论文部分内容阅读
The effect of microelement on health is a new subject ongoing since the seventies. Some diseases may be related to changes of some elements. Since the last few years changes of Cu, Zn and other elements in the serum and lung of silicosis have been
The effect of microelement on health is a new subject ongoing since the seventies. Some of the last few years changes of Cu, Zn and other elements in the serum and lung of silicosis have been