By examining these samples for the presence of radiocarbon , the developer of a particular drug can see whether the active ingredients are absorbed into the body and , if they are , how long they persist there 通过检测这些对象中放射性碳，特殊药物的研发者可以看到药物有效成分是否被机体吸收，如果是，他们能存在多久。
Previously it was thought that this spread took place between 43 , 000 and 36 , 000 years ago , but the re - evaluated data suggests that it actually happened between 46 , 000 and 41 , 000 years ago - starting earlier and moving faster 但是用放射性碳测定年代的一项最新数据表明，迁移过程应该在4 . 6万年至4 . 1万年前就已经发生了，即现代人祖先更早且更快地进入了欧洲。
Working with international colleagues , they have applied dating techniques on the sediment itself and on finds including a land snail , a water snail and a mammoth tooth , all of which came back with an age of around 40 , 000 years 科协家通过放射性碳鉴定技术和激光学鉴定技术断定，这些脚印属于人类，且约有4万年的历史。除此之外，科学家还发现了一只蜗牛一只水蜗牛和一颗猛犸的牙齿，并断定它们也约有4万的历史。
Rather than taking some 7 , 000 years to colonize europe from africa , the reinterpreted data shows the process may only have taken 5 , 000 years , scientist paul mellars from cambridge university said in the science journal nature on wednesday . " the same chronological pattern points to a substantially shorter period of chronological and demographic overlap between the earliest . modern humans and the last survivors of the preceding neanderthal populations , " he wrote 据路透社2月23日报道，来自剑桥大学的科学家保罗米拉斯在最新一期的英国自然杂志上指出，用放射性碳测定年代的一项最新数据表明，人类祖先从非洲进入欧洲后，仅花费了5000年的时间就取代了欧洲早期居民尼安德特人，而不是传统的理论所认为7000年。
The bacterial bioplastic coating argument is the strongest , as there have been cases in which ancient textiles have yielded radiocarbon dates much younger than other artifacts in the same sites ? most notably in the instance of mummy 1770 in the british museum , whose bones dated 800 to 1 , 000 years older , according to the radiocarbon tests , than the textile in which they were wrapped 细菌性的“原生体覆盖物”的争论来得更激烈，已经有案例，就是古代纺织品的放射性碳年代测定比其他同样大小的史前器物的年代要晚得多? ?最值得注意的例子就是1770年陈列在大英博物馆的木乃伊，根据放射性碳年代测定，骨骼的年代为800至1000年之久，它们都被包裹着。
