This invention provides novel composite biomaterials having excellent bioadaptability and bone inductivity and a process for producing the same. The composite biomaterials comprise hydroxyapatite, collagen, and alginate and have microporous structures in which the c-axis of the hydroxyapatite is oriented along the collagen fibers.

 
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> Aqueous colloidal dispersion based on at least a lanthanide compound and a complexing agent a process for its preparation and use thereof
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