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Literature DB >> 911980

Hydration of phosphatidylocholine. Adsorption isotherm and proton nuclear magnetic resonance studies.

D A Wilkinson, H J Morowitz, J H Prestegard.

Abstract

Adsorption-desorption isotherms were obtained for water binding by 1,2-dimyristoylphosphatidylcholine in the temperature range 15 degrees-35 degrees C. The isotherms were analyzed by Brunauer et al.'s (BET) theory and also a polarization theory, the latter being more successful in fitting the data. There was some evidence for a change in the surface field of the lipid bilayer around 25 degrees C. Proton T1 and T2 measurements were used to obtain a log-normal molecular correlation time distribution for water protons in these systems. This distribution was compared with the isotherm data to effect a description of several classes of water molecules.

Entities: Chemical

Mesh：

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Year: 1977 PMID： 911980 PMCID： PMC1473388 DOI： 10.1016/S0006-3495(77)85542-2

Source DB: PubMed Journal: Biophys J ISSN： 0006-3495 Impact factor: 4.033

14 in total

9. Factors affecting the motion of the polar headgroup in phospholipid bilayers. A 31P NMR study of unsonicated phosphatidylcholine liposomes.

Authors: P R Cullis; B De Kruyff; R E Richards
Journal: Biochim Biophys Acta Date: 1976-03-19

8. Changes in the lipid dynamics of liposomal membranes induced by poly(ethylene glycol): free volume alterations revealed by inter- and intramolecular excimer-forming phospholipid analogs.

Authors: J Y Lehtonen; P K Kinnunen
Journal: Biophys J Date: 1994-06 Impact factor: 4.033

8 in total

Hydration of phosphatidylocholine. Adsorption isotherm and proton nuclear magnetic resonance studies.

1. A theory of cell hydration governed by adsorption of water on cell proteins rather than by osmotic pressure.

2. Shape of the hydrophobic barrier of phospholipid bilayers (evidence for water penetration in biological membranes).

3. The state of water in muscle as studied by pulsed NMR.

4. A pulsed N.M.R study of D2O bound to 1,2 dipalmitoyl phosphatidylcholine.

5. The hydration of phospholipids.

6. Physical studies on egg phosphatidylcholine in diethyl ether- water solutions.

7. Phospholipid hydration studied by deuteron magnetic resonace spectroscopy.

8. Deuteron magnetic resonance studies of water associated with phospholipids.

9. Factors affecting the motion of the polar headgroup in phospholipid bilayers. A 31P NMR study of unsonicated phosphatidylcholine liposomes.

10. Water-lecithin binding in lecithin-water lamellar phases at 20 degrees C.

1. Formation of multilayered vesicles from water/organic-solvent (w/o) emulsions: theory and practice.

2. Water adsorption isotherms of lipids.

3. Relations for lipid bilayers. Connection of electron density profiles to other structural quantities.

4. Poly(ethylene glycol)-induced and temperature-dependent phase separation in fluid binary phospholipid membranes.

5. Evidence for a role of phosphatidyl ethanolamine as a modulator of membrane-membrane contact.

6. Water adsorption isotherms and hydration forces for lysolipids and diacyl phospholipids.

7. Temperature dependence of the repulsive pressure between phosphatidylcholine bilayers.

8. Changes in the lipid dynamics of liposomal membranes induced by poly(ethylene glycol): free volume alterations revealed by inter- and intramolecular excimer-forming phospholipid analogs.