Abstract
Highlights Statistical models used to understand how inter-kernel moisture content (MC) variability reduction in dried rice can improve head rice yield and end-use functionality. Microwave (MW) pre-drying for 180 seconds followed by gentle natural air drying resulted in low MC variability. The lower the MC variability, the better the head rice yield of the samples. Large rice fractions had the lowest MC variability and highest HRY when compared to medium and unfractionated rice. Abstract. Variability in moisture content between rice kernels due to the drying process within a harvest batch can result in irregularities in yields and the functional quality of the final product. Investigating strategies to achieve greater uniformity in inter-kernel moisture content within dried rice batches is a crucial avenue of research for the rice industry. The objectives of this study were to use a statistical modeling approach to (1) study the influence of moisture content (MC) variability on head rice yield (HRY) and pasting properties, and (2) describe if preheating rice kernels with microwaves (MW) of the 915 MHz frequency prior to natural air drying influences MC variability within single rice kernels. Natural air drying used a chamber with a 25°C air temperature and 56% relative humidity. MW heating was administered at a 3 kW power level for 60, 120, 180, 240, and 300 s. Statistical models were developed to describe the interrelationships among treatments and MC variability, head rice yields, and functionality of the rice. There was a strong correlation (r = 0.9323) between the initial average MC of the rice bulk and the inter-kernel MC variability. The MW heating duration (p<0.0275) significantly impacted MC variability and HRY. MW treatments reduced MC variability within rice kernels and positively influenced rice’s milling yield and pasting properties. All treatments did not significantly impact the pasting properties of rice. This study demonstrates the feasibility of employing MW treatments in tandem with natural air drying to reduce inter-kernel MC variability within dried batches of rough rice. Keywords: Head rice yield, Microwave heating, Moisture content variability, Pasting properties, Single rice kernel.
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Claims 9
Claim · model-written summary
Initial average moisture content of the rice bulk was strongly correlated with inter-kernel MC variability (r = 0.9323).
- Taxon
- rice
Oryza sativae1 - Treatment
- initial average MC of the rice bulke1
- Outcome
- inter-kernel MC variabilitye1
- Direction
- strong correlatione1
- Value
- r = 0.9323e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variability in moisture content between rice kernels due to the drying process within a harvest batch”
e1“There was a strong correlation (r = 0.9323) between the initial average MC of the rice bulk and the inter-kernel MC variability”
Claim · model-written summary
Lower moisture content variability was associated with higher head rice yield.
- Taxon
- riceOryza sativae0
- Treatment
- MC variabilitye0
- Outcome
- head rice yielde0
- Direction
- the bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lower the MC variability, the better the head rice yield of the samples”
e1“Variability in moisture content between rice kernels due to the drying process within a harvest batch”
Claim · model-written summary
Large rice fractions had the lowest moisture content variability compared with medium and unfractionated rice.
- Taxon
- riceOryza sativae0
- Treatment
- Large rice fractionse0
- Outcome
- MC variabilitye0
- Direction
- loweste0
- Comparator
- medium and unfractionated ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large rice fractions had the lowest MC variability and highest HRY when compared to medium and unfractionated rice”
Claim · model-written summary
Large rice fractions had the highest head rice yield (HRY) compared with medium and unfractionated rice.
- Taxon
- riceOryza sativae0
- Treatment
- Large rice fractionse0
- Outcome
- HRYe0
- Direction
- higheste0
- Comparator
- medium and unfractionated ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large rice fractions had the lowest MC variability and highest HRY when compared to medium and unfractionated rice”
Claim · model-written summary
MW treatments reduced moisture content variability within rice kernels.
- Taxon
- riceOryza sativae0
- Treatment
- MW treatmentse0
- Outcome
- MC variabilitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MW treatments reduced MC variability within rice kernels”
Claim · model-written summary
MW treatments positively influenced the milling yield of rice.
- Taxon
- riceOryza sativae0
- Treatment
- MW treatmentse0
- Outcome
- milling yielde2
- Direction
- positively influencede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MW treatments reduced MC variability within rice kernels”
e1“positively influenced”
e2“milling yield and pasting properties”
Claim · model-written summary
All treatments did not significantly affect the pasting properties of rice.
- Taxon
- riceOryza sativae0
- Treatment
- All treatmentse0
- Outcome
- pasting propertiese0
- Direction
- did not significantly impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All treatments did not significantly impact the pasting properties of rice”
Claim · model-written summary
MW heating duration significantly affected moisture content variability and head rice yield (p<0.0275).
- Taxon
- riceOryza sativae0
- Treatment
- MW heating duratione1
- Outcome
- MC variability and HRYe1
- Value
- p<0.0275e1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variability in moisture content between rice kernels due to the drying process within a harvest batch”
e1“The MW heating duration (p<0.0275) significantly impacted MC variability and HRY”
Claim · model-written summary
Microwave pre-drying for 180 seconds followed by natural air drying resulted in low moisture content variability.
- Taxon
- riceOryza sativae0
- Treatment
- Microwave (MW) pre-drying for 180 seconds followed by gentle natural air dryinge1
- Outcome
- MC variabilitye1
- Direction
- lowe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variability in moisture content between rice kernels due to the drying process within a harvest batch”
e1“Microwave (MW) pre-drying for 180 seconds followed by gentle natural air drying resulted in low MC variability”
The same questions in other papers
processing · quality: grain · Oryza sativa (rice)Positive and negative results
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- no effect
- negative
- negative
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See all 55 papers →physical treatment · quality: grain · Oryza sativa (rice)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.