Abstract: Provided is a method that efficiently forms a graft chain having a length the same as or greater than heretofore and/or that efficiently foams a graft layer having a thickness the same as or greater than those resulted from a known technique. A method for forming a graft layer according to an aspect of the present disclosure includes: a contact step of bringing a base member containing a polymer A into contact with a treatment liquid in which a compound B and a polymer C are contained in a solvent D; and, during the contact step, a polymerization step of graft-polymerizing the compound B onto the polymer A that constitutes at least a portion of the surface of the base member.

Abstract: There is provided a straddle type vehicle including: an engine; a fuel tank configured to store fuel to be supplied to the engine; a power generator driven by the engine; a regulator disposed below the fuel tank and configured to adjust electric power supplied from the power generator to a battery; and a regulator cover that includes a side wall covering the regulator on an outer side in a vehicle width direction and an upper wall covering an upper side of the regulator. The upper wall is formed below a side lower edge of the fuel tank to extend from an inner side to the outer side in the vehicle width direction with respect to the side lower edge.

Abstract: A manufacturing method of a sliding member for an artificial joint according to the present disclosure includes exposing a base member with ultraviolet rays in a state where the base member is in contact with an aqueous treatment solution containing a compound having 0.20 mol/L or more and less than 0.50 mol/L of phosphorylcholine group and a water-soluble inorganic salt.