铀后的

Results In the medium and high dose F0 groups, it was observed that the atrophy and incrassation of seminiferous tubule, decrease of spermatogenesis, hyperplasia of interstitial tissue, especially in high dose groups spermatozoon abnormality and nucleolus concentration in the rats testis after DU ingestion for 14 months. The changes became more severe with the prolongation of DU ingestion. Such changes occurred in filial rats (F1) after DC ingestion for 5 months. In the medium and high dose F0 groups, it was observed that a little atrophy of kidney glomerulus, hyperplasia of interstitial tissue after DC ingestion for 14 months, and kidney glomerulus fibrosis happened after DC ingestion for 20 months, such changes occurred in filial rats (F1) after DC ingestion for 5 months In the medium and high dose F0 groups, splenic germinal center and periarterial lymphatic sheaths were hyperplasia , companies with lymphopoiesis after DC ingestion for 7 months, splenic white pulp became more small and sparse after DC ingestion for 20 months.

结果 F0代的中、高剂量组大鼠摄入贫铀14个月后可见雄性的精曲小管萎缩，管壁增厚呈空虚网状，生精细胞层次减少，间质细胞增生，但仍见有精子生成；高剂量组可见到精子呈异型性改变，细胞核浓缩深染，且随着摄入时间延长改变愈趋明显；F1代大鼠摄入贫铀5个月后就有上述改变且更为严重。F0代中、高剂量组大鼠摄入贫铀14个月后肾小球轻度萎缩，间质增生明显，20个月时肾小球萎缩纤维化；F1代大鼠摄入贫铀5个月后就有上述改变。F0代中、高剂量组摄入贫铀7个月时脾脏生发中心和淋巴鞘增生，淋巴母细胞增生活跃，20个月时脾小体减少，生发中心稀疏；F1代大鼠摄入贫铀早期和晚期有类似改变。F0和F1代高剂量组摄入贫铀早期肝脏有炎症细胞浸润，晚期骨髓有核细胞减少，脂肪细胞增加。

Only two, neptunium (93) and plutonium (94), occur in nature, and only as traces in uranium ore s as a result of neutron irradiation.

自然界里只有錼(93)和钸(94)两种超铀元素，而且只以痕量存在于铀的矿物中，是受中子辐照后的产物。

Only two, neptunium (93) and plutonium (94), occur in nature, and only as trace s in uranium ores as a result of neutron irradiation.

自然界里只有錼(93)和钸(94)两种超铀元素，而且只以痕量存在于铀的矿物中，是受中子辐照后的产物。

Only two, neptunium (93) and plutonium (94), occur in nature, and only as traces in uranium ores as a result of neutron irradiation.

自然界里只有錼(93)和钸(94)两种超铀元素，而且只以痕量存在于铀的矿物中，是受中子辐照后的产物。

Its stable isotope s are all end products of radioactive decay of uranium and other heavy elements.

其稳定的同位素为铀和其它重金属放射衰变后的最终产物。

Its stable isotopes are all end products of radioactive decay of uranium and other heavy elements.

其稳定的同位素为铀和其它重金属放射衰变后的最终产物。

Reclaim to involve the resource of mine stopping uranium ahead of schedule as far as possible, can increase rare uranous resource not only reclaim utilization rate, reduce waste, and be helpful for retiring be opposite after processing retire the management of the project.

尽量回收提前关停铀矿山的资源，不仅可以提高稀有铀资源的回收利用率，减少浪费，而且有利于退役治理后对退役工程的治理。

Passive film was formed onto the surface of stainless steel in nitric acid solution.

在90℃温度均匀腐蚀条件下，经过40天后，321不锈钢样品在低酸度的硝酸铀酰溶液中的腐蚀速率小于0.04g／m〓。h，铀酰离子以六水硝酸铀酰的形式吸附于321不锈钢表面，在含氯离子和次氯酸根离子的硝酸铀酰溶液中，321不锈钢发生了点蚀，出现了点蚀坑。

Influence of vacuum heat-treatment on the corrosion resistance of uranium surface overlaid with graphite at 100 ℃ is studied.

为了提高铀的抗氧化腐蚀能力，利用石墨的粘附特性，在铀表面涂覆一层石墨，并进行真空热处理，在100 ℃条件下对热处理后的样品进行氧化腐蚀试验。

The results show that the graphite coat after vacuum heat treatment can protect the uranium surface.

经过真空热处理后的石墨层均能够起到对铀表面的保护作用。

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。