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The viscosity of blood influences at least three variables: its ability to clot, perfuse tissue, and vascular resistance. An abnormally high blood viscosity can be an indicator of underlying health issues and a predictor of adverse events such as the following:
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The vast majority of fluids in the world exhibit non-Newtonian behavior. So, knowing how to measure, correct, and handle non-Newtonian rheological data is vital for performing accurate and repeatable experiments and data analysis.
This application note will step through the commonly used Weissenberg-Rabinowitsch-Mooney (WRM) shear rate correction for non-Newtonian fluids, that way future experiments and data analysis can be done with peace of mind!
We have released a new application note on low viscosity fluids specifically by using an assortment of colognes.
Viscosity data for different colognes were obtained using microVISC™. Over the shear rates explored, 200 to 5,100 1/s, the colognes exhibited Newtonian behavior.
The viscosity of these colognes was found to be between 1.72 and 2.12 mPa-s. The primary ingredient was alcohol, but there were still up to a 20 % difference in the viscosity between the highest and lowest viscosity samples.
This result shows that formulations with similar base ingredients can still have a wide range of viscosities based on the other components of the formulation.
I recently got a great question from our customers on how to measure zero shear viscosity with RheoSense viscometers. It is a fairly common misconception so I wanted to cover what zero shear viscosity.
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Key Words: Shear Rate Sweep, Shear Thinning, Viscosity, non-Newtonian Fluid, Automation, Newtonian, Characterization, Polymer, Oils
Goal: Serums are a popular self-care product to keep skin healthy. Formulation ingredients can vary dramatically. Some serums use plant-derived ingredients while others use synthetic oils depending on consumer preferences and needs. Thus, serum development is a dynamic process requiring a plethora of characterization experiments to differentiate between formulations. Here we demonstrate that the automated viscometer system, VROC® initium, can perform rate sweeps experiments to characterize different serum formulations based on their rheological properties with minimal engagement.
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