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Polyolefins: Determination of Molecular Weight and Branching Structure by GPC/SEC

16-Jun-2008

Polyethylene and Polypropylene are so-called Polyolefins. They are produced in large amounts every year. Depending on the process and catalyst used linear or branched polymers can be produced. In case of e. g. Polyethylene there are at least three po

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Measuring particle size using modern laser diffraction techniques

12-Feb-2007

Many different techniques have been devised for determining particle size distribution, but for a wide range of industries laser diffraction has

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Dynamic Light Scattering - an Important Tool for Protein Crystallography and Nanotechnology

07-Feb-2007

Dynamic Light Scattering (DLS) is an established technique in the field of protein crystallography. DLS is used to measure hydrodynamic sizes, polydispersities and aggregation effects of protein samples. These are important parameters for the crystal

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On-line particle analysis in wet processes

02-Feb-2007

Fully automated particle size measurement technology integrated with existing plant control platforms for ease of use has the potential to deliver

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Particle shape - an important parameter in pharmaceutical manufacturing

23-Jan-2007

The advent of rapid and reliable measurement technologies, together with the FDA's PAT (Process Analytical Technologies) initiative, has increased the

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Making the connection - particle size, size distribution and rheology

23-Jan-2007

A number of factors influence the rheology of a suspension, including particle size, particle size distribution, and the volume fraction of solids present. Here we examine the relationship between rheology and particle size parameters. Commonly used

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Measurement of Nano particles and Proteins

08-Nov-2006

Colloid emulsions in their native environment require particle size determination in high concentration since there are concerns about changes in sample morphology upon dilution eg break up of aggregates. For proteins and other samples with very low concentration and for weakly scattering samples ...

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"Triple Detection" in Gel Permeation Chromatography

11-Nov-2005

Gel permeation chromatography (GPC) or also named size exclusion chromatography (SEC) is the most often used method for determining the molecular weight of natural and synthetic macromolecules. One specific strength of this method lies in the fact th

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