Journal
JOURNAL OF CEREAL SCIENCE
Volume 60, Issue 3, Pages 623-630Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jcs.2014.07.005
Keywords
Superheated steam; Lightly milled rice; Fissures; Micro-mechanical behavior
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Funding
- National Natural Science Foundation of China [3171953]
- National Science and Technology Plan Projects [2012BAD37B02-02, 2012BAD34B0203]
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Superheated steam (SS) was used to inactivate peroxidase of lightly milled rice (LMR) in this study in order to extend shelf-life of LMR. Meanwhile, the effects of SS on physicochemical properties of LMR were evaluated. Compared with hot air (HA), SS could inactivate peroxidase of LMR within a shorter time and result in lesser reduction of moisture content. SS caused much less fissures and alteration of micro-mechanical behavior (intercellular and intracellular cleavage) to LMR than HA did. SS-stabilized LMR, of which peroxidase was inactivated by SS, maintained their natural physicochemical properties including appearance (whiteness of uncooked rice and morphology of cooked rice), cooking quality (water absorption, volume expansion ratio and total solids loss), and texture profile (hardness, adhesiveness chewiness and cohesiveness). Physicochemical properties of LMR were closely connected with fissures. The morphology and texture of cooked LMR might be partly explained by the micro-mechanical behavior of uncooked LMR. SS would be a promising technology for inactivating peroxidase and retaining natural physicochemical properties of LMR simultaneously. (C) 2014 Elsevier Ltd. All rights reserved.
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