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Researchers develop models to study polyelectrolytes, including DNA and RNA
Date:8/21/2014

Researchers from North Carolina State University have developed a novel and versatile modeling strategy to simulate polyelectrolyte systems. The model has applications for creating new materials as well as for studying polyelectrolytes, including DNA and RNA.

"Our new technique allows us to model much larger and more complex polyelectrolyte systems, and to do so much more quickly," says Nan Li, lead author of a paper on the work and a Ph.D. student in NC State's Department of Materials Science and Engineering. "This is a big step forward for this field."

Polyelectrolytes are chains of molecules that are positively or negatively charged when placed in water. Because they are sensitive to changes in their environment, polyelectrolytes hold promise for use in applications such as drug delivery mechanisms. The term polyelectrolyte system refers to any collection of molecules that interacts in some way and includes polyelectrolytes.

Researchers are interested in computation models that simulate the behavior of polyelectrolyte systems because these models can be used to determine which polyelectrolytes are most likely to have desirable characteristics for use in various applications. The models can also be used to help researchers understand the behavior of polyelectrolyte systems such as DNA, RNA or synthetic ionic polymers.

Polyelectrolyte systems are difficult to model, because the systems can be large and include a lot of ions that can interact with the polyelectrolytes, changing the actual charge, shape, properties and behaviors of the polyelectrolytes. The change in charge affects how the polyelectrolytes interact with each other. The more ions there are in the system, the more likely it is that the polyelectrolytes will be drawn to each other. This interaction of polyelectrolytes changes the behavior and characteristics of the overall system.

"The problem is that tracking all of the ion-polyelectrolyte interac
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Contact: Matt Shipman
matt_shipman@ncsu.edu
919-515-6386
North Carolina State University
Source:Eurekalert  

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