Study on supercritical CO2 extraction of salidroside and P-tyrosol in Rhodiola sachalinensis Comparative Analysis of Essential Oil Quality and Composition from Tissue Culture Seedlings of Thymus vulgaris L. Using Different Extraction Methods Study on Extraction of Active Ingredient of Turmeric by Supercritical CO2 and Microwave Combined Technique Oil Extract from Passionflower Seed by Supercritical CO2 and It,s Composition Analysis