Formulation and Evaluation of O/W emultions containingsd Arabinoxylans from rice barn residues

Abstract

In this study arabinoxylans was extracted from rice bran by warm water. The chemical structures were characterized by Fourier Transform-Infrared Resonance (FT-IR) and Nuclear Magnetic Resonance (NMR) Spectroscopy. The o/w emulsions containing arabinoxylans were formulated by varying the ratios of emulsifying agent, Brij 72 to Brij 721 of 1:4, 2:3, 1:1, 3:2 and 4:1. The in vivo efficacies were evaluated in 30 healthy female volunteers whose age in range 30-55 years using single blind trials for moisturizer, elasticity and wrinkle determination. The yield of extracted arabinoxylans was 0.29 %w/w. The selected o/w emulsions containing arabinoxylans consisted of 1% w/w of arabinoxylans and the ratio of Brij 72 to Brij 721 was 3:2, which gave the most satisfactory with physical appearances and the skin feeling and spread ability. Moreover, the o/w emulsions containing arabinoxylans was stable and passed 6 heating-cooling cycles. In vivo efficacies of o/w emulsion containing arabinoxylans were evaluated for moisture content and elasticity using Skin Diagnostic SD 27 and DermaLab® Elasticity probe instrument, respectively. These efficacy evaluations on the face (cheek and forehead) were investigated for 8 weeks. They show that the product increased the moisturizing property, reduced young’s modulus which resulted in increasing skin elasticity with significant difference in 1-8 weeks. The results were also observed by macroscopic photographs that show the reduction of wrinkle line on forehead. It is suggested that arabinoxylans extract may be a candidate for an efficient moisturizing agent.