Fig. 2From: “Two-birds-one-stone” colon-targeted nanomedicine treats ulcerative colitis via remodeling immune microenvironment and anti-fibrosisCharacterization of the NPs. A The size distribution, ζ potential, and TEM image (scale bar: 200 nm) of PLGA NPs and CS-PLGA NPs. B–D XRD spectra. E Stability of the NPs in simulated colonic fluids. F Cumulative release of SV in three release media with different pHBack to article page