Document Type

Article

Rights

This item is available under a Creative Commons License for non-commercial use only

Disciplines

Atomic, Molecular and Chemical Physics, Physical chemistry, Biophysics

Publication Details

“Vibrational Spectroscopic Studies to Elucidate the Structure of Water at Biological Interfaces“, Bahar Bahrani, Luke O’Neill and Hugh J. Byrne, International Journal of Latest Research in Science and Technology, 4, 28-31 (2015)

Abstract

In biological systems, water takes up to 80% of the volume inside a cell. This water solubilizes the biological macromolecules such as the DNA, proteins and lipids. Recent advancements have shown that the water at the interface of a lipid membrane is structured, as five layers of structured water have been found at this solvent cage. Steady state Raman spectroscopy of water in lipids was performed in an attempt to elucidate the structure of water at the biological interface. Deuterium oxide (heavy water) was employed to hydrate lipid biomolecules. The heavier deuterium atom shifts the molecular vibrations and renders them distinct from conventional OH vibrations. Raman spectroscopy was used to probe the difficulties of observing the vibrational signature of the water molecule at low hydration limits. It was demonstrated that Raman can identify signatures of potential structured forms of water at the interface with lipid membranes.

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