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National Repository of Grey Literature

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Extraction Kinetics and Insecticidal Activity of Volatile Components Isolatedfrom rue by Supercritical CO2. Sajfrtová, Marie ; Karban, Jindřich ; Sovová, Helena ; Pavela, R. The aim of the work was to describe the SFE of volatile components from rue and to analyse their insecticidal effects. The objectives consisted in: (a) optimizing the SFE condition (pressure, temperature, extraction time, use of additional separator and concentration of modifier in CO2),investigating their effect on the yield, concentration volatiles in extract and the insecticidal activity, determination of the SFE kinetics of major components in the rue extracts and comparing the SFE with hydrodistillation and maceration. Fulltext: content.csg - PDF Plný tet: SKMBT_C22014090110391 - PDF Detailed record

Effect of Conditions of Supercritical Fluid Extraction on Insecticidal Activity of Isolates from Rue Sajfrtová, Marie ; Pavela, R. ; Karban, Jindřich The aim of this study was to find optimal operating conditions of SFE from rue to obtain extract with maximal insecticidal activity. Several types of extracts were prepared using the benefit of variable solvent power of supercritical carbon dioxide. The extracts rich in volatile oil or oleoresin were obtained at 40 °C and 12 or 28 MPa, respectively. The extract enriched with polar components was extracted at pressure of 28 MPa and temperature of 40 °C with acetone added to CO2 as modifier (2.5 – 10 wt. %). Fulltext: PDF Detailed record

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