Question

Retrogradation can lead to ______ to expel water from polymer network
1. Gelling
2. Syneresis
3. Dextrinization
4. Annealing

Answer 1

Correct Answer - Option 2 : Syneresis

Retrogradation can lead to Syneresis expelling water from the polymer network.

• Syneresis is the process in which liquid comes out from a gel-like substance.
• The reaction of retrogradation occurs when the chains of amylopectin and amylose in gelatinized and cooked starch start re-associating themselves on the cooling of the starch.

• Gelling:
  • ​A gel is a sol in which the solid particles have meshed such that a rigid or semi-rigid mixture results. 
• Dextrinization:
  • Dextrinization is the process involving the browning of starch foods when subjected to dry heat. 
  •  It is defined as the breakdown of starch into dextrins.
• Annealing:
  • ​Annealing is a heat treatment process that changes the physical and sometimes also the chemical properties of a material to increase ductility and reduce the hardness to make it more workable.