effective half life

简明释义

有效半衰期

英英释义

例句

1.The effective half life of the radioactive isotope is crucial for determining how long it will remain hazardous.

放射性同位素的有效半衰期对于确定它将保持危险的时间至关重要。

2.The effective half life of a substance can be affected by environmental factors.

物质的有效半衰期可能会受到环境因素的影响。

3.Radiologists must calculate the effective half life when planning treatment with radioactive materials.

放射科医生在计划使用放射性材料的治疗时必须计算有效半衰期。

4.In pharmacology, understanding the effective half life of a drug helps in scheduling doses.

在药理学中，了解药物的有效半衰期有助于安排剂量。

5.The effective half life of carbon-14 is about 5730 years, making it useful for dating ancient artifacts.

碳-14的有效半衰期约为5730年，使其在古代文物定年中非常有用。

作文

The concept of effective half life is crucial in various scientific fields, particularly in nuclear physics and medicine. It refers to the time it takes for a substance to reduce to half its initial amount, considering both its physical decay and biological elimination processes. To understand this concept better, we can look at how it applies in different scenarios. For instance, when a radioactive isotope is introduced into the body for medical imaging or treatment, its effective half life determines how long it will remain active in the system and how quickly it will be eliminated. This is important because it affects the dosage and timing of treatments, ensuring that patients receive the most effective care while minimizing potential side effects.In the context of radiation therapy, the effective half life plays a vital role in planning treatment schedules. Doctors must consider both the physical half-life of the radioactive material and the biological half-life, which is the time it takes for the body to eliminate the substance. For example, if a certain isotope has a physical half-life of 10 days but is expelled from the body within 5 days, the effective half life would be shorter than the physical half-life. This knowledge allows healthcare professionals to optimize treatment intervals, ensuring that the maximum amount of radiation reaches cancer cells while minimizing exposure to healthy tissues.Moreover, the effective half life is not only relevant in medicine but also in environmental science. When pollutants are released into the environment, understanding their effective half life helps scientists predict how long these substances will remain hazardous. For instance, certain chemicals may degrade rapidly in the environment but have a longer biological half-life in organisms. By calculating the effective half life, researchers can assess the potential risks to ecosystems and human health, guiding regulatory decisions and cleanup efforts.In summary, the effective half life is a multifaceted concept that bridges various disciplines, highlighting the interplay between decay processes and biological elimination. Its importance in medicine cannot be overstated, as it directly impacts patient care and treatment efficacy. Furthermore, its relevance in environmental science underscores the need for interdisciplinary approaches to address complex issues related to pollution and sustainability. As we continue to advance our understanding of these processes, the effective half life will remain a key factor in shaping future research and applications across different fields.

“有效半衰期”这一概念在多个科学领域中至关重要，尤其是在核物理和医学中。它指的是一种物质减少到其初始量一半所需的时间，同时考虑其物理衰变和生物排除过程。为了更好地理解这个概念，我们可以看看它在不同场景中的应用。例如，当放射性同位素被引入体内用于医学成像或治疗时，其“有效半衰期”决定了它在体内保持活跃的时间以及多快会被排除。这一点非常重要，因为它影响剂量和治疗时间的安排，确保患者在尽量减少潜在副作用的同时能够接受最有效的护理。在放射治疗的背景下，“有效半衰期”在治疗计划中起着至关重要的作用。医生必须考虑放射性物质的物理半衰期和生物半衰期，即身体排除该物质所需的时间。例如，如果某种同位素的物理半衰期为10天，但在5天内就被排出体外，那么“有效半衰期”就会比物理半衰期短。这一知识使医疗专业人员能够优化治疗间隔，确保最大量的辐射作用于癌细胞，同时将对健康组织的暴露降到最低。此外，“有效半衰期”不仅在医学中相关，在环境科学中也同样重要。当污染物释放到环境中时，了解它们的“有效半衰期”有助于科学家预测这些物质会在多长时间内保持危害。例如，某些化学物质在环境中可能迅速降解，但在生物体内的生物半衰期较长。通过计算“有效半衰期”，研究人员可以评估对生态系统和人类健康的潜在风险，从而指导监管决策和清理工作。总之，“有效半衰期”是一个多方面的概念，连接了多个学科，突显了衰变过程与生物排除之间的相互作用。它在医学中的重要性不言而喻，因为它直接影响患者护理和治疗效果。此外，它在环境科学中的相关性强调了应对污染和可持续性等复杂问题需要跨学科的方法。随着我们对这些过程理解的不断深入，“有效半衰期”将继续成为塑造未来各领域研究和应用的关键因素。