American Journal of Food Technology1557-45711557-458XAcademic Journals Inc.10.3923/ajft.2011.63.71AbeS. TakimotoS. YamamuroY. TauK. TakenagaF. SuzukiK. OdaM. 1201161The effects of high-pressure and heat pretreatments, used prior to drying, on the rehydration rate and quality of sweet potato was investigated. Sweet potato was pressurized at 200 Mpa for 5 min and heat treatment was performed at 100°C for 5 min. Three different types of pretreatments were performed: heat treatment, heat treatment after high-pressure treatment and high-pressure treatment after heat treatment. There were no differences in the color parameters (L*, C* and h) and gelatinization rate of rehydrated sweet potato exposed to the three different pretreatments. However, heat treatment after high-pressure treatment resulted in pronounced texture improvement compared to the other pretreatments. The relative hardness of the rehydrated sweet potato exposed to heat treatment after high-pressure treatment was higher than with the other pretreatments. Furthermore, it was found that the rehydration rate of sweet potato exposed to heat treatment after high-pressure treatment was lower than either heat treatment or high-pressure treatment after heat treatment. Heat treatment after high-pressure treatment prior to drying prevented cubes of sweet potato from collapsing during rehydration. This study shows that in sweet potato, the use of heat treatment after high-pressure treatment prior to drying could serve as an effective method for texture improvement.]]>Al-Khuseibu, M.K., S.S. Salblani and C.O. Perera,20052324492461Anjum, N., M. Tariq and L. Asia,2006Mangifera indica) stored at low temperature.]]>15258Balasubramaniam, V.M., F. Daniel and T.J. Evan,2008623238Basak, S. and H.S. Ramaswamy,199829587601Bauer, B.A. and D. Knorr,200568329334Brewer, M.S., S. Begum and A. Bozemann,199518479493Butz, P., R. Edenharder, F.A. Garcia, H. Fister, C. Merkel and B. Tauscher,200235295300Cheftel, J.C.,19921992pp: 195-209pp: 195-209Dietrich, W.C., F.E. Lindquist, G.S. Bohart and N.M. Hutting,195520489491Eshtiaghi, M.N., R. Stute and D. Knorr,19945911681170Euclides, J.L., A.N. Valdir and A.D.S. Maraiza,199240:23692373Greve, L.C., K.A. Shackel, H. Ahmadi, R.N. McArdle, J.R. Gohlke and J.M. Labavitch,19944228962899Heremans, K.,19951995pp: 81-97pp: 81-97Hite, B.H.,1899581535Hugas, M., M. Garriga and J.M. Monfort,200362359371Kilara, A., M. Witowski, J. Mccord, R. Beelman and G. Kuhn,19848114Krokida, M.K. and C. Philippopoulos,200523799830Lewicki, P.P. and J. Wiczlowska,20069217226Ng, A. and K.W. Waldron,1997Solanum tuberosum Cv. Bintje) in relation to firmness.]]>4534113418Rastogi, N.K., A. Angersbach, K. Niranjan and D. Knorr,200065838841Rahman, M.S. and C.O. Perera,19991999pp: 173-216pp: 173-216Sila, D.N., C. Smout, F. Elliot, A. Van Loey and M. Hendrickx,200671E1E9Singh, S., C.S. Raina, A.S. Bawa and D.C. Saxena,20062414871494Smogyi, M.,19521951923Tauscher, B.,1995200313Thakur, B.R. and P.E. Nelson,199814427447Yang, J. and R.L. Gadi,2008Ipomoea batatas).]]>3224234