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The effects of heat–moisture treatment of rice grains before parboiling on viscosity profile and physicochemical properties
Author(s) -
Arns Bruna,
Paraginski Ricardo Tadeu,
Bartz Josiane,
Almeida Schiavon Rafael,
Elias Moacir Cardoso,
Rosa Zavareze Elessandra,
Dias Alvaro Renato Guerra
Publication year - 2014
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/ijfs.12580
Subject(s) - parboiling , moisture , viscosity , food science , rice flour , chemistry , materials science , agronomy , composite material , biology , raw material , organic chemistry
Summary The effects of heat–moisture treatment ( HMT ) (120 °C for 10, 30 and 60 min) on paddy rice grains before parboiling, on head rice yield (HRY), pasting and thermal properties, and colour and cooking characteristics of parboiled rice were studied. The results indicated that the HMT performed intensifies the changes in grains after parboiling, impacting pasting and thermal properties, which results in rice kernels with yellowish colouration and greater cooking time. HMT increased the temperatures of gelatinisation, with increasing HMT time from 10 to 60 min and reduced the gelatinisation enthalpy. HMT also affected the pasting properties of rice flours, reducing setback and viscosity and increased their stability to heat and mechanical agitation. The HMT performed in rice grains before the parboiling process with 60 min of the treatment decreased the HRY and increased the level of metabolic defects only in the treatment with 60 min.