Water Relationships in Foods pp 687-701 | Cite as
Ionic Diffusion in Frozen Starch Gels
Abstract
Quality changes in food frozen by different conditions and at different storage temperatures were demonstrated using a model system. A frozen starch gel represents a frozen food matrix, and ions in the external medium represent the reactant molecules. We determined the effective diffusion rates of Zn+2 ions into frozen starch gel cylinders that were frozen at different freezing rates. The diffusion was performed at −8° and −15°C. The amounts of ion diffused were determined by atomic absorption, whilst the structure of the frozen samples could be simultaneously determined by scanning electron microscopy. The effective diffusion rates were found to correlate with the amount of unfrozen portion of the samples. This suggests that ions move mainly through the unfrozen portion around the ice crystals. Fast- and slow-frozen samples exhibited significantly different effective diffusion rates at −15°C, which might be due to differences in size and orientation of ice crystals. Zn+2 ions moved slower at −158°C than at −8°C.
Keywords
Freezing Rate Slow Freezing Freeze Food Freeze System Fast FreezingPreview
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References
- 1.T.P. Labuza, S.R. Tannenbaum, and M. Karel, Water content and stability of low moisture and intermediate moisture foods, Food Technol. 24:544 (1970).Google Scholar
- 2.C.C. Seow, Reactant mobility in relation to chemical reactivity in low and intermediate-moisture systems, J. Sci. Food Agric. 26:535 (1975).Google Scholar
- 3.R.B. Duckworth, J.Y. Allison, and H.A.A. Clapperton, The aqueous environment for chemical change in intermediate moisture foods, in: “Intermediate Moisture Foods,” R. Davies, G.G. Birch, and K.J. Parker, eds., Applied Science, London (1976).Google Scholar
- 4.W. Naesen, G. Bressoleers, and P. Tobback, A method for determination of diffusion coefficients of food components in low and high moisture systems, J. Food Sci. 46:1446 (1981).CrossRefGoogle Scholar
- 5.R. Brockmann and L. Acker, Wasseraktivitat and enzymatische reaktionen, Lebensmittel-Technol. 11:2 (1978).Google Scholar
- 6.K. Potthast, The influence of water activity on enzymatic activity in biological systems, in: “Dry Biological Systems,” J.H. Crowe and J.S. Clegg, eds., Academic Press, London (1978).Google Scholar
- 7.J. Flink, The retention of volatile components during freeze drying: a structurally based mechanism, in: “Freeze Drying and Advanced Food Technology,” S.A. Goldlith, L. Rey, and W.W. Rothmayr, eds., Academic Press, London (1975).Google Scholar
- 8.O. Omatete and C.J. King, Volatiles retention during rehumidification of freeze dried food models, J. Food. Technol. 13:265 (1978).CrossRefGoogle Scholar
- 9.L.C. Menting, B. Hoogstad, and H.A.C. Thijssen, Diffusion coefficients of water and organic volatiles in carbohydrate-water systems, J. Food. Technol. 5:111 (1970).CrossRefGoogle Scholar
- 10.W.H. Rulkens and H.A.C. Thijssen, The retention of organic volatiles in spray-drying aqueous carbohydrate solutions. J. Food Technol. 7:95 (1972).CrossRefGoogle Scholar
- 11.E.I-M. Karlsson, “Gaseous Diffusion in Solid Food Systems and the Dependence on Structure and Temperature,” Ph.D. dissertation, University of California, Davis (1985).Google Scholar
- 12.J.A. Bressan, P.A. Carroad, R.L. Merson, and W.L. Dunkley, Temperature dependence of effective diffusion coefficient for total solids during washing of cheese curd, J. Food. Sci. 46:1958 (1981).CrossRefGoogle Scholar
- 13.H.G. Schwartzberg and R.Y. Chao, Solute diffusivities in leaching processes, Food Technol. 2:73 (1982).Google Scholar
- 14.J.B. Fox, Diffusion of chloride, nitrite and nitrate in beef and pork, J. Food. Sci. 45:1740 (1980).CrossRefGoogle Scholar
- 15.R. Stahl and M. Loncin, Prediction of diffusion in solid foodstuff, J. Food Proc. Preserv. 3:213 (1979).CrossRefGoogle Scholar
- 16.B. Bichsel, S. Gals, and R. Signer, Diffusion phenomena during the decaffeination of coffee beans, J. Food Technol. 11:637 (1976).CrossRefGoogle Scholar
- 17.H.E. Wistreich, R.E. Morse, and L.J. Kenyon, Curing of ham. A study of sodium chloride accumulation. 1: Methods, effect of temperature, cations, muscles and solution concentration, Food Technol. 13:441 (1959).Google Scholar
- 18.H.E. Wistreich, R.E. Morse, and L.J. Kenyon, Curing of ham. A study of sodium chloride accumulation. 2: Combined effects of time, solution concentration and solution volume, Food Technol. 14:549 (1960).Google Scholar
- 19.L. Kormendy and G. Ganter, Zur technologie des Pokelns in der Fleischindustrie, Z. Lebensmitt-Untersuch und-Forsch 107:315 (1958).Google Scholar
- 20.F.W. Wood, The diffusion of salt in pork muscle and fat tissue, J. Sci. Food Agric. 17:138 (1966).CrossRefGoogle Scholar
- 21.M. Jul, “The Quality of Frozen Foods,” Academic Press, London (1984).Google Scholar
- 22.T. Moran, Rep. Fd. Invest. Board (UK). 22 (1932), as cited in ref. 21.Google Scholar
- 23.M.C. Anon and A. Calvelo, Freezing rate effects on the drip loss of frozen beef, Meat Sci. 4:1 (1980).CrossRefGoogle Scholar
- 24.T.N. Morris and J. Barker, Rep. Fd. Invest. Board (UK). 92 (1932), as cited in ref. 21.Google Scholar
- 25.W.C. Dietrich, F.E. Lindquist, J.C. Miers, G.S. Bohart, H.J. Neumann, and W.F. Talburt, The time-temperature tolerance of frozen foods. IV. Objective test to measure adverse changes in frozen vegetables, Food Technol. 11:109 (1957).Google Scholar
- 26.W.C. Dietrich, M-D. Nutting, R.L. Olson, F.E. Lindquist, M.M. Boggs, G.S. Bohart, H.J. Neumann, and H.J. Morris, The time-temperature tolerance of frozen foods. XVI. Quality retention of frozen green snap beans in retail packages, Food Technol. 13:136 (1959).Google Scholar
- 27.W.C. Dietrich, R.L. Olson, M-D. Nutting, H.J. Newmann, and M.M. Boggs, Time-temperature tolerance of frozen foods. XVIII. Effect of blanching conditions on color stability of frozen beans, Food Technol. 13:258 (1959).Google Scholar
- 28.M.M. Boggs, W.C. Dietrich, M-D. Nutting, R.L. Olson, F.E. Lindquist, G.S. Bohart, H.J. Neumann, and H.J. Morris, The time-temperature tolerance of frozen foods. XXI. Frozen peas, Food Technol. 14:181 (1960).Google Scholar
- 29.W.C. Dietrich, M-D. Nutting, M.M. Boggs, and N.E. Weinstein, The time-temperature tolerance of frozen foods. XXIV. Quality changes in cauliflower, Food Technol. 16:123 (1962).Google Scholar
- 30.O.R. Fennema, W.D. Powrie, and E.H. Marth, “Low Temperature Preservation of Foods and Living Matter,” Marcel Dekker, New York (1973).Google Scholar
- 31.S. Charoenrein and D.S. Reid, Effect of freezing conditions and storage temperature on the stability of frozen green beans, in: “Quality Factors of Fruits and Vegetables Chemistry and Technology,” J.J. Jen, ed., American Chemical Society, Washington, D.C. (1989).Google Scholar
- 32.M.J. Kushmerick and R.J. Podolsky, Ionic mobility in muscle cells, Science 166:1297 (1969).CrossRefGoogle Scholar
- 33.R.B. Evan, G.M. Watson, and E.A. Mason, Gaseous diffusion in porous media at uniform pressure, J. Chem. Phys. 35:2076 (1961).CrossRefGoogle Scholar
- 34.S.E. Lindow, personal communication (1987).Google Scholar
- 35.L.R. Maki, E.L. Galyan, M. Chang-Chien, and D.R. Caldwell, Ice nucleation induced by Pseudomonas syringae, Appl. Micro. 28:456 (1974).Google Scholar
- 36.S. Charoenrein, M. Goddard, and D.S. Reid, Effect of solute on the nucleation and propagation of ice, in: this book.Google Scholar
- 37.T. Tanaka, Gels. Scientific American 244:124 (1981).CrossRefGoogle Scholar
- 38.C.J. Geankoplis, Principles of mass transfer, in: “Transport Processes and Unit Operations,” Allyn and Bacon, Boston (1978).Google Scholar
- 39.C.F. Wong and J.A. McCammon, Israel J. Chem. 1986, as cited in ref. 40.Google Scholar
- 40.O.A. Karim and A.D.J. Haymet, The ice/water interface, Chem. Phvs. Lett. 138:531 (1987).CrossRefGoogle Scholar
- 41.P.W. Atkins, Molecules in motion: ion transport and molecular diffusion, in: “Physical Chemistry,” W.H. Freeman, San Francisco (1982).Google Scholar