Floros and Chinnan (12) indicated that high temperature
causes mechanical failure of the cell
and then the effect of heat on the tissue causes
biochemical changes, melting and breakdown of
substances such as pectins and polysaccharides
and general disturbance and disorganization of
the structure of the cell. Heat penetration to the
tissue altered the pectin in the middle lamella at
above 60 °C. Pectin in the primary and secondary
walls changes, causing the separation of the compact
lamella into fibrils and a local decrease in the
amount of pectin is observed (17).