INFLUENCE OF THE STARCH GRANULE SURFACE ON THE RHEOLOGICAL BEHAVIOUR OF WHEAT FLOUR DOUGH (original) (raw)

Abstract

The influence of the properties of the starch granule sulface on the rheological behaviour of wheat flour doughs was studied in dynamic oscillation measurements frequency sweep and strain sweep} and in stress relaxation measurements. A flour with a high protein content (1 5 %) was diluted with wheat starch to obtain a protein content of 10%. n e granule sulface of the substituted starch was mod$ed in three different ways: by heat treatment, by adsorption of a wheatproteinfraction and by adsorption of lecithin to the granule sulface. The effects of these mod$ied starches were compared with the results obtained for nonmodged starch and protein or lecithin (in liposomes) added to the flour. Owing to the low concentration of the added protein and lecithin, no effect was observed when they were added to the bulk of flour. However, as a starch-suiface modification the same components influenced the rheological parameters studied. Also the heattreated starch had an effect on the rheological behaviour. f i e study established the importance of the properties of the starch-granule sulface in wheat flour dough.

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References (28)

  1. AACC. 1983a. Method 44-19. The American Association of Cereal Chemists, St. Paul, Minnesota.
  2. AACC. 1983b. Method 54-21. The American Association of Cereal Chemists, St. Paul, Minnesota.
  3. BARLOW, K.K. , BUTTROSE, M.S., SIMMONDS, D.H. and VESK, M. 1973. The nature of the starch-protein interface in wheat endosperm. Cereal Chem. 50, 443454.
  4. BERGENSTAHL, B. and FONTELL, K. 1983. Phase equilibria in the system soybean lecithinlwater. Progr. Colloid Polymer Sci. 68, 48-52.
  5. CLARK, A.H. and ROSS-MURPHY, S.B. 1987. Structure and mechanical pro- perties of biopolymer gels. Adv. Polym. Sci. 83, 57-192.
  6. ELIASSON, A.-C. 1986. On the effects of surface active agents on the gelatiniza- tion of starch -a calorimetric investigation. Carbohydr. Polymers 6,463476.
  7. ELIASSON, A.-C. and LUNDH, G. 1989. Rheological and interfacial behaviour of some wheat protein fractions. J. Texture Studies 20, 431-441.
  8. ELIASSON, A.-C. and TJERNELD, E. 1990a. Adsorption of wheat proteins on wheat starch granules. Cereal Chem. 67, 4, 366-372.
  9. ELIASSON, A.-C. and TJERNELD, E. 1990b. On the influence of added lipid phases on the rheological properties of wheat flour doughs. Z. Lebensm. Unters. Forsch. 191, 35-39.
  10. FRETZDORFF, B., BECHTEL, D.B. and POMERANZ, Y. 1982. Freeze- fracture ultrastructure of wheat flour ingredients, dough, and bread. Cereal Chem. 52, 2, 113-120.
  11. GRENWELL, P. and SCHOFIELD, J.D. 1986. A starch granule protein associated with endosperm softness in wheat. Cereal Chem. 63, 379-380.
  12. HIBBERD, G.E. 1970. Dynamic viscoelastic behaviour of wheat flour doughs, Part 111: The influence of the starch granules. Rheol. Acta 9, 4, 501-505.
  13. HOOVER, R. and VASANTHAN, T. 1994. Effect of heat-treatment on the struc- ture and physicochemical properties of cereal, legume, and tuber starches. Car- bohydr. Res. 252, 33-53.
  14. JOHANSSON, E. and SVENSSON, G. 1995. Contribution of the high molecular weight glutenin subunit 21* to breadmaking quality of Swedish wheats. Cereal Chem. 72, 287-290.
  15. KULP, K. and LORENZ, K. 1981. Heat-moisture treatment of starches. I. Physicochemical properties. Cereal Chem. 58, 1, 4648.
  16. LARSSON, H. and ELIASSON, A.-C. 1996a. Phase separation of wheat flour dough studied by ultracentrifugation and stress-relaxation. I. Influence of water content. Cereal Chem. 73, 1, 25-31.
  17. LARSSON, H. and ELIASSON, A.-C. 1996b. Phase separation of wheat flour dough studied by ultracentrifugation and stress-relaxation. 11. Influencing of mixing time, ascorbic acid and lipids. Cereal Chem. 73, 1, 18-24.
  18. LARSSON, H. and ELIASSON, A.-C. 1996c. A comparison of equilibrated lipid water systems and the effect of added lecithin on dough rheology of flour milling-streams. J. Sci. Food Agric., submitted.
  19. MACFUTCHIE, F. 1987. Evaluation of contribution from wheat protein frac- tions to dough mixing and breadmaking. J. Cereal Sci. 6, 259-268.
  20. MORRISON, W.R. and SCOTT, D.C. 1986. Measurement of the dimensions of wheat starch granule populations using a coulter counter with 100-channel analyzer. J. Cereal Sci. 4, 13-21.
  21. NIELSON, L.E. 1974. Mechanical Properties of Polymers and Composites 11. pp. 379442, Marcel Dekker, New York.
  22. RASPER, V.F. and DEMAN, J.M. 1980. Effect of granule size of substituted starches on the rheological character of composite doughs. Cereal Chem. 57, SANDSTED, R.M. 1961. The function of starch in the baking of bread. Baker's Dig. 35, 3, 36-44.
  23. SEGUCHI, M. 1984a. Oil-binding ability of heat-treated wheat starch. Cereal Chem. 61, 3, 248-250.
  24. SEGUCHI, M. 1984b. Oil-binding capacity of prime starch from chlorinated wheat flour. Cereal Chem. 61, 241-244.
  25. SMITH, J.R., SMITH, T.L. and TSCHOEGL, N.W. 1970. Rheological pro- perties of wheat flour doughs. HI. Dynamic shear modulus and its dependence on amplitude, frequency, and dough composition. Rheol. Acta. 9,2,239-252.
  26. STENVERT, N.L. and KINGSWOOD, K. 1977. The influence of the physical structure of the protein matrix on wheat hardness. J. Sci. Food Agric. 28, TARDIEU, A., LUZZATI, V. and REMAIN, F.C. 1973. Structure and polymor- phism of the hydrocarbon chain of lipids: A study of lecithin-water phases. J. Mol. Biol. 75, 711-733.
  27. VAN VLIET, T. 1988. Rheological properties of filled gels. Influence of filler matrix interaction. Colloid Polym. Sci. 266, 518-524.
  28. WIKSTROM, K. and ELIASSON, A.-C. 1997. Effects of enzymes and oxidiz- ing agents on shear stress relaxation of wheat flour dough. Additions of pro- tease glucose oxidase ascorbic acid. and potassium bromate. Cereal Chem. submitted. 5, 331-340.