FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2798076094> ?p ?o ?g. }

• W2798076094 abstract "The objective of this doctoral dissertation was to develop different analytical approaches for the extraction, separation, identification and quantitative determination of various phenolic compounds from different plants and their products. This dissertation is divided into the following four major segments, which, to some extent, can stand alone, but when it comes to the research, they are mutually very related:- Segment 1: Short-term (up to 24 h) and long-term (up to 1 month) stability studies of trans-caffeic acid (trans-CA) and trans-ferulic acid (trans-FA) dissolved in two organic solvents (methanol and tetrahydrofuran) and exposed to a range of storage conditions (temperature, organic solvents used, influence of daylight and UV irradiation) were performed for the first time. Gas chromatography with mass spectrometry (GC-MS) was used to study the degradation of the samples and structural identification of the degradation products.- Segment 2: The research within this segment focused on the optimization of a simple, fast and quantitative extraction method for the isolation of phenolic acids (PAs) from Slovenian red wine samples. Different extraction techniques were tested, and solid phase extraction (SPE) using HLB cartridges was selected as the optimal technique. For the identification and quantification of extracted analytes, the GC-MS method was optimized and validated. Different statistical and chemometrical tools were applied, and the wines were classified according to the Slovenian wine-growing regions and vine varieties.- Segment 3: The main goal within this research segment was the development of an ultrasound-assisted extraction (UAE) method for the isolation of different polyphenol classes from coriander fruits. Additionally, for the isolation of total PAs (free and bound), two analytical steps were applied: UAE alkaline hydrolysis and clean-up using SPE HLB cartridges. The response surface methodology (RSM) combined with a Box-Behnken experimental design (BBD) were used for the optimization of the alkaline hydrolysis and for increasing the extraction yields of the PAs. In this way, most influencing factors (temperature, sonication time and NaOH concentration) were studied as independent variables. Extracted PAs were determined using the previously optimized GC-MS method. - Segment 4: The main goal of this segment of the dissertation was to show the application of deep eutectic solvents (DESs) as a ‘green’ alternative to the conventional organic solvents for the isolation of phenolic compounds from plants such as Aronia melanocarpa (dried chokeberry) and Olea europaea (olive leaves). Different extraction techniques and instrumental methods were applied for the determination of phenolic profiles. Phenols from chokeberries were obtained through UAE. Furthermore, for the simultaneous identification and quantitative determination of 21 different phenolic compounds from Aronia melanocarpa, the HPLC-UV method was optimized and validated. On the other hand, microwave-assisted extraction (MAE) was used to improve the extraction yields of phenolic compounds from olive leave samples, which were subsequently determined by using validated HPLC-DAD-ESI-TOF-MS method." @default.
• W2798076094 created "2018-04-24" @default.
• W2798076094 creator A5082115157 @default.
• W2798076094 date "2018-01-01" @default.
• W2798076094 modified "2023-09-23" @default.
• W2798076094 title "Development of analytical methods for simultaneous identification and determination of phenolic compounds" @default.
• W2798076094 hasPublicationYear "2018" @default.
• W2798076094 type Work @default.
• W2798076094 sameAs 2798076094 @default.
• W2798076094 citedByCount "0" @default.
• W2798076094 crossrefType "dissertation" @default.
• W2798076094 hasAuthorship W2798076094A5082115157 @default.
• W2798076094 hasConcept C123460561 @default.
• W2798076094 hasConcept C162356407 @default.
• W2798076094 hasConcept C178790620 @default.
• W2798076094 hasConcept C185592680 @default.
• W2798076094 hasConcept C205345274 @default.
• W2798076094 hasConcept C2778004101 @default.
• W2798076094 hasConcept C2778224086 @default.
• W2798076094 hasConcept C2780213334 @default.
• W2798076094 hasConcept C31903555 @default.
• W2798076094 hasConcept C43617362 @default.
• W2798076094 hasConcept C4725764 @default.
• W2798076094 hasConcept C55952523 @default.
• W2798076094 hasConcept C81426234 @default.
• W2798076094 hasConceptScore W2798076094C123460561 @default.
• W2798076094 hasConceptScore W2798076094C162356407 @default.
• W2798076094 hasConceptScore W2798076094C178790620 @default.
• W2798076094 hasConceptScore W2798076094C185592680 @default.
• W2798076094 hasConceptScore W2798076094C205345274 @default.
• W2798076094 hasConceptScore W2798076094C2778004101 @default.
• W2798076094 hasConceptScore W2798076094C2778224086 @default.
• W2798076094 hasConceptScore W2798076094C2780213334 @default.
• W2798076094 hasConceptScore W2798076094C31903555 @default.
• W2798076094 hasConceptScore W2798076094C43617362 @default.
• W2798076094 hasConceptScore W2798076094C4725764 @default.
• W2798076094 hasConceptScore W2798076094C55952523 @default.
• W2798076094 hasConceptScore W2798076094C81426234 @default.
• W2798076094 hasLocation W27980760941 @default.
• W2798076094 hasOpenAccess W2798076094 @default.
• W2798076094 hasPrimaryLocation W27980760941 @default.
• W2798076094 hasRelatedWork W1947698786 @default.
• W2798076094 hasRelatedWork W2022448133 @default.
• W2798076094 hasRelatedWork W2028142203 @default.
• W2798076094 hasRelatedWork W2087969824 @default.
• W2798076094 hasRelatedWork W2186821229 @default.
• W2798076094 hasRelatedWork W2380886970 @default.
• W2798076094 hasRelatedWork W2500274479 @default.
• W2798076094 hasRelatedWork W2782670612 @default.
• W2798076094 hasRelatedWork W2789366117 @default.
• W2798076094 hasRelatedWork W2793864765 @default.
• W2798076094 hasRelatedWork W2794014852 @default.
• W2798076094 hasRelatedWork W2795787962 @default.
• W2798076094 hasRelatedWork W2801157829 @default.
• W2798076094 hasRelatedWork W2883438186 @default.
• W2798076094 hasRelatedWork W2955186894 @default.
• W2798076094 hasRelatedWork W3007207927 @default.
• W2798076094 hasRelatedWork W3042698891 @default.
• W2798076094 hasRelatedWork W3135462573 @default.
• W2798076094 hasRelatedWork W3158410177 @default.
• W2798076094 hasRelatedWork W3164817912 @default.
• W2798076094 isParatext "false" @default.
• W2798076094 isRetracted "false" @default.
• W2798076094 magId "2798076094" @default.
• W2798076094 workType "dissertation" @default.