Search results for "Solvent-free microwave extraction"

showing 2 items of 2 documents

Solvent-free microwave-assisted extraction of polyphenols from olive tree leaves: Antioxidant and antimicrobial properties

2017

International audience; Response surface methodology (RSM) and artificial neural networks (ANN) were evaluated and compared in order to decide which method was the most appropriate to predict and optimize total phenolic content (TPC) and oleuropein yields in olive tree leaf (Olea europaea) extracts, obtained after solvent-free microwave- assisted extraction (SFMAE). The SFMAE processing conditions were: microwave irradiation power 250-350 W, extraction time 2-3 min, and the amount of sample 5-10 g. Furthermore, the antioxidant and antimicrobial activities of the olive leaf extracts, obtained under optimal extraction conditions, were assessed by several in vitro assays. ANN had better predic…

Antioxidantmedicine.medical_treatment[SDV]Life Sciences [q-bio]Pharmaceutical ScienceAntioxidantsAnalytical Chemistrychemistry.chemical_compoundDrug Discovery[SDV.IDA]Life Sciences [q-bio]/Food engineeringAntimicrobial; Antioxidant; Oleuropein; Olive leaves; Optimization; Solvent-free microwave extraction; Organic ChemistryOlive leavesMicrowaves04 agricultural and veterinary sciences040401 food scienceAnti-Bacterial AgentsChemistry (miscellaneous)Molecular MedicineAntioxidantAntibacterial activityOptimizationStaphylococcus aureusMicrobial Sensitivity TestsArticlelcsh:QD241-4410404 agricultural biotechnologyOlive leaflcsh:Organic chemistryOleuropeinOleaStaphylococcus epidermidismedicine[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process EngineeringResponse surface methodologyPhysical and Theoretical ChemistryOleuropeinolive leaves; solvent-free microwave extraction; oleuropein; antioxidant; antimicrobial; optimizationChromatographyPlant ExtractsExtraction (chemistry)Organic ChemistryPolyphenolsolive leaves;solvent-free microwave extraction;oleuropein;antioxidant;antimicrobial;optimizationPlant LeaveschemistryPolyphenolYield (chemistry)Solvent-free microwave extractionSolventsAntimicrobialNeural Networks Computer
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Effects of solvent-free microwave extraction on the chemical composition of essential oil of Calamintha nepeta (L.) Savi compared with the convention…

2008

The essential oil of Calamintha nepeta has been obtained by solvent-free microwave extraction (SFME) and by classical hydrodistillation (HD). A comparative qualitative-quantitative study on the composition of the oils was carried out. A total of 38 compounds, constituting 97.6% of the oil, were identified in the oil obtained by SFME, whereas 46 compounds, representing 95.4% of the oil, were characterized in the HD oil. SFME-distilled oil is richer in lightly oxygenated monoterpenes (LOM) than HD oil. It also has a higher amount of sesquiterpenes and a lower quantity of hydrocarbon monoterpenes. HD oil seems to be affected by chemical changes more than SFME oil.

chemistry.chemical_classificationLamiaceaeChromatographybiologyPlant ExtractsExtraction (chemistry)TemperatureFiltration and SeparationSettore CHIM/06 - Chimica Organicabiology.organism_classificationCalamintha nepeta essential oil hydrodistillation solvent-free microwave extractionCalaminthaAnalytical Chemistrylaw.inventionSteam distillationHydrocarbonchemistrylawNepetaOils VolatileSolventsLamiaceaeMicrowavesChemical compositionEssential oil
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