Abstract: Compounds or salts thereof represented by formula (I): wherein X indicates a leaving group, Y indicates an affinity peptide having a binding region in a CH2 domain in an immunoglobulin unit comprising two heavy chains and two light chains, M indicates a trivalent group linking the carbon atom in C?O adjacent to M and the carbon atom in C?W via a main chain portion consisting of 3 to 5 carbon atoms, O indicates an oxygen atom, S indicates a sulfur atom, W indicates an oxygen atom or a sulfur atom, N3 indicates an azide group, La indicates a bond or a divalent group, and Lb indicates a bond or a divalent group; and antibodies or salts thereof which can be prepared using such a compound or salt thereof, are useful for controlling the bonding ratio of an antibody and a modifying group within a desired range.

Abstract: A massage device includes a base sheet with a sheet shape and an air bag supported by the base sheet. When one surface of the base sheet is a front surface and a surface opposite to the front surface is a back surface, the air bag includes a bag that is located on a side of the front surface of the base sheet, and that is inflated with air intake and deflated with air exhaust, and a sandwiching portion that is located on a side of the back surface of the base sheet and sandwiches the base sheet between the sandwiching portion and the bag in a thickness direction.

Abstract: An airbag includes: a welding portion that bonds peripheral edges of a pair of sheet portions to each other to form a bag shape, in which the airbag is formed to have a pair of holding portions that holds a held body portion therebetween, and at least one of the two sheet portions is formed with a pair of melting portions extending in directions away from mutually facing portions of the two holding portions in the welding portion.

Abstract: An airbag includes: a welding portion that bonds peripheral edges of a pair of sheet portions to each other to form a bag shape, in which the airbag is formed to have a pair of holding portions that holds a held body portion therebetween, and at least one of the two sheet portions is formed with a pair of melting portions extending in directions away from mutually facing portions of the two holding portions in the welding portion.