15 results on '"Maria Cecilia Rossi"'
Search Results
2. HR‐ 1 H NMR spectroscopy and multivariate statistical analysis to determine the composition of herbal mixtures for infusions
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Maria Cecilia Rossi, Davide Bertelli, Lucia Marchetti, Federica Pellati, and Stefania Benvenuti
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Central composite design ,Chemistry ,business.industry ,010401 analytical chemistry ,Plant Science ,General Medicine ,Health benefits ,01 natural sciences ,Biochemistry ,0104 chemical sciences ,Analytical Chemistry ,Chemometrics ,010404 medicinal & biomolecular chemistry ,Complementary and alternative medicine ,Drug Discovery ,Statistics ,Proton NMR ,Molecular Medicine ,Lemon balm ,Medicinal herbs ,Multivariate statistical ,business ,Quality assurance ,Food Science - Abstract
Introduction The ever-growing diffusion and consumption of herbal teas, due to their sensory attributes and well-known health benefits exposes them to the real risk of adulteration, especially in the case of commercial mixtures already minced for infusion. Therefore, novel and suitable tools for the control of these valuable products are increasingly required. Objectives This work provides new insights for the authenticity study of infusions. The main objective was verifying the potential of proton nuclear magnetic resonance (1 H-NMR) combined with partial least square (PLS) regression to build highly predictive models, useful for the determination of the real amounts of herbs in mixtures, by the simple analysis of the related infusion. Materials and methods Peppermint, fennel, lemon balm, and passiflora were chosen to set-up an experimental plan according to a central composite design (CCD). One-dimensional nuclear Overhauser effect spectroscopy (1D-NOESY) spectra were properly pretreated and then analysed by chemometrics to extract significant information from the raw data. Results Venetian-blind cross-validation and different chemometric indicators (RMSEC, RMSECV, RMSEP, R2 CAL , R2 CV, R2 PRED ) were used to establish the best model, which include four factors explaining 88.70 and 83.77% of the total variance in X and Y, respectively. Conclusions These promising results have laid the basis for further development of the method, to extend its applicability and make it more scalable. This tool could replace expensive separative techniques and protect the rights of consumers with particular attention to safety issues and quality assurance. more...
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- 2020
- Full Text
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Catalog
3. Novel application of 1H NMR spectroscopy coupled with chemometrics for the authentication of dark chocolate
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Eleonora Truzzi, Lucia Marchetti, Arianna Fratagnoli, Maria Cecilia Rossi, and Davide Bertelli
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General Medicine ,Food Science ,Analytical Chemistry - Published
- 2023
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4. Nucleoside 2′,3′-Cyclic Monophosphates in Aphanizomenon flos-aquae Detected through Nuclear Magnetic Resonance and Mass Spectrometry
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Alfonso Zambon, Valeria Righi, Adele Mucci, Maria Cecilia Rossi, Francesca Parenti, Emanuela Libertini, Zambon A., Righi V., Parenti F., Libertini E., Rossi M.C., and Mucci A.
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Magnetic Resonance Spectroscopy ,Aphanizomenon flos-Aquae ,Aphanizomenon flos-aquae (dietary supplement) ,ESI-QO mass spectrometry ,Klamath algae ,nuclear magnetic resonance spectroscopy ,nucleoside 2′,3′-cyclic monophosphates ,Mass spectrometry ,Aphanizomenon ,Mass Spectrometry ,Oregon ,Nuclear magnetic resonance ,parasitic diseases ,Metabolome ,Molecule ,Nucleoside ,Spectroscopy ,Molecular Structure ,biology ,Chemistry ,General Chemistry ,Nuclear magnetic resonance spectroscopy ,biology.organism_classification ,nucleoside 2′ ,nucleoside 2′,3′-cyclic monophosphate ,General Agricultural and Biological Sciences ,3′-cyclic monophosphates - Abstract
Aphanizomenon flos-Aquae (AFA) cyanobacteria from Klamath Lake (Oregon) are considered a "superfood" due to their broad nutritional profile that has proved to have health-enhancing properties. The AFA metabolome is quite complex. Here, we present a study that, combining multinuclear 1H, 31P, and 13C Nuclear Magnetic Resonance (NMR) spectroscopy and high-resolution mass spectrometry, led to the detection of uncommon phosphorylated metabolites in AFA. We focused our attention on 31P NMR signals at 20 ppm, a chemical shift that usually points to the presence of phosphonates. The molecules contributing to 20 ppm 31P NMR signals revealed, instead, to be nucleoside 2′,3′-cyclic monophosphates. These metabolites were fully characterized by multinuclear 1H, 31P, and 13C NMR spectroscopy and high-resolution mass spectrometry. more...
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- 2019
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5. Novel Strategy for the Recognition of Adulterant Vegetable Oils in Essential Oils Commonly Used in Food Industries by Applying
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Eleonora, Truzzi, Lucia, Marchetti, Stefania, Benvenuti, Annalisa, Ferroni, Maria Cecilia, Rossi, and Davide, Bertelli
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Magnetic Resonance Spectroscopy ,Oils, Volatile ,counterfeit ,Food Industry ,Plant Oils ,DOSY ,Food Contamination ,essential oils ,fatty acids ,Article ,seed oils - Abstract
Essential oils (EOs) are valuable products commonly employed in the food industry and intensively studied as biopreservatives for the extension of food shelf-life. Unfortunately, EOs might be counterfeit to increase industrial profits. Among the possible adulterants, vegetable oils (VOs) must be considered for their characteristics and low costs. We aimed to apply nuclear magnetic resonance (NMR) spectroscopy for the detection and identification of VOs in mixtures with EOs. This innovative strategy is based on comparing the peak area ratio matrices of characteristic VO 13C NMR fatty acid signals with those of adulterated EOs. The identification of the VOs was achieved by calculating the matrix similarity at different confidence levels. The strategy demonstrated the capacity to efficiently recognize the presence of adulteration and the type of VO adulterant in mixtures. Thus, the method was applied to 20 commercial EOs, and VOs were detected and then identified in four samples. more...
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- 2021
6. HR
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Lucia, Marchetti, Maria Cecilia, Rossi, Federica, Pellati, Stefania, Benvenuti, and Davide, Bertelli
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Magnetic Resonance Spectroscopy ,Multivariate Analysis ,Least-Squares Analysis - Abstract
The ever-growing diffusion and consumption of herbal teas, due to their sensory attributes and well-known health benefits exposes them to the real risk of adulteration, especially in the case of commercial mixtures already minced for infusion. Therefore, novel and suitable tools for the control of these valuable products are increasingly required.This work provides new insights for the authenticity study of infusions. The main objective was verifying the potential of proton nuclear magnetic resonance (Peppermint, fennel, lemon balm, and passiflora were chosen to set-up an experimental plan according to a central composite design (CCD). One-dimensional nuclear Overhauser effect spectroscopy (1D-NOESY) spectra were properly pretreated and then analysed by chemometrics to extract significant information from the raw data.Venetian-blind cross-validation and different chemometric indicators (RMSEC, RMSECV, RMSEP, RThese promising results have laid the basis for further development of the method, to extend its applicability and make it more scalable. This tool could replace expensive separative techniques and protect the rights of consumers with particular attention to safety issues and quality assurance. more...
- Published
- 2020
7. Development of 87 Sr/ 86 Sr maps as targeted strategy to support wine quality
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Marina Cocchi, Daniela Manzini, Lorenzo Tassi, Caterina Durante, Lucia Bertacchini, Simona Sighinolfi, Andrea Marchetti, and Maria Cecilia Rossi
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Vine ,Sr ,Traceability ,media_common.quotation_subject ,01 natural sciences ,Analytical Chemistry ,86 ,Sr values ,Food ,Geographical traceability ,Isotopic maps ,0404 agricultural biotechnology ,Quality (business) ,media_common ,Wine ,Optimal sampling ,business.industry ,010401 analytical chemistry ,Environmental resource management ,04 agricultural and veterinary sciences ,General Medicine ,040401 food science ,0104 chemical sciences ,Environmental science ,Scale (map) ,business ,Food Science - Abstract
This study summarizes the results obtained from a systematic and long-term project aimed at the development of tools to assess the provenance of food in the oenological sector. In particular, 87Sr/86Sr isotope ratios were measured on statistically representative set of soils, vine branches and wines sampled in the production district of Modena, worldwide known for the Lambrusco wines production. The obtained data were used to build strontium isotopic maps able to objectively support the Lambrusco PDO wines origin as well as other products of the Modena district. Finally, a strong relationship was found between the 87Sr/86Sr isotope ratios of soils and vine branches on a large scale, highlighting and confirming once more the idea that plants can also represent an optimal sampling device to support geographical traceability. more...
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- 2018
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8. Nucleoside 2',3'-Cyclic Monophosphates in
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Alfonso, Zambon, Valeria, Righi, Francesca, Parenti, Emanuela, Libertini, Maria Cecilia, Rossi, and Adele, Mucci
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Oregon ,Magnetic Resonance Spectroscopy ,Molecular Structure ,Aphanizomenon ,Nucleosides ,Mass Spectrometry - Published
- 2019
9. Development of
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Caterina, Durante, Lucia, Bertacchini, Marina, Cocchi, Daniela, Manzini, Andrea, Marchetti, Maria Cecilia, Rossi, Simona, Sighinolfi, and Lorenzo, Tassi
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Soil ,Strontium Isotopes ,Italy ,Food Quality ,Vitis ,Wine ,Food Analysis - Abstract
This study summarizes the results obtained from a systematic and long-term project aimed at the development of tools to assess the provenance of food in the oenological sector. In particular
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- 2017
10. Use of HR-NMR to classify propolis obtained using different harvesting methods
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Maria Cecilia Rossi, Davide Bertelli, Maria Plessi, and Giulia Papotti
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Chemometrics ,Chromatography ,Multivariate analysis ,Chemistry ,Proton NMR ,Statistical analysis ,Propolis ,Multivariate statistical ,Spectral data ,Linear discriminant analysis ,Industrial and Manufacturing Engineering ,Food Science - Abstract
Summary Propolis has various biological activities closely related to the composition which varies according to environmental factors and also to the method of production. This study was aimed at determining whether or not HR-NMR and multivariate statistical analysis were able to classify propolis according to the method used to harvest it. Sixty propolis samples were analysed in all. The ethanolic propolis extracts were initially analysed for quantification of the main bioactive substances, balsams and waxes. The 1H NMR and heteronuclear multiple bond correlation spectra were then acquired. Spectral data were analysed by the application of multivariate statistical techniques (Factor Analysis and General Discriminant Analysis). The best results were obtained using the 1H NMR which furnishes a sufficiently effective model by analysing the spectral region between 4.50 and 13.00 ppm (predictive capacity: 96.7%). more...
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- 2010
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11. 1H, 13C, 195Pt NMR study on platinum(II) interaction with sulphur containing Amadori compounds
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Gaetano Marverti, Monica Saladini, Maria Cecilia Rossi, Sandra Lazzari, Romano Grandi, and Erika Ferrari
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Platinum complexes ,Inorganic chemistry ,Cystine ,chemistry.chemical_element ,Amadori compounds ,195Pt NMR ,Condensation reaction ,Medicinal chemistry ,Sulfur ,Inorganic Chemistry ,Metal ,chemistry.chemical_compound ,chemistry ,visual_art ,Amadori rearrangement ,Materials Chemistry ,visual_art.visual_art_medium ,Molecule ,Physical and Theoretical Chemistry ,Platinum ,Cysteine - Abstract
The NMR study on the interaction of Pt(II) with Amadori compounds is performed. The Amadori compounds are derived from the reaction of β- d -glucose with l -cystine leading to N,N′-di-(1-deoxy-β-fructos-1-yl)- l -cystine [FruCyscys], and with l -methionine leading to N-(1-deoxy-β-fructos-1-yl)- l -methionine [FruMet]. The great instability of 2-(1,2,3,4,5-pentahydroxypentyl)-1,3-thiazolidine-4-carboxylic acid [GlcCys], formed by the condensation reaction of β- d -glucose and l -cysteine, prevents the formation of its Pt(II) complexes. Differently, FruMet well reacts with K2PtCl4 in 1:1 M/L molar ratio leading to the formation of [Pt(FruMet-N,S)Cl2], in which the Amadori compound coordinates the metal ion through nitrogen and sulphur atoms. FruMet originates also a solid trans complex [Pt(FruMet-N,S)2]Cl2. Its NMR solution study allowed to identify two isomers with respect to nitrogen and sulphur atoms: R,R and S,S. In [Pt2FruCyscysCl4] species, FruCyscys molecule links two Pt(II) ions giving rise to two pentaatomic N,S-chelate rings. more...
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- 2007
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12. Simultaneous separation and identification of hashish constituents by coupled liquid chromatography-mass spectrometry (HPLC-MS)
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Gianfranco Gamberini, Valeria Ferioli, Cecilia Rustichelli, Maria Cecilia Rossi, and Francesca Vezzalini
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Chromatography ,Chemistry ,Organic Chemistry ,Clinical Biochemistry ,Hashish ,Mass spectrometry ,Biochemistry ,High-performance liquid chromatography ,Analytical Chemistry ,chemistry.chemical_compound ,Liquid chromatography–mass spectrometry ,medicine ,Derivatization ,medicine.drug - Abstract
This paper reports the use of liquid chromatography for the separation and determination of the major cannabinoids extracted from hashish samples. The direct coupling to the mass spectrometer enables the selective identification both of neutral and acidic cannabinoids. The developed method does not require any preliminary derivatization and should, therefore, be of interest in forensic analysis for simple and unequivocal determination of hashish constituents. more...
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- 1996
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13. On the Reactivity of Acetylenes Coordinated to Cobalt. 9. Effects of Substitution and Coordination on the 13C-NMR Chemical Shifts of the sp Carbons of (.mu.2-R1C2R2)Co2(CO)6 Complexes. Molecular Structure of (.mu.2-PhC2SiPh3)Co2(CO)6
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Gyula Pályi, Gábor Szalontai, Tamas Bartik, Gyula Varadi, Claudia Zucchi, Franco Ghelfi, István T. Horváth, Carlo Guastini, Maria Cecilia Rossi, Berit Happ, and Angiola Chiesi-Villa
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Ligand ,Stereochemistry ,Chemical shift ,Organic Chemistry ,Carbon-13 NMR ,Inorganic Chemistry ,chemistry.chemical_compound ,Crystallography ,Acetylene ,chemistry ,Moiety ,Molecule ,Reactivity (chemistry) ,Orthorhombic crystal system ,Physical and Theoretical Chemistry - Abstract
Thirty-four @2-R1C2R2)Co2(C0)6 complexes (14 new) were prepared and characterized by their IR v(C0) and lH- and 13C-NMR spectra. The 13C-NMR chemical shifts of the coordinated sp carbon atoms were correlated with those of the corresponding free acetylenes. This indicated that the interaction between the R1 and R2 groups and the c2co2(co)6 moiety is very sensitive not only to the donor/acceptor character of R1 and R2 but also to the orbital symmetry of the atoms attached directly to the C(sp) atoms. The changes of the W3C) values of the C(sp) atoms upon coordination were also analyzed in these terms. It is concluded that although the dinuclear p2-coordination of the acetylene results in a high degree of excitation the stability of the c2co2(co)6 moiety diminished the reactivity of the organic ligand. Differences in the reactivity of the @2-R1C2R2)Co2(CO)6 complexes in carbonylation are also discussed. The crystal and molecular structure of (PhC2SiPhs)Coz(CO)a was determined by single crystal X-ray diffraction. This compound crystallizes in the orthorhombic Pbca space group with a = 28.790(2) A, b = 11.577(1) A, c = 17.833(2) A, 2 = 8. The structure was determined with R = 0.039, R, = 0.036. more...
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- 1995
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14. Headspace solid-phase microextraction-gas chromatography--mass spectrometry analysis of the volatile compounds of Evodia species fruits
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Davide Bertelli, Fumihiko Yoshizaki, Stefania Benvenuti, Federica Pellati, and Maria Cecilia Rossi
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Optimization ,Dried fruit ,Linalyl acetate ,Solid-phase microextraction ,Biochemistry ,Central composite design ,Gas Chromatography-Mass Spectrometry ,Analytical Chemistry ,Evodia ,chemistry.chemical_compound ,Linalool ,HS-SPME ,GC–MS ,Plant materials ,Chromatography ,Chemistry ,Organic Chemistry ,Extraction (chemistry) ,General Medicine ,Experimental design ,Myrcene ,Volatile compounds ,Gas chromatography ,Gas chromatography–mass spectrometry ,Volatilization ,Evodia, HS-SPME, GC–MS, Volatile compounds, Plant materials, Optimization, Experimental design, Central composite design - Abstract
In this study the investigation of the aroma compounds of dried fruits of Evodia rutaecarpa (Juss.) Benth. and E. rutaecarpa (Juss.) Benth. var. officinalis (Dode) Huang (i.e. E. officinalis Dode) (Rutaceae family) was carried out to identify the odorous target components responsible for the characteristic aroma of these valuable natural products. To avoid the traditional and more time-consuming hydrodistillation, the analyses were carried out by means of headspace solid-phase microextraction (HS-SPME) coupled to gas chromatography-mass spectrometry (GC-MS). The SPME headspace volatiles were collected using a divinylbenzene-carboxen-polydimethylsiloxane (DVB-CAR-PDMS) fiber. The extraction conditions were optimized using a response surface experimental design to analyze the effect of three factors: extraction temperature, equilibrium time and extraction time. The best response was obtained when the extraction temperature was around 80 degrees C, equilibrium time near 25 min and extraction time close to 18 min. Analyses were performed by GC-MS with a 5% diphenyl-95% dimethyl polysiloxane (30 m x 0.25 mm I.D., film thickness 0.25 microm) capillary column using He as the carrier gas and a programmed temperature run. The main components of the HS-SPME samples of E. rutaecarpa (concentration >3.0%) were limonene (33.79%), beta-elemene (10.78%), linalool (8.15%), myrcene (5.83%), valencene (4.73%), beta-caryophyllene (4.62%), linalyl acetate (4.13%) and alpha-terpineol (3.99%). As for E. officinalis, the major compounds were myrcene (32.79%), limonene (18.36%), beta-caryophyllene (9.92%), trans-beta-ocimene (6.04%), linalool (5.88%), beta-elemene (7.85%) and valencene (4.62%). more...
- Published
- 2005
15. Molecular characterization of human gastric mucosa by HR-MAS magnetic resonance spectroscopy
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M. R. Tosi, Luisa Schenetti, Maria Cecilia Rossi, G. Di Febo, Carlo Calabrese, Vitaliano Tugnoli, Adele Mucci, V. Tugnoli, A. Mucci, L. Schenetti, C. Calabrese, G. Di Febo, M.C. Rossi, and M.R. Tosi
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Pathology ,medicine.medical_specialty ,Magnetic Resonance Spectroscopy ,Biopsy ,Biology ,ex vivo HR-MAS MRS ,biochemical markers ,In vivo ,Genetics ,Gastric mucosa ,medicine ,Humans ,gastric mucosa ,healthy gastric mucosa ,medicine.diagnostic_test ,digestive, oral, and skin physiology ,Cancer ,General Medicine ,Nuclear magnetic resonance spectroscopy ,ex vivo HR-MAS NMR ,medicine.disease ,Molecular medicine ,medicine.anatomical_structure ,Gastric Mucosa ,Molecular Profile ,EX VIVO HR-MAS MRS ,BIOCHEMICAL CHARACTERIZATION ,Ex vivo - Abstract
The present study was aimed at identifying the molecular profile characteristic of the healthy human gastric mucosa. Ex vivo HR-MAS magnetic resonance spectroscopy performed at 9.4 Tesla (400.13 MHz for (1)H) on gastric specimens collected during endoscopy, permits the identification of more than forty species giving a detailed picture of the biochemical pattern of the gastric tissues. These preliminary data will be used for a comparison with gastric preneoplastic and neoplastic situations. Moreover, the full knowledge of the biochemical pattern of the healthy gastric tissues is the necessary presupposition for the application of magnetic resonance spectroscopy directly in vivo. more...
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