查询词典 radiocarbon

DNA extracts were generated from an aurochs humerus bone sample recovered from a cave site located in Derbyshire, England and radiocarbon-dated to 6,738±68 calibrated years before present.

都柏林大学的研究人员利用一种最近开发出来的DNA测序技术从野牛的骨骼中提取出大量的遗传信息。

The limit detection is 1.2 Bq/L and 1.0 Bq/kg for tritium and radiocarbon respectively.

该方法的探测下限为1 0Bq/kg。

Nowadays scientists can answer many questions about the past through a technique called radiocarbon, or carbon-14, dating.

现在科学家们能通过一种被称为放射性碳，即C-14的一种技术来测定年代，回答许多关于过去的事情

This was proven by the discovery of a silt-preserved shipwrecked Arab dhow in the Gaspar Strait near Belitung, which had 63,000 pieces of Tang gold, silver, and ceramics (including a Changsha bowl inscribed with a date:"16th day of the seventh month of the second year of the Baoli reign", or 826 AD, roughly confirmed by radiocarbon dating of star anise at the wreck).

这是证明了，他们发现了一个淤泥保存海难阿拉伯独桅帆船在附近勿加斯帕尔海峡，这6.3万件唐金，银，陶瓷（包括长沙碗刻有一个日期：" 16天的第7个月第二年的宝利统治"，或826年，大致确认了放射性碳测年八角茴香的破坏）。

Arguments and evidence cited against a miraculous origin of the shroud images include a letter from a medieval bishop to the Avignon pope claiming personal knowledge that the image was cleverly painted to gain money from pilgrims; radiocarbon tests in 1988 that yielded a medieval timeframe for the cloths fabrication; and analysis of the image by microscopist Walter McCrone, who concluded ordinary pigments were used.

争论和证据却与裹尸布的神奇起源相反，包括一封中世纪的主教写给教宗阿维尼翁的信，声称肖像是有人运用容貌知识聪明地印上去，为了从朝圣者身上获得金钱；1988年，碳的放射性同位元素测试得出这是一块中世纪时期制造的伪造物；分析肖像的显射镜技术人员沃尔特指出，这只是使用了一种平常的颜料。

The coring was successfully operated on the winter ice-cover of the lake in 2000 and the pioneer practice of the ""off-the-ice"" coring proves to be very useful and economic for taking quality cores from lakes in northern China.A multidisciplinary investigation has been carried out on core HQH4, one of the three 11-m-long cores. Results from previous investigation include lithostratigraphy, radiocarbon dating, paleoecology of Ostracoda, stable isotopic record of ostracod shells, total nitrogen and organic carbon, C/N ratio, 81 C of organic matter etc.

在对深度为11米的HQH4岩芯开展了~(14)C年代学、岩性地层学、介形类古生态及介壳稳定同位素、有机碳和总氮及C/N比值、有机碳同位素等多学科综合分析测试和研究工作的基础上，本硕士学位论文研究侧重开展了：1HQH4岩芯烧失量(Loss-on-ignition)的系统分析测定及该地层学变量的古湖泊和环境变化意义的研究；2沉水植物川蔓藻化石种子生态学特征及其在黄旗海湖泊水位重建和气候变化研究方面的重要意义的研究。

Radiocarbon dating shows that the charred wood in Terra Preta soils is typically more than 1,000 years old.

Radiocarbon 追溯时间表明，这些烧成炭的木头在 Terra Preta 土壤中是很典型的1000多年之久。

Using this varve dating results, we calibrate the other dating methods (radiocarbon dating and U-series dating) which were carried out in Lake Sugan. It was found that in the Little Ice Age with clastic varve type, radiocarbon dating has 2630 years radiocarbon reservoir effect, while beyond the LIA, the radiocarbon reservoir changed as the time passed.

通过已经得到验证的年纹层年龄-深度序列，对苏干湖其它测年手段~(14C测年和铀系测年进行验证，发现在碎屑类纹层沉积阶段即小冰期阶段，水生植物残体的~(14)C测年存在2630年碳库效应，小冰期以外时段碳库效应责随时间变化。

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。

Comparing radiocarbon readings with the natural time clock of the tree's year by year rings, showed the radiocarbon dating system to be inaccurate.

放射性污染与自然相的时钟树的逐年戒指、该系统将放射性碳测年结果不准确。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。