Abstract: Preparations comprising, especially, globin that is insoluble at neutral pH, and therefore at physiological pH, in which the globin has been obtained from whole blood by depigmentation in a medium that extracts or dissolves the haem but leaves the globin and the other constituents of proteinic nature in a substantially undissolved state, a process for the production of those preparations, and uses, especially for the filling, healing or regeneration of tissues, especially for chronic wounds and osseous healing or regeneration.

Abstract: The invention relates to a process for the preparation of sterile collagen, especially injectable collagen, comprising the steps of preparing a purified acidic collagen solution, filtering that solution through a filter or a sterile membrane, precipitating the filtered solution in the form of a suspension, and concentrating the collagen suspension, in which process the suspension is placed in an elongate supple tubular filter constituting a porous filtering wall, permeable to the liquid but not permeable to the collagen fibres, and is concentrated by the slow passage of the liquid through the wall, without any pressure other than gravity, in order to prevent the filtering wall from becoming clogged by the collagen fibres, optionally with absorption of the liquid by an absorbent layer covering the wall or forming part of that wall, and the subsequent flowing-away and/or evaporation of the liquid via the face of the layer remote from the wall, and collagen preparations obtained.