Abstract: The present disclosure provides a method for preparing a composition including mesenchymal stem cells, extracellular vesicles produced by the mesenchymal stem cells, and growth factors, the composition prepared by the method, and use of the composition for treating arthritis. The composition of the present disclosure achieves the effect of treating arthritis through various efficacy experiments.

Abstract: A sealing article includes a body and a coating layer disposed on at least one surface of the body. The body comprises a polymeric elastomer such as perfluoroelastomer or fluoroelastomer. The coating layer comprises at least one metal. The sealing article may be a seal, a gasket, an O-ring, a T-ring or any other suitable product. The sealing article is resistant to ultra-violet (UV) light and plasma, and may be used for sealing a semiconductor processing chamber.

Abstract: A method of making a sealing article that includes a body and a coating layer disposed on at least one surface of the body. The body comprises a polymeric elastomer such as perfluoroelastomer or fluoroelastomer. The coating layer comprises at least one metal. The sealing article may be a seal, a gasket, an O-ring, a T-ring or any other suitable product. The sealing article is resistant to ultra-violet (UV) light and plasma, and may be used for sealing a semiconductor processing chamber.

Abstract: Disclosed is a wheeled scooter having a main body with a bottom, a front side, a rear side and two opposite lateral sides. A plurality of engagement lugs are formed on the front side of the main body. A plurality of engagement grooves are formed in the rear side of the main body and are adapted to engage with engagement lugs on a main body of an additional scooter to connect the main body of the scooter to the main body of the additional scooter. The scooter includes a grip mounted to each respective lateral side of the main body, each grip including an inner bar and an outer bar operably mounted to the respective lateral side of the main body by front and rear bars. The outer bar of each grip is configured to shield and protect a user's hand while holding the inner bar.

Abstract: Disclosed is a handguard structure for a movable scooter. A main body of the scooter is a plate-like body, which has a bottom to which wheels are mounted. A grip is provided on each of left and right sides of the main body. A number of engagement lugs is formed on a front side of the main body and engagement grooves corresponding in number to and respectively engageable with the engagement lugs are formed in a rear side of the main body so that through engagement between the engagement lugs and the engagement grooves, a plurality of main bodies is connectable in cascade to form a scooter in a long line. The grip includes an outer bar mounted to and spaced from the left or right side of the main body to define a shielded space and an inner bar arranged in the shielded space and fixed to the main body.