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显微镜科学与教学知识中心

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!
[Translate to chinese:] Structural details of the C. elegans, head in cross-section. Courtesy of Müller-Reichert T, MPI-CBG, Dresden, Germany, and McDonald K, University of California, Berkeley, USA.

高压冷冻简介

水是细胞最主要的组成部分,因此对于维持细胞超微结构至关重要。目前,冷冻固定是固定细胞成分,而不导致其显著结构变化的唯一途径。现阶段有两种常见的方法:投入冷冻与高压冷冻固定。

FRAP实验步骤式指南

漂白后荧光恢复(FRAP)已被认定为观察大分子平移扩散过程方面使用最为广泛的一种方法。由此产生的信息可用于确定动力学性质,如扩散系数、流动分数和荧光标记分子的传输速率。FRAP实验利用了短激光脉冲的荧光团辐照。先进的激光扫描显微镜如TCS…
[Translate to chinese:] Forensics microscopy

一条线索都不能少——没有显微镜,就没有法医学

没有线索,就没有犯罪。线索可能很明显,例如犯罪现场的弹壳或者门锁被撬坏的明显痕迹。然而有的时候,线索可能小到微观世界。除了经典的指纹信息,犯罪者还会留下毛发或纤维痕迹。

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…
Eukaryotic cells

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…
Blood cells. Critical Point Drying.

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。

Stem Cells in the Aging Process – the Signal Protein p53 as "Guardian of the Genome"

The physiological process of aging is an elementary part of life. The processes responsible for the aging process and the effect they have is one of the key focuses of biomedical research. Dr. Yvonne…
John B. Gurdon

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…
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