查询词典 radioactive carbon

Nature, most elements have two or more isotopes, the same kinds of elements in the quality of the various isotopes of different, but the types and proportion constant (except for radioactive elements). In 1961, the carbon content of the most abundant in nature, a kind of isotope, carbon-12 atom of a quantity and quality of C as a 12 mass units to it as "benchmarks" for all isotopes of an element according to the average abundance The ratio of the benchmark is the atomic weight of this non-prime, that is listed in the periodic table of atomic weights.

自然界中大多数元素都有两种或更多的同位素，同种元素的各同位素质量不同，但其种类和比例是恒定的。1961年，把碳在自然界含量最丰富的一种同位素，碳12的一个原子的质C量定为12个质量单位，把它作为"基准"，某种元素的所有同位素按丰度的平均值与基准之比，就是这种无素的原子量，即元素周期表列出的原子量。

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过虑用纸和纸板有定量滤纸、定性滤纸、滤芯纸板、非热封型茶叶滤纸、色层分析滤纸、工业滤纸、机油滤纸原纸、J-140机油滤纸、WJ-140机油滤纸、J-85机油滤纸、5um细柴油滤纸、C-170柴油滤纸、柴油滤纸原纸、滤油纸、WC-150燃油滤纸、HM－180航空滤纸、J－180棉胶滤纸、M－150棉胶滤纸、未浸530滤纸、热封型茶叶滤纸、K-120空气滤纸、K-280空气滤纸、K-80空气滤纸、1号滤纸、 2号滤纸、1号微滤纸、2号微滤纸、3号微滤纸、01号空气过滤纸、02号空气过滤纸、03号空气过滤纸、04号空气过滤纸、05号空气过滤纸、S-06 号空气过滤纸、沙漠空气滤纸、MH-530滤纸、1.5棉机滤纸、C-180金子棉柴油滤纸、NC－220滤纸、皱纹220滤纸、啤酒过滤纸、除菌滤纸、玻璃纤维过滤纸、牛奶过滤纸、净水纸、癌细胞过滤纸、精密磨床用滤纸、液压油滤纸、活性炭滤纸、放射性气体测定专用活性炭滤纸、含合成纤维滤纸、无波纹板 WG-59过滤纸、油气分离过滤纸、缝隙过滤纸、烟度计用滤纸、铅烟过滤纸、耐高温空气过滤纸、离子交换树脂填充滤纸、阳离子交换纤维滤纸、未涂膜除菌型石棉滤板、涂膜除菌型液净滤板、未涂膜除菌型液净滤板、SI皱纹滤纸、高效滤清器瓦楞原纸、69型防毒面具过滤纸、69型净化空气滤纸、49型净化空气滤纸、0.1um高效空气滤纸、泡茶包装纸、三滤纸。

As a result, all living organisms absorb an equilibrium concentration of radioactive carbon.

作为一个结果，所有的活生物体吸收平衡浓度放射性碳。

The technique is so sensitive that it can detect a single radioactive carbon atom hiding among a quadrillion ordinary ones.

这种技术是如此的灵敏以至于可以在百万的四次方个原子中找到某一个放射性碳原子。

The testing of nuclear weapons in the 1950s spewed a lot of radioactive carbon-14 into the air.

上个世纪50年代的核武器试验的结果导致向空气中排放了大量的放射性碳14。

Working with a captive breeding colony in Germany, Christian Voigt of the Leibniz Institute for Zoo and Wildlife Research in Berlin and Professor John Speakman of the University of Aberdeen fed long-tongued bats sugar containing non-radioactive carbon-13 and then measured the amount of carbon-13 in the bats' exhaled breath.

德国莱布尼兹动物园与野生动物研究所的Christian Voigt与阿伯丁大学的教授John Speakman一起共同进行了该项研究，他们用含有非放射性碳13的糖类食物来喂食长舌蝙蝠，然后检测蝙蝠呼出的气体中碳13的含量。

Libby discovered radioactive carbon element dating method and solved the puzzle of earth and human history.

利比发现的放射性碳14定年法，解答了地球与人类历史上的疑惑。

According to radioactive carbon dating and after correction, age about 6,000 years BC.

据放射性碳素断代并经校正，年代约为公元前6000年。

The radioactive carbon atoms weigh 14 atomic units, whereas run-of-the-mill ones weigh 12 units.

这种放射性的碳原子为14原子单位，而普通碳原子为12原子单位。

The radioactive carbon atoms weigh 14 atomic units, whereas run-of-the-mill ones weigh 12 units.

放射性碳元素的原子量是14个单位，一般碳元素的原子量是12个单位。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。