Abstract: According to a body structure of the present invention, a floor panel member is reinforced by a pair of first members, and the second member comprised of plural pipes is disposed along the width of a vehicle so as to integrate the first members. An end of the second member is extended along the longitudinal side of the vehicle and is fixed by welding in the state of penetrating into a side sill. There is no necessity of providing any reinforcement material because the second member has a high strength continuously along the width of the vehicle. Moreover, there is no necessity of increasing a board thickness for the purpose of securing the rigidity because the second member penetrates into the side sill. On the other hand, the second member can be manufactured by cutting an existing steel pipe to a predetermined side. It is therefore possible to cope with the change in the width of the vehicle only by changing a cutting size.

Abstract: A pair of cylindrical impact absorbing members, which is unintegrated with side members and is formed to have a substantially equilateral octagonal sectional form, is fixed on the side members in such a manner as to extend forward from the side members. Since the impact absorbing members are unintegrated with the side members, the impact absorbing members can be formed of optimum material with an optimum board thickness and can be formed to have an ideal sectional form by an optimum forming process under no restriction from a manufacturing method and the like for the side member.

Abstract: According to a body structure of the present invention, a floor panel member is reinforced by a pair of first members, and the second member comprised of plural pipes is disposed along the width of a vehicle so as to integrate the first members 1. An end of the second member is extended along the longitudinal side of the vehicle and is fixed by welding in the state of penetrating into a side sill. There is no necessity of providing any reinforcement material because the second member has a high strength continuously along the width of the vehicle. Moreover, there is no necessity of increasing a board thickness for the purpose of securing the rigidity because the second member penetrates into the side sill. On the other hand, the second member can be manufactured by cutting an existing steel pipe to a predetermined side, and it is therefore possible to cope with the change in the width of the vehicle only by changing a cutting size.

Abstract: The present invention offers biomaterials exhibiting excellent sustained-release property and degradation property such as that polypeptides or the like having a biological activity can be continuously released for a prescribed life span in vivo. The said biomaterials consist of a copolymer prepared by the reaction of lactic acid and/or glycolic acid and p-dioxanone with polyethylene glycol as main components.

Abstract: A good tissue-affinity and lack of antigenicity are required for the collagen used as the carrier of BMP. Conventional collagens have these properties only insufficiently. When the tyrosine content is below 2 residues/1000 residues, then the above properties of such collagens are good. Moreover, collagens excelling in the above properties can be readily obtained by using proteolytic enzymes.