References

• Al-Farsi, M. A., & Lee, C. Y. (2008). Optimization of phenolics and dietary fibre extraction from date seeds. Food Chemistry, 108, 977–985.
   PubMed Web of Science ®Google Scholar
• Belwal, T., Dhyani, P., Bhatt, I. D., Rawal, R. S., & Pande, V. (2016). Optimization extraction conditions for improving phenolic content and antioxidant activity in Berberis asiatica fruits using response surface methodology (RSM). Food Chemistry, 207, 115–124.
   PubMed Web of Science ®Google Scholar
• Benzie, I. F., & Strain, J. J. (1996). The ferric reducing ability of plasma (FRAP) as a measure of “antioxidant power”: The FRAP assay. Analytical Biochemistry, 239, 70–76.
   PubMed Web of Science ®Google Scholar
• Box, G. E. P., & Behnken, D. W. (1960). Simplex-sum designs: A class of second order rotatable designs derivable from those of first order. The Annals of Mathematical Statistics, 31, 838–864.
   Google Scholar
• Cacace, J. E., & Mazza, G. (2003). Mass transfer process during extraction of phenolic compounds from milled berries. Journal of Food Engineering, 59, 379–389.
   Web of Science ®Google Scholar
• Ćujić, N., Šavikin, K., Janković, T., Pljevljakušić, D., Zdunić, G., & Ibrić, S. (2016). Optimization of polyphenols extraction from dried chokeberry using maceration as traditional technique. Food Chemistry, 194, 135–142.
   PubMed Web of Science ®Google Scholar
• da Silva, L. M. R., De Figueiredo, E. A. T., Ricardo, N. M. P. S., Vieira, I. G. P., De Figueiredo, R. W., Brasil, I. M., & Gomes, C. L. (2014). Quantification of bioactive compounds in pulps and by-products of tropical fruits from Brazil. Food Chemistry, 143, 398–404.
   PubMed Web of Science ®Google Scholar
• Dong, Y., Huang, H., Zhao, M., Sun-Waterhouse, D., Lin, L., & Xiao, C. (2016). Mechanisms underlying the xanthine oxidase inhibitory effects of dietary flavonoids galangin and pinobanksin. Journal of Functional Foods, 24, 26–36.
   Web of Science ®Google Scholar
• Dranca, F., & Oroian, M. (2016). Optimization of ultrasound-assisted extraction of total monomeric anthocyanin (TMA) and total phenolic content (TPC) from eggplant (Solanum melongena L.) peel. Ultrasonics Sonochemistry, 31, 637–646.
   PubMed Web of Science ®Google Scholar
• Feng, S., Luo, Z., Tao, B., & Chen, C. (2015). Ultrasonic-assisted extraction and purification of phenolic compounds from sugarcane (Saccharum officinarum L.) rinds. LWT-Food Science and Technology, 60(2), 970–976.
   Web of Science ®Google Scholar
• Halake, K., Birajdar, M., & Lee, J. (2016). Structural implications of polyphenolic antioxidants. Journal of Industrial and Engineering Chemistry, 35, 1–7.
   Web of Science ®Google Scholar
• Hea, L., Zhanga, X., Xua, H., Xua, C., Yuana, F., Knezb, Ž., … Gao, Y. (2012). Subcritical water extraction of phenolic compounds from pomegranate (Punica granatum L.) seed residues and investigation into their antioxidant activities 424 with HPLC–ABTS assay. Food and Bioproducts Processing, 90, 215–223.
   Web of Science ®Google Scholar
• Hegazy, A., & Ibrahim, M. (2012). Antioxidant activities of orange peel extracts. World Applied Sciences Journal, 2012(18), 684e8.
   Google Scholar
• Honda, S., Fukuyama, Y., Nishiwaki, H., Masuda, A., & Masuda, T. (2017). Conversion to purpurogallin, a key step in the mechanism of the potent xanthine oxidase inhibitory activity of pyrogallol. Free Radical Biology and Medicine, 106, 228–235.
   PubMed Web of Science ®Google Scholar
• Kelley, E. E., Khoo, N. K., Hundley, N. J., Malik, U. Z., Freeman, B. A., & Tarpey, M. M. (2010). Hydrogen peroxide is the major oxidant product of xanthine oxidase. Free Radical Biology and Medicine, 48, 493–498.
   PubMed Web of Science ®Google Scholar
• Khoddami, A., Wilkes, M. A., & Roberts, T. H. (2013). Techniques for analysis of plant phenolic compounds. Molecules, 18, 2328–2375.
   PubMed Web of Science ®Google Scholar
• Kumar, K., Yadav, A. N., Kumar, V., Vyas, P., & Dhaliwal, H. S. (2017). Food waste: A potential bioresource for extraction of nutraceuticals and bioactive compounds. Bioresources and Bioprocessing, 4, 18.
   Google Scholar
• Lai, T. N. H., André, C. M., Chirinos, R., Nguyen, T. B. T., Larondelle, Y., & Rogez, H. (2014). Optimization of extraction of piceatannol from Rhodomyrtus tomentosa seeds using response surface methodology. Separation and Purification Technology, 134, 139–146.
   Web of Science ®Google Scholar
• Liang, Q., Cui, J., Li, H., Liu, J., & Zhao, G. (2013). Florets of Sunflower (Helianthus annuus L.): Potential new sources of dietary fiber and phenolic acids. Journal of Agricultural and Food Chemistry, 61, 3435–3442.
   PubMed Web of Science ®Google Scholar
• Liu, Y., Luo, X., Lan, X., Tang, J., Zhao, P., & Kan, H. (2018). Ultrasonic-assisted extraction and antioxidant capacities of flavonoids from Camellia fascicularis leaves. CyTA - Journal of Food, 16(1), 105–112.
   Web of Science ®Google Scholar
• Luthria, D. L., & Mukhopadhyay, S. (2006). Influence of sample preparation on assay of phenolic acids from eggplant. Journal of Agricultural and Food Chemistry, 54, 41–47.
   PubMed Web of Science ®Google Scholar
• Mehmood, A., Zhao, L., Wang, C., Nadeem, M., Raza, A., Ali, N., & Shah, A. A. (2017). Management of hyperuricemia through dietary polyphenols as a natural medicament: A comprehensive review. Critical Reviews in Food Science and Nutrition, 1–23. doi:10.1080/10408398.2017.1412939
   PubMedGoogle Scholar
• Mirabella, N., Castellani, V., & Sala, S. (2014). Current options for the valorization of food manufacturing waste: A review. Journal of Cleaner Production, 65, 28–41.
   Web of Science ®Google Scholar
• Mittal, A., Phillips, A. R., Loveday, B., & Windsor, J. A. (2008). The potential role for xanthine oxidase inhibition in major intra-abdominal surgery. World Journal of Surgery, 32, 288–295.
   PubMed Web of Science ®Google Scholar
• Myers, R. H., & Montgomery, D. C. (2002). Response surface methodology: Process and product optimization using designed experiments (2nd ed.). Wiley: New York.
   Google Scholar
• Re, R., Pellegrini, N., Proteggente, A., Pannala, A., Yang, M., & Rice-Evans, C. (1999). Antioxidant activity applying an improved ABTS radical cation decolorization assay. Free Radical Biology and Medicine, 26, 1231–1237.
   PubMed Web of Science ®Google Scholar
• Safdar, M. N., Kausar, T., Jabbar, S., Mumtaz, A., Ahad, K., & Saddozai, A. A. (2017). Extraction and quantification of polyphenols from kinnow (Citrus reticulate L.) peel using ultrasound and maceration techniques. Journal of Food and Drug Analysis, 25, 488–500.
   PubMed Web of Science ®Google Scholar
• Sai-Ut, S., Benjakul, S., Kraithong, S., & Rawdkuen, S. (2015). Optimization of antioxidants and tyrosinase inhibitory activity in mango peels using response surface methodology. LWT-Food Science and Technology, 64, 742–749.
   Web of Science ®Google Scholar
• Sarkis, J. R., Michel, I., Tessaro, I. C., & Marczak, L. D. F. (2014). Optimization of phenolics extraction from sesame seed cake. Separation and Purification Technology, 122, 506–514.
   Web of Science ®Google Scholar
• Saurav, K., & Kannabiran, K. (2012). Cytotoxicity and antioxidant activity of 5-(2, 4-dimethylbenzyl) pyrrolidin-2-one extracted from marine Streptomyces VITSVK5 spp. Saudi Journal of Biological Sciences, 19, 81–86.
   PubMed Web of Science ®Google Scholar
• Singleton, V. L., & Rossi, J. A. (1965). Colorimetry of total phenolics with phosphomolybdic-phosphotungstic acid reagents. American Journal of Enology and Viticulture, 16, 144–158.
   Google Scholar
• Vázquez, G., Fernández-Agulló, A., Gómez-Castro, C., Freire, M. S., Antorrena, G., & González-Álvarez, J. (2012). Response surface optimization of antioxidants extraction from chestnut (Castanea sativa) bur. Industrial Crops and Products, 35(1), 126–134.
   Web of Science ®Google Scholar
• Wang, Y., Zhang, G., Pan, J., & Gong, D. (2015). Novel insights into the inhibitory mechanism of kaempferol on xanthine oxidase. Journal of Agricultural and Food Chemistry, 63, 526–534.
   PubMed Web of Science ®Google Scholar
• Wang, Z., Kwon, S. H., Hwang, S. H., Kang, Y. H., Lee, J. Y., & Lim, S. S. (2017). Competitive binding experiments can reduce the false positive results of affinity-based ultrafiltration-HPLC: A case study for identification of potent xanthine oxidase inhibitors from Perilla frutescens extract. Journal of Chromatography B, 1048, 30–37.
   PubMed Web of Science ®Google Scholar
• Yan, J., Zhang, G., Hu, Y., & Ma, Y. (2013). Effect of luteolin on xanthine oxidase: Inhibition kinetics and interaction mechanism merging with docking simulation. Food Chemistry, 141, 3766–3773.
   PubMed Web of Science ®Google Scholar
• Ye, F., Liang, Q., Li, H., & Zhao, G. (2015). Solvent effects on phenolic content, composition, and antioxidant activity of extracts from florets of sunflower (Helianthus annuus L.). Industrial Crops and Products, 76, 574–581.
   Web of Science ®Google Scholar
• Zhang, Y.-J., Zhang, J.-X., Cheng, F., Shen, X.-L., & Wang, Z. (2016). Isolation and structural characterization of a low-molecular-weight pectic polysaccharide SHPPB-1 isolated from sunflower heads. Journal of Carbohydrate Chemistry, 35, 273–285.
   Web of Science ®Google Scholar
• Zhao, L., Li, S., Zhu, Y., & Hao, T. (2015). Antioxidant activities and major bioactive components of consecutive extracts from blue honeysuckle (Lonicera Caerulea L.) cultivated in China. Journal of Food Biochemistry, 39, 653–662.
   Web of Science ®Google Scholar
• Zhao, L., Luo, Y. C., Wang, C. T., & Ji, B. P. (2011). Antioxidant activity of protein hydrolysates from aqueous extract of velvet antler (Cervus elaphus) as influenced by molecular weight and enzymes. Natural Product Communications, 6, 1683–1688.
   PubMed Web of Science ®Google Scholar