About: Supercritical Fluid Fractionation for Enhancement of Insecticidal Activity of Eucalyptus Extract

Facets (new session)
Description
Metadata
Settings
- owl:sameAs
- Inference Rule:

About: Supercritical Fluid Fractionation for Enhancement of Insecticidal Activity of Eucalyptus Extract Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The objective of this work was to optimize the pressure of supercritical CO2 extraction (40 °C, 9-30 MPa) of eucalyptus leaves to reach maximal insecticidal activity of extract. Several methods of extract fractionation were applied to increase the concentration of volatiles in extract. Firstly, a time fractionation with gradually increased solvent density was carried out using one separator. In addition, the SFE combined with extract fractionation in two separators and fractionation with use of appropriate sorbent was applied. The efficiency of SFE in terms of volatile fraction composition, yield and insecticidal activity was compared with hydrodistillation. The composition of volatiles in the isolates was determined by GC-MS and GC-FID. The insecticidal activity of isolates was measured on larvae of Spodoptera litoralis in terms of antifeedancy (ED50), acute and chronic toxicity (LD50). Yield, composition and insecticidal activity of extracts were strongly influenced by the experimental conditions. The efficiency of CO2 extracts was comparable with that of hydrodistillate. However, the chronical toxicity (LD50 = 8 µg) of the extract obtained at 40°C and 30 MPa was almost two times higher than that of the hydrodistillate. The objective of this work was to optimize the pressure of supercritical CO2 extraction (40 °C, 9-30 MPa) of eucalyptus leaves to reach maximal insecticidal activity of extract. Several methods of extract fractionation were applied to increase the concentration of volatiles in extract. Firstly, a time fractionation with gradually increased solvent density was carried out using one separator. In addition, the SFE combined with extract fractionation in two separators and fractionation with use of appropriate sorbent was applied. The efficiency of SFE in terms of volatile fraction composition, yield and insecticidal activity was compared with hydrodistillation. The composition of volatiles in the isolates was determined by GC-MS and GC-FID. The insecticidal activity of isolates was measured on larvae of Spodoptera litoralis in terms of antifeedancy (ED50), acute and chronic toxicity (LD50). Yield, composition and insecticidal activity of extracts were strongly influenced by the experimental conditions. The efficiency of CO2 extracts was comparable with that of hydrodistillate. However, the chronical toxicity (LD50 = 8 µg) of the extract obtained at 40°C and 30 MPa was almost two times higher than that of the hydrodistillate. (en)
Title	Supercritical Fluid Fractionation for Enhancement of Insecticidal Activity of Eucalyptus Extract Supercritical Fluid Fractionation for Enhancement of Insecticidal Activity of Eucalyptus Extract (en)
skos:prefLabel	Supercritical Fluid Fractionation for Enhancement of Insecticidal Activity of Eucalyptus Extract Supercritical Fluid Fractionation for Enhancement of Insecticidal Activity of Eucalyptus Extract (en)
skos:notation	RIV/67985858:_____/13:00394562!RIV14-TA0-67985858
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(TA01010578)
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Topiař, Martin Maixnerová, Lucie Sajfrtová, Marie
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav chemických procesů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	109001
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/13:00394562
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	supercritical CO2 extraction; extract fractionation; eucalyptus (en)
http://linked.open.../riv/klicoveSlovo	extract fractionation supercritical CO2 extraction eucalyptus
http://linked.open...ontrolniKodProRIV	[F662274A2027]
http://linked.open...v/mistoKonaniAkce	Napoli
http://linked.open...i/riv/mistoVydani	Salerno
http://linked.open...i/riv/nazevZdroje	Proceedings
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Research and development of new products for complex protection of plants based on natural substances obtained using supercritical fluid extraction and hydrodistillation
http://linked.open...UplatneniVysledku	2013
http://linked.open...iv/tvurceVysledku	Sajfrtová, Marie Maixnerová, Lucie Pavela, R. Topiař, Martin
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2013-05-29 (xsd:date)
number of pages	8 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Centro Stampa di Ateneo
https://schema.org/isbn	88-7897-061-1

Faceted Search & Find service v1.16.118 as of Jun 21 2024

Alternative Linked Data Documents: ODE Content Formats:

RDF

ODATA

Microdata

About

OpenLink Virtuoso version 07.20.3240 as of Jun 21 2024, on Linux (x86_64-pc-linux-gnu), Single-Server Edition (126 GB total memory, 37 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software