Abstract: The present invention relates to a novel ginsenoside glycosidase protein derived from the genus Terrabacter, the protein having an activity of converting protopanaxadiol (PPD)-type saponins into highly active substances, which can be absorbed inside the body, by selective hydrolysis of a particular bond of ginsenoside. More specifically, the present invention relates to an amino acid sequence of the protein, a nucleic acid sequence encoding the protein, a recombinant vector comprising the nucleic acid sequence, and a transformant transformed with the vector, and a method for producing ginsenoside glycosidase derived from the genus Terrabacter by culturing the transformant, a method for converting PPD-type major saponins into the minor saponin forms using the protein, and a composition for converting PPD-type saponins into soluble saponins, comprising the protein as an active component.

Abstract: The present invention relates to a conductive metal ink composition which is properly applied for roll-printing process to form conductive pattern with improved conductivity, and the method of preparing a conductive pattern using the same. The conductive metal ink composition comprises a conductive metal powder; an organic silver complex where an organic ligand including amine group and hydroxyl group binds with a silver (Ag) salt of aliphatic carboxylic acid; a non-aqueous solvent comprising a first non-aqueous solvent having a vapor pressure of 3 torr or lower at 25° C. and a second non-aqueous solvent having a vapor pressure of higher than 3 torr at 25° C.; and a coatability improving polymer.

Abstract: The present invention relates to a conductive metal ink composition which is properly applied for roll-printing process to form conductive pattern, and the method of preparing a conductive pattern using the same. The conductive metal ink composition comprises a conductive metal powder; a non-aqueous solvent comprising a first non-aqueous solvent having a vapor pressure of 3 torr or lower at 25° C. and a second non-aqueous solvent having a vapor pressure of higher than 3 torr at 25° C.; and a coatability improving polymer and is coated for forming the conductive pattern by the roll printing method.

Abstract: The present invention relates to Rhodanobacter ginsenosidimutans KCTC22231T-derived ginsenoside glycosidase and use thereof, and this protein has an activity of converting PPD (protopanaxadiol)-type saponins into in vivo absorbable, highly active deglycosylated saponins by selective hydrolysis of a bond at a particular position of ginsenoside. More particularly, the present invention relates to an amino acid sequence constituting the protein, a nucleic acid sequence encoding the protein, a recombinant vector comprising the nucleic acid sequence, a transformant transformed with the vector, a method for preparing Rhodanobacter ginsenosidimutans KCTC22231T-derived ginsenoside glycosidase by culturing the transformant, a method for converting PPD (protopanaxadiol)-type major ginsenoside into a rare ginsenoside that is absorbable in vivo using the protein, and a composition for converting PPD-type saponins into in vivo absorbable saponins, comprising the protein as an active ingredient.

Abstract: Disclosed are lead free glass frit powder for manufacturing a silicon solar cell, its producing method, a metal paste composition containing the same and a silicon solar cell. The lead free glass frit powder for manufacturing a silicon solar cell includes Bi2O3; B2O3; and any one metal oxide selected from the group consisting of ZnO, Al2O3 and BaCO3, or mixtures thereof. The glass frit powder is free of lead, and thus, it is environmental friendly. A front electrode of a solar cell formed using the glass frit powder has low resistance against contact with a substrate and high adhesion to the substrate.

Abstract: Disclosed is ink for ink jet printing, which comprises: metal nanoparticles comprising a surfactant attached to surfaces thereof; and a first solvent, wherein the metal nanoparticles are present in an amount of 50˜70 parts by weight based on 100 parts by weight of the ink, and the surfactant is present in an amount of 0.5˜5 parts by weight based on 100 parts by weight of the metal nanoparticles. Metal nanoparticles used in the ink and a method for preparing the metal nanoparticles are also disclosed. The method for preparing metal nanoparticles for use in ink for ink jet printing comprises a step of washing surplus surfactant with at least one solvent. By doing so, the surplus surfactant remaining on the surfaces of the metal nanoparticles can be minimized, resulting in a drop in viscosity of ink comprising the metal nanoparticles.

Abstract: The present invention relates to a conductive pattern and a method for forming the conductive pattern, and more particularly, to a method for forming a conductive pattern, which comprises the steps of 1) preparing a substrate; 2) forming a first pattern by printing a first composition that includes an adhesion promoter and a solvent on the substrate; 3) forming a second pattern by printing a second composition that includes a conductive particle and a solvent on the first pattern; and 4) sintering the first pattern and the second pattern. The method for forming the conductive pattern according to the present invention may improve an adhesion property between a pattern and a substrate and may form a fine pattern having high resolution without formation of bank on a hydrophobic substrate.

Abstract: Disclosed is ink for ink jet printing, which comprises: metal nanoparticles comprising a surfactant attached to surfaces thereof; and a first solvent, wherein the metal nanoparticles are present in an amount of 50˜70 parts by weight based on 100 parts by weight of the ink, and the surfactant is present in an amount of 0.5˜5 parts by weight based on 100 parts by weight of the metal nanoparticles. Metal nanoparticles used in the ink and a method for preparing the metal nanoparticles are also disclosed. The method for preparing metal nanoparticles for use in ink for ink jet printing comprises a step of washing surplus surfactant with at least one solvent. By doing so, the surplus surfactant remaining on the surfaces of the metal nanoparticles can be minimized, resulting in a drop in viscosity of ink comprising the metal nanoparticles.

Abstract: Disclosed is a dispersion adjuvant for metal nanoparticles, which comprises an amide derivative. Metal nanoink comprising the dispersion adjuvant is also disclosed. The dispersion adjuvant helps metal nanoparticles to be dispersed in a solvent in the presence of a dispersant, inhibits metal particles from agglomerating among themselves, and increases the content of metal nanoparticles in a solvent. Additionally, interconnection lines formed by using the nanoink have an increased content of metal per unit area, and thus provide improved conductivity.

Abstract: The present invention relates to a three-dimensional printing prototyping system which includes a prototyping chamber having a prototyping table capable of moving up and down by a predetermined range, a material containing chamber containing a powder material and having a material supply table capable of moving up and down by a predetermined range, and a material supplying means for supplying the powder material contained in the material containing chamber to the prototyping table as much as a sectional thickness corresponding to divided section data of a three-dimensional prototype to be prototyped.