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Purpose. To study the miscibility of proteins and polymer excipients in frozen solutions and freeze-dried solids as protein formulation models. Methods. Thermal profiles of frozen solutions and freeze-dried solids containing various proteins (lysozyme, ovalbumin, BSA), nonionic polymers (Ficoll, polyvinylpyrrolidone [PVP]), and salts were analyzed by differential scanning calorimetry (DSC)....
Purpose. Preparation of spherical fine protein microparticles by the lyophilization of a protein-poly(ethylene glycol) (PEG) aqueous mixture was investigated. The main objective was to establish a method for preparing protein microparticles suitable for pharmaceutical production. Methods. Aqueous solutions containing bovine serum albumin (BSA) and PEG at various mixing ratios were freeze-dried...
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