Abstract: Disclosed is a catalyst useful for producing organic amines by catalytic amination, its preparation and application thereof, wherein the catalyst comprises an inorganic porous carrier containing aluminum and/or silicon and an active metal component supported on the carrier, the active metal component comprises at least one metal selected from the group consisting of Group VIII and Group IB metals, and the carrier has an ammonia adsorption capacity of 0.25 to 0.65 mmol/g, as measured by NH3-TPD test. The catalyst has an improved performance, when used for producing organic amines by catalytic amination.

Abstract: The disclosure provides a biomedical composition, including: a hyaluronic acid; a modified histidine; and a polymer or C4-C20 alkane, wherein the modified histidine and the polymer or C4-C20 alkane are grafted to at least one primary hydroxyl group of the hyaluronic acid to allow the hyaluronic acid to form a hyaluronic acid derivative, wherein a graft ratio of the modified histidine is about 1-100%, and a graft ratio of the polymer or C4-C20 alkane is about 0-40%.

Abstract: An optical lens includes a barrel and a protruding boss unit. The barrel defines a receiving space in which a plurality of components are disposed and arranged along an axis, and includes a front wall. Each of the front wall and the components has front and rear confronting surfaces opposite to each other along the axis. The protruding boss unit is formed on and protrudes from one of the adjacent two front and rear confronting surfaces, and abuts against the other one of the adjacent two front and rear confronting surfaces. The other one of the front and rear confronting surfaces abutted by the boss unit is flat.

Abstract: The disclosure provides a biomedical composition, including: a hyaluronic acid; a modified histidine; and a polymer or C4-C20 alkane, wherein the modified histidine and the polymer or C4-C20 alkane are grafted to at least one primary hydroxyl group of the hyaluronic acid to allow the hyaluronic acid to form a hyaluronic acid derivative, wherein a graft ratio of the modified histidine is about 1-100%, and a graft ratio of the polymer or C4-C20 alkane is about 0-40%.

Abstract: An imaging lens includes a lens barrel, an imaging unit and a light shielding unit. The lens barrel includes a base wall formed with a light incident hole at an optical axis of the imaging lens and a surrounding wall that extends from and cooperates with the base wall to define a receiving space. The imaging unit includes a plurality of imaging components each having an annular front contact surface and an annular back contact surface. The light shielding unit includes an annular retaining portion clamped between an adjacent pair of the imaging components, an object-side protruding portion with a first edge, and an image-side protruding portion with a second edge.

Abstract: An imaging lens includes a lens barrel, an imaging unit and a light shielding unit. The lens barrel includes a base wall formed with a light incident hole at an optical axis of the imaging lens and a surrounding wall that extends from and cooperates with the base wall to define a receiving space. The imaging unit includes a plurality of imaging components each having an annular front contact surface and an annular back contact surface. The light shielding unit includes an annular retaining portion clamped between an adjacent pair of the imaging components, an object-side protruding portion with a first edge, and an image-side protruding portion with a second edge.