Abstract: The present invention relates to a culture medium for isolating and culturing urine-derived stem cells, a method for isolating and culturing urine-derived stem cells using the culture medium, urine-derived stem cells cultured in the culture medium, and a cell therapy product composition containing same.

Abstract: A wear resistant steel material has high hardness and excellent cut crack resistance, that can be applied to a thick steel material of which the thickness is 60 mm or more, that is not cracked even after being cut using gas, and a method of manufacturing the wear resistant steel material.

Abstract: Provided are a hot press-formed part and a manufacturing method thereof, the hot press-formed part comprising: a base steel sheet; and a plating layer provided on at least one surface of the base steel sheet, wherein the plating layer includes an average number of Kirkendall voids per unit area in a specific range, in an area within 20 ?m from the interface between the base steel sheet and the plating layer.

Abstract: The present invention relates to: a steel material for hot forming, used for a vehicle, etc.; a hot formed part; and a method for manufacturing thereof.

Abstract: Provided are a plated steel sheet for hot press forming including: a base steel sheet containing, by wt %, 0.14 to 0.5% of C, 0.001 to 1% of Si, 0.3 to 4% of Mn, 0.001 to 0.015% of P, 0.0001 to 0.02% of S, 0.001 to 0.1% of Al, 0.001 to 1% of Cr, 0.001 to 0.02% of N, 0.1% or less of Ti, 0.01% or less of B, 0.005 to 0.1% of Sb, and a balance of Fe and unavoidable impurities; an aluminum or aluminum alloy plating layer provided on at least one surface of the base steel sheet; and a Sb-rich layer provided between the base steel sheet and the plating layer, wherein the plated steel sheet for hot press forming satisfies the following Relational Expressions 1-1 and 1-2, a hot press formed member manufactured using the same, and methods for manufacturing the plated steel sheet for hot press forming and the hot press formed member. [Relational Expression 1-1] Sb max Sb coat ? 1.2 [Relational Expression 1-2] ( S ? b max - Sb c ? o ? a ? t ) 2 × ? ? t ? 0.

Abstract: An aluminum-iron-plated steel sheet including a base steel sheet and an aluminum-based plating layer on a surface of the base steel sheet. The aluminum-based plating layer includes an alloyed layer on the surface of the base steel sheet and an aluminum layer on the alloyed layer. The alloyed layer may be formed of one or more of Fe3Al, FeAl(Si), Fe2Al5, and FeAl3. A thickness of the alloyed layer may be 90% or more of a thickness of the aluminum-based plating layer. A surface fraction of Ti may be 2% or less and a surface fraction of Zn may be 1% or less, as observed on the surface of the aluminum-based plating layer.

Abstract: The present invention provides an aluminum-based plated steel plate used in hot-press forming, the steel plate comprising: a base steel plate; and a plating layer formed on the base steel plate, wherein the plating layer comprises: an alloying layer formed on the surface of the base steel plate and including one or more of Fe3Al, FeAl(Si), Fe2Al5, and FeAl3; and an aluminum layer formed on the alloying layer and having a thickness less than 10% of the thickness of the plating layer, and the plating layer has a thickness of 5-20 ?m and an oxygen content of 10 weight % or less, as measured by GDS, at a depth of 0.1 ?m from the surface of the plating layer.

Abstract: Provided are plated steel sheets for hot press forming, hot press formed parts, and manufacturing methods thereof, the plated steel sheets comprising: a base steel sheet comprising, in weight %, C: 0.07 to 0.5%, Si: 0.05 to 1%, Mn: 0.5 to 5%, P: 0.001 to 0.015%, S: 0.0001 to 0.02%, Al: 0.01 to 0.18, Cr: 0.01 to 1%, N: 0.001 to 0.02%, Ti: 0.1% or less, B: 0.01% or less, Sn: 0.01 to 0.1%, and a balance of Fe and inevitable impurities; an aluminum or aluminum alloy plating layer disposed on at least one surface of the base steel sheet; and an Sn-enriched layer provided between the base steel sheet and the plating layer, wherein the Sn-enriched layer satisfies a specific relationship.

Abstract: The present disclosure relates to a plated steel sheet for hot press forming, having excellent paint adhesion and corrosion resistance after hot press forming; a preparation method for the plated steel sheet; and a hot press formed member. The plated steel sheet according to an aspect of the present disclosure comprises a base steel sheet and a plating layer consisting of Al—Fe alloy formed on the base steel sheet, wherein the sum of contents of Al and Fe in the plating layer is 80% or more by weight, the average content of Fe in the plating layer is 20% or more by weight, and the product of Ra and RPC of the surface of the plating layer may be 60-150 ?m/cm. Here, Ra represents arithmetic mean roughness and the unit thereof is ?m, and RPc represents the number of peaks per unit length and the unit thereof is /cm.

Abstract: Provided is a method of preparing a three-dimensional cell spheroid, the method including forming the cell spheroid by co-culturing adipose-derived stem cells or mesenchymal stem cells with hepatocytes. According to the cell spheroid prepared by the method, the secretome secreted by the adipose-derived stem cells affects hepatocyte maturation, and therefore, hepatic functions of the finally formed three-dimensional cell spheroid, i.e., organoid, may be enhanced. Further, a composition including a culture medium of the adipose-derived stem cells may prevent or treat liver diseases including hepatitis, hepatotoxicity, cholestasis, fatty liver, etc., and may enhance hepatic functions.

Abstract: The present invention provides an aluminum-based plated steel plate used in hot-press forming, the steel plate comprising: a base steel plate; and a plating layer formed on the base steel plate, wherein the plating layer comprises: an alloying layer formed on the surface of the base steel plate and including one or more of Fe 3Al, FeAl(Si), Fe 2Al 5, and FeAl 3; and an aluminum layer formed on the alloying layer and having a thickness less than 10% of the thickness of the plating layer, and the plating layer has a thickness of 5-20 ?m and an oxygen content of 10 weight % or less, as measured by GDS, at a depth of 0.1 ?m from the surface of the plating layer.

Abstract: The present disclosure relates to: a plated steel sheet which is for hot forming, has excellent hydrogen embrittlement resistance, and includes an Al-based plating layer formed on the surface of a base steel sheet, wherein the average Ni content in the Al-based plating layer is 0.05 to 0.35 wt %; and a method for manufacturing same.

Abstract: Provided are plated steel sheets for hot press forming, hot press formed parts, and manufacturing methods thereof, the plated steel sheets comprising: a base steel sheet comprising, in weight %, C: 0.07 to 0.5%, Si: 0.05 to 1%, Mn: 0.5 to 5%, P: 0.001 to 0.015%, S: 0.0001 to 0.02%, Al: 0.01 to 0.1%, Cr: 0.01 to 1%, N: 0.001 to 0.02%, Ti: 0.1% or less, B: 0.01% or less, Sn: 0.01 to 0.1%, and a balance of Fe and inevitable impurities; an aluminum or aluminum alloy plating layer disposed on at least one surface of the base steel sheet; and an Sn-enriched layer provided between the base steel sheet and the plating layer, wherein the Sn-enriched layer satisfies a specific relationship.

Abstract: The present invention pertains to a hot press forming member having excellent resistance to hydrogen embrittlement, and a method for manufacturing same. An aspect of the present invention provides a hot press forming member having excellent resistance to hydrogen embrittlement, the hot press forming member comprising a base steel plate and an alloy-plated layer formed on the surface of the base steel plate, wherein the alloy-plated layer contains pores such that pores having a size of 5 ?m or less constitute 3-30% of the surface area of the alloy-plated layer as viewed in a cross-section taken in the thickness direction of the member.

Abstract: The present disclosure provides a hot-press formed part comprising a plated steel sheet and an aluminum alloy plated layer formed on the plated steel sheet, wherein the aluminum alloy plated layer comprises: an alloying layer (I) formed on the plated steel sheet and containing, by weight %, 5-30% of Al; an alloying layer (II) formed on the alloying layer (I) and containing, by weight %, 30 to 60% of Al; an alloying layer (III) formed on the alloying layer (II) and containing, by weight %, 20-50% of Al and 5-20% of Si; and an alloying layer (IV) formed continuously or discontinuously on at least a part of the surface of the alloying layer (III), and containing 30-60% of Al, wherein the rate of the alloying layer (III) exposed on the outermost surface of the aluminum alloy plated layer is 10% or more.

Abstract: The present invention relates to a composition comprising, as an active ingredient, a stem cell-derived exosome having an improved skin regeneration, whitening, or antioxidation function. More specifically, the present invention relates to a cosmetic composition or pharmaceutical composition for skin regeneration, whitening, antioxidation, or wound treatment, comprising urine-derived stem cell-derived exosome as an active ingredient.

Abstract: The present disclosure relates to a microgel composition comprising collagen and hyaluronic acid and a method of preparing the same. The microgel according to an embodiment is composed of natural biocompatible substances and is non-toxic and has high mechanical stability or long persistence, and thus can be effectively used in a microgel composition, a three-dimensional scaffold composition, and a tissue-engineering scaffold.

Abstract: The present invention relates to: a steel material for hot forming, used for a vehicle and the like; a hot-formed member; and a method for manufacturing same. In the method, when the formed steel material is skin pass rolled, rolling pressure and roughness of skin pass rolling rolls are controlled so that bendability can be improved.

Abstract: The present disclosure provides a hot-press formed part comprising a plated steel sheet and an aluminum alloy plated layer formed on the plated steel sheet, wherein the aluminum alloy plated layer comprises: an alloying layer (I) formed on the plated steel sheet and containing, by weight %, 5-30% of Al; an alloying layer (II) formed on the alloying layer (I) and containing, by weight %, 30 to 60% of Al; an alloying layer (III) formed on the alloying layer (II) and containing, by weight %, 20-50% of Al and 5-20% of Si; and an alloying layer (IV) formed continuously or discontinuously on at least a part of the surface of the alloying layer (III), and containing 30-60% of Al, wherein the rate of the alloying layer (III) exposed on the outermost surface of the aluminum alloy plated layer is 10% or more.

Abstract: The present invention pertains to a hot press forming member having excellent resistance to hydrogen embrittlement, and a method for manufacturing same. An aspect of the present invention provides a hot press forming member having excellent resistance to hydrogen embrittlement, the hot press forming member comprising a base steel plate and an alloy-plated layer formed on the surface of the base steel plate, wherein the alloy-plated layer contains pores such that pores having a size of 5 ?m or less constitute 3-30% of the surface area of the alloy-plated layer as viewed in a cross-section taken in the thickness direction of the member.