Comparison of the Contents of Total Polyphenols and Tannins in Different Parts of Pinus sinensis Contents of Total Polyphenols and Flavonoids from Alpine Plants from Qilianshan Mountains and Their Antioxidant Activity Study on Factors Influencing Total Polyphenol Content in Citrus Embryogenic Calli Dynamic Changes of Polyphenols and Their Relationship with Antioxidant Capacity in the Muscat Hamburg Grapevine Accumulation Patterns of Total Flavonoids,Total Polyphenol during Growth of Zanthoxylum bungeanum Maxim.and Its Antioxidant Activities Dynamic Changes of Polyphenols and Their Relationship with Antioxidant Capacity in the Muscat Hamburg Grapevine