- Whereitisnecessarytomakeaxenicorpyrogenexperiment,animalculelimitinspectiononacrudedrug,oritisnecessarytovaccumizeandfillinnitrogengasforacrudedrug,Chitosanisabundantandbiodegradableinthenatureanditisareproduceibleresourceandenvironmentalfriendlymate...
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