HOME >> BIOLOGY >> NEWS
When opposites don't attract: Understanding why may support new biomaterials, Science paper suggests

Every high school student is taught that opposite charges attract. Even in the complex world inside living cells, simple rules of thumb like this one usually continue to told, and go a long way to explaining how the machinery of life all holds together.

Recently, however, researchers have found an intriguing exception to this rule, which may have implications for the development of new materials for sophisticated sensors and optical devices, says Nily R. Dan, an assistant professor in UD's Department of Chemical Engineering, in a July 16 Science article.

"Our work addresses fundamental questions about how charges interact," Dan says of her joint work with researchers at the University of Pennsylvania. "In complex systems, such as multi-component materials or living cells, opposite charges don't necessarily attract. Understanding the conditions in which oppositely charged objects do or don't attract helps us understand basic strategies of self-assembly, which may be used to design new drug carriers or smart materials that respond to their environment."

Dan's article--coauthored by UD postdoctoral researcher Helim Aranda-Espinoza and by Yi Chen, Tom C. Lubensky, Philip Nelson, Laurence Ramos, and David A. Weitz of the University of Pennsylvania--examines the interactions between microscopic charged particles and oppositely charged synthetic membranes.

One would expect that the particles would adhere and cover the entire membrane surface. However, the experiments show that, frequently, only a small fraction of the membrane area is covered by adhering particles. Why do the remaining bare, oppositely charged surfaces repel particle adhesion? The researchers showed that in some cases the system prefers instead to separate into a highly adhesive zone and another, repulsive, zone by transmitting electrochemical jumps over long distances along the impenetrable membrane. While the system imitates living cells (the membrane) interacting with oppositely
'"/>

Contact: Ginger Pinholster
gingpin@udel.edu
302-831-6408
University of Delaware
16-Jul-1999


Page: 1 2

Related biology news :

1. Briefing to address what women dont know about lung cancer
2. With flu season coming, dont forgetexercise?
3. Clinical trial patients dont care about study sponsors or physician conflicts of interest
4. Researchers try to determine why cancer cells dont commit suicide
5. Birds do it. Bugs do it. But why dont we?
6. Memory for music: Musicians dont have to hear themselves perform after they learn a song
7. Ears cant hear when special sensory cells dont stay quiet
8. Bacteria cant do their thing if they dont have cling
9. Cell phones dont cause cancer, rat study finds
10. Lean mice adjust to appetite suppressant quickly, fat mice dont
11. Carbon monoxide has unexpected benefits, but dont try it at home

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/16/2017)... , May 16, 2017   Bridge ... health organizations, and MD EMR Systems , ... development partner for GE, have established a partnership ... Portal product and the GE Centricity™ products, including ... EMR. These new integrations will ...
(Date:4/18/2017)... 18, 2017  Socionext Inc., a global expert in SoC-based imaging ... server, the M820, which features the company,s hybrid codec technology. A ... Tera Probe, Inc., will be showcased during the upcoming Medtec Japan ... at the Las Vegas Convention Center April ... Click here for ...
(Date:4/11/2017)... BEACH GARDENS, Fla. , April 11, 2017 ... identity management and secure authentication solutions, today announced ... contract by Intelligence Advanced Research Projects Activity (IARPA) ... for IARPA,s Thor program. "Innovation has ... onset and IARPA,s Thor program will allow us ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... (PRWEB) , ... October 11, 2017 , ... ... any gene in its endogenous context, enabling overexpression experiments and avoiding the use ... with small RNA guides is transformative for performing systematic gain-of-function studies. , ...
(Date:10/11/2017)... , Oct. 11, 2017  VMS BioMarketing, a leading provider ... nationwide oncology Clinical Nurse Educator (CNE) network, which will launch ... for communication among health care professionals to enhance the patient ... office staff, and other health care professionals to help women ... cancer. ...
(Date:10/11/2017)... Bay, Florida (PRWEB) , ... October 11, 2017 ... ... and Drug Administration (FDA) has granted orphan drug designation to SBT-100, its novel ... (sdAb) for the treatment of osteosarcoma. SBT-100 is able to cross the cell ...
(Date:10/10/2017)... ... ... Dr. Bob Harman, founder and CEO of VetStem Biopharma, Inc. ... event entitled “Stem Cells and Their Regenerative Powers,” was held on August 31st, ... was joined by two human doctors: Peter B. Hanson, M.D., Chief of Orthopedic Surgery, ...
Breaking Biology Technology:
Cached News: