scholarly journals Determination of the Effects of Variables on Total Phenolic Content and Antioxidant Activity of Apple Ectracts by Response Surface Method

2020 ◽  
pp. 1014-1022
Author(s):  
Recep PALAMUTOĞLU ◽  
Cemal KASNAK
Keyword(s):  
Antioxidant Activity ◽  
Response Surface ◽  
Response Surface Method ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Surface Method

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

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.

Determination of Carotenoids, Total Phenolic Content, and Antioxidant Activity of Arazá (Eugenia stipitataMcVaugh), an Amazonian Fruit

2012 ◽  
Vol 60 (18) ◽  
pp. 4709-4717 ◽  
Author(s):  
G. Astrid Garzón ◽  
Carlos-Eduardo Narváez-Cuenca ◽  
Rachel E. Kopec ◽  
Andrew M. Barry ◽  
Kenneth M. Riedl ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic

scholarly journals Determination of phenolic contents and antioxidant activity test of ethanol extract of Sirih merah (Piper crocatum Ruiz & Pav.) leaves using the DPPH method

2021 ◽  
Vol 13 (2) ◽  
pp. 137-142
Author(s):  
Kasta Gurning ◽  
◽  
Sifikal Lumbangaol ◽  
Risanti F. R. Situmorang ◽  
Saronom Silaban ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Ethanolic Extract ◽  
Ethanol Extract ◽  
Extraction Process ◽  
Total Phenolic ◽  
Betel Leaf ◽  
Dpph Method

The research objectives were to identify the secondary metabolite components, total phenolic content and determine the antioxidant activity of the ethanol extract of red betel leaf (Piper crocatum Ruiz & Pav.). The extraction process was carried out by materation using ethanol as a solvent. Determination of total phenolic content was carried out colorimetrically with Folin-Ciocalteu reagent measured at a maximum wavelength of 765 nm. Determination of antioxidant activity using the DPPH method measured by spectrophotometry at a maximum wavelength of 517 nm. The results of phytochemical screening of the ethanolic extract of red betel leaf contain secondary metabolites, including flavonoid, phenolic, tannin, alkaloids, steroids, and triterpenoids. The total phenolic content of the red betel leaf ethanol extract was 0.949±0.003 mg GAE/g d.w. and has antioxidant activity (IC50) 84,656 including strong category as an antioxidant. Keywords: Piper crocatum Ruiz & Pav., Antioxidant, Ethanol extract, Folin-Ciocalteu and DPPH

A paper-based device for simultaneous determination of antioxidant activity and total phenolic content in food samples

Talanta ◽  
2019 ◽  
Vol 198 ◽  
pp. 542-549 ◽  
Author(s):  
Chanoknan Puangbanlang ◽  
Kitima Sirivibulkovit ◽  
Duangjai Nacapricha ◽  
Yupaporn Sameenoi
Keyword(s):  
Antioxidant Activity ◽  
Simultaneous Determination ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Food Samples ◽  
Total Phenolic

scholarly journals Characterization of Eucalyptus, Chestnut and Heather Honeys from Portugal Using Multi-Parameter Analysis and Chemo-Calculus

Foods ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 194 ◽  
Author(s):  
Ioannis Karabagias ◽  
Miguel Maia ◽  
Vassilios Karabagias ◽  
Ilias Gatzias ◽  
Anastasia Badeka
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Solid Phase ◽  
Parameter Analysis ◽  
Total Phenolic ◽  
Activity Parameter ◽  
In Vitro Antioxidant Activity

The present study was conducted to evaluate the quality and bio-functional properties of Portuguese honeys of different botanical and geographical origins. Quality parameter analyses included the determination of palynological (predominant, secondary, minor and isolated pollen percentage), physicochemical (°Brix, moisture content, pH, electrical conductivity, free acidity, total dissolved solids, salinity, vitamin C content and specific weight) including colour-metrics (CIELAB, Pfund and colour intensity determinations), along with volatile compounds identification using solid phase micro-extraction coupled to gas chromatography mass spectrometry. Bio-activity parameter analysis included the determination of in vitro antioxidant activity and total phenolic content using the 2,2-diphenyl-1-picryl-hydrazyl and Folin-Ciocalteu assays, respectively. Melissopalynological analysis showed that Portuguese honeys were classified as eucalyptus, chestnut and heather, recording significant variations (p < 0.05) among physicochemical, volatile and bio-activity parameter analyses according to both: botanical and geographical origin. Based on the multi-parameter analysis data Portuguese honeys could be characterized by a distinctive colour, a characteristic aroma, whereas conform to the European legislation relating to honey identity and quality. Specific attention should be given in the case of heather honey which showed the highest in vitro antioxidant activity and total phenolic content. Parameters that were also highly correlated using bivariate statistics.

Lab-on-a-disc for simultaneous determination of total phenolic content and antioxidant activity of beverage samples

Lab on a Chip ◽  
2016 ◽  
Vol 16 (17) ◽  
pp. 3268-3275 ◽  
Author(s):  
Apichai Phonchai ◽  
Yubin Kim ◽  
Rattikan Chantiwas ◽  
Yoon-Kyoung Cho
Keyword(s):  
Antioxidant Activity ◽  
Simultaneous Determination ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Beverage Samples

This paper reports the simultaneous determination of TPC and AA of beverages using lab-on-a-disc.

scholarly journals STATISTICAL OPTIMIZATION OF MEDIUM COMPONENTS BY PLACKETT BURMAN DESIGN AND RESPONSE SURFACE METHODOLOGY FOR ENHANCED ANTIOXIDANT ACTIVITY BY XYLARIA FEEJEENSIS HMJAU22039

2016 ◽  
Vol 8 (11) ◽  
pp. 159
Author(s):  
Durga Rebbapragada ◽  
Rajagopal Kalyanaraman
Keyword(s):  
Antioxidant Activity ◽  
Response Surface ◽  
Yeast Extract ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Statistical Optimization ◽  
Antioxidant Potential ◽  
Total Phenolic ◽  
Burman Design ◽  
Plackett Burman Design

Objective: To enhance the antioxidant potential of Xylaria feejeensis by statistical optimization. The components of potato dextrose yeast extract (PDYEB) medium: potato infusion, dextrose and yeast extract were investigated to optimize antioxidant activity by Plackett-Burman design (P-B design). The interaction between the critical components of the medium and incubation time was further investigated by Response Surface Method (RSM) and the culture conditions were optimized for enhancing antioxidant activity. Central composite design (CCD) was employed and quadratic response surface model was used to analyze the data using analysis of variance (ANOVA).Methods: The antioxidant potential was measured by 1-1diphenyl-2-picryl-hydrazil (DPPH) radical scavenging assay, nitric oxide (NO) scavenging assay. The antioxidant activity was compared with total phenolic content measured by Folin-Ciocalteau (FC) reagent based assay.Results: Plackett-Burman design revealed dextrose and yeast extract to be the most significant components of PDYEB medium (p<.0001). ANOVA analysis showed that the model was highly significant (p<0.0001) for antioxidant activity measured by DPPH, NO scavenging and TPC (total phenolic content). The model was justified by applying the optimized conditions and values of 87.38%, 56.43%, 27.28 mg/g for DPPH, NO scavenging and TPC respectively were obtained. The estimated optimum conditions of the variables for the antioxidant activity and phenolic content are 12.72g of dextrose, 1.67g yeast extract, and incubation period of 23.43 d.Conclusion: The study highlights the importance of various components of the medium and the physiochemical limitations in antioxidant potential and phenol production of the fungal strain. 

scholarly journals Optimization of the extraction of phenolic compounds and antioxidant activity from the roots of Waltheria ovata using the response surface methodology

Food Research ◽  
2020 ◽  
Vol 4 (6) ◽  
pp. 2095-2102
Author(s):  
O. Herrera-Calderon ◽  
R. Vega
Keyword(s):  
Antioxidant Activity ◽  
Response Surface Methodology ◽  
Phenolic Compounds ◽  
Response Surface ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Natural Antioxidants ◽  
Total Phenolic ◽  
Dpph Assay ◽  
Sample Ratio

Waltheria ovata is a medicinal plant belonging to the Sterculiaceae genus. Natural products of Waltheria ovata could be used in the food industry as natural antioxidants due to its high content of polyphenols according to the literature. The main objective in this research was to optimize the extraction of phenolic compounds and the antioxidant activity from Waltheria ovata roots using response surface methodology (RSM). The total phenolic content in different extracts was determined by spectrophotometric method (Folin-Ciocalteu reagent) and the antioxidant activity by using DPPH assay. To optimize the conditions for total phenolic content and antioxidant activity were used three independent variables: solvent/sample ratio (1:10, 1:20 and 1:30 g/mL), temperature (40, 50, and 60°C) and time (40, 50 and 60 mins). The results showed that total phenolic content and antioxidant activity in the experiments ranged from 8.7 to 12.1 mg GAE/g and 76.1% to 96.7%, respectively. The coefficients of determination (R2 values) for phenolic content and antioxidant activity were 0.86 and 0.91, respectively. Under the optimum conditions of 1:20 g/mL, 60°C and 55 mins of extraction, the values for total phenolic content and antioxidant activity were 0.448±0.02 mg GAE/g and 87.00±2.0%, respectively. These data showed that the experimental responses were reasonably close to the predicted responses (0.444 mg GAE/g and 84.67%). Therefore, the results showed that Waltheria ovata can be used as antioxidant in foods.

Sign in / Sign up

Export Citation Format

Share Document