Visualising Analytes in Gas Chromatography by Staining and Substance Maps.

Chromatographic separations in combination with spectroscopic detectors are a main pillar of today's analytical chemistry. The recorded spectroscopic data is usually not shown in a typical chromatogram, therefore the contained additional information cannot be accessed readily by the analyst and is inspected in tedious additional routines, such as separate database searches. We developed a method to add colors to gas chromatograms with mass spectral detection.

[Atlanto-occipital dislocation-A challenge with respect to making the diagnosis and treatment].

Background: The correct diagnosis and treatment of the atlanto-occipital dislocation (AOD) remains a major challenge.

Objective: To evaluate the different radiological diagnostic criteria for AOD and discuss potential treatment strategies based on a case with AOD and additional fracture of the atlas.

Material And Methods: A 29-year-old male patient is presented who suffered from AOD with concomitant fracture of the anterior and posterior arches of the atlas with rotational atlantoaxial dislocation following an accident in forestry.

Self-organising maps for the exploration and classification of thin-layer chromatograms.

Thin-layer chromatography (TLC) allows the swift analysis of larger sample sets in almost any laboratory. The obtained chromatograms are patterns of coloured zones that are conveniently evaluated and classified by visual inspection. This manual approach reaches its limit when several dozens or a few hundred samples need to be evaluated.

Unbreakable and customizable dipping chambers for TLC and HPTLC manufactured by fused deposition modelling.

Postchromatographic derivatization chambers for Thin Layer Chromatography (TLC) and its high-performance counterpart (HPTLC) are made of glass, which renders them fragile and - given their frequent use - eventually rather expensive. As a consequence, in daily lab routine, staining reagents are often kept in jars or beakers as cheap and available but unsatisfying equipment. This work describes the design and the manufacturing of shock-resistant and affordable dipping chambers from polypropylene (PP) by fused deposition modelling ("3D printing").