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相关概念视频

Mechanistic Models: Overview of Compartment Models01:21

Mechanistic Models: Overview of Compartment Models

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Mechanistic models, a category encompassing both physiological and compartmental modeling, differ from empirical models' approaches to incorporating known factors about the systems being modeled. Empirical models describe data with minimal assumptions, while mechanistic models aim to provide a robust description of available data by specifying assumptions and integrating known factors about the system. Compartmental analysis is a key example of a mechanistic model in pharmacokinetics and...
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Mechanistic Models: Compartment Models in Individual and Population Analysis01:23

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Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...
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Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

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Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
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Chronic pharyngitis refers to persistent inflammation of the pharyngial mucosa.
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
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Introduction
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
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Pancreatitis is inflammation of the pancreas, an organ located behind the stomach. It can be either acute or chronic.
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通过沉积物毒动力学-毒动力学建模进行机械急性-慢性推断.

Wenze Xiao1, Stuart L Simpson2, Qiao-Guo Tan1

  • 1Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, State Key Laboratory of Marine Environmental Science, Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China.

Environmental science & technology
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PubMed
概括

这项研究开发了一种机理性毒动力学-毒动力学 (TKTD) 模型,以预测长期污染影响. 该模型准确地将急性毒性数据推断为的慢性影响,为风险评估提供可靠的急性-慢性比率 (ACR).

关键词:
这是ACR ACR.鲁迪塔佩斯 菲律宾 罗马在 TKTDD 找 TKTD评估生态风险 评估生态风险超值推算的方法

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科学领域:

  • 环境毒理学环境毒理学
  • 生态毒理学 生态毒理学
  • 风险评估 风险评估 风险评估

背景情况:

  • 生态风险评估通常依赖于推断短期实验室数据来预测长期污染影响.
  • 准确的推断需要了解毒动力学-毒动力学 (TKTD) 过程,并得出急性-慢性比率 (ACR).

研究的目的:

  • 开发和验证一种机械TKTD建模框架,用于导出沉积物生物中的ACR.
  • 将框架应用于暴露在沉积物相关铜 (Cu) 的底层鱼Ruditapes philippinarum.

主要方法:

  • 开发了一个基于沉积物的TKTD模型,使用从水性毒性测试中获得的生理参数.
  • 使用薄膜 (DGT) 的扩散梯度来量化沉积物中的Cu生物可用性.
  • 与观察到的Cu积累和毒性数据对比验证的模型预测.

主要成果:

  • 该TKTD模型准确地预测了组织中的Cu积累,与观察到的毒性差异最小 (10%).
  • 17的ACR被确定为Cu诱导的死亡率.
  • 该框架成功地获得了 (11-87) 和纳米塑料颗粒 (1.9-69) 的ACR,并阐明了环境对ACR的影响.

结论:

  • TKTD建模提供了一种透明和可重现的机制方法,用于从急性毒性到慢性毒性的推断.
  • 该框架通过改进对长期污染影响的预测来加强生态风险评估.
  • 该研究强调了TKTD模型在理解污染物生物利用率和环境因素影响方面的有用性.