title: [Effect of freeze-thaw on clarify performance of extracting solution with silkworm dropping].
abstract: OBJECTIVE
  The approach of this paper is make extracting solution' clarity achieve the request level and reduce the pollution of resinic columns through improved technical procedure. Silkworm dropping have sediment with alcohol extract and acid precipitation, affect the clarify performance quality, and polysaccharide and protein in extracting solution is badly for resinic columns in purification process.
  
  
  METHODS
  Added freeze-thaw pretreatment in clarified process and researched three thaw methods effect on clarify performance of extracting solution with silkworm dropping. The adding effects were evaluated by content of polysaccharide and protein, transmittance and the yield of active ingredients during this adding process.
  
  
  RESULTS
  Through comparing researches of three thaw methods, the microwave thaw method was the best approach.
  
  
  CONCLUSIONS
  Adding freeze-thaw pretreatment in clarify process is not only can improve the clarity of extracting solution with silkworm dropping on ideal level, reduce pollution of resinic columns, but also remain ideally the active ingredients.
authors: School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, China. wtan@tju.edu.cn
authors: Wei
authors: W
authors: Tan
authors: Lu
authors: L
authors: Wang
authors: Yanxia
authors: Y
authors: Su
authors: Xin
authors: X
authors: Wang
authors: Wanda
authors: W
authors: Nie
authors: Xiaodan
authors: X
authors: Zhu
mesh_terms: D000818:Animals; D001685:Biological Factors / Q000302:isolation & purification*; D012831:Bombyx / Q000737:chemistry*; D005591:Chemical Fractionation / Q000295:instrumentation / Q000379:methods*; D005243:Feces / Q000737:chemistry*; D005615:Freezing
chemical_list: D001685:Biological Factors