Abstract
Beets contain the red and yellow pigments known as betalains, as well as nitrates and other phytochemicals that may affect human health, and have been studied for possible effects on lowering blood pressure and enhancing athletic performance. Betalains are heat-labile, so developing relatively low-temperature drying methods is one way to turn the perishable root vegetable into a value-added ingredient. The objective of this study was to determine if continuous vacuum belt drying (VBD) could be used to produce powdered ingredients with good color, physical properties, and retention of betalains. Drying studies showed that drying rate could be increased somewhat by increasing temperatures from 75 to 95 °C, with drying times ranging from 160 to 115 min. Drying times were substantially shorter than for powders produced by freeze drying (FD) (26 h) or hot air drying (HAD) (~ 6 h). Properties such as flowability or color did not depend on drying temperature. VBD beet powders had a red-purplish color that was slightly darker (L* = 25.74) than for freeze-dried powders (L* = 38.92). In contrast, HAD samples were much darker than VBD or FD powders, and showed signs of browning. Flowability was improved by the addition of maltodextrins, but at the expense of some increase in drying time. VBD powders were less hygroscopic than FD powders, but reached the same final moisture content. HAD powders were less hygroscopic. VBD samples had slightly lower betalain levels (261–273 mg betanin/g dry beet) than FD powders (291.2 mg betanin/g dry beet). Both had much greater levels than HAD powders (127.8 mg betanin/g dry beet). Powder dried at 95 °C without maltodextrin was optimal as it dried most quickly and had minimal betalain loss.
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References
Abadio, F. D. B., Domingues, A. M., Borges, S. V., & Oliviera, V. M. (2004). Physical properties of powdered pineapple (Ananas comsus) juice effect of maltodextrin concentration and atomization speed. Journal of Food Engineering, 64, 285–287.
Ahmad, S., Yaghmaee, P., & Durance, T. (2012). Optimization of dehydration of lactobacillus salivarius using radiant energy vacuum. Food and Bioprocess Technology, 5, 1019–1027.
Antigo, J. L. D., Bergamasco, R. D. C., & Madrona, G. S. (2018). Effect of pH on the stability of red beet extract (Beta vulgaris l.) microcapsules produced by spray drying or freeze drying. Food Science and Technology, 38, 72–77.
Azeredo, H. M. C. (2009). Betalains: properties, sources, applications, and stability- a review. International Journal of Food Science and Technology, 44, 2365–2376.
Cai, Y. Z., & Corke, H. (2000). Production and properties of spray-dried Amaranthus betacyanin pigments. Journal of Food Science, 65, 1248–1252.
Catelam, K. T., Trindade, C. S. F., & Romero, J. T. (2011). Water adsorption isotherms and isosteric sorption heat of spray-dried and freeze-dried dehydrated passion fruit pulp with additives and skimmed milk. Ciência e Agrotecnologia, 35, 1196–1203.
Doulia, D., Tzia, K., & Gekas, V. (2000). A knowledge base for the apparent mass diffusion coefficient (Deff) of foods. International Journal of Food Properties, 3, 1–14.
Francis, F. J. (1999). Anthocyanins and betalains. In F. J. Francis (Ed.), Colorants (pp. 280–309). St. Paul: Eagen Press.
Goula, A. M., Adamopoulos, K. G., & Kazakis, N. A. (2004). Influence of spray drying conditions on tomato powder properties. Drying Technology, 22, 1129–1151.
Grabowski, J. A., Truong, V.-D., & Daubert, C. R. (2006). Spray-drying of amylase hydrolyzed sweetpotato puree and physicochemical properties of powder. Journal of Food Science, 71, E209–E217.
Herbach, K. M., Stinzing, F. C., & Carle, R. (2004). Impact of thermal treatment on color and pigment pattern of red beet (Beta vulgaris L.) preparations. Journal of Food Science, 69, C491–C498.
Janiszewska, E. (2014). Microencapsulated beetroot juice as a potential source of betalain. Powder Technology, 264, 190–196.
Jaya, S., & Das, H. (2004). Effect of maltodextrin, glycerol monostearate and tricalcium phosphate on vacuum dried mango powder properties. Journal of Food Engineering, 63, 125–134.
Kaimainen, M., Laaksonen, O., Järvenpää, E., Sandell, M., & Huopalahti, R. (2015). Consumer acceptance and stability of spray dried betanin in model juices. Food Chemistry, 187, 398–406.
Kim, M., & Kerr, W. L. (2012). Vacuum-belt drying of rabbiteye blueberry slurries: influence of drying conditions on physical and quality properties of blueberry powder. Food and Bioprocess Technology, 6, 3227–3237.
Kujala, T. S., Loponen, J. M., Klika, K. D., & Pihlaja, K. (2000). Phenolics and betacyanins in red beetroot (Beta vulgaris) root: distribution and effect of cold storage on the content of total phenolics and three individual compounds. Journal of Agricultural and Food Chemistry, 48, 5338–5342.
Li, J. M., Ge, C. X., Xu, M. X., Wang, W., Yu, R., Fan, C. Y., & Kong, L. D. (2015). Betaine recovers hypothalamic neural injury by inhibiting astrogliosis and inflammation in fructose-fed rats. Molecular Nutrition & Food Research, 59, 189–202.
Liu, X., Qiu, Z., Wang, L., & Chen, Y. (2011). Quality evaluation of Panax notoginseng extract dried by different drying methods. Food and Bioproducts Processing, 89, 10–14.
Mathlouthi, M., & Roge, B. (2003). Water vapor sorption isotherms and the caking of food powders. Food Chemistry, 82, 61–71.
Moraga, G., Martínez-Navarrete, N., & Chiralt, A. (2006). Water sorption isotherms and phase transitions in kiwifruit. Journal of Food Engineering, 72, 147–156.
Muggeridge, D. J., Howe, C. C., Spendiff, O., Pedlar, C., James, P. E., & Easton, C. (2014). A single dose of beetroot juice enhances cycling performance in simulated altitude. Medicine & Science in Sports & Exercise, 46, 143–150.
Murphy, M., Eliot, K., Heuertz, R. M., & Weiss, E. (2012). Whole beetroot consumption acutely improves running performance. Journal of the Academy of Nutrition and Dietetics, 112, 548–552.
Musielak, G., & Kieca, A. (2014). Influence of varying microwave power during microwave–vacuum drying on the drying time and quality of beetroot and carrot slices. Drying Technology, 32, 1326–1333.
Nemzer, B., Pietrzkowski, Z., Sporna, A., Stalica, P., Thresher, W., Michalowski, T., & Wybraniec, S. (2011). Betalainic and nutritional profiles of pigment-enriched red beet root (Beta vulgaris L.) dried extracts. Food Chemistry, 127, 42–53.
Pedreno, M. A., & Escribano, J. (2001). Studying the oxidation and the antiradical activity of betalain from beetroot. Journal of Biological Education, 35, 49–51.
Piatelli, M. (1981). The betalains: structure, biosynthesis, and chemical taxonomy. In P. K. Stumpf & E. E. Conn (Eds.), The biochemistry of plants: a comprehensive treatise (pp. 557–575). New York: Academic Press.
Reis, F. R. (2014). Vacuum drying for extending food shelf-life. Switzerland: Springer International Publishing.
Quek, SY., Chok, NK., Swedlund, P. (2007) The physicochemical properties of spray-dried watermelon powders. Chemical Engineering and Processing: Process Intensification, 46, (5):386–392.
Rodríguez-Hernández, G. R., Gonzalez-Garcia, R., Grajales-Lagunes, A., Ruiz-Cabrera, M. A., & Abud-Archila, M. (2005). Spray-drying of cactus pear juice (Opuntia streptacantha): effect on the physicochemical properties of powder and reconstituted product. Drying Technology, 23, 955–973.
Šaponjac, T. V., Čanadanović-Brunet, J., Ćetković, G., Jakišić, M., Djilas, S., Vulić, J., & Stajčić, S. (2016). Encapsulation of beetroot pomace extract: RSM optimization, storage and gastrointestinal stability. Molecules, 21, 584600.
Serris, G. S., & Biliaderis, C. G. (2001). Degradation kinetics of beetroot pigment encapsulated in polymeric matrices. Journal of the Science of Food and Agriculture, 81, 691–700.
Siervo, M., Lara, J., Ogbonmwan, I., & Mathers, J. C. (2013). Inorganic nitrate and beetroot juice supplementation reduces blood pressure in adults: a systematic review and meta-analysis. Journal of Nutrition, 143, 818–826.
Tonon, R. V., Brabet, C., & Hubinger, M. D. (2009). Influence of drying air temperature and carrier agent concentration on the physicochemical properties of açai juice powder. Food Science and Technology, 29, 444–450.
von Elbe, J.H. (2001). Betalains. Current Protocols in Analytical Chemistry. 1, F.3.1.1–7.
Wang, J., Li, Y. Z., Chen, R. R., Bao, J. Y., & Yang, G. M. (2007). Comparison of volatiles of banana powder dehydrated by vacuum belt drying, freeze-drying, and air-drying. Food Chemistry, 104, 1516–1521.
Webb, A. J., Patel, N., Loukogeorgakis, S., Okorie, M., Aboud, Z., Misra, S., & MacAllister, R. (2008). Acute blood pressure lowering, vasoprotective, and antiplatelet properties of dietary nitrate via bioconversion to nitrite. Hypertension, 51, 784–790.
Wilkerson, D. P., Hayward, G. M., Bailey, S. J., Vanhatalo, A., Blackwell, J. R., & Jones, A. M. (2012). Influence of acute dietary nitrate supplementation on 50 mile time trial performance in well-trained cyclists. European Journal of Applied Physiology, 112, 4127–4134.
Xu, S., Pegg, R. B., & Kerr, W. L. (2016). Physical and chemical properties of vacuum belt dried tomato powders. Food and Bioprocess Technology, 9, 91–100.
Yan, H. (2012). Vacuum belt dried apple pomace powder as a value-added ingredient. MS Thesis. Department of Food Science and Technology, University of Georgia, Athens, GA.
Zhou, X., Xu, R., Zhang, B., Pei, S., Liu, Q., Ramaswamy, H. S., & Wang, S. (2018). Radio frequency-vacuum drying of kiwifruits: kinetics, uniformity, and product quality. Food and Bioprocess Technology, 11, 2094–2109.
Zielinska, M., Zielinska, D., & Markowski, M. (2018). The effect of microwave-vacuum pretreatment on the drying kinetics, color and the content of bioactive compounds in osmo-microwave-vacuum dried cranberries (Vaccinium macrocarpon). Food and Bioprocess Technology, 11, 585–602.
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Kerr, W.L., Varner, A. Vacuum Belt Dehydration of Chopped Beetroot (Beta vulgaris) and Optimization of Powder Production Based on Physical and Chemical Properties. Food Bioprocess Technol 12, 2036–2049 (2019). https://doi.org/10.1007/s11947-019-02351-6
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DOI: https://doi.org/10.1007/s11947-019-02351-6