The essential oil of Citrus grandis' leaf is extracted by the microwave method. The results show that the best condition of extracting is that dry-leaves of 50g is used is at 360W×40% with n-hexane for 50s,and it obtains the 1.03% of essential oil.
It was discussed that the effects of extracting pressure, temperature and time on the extraction efficiencies of the camellia oil by supercritical CO2.The optimal extracting conditions are determined: extracting pressure 25MPa, the temperature 40℃ and the time 2.5 hours. The extraction efficiencies of camellia oils was up to 97.5%.
The up-sizing technology of supercritical CO2 extraction of grape seed oil was studied in this paper. The optimizing technical parameters are: extracting pressure at 25 MPa,extracting temperature at 45℃,CO2 flow rate at 40 kg/h. the extraction yield is 8.92%,which is less than the result of lab.
It draws the conclusion: the smash rate 30 iterm、extraction press 30MPa、extraction temperature 40℃、extraction time 2h,though the experiment of supercritical carbon dioxide liquid extracting safflower oil.
The study indicated that the recovery rate is best when we using 40% ethanol (94.5% v/v) to soak garlic pellet for 2 hours,and then extract the soak juice with supercritical CO_2 extraction under 35℃temperature,15 MPa pressure and 8kg·h~(-1) rate of flow of CO_2,and the content of allicin is 60.54%.
This paper provides a novel way for extracting the new sorting feature of radar signals.
A novel scheme for extracting the global scattering center model of radar targets is proposed in this paper.
We then present the arithmetic for dynamic automatic identification of standing tree limbs, extracting basic growth characteristics of the standing trees such as the form, size, degree of bending and their relative spatial position.
Wavelet design for extracting weak fault feature based on lifting scheme
Simulation and engineering results confirm that the proposed method is better than other wavelet methods for extracting weak fault feature.
Solvent extraction-atomic absorption determination of chromium(VI) in soils
Other techniques for solving the above problem, namely, an increase in the temperature of the test solution temperature or the use of solvent extraction, bioaccumulation, and unusual analytical procedures are also considered.
A procedure was developed for determining germanium as a Rhodamine 6G-8-molybdogermanic heteropoly acid ion-pair complex in solutions obtained after germanium separation by solvent extraction from the matrix of various Ge-containing samples.
The procedure accuracy was evaluated by determining germanium in a reference standard sample of steel after preliminary separation by solvent extraction.
Solvent extraction with dithiophosphoric acids was proposed for the separation of selenium from the interferents.