显微镜知识库

显微镜知识库

显微镜知识库

徕卡显微系统的知识库提供有关显微镜学科的科学研究和教学材料。内容旨在对显微镜初学者、有经验的显微镜操作实践者和使用显微镜的科学家在他们的日常工作和实验有所帮助。这里有探索交互式教程和应用笔记,你可以找到你需要的显微镜的基础知识以及前沿技术——快来加入徕卡显微知识社区,分享您的专业知识!

Image Processing for Widefield Microscopy

Fluorescence microscopy is a modern and steadily evolving tool to bring light to current cell biological questions. With the help of fluorescent proteins or dyes it is possible to make discrete…
[Translate to chinese:] Live cell imaging, 4 colors: Mitochondria (MitoView Green, yellow) and actin (mNeonGreen, cyan) microtubuli (SIR-tubulin, magenta), endosomes (NIR750, green). Processed with DSE and DSE powered by Aivia.

白激光

在生物医学应用中,共聚焦显微镜的完美光源它应该有足够的强度,可调谐的波长,以便同时激发一系列样品。此外,它应该成为荧光寿命实验的脉冲光源。这样的光源已经出现:白激光。它采用高能脉冲红外光纤激光器经过光子晶体光纤以产生连续光谱。通过声光调制滤片从该连续光谱中选择窄带激光。

Controlling the TIRF Penetration Depth is Mandatory for Reproducible Results

The main feature of total internal reflection fluorescence (TIRF) microscopy is the employment of an evanescent wave for the excitation of fluorophores instead of using direct light. A property of the…

冷发光基础原理

自然界中有许多发光过程。冷发光是一系列发光现象的统称,是指不因高温而引发的发光事件。本文描述了不同形式的冷光并对荧光进行了详细介绍。在第二部分解释了描述荧光色素的相关技术术语,如淬灭、漂白或量子效率,以便对荧光分子的基础特性有更深入的了解。
TIRF Image of Tubulin, YFP, penetration depth: 120 mm

Applications of TIRF Microscopy in Life Science Research

The special feature of TIRF microscopy is the employment of an evanescent field for fluorophore excitation. Unlike standard widefield fluorescence illumination procedures with arc lamps, LEDs or…
TIRF image of brest carcinoma tumor cells expressing GFP tagged cell adhesion Molecule CD44 that is expressed on the cell membrane, imagined in TIRF.

Total Internal Reflection Fluorescence (TIRF) Microscopy

Total internal reflection fluorescence (TIRF) is a special technique in fluorescence microscopy developed by Daniel Axelrod at the University of Michigan, Ann Arbor in the early 1980s. TIRF microscopy…
[Translate to chinese:] Jellyfish Aequorea Victoria

荧光蛋白--从起步到诺贝尔奖

荧光蛋白是近代荧光显微技术及其现代应用的基础。荧光蛋白的发现和随之而来的发展是上世纪生命科学领域最激动人心的创新之一,也是破译无数自然现象的起点。

Fluorescence Recovery after Photobleaching (FRAP) and its Offspring

FRAP (Fluorescence recovery after photobleaching) can be used to study cellular protein dynamics: For visualization the protein of interest is fused to a fluorescent protein or a fluorescent dye. A…

福斯特共振能量转移 (FRET)

荧光描述的是分子或原子在通过光的吸收激发电子系统后,自发发射光子的过程。发射的光子通常能量较低,因此波长较长(斯托克斯位移)。例如,蓝光激发可能导致绿色发射。如果第二个荧光分子能够吸收绿色光子,则该分子的发射再次发生斯托克斯位移,例如变为红色。这种再吸收在浓密样品中会导致测量误差(部分“内滤”效应)。在低浓度样品中,再吸收非常罕见。
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