title: [Effect of dragon's blood powder with different grain size on transdermal absorption and adhesion of ZJHX paste].
abstract: OBJECTIVE
  To study the effect of dragon's blood powder with different grain size on the transdermal permeability and adhesion of ZJHX paste.
  
  
  METHODS
  Dragon's blood powder with grain sizes of 4, 19, 55 microm were got by ultrafine grinding technology, and then prepared into rubber pastes A, B, C and D, together with dragon's blood powder with grain size of 93 microm of original description. Franz diffusion cell method was adopted to compare the difference in transdermal permeability of dragon's blood powder with different grain sizes, with dracorhodin as the index, and compared their effect on the adhesion of pastes with initial adhesion, permanent adhesion and peel strength as the indexes.
  
  
  RESULTS
  Q(s)-t equations of pastes A, B, C, D were as follows: Q(s)=1.369 6t + 3.985 5, Q(s) = 1.262 8t +3.738 1, Q(s) = 1.192 3t + 3.320 6, Q(s) = 1.152 2t + 2.366 1, respectively, which showed that the adhesion of A was the best good.
  
  
  CONCLUSIONS
  With the decrease in the grain size of dragon's blood powder, accumulative penetration of dracorhodin increases, which facilitates transdermal permeability and adhesion.
authors.affiliation: Jiangsu University, Zhenjiang 212013, China. huqingo@163.com
authors.forename: Qin
authors.initials: Q
authors.lastname: Hu
authors.forename: E
authors.initials: E
authors.lastname: Sun
authors.forename: Zhen-Hai
authors.initials: ZH
authors.lastname: Zhang
authors.forename: Jing
authors.initials: J
authors.lastname: Zhu
authors.forename: Xiao-Bin
authors.initials: XB
authors.lastname: Jia
mesh_terms: D000042:Absorption; D000818:Animals; D029802:Croton / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000493:pharmacokinetics*; D051379:Mice; D010316:Particle Size; D010936:Plant Extracts / Q000737:chemistry / Q000493:pharmacokinetics*; D012116:Resins, Plant / Q000737:chemistry / Q000493:pharmacokinetics; D012867:Skin / Q000378:metabolism*; D012869:Skin Absorption
chemical_list: D004365:Drugs, Chinese Herbal; D010936:Plant Extracts; D012116:Resins, Plant; C525191:dragon's blood