The chemical constituents and relative contents in the SFE-CO_2 extract and steam distillation oil were measured by GC-MS,and 40 chemical constituents were identified,39 compounds existed in the SFE-CO_2 extract,in which the anethole mass content was 78.91%;
The scavenging capacity of essential oils was studied against the DPPH(1,1-Diphenyl-2-picrylhydrazyl) radical,the result indicated that the maximum scavenging rate was 62.4% and water steam distillation could reach up to 84.2%
Substances by steam distillation and supercritical CO_2 extraction have the(common) components such as copanen,caryophyllene,eudesma-4(14),11-diene,α-muurolene,1,2,3,5,6,8a-hexahydro-4,7-dimethyl-1-(1-methylethyl)-naphthalene and 1,2,3,4,4A,5,6,8a-octahydro-8-tetramethyl-2-naphthalene-methanol.
The preparation method for essential oilβ-cyclodextrin inclusion complex was to add water10times the amount of it to medical material15times the Rx quantity,and extracted by wet distillation for4hours and then included by15gβ-cyclodex-trin.
. Conclusion The extract of radix curcumae by wet distillation not only down regulate VEGF and CoX-2 expression in gastric mocosa but also reduce the incidence ratio of gatric cancer and displays very good potentiality about cancer chemoprevetion
The results indicate that 40 kinds of ingredients in water vapor distillation extracts are identified, the chromatogram peak area of which is more than 90% in total chromatogram peak area, and most of which are volatile.
Regeneration of Spent TBP-Diluent Solvent by Steam Distillation
Regeneration of irradiated and actual spent solvent (30% TBP in a hydrocarbon diluent) by overheated steam distillation was studied in batch experiments.
Simulation of Steam Distillation of Multicomponent Mixtures of Higher Aliphatic Acids
A mathematical model of steam distillation of multicomponent mixtures of higher aliphatic acids is proposed, based on solving the equation of equilibrium states for closed systems with account of the non-ideal behavior of a solution.
Acid hydrolysis followed by steam distillation released more than 95% of the acetyl groups from the two major nucleoproteins.