Hydrocolloids are frequently used in several foods for thickening.
The process of thickening involves the nonspecific entanglement of conformationally disordered polymer chains; it is essentially a polymer-solvent interaction (Philips et al. 1986).
Thickening occurs above a critical concentration known as overlap concentration (C*).
Below this, the polymer dispersions exhibit Newtonian behaviour but show a non-Newtonian behaviour above this concentration (Philips and Williams 2000).
Hydrocolloids that have been used as thickening agents (Table 1) in various food systems include starch, modified starch, xanthan, galactomannans like guar gum and locust bean gum (LBG), gum Arabic or acacia gum, gum karaya, gum tragacanth and carboxymethyl cellulose (CMC).
The thickening effect produced by the hydrocolloids depends on the type of hydrocolloid used, its concentration, the food system in which it is used and also the pH of the food system and temperature.
Hydrocolloids are frequently used in several foods for thickening. The process of thickening involves the nonspecific entanglement of conformationally disordered polymer chains; it is essentially a polymer-solvent interaction (Philips et al. 1986). Thickening occurs above a critical concentration known as overlap concentration (C*). Below this, the polymer dispersions exhibit Newtonian behaviour but show a non-Newtonian behaviour above this concentration (Philips and Williams 2000). Hydrocolloids that have been used as thickening agents (Table 1) in various food systems include starch, modified starch, xanthan, galactomannans like guar gum and locust bean gum (LBG), gum Arabic or acacia gum, gum karaya, gum tragacanth and carboxymethyl cellulose (CMC). The thickening effect produced by the hydrocolloids depends on the type of hydrocolloid used, its concentration, the food system in which it is used and also the pH of the food system and temperature.
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