Molecular Simulation and Experimental Study on Adsorptive Separation of the Ar/He Gas Mixture by Two Metal-Organic Frameworks at Room and Lower Temperatures.

This study combines molecular simulation and experimental methods to investigate the adsorptive separation performance of two metal-organic frameworks (MOFs), ZIF-67 and MIL-53(Al), for Ar/He mixed gases. Experimental and simulation adsorption isotherm data were obtained at temperatures of 298, 200, and 150 K for both Ar and He single-component adsorbates. The ideal adsorbed solution theory (IAST) and grand canonical Monte Carlo (GCMC) simulations calculated the Ar/He selectivity coefficients at different temperatures.

Oral delivery of sodium alginate/chitosan bilayer microgels loaded with Lactobacillus rhamnosus GG for targeted therapy of ulcerative colitis.

Probiotics regulate intestinal flora balance and enhance the intestinal barrier, which is useful in preventing and treating colitis. However, they have strict storage requirements. In addition, they degrade in a strongly acidic environment, resulting in a significant decrease in their activity when used as microbial agents.