Abstract
The content of nonhydratable phosphatides in soybean crude oil is increased by phospholipase D activity during the oil-making process. Enzyme inhibition would allow to minimize them. Recently harvested soybeans with high moisture levels require adequate drying to store safely. Simultaneous soybean drying and phospholipase D inactivation in a single operation when applying a thermal treatment by the fluidized-bed technique was evaluated. The process conditions for performing the drying and a complete enzyme inhibition on soybeans, with an initial moisture content between 7.4 and 20.6% wet basis, similar to that at the time of the harvest, were fluidizing and drying medium temperature between 110 and 140°C, and a drying time between 1 and 2 min. For the treated soybeans, the phosphorus content increased up to 223% in crude oil and decreased 17% in degummed crude oil with regard to the values of the control sample.
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References
Zhang, S., S.S. Koseoglu, and K.C. Rhee, Effects of Expander Process on the Phospholipids in Soybean Oil, J. Am. Oil Chem. Soc. 71:1145–1148 (1994).
Haraldsson, G., Degumming, Dewaxing and Refining, Ibid.251–256 (1983).
List, G.R., T.L. Mounts, and A.C. Lanser, Factors Promoting the Formation of Nonhydratable Soybean Phosphatides, Ibid.443–446 (1992).
Kock, M., Oilseed Pretreatment in Connection with Physical Refining, Ibid.198–202 (1983).
List, G.R., T.L. Mounts, A.C. Lanser, and R.K. Holloway, Effect of Moisture, Microwave Heating, and Live Steam Treatment on Phospholipase D Activity in Soybeans and Soy Flakes, Ibid.867–871 (1990).
Florin, G., and H.R. Bartesch, Processing of Oilseeds Using Fluidbed Technology, Ibid.193–199 (1983).
Tosi, E., M. Tamburelli, and R. Prado, Cinética del secado de soja (Glycine max), Ecuación empírica para el secado en lecho fluidizado, Rev. Agroquím. Tecnol. Aliment. 30:130–137 (1990).
Osella, O., R. Gordo, R. González, E. Tosi, and E. Ré, Soybean Heat-Treated Using a Fluidized Bed, Lebensm. Wiss. Technol. 30:676–680 (1998).
International Organization for Standardization, Geneva, Switzerland, 1977.
British Standards, Liverpool, England, 1987.
AOAC, Official Methods of Analysis, 12th edn., Association of Official Analytical Chemists, Washington, DC.
Tosi, E.A., A.F. Cazzoli, and L.M. Tapiz, Phosphorus in Oil. Production of Molybdenum Blue Derivative at Ambient Temperature Using Non-Carcinogenic Reagents, J. Am. Oil Chem. Soc. 75:41–44 (1998).
Nakayama, K., K. Saio, and M. Kito, Decomposition of Phospholipids in Soybean During Storage, Cereal Chem. 58:260–264 (1981).
Bergmayer, H.U., and K. Gawehn, Enzymes as Biochemical Reagents, Methods of Enzymatic Analysis, 2nd edn., Academic Press, New York, 1974, Vol. I, p. 504.
Cheftel, J.C., J.L. Cuq, and D. Lorient, Aminoácidos, péptidos y proteínas, in Química de los Alimentos, edited by O. Fennema, Acribia SA, Zaragoza, Spain, 1993, p. 388.
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Tosi, E.A., Cazzoli, A., Ré, E. et al. Soybean drying in fluidized bed. effect on the hydratable and nonhydratable phosphatide concentration in crude and degummed crude oil. J Amer Oil Chem Soc 76, 1467–1470 (1999). https://doi.org/10.1007/s11746-999-0186-0
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DOI: https://doi.org/10.1007/s11746-999-0186-0