结论在生长迅速的小猪模型上，尿硫测定这一无同位素标记、无创的方法可以精确反映含硫氨基酸的分解代谢情况。
Conclusions Detection of urinary sulfur, as a non-tracer and noninvasive method, may be employed to accurately measure the catabolism of sulfur amino acid in the growing piglet model.
再加上检测同位素氧，分析表明至少有一具吃过小米的无头尸的主人，来自东欧，或者来自高海拔地区。
Combined with oxygen isotope testing, the analysis suggested that at least one headless millet-eater came from Eastern Europe or somewhere with access to water from high altitudes.
当最普通的铁（56Fe）的同位素吸收了一个中子，生成物无放射性。
When the commonest isotope of iron (56Fe) absorbs a neutron, the result is not radioactive.
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