The Effects of Pretreatment on the Qualities of Sweet Potato Flour ? A Review

References

[1] Adeleke R. O. and Odedeji J. O. (2010). Functional properties of wheat and sweet potato flour blends. Pakistan Journal of Nutrition, vol. 9, no. 6, pp. 535–538

[2] Ade-Omowaye, B. I. O.,. Angersbach A, Taiwo K. A. and Knorr D. (2001). Use of pulsed electric field pre treatment to improve dehydration characteristics of plant based foods. Trends in Food Science & Technology 12 (8):285–295.

[3] Adewumi, M. O. and Adebayo, F. A. (2008). Profitability and Technical Efficiency of Sweet Potato Production in Nigeria. Journal of Rural Development, 31(5), 105–120.

[4] Ahmed M., Akter M. S., Eun J. B. (2010). Peeling, drying temperatures, and sulphite-treatment affect physicochemical properties and nutritional quality of sweet potato flour. Food Chemistry. 2010;12:112-118.

[5] Ahmed, I., Qazi I. M., and Jamal S. (2016). Developments in osmotic dehydration technique for the preservation of fruits and vegetables. Innovative Food Science & Emerging Technologies 34:29–43.

[6] Aina A. J., Falade K. O., Akingbala J. O., Titus P. (2009). Physico-chemical properties of twenty one Caribbean sweet potato cultivars. International Journal of Food Science Technology. 44:1696-1704.

[7] Ajayi, A. (2020). Effects of pre-treatment on the proximate composition and functional properties of plantain (Musa Parasidica) flour. International Journal of Research Publication, vol. 1, no. 8, 2020.

[8] Alam M., Rana Z., and Islam S. (2016). Comparison of the proximate composition, total carotenoids and total polyphenol content of nine orange-fleshed sweet potato varieties grown in Bangladesh. Foods, vol. 5, no. 4.

[9] Albertos, I., Martin-Diana A. B., Sanz M. A., Barat J. M., Diez A. M., Jaime I., and Rico D. (2016). Effect of high pressure processing or freezing technologies as pretreatment in vacuum fried carrot snacks. Innovative Food Science & Emerging Technologies 33:115–122.

[10] Allen J. C., Corbitt A. D., Maloney K. P., Butt M. S. & Truong V. D. ( 2012). Glycemic index of sweet potato as affected by cooking methods. The Open Nutrition Journal 6, 1−11.

[11] Alvarez-Arenas, T. E. G. (2010). Simultaneous determination of the ultrasound velocity and the thickness of solid plates from the analysis of thickness resonances using air-coupled ultrasound. Ultrasonics 50 (2):104–109.

[12] Al-Khuseibi, M. K., Sablani S. S., and Perera C. O. (2005). Comparison of water blanching and high hydrostatic pressure effects on drying kinetics and quality of potato. Drying Technology 23 (12):2449–2461.

[13] Amami, E., Khezami L., Vorobiev E., and Kechaou N. (2008). Effect of pulsed electric field and osmotic dehydration pretreatment on the convective drying of carrot tissue. Drying Technology 26 (2):231–238.

[14] Amami, E., Vorobiev E., and Kechaou N. (2005). Effect of pulsed electric field on the osmotic dehydration and mass transfer kinetics of apple tissue. Drying Technology 23 (3):581–595.

[15] Ando, Y., Maeda Y., Mizutani K., Wakatsuki N., Hagiwara S., and Nabetani H. (2016). Impact of blanching and freeze-thaw pretreatment on drying rate of carrot roots in relation to changes in cell membrane function and cell wall structure. LWT – Food Science and Technology 71:40–46.

[16] Babajide, J. M., Obadina A. O., Oyewole O. B., and Ugbaka L. N. (2006). Microbial quality of dry yam ‘‘gbodo’’ parboiled with without adjuncts. African Journal of Biotechnology, 5: 278–281.

[17] Belie, N. D., Herppich W., and Baerdemaeker J. D. (2000). Turgor changes in red cabbage during mild heat treatment Turgor changes in red cabbage during mild heat treatment. Plant Biomechanics Conference 245– 253.

[18] Bello B. D. and Ekeh C. N. (2014). Proximate composition and functional properties of wheat, sweet potato, and hamburger bean flour blends. Global advertise of research. Journal of Food Science and Technology, vol. 3, no. 4, pp. 118–124, 2014.

[19] Berm_udez-Aguirre, D., and Barbosa-C_anovas G. (2016). Chapter 11: Impact of Sonication on Shelf Life, Sensory, and Nutritional Quality of Food. In Food Processing Technologies: Impact on product attributes, A. K. jaiswal edited 233–247. Boca Raton, Fl., USA: CRC Press.

[20] Cakmak, R. ¸ Tekeo_glu S.,O., Bozkır H., Erg€un A. R., and Baysal T. (2016). Effects of electrical and sonication pretreatments on the drying rate and quality of mushrooms. LWT – Food Science and Technology 69:197–202.

[21] Carranza-Concha, J., Benlloch M., Camacho M. M., and Martınez-Navarrete N. (2012). Effects of drying and pretreatment on the nutritional and functional quality of raisins. Food and Bioproducts Processing 90 (C2):243–248.

[22] Chandra S., Singh S., and Kumari D. (2015). Evaluation of functional properties of composite flours and sensorial attributes of composite flour biscuits. Journal of Food Science & Technology, vol. 52, no. 6, pp. 3681–3688, 2015.

[23] Chemat, F., Zill-e-Huma, and Khan M. K. (2011). Applications of ultrasound in food technology: processing, preservation and extraction. Ultrasonics Sonochemistry 18 (4):813–835.

[24] Chen X., Lu J., Li X. et al. (2017). Effect of blanching and drying temperatures on starch-related physicochemical properties, bioactive components and antioxidant activities of yam flours. Lebensmittel-Wissenschaft und -Technologie-Food Science and Technology, vol. 82, pp. 303–310.

[25] Cheng, L. S., Fang S., and Ruan M. L. (2015). Influence of blanching pretreatment on the drying characteristics of cherry tomato and mathematical modeling. International Journal of Food Engineering 11 (2):265–274.

[26] Ciurzy_nska, A., Kowalska H., Czajkowska K., and Lenart A. (2016). Osmotic dehydration in production of sustainable and healthy food. Trends in Food Science and Technology 50:186–192.

[27] Dawkins L. N, Lu J. Y. (1991). Physico-chemical properties and acceptability of flour prepared from microwave blanched sweet potatoes. Journal of Food Processing and Preservation 15:115-124.

[28] Dariusz Dziki (2020). Review Recent Trends in Pretreatment of Food before Freeze-Drying. Processes 2020, 8, 1661

[29] Degras, L., (2003). Sweet Potato The tropical Agriculturalist, Malaysia: Macmillan Published Limited.

[30] Doymaz, I. (2015). Hot-air drying and rehydration characteristics of red kidney bean seeds. Chemical Engineering Communications 203 (5):599–608.

[31] Doymaz, _I., and EOzdemir E. O. (2014). Effect of air temperature, slice thickness and pretreatment on drying and rehydration of tomato. International Journal of Food Science and Technology 49 (2):558–564.

[32] Esmaiili, M., Sotudehgharebagh R., Cronin K., Mae M., and Rezazadeh G. (2007). Grape drying: a review. Food Reviews International 23 (3):257–280.

[33] Evrendilek, G. A. (2016). Chapter 16: Pulsed Electric Field: Impact on Food Product Attributes. Food Processing Technologies: Impact on product attributes. 393–434. Boca Raton, Fl., USA: CRC Press.

[34] Fana Haile, Shimelis Admassu, and Abrehet Fisseha (2015). Effects of Pre-treatments and Drying Methods on Chemical Composition, Microbial and Sensory Quality of Orange-Fleshed Sweet Potato Flour and Porridge. American Journal of Food Science and Technology, vol. 3, no. 3 (2015): 82-88. doi: 10.12691/ajfst-3-3-5.

[35] Faridnia, F., Oey I., Burritt D., and Bremer P. (2015). Innovative approach to determine the effect of pulsed electric fields on the microstructure of whole potato tubers: use of cell viability, microscopic images and ionic leakage measurements. Food Research International 77:556–564.

[36] Filho, L. M., Frascareli E. C., and Mauro M. A. (2016). Effect of an edible pectin coating and blanching pretreatments on the air-drying kinetics of pumpkin (Cucurbita moschata). Food and Bioprocess Technology 9 (5):859–871.

[37] Fincan, M., and Dejmek P. (2002). In situ visualization of the effect of a pulsed electric field on plant tissue. Journal of Food Engineering 55 (3):223–230.

[38] Food and Agricultural Organisation (FAO), (2004). Food and Agricultural Organisation of the United Nations.Production Year Book. FAO Rome.Vol. 40: pp 307.

[39] Food and Agriculture Organization of the United Nations, 2017 FAOSTAT (2019) http://faostat.fao.org/site/567/default. aspxancor

[40] Food and Agriculture Organization (FAO) (1990). Action Programme for the Prevention of Food Losses, Improving Post-Harvest Handling, Storage and Processing of Root and Tuber Crops, Rome.

[41] Fukumoto, L. and Mazza, G. (2000). Assessing Antioxidant and Prooxidant Activity of Phenolic Compounds. Journal of Agricultural and Food Chemistry, 48, 3597-3604. http://dx.doi.org/10.1021/jf000220w. 230

[42] Garcıa-martınez, E., Igual M., Mart-ınesparza M. E., and Mart_ıneznavarrete N. (2013). Assessment of the bioactive compounds, color, and mechanical properties of apricots as affected by drying treatment. Food & Bioprocess Technology 6 (11):3247–3255.

[43] Geu Cleu, K., Altun M., EOzyeurek M,. Karademir S. E, and Apak R.. (2006). Antioxidant capacity of fresh, sun- and sulphited-dried Malatya apricot (Prunus armeniaca) assayed by cuprac, abts/teac and folin methods. International Journal of Food Science and Technology 41 (Supplement s1):76–85.

[44] Girma G., Bultosa G., and Abera S. (2015). Effect of cassava (Manihot esculenta Crantz) variety, drying method, and blending ratio on the proximate composition and sensory properties of cassava-wheat composite bread. European. Journal of Food Science and Technology, vol. 3, no. 4, pp. 41–54, 2015.

[45] Grncarevic, M., and Hawker J. S. (2010). Browning of sultana grape berries during drying. Journal of the Science of Food & Agriculture 22 (5):270– 272.

[46] Guida, V., Ferrari G. Pataro G., Chambery A., Maro A. D., and Parente A. (2013). The effects of ohmic and conventional blanching on the nutritional, bioactive compounds and quality parameters of artichoke heads. LWT – Food Science and Technology 53 (2):569–579.

[47] Gunes, G., Blum L. K.and Hotchkiss J. H. (2005). Inactivation of yeasts in grape juice using a continuous dense phase carbon dioxide processing system. Journal of the Science of Food & Agriculture 85 (14):2362–2368.

[48] Hiranvarachat, B., Devahastin S., and Chiewchan N. (2011). Effects of acid pretreatments on some physicochemical properties of carrot undergoing hot air drying. Food and Bioproducts Processing 89 (2):116–127.

[49] Hong, Z., and Lu H. (2012). Effect of microwave pretreatment on the kinetics of ascorbic acid degradation and peroxidase inactivation in different parts of green asparagus (Asparagus officinalis L.) during water blanching. Food Chemistry 128 (4):1087–1093.

[50] Hulle, N. R. S., and Rao P. S. (2015). Effect of high pressure pretreatments on structural and dehydration characteristics of aloe vera (Aloe barbadensis Miller) cubes. Drying Technology 34 (1):105–118.

[51] Idowu O., Olaoye O., Sogotemi C. and Ajayi B. (2013). Quality assessment of flours and amala produced from three varieties of sweet potato ipomeabatatas. International Journal of Food and Nutritional Sciences, vol. 2, no. 4, pp. 2320–7876, 2013.

[52] Jakob, A., Bryjak J., _Ojtowicz H. W, Illeova V., Annus J., and Polakovic M. (2010). Inactivation kinetics of food enzymes during ohmic heating. Food Chemistry 123 (2):369–376.

[53] Jangam, S. V. (2011). An overview of recent developments and some R & D challenges related to drying of foods. Drying Technol. 29:1343–1357.

[54] Japanese Society of Root and Tuber Crops (JRT). (2000). Sweet potato in Japan. Retrieved June 19, 2007.

[55] Jayaraman, K. S., and Gupta D. K. D. (2006). Drying of fruits and vegetables. In Handbook of Industrial Drying A. S., Mujumdar (Ed.), (3rd edition) (pp. 606–634). UK: Taylor & Francis.

[56] Jermann, C., Koutchma T., Margas E., Leadley C., and Ros-Polski V. (2015). Mapping trends in novel and emerging food processing technologies around the world. Innovative Food Science & Emerging Technologies 31:14–27.

[57] Jiang, N., Liu, C. Li, D. and Zhou Y. (2015). Effect of blanching on the dielectric properties and microwave vacuum drying behavior of Agaricus bisporus slices. Innovative Food Science & Emerging Technologies 30:89–97.

[58] Jigar B. Panchal, Champawat P. S., Mudgal V. D. and Jain S. K. (2022). Effect of pretreatments and temperature on chemical properties of sweet potato flour. International Journal of Advanced Chemistry Research 2022; 4(2): 41-46

[59] Kamiloglu, S., Toydemir G., Boyacioglu D., Beekwilder J., Hall R. D., and Capanoglu E. (2016). A review on the effect of drying on antioxidant potential of fruits and vegetables. Critical Reviews in Food Science and Nutrition 56 (sup1):110–129.

[60] Kassali, R. (2011). Economics of sweet potato production: International Journal of Vegetable School 1(1): 313-32

[61] Knorr, D., Froehling A., Jaeger H., Reineke K., Schlueter O., and Schoessler K. (2011). Emerging technologies in food processing. Food Science and Technology 2 (2):203–35.

[62] Koskiniemi, C. B., Truong V. D., Simunovic J., and Mcfeeters R. F. (2011). Improvement of heating uniformity in packaged acidified vegetables pasteurized with a 915 MHz continuous microwave system. Journal of Food Engineering 105 (1):149–160.

[63] Krokida, M. K., Kiranoudis C. T., Maroulis Z. B., and Marinos-Kouris D. (2000). Effect of pretreatment on color of dehydrated products. Drying Technology 18 (6):1239–1250.

[64] Kulshrestha, S. A., and Sastry S. K. (2006). Low-frequency dielectric changes in cellular food material from ohmic heating: effect of end point temperature. Innovative Food Science&Emerging Technologies 7 (4):257–262.

[65] Lebovkaa, N. I., Shynkaryka N. V., and Vorobieva E. (2007). Pulsed electric field enhanced drying of potato tissue. Journal of Food Engineering 78 (2):606–613.

[66] Lee, C. Y., Bourne M. C., and Buren J. P. (2006). Effect of blanching treatment on the firmness of carrots. Journal of Food Science 44 (2):615–616.

[67] Lewicki P. P. (1999). Effect of pre-drying treatment, drying and rehydration on plant tissue properties: a review, International Journal of Food Properties, vol. 1, no. 1, pp. 1–22, 1998

[68] Li, X., and Farid M. (2016). A review on recent development in non-conventional food sterilization technologies. Journal of Food Engineering 182:33–45.

[69] Li-Zhen Deng, Arun S. Mujumdar, Qian Zhang, Xu-Hai Yang, Jun Wang, Zhi- An Zheng, Zhen-Jiang Gao and Hong-Wei Xiao (2017): Chemical and physical pretreatments of fruits and vegetables: Effects on drying characteristics and quality attributes – a comprehensive review, Critical Reviews in Food Science and Nutrition, DOI: 10.1080/10408398.2017.1409192

[70] Liu G. R. and Liu M. B. (2003) Smoothed Particle Hydrodynamics: A Meshfree Particle Method, World Scientific, Singapore.

[71] Liu, P., Mujumdar A. S., Zhang M., and Jiang H. (2015). Comparison of three blanching treatments on the color and anthocyanin level of the microwave-assisted spouted bed drying of purple flesh sweet potato. Drying Technology 33 (1):66–71.

[72] Liu, Z., Song Y., Guo Y., Wang H. and Liu J. (2016). Optimization of pulsed electric field pretreatment parameters for preserving the quality of raphanus sativus. Drying Technology 34 (6):692–702.

[73] Lopez, A., Iguaz, A., Esnoz, A., & Virsed P. (2000). Thin-layer drying behaviour of vegetable wastes from wholesale market. Drying Technology 18:995–1006.

[74] Marczak Krochmal Barbara, Barbara Sawicka, Jacek Supski, Tomasz Cebulak & Katarzyna Paradowska (2014). Nutrition value of the sweet potato ( Ipomoea batatas (L.) Lam) cultivated in south – eastern Polish conditions. International Journal of Agronomy and Agricultural Research (IJAAR), Vol. 4, No. 4, p. 169-178.

[75] Melese A. D. and Keyata E. O. (2022). Impacts of Pretreatment Techniques on the Quality of Tuber Flours. The Scientific World Journal Volume 2022.

[76] Miranda, G., _ Berna A., Salazar D., and Mulet A.. (2009). Sulphur dioxide evolution during apricot storage. LWT-Food Science and Technology 42 (2):531–533.

[77] Mtunda, K., Chilosa, D., & Rwiza, E.(2001). Damage reduces shelf-life of sweet potato during marketing, in Fifth Triennial Congress of the African Potato Association, 28 May–2 June, 2000, Kampala, Uganda. African Crop Science Journal, 9:301. 232

[78] Mujumdar, A. S. (2006). Handbook of industrial drying. 3rd ed. Taylor & Francis Group, Boca Raton (USA): CRC Press.

[79] Mukherjee, S., and Chattopadhyay P. K. (2007). Whirling bed blanching of potato cubes and its effects on product quality. Journal of Food Engineering 78 (1):52–60.

[80] Ndangui C. B., Petit J., Gaiani C., Nzikou J. M. and Scher J. (2014). Impact of thermal and chemical pretreatments on physicochemical, rheological, and functional properties of sweet potato (Ipomea batatas Lam) flour. Food and bioprocess technology. 2014;7:3618-3628.

[81] Ndiaye, C., Xu, S. Y. and Wang Z. (2009). Steam blanching effect on polyphenoloxidase, peroxidase and colour of mango (Mangifera indica L.) slices. Food Chemistry 113 (1):92–95.

[82] Neves, F. I. G., Vieira M. C., and Silva C. L. M. (2012). Inactivation kinetics of peroxidase in zucchini (Cucurbita pepo, L.) by heat and UV-C radiation. Innovative Food Science & Emerging Technologies 13 (1):158–162.

[83] Ngamwonglumlert, L., Devahastin S., and Chiewchan N. (2015). Natural colorants: pigment stability and extraction yield enhancement via utilization of appropriate pretreatment and extraction methods. Critical reviews in food science and nutrition 57 (15):3243–3259.

[84] Ngoma K., Mashau M. E., and Silungwe H. (2019). Physicochemical and functional properties of chemically pretreated Ndou sweet potato flour, International Journal of Food Science, vol. 2019,

[85] Nguyen, L. T., Choi W., Lee S. H., and Jun S.. (2013). Exploring the heating patterns of multiphase foods in a continuous flow, simultaneous microwave and ohmic combination heater. Journal of Food Engineering 116 (1):65 71.

[86] Nieto, A., Castro M. A., and Alzamora S. M. (2001). Kinetics of moisture transfer during air drying of blanched and/or osmotically dehydrated mango. Journal of Food Engineering 50 (3):175–185.

[87] Nu~nez-Mancilla, Y., Perez-Won M., Vega-G_alvez A., Arias V., Tabilo- Munizaga G., Briones-Labarca V., Lemus-Mondaca R., and Scala K. D. (2011). Modeling mass transfer during osmotic dehydration of strawberries under high hydrostatic pressure conditions. Innovative Food Science & Emerging Technologies 12 (3):338–343.

[88] Nungo, R.A. (2004). Nutritious Sweet Potato Recipes, Training Manual No.1 for Extension workers. Unpublished

[89] Obadina A., Ashimolowo H., and Olotu I. (2016). Quality changes in cocoyam flours during storage. Food Science & Nutrition, vol. 4, no. 6, pp. 818–827.

[90] Ofori G, Oduro I, Elis, H. K., & Dapaah. (2005). Assessment of vitamin A content and sensory attributes of new sweet potato (Ipomoea batatas) genotypes in Ghana. African Journal of Food Science 3, 184−192.

[91] Ojo M. O., Ariahu C. C. and Chinma E. C. (2017). Proximate, functional and pasting properties of cassava starch and mushroom (Pleurotus Pulmonarius) flour blends. American Journal of Food Technology, vol. 5, no. 1, p. 11, 2017.

[92] Oke M. O. & Workneh T. S. (2013). A review on sweet potato postharvest processing & preservation technology. African Journal of Agricultural Research Vol. 8(40), pp.4990- 5003, 17

[93] Olagunju T., Aregbesola O. A., and Akpan G. E. (2018). Effect of pre-treatment and temperature on the physical and functional properties of cocoyam flour in Proceedings of the 12th CIGR Section VI International Symposium, Ibadan, Nigeria, October 2018.

[94] Olatunde G. O, Henshaw F. O, Idowu M. A and Tomlins K. (2016). Quality attributes of sweet potato flour as influenced by variety, pretreatment and drying method. Food science & nutrition. 2016;4:623-635.

[95] Onwueme, I. C., and Charles,W. B. (1994). Tropical root and tuber crops, production, perspectives and future prospects. FAO Plant Production and ProtectionPaper, 126 1–228.

[96] Osundahunsi O. F., Fagbemi T. N., Kesselman E. and Shimoni E. (2003). Comparison of the physicochemical properties and pasting characteristics of flour and starch from red and white sweet potato cultivars,” Journal of Agricultural and Food Chemistry, vol. 51, no. 8, pp. 2232–2236.

[97] Padmaja G., Jaffer T. S. & Sajeev, M. S. (2012) . Food Uses and Nutritional Benefits of Sweet Potato. Fruit, Vegetable and Cereal. Science and Biotechnology 6 (Special Issue 1). 115- 123

[98] Pan, Z., Shih C., Mchugh T. H., and Hirschberg E. (2008). Study of banana dehydration using sequential infrared radiation heating and freeze-drying. LWT – Food Science and Technology 41 (10):1944–1951.

[99] Paniwnyk, L. (2016). Chapter 10: Application of Ultrasound to Aid Food Processing. Food Processing Technologies: Impact on product attributes, 207–227. Boca Raton, Fl., USA: CRC Press.

[100] Papathanasopoulos A. and Camilleri M. (2010). Dietary fiber supplements: effects in obesity and metabolic syndrome and relationship to gastrointestinal functions. Gastroenterology, vol. 138, no. 1, pp. 65–72, 2010.

[101] Pimpaporn, P., Devahastin S. and Chiewchan N. (2007). Effects of combined pretreatments on drying kinetics and quality of potato chips undergoing low-pressure superheated steam drying. Journal of Food Engineering 81 (2):318–329.

[102] Prain, G., Wheatley L. and Nguyen D. D. (1997). The potential of root crop processing for rural development in Vietnam. In: International Potato Center (CIP) Programme Report 1995-1996, Lima, Peru. International Potato Center.

[103] Raninen K., Lappi J., Mykkanen H., and Poutanen K., (2011). Dietary fiber type reflects physiological functionality: comparison of grain fiber, inulin, and polydextrose. Nutrition Reviews, vol. 69, no. 1, pp. 9–21, 2011.

[104] Rahath Kubra, I., Kumar D., and Jagan Mohan Rao L. (2016). Emerging Trends in Microwave Processing of Spices and Herbs. Critical reviews in food science and nutrition 56 (13):2160–2173.

[105] Ranganathan, K., Subramanian V., and Shanmugam N.(2015). Effect of thermal and nonthermal processing on textural quality of plant tissues. Critical Reviews in Food Science and Nutrition 56 (16):2665–2694.

[106] Rastogi, N. K. (2011). Opportunities and challenges in application of ultrasound in food processing. Critical Reviews in Food Science and Nutrition 51 (8):705–22.

[107] Rastogi, N. K. (2012). Recent trends and developments in infrared heating in food processing. Critical Reviews in Food Science and Nutrition 52 (9):737–760.

[108] Rastogi, N. K., Angersbach A., and Knorr D. (2000). Synergistic effect of high hydrostatic pressure pretreatment and osmotic stress on mass transfer during osmotic dehydration. Journal of Food Engineering 45 (1):25–31.

[109] Rees D., Kapinga R., Mtunda K., Chilosa D., Rwiza E., Kilima M., Kiozya H., & Munisi R., (2001). Damage reduces with market value and shelf life of sweet potato: a case study of urban markets in Tanzania. Tropical Science, 41:1-9

[110] Regier, M., and Schubert H. (2001). Microwave processing. In: P., Richardson (Ed.). Thermal Technologies in Food Processing (pp. 178–207). Cambridge, England: Woodhead Publishing Limited.

[111] Rodrigues, S., and Fernandes F. A. N. (2007). Use of ultrasound as pretreatment for dehydration of Melons. Drying Technology 25 (10):1791–1796.

[112] Rufus Rotimi Dinrifo. (2012). Effects of pre-treatments on drying kinetics of sweet potato slices. Agric Eng Int: CIGR Journal, 14(3): 136－145.

[113] Sakr, M., and Liu S.. (2014). A comprehensive review on applications of ohmic heating (OH). Renewable and Sustainable Energy Reviews 39:262–269.

[114] Salengke, S., and Sastry S. K.. (2005). Effect of ohmic pretreatment on the drying rate of grapes and adsorption isotherm of raisins. Drying Technology 23 (3):551–564.

[115] Sarkis, J. R., Jaeschke D. P., Tessaro I. C., and Marczak L. D. F. (2013). Effects of ohmic and conventional heating on anthocyanin degradation during theprocessing of blueberry pulp. LWT – Food Science and Technology 51 (1):79–85.

[116] Scheossler, K., Jeager H. and Knorr D. (2012). Effect of continuous and intermittent ultrasound on drying time and effective diffusivity during convective drying of apple and red bell pepper. Journal of Food Engineering 108 (1):103–110.

[117] Senadeera, W., B. Bhandari, G. Young, and B. Wijesinghe. (2000). Physical property changes of fruits and vegetables during hot air drying. Drying Technology in Agriculture and Food Sciences (edited by A.S. Mujumdar), :159–161. Enfield Science Publishers.

[118] Serratosa, M. P., Lopez-Toledano A., Medina M., and Merida J. (2008). Drying of Pedro Ximenez grapes in chamber at controlled temperature and with dipping pretreatments. Changes in the color fraction. Journal of

[119] Agricultural & Food Chemistry 56 (22):10739–46.

[120] Shirsat, N., Lyng J. G., Brunton N. P., and McKenna B. (2004). Ohmic processing: Electrical conductivities of pork cuts. Meat Science 67:507–514.

[121] Shyu, S. L., and Hwang L. S. (2001). Effects of processing conditions on the quality of vacuum fried apple chips. Food Research International 34 (3):133–142.

[122] Spigno G. (2016). Chapter 8: Microwave Processing: Impact on Food Product Quality Attributes. In Food Processing Technologies: Impact on product attributes A. K. jaiswal edited. 79–91. Boca Raton, Fl., USA: CRC Press.

[123] Sripinyowanich, J., and Noomhorm A. (2013). Effects of freezing pretreatment, microwave-assisted vibro-fluidized bed drying and drying temperature on instant rice production and quality. Journal of Food Processing & Preservation 37 (4):314–324.

[124] Tao, Y., and Sun D. W. (2015). Enhancement of food processes by ultrasound: a review. Critical Reviews in Food Science and Nutrition 55 (4):570–594.

[125] Tao, Y., Wang P., Wang Y., Kadam S. U., Han Y., Wang J. and Zhou J. (2016). Power ultrasound as a pretreatment to convective drying of mulberry (Morus alba L.) leaves: impact on drying kinetics and selected quality properties. Ultrasonics Sonochemistry 31:310–318.

[126] Tesniere, C., and Flanzy C. (2011). Carbonic maceration wines: characteristics and winemaking process. Advances in Food & Nutrition Research 63 (1):1–15.

[127] Toepfl, S., Heinz V., and Knorr D. (2005). Chapter 4: Overview of pulsed electric field processing for food. In Emerging Technologies for Food processing D. W., Sun edited, 69–97. London, UK: Elsevier.

[128] Tomlins, K. I., Ndunguru, G. T., Rwiza E., & Westby A. (2000). Post harvest handling, transport and quality of sweetpotato in Tanzania. Journal of Horticultural Science and Biotechnology., 75:586.

[129] Tsuda, T., Horio, F. and Osawa, T. (1998) Dietary Cyanidin 3-O-Beta-Dglucoside Increases ex Vivo Oxidation Resistance of Serum in Rats. Lipids, 33, 583-588.

[130] Ueno, S., Izumi T., and Fujii T. (2009). Estimation of damage to cells of Japanese radish induced by high pressure with drying rate as index. Bioscience Biotechnology and Biochemistry 73 (8):1699–1703.

[131] USDA (2009). US Department of Agriculture, Agricultural Research Service. National Nutrient Database for Standard Reference, Release 22. Nutrient Data Laboratory Home page.

[132] Vadivambal, R. and Jayas D.S. (2010). Non-uniform Temperature Distribution During Microwave Heating of Food Materials—A Review. Food and Bioprocess Technology, 2010. 3(2): p. 161-171.

[133] Van Hal, M. (2000). Quality of sweet potato flour during processing and storage. Journal of Food Reviews International 16 (16):1–37.

[134] Vasquez-Parra, J. E., Ochoa-Martınez C. I., and Bustos-Parra M. (2014). Effect of chemical and physical pretreatments on the convective drying of Cape gooseberry fruits (Physalis peruviana). Journal of Food Engineering 119 (3):648–654.

[135] Varghese, K. S., Pandey M. C., Radhakrishna K., Bawa A. S. (2014). Technology, applications and modelling of ohmic heating: a review. Journal of Food Science and Technology 51 (10):2304–2317.

[136] Vega-G_alvez, A., Uribe E., Perez M., Tabilo-Munizaga G., Vergara J., Garcia-Segovia P., Lara E., and Scala K. D. (2011). Effect of high hydrostatic pressure pretreatment on drying kinetics, antioxidant activity, firmness and microstructure of aloe vera (Aloe barbadensis Miller) gel. LWT – Food Science and Technology 44 (2):384–391.

[137] Verma, D., Kaushik N. and Rao P. S. (2014). Application of high hydrostatic pressure as a pretreatment for osmotic dehydration of banana slices (Musa cavendishii) finish-dried by dehumidified air drying. Food and Bioprocess Technology 7 (5):1281–1297.

[138] Wiktor, A.,_Sledz M., Nowacka M., Chudoba T., and Witrowa-Rajchert D. (2014). Pulsed electric field pretreatment for osmotic dehydration of apple tissue: experimental and mathematical modeling studies. Drying

[139] Technology 32 (2):408–417.

[140] Woolfe J. A., (2003) Sweetpotato: An untapped food resource. Cambridge University Press, Cambridge, UK.

[141] Xiao, H. W., Pan Z., Deng L. Z., El-Mashad H. M., Yang X. H., Mujumdar A. S., Gao Z. J., and Zhang Q. (2017). Recent developments and trends in thermal blanching – a comprehensive review. Information Processing in Agriculture 4 (2):101–127.

[142] Yucel, U., Alpas H., and Bayindirli A. (2010). Evaluation of high pressure pretreatment for enhancing the drying rates of carrot, apple, and green bean. Journal of Food Engineering 98 (2):266–272.

[143] Zareifard, M. R., Ramaswamy, H. S., Trigui, M. and Marcotte, M. (2003). Ohmic heating behaviour and electrical conductivity of two-phase food systems. Innovative Food Science and Emerging Technolgies 4: 45-55

[144] Zhao, H. Y., Fang X. M., Wang J., Ju H. Y., Zhang Y., Chen X., Zhang Q., Liu Y. H., Gao Z. J. and Xiao H. W. (2016). Effect of ethanol dipping pretreatment on drying characteristics and quality of eggplant slices. Transactions of the Chinese Society of Agricultural Engineering 32 (9):233–240 (in Chinese with English abstract).

[145] Zhu F. (2014). Structure, physicochemical properties, modifications, and uses of sorghum starch. Comprehensive Reviews in Food Science and Food Safety, vol. 13, no. 4, pp. 597–610, 2014.

[146] Zhu, Y. I., Pan Z., and Mchugh T. H. (2007). Effect of dipping treatments on color stabilization and texture of apple cubes for infrared dry-blanching process. Journal of Food Processing and Preservation 31 (5):632–648.

@article{1706217,
      author = {Ojoawo Olayemi Olubunmi, Adejumo Bolanle Adenike, Ocheme Ocheme Boniface, Olorunsogo Samuel T.},
      title = {The Effects of Pretreatment on the Qualities of Sweet Potato Flour ? A Review},
      journal = {Iconic Research And Engineering Journals},
      year = {2024},
      volume = {8},
      number = {2},
      pages = {789-806},
      issn = {2456-8880},
      url = {https://www.irejournals.com/formatedpaper/1706217.pdf},
      abstract = {Pretreatment is a process that is commonly applied before drying of agricultural products, it inactivates enzymes and improves quality of dried products while accelerating the drying process. This article aims to review the effects of different types of pretreatment on the quality of sweet potato flour. The methods of pretreatment frequently used for the processing of sweet potato prior to drying include Thermal blanching (Hot Water, Steam, Ohmic heater and Microwave), Non thermal blanching (Ultrasound, Freezer, Pulsed electric field and High hydrostatic pressure), Hyperosmotic solutions (Salt, Sugar), Alkaline liquor (Potassium Carbonate, Ethyl oleate solutions), Acid liquor (Citric Acid, Ascorbic Acid), Sulphite solution (Sulphur dioxide gas,  Water-soluble sulphide salts for example potassium metabisulphite (K2S2O5), sodium metabisulphite  (Na2S2O5)and sodium hydrogen sulphite (NaHSO3).) and Carbonic maseration (Carbon dioxide (CO2). Pretreatment has been proven to retain the colour of sweet potato, enhance nutritional qualities and also improve the functiomal characteristics of sweet potato flour.},
      keywords = {Blanching, Pretreatment, Sulphiting, Sweet potato, Quality},
      month = {August},
  }