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Technical papers, application notes and case studies from laboratory, chemistry, life science and quality control

Leica Microsystems GmbH
Fluorescence Lifetime Imaging Microscopy: There is More to See
Dr. Rolf T. Borlinghaus, Leica Microsystems GmbH
Conventional fluorescence images show the spatial distribution of emission intensity. These kinds of images contain further information that is concealed in intensity images. This article outlines color-coding of intensity versus lifetime images and how the combination of the two contrast methods can reveal new insights, even within narrow spectral bands....

Krüss GmbH
Interfacial rheology of emulsifiers in food
Dr. Daniel Frese, Maria Mihhailova, Krüss GmbH
Proteins and lipids are the key surface-active substances for emulsions and foams in the food industry. The structure which they form on an oil/water interface influences the stability of foams and emulsions and can even alter the sensory perception of food colloids such as these. Interfacial rheolo...

Conference Report: International Workshop Dispersions Analysis and Materials Testing 2018
Dr. Hildegard Lyko, LUM GmbH
This year, the Workshop clearly focussed on particle characterization and stability analysis. With 16 lectures announced, of which two had to be cancelled, participants had good opportunities to discuss the interesting results from testing materials by means of analytical centrifugation and gravity ...

Integrated BioBank of Luxembourg (IBBL)
Assays for Qualification and Quality Stratification of Clinical Biospecimens Used in Research
Dr. Fay Betsou, Integrated BioBank of Luxembourg (IBBL)
Alexandre Bulla, University Hospital of Geneva

This technical report presents quality control (QC) assays that can be performed in order to qualify clinical biospecimens that have been biobanked for use in research.Some QC assays are specific to a disease area.Some QC assays are specific to a particular downstream analytical platform. When such ...

Imprint Analytics GmbH
GCMS and IRMS acquire the isotopic fingerprint of vanillin
Dr. Balasz Horvarth, Dr. David Psomiadis, Dr. Bernd Bodiselitsch, Imprint Analytics GmbH
Vanillin is the most popular flavor worldwide. It is traditionally produced from vanilla pods (Vanilla planifolia or other species) by maceration. However, natural vanilla production covers only 1% of global demand. 99 % of vanillin flavor is produced synthetically (petro-chemical origin) or biotech...

Krüss GmbH
Dosing falling drops with a defined volume for contact and roll-off angles
Stefan Benn, Ming Jin, Frank Thomsen, Krüss GmbH
When it comes to measurements involving falling drops, the drop size and fall height have to be kept constant if comparable results are to be achieved. If the same needle diameter is used, falling drops of the same liquid are indeed always the same size. However, it is almost impossible to specify t...

Deutsche Metrohm GmbH & Co. KG
Ion Chromatography - tips and tricks
Deutsche Metrohm GmbH & Co. KG
One of the basic requirements for ensuring reliable chromatographic analyses is a high-performance separation column. Users of IC should regularly check the performance of their column. If a drop in performance becomes apparent, steps can be taken in good time to restore or maintain the proper funct...

ACHEMA 2018: Containment in Process Engineering
A paradigm change in solids production is underway in the chemical and pharmaceutical industries. The trend to increased specialization and higher-potency active ingredients creates the need for hermetically sealed process flows. Government regulations are also becoming stricter. To an increasing ex...

School of Materials Science and Engineering, Harbin Institute of Technology, PR China
Determining the wettability of carbon fiber tows from single fiber contact angle data
Jian Wang, Si Qiu, School of Materials Science and Engineering, Harbin Institute of Technology, PR China
Carlos A. Fuentes, Department of Materials Engineering, KU Leuven, Belgium

Physical adhesion between carbon fibers (CFs) and polymer matrices as well as the formation of voids at the interface between these two materials are mostly determined by the wetting properties of the fibers. Due to the hierarchical structure of CF reinforcements, it is essential to study their wett...

Shimadzu Deutschland GmbH
Analytical methods for plastic packaging of foods
Uwe Oppermann, Marion Engelkraut-Holthus, Jan Knoop, Shimadzu Deutschland GmbH
The influence of cups, plastic bottles and film packaging on human health and the environment is a challenge. Supermarket shelves are full of products that are, in part, packaged in highly complex plastics. These types of packaging materials are lightweight and also highly stable, and protect exp...