Effects of steaming and drying on quality and antioxidant activity of white-fleshed sweet potato powder (Ipomoea batatas)

Abstract

White-fleshed sweet potatoes (WFSP) are rich sources of polyphenols. The flesh of PFSP contains total polyphenol content (TPC) at 1.52 mgGAE/g fresh weight. The raw material's total free radical scavenging capacity was estimated (at 42.4% DPPH). The inactivation of peroxidase (POD) and polyphenol oxidase (PPO), the breakdown of total phenolic compounds, antioxidant activity, and the whiteness of WFSP were evaluated during steam blanching from 0 to 9 minutes. Steam blanching time from 7 to 9 minutes at boiling temperature (100oC) inactivated most of the POD and PPO enzymes (71.2% and 70.5%, respectively), thus TPC and antioxidant activity remains high, resulting in a bright white product. After 7 minutes of blanching, drying experiments of WFSP slices were conducted at air temperatures of 50 to 80oC. The best alternative for describing and understanding the drying of WFSP slices was the Page model. In the temperature’s ranges, the values of the moisture diffusivity (Deff) and activation energy are obtained from 3.059×10−12 to 5.095×10−12 m2/s and 14.93 kJ/mol, respectively. The drying temperature of 70oC for 10 hours was suitable for producing WFSP powder with low water activity (0.5) and moisture content (6.5%), high TPC and antioxidant activity, and low specific energy consumption. These results suggested that the WFSP powder exhibited potential as a nutraceutical ingredient product.

Keywords: White flesh sweet potatoes, blanching, drying, quality, antioxidant activity, modeling.

• Ajuebor, F., Aworanti, O. A., Agbede, O. O., Agarry, S. E., Afolabi, T. J., & Ogunleye, O. O. (2022). Drying Process Optimization and Modelling the Drying Kinetics and Quality Attributes of Dried Chili Pepper (Capsicum frutescens L.). Trends in Sciences, 19(17), 5752-5752. https://doi.org/10.48048/tis.2022.5752
• Akpinar, E. K., & Bicer, Y. (2008). Mathematical modeling of thin layer drying process of long green pepper in the solar dryer and under open sun. Energy Conversion and Management, 49(6), 1367-1375. https://doi.org/10.1016/j.enconman.2008.01.004
• Akpinar, E., Midilli, A., & Bicer, Y. (2003). Single layer drying behavior of potato slices in a convective cyclone dryer and mathematical modeling. Energy Conversion and Management, 44(10), 1689-1705. https://doi.org/10.1016/S0196-8904(02)00171-1
• Alara, O. R., Abdurahman, N. H., & Olalere, O. A. (2019). Mathematical modeling and morphological properties of thin layer oven drying Vernonia amygdalina leaves. Journal of the Saudi Society of Agricultural Sciences 18(3), 309-315. https://doi.org/10.1016/j.jssas.2017.09.003
• Amajor, J. U., Eleazu, C. O., Oti, E., Ikpeam, A. I., & Udoh, E. F. (2011). Effect of variety on five new sweet potato varieties' physicochemical, carotenoid, and microbial loads of flours. Biotechnology 10, 286-291. https://doi.org/10.3923/biotech.2011.286.291
• AOAC. (2005). Official Methods of Analysis for Ash, moisture in flour (18th ed.). Association of Official Analytical Chemists, 929; 09 & 03, chap 32, 1-2. Arlington, USA.
• Brand-Williams, W., Cuvelier, M. E., & Berset, C. L. W. T. (1995). Use of a free radical method to evaluate antioxidant activity. LWT-Food Science and Technology, 28(1), 25-30. https://doi.org/10.1016/S0023-6438(95)80008-5
• De Albuquerque, T. M. R., Sampaio, K. B., & de Souza, E. L. (2019). Sweet potato roots: Unrevealing an old food as a source of health-promoting bioactive compounds–A review. Trends in Food Science and Technology, 85, 277-286. https://doi.org/10.1016/j.tifs.2018.11.006
• Dibacto, R. E. K., Tchuente, B. R. T., Nguedjo, M. W., Tientcheu, Y. M. T., Nyobe, E. C., Edoun, F. L. E., Kamini, M. F. G., Dibanda, R. F., & Medoua, G. N. (2021). Total polyphenol and flavonoid content and antioxidant capacity of some varieties of Perseaamericana peels consumed in Cameroon. The Scientific World Journal, 2021, Article 8882594. https://doi.org/10.1155/2021/8882594
• Dibanda, R. F., Akdowa, E. P., & Tongwa, Q. M. (2020). Effect of microwave blanching on some fruit peelings' antioxidant activity, phenolic compounds, and browning behavior. Food Chemistry, 302, 125308. https://doi.org/10.1016/j.foodchem.2019.125308
• El Broudi, S., Zehhar, N., Abdenouri, N., Boussaid, A., Hafidi, A., Bouamama, H., & Benkhalti, F. (2022). Investigation of drying kinetics and drying conditions on biochemical, sensory, and microstructural parameters of" Sefri" pomegranate arils (Punica granatum L. a Moroccan variety). Revista Mexicana de Ingeniería Química, 21(3), Alim2813. http://doi.org/10.24275/rmiq/Alim2813
• Fante, L., & Noreña, C. P. Z. (2012). Enzyme inactivation kinetics and color changes in Garlic (Allium sativum L.) blanched under different conditions. Journal of Food Engineering, 108(3), 436-443. https://doi.org/10.1016/j.jfoodeng.2011.08.024
• Fellows, P. J. (2022). Food processing technology: principles and practice. Woodhead publishing.
• Franková, H., Musilová, J., Árvay, J., Šnirc, M., Jančo, I., Lidiková, J., & Vollmannová, A. (2022). Changes in antioxidant properties and phenolics in sweet potatoes (Ipomoea batatas L.) due to heat treatments. Molecules, 27(6), 1884. https://doi.org/10.3390/molecules27061884
• Fu, Z. F., Tu, Z. C., Zhang, L., Wang, H., Wen, Q. H., & Huang, T. (2016). Antioxidant activities and polyphenols of sweet potato (Ipomoea batatas L.) are extracted with solvents of various polarities. Food Bioscience, 15, 11-18. https://doi.org/10.1016/j.fbio.2016.04.004
• Hultin, H. O., Sun, B., & Bulger, J. (1966). Pectin methyl esterases of the banana. Purification and properties. Journal of Food Science, 31(3), 320-327. https://doi.org/10.1111/j.1365-2621.1966.tb00500.x
• Iese, V., Holland, E., Wairiu, M., Havea, R., Patolo, S., Nishi, M., Hoponoa, T., Bourke, R. M., Dean, A., & Waqainabete, L. (2018). Facing food security risks: The rise and rise of the sweet potato in the Pacific Islands. Global Food Security, 18, 48-56. https://doi.org/10.1016/j.gfs.2018.07.004
• Jung, J. K., Lee, S. U., Kozukue, N., Levin, C. E., & Friedman, M. (2011). Distribution of phenolic compounds and antioxidant activities in parts of sweet potato (Ipomoea batata L.) plants and home-processed roots. Journal of Food Composition and Analysis, 24(1), 29-37. https://doi.org/10.1016/j.jfca.2010.03.025
• Krokida, M. K., Karathanos, V. T., Maroulis, Z. B., & Marinos-Kouris, D. (2003). Drying kinetics of some vegetables. Journal of Food Engineering, 59(4), 391-403.
• Li, M., Ma, M., Zhu, K. X., Guo, X. N., & Zhou, H. M. (2017). Critical conditions accelerating the deterioration of fresh noodles: A study on temperature, pH, water content, and water activity. Journal of Food Processing and Preservation, 41(4), e13173. https://doi.org/10.1111/jfpp.13173
• Lien, K. W., Hsieh, D. P., Huang, H. Y., Wu, C. H., Ni, S. P., & Ling, M. P. (2016). Food safety risk assessment for estimating dietary intake of sulfites in the Taiwanese population. Toxicology Reports 3, 544-551. https://doi.org/10.1016/j.toxrep.2016.06.003
• Loan, L. T. K., & Tai, N. V. (2023). Process of foam-mat drying of purple rice bran extract and evaluation of product properties. Revista Mexicana de Ingeniería Química, 22(3), Alim23148. https://doi.org/10.24275/rmiq/Alim23148
• Makori, S. I., Mu, T. H., & Sun, H. N. (2020). Total polyphenol content, antioxidant activity, and individual phenolic composition of different edible parts of 4 sweet potato cultivars. Natural Product Communications 15(7), 1934578X20936931. https://doi.org/10.1177/1934578X20936931
• Managa, M. G., Shai, J., Thi Phan, A. D., Sultanbawa, Y., & Sivakumar, D. (2020). Impact of household cooking techniques on African nightshade and Chinese cabbage on phenolic compounds, antinutrients, in vitro antioxidant, and β-glucosidase activity. Frontiers in Nutrition, 7, 580550. https://doi.org/10.3389/fnut.2020.580550
• Mu, T., & Singh, J. (2019). Sweet potato: chemistry, processing, and nutrition (Eds.). Academic Press, UK.
• Mulinacci, S. (1996). An approximation of American option prices in a jump-diffusion model. Stochastic Processes and their Applications, 62(1), 1-17. https://doi.org/10.1016/0304-4149(95)00085-2
• Najla, M., & Bawatharani, R. (2019). Evaluation of page model on drying kinetics of red chilies. Iconic Research and Engineering Journals, 2, 6-10.
• Nanasombat, S., Thonglong, J., & Jitlakha, J. (2015). Formulation and characterization of novel functional beverages with antioxidant and anti-acetylcholinesterase activities. Functional Foods in Health and Disease, 5(1), 1-16. https://doi.org/10.31989/ffhd.v5i1.162
• Nascimento, R. F. D., & Canteri, M. H. G. (2018). Effect of blanching on physicochemical characteristics of potato flour. HorticulturaBrasileira, 36, 461-465. https://doi.org/10.1590/S0102-053620180406
• Ngo, T. V., Kunyanee, K., & Luangsakul, N. (2023). Insights into Recent Updates on Factors and Technologies That Modulate the Glycemic Index of Rice and Its Products. Foods, 12(19), 3659. https://doi.org/10.3390/foods12193659
• Ngo, T. V., Kusumawardani, S., Kunyanee, K., & Luangsakul, N. (2022). Polyphenol-modified starches and their applications in the food industry: Recent updates and future directions. Foods, 11(21), 3384. https://doi.org/10.3390/foods11213384
• Nguyen, H. M. S., Nguyen, D. K., & Chau, H. T. T. (2019). Pathogen identification of sweet potato wilt in Bình Tân, Vĩnh Long. Can Tho University Journal of Science, 11(3), 36. https://doi.org/10.22144/ctu.jen.2019.036
• Oke, M. O., & Workneh, T. S. (2013). A review on sweet potato postharvest processing and preservation technology. African Journal of Agricultural Research, 8(40), 4990-5003. https://doi.org/10.5897/AJAR2013.6841
• Okeleye, A. F., Akanbi, C. T., & Morakinyo, T. A. (2021). Modeling thin layer drying characteristics of blanch-assisted water yam (Dioscorea alata) slices. Croatian Journal of Food Science and Technology, 13(1), 43-50. https://doi.org/10.17508/CJFST.2021.13.1.06
• Rashid, M. T., Liu, K., Jatoi, M. A., Safdar, B., Lv, D., & Li, Q. (2022). Energy-efficient drying technologies for sweet potatoes: Operating and drying mechanism, quality-related attributes. Frontiers in Nutrition, 9, 1040314. https://doi.org/10.3389/fnut.2022.1040314
• Rosa, D. P., Cantú-Lozano, D., Luna-Solano, G., Polachini, T. C., & Telis-Romero, J. (2015). Mathematical modeling of orange seed drying kinetics. Ciência e Agrotecnologia, 39, 291-300. https://doi.org/10.1590/S1413-70542015000300011
• Ruttarattanamongkol, K., Chittrakorn, S., Weerawatanakorn, M., & Dangpium, N. (2016). Effect of drying conditions on properties, pigments, and antioxidant activity retentions of pretreated orange and purple-fleshed sweet potato flours. Journal of Food Science and Technology, 53, 1811-1822. https://doi.org/10.1007/s13197-015-2086-7
• Saini, R., Kaur, S., Aggarwal, P., & Dhiman, A. (2023). The influence of conventional and novel blanching methods on potato granules, phytochemicals, and thermal properties of colored varieties. Frontiers in Nutrition, 10, 1178797. https://doi.org/10.3389/fnut.2023.1178797
• Selvi, K. Ç. (2020). Investigating the influence of the infrared drying method on Linden (TiliaplatyphyllosScop.) leaves kinetics, color, projected area, modeling, total phenolic, and flavonoid content. Plants, 9(7), 916. https://doi.org/10.3390/plants9070916
• Sobukola, O. P., Dairo, O. U., Sanni, L. O., Odunewu, A. V., & Fafiolu, B. O. (2007). Thin layer drying process of some leafy vegetables under open sun. Food Science and Technology International, 13(1), 35-40. https://doi.org/10.1177/1082013207075953
• Teisson, C. (1979). Le brunissement interne de l'ananas. I. Historique. Ii. Matériel et méthodes. Fruits 34(4), 245-261.
• Teixeira, B., Marques, A., Ramos, C., Serrano, C., Matos, O., Neng, N. R., Nogueira J. M. F., Saraivab, J. A., & Nunes, M. L. (2013). Chemical composition and bioactivity of different oregano (Origanumvulgare) extracts and essential oil. Journal of the Science of Food and Agriculture, 93(11), 2707-2714. https://doi.org/10.1002/jsfa.6089
• Thuy, N. M., Giau, T. N., Tai, N. V., & Minh, V. Q. (2023). Drying kinetics and mathematical modeling of dried macaroni supplemented with Gac aril. Revista Mexicana de Ingeniería Química, 22(3), Alim23103. https://doi.org/10.24275/rmiq/Alim23103
• Thuy, N. M., Hiep, L. H., Tai, N. V., Huong, H. T. T., & Minh, V. Q. (2022). Impact of drying temperatures on drying behaviors, energy consumption, and purple sweet potato flour quality. Acta Sci. Pol. Technol. Aliment., 21(4), 379-387. https://doi.org/10.17306/J.AFS.2022.1061
• Thuy, N. M., Minh, V. Q., Ha, H. T. N., & Tai, N. V. (2021). Impact of different thin layer drying temperatures on the drying time and quality of butterfly pea flowers. Food Research, 5, 197-203. https://doi.org/10.26656/fr.2017.5(6).328
• Thuy, N. M., Tram, N. B., Cuong, D. G., An, L. T., Duy, H. K. & Tai, N. V. (2023). Mathematical modelling of Roselle seeds (Hibiscus sabdariffa) drying kinetic. Food Research, 7(4), 84-90. https://doi.org/10.26656/fr.2017.7(4).121
• Tlatelpa-Becerro, A., Rico-Martínez, R., Cárdenas-Manríquez, M., Urquiza, G., Castro-Gómez, L. L., Alarcón-Hernández, F. B., & Montiel, E. (2022). Drying kinetics of Cecina from Yecapixtla using a forced flow indirect solar dryer. Revista Mexicana de Ingeniería Química, 21(2), Alim2750. http://doi.org/10.24275/rmiq/Alim2750
• Tortoe, C., Akonor, P. T., & Buckman, E. S. (2017). Potential uses of sweet potato – Composite flour in the pastry industry based on proximate composition, physicochemical, functional, and sensory properties of flour pastry products. Journal of Food Processing and Preservation, 41(5), 13206. https://doi.org/10.1111/jfpp.13206
• Wang, C., Dong, Y., Cheng, H., He, Y., Ye, J., & Zhou, H. (2013). Physicochemical properties of lacquer berries and decolorization of lacquer wax by physical adsorption and UV irradiation. Advances in Biological Chemistry, 3, 329-337. https://doi.org/10.4236/abc.2013.33037
• Zhang, M., Bhandari, B., & Fang, Z. (2017). Advances in Drying Science and Technology: Handbook of Drying of Vegetables and Vegetable Products (Eds.). CRC Press. Taylor & Francis Group, UK.
• Zujko, M. E., & Witkowska, A. M. (2023). Dietary antioxidants and chronic diseases. Antioxidants, 12(2), 362. https://doi.org/10.3390/antiox12020362