Abstract: The present disclosure relates to a composition for preparing a vinyl chloride-based polymer and a method of preparing a vinyl chloride-based polymer using the same, and provides the composition giving excellent productivity for preparing a vinyl chloride-based polymer includes while maintaining excellent foaming and viscosity properties of a plastisol including the prepared vinyl chloride-based polymer, by including a pH regulator composed of a carbonate-based metal salt, and a transition metal catalyst in the composition, and controlling an amount of the transition metal catalyst, and controlling an amount of a reducing agent such that a trace amount or none of the reducing agent is included, and the method of preparing a vinyl chloride-based polymer using the same.

Abstract: Disclosed herein are a catalyst for hydrocracking reaction of high molecular weight components in bio-oil, a method for preparing the same and a method for bio-oil upgrading using the same. The catalyst includes a zeolite carrier; and at least one metal selected from the group consisting of nickel (Ni), ruthenium (Ru) and cerium (Ce) supported on the carrier. The catalyst promotes the hydrocracking of high molecular weight compounds contained in the bio-oil, but also inhibits the polymerization reaction of the decomposed product, thereby more effectively enhancing the hydrocracking reaction of the bio-oil.

Abstract: A space transformer for a probe card includes: a multilayered circuit board having first and second faces which face each other and a plurality of side faces connecting the first and second faces; a plurality of channels including a first pad formed on the first face and receiving an electrical signal applied from the exterior, a second pad formed on the second face, to which a probe is connected, and a through wiring penetrating the multilayered circuit board and connecting the first and second pads; and side wirings formed on the side faces and connecting first and second pads of a damaged channel among a plurality of channels. When a portion of channels transferring an electrical signal to probes is damaged, the space transformer can repair the damaged channel by means of the side wirings.