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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.6b02257
|2 doi
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|a eng
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| 100 |
1 |
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|a Suga, Keishi
|e verfasserin
|4 aut
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|a Characterization of Aqueous Oleic Acid/Oleate Dispersions by Fluorescent Probes and Raman Spectroscopy
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|c 2016
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|a Text
|b txt
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|a ƒaComputermedien
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|a Date Completed 30.05.2018
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|a Date Revised 30.05.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Oleic acid (OA) and oleates form self-assembled structures dispersible in aqueous media. Herein, the physicochemical properties of OA/oleate assemblies were characterized using fluorescent probes and Raman spectroscopy, under relatively high dilution (<100 mM of total amphiphile) at 25 °C. Anisotropy analysis using 1,6-diphenyl-1,3,5-hexatriene showed that the microviscosity of the OA/oleate assembly was highest at pH 7.5 (the pH range of 6.9-10.6 was investigated). The fluorescence spectra of 6-lauroyl-2-dimethylaminonaphthalene revealed the dehydrated environments on membrane surfaces at pH < 7.7. The pH-dependent Raman peak intensity ratios, chain torsion (S = I1124/I1096) and chain packing (R = I2850/I2930), showed local maxima, indicating the occurrence of metastable phases, such as dispersed cubic phase (pH = 7.5), vesicle (pH = 8.5), and dispersed cylindrical micelle (pH = 9.7). These results suggest that large-scale OA/oleate assemblies could possess particular membrane properties in a narrow pH region, e.g., at pH 7.5, and 9.7
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Kondo, Dai
|e verfasserin
|4 aut
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|a Otsuka, Yoko
|e verfasserin
|4 aut
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|a Okamoto, Yukihiro
|e verfasserin
|4 aut
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|a Umakoshi, Hiroshi
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1999
|g 32(2016), 30 vom: 02. Aug., Seite 7606-12
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|x 1520-5827
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| 773 |
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|g volume:32
|g year:2016
|g number:30
|g day:02
|g month:08
|g pages:7606-12
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|u http://dx.doi.org/10.1021/acs.langmuir.6b02257
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