
J.A. S�nchez P�rez ◽  
F. Garc�a Camacho ◽  
J.M. Fern�ndez Sevilla ◽  
E. Molina Grima
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Chlorella Sp

scholarly journals Optimization of Ultrasonic Extraction of Phenolic Antioxidants from Green Tea Using Response Surface Methodology

Molecules ◽  
2013 ◽  
Vol 18 (11) ◽  
pp. 13530-13545 ◽  
Author(s):  
Lan-Sook Lee ◽  
Namhyouck Lee ◽  
Young Kim ◽  
Chang-Ho Lee ◽  
Sang Hong ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Green Tea ◽  
Ultrasonic Extraction ◽  
Phenolic Antioxidants

Optimization of Ultrasonic Extraction of Flavonoids from Castanea mollissima Blume Shell

2015 ◽  
Vol 713-715 ◽  
pp. 2775-2778
Author(s):  
Hai Tao Sun ◽  
Xin Ru Shao ◽  
Rui Ping Jiang ◽  
Jun An
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Ethanol Concentration ◽  
Extraction Rate ◽  
Ultrasonic Extraction ◽  
Optimum Conditions ◽  
Ultrasonic Time ◽  
Castanea Mollissima ◽  
Ultrasonic Assisted

Flavonoids extracted fromCastanea mollissimaBlume shell using response surface methodology by ultrasonic-assisted. The effects of liquid/ materials ratio, ethanol concentration, ultrasonic temperature,and ultrasonic time on the flavonoids extraction rate were investigated by Box-Benhnken center composite design. The results showed that the optimum conditions were as follows: liquid/ materials ratio 8:1 (mL/g), ethanol concentration 40 %, ultrasonic temperature 60 °C,and ultrasonic time 25 min, the highest absorbance was obtained under the optimum conditions, and the extract absorbance can be reached 0.702.

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