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Piteguo fruit (PTG) picked from the trees growing at a high altitude of 2100–2400m in Gansu Province, China, is rich in a variety of nutrients, especially the polysaccharide. The optimum conditions for ultrasonic-assisted extraction Piteguo polysaccharide (PTGP) were investigated by response surface methodology (RSM), including ratio of water to raw material, extraction time, extraction temperature...
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