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从新鲜及热风、真空、红外和冷冻干制的龙眼(Dimocarpus longan Lour.)果肉中分别提取制备粗多糖,即新鲜龙眼多糖(fresh longan polysaccharide,FLP)、热风干制龙眼多糖(hot-air-dried longan polysaccharide,HDLP)、真空干制龙眼多糖(vacuum-dried longan polysaccharide,VDLP)、红外干制龙眼多糖(infrared-dried longan polysaccharide,IDLP)和冷冻干