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Metal colloids - their preparation, application and characterization Webinar - Live (English)

Metal colloids represent a very interesting system known since Roman times (the Lycurgus Cup). We'll look at the preparation of these systems looking mainly at gold, silver, and the platinum group metals. All these find extensive application in in...

NanoSight range,Zetasizer range
February 18 2016

Rheological characterization of asphalt binders at low temperatures by using the 4-mm DSR technique. Part 2 Webinar - Live (English)

Recently, it has become increasingly popular to measure the low-temperature rheological properties of asphalt binders by using 4-mm parallel plate geometry on a rotational rheometer. In this webinar, rheological data measured with this so-called “4-m...

Kinexus DSR range
February 17 2016

Particle Characterization for Oral Solid Dose Formulations Webinar - Recorded (English)

The particle size and size distribution of the Active Pharmaceutical Ingredients (APIs) and excipients present in Oral Solid Dose (OSD) products are often critical to defining product performance. This is recognized by ICH Q6A, which recommends that ...

Mastersizer range,Morphologi range
Date recorded:
February 9 2016

Using rheology to study the hardness and spreadability of butter Application Note (English)

Butter is a multiphase emulsion consisting of fat globules, crystalline fat and an aqueous phase dispersed in a continuous oil phase. This complex microstructure governs the physical properties of butter including its texture, appearance and how easi...

Size: What is the z-average? FAQ

The z-average diameter is the mean intensity diameter i.e. it is a diameter based upon the intensity of scattered light of a material in its native state (including electrical double layers and surface structure). The z-average is derived from a Cumulants analysis of the measured correlation curve, wherein a single particle size is assumed and a single exponential fit is applied to the autocorrelation function. It is unique to dynamic light scattering and it is sensitive to the presence of aggregates/dust due to the intensity of light scattered by any larger particles present.

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