radionuclides

简明释义

英[ˌreɪdɪəʊˈnjuːklaɪdz]美[ˌreɪdiəˈnuːklaɪdz]

n. [核]放射性核素；辐射种核（radionuclide 的复数形式）

英英释义

单词用法

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例句

1.Using this amplifier in a liquid scintillation counting device, absolute measurements of the activity of some radionuclides have been realized.

在液闪计数装置中采用这种对数放大器实现了对一些放射性核素活度的绝对测量。

2.The annual in takes of 6 radionuclides and resultant committed dose equivalents to the inhabitants were estimated.

估算了该地区居民对6种放射性核素的年摄入量和有效剂量当量。

3.The main radionuclides representing health risk are radioactive caesium and radioactive iodine.

意味着健康威胁的主要的放射性核素包括放射性铯和放射性碘。

4.Migration of radionuclides in geologic media is controlled by not only convection-dispersion effect but also many chemical processes.

放射性核素在地质介质中的迁移，除了受到地下水的对流-弥散作用外，还受到地下水中多种化学作用的影响。

5.Based on the public health risk evaluation method , the health risks due to thegaseous effluents of chemicals and radionuclides from a typical coal-fired power plant are evaluated.

利用公众健康危害评价方法，计算了一个较典型的燃煤电厂气载释放的化学污染物质及放射性物质对人体产生的健康危害。

6.These radionuclides undergo radioactive decay, by emitting harmful alpha particles, beta particles or gamma rays.

它们在衰变期间会放出对人体有害的粒子粒子或射线。

7.The presence of radionuclides in soils often jeopardizes ecosystem stability and renders a serious risk to human health.

放射性核素常危及生态系统的稳定，给人类的生命和健康带来巨大的威胁。

8.The presence of radionuclides in groundwater can indicate contamination from nuclear facilities.

地下水中存在的放射性核素可能表明来自核设施的污染。

9.In medical imaging, doctors often use radionuclides to diagnose diseases.

在医学成像中，医生通常使用放射性核素来诊断疾病。

10.Research on radionuclides helps scientists understand the effects of radiation on human health.

对放射性核素的研究帮助科学家了解辐射对人类健康的影响。

11.Some radionuclides are used in cancer treatment to target and destroy tumor cells.

一些放射性核素用于癌症治疗，以靶向并摧毁肿瘤细胞。

12.Nuclear power plants monitor radionuclides to ensure safety and prevent leaks.

核电站监测放射性核素以确保安全并防止泄漏。

作文

Radionuclides, also known as radioactive isotopes or radioisotopes, are atoms that have an unstable nucleus and emit radiation in the form of alpha particles, beta particles, or gamma rays as they decay. These emissions can be harnessed for various applications, ranging from medical treatments to energy production. Understanding radionuclides (放射性核素) is crucial in many scientific fields, including nuclear physics, chemistry, and environmental science.One of the most significant uses of radionuclides (放射性核素) is in the medical field, particularly in diagnosing and treating diseases. For instance, technetium-99m is a widely used radionuclide (放射性核素) in nuclear medicine for imaging and functional studies of organs. It allows doctors to visualize areas of the body that may be affected by disease, providing vital information for diagnosis and treatment planning. Additionally, certain radionuclides (放射性核素) are employed in targeted radiation therapy for cancer treatment, where they help to destroy malignant cells while minimizing damage to surrounding healthy tissue.In environmental science, radionuclides (放射性核素) play a significant role in understanding natural processes and human impact on ecosystems. For example, the study of naturally occurring radionuclides (放射性核素) like uranium and radon helps scientists assess radiation exposure risks and the health effects associated with living near uranium mines or areas with high radon levels. Furthermore, radionuclides (放射性核素) can be used as tracers to study sediment transport and erosion in rivers and coastal regions, providing insights into geological processes over time.The energy sector also benefits from the properties of radionuclides (放射性核素). Nuclear power plants utilize uranium-235 and plutonium-239 as fuel sources. These radionuclides (放射性核素) undergo fission reactions to release a tremendous amount of energy, which is then converted into electricity. Despite the controversies surrounding nuclear energy, it remains a significant part of the global energy mix, providing a low-carbon alternative to fossil fuels.However, the use of radionuclides (放射性核素) comes with challenges and risks. The handling and disposal of radioactive materials require strict regulations and safety measures to protect human health and the environment. Accidental releases of radionuclides (放射性核素) can lead to severe consequences, as seen in incidents like the Chernobyl disaster and the Fukushima Daiichi nuclear accident. These events highlight the importance of rigorous safety protocols and public awareness regarding the potential dangers associated with radionuclides (放射性核素).In conclusion, radionuclides (放射性核素) are essential components in various fields, offering both benefits and challenges. Their applications in medicine, environmental science, and energy production underline their significance in modern society. As research continues to advance our understanding of radionuclides (放射性核素), it is vital to balance their use with safety measures to ensure a sustainable and safe future.