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Multi-Wavelength Epi-Illumination in Fluorescence Microscopy
Fluorescence is a process where a substance after having absorbed light (photons) emitts a radiation the wavelength (colour) of which is longer than that of the absorbed light, and where this…Read article
An Introduction to Fluorescence
Fluorescence is widely used in microscopy and an important tool for observing the distribution of specific molecules. Most molecules in cells do not fluoresce. They therefore have to be marked with…Read article
Applications, Labeling Strategies and Fluorophores for Super-Resolution
The free online webinar on super-resolution presented by Leica Microsystems in association with Microscopy & Analysis took place on Tuesday, 15 November 2011. Register and view the webinar on demand.Read article
Modern Fluorescent Proteins and their Biological Applications
Here we present two review articles on fluorescent proteins and their biological applications. These first article reviews our current knowledge of blue, green, and red chromophore formation in…Read article
Ratiometric Imaging
Many fundamental functions of a cell strongly depend on delicate, but nevertheless dynamic balances of ions (e.g. calcium, magnesium), voltage potentials and pH between the cell’s cytosol and the…Read article
Basic Principles of Luminescence
There are a lot of light-emitting processes occurring in nature. Luminescence is an umbrella term for those kinds of events where light emission is not the result of high temperatures. This article…Read article
Fluorescent Dyes
A basic principle in fluorescence microscopy is the highly specific visualization of cellular components with the help of a fluorescent agent. This can be a fluorescent protein – for example GFP –…Read articleWidefield Super-Resolution with GSDIM
Great advancements in biology have been possible by using fluorescence microscopy. So far, the resolution of the images was limited due to physical constraints. In the past couple of years, new…Read article
Step by Step Guide for FRAP Experiments
Fluorescence Recovery After Photobleaching (FRAP) has been considered the most widely applied method for observing translational diffusion processes of macromolecules. The resulting information can be…Read article
Handbook of Optical Filters for Fluorescence Microscopy
Fluorescence microscopy and other light-based applications require optical filters that have demanding spectral and physical characteristics. Often, these characteristics are application-specific and…Read article
The Force of the Dark Side – Embedding Media for GSDIM Super-Resolution Localization Microscopy
Super-resolution microscopy such as Stimulated Emission Depletion (STED) and single-molecule based techniques rely on the same principle for breaking the diffraction limit: the unwanted fluorescence…Read article
Spectral and Structural Comparison Between Bright and Dim Green Fluorescent Proteins in Amphioxus
The cephalochordate Amphioxus naturally co-expresses fluorescent proteins (FPs) with different brightness, which thus offers the rare opportunity to identify FP molecular feature/s that are associated…Read article
How to Prepare Your Specimen for Immunofluorescence Microscopy
Immunofluorescence (IF) is a powerful method for visualizing intracellular processes, conditions and structures. IF preparations can be analyzed by various microscopy techniques (e.g. CLSM,…Read article
STED Nanoscopy with Fluorescent Quantum Dots
The widely popular class of quantum-dot molecular labels could so far not be utilized as standard fluorescent probes in STED (stimulated emission depletion) nanoscopy. This is because broad…Read article
Fluorescent Proteins Illuminate Cell Biology
Green fluorescent protein (GFP) isolated from the jellyfish Aequorea victoria and GFP-like fluorescent proteins from other animals have had an important role in the technical innovations that have…Read article
Video Talk by Roger Tsien: Fluorescent Proteins
Live cell imaging has been revolutionized by the discovery of the green fluorescent protein (GFP). This lecture covers the history of GFP, how it folds and becomes fluorescent, how it has been mutated…Read article
Highly Selective Fluorescent and Colorimetric Probe for Live-cell Monitoring of Sulphide Based on Bioorthogonal Reaction
H2S is the third endogenously generated gaseous signaling compound and has also been known to involve a variety of physiological processes. To better understand its physiological and pathological…Read article
Video Talk by Roger Tsien: Fluorescent Protein Indicators
In this talk, Roger Tsien discusses how fluorescent proteins have been turned into indicators for a wide variety of biological molecules, including pH, ions, redox potential, and signaling molecules…Read article
Measuring the 3D STED-PSF with a new Type of Fluorescent Beads
A new type of fluorescent bead is presented by GATTAquant. These beads, called GATTA-Beads, are characterized by a small diameter (23 nm), high intensity and size uniformity. In combination with…Read article
Abstracts of the 6th European Super-Resolution User-Club Meeting
The 6th European Super-Resolution User Club Meeting was held in collaboration with Dr. Timo Zimmermann, CRG, and Dr. Pablo Loza-Alvarez, ICFO, Barcelona. According to the founding principle of the…Read article
Multispectral Phloem-Mobile Probes: Properties and Applications
Using Arabidopsis (Arabidopsis thaliana) seedlings, we identified a range of small fluorescent probes that entered the translocation stream and were unloaded at the root tip. These probes had…Read article
Chronic Inflammation Under the Microscope
In the course of chronic inflammation certain body areas are recurrently inflamed. This goes along with many human diseases. With the help of widefield light microscopy, the underlying processes can…Read article
Testing the Münch Hypothesis of Long Distance Phloem Transport in Plants
Long distance transport in plants occurs in sieve tubes of the phloem. The pressure flow hypothesis introduced by Ernst Münch in 1930 describes a mechanism of osmotically generated pressure…Read article
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…Read article
The Fundamentals and History of Fluorescence and Quantum Dots
At some point in your research and science career, you will no doubt come across fluorescence microscopy. This ubiquitous technique has transformed the way in which microscopists can image, tag and…Read article
Abstracts of the 7th European Super-Resolution User-Club Meeting
The 7th Super-Resolution User Club Meeting was held in collaboration with Prof Pavel Hozák , at the Institute of Molecular Genetics of the ASCR in Prague. Keeping the event close to science is one of…Read article
The Guide to STED Sample Preparation
This guide is intended to help users optimize sample preparation for stimulated emission depletion (STED) nanoscopy, specifically when using the TCS SP8 STED 3X nanoscope from Leica Microsystems. It…Read article
Infection of the novel coronavirus SARS-CoV-2 can be blocked by a human monoclonal antibody
Vaccines and targeted therapeutics for treatment of the respiratory disease COVID-19, caused by the coronavirus SARS-CoV-2, are currently lacking. Based on the results of this study, it was reported…Read article