A preventive or remedy for infection, an anti-endotoxin agents, a vaccine adjuvants and a growth promoter each comprising a sugar cane-derived extract as an active ingredient which agent is safe to man and animals. Each half-head comprises grip mechanism for grasping a respective section of rail and two electrodes suitable for contact with respective sections of rail in order to carry out a flash butt weld. The substantially tubular member includes a body formed by an outer surface, an inner surface, an upper lip surface connecting the outer surface to the inner surface and a document landing surface.