| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
|
|---|
| Outline of Final Research Achievements |
To establish discriminating model of Asian rice samples, we collected 358 authentic rice samples from 13 countries by FAO/IAEA Technical Co-operation Projects (RAS 5062 and RAS5081) . We determined their stable isotopic compositions (carbon, nitrogen sulfur, oxygen and strontium) and 18 element compositions (B, Mg, Al, K, Ca, Mn, Fe, Co, Ni, Cu, Zn, As, Rb, Sr, Mo, Cd, Ba and Pb). There were differences in carbon, oxygen and sulfur isotope ratios among Asian countries. There is overlap in the distribution of carbon and oxygen isotope ratios between rice from China and Japan. Strontium isotope ratios of Japanese rice are relatively lower than those of Chinese rice. Moreover, by combining the stable isotope ratios and elements, the classifications of the geographical origin of Asian rice samples are improved. These results suggested that stable isotope and trace element analyses are useful tool to discriminate the geographical origin of Asian rice samples.
|
