示踪元素是用于追踪物质运行和变化过程的同位素。常用的有碳14(14C)、磷32(32P)、硫35(35S)、碘131(131I)、氢3(3H)放射性同位素,氢(H),碳(C),磷(P),硫(S),和碘(I)在生化反应中用来追踪路径,被广泛的使用着。词条详细介绍了上述示踪元素的基本情况以及应用领域。
孔隙速度是示踪元素穿过孔隙介质的速度。
The pore velocity is the velocity with which a tracer moves through a porous medium.
美国马里兰,巴尔的摩人体暴露PM 2.5和示踪元素。
Personal exposures to PM2.5 mass and trace elements in Baltimore, MD, USA.
结果表明,精炼过程和钙处理后的钢中显微夹杂物均含有钢包渣示踪元素镧;
Results show that the microinclusions in steel both in the refining process and after calcium treatment include La which is the tracer in ladle slag.
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