Year: 1983
Type: article
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 ricegrains.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 riceingredients, activity of a-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 monthsstorage 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-doseoccurred 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 irradiated below a gamma-doseof 300 krad and stored for twenty-four months at 20-30°C.
Institutions: ITRI International, Industrial Technology Research Institute
Language: English
Subfield: Food Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2141189142