Leica Microsystems: 显微镜科学与教学知识中心

显微镜科学与教学知识中心

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！

Perusing Alternatives for Automated Staining of TEM Thin Sections

Contrast in transmission electron microscopy (TEM) is mainly produced by electron scattering at the specimen: Structures that strongly scatter electrons are referred to as electron dense and appear as…

Widefield Calcium Imaging with Calcium Indicator Fura2

In eukaryotic cells Ca2+ is one of the most widespread second messengers used in signal transduction pathways. Intracellular levels of Ca2+ are usually kept low, as Ca2+ often forms insoluble…

临界点干燥简要介绍

临界点干燥程序是在SEM应用中对精密样本实施干燥的有效方法。临界点干燥保全了样本的表面结构，否则，当样本从液态变为气态时可能会因为表面张力而导致表面结构受破坏。在过去，临界点干燥是一个耗时的过程，由于手动操作太多造成了样本的重现性较低。许多生物样本通常在干燥前通过固定和脱水制备，干燥后进行金、铂或钯等金属镀膜使其表面导电，这样才能方便开展SEM分析。

[Translate to chinese:] QTM B, 1963, the first commercial automated image analysis system for microscope images, based on a TV camera and developed by Metals Research in Cambridge, England.

图像分析 50 年

现代图像分析系统对来自自动显微镜和数码相机的图像执行高度复杂的图像处理功能。50 年前，第一套图像分析系统是模拟系统，以摄像机为基础，面积测量可通过仪表读取。不过，它标志着这一领域自动化的开端。

Nobel Prize 2012 in Physiology or Medicine for Stem Cell Research

The Nobel Prize recognizes two scientists who discovered that mature, specialised cells can be reprogrammed to become immature cells capable of developing into all tissues of the body. Their findings…

[Translate to chinese:] 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。

[Translate to chinese:] 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。

Fluorescence Correlation Spectroscopy (FCS)

Fluorescence correlation spectroscopy (FCS) measures fluctuations of fluorescence intensity in a sub-femtolitre volume to detect such parameters as the diffusion time, number of molecules or dark…

CARS image of cellulose fibers. The fibers are visualized through the C–H vibrations of the polyglucan chains in cellulose.

CARS Microscopy: Imaging Characteristic Vibrational Contrast of Molecules

Coherent anti-Stokes Raman scattering (CARS) microscopy is a technique that generates images based on the vibrational signatures of molecules. This imaging methods does not require labeling, yet…