Abstract: The present invention relates to a novel polycyclic compound employed in an organic layer of an organoelectro luminescent device, wherein the organoelectro luminescent device employing the compound according to the present invention has remarkably improved luminous efficiency and a long lifespan. According to the present invention, it is possible to implement a highly efficient and long-life organoelectro luminescent device that can be effectively applied to various display devices.

Abstract: The present invention provides an organic compound represented by: an organic light emitting diode and an organic light emitting display device using the organic compound. The organic compound of the present invention is capable of reducing a driving voltage of an organic light emitting diode and improving an emitting efficiency and a lifetime of the organic light emitting diode and the organic light emitting display device including the organic compound.

Abstract: Provided is a two-liquid type hemostatic composition that may be used adjunctively during a wide range of bleeding events and surgeries, and a method for preparing the same. The two-liquid type hemostatic composition does not contain blood products, comprises a first solution containing chitosan and a second solution containing a glucose or cellulose compound, may be easily applied in a liquid form to a wound or surgical bleeding site of the human body, and may help hemostasis and recovery by immediately forming a hydrogel at the bleeding area.

Abstract: The present invention relates to a method for preparing a contact lens-shaped amniotic dressing and a contact lens-shaped amniotic dressing prepared therefrom for treating ocular surface diseases, which does not require the use of sutures or an adhesion material. The inventive contact lens-shaped amniotic dressing is capable of solving the problems associated with suturing an amniotic membrane, e.g., highly delicate surgical techniques of suturing, long surgery time, stitch abscess, granuloma formation, tissue necrosis, and discomfort of patients; and the problems associated with the use of a support, e.g., the elimination of the support by eye blinking, breaking of the support, and discomfort.

Abstract: The present invention relates to a biological implantation material and method of preparing the same, which comprises the steps of: (i) treating a tissue derived from animal or human with alcohol; (ii) contacting the said tissue with an enzyme selected from the group consisting of dispase, DNAse, RNAse and pepsin in a solvent; (iii) treating the tissue obtained in step (ii) with alkaline solution; and (iv) treating the tissue obtained in step (iii) with acid solution.

Abstract: The present invention relates to RFID (radio frequency identification), more particularly to an RFID tag attached to a tooth and a system for using the same. The tooth-attached RFID tag of the present invention comprises a chip for storing the user's information, an antenna for transmitting the user information stored in the chip, a housing for fixing the chip and the antenna and a protective resin attached to a tooth for covering the housing, so that it may be protected from food or saliva. The semi-permanent tooth-attached RFID tag of the present invention offers an effective way of user identification.