K-40相关论文
The Changjiang River is the third longest river in the world,the longest river in China.It has a drainage area of about ......
Background: K-40 is a kind of common natural radionuclide and an important source of the internal radiation dose in ......
用原子吸收光谱法测定了北京地区６５例居民骨灰中钾（下用Ｋ表示）含量。结果表明，骨灰中Ｋ含量呈对数正态分布，范围为０．７５－８．４４ｇ／ｋｇ（骨灰），算术平均值和单次标准......
Amaranthus is a dicotyledonous pseudocereal and one of the new world’s oldest crops,having originated from Meso-America......
