Abstract
ABSTRACT Flours and starches from rough rice dried using different treatment combinations of air temperature (T) and relative humidity (RH) were studied to better understand the effect of drying regime on rice functionality. Rough rice from cultivars Bengal and Cypress were dried to a moisture content of ≈12% by three drying regimes: low temperature (T 20°C, RH 50%), medium temperature (T 40°C, RH 12%), and high temperature (T 60, RH 17%). Head rice grains were processed into flour and starch and evaluated for pasting characteristics with a Brabender Viscoamylograph, thermal properties with differential scanning calorimetry, starch molecular‐size distribution with high‐performance size‐exclusion chromatography (HPSEC), and amylopectin chain‐length distribution with high‐performance anion‐exchange chromatography with pulsed amperometric detection (HPAEC‐PAD). Lower head rice and starch yields were obtained from the batch dried at 60°C which were accompanied by an increase in total soluble solids and total carbohydrates in the pooled alkaline supernatant and wash water used in extracting the starch. Drying regime caused no apparent changes on starch molecular‐size distribution and amylopectin chain‐length distribution. Starch fine structure differences were due to cultivar. The pasting properties of flour were affected by the drying treatments while those of starch were not, suggesting that the grain components removed in the isolation of starch by alkaline‐steeping were important to the observed drying‐related changes in rice functionality.
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Claims 7
Claim · model-written summary
Drying at 60°C lowered head rice yield.
- Taxon
- rice
Oryza sativae0 - Treatment
- dried at 60°Ce0
- Outcome
- head ricee0
- Direction
- Lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower head rice and starch yields were obtained from the batch dried at 60°C”
Claim · model-written summary
Drying at 60°C lowered starch yield.
- Taxon
- riceOryza sativae0
- Treatment
- dried at 60°Ce0
- Outcome
- starch yieldse0
- Direction
- Lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower head rice and starch yields were obtained from the batch dried at 60°C”
Claim · model-written summary
Drying at 60°C increased soluble solids and carbohydrates in extraction liquid.
- Taxon
- riceOryza sativae1
- Treatment
- high temperature (T 60, RH 17%)e1
- Outcome
- total soluble solids and total carbohydratese0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which were accompanied by an increase in total soluble solids and total carbohydrates in the pooled alkaline supernatant and wash water used in extracting the starch.”
e1“Rough rice from cultivars Bengal and Cypress were dried to a moisture content of ≈12% by three drying regimes: low temperature (T 20°C, RH 50%), medium temperature (T 40°C, RH 12%), and high temperature (T 60, RH 17%)”
Claim · model-written summary
Drying regime caused no apparent change in starch molecular-size or amylopectin chain-length distributions.
- Taxon
- riceOryza sativat0
- Treatment
- Drying regimee0
- Outcome
- starch molecular‐size distribution and amylopectin chain‐length distributione0
- Direction
- no apparent changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drying regime caused no apparent changes on starch molecular‐size distribution and amylopectin chain‐length distribution.”
t0“Rough Rice”
Claim · model-written summary
Starch fine structure differed by cultivar.
- Taxon
- riceOryza sativat0
- Material
- cultivare0
- Outcome
- Starch fine structure differencese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Starch fine structure differences were due to cultivar.”
t0“Rough Rice”
Claim · model-written summary
Drying treatments affected flour pasting properties.
- Taxon
- riceOryza sativat0
- Treatment
- drying treatmentse0
- Outcome
- pasting properties of floure0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pasting properties of flour were affected by the drying treatments while those of starch were not”
t0“Rough Rice”
Claim · model-written summary
Drying treatments did not affect starch pasting properties.
- Taxon
- riceOryza sativat0
- Treatment
- drying treatmentse0
- Outcome
- those of starche0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pasting properties of flour were affected by the drying treatments while those of starch were not”
t0“Rough Rice”
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