Bildgebung und Mikroskopie

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Treffer

Ref.-Nr.: 0104-5931-BC

Bildgebung und Mikroskopie
Neue Materialien

"As a result of the evermore-enhanced super resolution microscopic techniques that allow observation of biological processes up to the molecular level in living cells the demand for fluorescent dyes owning the capability of specific binding to molecules like proteins as label for visualization aspects is increased.

A new class of rhodamine derivates that meets all requirements for the use in such biological environment could be developed in the group of Prof. Stefan Hell, Max Planck Institute ...

Ref.-Nr.: 0707-5236-BC

Bildgebung und Mikroskopie
Neue Materialien

Fluorescent dyes are widely used as indispensable markers in biology, optical microscopy, and analytical chemistry. The availability and the proper choice of the dye is a key factor to success of the entire labelling and imaging procedure. Due to superior brightness and photostability, synthetic dyes often represent an attractive alternative to fluorescent proteins.

Among the multitude of fluorophores reported so far, only rhodamines, carbopyronines, and silicon-rhodamines bearing a carboxyl ...

Ref-Nr.: 0104-4458-BC

Bildgebung und Mikroskopie
Neue Materialien

Semiconductor nanowires are of vital importance for many applications, such as flexible electronics, photonics, sensors, and energy harvesting and storage devices. As standard fabrication procedure, vapor-liquid-solid (VLS) growth employs metal catalyst particles (such as gold) as seeds for growth of nanowires. The seeds are deposited on a solid substrate, melted by heating and then exposed to a gas atmosphere containing source materials of the semiconductor. When the metal droplets are supersaturated, ...

Ref.-Nr.: 0707-4198-BC

Bildgebung und Mikroskopie
Sensoren, Geräte und Komponenten

Magnetic resonance imaging (MRI) is nowadays a leading mo¬dality for diagnostic imaging with about 100 million examinations per year worldwide. However, when invented by Paul Christian Lauterbur in 1973, MRI was too slow to allow for routine medical applications. A breakthrough was achieved in 1985 by the FLASH (Fast Low Angle Shot) technique developed by Jens Frahm and his team at the Max-Planck-Institute for Biophysical Chemistry in Göttingen, Germany. With FLASH the measuring time for a cross-sectional ...

Ref.-Nr.: 0107-4677-BC

Bildgebung und Mikroskopie
Sensoren, Geräte und Komponenten

Exploiting the benefits offered by magnetic resonance imaging (MRI) at ultra-high fields (≥ 7 Tesla) requires optimized radiofrequency (RF) coils. MRI at UHF operates in a regime where the RF wavelength is comparable to the dimensions of the sample size, resulting in an inhomogeneous distribution of the transmit field (B1+) and in an impaired image quality. An array of independent transmit coils arranged in multiple rows provides the degrees of freedom to influence the ...

Ref.-Nr.: 0903-5658-LC; 0903-5696-LC; 0903-5692-LC

Analytik
Bildgebung und Mikroskopie
Neue Materialien

A group of scientists at the MPI for Polymer Research in Mainz developed nano-graphene structures that can be used as a new class of fluorophores for super-resolution microscopy (SMLM and STED).

They perform like hybrids of organic dyes and QDs: they have excellent environment-independent blinking properties, emit high photon numbers, display high photo-stability, possess low toxicity, have a molecular size below 2 nm, and have narrow excitation and emission spectra.

These nanographene ...

Ref.-Nr.: 1401-4572-WT

Bildgebung und Mikroskopie
Sensoren, Geräte und Komponenten : Geräte

The state of an electron is completely defined by its momentum and spin. In processes like electron diffraction or photoemission electron ensembles are generated which have a characteristic 3D distribution of momentum and spin. To examine such events the three components of the momentum vector have to be measured. Up to now, the momentum distribution of an ensemble of charged particles was typically measured using energy-dispersive spectrometers based on sequential approaches (sequentially changing ...

Ref.-Nr.: 0707-5297-BC

Bildgebung und Mikroskopie
Neue Materialien

Fluorescent dyes are widely used as indispensable markers in biology, optical microscopy, and analytical chemistry. In particular, the sensitive and stable imaging of cellular components depends on the favourable combination of chemical, biological and physical factors. The availability and proper choice of fluorescent dyes is a key factor to success in the entire labelling and imaging procedure. Due to their superior brightness and photostability, synthetic dyes represent an attractive alternative ...