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Fluorescence microscopy image of liver tissue where DNA in the nuclei are stained with Feulgen-pararosanilin and visualized with transmitted green light.

Epi-Illumination Fluorescence and Reflection-Contrast Microscopy

This article discusses the development of epi-illumination and reflection contrast for fluorescence microscopy concerning life-science applications. Much was done by the Ploem research group…
Neurons imaged with DIC contrast.

Differential Interference Contrast (DIC) Microscopy

This article demonstrates how differential interference contrast (DIC) can be actually better than brightfield illumination when using microscopy to image unstained biological specimens.

Phasenkontrast und Mikroskopie

Dieser Artikel erklärt den Phasenkontrast, eine optische Mikroskopietechnik, die feine Details von ungefärbten, transparenten Proben sichtbar macht, die mit gewöhnlicher Hellfeldbeleuchtung schwer zu…

Immersion Objectives

How an immersion objective, which has a liquid medium between it and the specimen being observed, helps increase the numerical aperture and microscope resolution is explained in this article.
When particulate contamination is present in lubricating fluids or oils, it can cause damage to parts or components leading to malfunctions.

Hydraulics in the Automotive and Aerospace Industries

Cleanliness standards relating to lubricants, hydraulic fluids, and oils, e.g., ISO 4406 and DIN 51455 are discussed in this article. Cleanliness plays a central role in the automotive and…
Mouse lung sections

Studying Pulmonary Fibrosis

The results shown in this article demonstrate that fibrotic and non-fibrotic regions of collagen present in mouse lung tissue can be distinguished better with polarized light compared to brightfield.…

Factors to Consider When Selecting a Research Microscope

An optical microscope is often one of the central devices in a life-science research lab. It can be used for various applications which shed light on many scientific questions. Thereby the…

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…
Steps of Koehler Illumination

Koehler Illumination: A Brief History and a Practical Set Up in Five Easy Steps

In this article, we will look at the history of the technique of Koehler Illumination in addition to how to adjust the components in five easy steps.
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…
Center a fluorescence bulb.

Video Tutorial: How to Align the Bulb of a Fluorescence Lamp Housing

The traditional light source for fluorescence excitation is a fluorescence lamp housing with mercury burner. A prerequisite for achieving bright and homogeneous excitation is the correct centering and…
Exchange a fluorescence bulb.

Video Tutorial: How to Change the Bulb of a Fluorescence Lamp Housing

When applying fluorescence microscopy in biological applications, a lamp housing with mercury burner is the most common light source. This video tutorial shows how to change the bulb of a traditional…
Jellyfish Aequorea Victoria

Fluorescent Proteins - From the Beginnings to the Nobel Prize

Fluorescent proteins are the fundament of recent fluorescence microscopy and its modern applications. Their discovery and consequent development was one of the most exciting innovations for life…
Section taste buds rabbit, differential interference contrast microscope

Optical Contrast Methods

Optical contrast methods give the potential to easily examine living and colorless specimens. Different microscopic techniques aim to change phase shifts caused by the interaction of light with the…
Tartaric acids, polarization

Polarization Contrast

Polarization microscopy is routinely applied in material sciences and geology to identify minerals on the basis of characteristic refraction properties and colors. In biology, polarization microscopy…
Transgenic Mouse Embryo, GFP

Fluorescence in Microscopy

Fluorescence microscopy is a special form of light microscopy. It uses the ability of fluorochromes to emit light after being excited with light of a certain wavelength. Proteins of interest can be…
SPERM HY-LITER™ staining of a sexual assault smear slide which was performed by a forensic DNA crime laboratory.

Forensic Detection of Sperm from Sexual Assault Evidence

The impact of modern scientific methods on the analysis of crime scene evidence has dramatically changed many forensic sub-specialties. Arguably one of the most dramatic examples is the impact of…

Anwendungsbereiche

Fluoreszenz

Die Fluoreszenz ist eines der am häufigsten verwendeten physikalischen Phänomene in der biologischen und analytischen Mikroskopie, vor allem wegen ihrer hohen Empfindlichkeit und Spezifität. Erfahren…

Virologie

Liegt Ihr Forschungsschwerpunkt auf Virusinfektionen und -krankheiten? Erfahren Sie, wie Sie mit Lösungen für Bildgebung und Probenvorbereitung von Leica Microsystems mehr Erkenntnisse in der…

Grundlegende Mikroskopietechniken

Bei den grundlegenden Mikroskopietechniken wird das gesamte Präparat auf dem Mikroskoptisch einer Lichtquelle ausgesetzt. Das gesamte Präparat wird mit weißem Licht entweder von oben (in einer…

DIC-Mikroskope

Ein DIC-Mikroskop ist ein Weitfeldmikroskop, bei dem sich zwischen Lichtquelle und Kondensorlinse sowie zwischen Objektiv und Kamerasensor oder Okularen ein Polarisationsfilter und ein…
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