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- W1975241569 abstract "The chain dynamics and the thermotropic phase behavior of sterically stabilized liposomes obtained introducing in the host bilayer matrix of DPPC up to 7 mol% of the polymer-lipid DPPE-PEG:2000 were investigated by spin label electron spin resonance spectroscopy and spectrophotometry. The experimental data indicate that the dispersions have the dynamic and thermotropic characteristics of normal lamellar phase. Moreover, using spin labels that locate both in the interfacial and in the hydrocarbon regions, namely TEMPO-stearate, 5- and 16-PCSL, we find that relative to the unmodified DPPC bilayers, the polymer-grafted bilayers are loosely packed in the interfacial region and have reduced chain mobility in the gel phase. From the temperature dependence of the partition coefficient (P(c)), of the spin probe DTBN between the aqueous and the fluid hydrophobic regions of the bilayers and from the melting curves of the absorbance at 400 nm, we observe a slight influence on the endothermic phase transitions when increasing the concentration of the polymer-lipid in the DPPC bilayers, the influence being more evident in the pre-transition." @default.
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- W1975241569 date "1998-10-01" @default.
- W1975241569 modified "2023-09-24" @default.
- W1975241569 title "Sterically stabilized liposomes of DPPC/DPPE-PEG:2000. A spin label ESR and spectrophotometric study" @default.
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- W1975241569 doi "https://doi.org/10.1016/s0301-4622(98)00187-2" @default.
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