Abstract: A method for preparing an engineered microvessel is provided. The method includes: obtaining a first dispersion by mixing a thrombin solution, a vascular endothelial cell suspension, a cardiomyocyte suspension, and a portion of a mixed culture medium, and obtaining a second dispersion by mixing a fibrinogen solution, a collagen solution, and another portion of the mixed culture medium, wherein the mixed culture medium includes a vascular endothelial cell culture medium and a cardiomyocyte culture medium; obtaining a gel pre-polymerisation solution by mixing the first dispersion and the second dispersion, and obtaining a cellular entity by curing the gel pre-polymerisation solution; and obtaining an engineered microvascular entity by placing the cellular entity in the mixed culture medium at a static status for static culture, and then placing the cellular entity in the mixed culture medium at a flowing status for dynamic culture.

Abstract: A method for preparing an engineered microvessel is provided. The method includes: obtaining a first dispersion by mixing a thrombin solution, a vascular endothelial cell suspension, a cardiomyocyte suspension, and a portion of a mixed culture medium, and obtaining a second dispersion by mixing a fibrinogen solution, a collagen solution, and another portion of the mixed culture medium, wherein the mixed culture medium includes a vascular endothelial cell culture medium and a cardiomyocyte culture medium; obtaining a gel pre-polymerisation solution by mixing the first dispersion and the second dispersion, and obtaining a cellular entity by curing the gel pre-polymerisation solution; and obtaining an engineered microvascular entity by placing the cellular entity in the mixed culture medium at a static status for static culture, and then placing the cellular entity in the mixed culture medium at a flowing status for dynamic culture.

Abstract: The present invention relates to a bimetallic mercaptan conversion catalyst for sweetening liquefied petroleum gas at a low temperature, which is prepared by using an Al2O3—SiO2 composite oxide as a carrier to support bimetallic active components vanadium and nickel. The bimetallic mercaptan conversion catalyst has a proper specific surface area and more metal active center sites, and has advantages of simple preparation, an efficient mercaptan conversion ability even at a low temperature, and causing no saturation and polymerization of olefins. The bimetallic mercaptan conversion catalyst exhibits superior mercaptan conversion performance in LPG sweetening, has strong adaptability to starting materials, and can also nearly completely remove trace carbonyl sulfide contained in LPG.

Abstract: The present invention relates to a bimetallic mercaptan conversion catalyst for sweetening liquefied petroleum gas at a low temperature, which is prepared by using an Al2O3—SiO2 composite oxide as a carrier to support bimetallic active components vanadium and nickel. The bimetallic mercaptan conversion catalyst has a proper specific surface area and more metal active center sites, and has advantages of simple preparation, an efficient mercaptan conversion ability even at a low temperature, and causing no saturation and polymerization of olefins. The bimetallic mercaptan conversion catalyst exhibits superior mercaptan conversion performance in LPG sweetening, has strong adaptability to starting materials, and can also nearly completely remove trace carbonyl sulfide contained in LPG.