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RheoSense Blog: In Viscosity News...

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RheoSense Blog

Back To Basics

Posted by Gordon Stack

May 22, 2018 1:00:00 PM

We are all familiar with maintaining our lab instruments, but how often do we perform maintenance on our lab methods or SOPs?

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Topics: Fun with Viscosity, RheoSense, Inc., General Information, Rheometer, Viscometer, microVISC, Applications, Viscosity Measurements, viscosity, Standards, FYI

Latest Release & Upcoming Events

Posted by Joseph Chun

May 15, 2018 1:00:00 PM

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!

DOWNLOAD APPLICATION NOTE

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Topics: 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

Posted by Joseph Chun

Mar 13, 2018 8:20:07 PM

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). 

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

Cambridge Workshop: VROC® initium ― Automatic, High Throughput Viscometer

Posted by Grace

Apr 20, 2016 3:21:04 PM

RheoSense is proud to present the upcoming workshop where VROC® initium the first truly automated, high throughput viscometer will be unveiled. 


The workshop will take place at the Hyatt Regency in Cambridge, Massachusetts. We will include a demonstration of the instrument, along with a presentation and Q&A session on how automated shear rate/temperature sweeps can help characterize your samples.

RSVP for Event

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Topics: Rheometer, Viscometer, RheoSense News, Conference/Event, VROC initium

Viscosity vs. Concentration: L-Arginine Dilute Solutions in Water & PBS

Posted by David Nieto

Mar 15, 2016 4:09:04 PM

 The exact mechanism by which Arginine molecules affect protein molecules in solution is unclear. Nonetheless, its benefits increasing solubility and controlling viscosity have spread out its application in biopharma formulations, specially for high concentration antibody solutions. 

In our application note, we examine the effect of concentration on the viscosity of dilute solutions of L-Arginine in water and PBS. Additionally, we study the Intrinsic Viscosity of this solutions to better understand molecular size and solubility in dilution. 

Download L-Arginine  Application Note

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Topics: Viscosity Measurements, Applications, Biotechnology, Rheometer, m-VROC, Proteins, Viscometer, RheoSense, Inc., Automatic Viscometer, VROC initium, High throughput Viscometer

Workshop: VROC® initium ― Automatic, High Throughput Viscometer Unveil

Posted by Grace

Mar 9, 2016 1:13:09 PM

RheoSense is proud to present the upcoming workshop where VROC® initium the first truly automated, high throughput viscometer will be unveiled. 

VROC initium Workshop - New Jersey April 5, 2016 at 9:00 am

The workshop will take place at the Kenilworth Inn in New Jersey. We will include a demonstration of the instrument, along with a presentation and Q&A session on how automated shear rate/temperature sweeps can help characterize your samples.

RSVP for Event

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Topics: Rheometer, Viscometer, RheoSense News, Conference/Event, VROC initium

Application Corner - Conductive Inks

Posted by David Nieto

Jan 19, 2016 11:44:27 AM


 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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
 
 
 
 
Industries:
Inkjet Inks
Ceramic Inks
Water Based Inks
Biopolymer and Protein Inkjet
 
 
 
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Topics: microVISC, Viscosity Measurements, VROC Technology, Rheometer, m-VROC, viscosity

Negative Viscosity? You've Got to Be Kidding!

Posted by David Nieto

Aug 4, 2015 1:10:00 PM

We are not! In fact, researchers from Paris-Sud University have shown how bacteria, in particular E. coli, can contribute to flow by changing the hydrodynamic properties of the fluid they swim on Phys. Rev. Lett. 115, 028301 (2015). 

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Topics: Rheometer, viscosity

Welcome!

Posted by RheoSense

Jul 9, 2013 1:08:55 PM

Welcome to RheoSense, Inc.'s official blog!  As a global leader in the viscometry industry, we wish to use this blog as an interactive communication platform.

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Topics: microVISC, VROC Technology, Rheometer, m-VROC, General Information, Viscometer, RheoSense, Inc.

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