title: A robust experimental design method to optimize formulations of retinol solid lipid nanoparticles.
abstract: A robust experimental design method was developed using a response surface methodology and models to facilitate the development process of retinol solid lipid nanoparticles (SLNs). The SLNs were evaluated to determine how different parameters including lipid and surfactant affect size and encapsulation efficiency. This was conducted using factorial analysis and a robust design (RD) method was used to achieve optimal formulations. Two models were developed based on the RD principle and both mean and variance of the response characteristics were estimated functionally using the least squares method. They proved useful in formulation studies aiming to develop optimum by allowing a systematic and reliable design method. A model for maximizing the overall desirability represented by the geometric mean of all objectives was found to provide a better solution. The newly designed method provides useful information to characterize significant factors and obtain optimum formulations, thereby allowing a systematic and reliable design method.
authors.affiliation: College of Pharmacy, Pusan National University, Busan 609-735, Republic of Korea.
authors.forename: Youn Jung
authors.initials: YJ
authors.lastname: Jung
authors.forename: Nguyen Khoa Viet
authors.initials: NK
authors.lastname: Truong
authors.forename: Sangmun
authors.initials: S
authors.lastname: Shin
authors.forename: Seong Hoon
authors.initials: SH
authors.lastname: Jeong
mesh_terms: D016018:Least-Squares Analysis; D008055:Lipids / Q000737:chemistry*; D053758:Nanoparticles; D010316:Particle Size; D014801:Vitamin A / Q000737:chemistry*
chemical_list: D008055:Lipids; D014801:Vitamin A