title: [Numerical taxonomy of corlor in Phellodendron Cortex].
abstract: Through the investigation of Phellodendron Cortex on the market, and 28 batches of samples were collected. By using spectrophotometer the color values of outer surface, inner surface and cross - section of these samples were measured. These measured color data was translated into 3D structure diagram by using the Lab color space tool. The level difference value, the mean value and the threshold value were calculated based the measured color data of these different batches of samples. All 28 groups measured data was analyzed using the methods of Ward linkage and average Euclidean distance. At the same time, we invited Professor Jin Shiyuan, the "Chinese medicine master", to identify, quality-evaluate and grade these 28 batches of Phellodendron Cortex samples base on the traditional experience, then compared the traditional empirical results with the spectrophotometer measurement results. The result showed that, the Phellodendron Cortex could be divided into Phellodendri Amurensis Cortex and Phellodendri Chinensis Cortex by color numerical clustering, and classified according to quality. The classification result has a high degree of consistency with the traditional experience.
authors.forename: Yan
authors.initials: Y
authors.lastname: Jin
authors.forename: Lu-qi
authors.initials: LQ
authors.lastname: Huang
authors.forename: Yuan
authors.initials: Y
authors.lastname: Yuan
authors.forename: Shan-shan
authors.initials: SS
authors.lastname: Zhang
authors.forename: Shi-yuan
authors.initials: SY
authors.lastname: Jin
mesh_terms: D002681:China; D003116:Color; D029001:Herbal Medicine / Q000191:economics; D032102:Phellodendron / Q000737:chemistry* / Q000145:classification*; D010946:Plants, Medicinal / Q000737:chemistry / Q000145:classification; D011786:Quality Control; D013053:Spectrophotometry