铀

But minable uranium deposits can hardly formed in this period because of absence of abundant uranium-rich groundwater and strong absorption of humus and magnalite.

然而这一阶段由于缺乏大规模富铀地下水的注入，以及腐殖质和蒙脱石强的吸附能力，故难以形成具有工业价值的铀矿床。

Tests on groundwater in villages in Bathinda district found the highest average concentration of uranium 56.95mcg/l in the town of Bucho Mandi, a short distance from the Lehra Mohabat ash pond.

检验表明，珀丁达地区村庄的地下水最高的铀平均浓度为56.95mcg/l，就在离勒拉莫哈巴特沉渣池不远的布绰曼迪镇。

The frequencies of micronuclei and multinucleate cells in BEAS-2B cells were significantly increased by DU and these increments of micronucleated cells could be inhibited effectively by DMSO.

贫铀诱发微核细胞、多核细胞增多，DMSO对微核细胞增多有抑制作用，而对多核细胞增多无明显的抑制作用。

Methods Through comet assay and observing mutation frequency of HPRT gene, frequencies of micronuclei and multinucleate cells, chromosome analysis, we researched the hereditary toxicity of DU and protection of DMSO.

采用彗星实验、HPRT基因突变检测、微核多核及染色体分析研究贫铀的遗传毒性作用及DMSO对其毒性的抑制作用。

Fluorites formed in uranium mineralization period in the Zoujiashan and Shazhou uranium deposits have ε〓 values from -6.7 to -8.3 and I〓 values from 0.7145 to 0.7204, similar to their host rocks (porphyroblastic lava and sub-granodioritic porphyry) which have ε〓 values from -6.2 to -9.4 and I〓 values from 0.7121～0.7192. On diagram of ε〓- t, the fluorites and host rocks plot in similar area within the evolution field of the basement rocks at Xiangshan. The lead isotopic compositions of pyrites formed in uranium mineralization period plot as a line on diagram of 〓Pb/〓Pb vs.〓Pb/〓Pb. The host rocks plot at the lower value end. Calculation based on the slope of the line and the mineralzation age yields age of 144Ma for the geological body which provided uranium for the mineralization.

邹家山和沙洲铀矿床成矿期萤石的ε〓值(-6.7～-8.3)和I〓值(0.7145～0.7204)与赋矿围岩(碎斑熔岩及次花岗闪长斑岩)的ε〓值(-6.2～-9.4)和I〓值(0.7121～0.7192)相似，在ε〓-t图上，成矿期萤石数据点的投影范围与赋矿围岩的基本吻合，且均落在相山元古宙基底演化域范围内；成矿期黄铁矿的铅同位素组成在〓Pb/〓Pb-〓Pb/〓Pb关系图上呈线性分布，而火山岩的铅同位素组成位于此相关线的低值一端；利用异常铅线的斜率及成矿年龄计算出富铀地质体的形成年龄为144Ma，这与赋矿围岩的成岩年龄(135～140Ma)非常接近。

The accurate analysis of the uranium content in the reference materials is based on the potentiometric titration method.

采用以基准物质重铬酸钾为滴定剂的自动电位滴定法对基准物质中的铀含量进行准确定值。

The precent development,including development of new leaching processes and equipment and soon,in bacteria leaching of uranium and gold ores at home and abroad are described in this paper.

阐述了目前国内外微生物浸出技术在铀、金矿石中的最新进展，包括浸出新工艺的研究、浸出设备的研制等，并提出了建

The graphite deposit is characterized by strata-bound being a series of ore containing uraniummand vanadium predominatingly.

矿床具层控性质，为含金属元素钒、铀为主的矿石系列。

The pyrophoric nature of DU causes targets to ignite.

贫铀的自燃效应更会将目标点燃。

The method has been applied to the determination of trace Th in REE and U contained ores with satisfactory results

方法已用于测定稀土和铀存在下的矿石管理样中的微量钍，结果与原结果相符

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。