Retinol의 역할
Retinol Retinal Retinoic acid
Retinoic acid - 피부의 photoaging(광노화)를 치료
fine lines(잔주름) & wrinkles 제거
Keratinocyte 증식 shedding of corneocytes(각질세포)
진피 내에서 새로운 collagen 생성
-> improve the appearance ofskin
Objective
-to assess the efficacy of a newly synthesized photostable retinol derivative
Method
-29 Korean women
-retinol derivative twice daily
on the left of the face and a placebo on the right
-
-visiometer (SV 600, Germany)
Role of Retinoic acid receptor
Nucleic receptor – gene expression
cellular proliferation and differentiation
Prevent matrix c
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of M2O3
O atom is an array of ABAB form as the hexagonal
Al atom 2/3 packing the layers of the O atoms coordinated 6
Al2O3
- Maintain appearance of the initial particles so It has not been densified by sintering means
- Sintered specimen of 1650℃ is more density than 1400℃ beacause of crevice and the pores that were distributed in less (not much difference)
- Particle si