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相关概念视频

Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

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Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
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相关实验视频

Updated: Sep 11, 2025

Visualizing Protein Kinase A Activity In Head-fixed Behaving Mice Using In Vivo Two-photon Fluorescence Lifetime Imaging Microscopy
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基于相位的时间域光寿命成像显微镜的量化不确定性.

Qinyi Chen1, Jongchan Park1, Shuqi Mu1

  • 1Department of Bioengineering, University of California, Los Angeles, California 90095, USA.

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概括
此摘要是机器生成的。

这项研究引入了一种新的模型,用于理解基于相机的时间域光终身成像显微镜 (FLIM) 中的噪声. 该模型量化了光子射击噪声如何影响测量,提高了FLIM在低光条件下的可靠性.

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科学领域:

  • 生物光子学 生物光子学
  • 显微镜的使用方法
  • 频谱学是一种光谱学.

背景情况:

  • 阶段分析是时间域光终身成像显微镜 (FLIM) 的无合适方法.
  • 在FLIM的定量准确性受到噪声的限制,特别是光子射击噪声,影响寿命和脱混合.
  • 了解噪声传播对于可靠的FLIM数据至关重要.

研究的目的:

  • 为基于相位的时间域FLIM开发一个理论不确定性模型.
  • 为了分析捕捉光子射击噪声对FLIM测量的影响.
  • 为了提高基于相机的FLIM的定量准确性和可靠性.

主要方法:

  • 开发了一个基于相位的时间域FLIM的理论不确定性模型.
  • 分析模拟了光子射击噪声的传播.
  • 使用蒙特卡洛模拟和来自染料和生物组织的实验数据验证了模型.

主要成果:

  • 该模型准确地捕捉了射击噪声在相位坐标中的传播.
  • 量化噪声对光体重量估计的影响.
  • 在光子有限的成像场景中证明了提高可靠性.

结论:

  • 开发的不确定性模型提高了基于相位的时间域FLIM的可靠性.
  • 这种方法对于光子有限的成像应用特别有利.
  • 该模型提供了对FLIM中的噪声限制的定量理解.