显微镜知识库 | 徕卡显微系统

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！

Dronpa chromophore

光激活、光转化和光控开关荧光蛋白

荧光蛋白（FP）如GFP、YFP或DsRed都是可视化观察活细胞中细胞组分的强大工具。尽管如此，目前仍然会有传统FP达到极限的情形发生。普通FP无法观察特定兴趣蛋白中专有、空间有限的蛋白质群体，因为它们在整个细胞中都有表达。此时，光激活、光转化和光控开关荧光蛋白就登上了舞台。荧光套件中的成员可以从非荧光状态激活，可以改变发射光谱，甚至可以逆转式地“开启和关闭”。借助这些“光学荧光笔”，研究人员可以…

Left: Tissue cells marked with an immunolabel (FITC) illuminated with wide-band UV excitation. Note the tissue structure with blue autofluorescence. Right: Same tissue and same immunostaining with FITC label illuminated with epi-illumination using narrow-band blue (490 nm) light. Note the increased image contrast (Ploem, 1967)

Milestones in Incident Light Fluorescence Microscopy

Since the middle of the last century, fluorescence microscopy developed into a bio scientific tool with one of the biggest impacts on our understanding of life. Watching cells and proteins with the…

Left: Tissue cells marked with an immunolabel (FITC) illuminated with wide-band UV excitation. Note the tissue structure with blue autofluorescence. Right: Same tissue and same immunostaining with FITC label illuminated with epi-illumination using narrow-band blue (490 nm) light. Note the increased image contrast (Ploem, 1967)

Milestones in Incident Light Fluorescence Microscopy

Since the middle of the last century, fluorescence microscopy developed into a bio scientific tool with one of the biggest impacts on our understanding of life. Watching cells and proteins with the…

Gene editing with Cas9

Gene Editing with CRISPR/Cas9 - Breakthrough in Genome Engineering

The CRISPR/Cas9 system is one of several different bacterial systems for defense against viral attacks. It consists of two main components. One is a small piece of RNA which binds to the viral target…

C. elegans

研究秀丽隐杆线虫（C. elegans）

对于在研究实验室或教室中使用秀丽隐杆线虫（C. elegans）的科学家、技术人员和教师，本报告旨在提供有用的信息，以帮助改进他们的日常工作。其目的是使拾取虫体、转基因、RNA干扰、筛选和功能成像等工作步骤更加高效。本报告还详细介绍了配置研究虫实验室或生物教室/教学实验室的各种可能性，并解释了有关研究虫体方法的内容。

荧光显微镜光学滤光器手册

荧光显微镜和其他基于光的应用需要具有严格光谱和物理特性的光学滤光器。这些特性通常是特定于应用的，适合并且最佳的光学器件在另一种应用中可能不适用且效果不佳。

Exchange a fluorescence bulb.

视频教程：如何更换荧光光源的灯泡

在生物应用中使用荧光显微镜时，带有汞灯的灯罩是最常见的光源。本视频教程展示了如何更换传统荧光光源的灯泡。

Center a fluorescence bulb.

视频教程：如何调节荧光光源的灯泡位置

荧光激发的传统光源是带汞灯的荧光灯管。实现明亮均匀激发的前提条件是灯泡在灯罩内正确对中和对齐。本视频教程介绍了一种简易的方法，用于调节荧光灯管中的汞灯的位置。

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…