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Rhodamine was taken to the chitosan solutions and then the mixture solution was shaking for 4-10 h to obtain rhodamine labeled chitosan particles. CSPE prepared by rhodamine labeled chitosan particles and liquid paraffin. (A) Microscopic image and corresponding fluorescence image of CSPE. FITC-BSA was served as model antigen and was mixed with CSPE on ice for 4h. (B) Microscopic image and corresponding fluorescence image of CSPE.
