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Fanfoni L, Marsich E, Turco G, Breschi L, Cadenaro M. Development of di-methacrylate quaternary ammonium monomers with antibacterial activity. Acta Biomater 2021; 129:138-147. [PMID: 34023457 DOI: 10.1016/j.actbio.2021.05.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/07/2021] [Accepted: 05/11/2021] [Indexed: 10/21/2022]
Abstract
Nine antibacterial di-methacrylate monomers based on bis-quaternary ammonium salts (bis-QAMs) were synthesized and structurally characterized. The biological activity of the bis-QAMs was tested in terms of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) on different bacterial strains achieving promising results and, in most cases, a complete bactericidal effect using a bis-QAM concentration lower than 1 mg/mL. Two of the structures showed comparable and superior activity against S. mutans than the commercial monomer 12-methacryloyloxydodecyl pyridinium bromide (MDBP). All the bis-QAMs here described were able to inhibit S. mutans biofilm formation at a concentration equal to the MIC value. From the analysis of the obtained data, some correlation regarding the structure and the antibacterial activity of the bis-QAMs could be drawn: a flexible alkyl C12 spacer between the two quaternary ammonium moieties increased the monomer antibacterial effect in comparison to the aromatic ones; the equilibrium between hydrophobic and hydrophilic moieties was directly correlated to the bactericidal range of action; the increase of the steric hindrance of the ammonium side groups might be both advantageous or disadvantageous to the antibacterial efficacy depending on the whole monomer chemical structure. Even though the possible correlation between the monomer structures and their bacteriostatic or bactericidal effect is under investigation, the monomers exhibited low cytotoxicity on human dental pulp stem cells, confirming their promising potential in the dental materials' field. STATEMENT OF SIGNIFICANCE: The use of dental resins with antibacterial monomers might prevent the formation of secondary caries at the restoration margins. For this purpose, a series of di-methacrylate bis-quaternary ammonium monomers (QAMs) was developed. Unlike antibacterial mono-methacrylate monomers already described in the literature, the synthesized di-methacrylate monomers have the potential of acting as cross-linkers stabilizing the polymeric network and bear two quaternary ammonium groups that increase their antibacterial ability. The QAMs exert bactericidal activity on both Gram(+) and Gram(-) bacterial strains maintaining at the same time good biocompatibility with the oral environment. Some structural elements of the monomers were clearly related to high antibacterial properties, and this can help design new active structures and better understand their mechanism of action.
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Porrelli D, Bevilacqua L, Tacchino G, Brugnera C, Fanfoni L, Turco G, Maglione M. In vitro study on conditioned dental root surfaces: evaluation of wettability, smear layer, and blood clot adhesion. Quintessence Int 2021; 52:624-634. [PMID: 33688717 DOI: 10.3290/j.qi.b1044167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVES The aim was to investigate the efficacy of citric acid and ethylenediaminetetraacetic acid (EDTA)-based treatments on smear layer removal and blood clot formation and stabilization. METHOD AND MATERIALS After scaling and root planing, 126 root samples were divided into seven groups treated with: deionized water; saline; citric acid solution; Ultradent Citric Acid gel; EDTA solution; EDTA-based PrefGel; or untreated. Each group was divided into three subgroups: I for the evaluation of smear layer removal and surface wettability, II and III for the evaluation of blood clot formation and stabilization in static or dynamic rinsing conditions. RESULTS Conditioning agent treatments increased surface wettability with respect to untreated samples (Ultradent: 45 ± 1 degrees, P = 6.2 × 10-3; EDTA: 36 ± 5 degrees, P = 8.9 × 10-7; PrefGel: 47 ± 7 degrees, P = 3.2 × 10-2). Smear layer removal (30% to 60% with respect to untreated samples) was observed for all the conditioning agents. Clot was absent on untreated samples and samples treated with deionized water. Clot quality was significantly higher for samples treated with conditioning agents (P < .05) and similar between group II and III (P > .05). A statistically significant difference (P = .027) was observed for clot coverage of the saline group, comparing static and dynamic rinsing, confirming the positive effect of treatments on clot stabilization. CONCLUSIONS The use of conditioning agents improves smear layer removal and clot formation and stabilization with respect to scaling and root planing procedure only, which is, however, considered an essential procedure to promote wound healing in periodontal surgery.
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Angerame D, Fanfoni L, De Biasi M, Bevilacqua L, Generali L. Influence of Thickness and Shade on the Color of Layered Novel Nanohybrid Composite Systems. INT J PERIODONT REST 2021; 41:451-455. [PMID: 34076645 DOI: 10.11607/prd.4787] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The influence of the layer thickness and composite shade on the final color of Ceram.X composites (Dentsply Sirona) was tested, selecting five intermediate-translucency Ceram.X Universal shades, three high-translucency Ceram.X Duo "enamel" shades, and four low-translucency Ceram.X Duo "dentin" shades. Using cylindrical molds, 850 specimens were obtained, representing the whole array of possible Universal single specimens (in seven thicknesses, ranging from 1.0 to 4.0 mm in 0.5-mm increments) and Duo combinations. The CIELAB coordinates of each specimen were determined with a spectrophotometer. Different thicknesses and composites were compared with Clark's ΔE. The difference in color among specimens of different thicknesses was material-dependent. The thickness and shade of the composite markedly affected the color yield of the Ceram.X system. For each shade of the Universal systems, only one Duo enamel-dentin combination corresponded.
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Fanfoni L, De Biasi M, Antollovich G, Di Lenarda R, Angerame D. Evaluation of degree of conversion, rate of cure, microhardness, depth of cure, and contraction stress of new nanohybrid composites containing pre-polymerized spherical filler. J Mater Sci Mater Med 2020; 31:127. [PMID: 33247779 DOI: 10.1007/s10856-020-06464-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 11/03/2020] [Indexed: 06/12/2023]
Abstract
The aim of the present study was to characterize nanohybrid and nanofilled composites in terms of degree of conversion (DC), rate of cure (RC), microhardness (Vickers hardness number; VHN), depth of cure, and contraction stress (CS). Ceram.X® universal- A3, duo enamel E2, and duo dentin D3 composites were compared to Tetric EvoCeram® and FiltekTMSupreme XTE composites of equivalent dentin and enamel shades under a 40 s photopolymerization protocol. DC was measured by infrared spectroscopy, calculating RC from the kinetic curve. Top and bottom VHN were determined using a Vickers indenter, and bottom/top surface ratio (Vickers hardness ratio; VHR) calculated. CS vs. time was assessed by a universal testing machine and normalized for the specimen bonding area. All materials showed DC < 60%, Ceram.X® composites reaching higher values than the other composites of corresponding shades. RC at 5 s of photopolymerization was always higher than that at 10 s. All the Ceram.X® composites and the lighter-shaded Tetric EvoCeram® and FiltekTMSupreme XTE composites reached the RC plateau after 25 s, the remaining materials showed a slower kinetic trend. Tetric EvoCeram® and FiltekTMSupreme XTE composites displayed the softest and the hardest surfaces, respectively. Differently from darker-shaded materials, the universal and the three enamel-shaded composites resulted optimally cured (VHR > 80%). The tested composites differed in CS both during and after light cure, Tetric EvoCeram® and FiltekTMSupreme XTE composites displaying the highest and the lowest CS, respectively. Only the Ceram.X® universal-A3 reached a CS plateau value. The tested composites exhibited material-dependent chemo-mechanical properties. Increasing the curing time and/or reducing the composite layer thickness for dentin-shaded composites appears advisable.
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Affiliation(s)
- Lidia Fanfoni
- University Clinical Department of Medical, Surgical, and Health Sciences, University of Trieste, Trieste, Italy
| | - Matteo De Biasi
- University Clinical Department of Medical, Surgical, and Health Sciences, University of Trieste, Trieste, Italy
| | - Gabriele Antollovich
- University Clinical Department of Medical, Surgical, and Health Sciences, University of Trieste, Trieste, Italy
| | - Roberto Di Lenarda
- University Clinical Department of Medical, Surgical, and Health Sciences, University of Trieste, Trieste, Italy
| | - Daniele Angerame
- University Clinical Department of Medical, Surgical, and Health Sciences, University of Trieste, Trieste, Italy.
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Cadenaro M, Maravic T, Comba A, Mazzoni A, Fanfoni L, Hilton T, Ferracane J, Breschi L. The role of polymerization in adhesive dentistry. Dent Mater 2019; 35:e1-e22. [DOI: 10.1016/j.dental.2018.11.012] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 11/12/2018] [Accepted: 11/13/2018] [Indexed: 10/27/2022]
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Fanfoni L, Marchesi G, Baccarini F, Turco G, Breschi L, Cadenaro M. Polymerization of dual resin cements light-cured through different ceramic materials. Dent Mater 2018. [DOI: 10.1016/j.dental.2018.08.096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
Hydroformylation of fluorinated alkenes is an efficient method for the preparation of fluorinated functionalized building blocks for the synthesis of biologically active target structures. In this article we summarize known hydroformylation reactions of fluorinated olefins and we add new results from our research groups. Particular attention is paid to the remarkable influence of organofluorine substituents on catalyst activity, regio- and stereoselectivity of the hydroformylation reaction.
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Affiliation(s)
- Lidia Fanfoni
- Institut für Organische Chemie Albert-Ludwigs-Universität Freiburg Albertstrasse 21, 79104 Freiburg i. Bg., Germany
| | - Lisa Diab
- Institut für Organische Chemie Albert-Ludwigs-Universität Freiburg Albertstrasse 21, 79104 Freiburg i. Bg., Germany
| | - Tomas Smejkal
- Syngenta Crop Protection Münchwilen AG Schaffhauserstrasse, CH-4332 Stein, Switzerland.
| | - Bernhard Breit
- Institut für Organische Chemie Albert-Ludwigs-Universität Freiburg Albertstrasse 21, 79104 Freiburg i. Bg., Germany.
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Benedetti F, Berti F, Campaner P, Fanfoni L, Demitri N, Olajuyigbe FM, De March M, Geremia S. Impact of Stereochemistry on Ligand Binding: X-ray Crystallographic Analysis of an Epoxide-Based HIV Protease Inhibitor. ACS Med Chem Lett 2014; 5:968-72. [PMID: 25221650 DOI: 10.1021/ml500092e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Accepted: 07/14/2014] [Indexed: 01/01/2023] Open
Abstract
A new pseudopeptide epoxide inhibitor, designed for irreversible binding to HIV protease (HIV-PR), has been synthesized and characterized in solution and in the solid state. However, the crystal structure of the complex obtained by inhibitor-enzyme cocrystallization revealed that a minor isomer, with inverted configuration of the epoxide carbons, has been selected by HIV-PR during crystallization. The structural characterization of the well-ordered pseudopeptide, inserted in the catalytic channel with its epoxide group intact, provides deeper insights into inhibitor binding and HIV-PR stereoselectivity, which aids development of future epoxide-based HIV inhibitors.
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Affiliation(s)
- Fabio Benedetti
- Department
of Chemical and Pharmaceutical Sciences, Centre of Excellence in Biocrystallography, University of Trieste, Via Giorgeri 1, 34127 Trieste, Italy
| | - Federico Berti
- Department
of Chemical and Pharmaceutical Sciences, Centre of Excellence in Biocrystallography, University of Trieste, Via Giorgeri 1, 34127 Trieste, Italy
| | - Pietro Campaner
- Department
of Chemical and Pharmaceutical Sciences, Centre of Excellence in Biocrystallography, University of Trieste, Via Giorgeri 1, 34127 Trieste, Italy
| | - Lidia Fanfoni
- Department
of Chemical and Pharmaceutical Sciences, Centre of Excellence in Biocrystallography, University of Trieste, Via Giorgeri 1, 34127 Trieste, Italy
| | - Nicola Demitri
- Department
of Chemical and Pharmaceutical Sciences, Centre of Excellence in Biocrystallography, University of Trieste, Via Giorgeri 1, 34127 Trieste, Italy
| | - Folasade M. Olajuyigbe
- Department
of Chemical and Pharmaceutical Sciences, Centre of Excellence in Biocrystallography, University of Trieste, Via Giorgeri 1, 34127 Trieste, Italy
- Department
of Biochemistry, Federal University of Technology, P.M.B. 704, Akure 340001, Ondo State, Nigeria
| | - Matteo De March
- Department
of Chemical and Pharmaceutical Sciences, Centre of Excellence in Biocrystallography, University of Trieste, Via Giorgeri 1, 34127 Trieste, Italy
| | - Silvano Geremia
- Department
of Chemical and Pharmaceutical Sciences, Centre of Excellence in Biocrystallography, University of Trieste, Via Giorgeri 1, 34127 Trieste, Italy
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Fanfoni L, Meduri A, Zangrando E, Castillon S, Felluga F, Milani B. New chiral P-N ligands for the regio- and stereoselective Pd-catalyzed dimerization of styrene. Molecules 2011; 16:1804-24. [PMID: 21343886 PMCID: PMC6259647 DOI: 10.3390/molecules16021804] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2010] [Revised: 02/17/2011] [Accepted: 02/18/2011] [Indexed: 11/16/2022] Open
Abstract
Two new chiral, enantiomerically pure, hybrid P-N ligands, namely (2R,5S)-2-phenyl-3-(2-pyridyl)-1,3-diaza-2-phosphanicyclo[3,3,0]octan-4-one (1) and (2R,5S)-2-phenyl-3-(2-pyridyl)-1,3-diaza-2-phosphanicyclo[3,3,0]octane (2), have been synthesized starting from L-proline. The two ligands differ in the presence or not of a carbonyl group in the diazaphosphane ring. Their coordination chemistry towards Pd(II) was studied by reacting them with [Pd(CH3)Cl(cod)]. A different behaviour was observed: ligand 2 shows the expected bidentate chelating behaviour leading to the mononuclear Pd-complex, while ligand 1 acts as a terdentate ligand giving a dinuclear species. The corresponding cationic derivatives were obtained from the palladium neutral complexes, both as mono- and dinuclear derivatives, and tested as precatalysts for styrene dimerization, yielding E-1,3-diphenyl-1-butene regio- and stereoselectively as the sole product. A detailed analysis of the catalytic behaviour is reported.
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Affiliation(s)
- Lidia Fanfoni
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy; E-Mails: (L.F.); (A.M.); (E.Z.); (F.F.)
| | - Angelo Meduri
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy; E-Mails: (L.F.); (A.M.); (E.Z.); (F.F.)
| | - Ennio Zangrando
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy; E-Mails: (L.F.); (A.M.); (E.Z.); (F.F.)
| | - Sergio Castillon
- Department de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, C. Marcel.lí Domingo s/n 43007 Tarragona, Spain; E-Mail: (S.C.)
| | - Fulvia Felluga
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy; E-Mails: (L.F.); (A.M.); (E.Z.); (F.F.)
| | - Barbara Milani
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy; E-Mails: (L.F.); (A.M.); (E.Z.); (F.F.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +39-040-558-3956; Fax: +39-040-558-3903
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D’Amora A, Fanfoni L, Cozzula D, Guidolin N, Zangrando E, Felluga F, Gladiali S, Benedetti F, Milani B. Addressing the Poly- to Oligo-ketone Selectivity in Styrene Carbonylation Catalyzed by Palladium/bpy Complexes. Effect of the 6-Alkyl Substitution. Organometallics 2010. [DOI: 10.1021/om100585x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Angela D’Amora
- Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Lidia Fanfoni
- Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Daniela Cozzula
- Dipartimento di Chimica, Università di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Nicol Guidolin
- Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Ennio Zangrando
- Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Fulvia Felluga
- Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Serafino Gladiali
- Dipartimento di Chimica, Università di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Fabio Benedetti
- Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Barbara Milani
- Dipartimento di Scienze Chimiche, Università di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
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Baratta W, Benedetti F, Del Zotto A, Fanfoni L, Felluga F, Magnolia S, Putignano E, Rigo P. Chiral Pincer Ruthenium and Osmium Complexes for the Fast and Efficient Hydrogen Transfer Reduction of Ketones. Organometallics 2010. [DOI: 10.1021/om1004918] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Walter Baratta
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Fabio Benedetti
- Dipartimento di Scienze Chimiche, Università di Trieste, Via L. Giorgieri 1, I-34127 Trieste, Italy
| | - Alessandro Del Zotto
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Lidia Fanfoni
- Dipartimento di Scienze Chimiche, Università di Trieste, Via L. Giorgieri 1, I-34127 Trieste, Italy
| | - Fulvia Felluga
- Dipartimento di Scienze Chimiche, Università di Trieste, Via L. Giorgieri 1, I-34127 Trieste, Italy
| | - Santo Magnolia
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Elisabetta Putignano
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Pierluigi Rigo
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
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Baratta W, Fanfoni L, Magnolia S, Siega K, Rigo P. Benzo[h]quinoline Pincer Ruthenium and Osmium Catalysts for Hydrogenation of Ketones. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200901253] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Affiliation(s)
- Fulvia Felluga
- Dipartimento di Scienze Chimiche, Università di Trieste, via Giorgieri 1, I-34127 Trieste, Italy, and Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Walter Baratta
- Dipartimento di Scienze Chimiche, Università di Trieste, via Giorgieri 1, I-34127 Trieste, Italy, and Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Lidia Fanfoni
- Dipartimento di Scienze Chimiche, Università di Trieste, via Giorgieri 1, I-34127 Trieste, Italy, and Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Giuliana Pitacco
- Dipartimento di Scienze Chimiche, Università di Trieste, via Giorgieri 1, I-34127 Trieste, Italy, and Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Pierluigi Rigo
- Dipartimento di Scienze Chimiche, Università di Trieste, via Giorgieri 1, I-34127 Trieste, Italy, and Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Fabio Benedetti
- Dipartimento di Scienze Chimiche, Università di Trieste, via Giorgieri 1, I-34127 Trieste, Italy, and Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, via Cotonificio 108, I-33100 Udine, Italy
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