Soybean Oil Enriched with Antioxidants Extracted from Watermelon (Citrullus colocynthis) Skin Sap and Coated in Hydrogel Beads via Ionotropic Gelation
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.1.1. Plant Material
2.1.2. Materials
2.2. C. colocynthis Watermelon Skin Extration
2.2.1. Percolation Extraction
2.2.2. Ultrasound-Assisted Extraction (UAE)
2.3. Sample Preparation for Antioxidant Tests in Soybean Oil
2.4. Analytical Methods
2.4.1. Measuring the Amounts of Phenolic Compounds of WSS
2.4.2. Measuring DPPH Radical Scavenging Activity Assay
2.4.3. Measuring the Acid Value of Oil
- N = normality
- V = volume of sodium hydroxide titrant used (mL)
- W = weight of the fatty oil being examined (g)
2.4.4. Thiobarbituric-Acid-Reactive Substances (TBARS) Assay
2.5. Response Surface Methodology
2.6. Preparation and Evaluation of Emulsion
2.6.1. Emulsion Preparation
2.6.2. OW Emulsion Stability Evaluation
2.7. Preparation of Hydrogel Beads
2.8. Determination of Encapsulation Efficiency
2.9. Analysis of Hydrogel Beads
2.9.1. Size Analysis
2.9.2. Morphological Characterization
2.10. Statistical Analysis
Analysis of Variance (ANOVA)
3. Results and Discussions
3.1. Optimization Process Variables
3.2. Interpretation of Free Radical Scavenging Activity of Diphenyl-1-Picrylhydrazyl (DPPH)
3.3. Interpretation of the Total Phenolic Content
3.4. Effect of Antioxidants on Oxidation of Soybean Oil
3.4.1. Determination of Acidity Index
3.4.2. Determination of Thiobarbituric Acid
3.5. Evaluation of Oil-in-Water Emulsions
Encapsulation Efficiency
3.6. Hydrogel Bead Characterization
Discussions
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Levels | Factors | ||
---|---|---|---|
Upper | Center | Lower | |
100 | 60 | 20 | (X1) (kHz) (Intensity of sound) |
150 | 100 | 50 | (X2) (ppm) (Concentration of sap) |
15 | 10 | 5 | (X3) (min) (Extraction time) |
Intensity of Sound (kHz) | Concentration (ppm) | Time (minutes) | DPPH (%) | Folin–Ciocalteau (Milligrams of Gallic Acid per Gram of Extract) |
---|---|---|---|---|
100 | 200 | 10 | 56.80 ± 0.2 | 18.25 ± 0.2 |
60 | 200 | 5 | 49.60 ± 0.3 | 14.85 ± 0.1 |
20 | 200 | 10 | 39.14 ± 0.25 | 15.85 ± 0.25 |
60 | 200 | 15 | 44.79 ± 0.4 | 14.37 ± 0.5 |
60 | 120 | 10 | 49.54 ± 0.5 | 14.88 ± 0.2 |
20 | 120 | 15 | 25.39 ± 0.2 | 11.80 ± 0.3 |
100 | 120 | 5 | 49.2 ± 0.25 | 15.00 ± 0.15 |
100 | 120 | 15 | 43.17 ± 0.4 | 14.37 ± 0.4 |
100 | 40 | 10 | 50.52 ± 0.2 | 16.07 ± 0.1 |
60 | 40 | 5 | 39.65 ± 0.1 | 12.80 ± 0.5 |
20 | 40 | 10 | 30.79 ± 0.3 | 12.57 ± 0.3 |
60 | 40 | 15 | 36.50 ± 0.2 | 11.39 ± 0.1 |
Extraction Method | Power Inhibitory Free Radical (%) | Phenolic Compounds (Grams) |
---|---|---|
Optimized extraction | 57.084 a | 18.248 a |
Percolation | 41.19 b | 15.32 b |
Source | S. Squares | df | M. Square | F. Value | p-Value | Significance |
---|---|---|---|---|---|---|
Model | 47.42 | 9 | 5.27 | 194.54 | <0.0001 | Sig |
A-intensity of sound | 15.12 | 1 | 15.12 | 558.41 | <0.0001 | |
B-concentration | 13.76 | 1 | 13.76 | 508.03 | <0.0001 | |
C-time | 1.27 | 1 | 1.27 | 47.02 | <0.0001 | |
AB | 0.3 | 1 | 0.3 | 11.17 | 0.0075 | |
AC | 4 × 10−4 | 1 | 4 × 10−4 | 0.015 | 0.9057 | |
BC | 0.22 | 1 | 0.22 | 8.02 | 0.0178 | |
A^2 | 0.85 | 1 | 0.85 | 31.24 | 0.0002 | |
B^2 | 0.63 | 1 | 0.63 | 23.39 | 0.0007 | |
C^2 | 16.55 | 1 | 16.55 | 611.05 | <0.0001 | |
Residual | 0.27 | 10 | 0.027 | |||
Lack of Fit | 0.15 | 3 | 0.049 | 2.76 | 0.1215 | N.Sig |
Pure Error | 0.12 | 7 | 0.018 | |||
Cor Total | 47.69 | 19 |
Source | S. Squares | df | M. Square | F. Value | p-Value | Significance |
---|---|---|---|---|---|---|
Model | 1353.53 | 9 | 150.39 | 157.82 | <0.0001 | Sig |
A-intensity of sound | 713.1 | 1 | 713.1 | 748.32 | <0.0001 | |
B-concentration | 135.05 | 1 | 135.05 | 141.73 | <0.0001 | |
C-time | 38.02 | 1 | 38.02 | 39.9 | <0.0001 | |
AB | 1.07 | 1 | 1.07 | 1.12 | 0.314 | |
AC | 1.66 | 1 | 1.66 | 1.75 | 0.2158 | |
BC | 0.69 | 1 | 0.69 | 0.72 | 0.4151 | |
A^2 | 143.74 | 1 | 143.74 | 150.84 | <0.0001 | |
B^2 | 0.65 | 1 | 0.65 | 0.68 | 0.4276 | |
C^2 | 242.61 | 1 | 242.61 | 254.6 | <0.0001 | |
Residual | 9.53 | 10 | 0.95 | |||
Lack of Fit | 1.99 | 3 | 0.66 | 0.62 | 0.6267 | N-Sig |
Pure Error | 7.54 | 7 | 1.08 | |||
Cor Total | 1363.06 | 19 |
R-Squared | 0.9943 |
Adj R-Squared | 0.9892 |
Pred R-Squared | 0.9474 |
R-Squared | 0.9837 |
Adj R-Squared | 0.9711 |
Pred R-Squared | 0.9303 |
Beads | Mean Area (mm2) | Mean Roundness | Mean Diameter (mm) |
---|---|---|---|
Hydrogel beads obtained | 3.48 ± 0.01 | 0.84 ± 0.04 | 2.1 ± 0.03 |
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Farooq, M.; Azadfar, E.; Trif, M.; Jabaleh, R.A.; Rusu, A.; Bahrami, Z.; Sharifi, M.; Bangar, S.P.; Ilyas, N.; Ștefănescu, B.E.; et al. Soybean Oil Enriched with Antioxidants Extracted from Watermelon (Citrullus colocynthis) Skin Sap and Coated in Hydrogel Beads via Ionotropic Gelation. Coatings 2021, 11, 1370. https://doi.org/10.3390/coatings11111370
Farooq M, Azadfar E, Trif M, Jabaleh RA, Rusu A, Bahrami Z, Sharifi M, Bangar SP, Ilyas N, Ștefănescu BE, et al. Soybean Oil Enriched with Antioxidants Extracted from Watermelon (Citrullus colocynthis) Skin Sap and Coated in Hydrogel Beads via Ionotropic Gelation. Coatings. 2021; 11(11):1370. https://doi.org/10.3390/coatings11111370
Chicago/Turabian StyleFarooq, Muhammad, Elham Azadfar, Monica Trif, Ramezan Ali Jabaleh, Alexandru Rusu, Zohre Bahrami, Mahniya Sharifi, Sneh Punia Bangar, Naila Ilyas, Bianca Eugenia Ștefănescu, and et al. 2021. "Soybean Oil Enriched with Antioxidants Extracted from Watermelon (Citrullus colocynthis) Skin Sap and Coated in Hydrogel Beads via Ionotropic Gelation" Coatings 11, no. 11: 1370. https://doi.org/10.3390/coatings11111370