Diffusion of mixed micelles of bile salt-lecithin in amylopectin gels: A Fourier transform infrared microspectroscopy approach

Sun, Li‐Hui; Durrani, C. Matin; Donald, Athene M.; Fillery-Travis, Annette; Leney, John

doi:10.1016/s0301-4622(96)02193-x

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Cryo-tem and Dls Results1

Introduction1

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2010

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Cited by 7 publications

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“…From the literature, it is known that the DMM diameter is about 4 nm [56]. The diameters of the nanodroplets in our systems were similar to those reported in the literature within the range of error of the repeated mea- surements.…”

Section: Cryo-tem and Dls Resultssupporting

confidence: 89%

Do food microemulsions and dietary mixed micelles interact?

Rozner¹,

Shalev²,

Shames³

et al. 2010

Colloids and Surfaces B: Biointerfaces

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Section: Cryo-tem and Dls Resultssupporting

confidence: 89%

Do food microemulsions and dietary mixed micelles interact?

Rozner¹,

Shalev²,

Shames³

et al. 2010

Colloids and Surfaces B: Biointerfaces

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“…Mutual-diffusion coefcients can be extracted from these measurements. NMR imaging, 13,16 uorescence, 15 neutron transmission, 17 and vibrational spectroscopy 14,[18][19][20][21] have been used for concentration pro ling. Raman spectroscopy has been shown to be particularly useful for concentration pro ling.…”

Section: Introductionmentioning

confidence: 99%

Raman Spectroscopy as a Tool for Measuring Mutual-Diffusion Coefficients in Hydrogels

Kwak

Lafleur

2003

Appl Spectrosc

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Raman spectroscopy has been exploited to characterize the diffusion properties of solutes in hydrogels. Raman active vibrations were used as intrinsic probes of the solute concentration along gel cylinders. The resulting one-dimensional solute distribution, characterized as a function of both time and space, could be analyzed with a model based on Fick's diffusion law, and the mutual-diffusion coefficient (Dm) was then determined. To illustrate the potential of this approach, we measured the Dm of two polyethylene glycols (PEG) in Ca-alginate gels. In this case, the intensity of the CH stretching band was used to obtain the concentration profiles of PEGs, whereas the OH stretching band of water was used as an internal intensity standard. In addition to providing a straightforward approach to measuring diffusion coefficients, the Raman profile analysis provides information relative to the accessibility of gels to large molecules. As an example, it was found that the PEG penetration in Ca-alginate gels was restricted, a phenomenon that was dependent on PEG size. The Raman technique presented here effectively characterizes transport properties of solutes in gels, and such characterization is required for developing several technical applications of gels, such as their use as materials for controlled release of drugs.

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