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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

In the Blink of an Eye - Viscosity of Eye Drops

Wow, it's already more than halfway through January within the new year. Time really does fly, huh? We hope that 2018 has been good and already have been a learning experience so far.

Formulate your eye drops properly

In Application Focus, m-VROC, General Information, Proteins, Viscometer, Small Sample Viscometer

Not too little, not too much, just the right amount of force

Do you subconsciously dread the first drop of ketchup out of its bottle? Have you noticed the inconsistent flow in the substance as you try to coax the ketchup out, only to have a huge gush of flow when you realize you have coaxed it a little too well? 

In Proteins, m-VROC, Viscometer, Applications, VROC initium, Biotechnology, Inks Viscosity, Blood Viscosity, Viscosity Measurements

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

 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

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

2016 Pittcon Conference

RheoSense is will be exhibiting at the 2016 Pittcon Conference from March 6th to March 10, 2016. Visit us at Booth #1522 to meet our specialists and see the new automatic, high throughput viscometer, VROC® initium! 

In microVISC, m-VROC, General Information, Viscometer, Small Sample Viscometer, RheoSense, Inc., Conference/Event, Automatic Viscometer, Plasma Viscosity, Blood Viscosity, VROC initium, High throughput Viscometer, Serum Viscosity

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

2016 Society for Laboratory Automation and Screenings (SLAS) Conference

RheoSense is will be exhibiting at the 2016 Society for Laboratory Automation and Screening (SLAS) Conference from January 23rd to the January 27th. Visit us at Booth #601 to meet our specialists and see the new automatic, high throughput viscometer, VROC® initium! 

In microVISC, m-VROC, General Information, Viscometer, Small Sample Viscometer, RheoSense, Inc., Conference/Event, Automatic Viscometer, VROC initium, High throughput Viscometer

Perfect Liquid! Low Viscosity!

In a recent post, we discussed how some liquids containing bacteria swimmers can display negative viscosity. This can be a misleading since the apparent negative viscosity occurs due to swimmers pushing the surrounding fluid so that the overall system shows negative resistance to flow (i.e. it flows by itself!). One of the best examples of super fluidity is super cooled helium.

In m-VROC, Viscometer, viscosity

Intrinsic Viscosity: Important for Protein Formulations

Intrinsic viscosity is an important tool in the fields of polymer and protein research. Intrinsic viscosity allows for determination of molecular weight and size more reliably than dynamic light scattering. Small sample m-VROC™ viscometer is an ideal tool to measure intrinsic viscosity of samples. The high accuracy, low sample volume requirements, and high speed of measurement ensure that data collection is fast, simple, and accurate. 

In Applications, Pharmaceuticals, m-VROC