Abstract
Gamma-radiation effects on Taiwan-produced rice-grains have been investigated and discussed to find an advantageous application of radiation processing on the preservation of rice-grains.This paper deals with the results obtained from the three major kinds of rice-grains which were gamma-irradiated and stored. The factors of contaminated microorganisms on the rice-grains, chemical analysis of rice-ingredients, activity of α-amylase in the rice-grains, germination-rate of the rice-grains, rice-insect fertility and cooking quality of the hulled rice were studied. Among them, the following factors were considered as the main results. 1. Gamma-irradiation could reduce the contaminated microorganisms remarkably as the gamma-dose was raised over 100 krad, e. g., reduction of the survivals of microorganisms to 19.62-39.76% with 100 krad, to 5.41 -9.09% with 300 krad, to 0.58-0.81% with 1 Mrad during the twelve months storage period. 2. Some fluctuations on the fat acidity and the contents of reducing sugars and thiamine in the irradiated rice-grains were observed in the period of twelve months preservation at 20-30°C. 3. The germination of rice-grains was reduced considerably with the irradiated samples exposed to a gamma-dose over 50 krad. 4. No deleterious effects on rice-insect fertility on the irradiated rice-grains with a 50 krad gamma-dose occurred during the twenty-four months storage period, unlike those of the unirradiated ones and the irradiated ones with gamma-doses below 30 krad. 5. No significant changes were found on the cooking quality of the hulled rices irradiatedbelow a gamma-dose of 300 krad and stored for twenty-four months at 20-30°C.
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Claims 5
Claim · model-written summary
Irradiation reduced microorganisms on rice grains at increasing doses during 12 months of storage.
- Taxon
- rice-grains
Oryza sativat0 - Treatment
- Gamma-irradiatione0
- Outcome
- contaminated microorganismse0
- Direction
- reducee0
- Value
- 19.62-39.76%e0
- Qualifier
- 100 krade0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gamma-irradiation could reduce the contaminated microorganisms remarkably as the gamma-dose was raised over 100 krad, e. g., reduction of the survivals of microorganisms to 19.62-39.76% with 100 krad, to 5.41 -9.09% with 300 krad, to 0.58-0.81% with 1 Mrad during the twelve months storage period”
t0“rice-grains”
Claim · model-written summary
Fat acidity and reducing sugar and thiamine contents fluctuated during storage of irradiated rice grains.
- Taxon
- rice-grainsOryza sativae0
- Outcome
- fat acidity and the contents of reducing sugars and thiaminee0
- Setting
- 20-30°Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Some fluctuations on the fat acidity and the contents of reducing sugars and thiamine in the irradiated rice-grains were observed in the period of twelve months preservation at 20-30°C”
Claim · model-written summary
Gamma doses above 50 krad considerably reduced rice-grain germination.
- Taxon
- rice-grainsOryza sativae0
- Treatment
- gamma-dose over 50 krade0
- Outcome
- germination of rice-grainse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The germination of rice-grains was reduced considerably with the irradiated samples exposed to a gamma-dose over 50 krad”
Claim · model-written summary
Rice-insect fertility showed no deleterious effect at 50 krad during 24 months, unlike unirradiated grains and doses below 30 krad.
- Taxon
- rice-grainsOryza sativae0
- Treatment
- 50 krad gamma-dosee0
- Outcome
- rice-insect fertilitye0
- Direction
- No deleterious effectse0
- Qualifier
- twenty-four months storage periode0
- Comparator
- unirradiated ones and the irradiated ones with gamma-doses below 30 krade0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No deleterious effects on rice-insect fertility on the irradiated rice-grains with a 50 krad gamma-dose occurred during the twenty-four months storage period, unlike those of the unirradiated ones and the irradiated ones with gamma-doses below 30 krad”
Claim · model-written summary
Cooking quality of hulled rice did not change significantly after doses below 300 krad and 24 months of storage.
- Taxon
- hulled ricese0
- Treatment
- a gamma-dose of 300 krade0
- Outcome
- cooking qualitye0
- Direction
- No significant changese0
- Qualifier
- twenty-four monthse0
Not reportedComparator
Verbatim
e0“No significant changes were found on the cooking quality of the hulled rices irradiatedbelow a gamma-dose of 300 krad and stored for twenty-four months at 20-30°C”
The same questions in other papers
radiation · growth · Oryza sativa (rice)Results differ
61 papers in the same direction as this paper · 22 in the opposite direction
- positive
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