apparent half-life
简明释义
视半衰期;
英英释义
例句
1.The apparent half-life 表观半衰期 of the isotope can vary depending on environmental factors.
同位素的表观半衰期可能会因环境因素而有所不同。
2.The radioactive material has an apparent half-life 表观半衰期 of 10 days, which affects how we handle its disposal.
该放射性材料的表观半衰期为10天，这影响了我们处理其处置的方式。
3.The study found that the apparent half-life 表观半衰期 of the chemical in the soil was shorter than previously thought.
研究发现，该化学物质在土壤中的表观半衰期比之前认为的要短。
4.Researchers measured the apparent half-life 表观半衰期 of carbon-14 in ancient artifacts to date them accurately.
研究人员测量了古代文物中碳-14的表观半衰期以准确地对其进行年代测定。
5.In pharmacology, understanding the apparent half-life 表观半衰期 of a drug is crucial for determining dosing schedules.
在药理学中，理解药物的表观半衰期对于确定给药时间表至关重要。
作文
The concept of apparent half-life is critical in the fields of nuclear medicine and environmental science. It refers to the time it takes for the concentration of a substance to reduce to half its initial value when considering both its biological elimination and its physical decay. This term is particularly important when discussing radioactive isotopes used in medical treatments or diagnostic procedures. In these situations, understanding the apparent half-life allows healthcare professionals to determine how long a radioactive substance will remain active in the body and when it will be safe to perform further treatments.For instance, when a patient undergoes a procedure that involves the use of a radioactive tracer, the apparent half-life helps in planning the timing of subsequent imaging sessions. If the tracer has a short apparent half-life, it means that the tracer will be eliminated quickly from the body, reducing the risk of radiation exposure to the patient. Conversely, a longer apparent half-life indicates that the tracer will remain in the body for a more extended period, which may necessitate additional precautions.Moreover, the apparent half-life is not solely determined by the physical properties of the radioactive material; it is also influenced by biological factors such as metabolism, excretion rates, and the patient's health condition. For example, individuals with impaired kidney function may have a longer apparent half-life for certain substances due to reduced clearance rates. This variability highlights the importance of personalized medicine, where treatment plans are tailored based on individual patient characteristics.In environmental science, the apparent half-life is used to assess the persistence of pollutants in ecosystems. When studying the impact of a chemical spill, scientists may calculate the apparent half-life of the contaminant to predict how long it will take for the substance to diminish to non-toxic levels. This information is crucial for developing remediation strategies and assessing the long-term effects of pollution on wildlife and human health.In conclusion, the apparent half-life is a multifaceted concept that plays a significant role in various scientific disciplines. Its implications stretch from clinical settings to environmental assessments, underscoring the need for a comprehensive understanding of both biological and physical processes. By grasping the intricacies of the apparent half-life, professionals can make informed decisions that enhance patient safety and environmental protection.
“表观半衰期”这个概念在核医学和环境科学领域至关重要。它指的是在考虑生物排除和物理衰变的情况下，物质浓度减少到初始值一半所需的时间。这个术语在讨论用于医疗治疗或诊断程序的放射性同位素时尤为重要。在这些情况下，理解“表观半衰期”可以帮助医疗专业人员确定放射性物质在体内活跃的时间，以及何时进行进一步治疗是安全的。例如，当患者接受涉及使用放射性示踪剂的程序时，“表观半衰期”有助于规划后续成像会话的时机。如果示踪剂的“表观半衰期”较短，这意味着示踪剂将迅速从体内排出，从而降低患者的辐射暴露风险。相反，较长的“表观半衰期”表明示踪剂将在体内停留更长时间，这可能需要额外的预防措施。此外，“表观半衰期”不仅由放射性材料的物理特性决定，还受到生物因素的影响，例如新陈代谢、排泄率和患者的健康状况。例如，肾功能受损的个体可能由于清除率降低而对某些物质具有更长的“表观半衰期”。这种变异性突显了个性化医学的重要性，在这种医学中，治疗计划根据个体患者特征量身定制。在环境科学中，“表观半衰期”用于评估污染物在生态系统中的持久性。在研究化学溢出影响时，科学家可能会计算污染物的“表观半衰期”，以预测物质减少到非毒性水平所需的时间。这些信息对于制定修复策略和评估污染对野生动物和人类健康的长期影响至关重要。总之，“表观半衰期”是一个多层面的概念，在各个科学学科中发挥着重要作用。它的影响范围从临床环境到环境评估，强调了对生物和物理过程全面理解的必要性。通过掌握“表观半衰期”的复杂性，专业人员可以做出明智的决策，从而提高患者安全性和环境保护。
