Effect of processing parameters on the phenolic content of Clinacanthus nutans leaves extract using response surface methodology (RSM)

2019 ◽  
Author(s):  
Farah Nadiah Mohd Fazil ◽  
Nur Syarafina Mohd Azzimi ◽  
Saiful Irwan Zubairi
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Phenolic Content ◽  
Processing Parameters ◽  
Clinacanthus Nutans

EXTRACTION OPTIMIZATION AND ANTIOXIDANT ACTIVITY OF PHENOLIC COMPOUNDS FROM AVOCADO PEEL

2019 ◽  
pp. 49-59
Author(s):  
Nu Linh Giang Ton ◽  
Thi Hoai Nguyen ◽  
Quoc Hung Vo
Keyword(s):  
Antioxidant Activity ◽  
Response Surface Methodology ◽  
Antioxidant Capacity ◽  
Response Surface ◽  
Total Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Quadratic Model ◽  
Total Phenolic ◽  
Total Antioxidant

Avocado peel has been considered as a potential source of natural antioxidants in which phenolics are among the most important compounds. Therefore, this study aims to optimize the extraction process of phenolics using response surface methodology and evaluate the corresponding antioxidant activity. From the quadratic model, the optimal condition was determined including the ethanol concentration 54.55% (v/v), the solvent/solute ratio 71.82/1 (mL/g), temperature 53.03 oC and extraction time 99.09 min. The total phenolic content and the total antioxidant capacity at this condition with minor modifications were 26,74 ± 0,04 (mg GAE/g DW) and 188.06 ± 1.41 (mg AAE/g DW), respectively. The significant correlation between total phenolic content and total antioxidant capacity was also confirmed. Key words: response surface methodology, central composite rotatable design, total phenolic content, total antioxidant capacity, avocado peel

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‰).

scholarly journals Development of a Novel Whey Date Beverage Fermented with Kefir Grains Using Response Surface Methodology

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Sana M’hir ◽  
Kais Rtibi ◽  
Asma Mejri ◽  
Manel Ziadi ◽  
Hajer Aloui ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Process Conditions ◽  
Whey Permeate ◽  
Overall Acceptability ◽  
Date Syrup ◽  
Kefir Grains

The aim of this study was to develop a novel kefir beverage using date syrup, whey permeate, and whey. The levels of the kefir grain inoculum (2–5% w/v), fruit syrup (10–50% w/v), and whey permeate (0–5% w/v) on pH, total phenolic content, antioxidant activity, lactic acid bacteria and yeast counts, and overall acceptability were investigated using central composite design. The use of response surface methodology allowed us to obtain a formulation with acceptable organoleptic properties and high antioxidant activities. The obtained beverages had total phenolic content, % DPPH scavenging activity, and overall acceptability ranging from 24 to 74 mg GAE/mL, from 74.80 to 91.37 mg GAE/mL, and from 3.50 to 6 mg GAE/mL (based on a 1 to 9 preference scale), respectively. Date syrup of 36.76% (w/v), whey permeates of 2.99%, and kefir grains inoculum size of 2.08% were the optimized process conditions achieved.

Determination of optimal extraction conditions for phenolic compounds from Pistacia atlantica leaves using the response surface methodology

2016 ◽  
Vol 8 (31) ◽  
pp. 6107-6114 ◽  
Author(s):  
Ziyad Ben Ahmed ◽  
Mohamed Yousfi ◽  
Johan Viaene ◽  
Bieke Dejaegher ◽  
Kristiaan Demeyer ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Phenolic Compounds ◽  
Response Surface ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Box Behnken Design ◽  
Pistacia Atlantica

Response surface methodology in combination with a Box–Behnken design was performed to optimize the extraction conditions, resulting in a maximum total phenolic content yield from Pistacia atlantica leaves.

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