| migration of (14)c in the paddy soil-to-rice plant system after (14)c-acetic acid breakdown by microorganisms below the plow layer. | migration of (14)c derived from (14)c-acetic acid was examined by using soils sampled from paddies in four administrative areas in japan (aomori, yamanashi, ehime and okinawa) and rice plant in a tracer experiment to understand the fate of (14)c in the paddy soil-to-rice plant system. the loss of (14)c radioactivity levels derived from (14)c-acetic acid was caused by soil microorganism breakdown. a part of the (14)c fixation to soil was caused by microbial assimilation into the fatty acid fracti ... | 2010 | 19896253 |
| atmospheric 14 c co 2 variations in japan during 1982--1999 based on 14 c measurements of rice grains. | (14)c in rice grains is a useful tracer of atmospheric (14)c(co(2)). (14)c measurement in rice grains for 17 years during 1982--1999 reveals the following. there is negative correlation between delta(14)c and the population densities of localities in japan. under-populated areas in the northern area of japan and okinawa remained clean in the 1990s. the (14)c(co(2)) decline rates at those areas are near to that of shauinsland. a latitudinal effect due to chinese nuclear tests is observed in 1982. ... | 2005 | 15935683 |
| rice as the most influential source of cadmium intake among general japanese population. | the objective of the present study is to examine whether rice is still a leading source of cadmium (cd) burden among general populations in japan. for this purpose, 10 prefectures were selected from all over japan (including the northern- and southern-most hokkaido and okinawa prefecture, respectively). cadmium levels in urine of never-smoking women (corrected for creatinine; cd-ucr) were compared with the rice- and wheat product-based cd intake, which were estimated from cd contents in rice and ... | 2003 | 12670756 |