The critical water activity from dynamic dewpoint isotherms as an indicator of crispness in low moisture cookies

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• 作者：Brady P. Carter ; Mary T. Galloway…
• 关键词：Crispness ; Water activity ; Dynamic isotherms ; Stability ; Critical water activity ; Moisture sorption
• 刊名：Sensing and Instrumentation for Food Quality and Safety
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：9
• 期：3
• 页码：463-470
• 全文大小：746 KB
• 参考文献：1.G. Hough, Md Pilar-Buera, J. Chirife, O. Moro, J. Texture Stud. 32(1), 57 (2001)View Article
  2.M.C. Bourne, Effects of water activity on textural properties of food, in Water Activity: Theory and Applications to Food, ed. by L.B. Rockland, L.R. Beuchat (Academic press, New York, 1987), p. 75
  3.J.M. Arimi, E. Duggan, M. OΓ??Sullivan, J.G. Lyng, E.D. OΓ??Riordan, Food Res. Intl. 43, 1650 (2010)View Article
  4.J.F.V. Vincent, J. Sci. Food Agric. 78, 162 (1998)View Article
  5.S. Sahin, S.G. Sumnu, Physical Properties of Foods (Springer, New York, 2010)
  6.E.E. Katz, T.P. Labuza, J. Food Sci. 46, 403 (1981)View Article
  7.C.S. Gaines, P.L. Finney, A. Kassuba, Cereal Chem. 69, 115 (1992)
  8.E.M. Castro-Prada, C. Primo-Martin, M.B.J. Meinders, R.J. Hamer, Tv Vliet, J. Texture Stud. 40, 127 (2009)View Article
  9.S. Heidenreich, D. Jaros, H. Rohm, A. Ziems, J. Texture Stud. 35, 621 (2004)View Article
  10.R. Tesch, M.D. Normand, M. Peleg, J. Sci. Food Agric. 70, 347 (1996)View Article
  11.L. Slade, H. Levine, A Food Polymer Science Approach to Structure-Property Relationships in Aqueous Food Systems: Non-Equilibrium Behavior of Carbohydrate-Water Systems, in Water relationships in foods Advances in the 1980s and Trends for the 1990s, ed. by H. Levine, L. Slade (Wiley, New York, 1991), p. 29View Article
  12.G. Roudaut, Water Activity and Physical Stability, in Water Activity in Foods, ed. by G. Barbosa-Canovas, A.J. Fontana, S.J. Schmidt, T.P. Labuza (Iowa State Press, Ames, 2007), p. 199View Article
  13.M. Peleg, Biotechnol. Prog. 10, 385 (1994)View Article
  14.P. Pittia, M.C. Nicoli, G. Sacchetti, J. Texture Stud. 38, 116 (2007)View Article
  15.M. Harris, M. Peleg, Cereal Chem. 73, 225 (1996)
  16.L.N. Bell, T.P. Labuza, Moisture sorption: practical aspects of isotherm measurement and use (American Association of Cereal Chemists, St. Paul, 2000)
  17.T.P. Labuza, B. Altunakar, Water activity prediction and moisture sorption isotherms, in Water Activity in Foods, ed. by G. Barbosa-Canovas, A.J. Fontana, S.J. Schmidt, T.P. Labuza (Wiley, Ames, 2007), p. 109View Article
  18.B.P. Carter, A.J. Fontana, Dynamic Dewpoint Isotherm verses Other Moisture Sorption Isotherm Methods (Pullman, Decagon Devices, 2008)
  19.S.J. Schmidt, J.W. Lee, Int. J. Food Prop. 15, 236 (2012)View Article
  20.B.P. Carter, G.S. Campbell, Fundamentals of Moisture Sorption Isotherm (Decagon Devices Inc, Pullman, 2008)
  21.X. Yuan, B.P. Carter, S.J. Schmidt, J. Food Sci. 76, 78 (2011)View Article
  22.B.P. Carter, S.J. Schmidt, Food Chem. 132, 1693 (2012)View Article
  23.A. Savitsky, M.J.E. Golay, Anal. Chem. 36, 1627 (1964)View Article
  24.M.E. Zabik, S.G. Fierke, D.K. Bristol, Cereal Chem. 56, 29 (1979)
  25.Minitab Inc, Minitab 16 Statistical Software (Minitab Inc, State College, 2010)
  26.B.P. Carter, C.F. Morris, J.A. Anderson, Cereal Chem. 76, 907 (1999)View Article
  27.Y.H. Roos, Phase Transitions in Foods (Academic Press, San Diego, 1995)
  
• 作者单位：Brady P. Carter (1)
  Mary T. Galloway (1)
  Gaylon S. Campbell (1)
  Arron H. Carter (2)
  
  1. Decagon Devices, Inc, 2365 NE Hopkins Court, Pullman, WA, 99163, USA
  2. Washington State University, 383 Johnson Hall, PO Box 646420, Pullman, WA, 99164-6420, USA
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Food Science
  Chemistry
  Engineering, general
  
• 出版者：Springer New York
• ISSN：1932-9954

文摘

Low moisture cookie snacks are expected to possess a crisp texture when consumed. If this crispness is lost, the product is deemed unacceptable to the consumer. The most important factors influencing the crispness of low moisture cookies are moisture and temperature. Studies have shown that there exists a critical water activity where desirable crispness will be lost. Typically, this critical water activity would be obtained through an extensive texture study. However, high resolution dynamic isotherm curves have recently been shown to identify critical water activity values (RHc) by sharp inflections in the adsorption curve. The purpose of this study was to determine if the dynamic isotherm curves for low water activity snack cookies could similarly be used to identify an RHc and if this RHc could be used as a stability indicator. Dynamic isotherms, developed for two low moisture cookies at three different temperatures, were used to determine the RHc. Then, samples preconditioned to various water activity values and temperatures were analyzed for crispness. The effect of water activity on crispness was more important than temperature. Cookie samples at water activity values less than RHc maintained their crispness, but suffered an abrupt loss in texture at water activity values higher than RHc, yielding a sigmoidal shaped response. Fermi’s equation for sigmoidal response was used to model the response of crispness to water activity and estimate a critical water activity for texture loss. Both the RHc and Fermi’s critical water activity were found in the range of texture loss, but the RHc corresponded with the initial loss in texture, while Fermi’s critical water activity was at the midpoint of the texture loss. Since the RHc can be obtained with much less labor and time than a texture study and provides an effective indication of the loss of crispness, it was concluded that the RHc provides a viable alternative for determining the critical water activity for crispness.