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Latest Release & Upcoming Events

In the upcoming weeks, we are proud to announce the release of our latest application note regarding concentration dependence in protein viscosity. In this app note, Dr. Stacey Elliott gathered viscosity data for Bovine Gamma Globulin (BgG) formulations over the full concentration range, including therapeutic levels ≥ 100 mg/mL, using the VROC®Initium. The solution buffer included sucrose which is a common additive to enhance stabilization during freeze-drying and storage. Relative viscosity versus concentration curves were fit with the Ross-Minton equation which is a frequently used analysis tool for protein formulations.

To view application note, click below!


In Viscosity Measurements, Protein Solutions, bovine gamma globulin, shear rate sweep, Announcement, viscosity, Fun with Viscosity, VROC Technology, RheoSense News, Small Sample Viscometer, Viscometer, General Information, Rheometer, Proteins

Different Ways to Measure Viscosity

Measuring viscosity dates back to as early as the 19th century. French physicist Jean Poiseuille discovered the concept of measuring viscosity by formulating the "mathematical expression for the flow rate for the laminar flow of fluids in circular tubes." Later on, this formulation was discovered by a German hydraulic engineer Gotthilf Hagen, which came to be known as the Hagen-Poiseuille equation (Britannica). Early measurements of viscosity focused primarily on the flow of blood. Measurements were conducted using the hemodynamometer that incorporated narrow tubes & glass capillaries in effort to measure the pressures in the arteries of horses and dogs (Sutera). 

In viscosity, Viscosity Measurements, Rheometer, General Information, Viscometer, Small Sample Viscometer, VROC Technology, High throughput Viscometer, Automatic Viscometer, Biotechnology, m-VROC, FYI

VROC initium Application Note - Automated Screening of BSA Solutions

VROC® initium
Automated Screening of BSA Solutions

Bovine Serum Albumin (BSA) is a globular protein extracted from cow’s blood. Due to its low-cost, stability and availability, BSA is widely used as a protein concentration standard.
New Call-to-actionRead more about what major applications of BSA include:

In Pharmaceuticals, VROC Technology, Proteins, Viscometer, RheoSense, Inc., Automatic Viscometer

Application Corner - Conductive Inks

Viscosity of conductive inks with m-VROC® and microVISC™:

Viscosity of conductive inks, paints and coatings is key to establish manufacturing processes for printed electronics and display systems. The complexity of printing and coating technologies has motivated a rapid growth of the conductive inks industry. To meet the market demands, efficient, highly accurate and fast characterization methods are required.
Conventional viscometers are often unable to fully characterize complex fluids (i.e. they are not able to measure viscosity as a function of shear rate or extensional properties). On the other hand, rheometers are limited to relatively low (<10,000 1/s) deformation rates. Our microfluidic-based VROC® (Viscometer/Rheometer On a Chip) technology overcomes these limitations.
RheoSense viscometers are able to fully characterize the flow curves (viscosity vs shear rate) of complex fluids for shear rates ranging from 0.5 to 1,400,000 1/s. Additionally, we offer measurements of extensional viscosity and temperature control from 4°C to 105°C. Accurate measurements of shear and extensional viscosity at the deformation rates and temperatures relevant for the fabrication processes are essential to understand the subtleties of the different printing and coating technologies.

VROC® powered instruments, provide a solution to the challenges of conventional technologies. The high accuracy and repeatability over a wide range of deformation rates make our systems Simply Precise™ at a fraction of the sample volume and testing time!
Target Keywords
Inks Viscosity
Non-Newtonian Inks
Shear Thinning Inks
Accurate Low Viscosity Measurements
Inkjet Inks
Ceramic Inks
Water Based Inks
Biopolymer and Protein Inkjet
In microVISC, Viscosity Measurements, VROC Technology, Rheometer, m-VROC, viscosity

VISCO❄HOLIDAY: Viscometer Gift

As a sign of customer appreciation and for the end of 2015, RheoSense presents a viscometer give-away and other prizes for all those completing our end-of-year survey. The following prizes will be awarded:
  • One Grand Prize: A microVISC viscometer* + 50$ Amazon Gift Card

  • Five Second Prizes: 50$ Amazon Gift Cards

  • All participants providing a referral to a friend or college will receive a 10% discount* in all RheoSense products and services​
In Promotion, microVISC, VROC Technology, Small Sample Viscometer, Announcement

Viscosity on Demand

Offshore oil producers have long wished to have a magical remote control for the viscosity of crude oil. An ideal device like this will allow them to reduce the viscosity of crude oil for a few hours, while it is pumped through pipelines to onshore tanks, where it would be restored to its original thick and viscous conditions. Scientist R. Tao and X. Xu have finally cracked it! 

In VROC Technology, General Information, Viscometer