1
40
2
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
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n/a
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
11-20
Issue
1
Volume
70
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Anomalous Phase Transition In Dipalmitoylphosphatidylethanolamine/palmitoylphosphatidylcholine/water System
Publisher
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Biophysical Chemistry
Date
A point or period of time associated with an event in the lifecycle of the resource
1998
1998-01
Subject
The topic of the resource
bilayer; Biochemistry & Molecular Biology; Biophysics; Chemistry; compressibility; DSC; lysolecithin; lysophosphatidylcholine; membrane; NMR; permeability; phase transition; phosphatidylcholine vesicles; phosphatidylethanolamine; phospholipid; phospholipid-vesicles; translocation; volumetric
Creator
An entity primarily responsible for making the resource
La Rosa C; Grasso D; Checchetti A; Golemme A; Chidichimo G; Westerman P
Description
An account of the resource
An anomalous phase transition with a marked rise in specific heat, the isobaric thermal expansion coefficient, and the compressibility coefficient at 62.5 degrees C for an equimolar mixture of 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE) and 1-palmitoyl-sn-glycero-3-phosphocholine (PLPC), in water (34 wt.%) has been shown by differential scanning calorimetry, scanning dilatometry and isothermal compressibility measurements. This transition occurs 15 degrees C above a first-order transition observed in the same system, P-31 and H-2 nuclear magnetic resonance results are consistent with the occurrence of 'defects' in the bilayer in the temperature range between the first and the anomalous phase transitions, It is proposed that conically, PLPC molecules prefer regions with high curvature in the defective bilayer, while DPPE molecules are mostly confined to the flat regions of the bilayers. (C) 1998 Elsevier Science B.V.
Identifier
An unambiguous reference to the resource within a given context
n/a
Format
The file format, physical medium, or dimensions of the resource
Journal Article or Conference Abstract Publication
1998
bilayer
Biochemistry & Molecular Biology
Biophysical Chemistry
Biophysics
Checchetti A
Chemistry
Chidichimo G
compressibility
DSC
Golemme A
Grasso D
Journal Article or Conference Abstract Publication
La Rosa C
lysolecithin
lysophosphatidylcholine
membrane
nmr
Permeability
phase transition
phosphatidylcholine vesicles
phosphatidylethanolamine
phospholipid
phospholipid-vesicles
Translocation
volumetric
Westerman P
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1016/0009-3084(96)02574-1" target="_blank" rel="noreferrer noopener">http://doi.org/10.1016/0009-3084(96)02574-1</a>
Rights
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
147-162
Issue
2
Volume
82
Search for Full-text
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Effect of 1-palmitoyl lysophosphatidylcholine on phase properties of 1,2-dipalmitoyl phosphatidylethanolamine: A thermodynamic and NMR study
Publisher
An entity responsible for making the resource available
Chemistry and Physics of Lipids
Date
A point or period of time associated with an event in the lifecycle of the resource
1996
1996-08
Subject
The topic of the resource
Biophysics; Biochemistry & Molecular Biology; cholesterol; fusion; lysolecithin; lipid; membranes; bilayer; H-2-NMR; transition; nuclear-magnetic-resonance; phosphatidylcholine vesicles; lecithin; bilayers; DSC; mixtures; P-31-NMR; phosphatidylethanolamine
Creator
An entity primarily responsible for making the resource
Checchetti A; Golemme A; Chidichimo G; LaRosa C; Grasso D; Westerman P W
Description
An account of the resource
The effect of 1-palmitoyl lysophosphatidylcholine (PLPC) on the phase behaviour of 1,2-dipalmitoyl phosphatidylethanolamine (DPPE) in excess water (34 wt%) has been examined by differential scanning calorimetry, scanning dilatometry and isothermal compressibility measurements. Mole percentages of PLPC in DPPE between 14 and 62% have been studied over the temperature range 30-75 degrees C. The temperature dependence of orientational ordering at selected sites in H-2-labelled PLPC and 2H(2)O has been determined from measurement of time-averaged chemical shift anisotropies and quadrupole splittings in the P-31- and H-2-NMR spectra. These data have been used to further characterize phase behaviour. At less than equimolar contents of PLPC, when a single phase transition with a reduced transition temperature is observed, spectral and calorimetric data indicate complete miscibility of the two lipid components. An equimolar mixture of PLPC and DPPE shows a sharp first order transition at 47.3 degrees C and a second order transition at 62.5 degrees C. NMR data are consistent with the existence of a defective bilayer at intermediary temperatures. In this range it is proposed that PLPC molecules prefer regions with high curvature in the vicinity of the defects, while DPPE molecules are mostly confined to flatter regions of the bilayer. A possible molecular model is described, At temperatures above 62.5 degrees C, PLPC and DPPE are completely miscible and exist as lamellae. At higher PLPC content (> 50 mol%), thermodynamic and spectral data are indicative of phase separation of the two components over the temperature range examined.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1016/0009-3084(96)02574-1" target="_blank" rel="noreferrer noopener">10.1016/0009-3084(96)02574-1</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article or Conference Abstract Publication
1996
bilayer
bilayers
Biochemistry & Molecular Biology
Biophysics
Checchetti A
Chemistry and Physics of Lipids
Chidichimo G
Cholesterol
DSC
fusion
Golemme A
Grasso D
H-2-NMR
Journal Article or Conference Abstract Publication
LaRosa C
LECITHIN
lipid
lysolecithin
membranes
mixtures
nuclear-magnetic-resonance
P-31-NMR
phosphatidylcholine vesicles
phosphatidylethanolamine
transition
Westerman P W