0 one of several types of simple chemical substance that are necessary for healthy growth and development, and exist in animals and plants in very small amounts -- 微量元素
Calculation of simultaneous isotopic and trace element variations during water-rock interaction with applications to carbonate diagenesis.
The heat stable factor which effects these increases in growth could be a specific ion or a trace element.
Major and trace element abundances were measured on fused discs and pressed pellets, respectively.
We use trace element geochemistry to constrain the protolith source of the amphibolites.
The effect of crustal contamination on lava compositions is most readily apparent in major and trace element data.
An amelioration of body weight gain, reduction of mortality and restoration of trace element levels were estimated in infected chickens.
Based on petrographical investigations, 44 representative samples were selected for major and trace element analyses.
The trace element variation within groups is very small.
