The total protein and amino acid content of parboiled rice does
not change although the protein bodies in the kernel are ruptured
during the steaming process (Bhattacharya, 2011). The protein is
hydrolysed leading to increased disulphide bonds which increases
the viscosity and hardness in the parboiled rice (Derycke et al.,
2005b). If the ageing of rice is connected with the change in protein
structure and conformations, a study of this change in double boiling parboiling process could be of significant importance because
the rice produced from this method imparts the ‘aged’ characteristics (Bhattacharya, 2004).