Jinkee Lee

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Ion-mediated changes in xylem hydraulic resistance are hypothesized to result from hydrogel like properties of pectins located in the bordered pit membranes separating adjacent xylem vessels. Although the kinetics of the ion-mediated changes in hydraulic resistance are consistent with the swelling/deswelling behavior of pectins, there is no direct evidence(More)
Polymeric particles are used in a variety of applications such as systems for controlled chemical release, [1–9] optical materials , [10, 11] chromatographic media, [12] and various biological applications. [13–16] The physical and chemical properties of polymeric particles, such as their shape, size, porosity, surface charge, and hydrophilicity or(More)
We elucidate mechanisms for colloidal gelation of attractive nanoemulsions depending on the volume fraction (ϕ) of the colloid. Combining detailed neutron scattering, cryo-transmission electron microscopy and rheological measurements, we demonstrate that gelation proceeds by either of two distinct pathways. For ϕ sufficiently lower than 0.23, gels exhibit(More)
Introduction: Estimates of metabolites in the brain using large-FOV chemical shift imaging (CSI) are severely hampered by strong lipid signals even though the interfering signal arises from subcutaneous tissue. Since SNR in MR is proportional to voxel size [1] the low metabolite concentration, and therefore low SNR in spectroscopic imaging dictates large(More)
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