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- W2324503525 abstract "The interaction between dodecyltrimethylammonium bromide (DTAB) and curcumin has been studied in pH 5.0 sodium phosphate buffer using absorption and fluorescence measurements. With increasing DTAB concentration (CDTAB) from 0 to 20 mM, the absorption peak of curcumin at 430 nm, corresponding to the conjugated structure of curcumin, first weakens gradually into a shoulder but increases back into one peak with much higher absorption intensity. On the contrary, as CDTAB increases, the initial small absorption shoulder of curcumin at 355 nm, corresponding to the feruloyl unit of curcumin, first increases gradually into a clear peak but decreases back into one shoulder until almost disappeared finally. By remaining at nearly the same wavelength, the fluorescence of curcumin first decreases at CDTAB lower than 5 mM and then increases gradually up to CDTAB = 10 mM, which is followed by sharp increases of fluorescence intensity with marked blue-shifts at higher CDTAB. The values of anisotropy and microviscosity of curcumin obtained from the fluorescence polarization technique also showed pronounced changes at different surfactant concentrations. The interaction mechanisms of DTAB with curcumin have been presented at low, intermediate, and high surfactant concentrations, which is relating to interaction forces, surfactant aggregations, as well as structural alterations of curcumin." @default.
- W2324503525 created "2016-06-24" @default.
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- W2324503525 date "2011-11-02" @default.
- W2324503525 modified "2023-09-27" @default.
- W2324503525 title "Spectrometric Study on the Interaction of Dodecyltrimethylammonium Bromide with Curcumin" @default.
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- W2324503525 doi "https://doi.org/10.1021/la203592j" @default.
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