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相关概念视频

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Direct methods for measuring microbial populations in a culture are essential tools in microbiology, providing quantitative data for various applications. Among these, microscopic counts, plate counts, and serial dilution are widely used techniques, each with unique principles and applications.Microscopic CountsMicroscopic counting involves the use of a Petroff-Hausser chamber, a specialized microscope slide with a grid and defined depth. By observing a liquid culture under a microscope,...
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Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis
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一种准确的尺寸概率分布方法,用于将微塑料数量转换为质量.

Hongyu Chen1,2,3, Jianguo Tao1,2,3, Teng Wang4

  • 1School of Geography and Ocean Science, Nanjing University, Nanjing 210093, China.

Environmental science & technology
|December 25, 2025
PubMed
概括

估计微塑料 (MP) 质量对于环境研究至关重要. 一种新的尺寸概率分布方法从粒子计数中准确计算MP质量,在缺少详细数据时提供可靠的替代方案.

关键词:
长江流域的长江流域微塑料污染 微塑料污染监测方法 监测方法颗粒大小分布 粒子大小分布体积密度转换的体积密度转换.

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科学领域:

  • 环境科学 环境科学
  • 分析化学 分析化学
  • 聚合物科学 聚合物科学

背景情况:

  • 微塑料 (MP) 质量对于环境命运和运输研究至关重要.
  • 目前估计MP质量的方法有限,特别是没有详细的形态数据.

研究的目的:

  • 开发和验证一种可靠的方法,用颗粒计数数据来估计微塑料质量.
  • 整合尺寸分布特征与体积密度模型,以准确量化质量.

主要方法:

  • 开发了一种尺寸概率分布方法,将基于条件碎片分布 (CFD) 的尺寸模型与体积近似相结合.
  • 该方法的最佳配置是通过评估从平衡和质谱学的测量质量数据来确定的.
  • 性能与基于系数的转换和直接体积密度计算进行了比较.

主要成果:

  • 与基于系数的转换方法相比,建议的尺寸概率分布方法显示出更高的性能.
  • 该方法的准确性与直接的体积密度计算相美.
  • 应用于长江数据,每年微塑料质量流量在1950.00至12655.58之间 (平均6895.90±3763.24).

结论:

  • 开发的方法提供了一种可靠和高效的方法,用于从粒子计数数据中估计微塑料质量.
  • 它在各种微塑料大小类别中提供了准确和可比的质量估计.
  • 这种技术增强了对水生环境中微塑料污染动态的理解.