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- radioactive tracer gas 放射性示踪气体
- The major difference between the two is that instead of a positron-emitting substance, SPECT uses a radioactive tracer that emits high-energy photons. 这两种技术最大的区别在于，单光子发射计算机化成像不用发射正电子的物质，而是用一个能发出高能量光子的有放射性的跟踪剂。
- Investigation on air age in a ventilated room with tracer gas technique. 用示踪气体方法研究通风房间的空气龄。
- The major difference between the two is that instead of a positron-emitting substance,SPECT uses a radioactive tracer that emits high-energy photons. 这两种技术最大的区别在于，单光子发射计算机化成像不用发射正电子的物质，而是用一个能发出高能量光子的有放射性的跟踪剂。
- The rectified de background clearance curves obtained using 133 Xe as radioactive tracer were similar to those obtained using 99m Tc as tracer. 用吸入133Xe示踪剂法得到的G负荷去本底清除曲线，经校正后，与用注射99mTc法测得的G负荷血容曲线很相似。
- When they reached a transcendental high, they were asked to pull a kite string to their right, releasing an injection of a radioactive tracer. 当他们达到超越的高度，他们被要求去拉一条风筝线到他们的右侧，释放放射性追踪器的注射剂。
- The chemical tracer, especially the perfluorocarbon tracer and sulphur hexafluoride, has been used much more popularly than the radioactive tracer nowadays. 化学示踪剂已取代放射性示踪剂在混相驱中的主导地位，其中，全氟环烷烃和六氟化硫是目前现场广泛试验和应用的化学气体示踪剂。
- Air change rate measurement for a newly renovated office with VRV system. Tracer gas (SF6) is used along with multipoint gas sampler and analyzer. 透过少量追踪气体（六氟化硫），配合多点气体采样及分析仪器，对使用可变换冷冻能力系统的新装修办公室作出换气量的测量。
- A radioactive tracer. 放射性追踪剂
- In this paper,a simple method for determination of SF6 as the mine tracer gas by Gas chromatography-Electron capture detector was developed. 建立了气相色谱-电子捕获检测器简便测定矿井示踪气体SF6的分析方法,对影响气相色谱色谱分离条件和灵敏度的操作变量进行了优化。
- The use of radioactive tracers to study biological processes. 用放射性追踪的使用来研究生物进程。
- Patients are given radioactive tracers (via an IV or inhaled as a gas) that send out signals, which are picked up and deciphered by the PET scanner. 病人通过静脉注射或者吸入的方式被给予放射性示踪剂，然后放射性示踪剂发射出的射线可以被PET探测器探测到并解码。
- Calculation of natural ventilation rates by tracer gas decay method was proposed, and definition of indoor criterion of carbon monoxide concentration limit and the carbon monoxide emission from cars were discussed. 提出了利用示踪气体法计算地下停车库的自然通风量，并论述了如何确定室内一氧化碳允许标准及小汽车的一氧化碳排放量。
- From the equation of mass balance of tracer gas, the ventilation rates of the cabin(multi room) can be solved by using sigle tracer gas measurement or multi tracer gas measurement. 通过建立示踪气体质量平衡方程式可得到用单种示踪气体和多种示踪气体浓度变化求客舱（多室）通风量和渗风量的方法。
- From the equation of mass balance of tracer gas, the ventilation rates of the cabin(multi-room) can be solved by using sigle tracer gas measurement or multi-tracer gas measurement. 通过建立示踪气体质量平衡方程式可得到用单种示踪气体和多种示踪气体浓度变化求客舱(多室)通风量和渗风量的方法。
- Additional "rays" for this purpose were discovered, including ultrasound and radioactive tracers, and contrast agents were developed to reveal previously indiscernible structures. 为了达到这一目的，除了放射线，还有超声和放射线示踪器和造影剂在揭示先前看不见的结构的过程中发展起来。
- Keywords Parkinson disease;Annexin V;apoptosis;radioactive tracer; 关键词帕金森病;膜联蛋白V;凋亡;放射性示踪剂;
- Use of tracer gas measurement in HVAC systems 示踪气体跟踪测量方法在空调通风上的应用
- Radioactive ray is material thing. 放射线是实际的物质。
- I'll refill my cigarette lighter with gas. 我将给打火机再灌满汽油。
