Abstract: Provided is a block polymer including two or more polymer block As each having a value ? of 0.20 or less and a functional group F containing at least one element selected from a group consisting of nitrogen, silicon, oxygen, and sulfur in a part or all of terminals of the two or more polymer block As, in which the block polymer has a value ? of 0.75 or more, when p, q, r and s are defined as a component proportion (molar proportion) of a structural unit represented by Formula (1), a component proportion of a structural unit represented by Formula (2), a component proportion of a structural unit represented by Formula (3), and a component proportion of a structural unit represented by Formula (4), in the polymer, respectively.

Abstract: There is provided a polymer composition using which a molded product having excellent balance between rigidity, wear resistance, viscoelastic properties, and heat resistance can be obtained. A polymer composition according to the disclosure includes (A) a conjugated diene rubber (where, a polymer corresponding to the following component (B) is excluded); and (B) a hydrogenated product of a polymer that satisfies the following (1) to (3), which is a polymer in which 80% or more of structural units derived from butadiene are hydrogenated: (1) being a copolymer of a conjugated diene compound containing butadiene and an aromatic vinyl compound, (2) including a polybutadiene block having a vinyl group content of 20% or less, and (3) including a block composed of a conjugated diene compound and an aromatic vinyl compound.

Abstract: Provided is a method for introducing a selected molecule, including: an inhibitor treatment step of allowing a target cell or a target tissue to internalizing an inhibitor of vesicular transport or lysosomal membrane fusion; and an introduction step of contacting an introduction liquid containing a selected molecule with the target cell or the target tissue to introduce the selected molecule into the target cell or the target tissue.

Abstract: Provided is a method for introducing a selected molecule, including: an inhibitor treatment step of allowing a target cell or a target tissue to internalizing an inhibitor of vesicular transport or lysosomal membrane fusion; and an introduction step of contacting an introduction liquid containing a selected molecule with the target cell or the target tissue to introduce the selected molecule into the target cell or the target tissue.