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Titolo:
INTERACTION OF PHOSPHOTUNGSTATE IONS WITH PHOSPHOLIPID MONOLAYERS - ASYNCHROTRON X-RAY STUDY
Autore:
BARNES GT; GENTLE IR; KENNARD CHL; PENG JB; JAMIE IM;
Indirizzi:
UNIV QUEENSLAND,DEPT CHEM BRISBANE QLD 4072 AUSTRALIA UNIV COLL NEW S WALES,DEPT PHYS CANBERRA ACT AUSTRALIA
Titolo Testata:
Langmuir
fascicolo: 1, volume: 11, anno: 1995,
pagine: 281 - 285
SICI:
0743-7463(1995)11:1<281:IOPIWP>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
DRYING-INDUCED ARTIFACTS; ELECTRON-MICROSCOPY; SURFACTANT DISPERSIONS; PHASES; DIFFRACTION; STAINS; WATER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
G.T. Barnes et al., "INTERACTION OF PHOSPHOTUNGSTATE IONS WITH PHOSPHOLIPID MONOLAYERS - ASYNCHROTRON X-RAY STUDY", Langmuir, 11(1), 1995, pp. 281-285

Abstract

The surface pressure-area isotherms of monolayers of several phospholipids are markedly altered by the presence of phosphotungstate ions inthe aqueous subphase at low values of pH (Gorwyn, D.; Barnes, G. T. Langmuir 1990, 6, 222). These changes have now been studied by grazing incidence synchrotron X-ray diffraction. Where the monolayer was in a condensed monolayer state the 2 theta scans revealed a single peak consistent with hexagonal packing of the acyl chains despite the diacyl structure of the phospholipids. Addition of phosphotungstate to the subphase at pH 2 caused this peak to disappear, suggesting a disruption of the regular chain packing, and examination of the concomitant surface pressure-area isotherms showed that there had been a transition froma condensed to an expanded phase.

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Documento generato il 15/07/20 alle ore 04:14:22