五月天成人综合社区一区|中文字幕第一综合|日本a级片中文字幕|黄色大片免费在线|永久AV网址在线观看|成人性爱大片、|欧美A级黄色A片|欧美在线播放麻豆下载

  • reback
  • Filtration agent PVPP

    Release time:2022-02-18 11:24    Views
    Product Name:Filtration agent PVPP
    Product Introduction:A crosslinked polyvinylpyrrolidone, through the active chain and microporous state, is combined with polyphenols in the form of hydrogen bond. Because PVPP is completely insoluble in water, it is completely removed during filtration, thus achieving the purpose of selective removal of polyphenols and preventing the cross-linking of polyphenols with proteins.