查询词典 radioactivity

The depthmen will measure cosmic ray penetration of the sea, radioactivity, and the age of the water in the abyss.

深入海底的人将在深海测量宇宙射线对海水的穿透力、放射性活动，以及海水的年龄。

The depthmen will measure cosmic ray penetration of the sea, radioactivity, the age of the water in the abyss.

深入海底的人将在深海测量宇宙射线对海水的穿透力、放射性活动，以及海水的年龄。

The decay of ~(99m)Tc source was used to verify experimentally that in the measurement of the number of atoms of a radioactive isotope in a sample at time t_0, the error introduced through the inaccuracy of its decay constant can be reduced to a much smaller value by the careful selection of the time of measurement or measurements of its radioactivity at around one life time (1/λ) after t_0 and doing the calculation.

本文用~(99m)Tc源的衰变实验证明了：在测量一个样品中在t_0时的一种放射性同位素的原子数时只需精心选择一次或多次测量其放射性的时刻在t_0后约该同位素的一个寿期(1/λ)，并进行计算，则由它的衰变常数或其半衰期(T1/2)的不准确性而引进的误差可以被降低到较小值。

Basic nuclear physics and fundamental measuring techniques: The basic nuclear physics involves the main types of nuclear decay, law of decay, definition and units of radioactivity and the interaction of radiations and materials.

核物理基础与放射性测量技术：内容主要是核衰变的四种类型、衰变规律、放射性活度及其单位；射线与物质的相互作用，以及γ计数器及液体闪烁仪测量的基本原理和放射性测量的统计误差。

However, for those facilities, which has been shut down or waiting for decommission, the increasing of radioactivity of these nuclides in the air may indicate the restart of the facilities.

对于退役、停产和关闭的反应堆和后处理厂，监测环境中是否存在~(41)Ar、~(85)Kr和~(133)Xe，能够及时、直接证明这类设施是否重新启动了。

Noctilucent powder is high-temperature resistant, corrosion resistant, not deliquescence, has stable performance, long use life, is nontoxic, has no radioactivity. It can be used extensively in many areas of production and lives.

夜光粉耐高温、耐腐蚀、不潮解、性能稳定、使用寿命长、无毒、无放射性，可广泛应用生产和生活诸多领域。

Methods: TOCA was labeled with (superscript 99m)Tc using HYNIC as bifunctional chelator, EDDA and trieine as coligand. The nude mice bearing human small cell lung cancer underwent static whole body planar imaging after the injection of (superscript 99m)Tc-HYNIC-TOCA or (superscript 99m)Tc-P829. ROIs were drawn and the radioactivity ratios of target to non-target were calculated in every planar imaging. The dynamic biodistribution study was operated in Kunming mice and the percent uptake ratios of two imaging agents in different tissue at different time were measured.

以HYNIC为双功能螯合剂(bifunctional chelator， BFC)，乙二胺－N，N'-二乙酸和三甲基甘氨酸为协同配体进行TO-CA的(上标 99m)Tc标记；以(上标 99m)Tc-HYNIC-TOCA和(上标 99m)Tc-P829为显像剂，对荷人类小细胞肺癌裸鼠进行显像，通过感兴趣区技术进行半定量分析，计算并比较两种显像剂的靶/非靶比值；在昆明鼠体内进行动态生物学分布实验，测定并比较不同时点两种显像剂在各脏器的克组织百分摄取率。

It was succeed keys to treat and nurse of esophagitis of radioactivity.

结论放射性食管炎的治疗和护理，是放疗成败的关键。

However, unlike the simple exponential that describes radioactivity, which has only one variable, a stretched exponential describes a process controlled by several independent factors.

不过，与只有一个变量的放射性简单指数不同的是，延伸型指数函数描述的是被几个独立因素控制的过程。

Case critical person push with flatcar send into rescue room, inform a doctor. Brief inquiry patient or family member bosom are painful begin time, place, property, have ache without radioactivity, aching degree reachs duration, use medical case by oneself, alleviate means, have wait for inducement without fatigue, rage, nervous, cold, gorge, have toward medical history already without hypertensive, tall lipemia, diabetic etc.

简要询问患者或家属胸痛开始时间、部位、性质，有无放射性疼痛，疼痛程度及持续时间，自行用药情况，缓解方式，有无疲惫、情绪激动、紧张、严寒、饱食等诱因，既往病史有无高血压、高脂血症、糖尿病等。

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。