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New equation predicts molecular forces in hydrophobic interactions
Date:10/11/2011

0 years ago," explains Professor Israelachvili.

"According to the van der Waals theory, however, oil and water shouldn't separate and surfactants shouldn't form membranes, but they do. There has been no proven theory to account for these special hydrophobic interactions. Such behaviors are crucial for life as we know it to exist."

Hydrophobic and hydrophilic interactions are central to the disciplines of chemistry, physics, and biology that have fueled modern developments in industries from detergents to pharmaceuticals and new biotechnologies. The new equation is expected to impact applications in water filtration, membrane separations, biomedical research, gene therapy methods, biofuel production, and food chemistry.

Virus and disease propagation in the human body are directly linked to hydrophobic properties on a cellular level. One of the problems related to chemotherapy treatments for cancer is being able to direct a drug specifically to cancer cells, instead of the entire body. Israelachvili and his colleagues foresee their discovery having an impact in biomedical research that attempts to understand and treat diseases.

"Cell membranes are complex and discriminating structures, allowing the transmission of various signals into cells and mediating specific interactions with bacteria and viruses," said Jean Chin, Ph.D., who oversees membrane structure grants at the National Institute of General Medical Sciences of the National Institutes of Health. "This study, by enhancing our understanding of the role played by hydrophobic forces in membrane dynamics, will expand what we know about membrane structure and function, as well as microbial infection pathways."

"Understanding how water and oil-like substances interact is enormously important for explaining the properties and functions of many biological and engineering materials," says Dr. Robert Wellek, Program Director in the Directorate for Engineering at
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Contact: Melissa Van De Werfhorst
melissa@engineering.ucsb.edu
805-893-4301
University of California - Santa Barbara
Source:Eurekalert  

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