Abstract: A hologram projection apparatus according to an embodiment of the present invention includes: a hologram image projector configured to project a hologram test image for testing a hologram image onto a projection plate through a plurality of projection modules projecting R, G, and B images, respectively; an optimal angle calculation configured to calculate optimal projection angles of each of the projection modules when quality of the hologram test image does not satisfy reference quality; and a projection module adjuster configured to adjust angles of each of the projection modules to the optimal projection angles.

Abstract: The present invention relates to a carboxylation catalyst, which catalyzes carboxylation of a furan-based compound containing a hydroxyl group and a carbonyl group or a derivative thereof to prepare 2,5-furandicarboxylic acid (FDCA), and is configured as a spinel support, and noble metal nanoparticles incorporated into the spinel support selected from the group consisting of MnCo2O4, CoMn2O4, and combinations thereof, and to a method of preparing 2,5-furandicarboxylic acid (FDCA), including providing a carboxylation catalyst configured such that noble metal nanoparticles are incorporated into a spinel support; and carboxylating a furan-based compound containing a hydroxyl group and a carbonyl group or a derivative thereof in the presence of the carboxylation catalyst.

Abstract: The present invention relates to a catalyst for preparing 2,5-furandicarboxylic acid (FDCA), which is a catalyst for carboxylation of a furan-based compound containing a hydroxyl group and a carbonyl group or a derivative thereof and is configured such that noble metal nanoparticles are incorporated into a spinel-type support, and to a method of preparing 2,5-furandicarboxylic acid (FDCA), including carboxylating a furan-based compound containing a hydroxyl group and a carbonyl group or a derivative thereof in the presence of a catalyst configured such that noble metal nanoparticles are incorporated into a spinel-type support.

Abstract: Disclosed is a method for preparing a semi-furanic copolyamide containing at least one furanic dicarboxylic acid moiety and at least one aliphatic diamine moiety in the backbone. The method is based on solid-state polymerization. Particularly, the method uses a biomass-derived furanic dicarboxylic acid as a raw material. A semi-furanic copolyamide prepared by the method has molecular weight and color levels that are practically required in industrial applications. In addition, the semi-furanic copolyamide can replace fossil fuels due to its good thermal stability and is suitable for use as an environmentally friendly bioplastic.

Abstract: Disclosed is a method for preparing a semi-furanic copolyamide containing at least one furanic dicarboxylic acid moiety and at least one aliphatic diamine moiety in the backbone. The method is based on solid-state polymerization. Particularly, the method uses a biomass-derived furanic dicarboxylic acid as a raw material. A semi-furanic copolyamide prepared by the method has molecular weight and color levels that are practically required in industrial applications. In addition, the semi-furanic copolyamide can replace fossil fuels due to its good thermal stability and is suitable for use as an environmentally friendly bioplastic.