PRELIMINARY STUDY OF “NERO D'AVOLA” CULTIVAR FROM MUST TO WINE BY SPME-GC/MS ANALYSIS

Preliminary results of a GC-MS analysis on some embalming materials from a female mummy from ptolemaic age.

Fruit physical, chemical and aromatic attributes of early, intermediate and late apricot cultivars.

BACKGROUND: In order to reach good fruit quality, apricots require a balance of sugars and acids as well as a strong apricot aroma. In this study, fruit quality of early, intermediate and late apricot cultivars was evaluated by measuring physical, chemical and olfactory attributes. Multivariate analysis of quality and aroma attributes was used to identify groups of similar cultivars and association with ripening season. RESULTS: Physical, chemical and aromatic attributes showed great variation amongcultivars but no relation to ripening season. Aromatic profiles (34 volatiles) of fruit tissues indicated qualitative and quantitative differences among cultivars. Ninfa and Mandorlon were riches…

Benzyl ions from 1,1-(2,2′-dimethoxyphenyl)-substituted 2-methylpropanes under electron ionization

The electron ionization (EI)-induced fragmentations of a series of 1,1-(2,2'-dimethoxyphenyl)-substituted 2-methylpropanes (1-20) in both 70 eV and mass-analyzed ion kinetic energy (MIKE) spectra have been investigated. The EI-MS spectra of these compounds are characterized by the presence of abundant benzyl ions. These ions result from competitive hydrogen migration from the 2- and 2'-methoxy groups on the carbenium center of the diphenylmethyl cations formed by benzylic cleavage of the molecular ions. The relative abundances of the benzyl ions arising from such competitive processes are discussed and rationalized. The steric effect of the 3- or 3'-substituents is the main discriminating f…

Composition and volatile aromatic fraction of "fine amber" Marsala wines

Comparison of aroma compounds from six ancient sicilian apple cultivars

Physicochemical Investigation of the Solubilization of Ytterbium Nitrate in AOT Reverse Micelles and Liquid Crystals

A wide investigation of the solubilization of the water-soluble salt Yb(NO3)(3) in sodium bis(2-ethylhexyl)sulfosuccinate (AOT) reverse micelles and AOT liquid crystals has been carried out. After saturation of water/AOT/organic solvent w/o microemulsions with pure Yb(NO3)(3), the Yb(NO3)(3)/AOT composites were prepared by complete evaporation under vacuum of the volatile components (water and organic solvent) of the salt-containing microemulsions. It was observed that these composites can be totally dissolved in pure n-heptane or CCl4, allowing the solubilization of a noticeable amount of Yb(NO3)(3) in quite dry apolar media. By UV-vis-NIR, FT-IR, and H-1 NMR spectroscopies, some informati…

Ceremonial customs of Greek age (5th Century, bC) in Sicily: a study by GC-MS of some fictile unguentaria from two necropolises

Effetto del PRD (Partial Rootzone Drying)sulla composizione della frazione volatile di mele ‘Pink Lady’

Fruit quality and volatile fraction of ‘Pink Lady’ apple trees in response to rootstock vigor and partial rootzone drying

BACKGROUND: Partial rootzone drying (PRD) is a novel deficit irrigation technique consisting in the alternated wetting of only one side of the rootzone, which induces partial stomatal closure and increased water use efficiency. The effect of PRD and rootstock vigor on ‘Pink Lady’ apple fruit quality and aroma profile was studied using solid-phase micro-extraction in headspace and gas chromatography/mass spectrometry. RESULTS: PRD irrigation generally did not affect quality attributes, whereas it influenced the aroma of the apple fruit. In particular, PRD improved the aroma of the fruit flesh, while it decreased the volatile fraction in the peel, where most of the compounds are concentrated.…

STUDY OF VOLATILE COMPONENTS OF TEN VARIETIES OF SALVIA BY SPME-GC/MS AND GENERAL DISCRIMINANT ANALYSIS

Characterization of isomeric organic cations by Esi/MS: 3-alkyl-5-(4-N-methylpyridinium)-1,2,4-oxadiazole cations, 5-alkyl-3-(4-N-methylpyridinium)-1,2,4-oxadiazole cations and 3-perfluoroakyl-5-(4-N-methylpyridinium)-1,2,4-oxadiazole cations, 5-perfluoroakyl-3-(4-N-methylpyridinium)-1,2,4-oxadiazole cations

VOCS DETERMINATION IN GROUND WATERS BY SPME/GC-MS

Localization and interactions of melatonin in dry cholesterol/lecithin mixed reversed micelles used as cell membrane models

The state of melatonin confined in dry cholesterol/lecithin mixed reversed micelles dispersed in CCl4 was investigated using 1H-NMR and FT-IR spectroscopies as a function of the melatonin to lecithin molar ratio (R(MLT)) and of the cholesterol to lecithin molar ratio (R(CHL)). An analysis of experimental results leads to the hypothesis that, independent of R(MLT) and as a consequence of anisotropic melatonin/lecithin, melatonin/cholesterol and cholesterol/lecithin interactions, melatonin is totally solubilized in reversed micelles. Melatonin is mainly located in and oriented in the nanodomain constituted by the hydrophilic groups of cholesterol and lecithin. A competition of melatonin and c…

Inclusion complexes of cyclomaltooligosaccharides (cyclodextrins) with melatonin in solid phase

Fourier transform infrared spectrometry (FT-IR) and X-Ray diffraction (XRD) investigations were carried out on MLT plus α-, β- and γ-CD physical mixtures and lyophilized or crystalline MLT/α-, β-, γ-CD complexes. Inclusion complexes formation between MLT and cyclodextrins in solid phase has been emphasized by the significant differences between IR and XRD spectra of physical mixtures with respect to those of the complexes. The structure of MLT CDs complexes in the solid state as well as the biochemical and pharmaceutical implications are discussed.

DRY LECITHIN REVERSED MICELLES AS BIOMEMBRANE MODELS:INTERACTION WITH VITAMIN E

Determination of terpene alcohols in Sicilian Muscat wines by HS-SPME-GC-MS.

Muscat is a grape family used to obtain several sweet, aromatic white dessert wines common in the Mediterranean area. Currently, three Sicilian cultivars (all classified DOC) are known: 'Moscato di Siracusa' the oldest and very rare today; 'Moscato di Noto', a modern derivative of the first and finally 'Moscato di Pantelleria', now the most common. This study concerns the volatile profile of 15 different Sicilian Muscat wines produced in different years using HS-SPME-GC-MS. In particular, four fundamental terpene alcohols (linalool, geraniol, nerol and citronellol) were considered. The principal aim was to study the evolution of aromatic compounds in wine during aging, and the information o…

Identification of organic compounds in fictile unguentaria from two Sicilian necropolis of Greek age (5th century, b.c.) by GC-MS analysis.

A study to obtain more knowledge on funeral set in Greek age, (5th Century, b.C.) was carried out on thirteen ancient unguentaria, small vessels used as containers of balms or ointments, founded in two different Sicilian necropolis: Adranon and Hymera. Every find was subjected to three extractions by increasing polarity solvents. All crude extracts, unsaponifiables and methyl esters of saponifiable fraction were analysed by GC-MS. Analysis showed difference between two groups of finds: the unguentaria from Adranon show abundant traces of lipids used in balm making, while those from Hymera resulted empty and buried for ritual purpose. Even if in the two towns, flourished in the same period, …

Interactions of α-tocopherol with biomembrane models: Binding to dry lecithin reversed micelles

Abstract The state of α-tocopherol (Vitamin E) in solutions of dry lecithin reversed micelles dispersed in an apolar medium has been investigated as a function of the Vitamin E to surfactant molar ratio (RVE) at fixed surfactant concentration by FT-IR, 1H NMR and SAXS with the aim to emphasize the role played by anisotropic intermolecular interactions and confinement effects as driving forces of its partitioning between apolar bulk solvent and polar nanodomains and of mutual Vitamin E/reversed micelle effects. It has been found that its binding strength to reversed micelles, triggered by steric and orientational constrains, is mainly regulated by specific interactions between the hydrophili…

γ-irradiation as a methods for decontaminating food: reduction/elimination of mycotoxins in raw unpeeled almond kernels (Prunus dulcis)

DOC Marsala: tecnologia, profilo analitico ed aromatico del Marsala Fine

Interaction and location of melatonin in cellular membrane models constituted by lecithin and cholesterol anhidrous reversed micellar systems

Studio comparativo quali-quantitativo sul profilo aromatico di vini D.O.C. Marsala “Fine”

Determination of terpenes alchols in Sicilian muscat wines by HS-SPME-GC-MS.

Melatonin: Structural characterization of its non-enzymatic mono-oxygenate metabolite

Oxidation of melatonin by Fenton reagents as well as with hypochlorous acid or oxoferryl hemoglobin has been investigated. Analysis of products by low resolution/mass spectra (MS), high resolution/MS, 1H-nuclear magnetic resonance (NMR), 13C-NMR, correlated spectroscopy (COSY) and heterocorrelated spectroscopy (HETCOR) 2D NMR reveals the formation of a single mono-oxygenated product under all conditions and unequivocally assigns the N-[2-(5-methoxy-2-oxo-2,3-dihydro-1H-indol-3-yl)-ethyl]-acetamide structure, which had not been previously considered.

Studio tramite SPME-GC/MS sull'influenza della tecnologia di vinificazione e di affinamento sulla frazione volatile di vini rossi siciliani della cultivar Perricone.

Indagine tramite SPME/GC-MS su tracce d'inquinanti all'interno dell'Orto Botanico di Palermo.

Evidences for the Formation of Inclusion Complexes of Cyclomaltooligosaccharides (Cyclodextrins) with Melatonin in solid Phase

Studies by SPME-GC/MS on aroma compounds of sixteen different apricot (Prunus armeniaca L.) cultivars

Mass spectrometry for cultural heritage knowledge: gas chromatographic/mass spectrometric analysis of organic remains in Neolithic potsherds

Interaction and location of melatonin in cellular membrane models constituted by lecithin and cholesterol anhydrous reversed micelles

Analysis of melatonin interaction with receptioral models of biological interest: alfa, beta and gamma-cyclodextrins

Studio sulle caratteristiche aromatiche di mele “Pink Lady” su due diversi portainnesto e diverso regime idrico.

Indagini tramite HS-SPME/GC-MS su prodotti di degrado di vari consolidanti per legni archeologici di alcuni reperti trattati.

Aroma of green sicilian table olive under different irrigation treatments by SPME-GC/MS

Electronic ionization mass spectra of 3-(5'-(3'-methylisoxazol))- and 3-(3'-(5'-methylisoxazol)-2-styryl-4(3H)quinazolinones of pharmaceutical interest:an useful tool to distinguish the two isomeric series

Fruit physical, chemical and aromatic attributes of early, intermediate and late apricot cultivars

BACKGROUND: In order to reach good fruit quality, apricots require a balance of sugars and acids as well as a strong apricot aroma. In this study, fruit quality of early, intermediate and late apricot cultivars was evaluated by measuring physical, chemical and olfactory attributes. Multivariate analysis of quality and aroma attributes was used to identify groups of similar cultivars and association with ripening season. RESULTS: Physical, chemical and aromatic attributes showed great variation among cultivars but no relation to ripening season. Aromatic profiles (34 volatiles) of fruit tissues indicated qualitative and quantitative differences among cultivars. Ninfa and Mandorlon were riche…

H-NMR and FT-IR study of the state of melatonin confined in membrane models: location and interactions of melatonin in water free lecithin and AOT reversed micelles

The state of melatonin confined either in dry lecithin or bis(2-ethylhexyl) sulfosuccinate sodium salt (AOT) reversed micelles has been investigated by H-NMR and FT-IR spectroscopies as a function of the melatonin to surfactant molar ratio (R). The analysis of experimental results leads to hypothesize that, independently of R and the surfactant nature and as a consequence of anisotropic melatonin/surfactant interactions, melatonin is totally solubilized in reversed micelles and mainly located by opportune orientation in the nanodomain constituted by the surfactant head groups. The absence of significant spectral changes related to the protons linked to the first carbon atoms of surfactant a…

Variazione della componente aromatica di mele “Pink Lady” in risposta al vigore del portinnesto e agli apporti idrici.

Influence of wine-making technique and aging on the volatile fraction of red wine cultivars Perricone by SPME-GC/MS. In: Book of abstracts

Dry lecithin reversed micelles as biomebrane models: interaction with vitamin E

Analysis of Melatonin interaction with receptorial models of biological interest: "alpha - beta - and gamma - cyclodextrins"