Physical Properties and Stability of Emulsions as Affected by Native and Modified Yam Starches
This study was conducted in order to determine the physical properties and stability of mayonnaise-like emulsions as affected by modified yam starches. Native yam starch was modified via pre-gelatinization and cross-linking phosphorylation procedures. The emulsions (50% oil dispersed phase) were prepared with 0.3% native potato, native yam, pre-gelatinized yam and cross-linking phosphorylation yam starches. The droplet size of surface weighted mean diameter was found to be significantly (p < 0.05) lower in the sample with cross-linking phosphorylation yam starch as compared to other samples. Moreover, the viscosity of the sample with pregelatinized yam starch was observed to be higher than that of other samples. The phase separation stability was low in the freshly prepared and stored (45 days, 5°C) emulsions containing native yam starch. This study thus generally suggested that modified yam starches were more suitable (i.e. better physical properties and stability) to be used as stabilizers in a similar system i.e. light mayonnaises, rather than a native yam starch.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1058253Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 3054
 L. Jayakody, R. Hoover, Q. Liu, and E. Donner, "Studies on tuber starches. II. Molecular structure, composition and physicochemical properties of yam (Dioscorea sp.) starches grown in Sri Lanka," J. Carbohyd Poly. 2007, vol 69, pp. 148-163.
 J. Bao, and C. J. Bergman, "Starch as An ingredients : Manufacture and Applications- in Starch in Food (Structure, Function and Applications), (Eliasson, A., ed) Woodhead Publishing Limited, Abington Hall, England, 2004, pp. 258 - 283.
 J. Singh, O. J. McCarthy, H. Singh, P. J. Moughan, and L. Kaur, "Morphological, thermal and rheological characterization of starch isolated from New Zealand Kamo Kamo (Cucurbita pepo) fruit - A novel source," J. Carbohyd Poly. 2007, vol 67, pp. 233 - 244.
 I. Nor Hayati, Y. B. Che Man, C. P. Tan, and I. Nor Aini, "Droplet characterization and stability of soybean oil/palm kernel olein o/w emulsions with the presence of selected polysaccharides," Food Hydro. 2009, vol 23, pp. 233 - 243.
 D. Peressini, A. Sensidoni, and B. D. Cindio, "Rheological characterization of traditional and light mayonnaise," J. Food Eng. 1998, vol 35, pp. 409 - 471.
 M. Dolz, M. J. Hern├índez, J. Delegido, M.C. Alfaro, and J. Mu├▒oz, "Influence of xanthum gum and locust bean upon flow and thixotropic behaviour of food emulsions containing modified starch," J. Food Eng. 2007, vol 81, pp. 179 - 186.
 A. R. Taherian, P. Fustier, and H. S. Ramaswamy, "Effect of added oil and modified starch on rheological properties, droplet size distribution, opacity and stability of beverage cloud emulsions," J. Food Eng. 2008, vol 77, pp. 687 - 696.
 R. M. L. Alves, M. V. E. Grossmann, and R. S. S. F. Silva, "Gelling properties of extruded yam (Dioscorea alata) starch," J. Food Chem. 199, vol 67, pp. 123-127.
 K. N. Waliszewski, A. A. Maria, A. B. Luis, and A. M. Jose, "Changes of banana starch by chemical and physical modification," J. Carbohyd Poly. 2004, vol 52, pp. 237-242.
 C. G. Mothé, A. D. Azevedo, and R. Antoniassi, "Rheological characterization of emulsions from soymilk," 3rd international Symposium on Food Rheology and Structure, 2001, pp. 531 - 532.
 H. Mirhosseini, C. P. Tan, A. Aghlara, S. A. H. Nazimah, Y. Salmah, and H. C. Boo, "Influence of pectin and CMC on physical stability, turbidity loss rate, cloudiness and flavor release of orange beverage emulsion during storage," J. Carbohyd Poly. 2008, vol 73, pp. 83-91.
 O. A. Odeku, W. Schmid, and K. M. Picker-Freyer, "Material and tablet properties of pregelatinized (thermally modified) Dioscorea starches," European J. Pharm Biopharm. 2008, vol 70, pp. 357-371.
 C. Charutigon, J. Jitpupakdree, P. Namsree, and V. Rungsardthong, "Effects of processing conditions and the use of modified starch and monoglyceride on some properties of extruded rice vermicelli," J. Food Sci. 2008, vol 41, pp. 642-651.
 A. E. McPherson, and J. Jane, "Comparison of waxy potato with other root and tuber starches," J. Carbohyd Poly. 1999, vol 40, pp. 57-70.
 E. H. Nabeshima, and M. V. E. Grossman, "Functional properties of pregelatinized and cross-linking cassava starch obtained by extrusion with sodium trimetaphosphate," J. Carbohyd Poly. 2001, vol 45, pp. 347 - 353.
 R. Pal. "Shear viscosity behavior of emulsions of two immiscible liquids," J. Coll and Interf Sci. 2000, vol 225, pp. 359-366.
 A. Arocas, T. Sanz, and S. M. Fiszman, "Influence of corn starch type in the rheological properties of a white sauce after heating and freezing," J. Food Hydr. 2009, vol 23, pp. 901-907.
 I. Nor Hayati, Y. B. Che Man, C. P. Tan, and I. Nor Aini, "Stability and rheology of concentrated o/w emulsions based on soybean oil/palm kernel olein blends" Food Res Inter. 2007, vol 40, pp. 1051-1061.
 S. Mishra, and T. Rai, "Morphology and functional properties of corn, potato and tapioca starches," J. Food Hydro. 2007, vol 20, pp. 557-566.