放射性

One, in fact, almost all taken from the natural rock, used to bake the tiles in the soil, more or less contain a certain amount of radioelement, of course, will not cause radioactive danger, when more than a certain amount of radioactive material, would pose a threat to human health.

一、事实上，几乎所有采自大自然的岩石、烧制瓷砖用的泥土等，或多或少都含有一定量的放射性元素，当然，并非都会对人体造成放射性危害，只有当放射性物质超过一定数量时，才会对人体健康造成威胁。

Firstly, to work out the distribution features of underground nuclear explosion radioactive leak and γ-ray intensity of infinite uniform radioactive sample and limit radioactive sample inborehole axle.

对核爆炸放射性泄漏分布特征进行了理论计算，研究了无限均匀放射性样品和有限厚放射性样品γ射线沿井轴的分布计算。

Hours after infusion, the radioactivity accumulation appeared in lung, and it revealed that the infused cells distributed mainly in lung, and some appeared in liver, spleen, kidney and bladder. 6 hours after infusion, the radioactivity in lung diminished compared with that at 3 hours after infusion, and bilateral kidneys imagine appeared intensively. 9 hours after infusion, the radioactivity in lung appeared reduced significantly than that at 3 hours after infusion, and liver imagined increasedly, intestine tract imagine appeared in several rats.

本研究中，静脉移植MSCs后3h，肺脏放射性浓集，移植细胞主要分布在双侧肺部，肝脏、脾脏、肾脏和膀胱分布较少；移植6h后，肺脏放射性较移植3h时减弱，双侧肾脏显像明显增强；移植9h后，肺脏放射性较移植3h时明显减弱，肝脏显像增强，个别大鼠肠道出现显像；移植18h后，此时肺脏显像明显稀疏，肝脏和脾脏显像显著加强。

Dinger, who was one of the pioneers of quantum mechanics, imagined putting a cat, a flask of Prussic acid, a radioactive atom, a Geiger counter, an electric relay and a hammer in a sealed box.

&薛定谔的猫&是最著名的未证实实验之一。1935年，量子力学的先驱之一，艾尔文·薛定谔提出了一个妙想：把一只猫、一个装有氢氰酸的烧瓶、一枚放射性原子、一个盖格计数仪、一个继电器和一把锤子一起放置到一个密封的盒子中组成一个装置，如果放射性原子衰变，盖格计数仪将探测到放射性，之后向继电器发送信号使其断开，从而释放之前被固定的锤子，锤子会将砸碎烧瓶并释放其中的氢氰酸，盒子里的猫于是被毒死。

In 1935 Erwin Schr dinger, who was one of the pioneers of quantum mechanics, imagined putting a cat, a flask of Prussic acid, a radioactive atom, a Geiger counter, an electric relay and a hammer in a sealed box.

&薛定谔的猫&是最著名的未证实实验之一。1935年，量子力学的先驱之一，艾尔文·薛定谔提出了一个妙想：把一只猫、一个装有氢氰酸的烧瓶、一枚放射性原子、一个盖格计数仪、一个继电器和一把锤子一起放置到一个密封的盒子中组成一个装置，如果放射性原子衰变，盖格计数仪将探测到放射性，之后向继电器发送信号使其断开，从而释放之前被固定的锤子，锤子会将砸碎烧瓶并释放其中的氢氰酸，盒子里的猫于是被毒死。

Results and Conclusions （1）MRI is better than CT to show the lesion of cerebellar fossa and brain stem.（2）Late radiation encephalopathy may be the result of immunal response to the damage of brain tissue and blood vessel after radiotherapy（3） 18 F-FDG-PET is a effective screenage examimation to diagnosis late radiation encephalopathy.（4）To some degree,the symptoms of the patients were alleviated after therapy with dexamethasome,mannital and vitamine B,etc.Late radiation encephalopathy ought to be given priority to prevention and treated vigorously as soon as possible.

结果和结论（1）CT对鼻咽癌迟发性放射性脑病的诊断有一定价值，但MRI对后颅窝和脑干病变的显示优于CT；（2）迟发性放射性脑病可能是放疗致脑组织血管损伤后引起免疫改变的结果；（3）18-氟代脱氧葡萄糖（ 18F-FDG）-PET是诊断迟发性放射性脑病的有效的影像学检查方法；（4）本组患者经应用激素、甘露醇、多种维生素等治疗，均取得不同程度的改善。

The high rotten coal (including the anthracite and meager coal ) radioactive level is relatively low,( 238U: 29.1Bq/kg , 232Th: 25.9Bq/kg , 226Ra: 37.5Bq/kg), obviously lower than the radioactive levels of the brown coal and bituminous coal, and fluctuating range little relatively stable until Lincang uranium germanium colliery HeKai Tian little dragon's pool power plant make , investigate than right far correctly, prove natural radioactive nuclide (238U , 232Th , 226Ra ) than activity transformation in the course of utilizing and give locality radiate influence that environment bring.

高变质煤放射性水平相对较低，（238U：29.1Bq/kg、232Th：25.9Bq/kg、226Ra：37.5Bq/kg），明显低于褐煤和烟煤的放射性水平，且波动范围较小、相对稳定通过对临沧铀锗煤矿田和开远小龙潭电厂作出调查比对，说明了天然放射性核素（238U、232Th、226Ra）比活度在利用过程中的转移以及给当地放射环境带来的影响。

Zirconolite-rich synroc is ideal solidification material for solidifying high level radioactive waste .

富钙钛锆石型人造岩石将放射性核素固定在其晶格中作为晶体的一部分固定起来，大大提高了放射性废物处置的长期安全性，是固化高放射性废物理想的固化介质。

Radioactive nuclides are solidified at crystal lattice as one part of crystalloid by zirconolite-rich synroc, which greatly enhances the long-term safety of radioactive waste disposing.

富钙钛锆石型人造岩石将放射性核素固定在其晶格中作为晶体的一部分固定起来，大大提高了放射性废物处置的长期安全性，是固化高放射性废物理想的固化介质。

The article is deemed to provide a preliminary calculation of the source item of reactor coolant and solid radwaste,whose basis is various elements of the spent fuel and minitype reactor decommissioning.

本文通过对乏燃料元件与放射性废物在微堆退役过程中各相关因素的综合考虑，在初步计算堆水和放射性废物源项，以及堆本体和其它废物物项的表面剂量水平现场实测的基础上，提出堆本体拆卸和放射性废物的处理和处置的方案。

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。