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Panasonic of Osaka, Japan, has received US Patent No. 7,833,701, "Biomolecule substrate, and test and diagnosis methods and apparatuses using the same." The patent claims a method for fabricating a biomolecule substrate, where biomolecule microcapsules are prepared by producing from a main solution an emulsion containing medium and micro-emulsion particles. A polymer thin film is then produced by interfacial polycondensation at an interface between the micro-emulsion particles and the medium so that the micro-emulsion particles become covered with the polymer thin film.

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