Sodium chloride Stabilizer 4 4

Sodium chloride Stabilizer 4 4 4 cosmetics had 1,6526 mg GAE/ml. The TPC in the cosmetic product
Glycerine Propylene glycol Centrifugation assay Humectant Humectant 5 e Homogeneous 5 e e 5 Homogeneous Homogeneous was passed through 6 cycles of heating and cooling and was reduced to 1,1546 mg GAE/ml that in the acceptable range for cos-metic application.
Overall 38.75% 39.25% 38.50%
3.7. Compatibility and stability in cosmetic base Silicone base emulsions containing either glycerine or propyl-ene glycol were formulated based on the solubility and stability of the extract. The ingredients were varied to produce a physically stable emulsion that was preliminarily evaluated by the cen-trifugation assay (Table 4). Three stable bases were included for the preference test. Base formula 2 gained the highest preference in terms of spreadability, texture, color, smoothness, adsorption, softness, moisturizing and odor during and after use (Churienthong et al., 2010). Therefore, this base was selected for the development of rice husk cosmetics. The rice husk extract from 120 min of reflux was incorporated in the preservative-free base (50 mg/ml). The extract was compatible with the base and remained stable fol-lowing accelerated stability tests, as shown in Table 5. Although the pH of the formulation was slightly shifted, it was in the acceptable range for cosmetic formulations; this pH shift may have been because no preservatives were added to the formulation. Fur-thermore, the sun protection efficacy of the developed formulation was better than the silicone base. Although UVB protection was minimal due to the decreased SPF, UVA protection efficacy was better (Table 6). The increased UVA/UVB ratio is in agreement with the boot star rating and was confirmed by the wider range of critical wavelengths of the rice husk cosmetics. The protection ef-ficacy was reduced in terms of the UVA/UVB ratio following the accelerated stability test. However, the range of critical wave-lengths and boot star rating displayed high protection. In addition, the chemical stability of the TPC was determined based on its contribution to antioxidant activity and is related with the fatty acid content, as described above. Freshly prepared rice husk preference 4. Conclusions This research offers an ecological treatment of rice husks, which is the principle agricultural waste product in Thailand. The envi-ronmental impact of this waste will be directly suppressed. Transformation of rice husks into a safe and natural raw material available for pharmaceutical and cosmetic applications, based on the present biological activities, is presented. Importation of raw materials for pharmaceutical and cosmetic industries will be reduced because the domestic supply is adequate. The econom-ically advantageous alternatives for exploiting biologically active compounds from agricultural waste will provide the local in-dustries and impoverished population with a low-cost ecological compound. In addition, the further development of cosmetics containing rice husks is encouraged, including stability enhance-ments and clinical efficacy evaluation of this ecological cosmetic product