In this study, coumarin was obtained from guaco leaves extracts by supercritical extraction under different experimental conditions according to a central composite rotational design (CCRD) with two independent variables, temperature (T) and pressure (P).
The representative samples (5.0 g each) were extracted using the acetate buffered extraction under the optimized conditions and were analyzed using HPLC system of the reported methods.
Similar stability was also observed by Andujar-Ortiz et al. (2010), whereby aqueous extracts of IYDs obtained through pressurized liquid extraction under a harsher temperature condition exhibited a growth-stimulating effect on wine LAB.
Oil was extracted from the powder using supercritical fluid extraction under the following conditions: extraction time 120 min, extraction temperature 45 °C, and extraction pressure 35 MPa, CO2 was the only fluid used.
The exemplary chromatograms of methanolic extracts from the R. crispus root obtained by extraction under reflux and PLE, at methanol boiling point, are presented in Fig 1a, b, respectively.
The chromatograms in Fig. 1a, b show that the PLE extract composition is very similar to that obtained using extraction under reflux, which is the most commonly used technique of hydroxyanthraquinones extraction from plants.
Rudd told the Sunday Times last weekend that she was determined to push forward with shale and even allow extraction under national parks.
Making matters worse, Venice has sunk by 23cm over the last century, supposedly due to groundwater extraction under the Venice lagoon.
An attempt at public demonstration of dental extraction under anesthesia with nitrous oxide was made by American dentist Horace Wells in 1845.
In the film's best-observed thread, the organizer Eriel Deranger manages demonstrations, fund-raising and collaboration as she protests the Pharaonic tar-sands extraction under way in northeastern Alberta.
Various solvent blends were employed for the coal extraction under the total reflux condition.
