A5022182794- NMR spectroscopy and applications
- Metabolomics and Mass Spectrometry Studies
- Surfactants and Colloidal Systems
- Advanced NMR Techniques and Applications
- Material Dynamics and Properties
- Nuts composition and effects
- Liquid Crystal Research Advancements
- Microbial Metabolic Engineering and Bioproduction
- Transgenic Plants and Applications
- Hydrogels: synthesis, properties, applications
- Genetically Modified Organisms Research
- Cholinesterase and Neurodegenerative Diseases
- Plant Virus Research Studies
- Advanced Chemical Sensor Technologies
- Polymer crystallization and properties
- Thermodynamic properties of mixtures
- Chemical Reaction Mechanisms
- Proteins in Food Systems
- Advanced MRI Techniques and Applications
- Fermentation and Sensory Analysis
- Electrostatics and Colloid Interactions
- Food composition and properties
- Polysaccharides Composition and Applications
- Polymer Nanocomposites and Properties
- Characterization and Applications of Magnetic Nanoparticles
Sapienza University of Rome
2006-2023
University of Calabria
2003-2004
A detailed analysis of the proton high-field NMR spectra aqueous and organic extracts lettuce leaves is reported for first time. combination COSY, TOCSY, 1H–13C HSQC, HMBC bidimensional sequences DOSY was used to assign each spin system separate components complex patterns. large number water-soluble metabolites belonging different classes such as carbohydrates, polyols, acids amino were fully assigned. Moreover, extracted in solvents sterols, fatty acids, diacylglycerophospholipids,...
A complete, rheometrical analysis (steady, oscillatory and transient stress-relaxation experiments) may be performed to indirectly elucidate the inner structure of surfactant solutions over a wide range physicochemical conditions. In this paper, structural changes in cetyltrimethylammonium bromide (CTAB)/H2O mixtures have been studied by set rheological experiments as function composition (2–40 wt% CTAB) temperature (20–70 °C). This system was chosen for several reasons: firstly, it forms...
High-resolution proton NMR spectroscopy was performed on three Italian hazelnut cultivars, Tonda di Giffoni, Mortarella and Gentile Romana, it allowed to define their metabolic profile. The hazelnuts were grown in the same pedoclimatic conditions Monti Cimini (Latium) area. samples obtained by using a modified Bligh-Dyer extraction protocol which did not give rise artefacts arising from demolition of macromolecular structures such as proteins polysaccharides. Metabolites belonging different...
The 1H-NMR methodology used in the study of genetically modified (GM) foods is discussed. Transgenic lettuce (Lactuca sativa cv \"Luxor\") over-expressing Arabidopsis KNAT1 gene presented as a case study. Twenty-two water-soluble metabolites (amino acids, organic sugars) present leaves conventional and GM were monitored by NMR quantified at two developmental stages. spectra did not reveal any difference metabolite composition between wild type counterpart. Statistical analyses variables...
The 1H-NMR methodology used in the study of genetically modified (GM) foods is discussed. Transgenic lettuce (Lactuca sativa cv "Luxor") over-expressing ArabidopsisKNAT1 gene presented as a case study. Twenty-two water-soluble metabolites (amino acids, organic sugars) present leaves conventional and GM were monitored by NMR quantified at two developmental stages. spectra did not reveal any difference metabolite composition between wild type counterpart. Statistical analyses variables...
Apple scab, caused by the fungus Venturia inaequalis, is most serious disease of apple worldwide. Two cultivars (Malus domestica), having different degrees resistance against fungi attacks, were analyzed 1H and 13C nuclear magnetic resonance (NMR) spectroscopy. Aqueous organic extracts both flesh skin studied, over 30 metabolites, classified as acids, amino carbohydrates, phenolic compounds, lipids, sterols, other quantified means one-dimensional (1D) two-dimensional (2D) NMR experiments....
Water dynamics and compartmentation in glutaraldehyde cross-linked bovine serum albumin nanoparticles have been investigated by an integrated nuclear magnetic resonance (NMR) protocol based on water relaxation times self-diffusion coefficients measurements. Multi-exponentially of curves has accounted for according to a diffusive chemical exchange model (see B. P. Hills, S. F. Takacs Belton, Mol. Phys., 1989, 67(4), 903, 913; E. Brosio, M. Belotti R. Gianferri, Food Science Technology: New...
Nuclear magnetic resonance (NMR) and rheology were used as two useful complementary techniques to characterize the solution liquid crystalline microstructures of sodium taurodeoxycholate (NaTDC)/D2O system. NaTDC is very soluble in water. At room temperature NaTDC/D2O mixtures form a low-viscosity isotropic micellar up concentration ca. 12 wt % NaTDC. It follows region, 12−25 NaTDC, that behaves Newtonian viscous fluid with well-defined viscosity value. higher (>25 NaTDC), region high...
The water-holding capacity (WHC) is among the key factors in determining quality of meat and its value, which strongly influenced by content connective tissue proteins like collagen. Therefore, that influence proteins' stability, e.g., pH, ionic strength, antioxidants are used to increase shelf-life, also affect WHC. interaction collagen, whose structure with water molecules, can be studied following behavior diffusion low-resolution 1H NMR experiments. present study addressed collagen...
Pecan nuts (Carya illinoinensis (Wangenh.) K. Koch) contain the highest number of phytochemicals all nuts, are a natural source unsaturated fatty acids and other nutrients can be considered an important addition to Mediterranean diet al.though several studies have been carried out on pecans, employing analytical techniques, no systematic study metabolic profile is available in literature. In this study, pecan three different cultivars was analysed by Nuclear Magnetic Resonance Spectroscopy....
Lamellar phases of some surfactant water system are not infinite, continuous lamellar planes but several experimental findings showed that they contain water-filled defects with highly curved edges. Here, the polydomain phase pentaethylene glycol dodecyl ether(C 12 E 5 )/decane/water has been studied by 1 H-NMR pulsed field gradient experiments (PGSE) and 2 line shapes D O, at a constant (S) to oil (O) weight ratio 51.8/48.2. Within this system, which was observed S+O fraction from 82 wt%,...
'Tonda Gentile Romana' and di Giffoni' (Corylus avellana L.) are two Italian hazelnut cultivars, recognized under the quality labels "Protected Designation of Origin" (PDO) Geographical Indication" (PGI), respectively. Hazelnut seeds characterized by a complex microstructure presence different physical compartments. This peculiarity has been studied evidenced Time Domain (TD) Nuclear Magnetic Resonance (NMR) experiments. technique allowed assessment diffusion compartments, or domains,...
AbstractPolymer electrolytes with ionic conductivities on the order of mS cm-1 at room temperature were prepared from gelification LiClO4 /ethylene carbonate–propylene carbonate (EC–PC) solutions into a poly(acrylonitrile) (PAN) matrix. Oscillating rheological experiments performed gels different solvent/salt molar ratios in to investigate their mechanical properties. Temperature sweep tests (25–120°C) showed changes behaviour that was related structural transitions. A strong–weak gel...