Starch Lipids and Their Effect on Rice Starch Properties

The properties of starch lipids and the effect of defatting on properties of starch granules from eight rice sorts were studied. Content of lipids associated with starch prepared by sodium dodecyl benzene sulfonate (DoBS) extraction of protein from rice flour ranged from 0.03 to 0.44%. Major lipids were free fatty acids and lysophosphatidyl choline. Major fatty acids were linoleic, palmitic, and oleic or myristic acid. Defatting reduced the gelatinization temperature and the gel viscosity of starch. Various methods of starch preparation were compared.