查询词典 thoron

The optimum conditions such as acidity, reaction temperature, dosage of thoron Ⅱ solution and reaction time for the system were studied in detail.

详细考察了反应酸度、温度、钍试剂Ⅱ浓度及反应时间等对铬测定的影响。

The equivalent dose to male and female residents of thoron from honeycomb briquette is 0.29 and 0.25 μSv.

燃煤释放钍及子体所致男性和女性居民的剂量当量分别为0.29和0.25μSv。

The sources and characters of thoron 220 Rn in the buildings, the pattern of indoor thoron 220 Rn's concentration and the assessment of hazard which it brings to human being are discussed,and the method of measurement of indoor thoron's concentration is expounded and the measure for reducing thoron 220 Rn in the buildings is also pointed out.

综述了建筑物内钍射气220 Rn 的来源和性质，讨论了建筑物内220 Rn 浓度的模型及其对人类的危害风险评估，探讨了建筑物内220 Rn 浓度的测量方法，提出了降低建筑物内220 Rn 浓度的措施。

Four popular methods for thoron progeny measurement were discussed, including the aspects of detector, principle, precondition, calculation advantages and disadvantages.

针对4种目前常用的测量220Rn子体的方法、原理、使用条件、计算方法、优缺点等进行了讨论，并在云南的矿井和土房对这4种方法进行了实验比较。

The relation-ship between thorium body content and types of work and length of servicewas analysed.The investigation results from exhaled thoron method werecompared with those from ...

还分析了呼气中浓度及体内钍含量与工种、工龄的关系，比较了呼气中浓度测定法与中子活化测定法的调查结果。

Five holes were drilled on the two side with the size of 2 50mm XI 80mm for thoron source input or sampling.

用有 机玻璃制成积累箱，尺寸为350mm×250mm×180mm，在250mm×180mm的两个侧面上打了五个孔，用于充源或取样。

The contents of 226Ra and 232Th of honeycomb briquette were used to calculate the contribution of honeycomb briquette burning to indoor radon and thoron and their radiation dose to the residents.

应用γ能谱测定了西安市蜂窝煤中天然放射性核素226Ra、232Th和40K的含量，并初步分析了取暖期蜂窝煤燃烧对室内氡及钍射气浓度的贡献，以及所致居民剂量。

A simple thoron chamber,the measurement methods,the effective dose evaluation method of thoron daughters and their primary applications studied are described simply as the followings.

研究被动积分测技术的关键在于研究用于条件实验和刻度的室刻度系统、甄别氡的方法和由暴露量估算子体所致有效剂量的方法。

The concentrations of radon and thoron as well as thoron decay products (220RnD) have been measured by using passive integral monitors in two coal mines of Beijing areas during summer and winter.

用被动式累积探测器在北京房山区史家营（中型煤矿，年产量30万吨）和城关（小型煤矿，年产量3万吨）2座煤矿井下进行了222Rn、220Rn及220Rn子体的测量。

Radon and thoron calibration factors are 1.78 and7.63 respectively , the relative error of radon concentration ERS-2 measured is 3.0%compared to the standard radon concentration and thoron is 3.2%. We deduced theequations which can eliminate the mutual interference between radon and thoronmeasurement .

通过 ERS—2 氡析出率仪器的研究，对 ERS—2 测量析出率中道址的选择以及扣除氡钍干扰问题进行了讨论，氡道道址设置为 60—115，钍道道址设置为 119—128，氡钍的刻度系数分别选为 1.78 和 7.63，测得的氡浓度与标准氡浓度的相对误差为 3.0%，测得的钍射气浓度与标准钍射气浓度的相对误差为 3.2%。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。