Effects of salts on the gelatinization and retrogradation properties of maize starch and waxy maize starch
2016; Elsevier BV; Volume: 214; Linguagem: Inglês
10.1016/j.foodchem.2016.07.040
ISSN1873-7072
AutoresWei Wang, Zhou Hong-xian, Hong Yang, Siming Zhao, Youming Liu, Ru Liu,
Tópico(s)Phytase and its Applications
ResumoThe objective of this study was to evaluate the effects of salts on the gelatinization and retrogradation of maize and waxy maize starch. Experimental results showed that the salting-out or structure-making ions, such as F(-) and SO4(2-), decreased the swelling power, solubility and transparency of both starches, but increased the gelatinization temperature, enthalpy, and syneresis, due to the tendency of these ions to protect the hydrogen bond links among starch molecules. On the other hand, the salting-in or structure-breaking ions, such as I(-) and SCN(-), exhibited the opposite effects. Microscopic observations confirmed such effects of salts on both starches. Furthermore, the effects of salts were more significant on waxy maize and on normal maize starch. Generally, salts could significantly influence on the gelatinization and retrogradation of maize and waxy maize starch, following the order of the Hofmeister series.
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