Linked Life Data

1122281

Source:http://linkedlifedata.com/resource/pubmed/id/1122281

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1975-7-7
pubmed:abstractText
The effects of various ions and 2H2O on the thermal properties of phosphatidylcholine dispersions were studied using differential scanning calorimetry and the change in the surface potential of monolayers with temperature. The phosphatidylcholine in 2H2O dispersion exhibits a slightly higher transition temperature and lower enthalpy of melting than a phosphatidylcholine in H2O dispersion. Monovalent (H+, Na+, and Li+) and some divalent cations of chloride salts (Ba2+, Mg2+, and Sr2+) have no effect on the thermal properties of phosphatidylcholine, while halide salts of the di-positive ions Cd2+ and Ca2+ have an effect on both the enthalpy of melting and transition temperature. No effect attributable to the metal ion was observed in non-halide salts of cadmium. The chloride salt of La3+ has no effect on lipid thermal properties whereas that of Fe3+ affects the transition temperature. The enthalpy of melting of phosphatidylcholine in one molar solutions of potassium salts increases in the order: CNS minus greater than acetate greater than I minus. Such large, polarizable anions clearly interact with phosphatidylcholine and must therefore also confer a negative charge on the lipid. The potassium salt of SO4-2 minus has no effect. Possible origins of the observed trends are discussed.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
14
pubmed:volume
375
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
317-26
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1975
pubmed:articleTitle
A calorimetric and monolayer investigation of the influence of ions on the thermodynamic properties of phosphatidylcholine.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.