Document Detail


WATER STATE AND CARBONYL DISTRIBUTION POPULATIONS IN CONFINED REGIONS OF LIPID BILAYERS OBSERVED BY FTIR SPECTROSCOPY.
MedLine Citation:
PMID:  23293989     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
It has been suggested that water in confined regions presents different properties than bulk water, mainly due to the changes in water population species that may be induced by the adjacent walls of different polarities, in terms of hydrogen bonding formation. In this context, it would be expected that lipids in the gel and the fluid state should offer different templates for water organization. The presence of water pockets or defects in lipid bilayers has been proposed to explain the insertion of charged and polar peptides and aminoacids in membranes. In this work we provide direct evidence by means of FTIR spectroscopy that water band profiles are changed whether lipids are either in the solid state, in the gel state after heating and cooling across the phase transition or in the fluid state. The different bands found in each case were assigned to different H bonded water populations in correspondence to the exposure of carbonyl groups.
Authors:
E Anibal Disalvo; Maria Angeles Frias
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-8
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  -     ISSN:  1520-5827     ISO Abbreviation:  Langmuir     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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