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Paganelli S, Brugnera E, Di Michele A, Facchin M, Beghetto V. Chitosan as a Bio-Based Ligand for the Production of Hydrogenation Catalysts. Molecules 2024; 29:2083. [PMID: 38731574 DOI: 10.3390/molecules29092083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 03/27/2024] [Revised: 04/24/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
Bio-based polymers are attracting increasing interest as alternatives to harmful and environmentally concerning non-biodegradable fossil-based products. In particular, bio-based polymers may be employed as ligands for the preparation of metal nanoparticles (M(0)NPs). In this study, chitosan (CS) was used for the stabilization of Ru(0) and Rh(0) metal nanoparticles (MNPs), prepared by simply mixing RhCl3 × 3H2O or RuCl3 with an aqueous solution of CS, followed by NaBH4 reduction. The formation of M(0)NPs-CS was confirmed by Fourier Transform Infrared Spectroscopy (FT-IR), Differential Scanning Calorimetry (DSC), Thermal Gravimetric Analysis (TGA), Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray Analysis (EDX), Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD). Their size was estimated to be below 40 nm for Rh(0)-CS and 10nm for Ru(0)-CS by SEM analysis. M(0)NPs-CS were employed for the hydrogenation of (E)-cinnamic aldehyde and levulinic acid. Easy recovery by liquid-liquid extraction made it possible to separate the catalyst from the reaction products. Recycling experiments demonstrated that M(0)NPs-CS were highly efficient up to four times in the best hydrogenation conditions. The data found in this study show that CS is an excellent ligand for the stabilization of Rh(0) and Ru(0) nanoparticles, allowing the production of some of the most efficient, selective and recyclable hydrogenation catalysts known in the literature.
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Affiliation(s)
- Stefano Paganelli
- Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, Via Torino 155, 30172 Mestre, Italy
- Consorzio Interuniversitario per le Reattività Chimiche e la Catalisi (CIRCC), Via C. Ulpiani 27, 70126 Bari, Italy
| | - Eleonora Brugnera
- Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, Via Torino 155, 30172 Mestre, Italy
| | - Alessandro Di Michele
- Dipartimento Fisica e Geologia, Università degli Studi di Perugia, Via Pascoli, 06123 Perugia, Italy
| | - Manuela Facchin
- Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, Via Torino 155, 30172 Mestre, Italy
| | - Valentina Beghetto
- Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, Via Torino 155, 30172 Mestre, Italy
- Consorzio Interuniversitario per le Reattività Chimiche e la Catalisi (CIRCC), Via C. Ulpiani 27, 70126 Bari, Italy
- Crossing S.R.L., Viale della Repubblica 193/b, 31100 Treviso, Italy
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2
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Bardella N, Facchin M, Fabris E, Baldan M, Beghetto V. Waste Cooking Oil as Eco-Friendly Rejuvenator for Reclaimed Asphalt Pavement. Materials (Basel) 2024; 17:1477. [PMID: 38611991 PMCID: PMC11012562 DOI: 10.3390/ma17071477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 03/19/2024] [Accepted: 03/20/2024] [Indexed: 04/14/2024]
Abstract
Over 50 MioT of Waste Cooking Oil (WCO) was collected worldwide in 2020 from domestic and industrial activities, constituting a potential hazard for both water and land environments, and requiring appropriate disposal management strategies. In line with the principles of circular economy and eco-design, in this paper an innovative methodology for the valorisation of WCO as a rejuvenating agent for bitumen 50/70 coming from Reclaimed Asphalt Pavement (RAP) is reported. In particular, WCO or hydrolysed WCO (HWCO) was modified by transesterification or amidation reactions to achieve various WCO esters and amides. All samples were characterised by nuclear magnetic resonance, melting, and boiling point. Since rejuvenating agents for RAP Cold Mix Asphalt require a melting point ≤0 °C, only WCO esters could further be tested. Efficiency of WCO esters was assessed by means of the Asphaltenes Dispersant Test and the Heithaus Parameter. In particular, bitumen blends containing 25 wt% of WCO modified with 2-phenylethyl alcohol, showed high dispersing capacity in n-heptane even after a week, compared to bitumen alone (1 h). Additionally, the Heithaus Parameter of this bitumen blend was almost three times higher than bitumen alone, further demonstrating beneficial effects deriving from the use of WCO esters as rejuvenating agents.
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Affiliation(s)
- Noemi Bardella
- Crossing S.r.l., Viale della Repubblica 193/b, 31100 Treviso, Italy;
| | - Manuela Facchin
- Department of Molecular Sciences and Nanosystems, University Ca’ Foscari of Venice, Via Torino 155, 30172 Venice, Italy (M.B.)
| | - Eleonora Fabris
- Department of Molecular Sciences and Nanosystems, University Ca’ Foscari of Venice, Via Torino 155, 30172 Venice, Italy (M.B.)
| | - Matteo Baldan
- Department of Molecular Sciences and Nanosystems, University Ca’ Foscari of Venice, Via Torino 155, 30172 Venice, Italy (M.B.)
| | - Valentina Beghetto
- Crossing S.r.l., Viale della Repubblica 193/b, 31100 Treviso, Italy;
- Department of Molecular Sciences and Nanosystems, University Ca’ Foscari of Venice, Via Torino 155, 30172 Venice, Italy (M.B.)
- Consorzio Interuniversitario per le Reattività Chimiche e la Catalisi (CIRCC), Via C. Ulpiani 27, 70126 Bari, Italy
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3
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Facchin M, Gatto V, Samiolo R, Conca S, Santandrea D, Beghetto V. May 1,3,5-Triazine derivatives be the future of leather tanning? A critical review. Environ Pollut 2024; 345:123472. [PMID: 38320686 DOI: 10.1016/j.envpol.2024.123472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/03/2024] [Accepted: 01/30/2024] [Indexed: 02/13/2024]
Abstract
Leather is produced by a multi-step process among which the tanning phase is the most relevant, transforming animal skin collagen into a stable, non-putrescible material used to produce a variety of different goods, for the footwear, automotive, garments, and sports industry. Most of the leather produced today is tanned with chromium (III) salts or alternatively with aldehydes or synthetic tannins, generating high environmental concern. Over the years, high exhaustion tanning systems have been developed to reduce the environmental impact of chromium salts, which nevertheless do not avoid the use of metals. Chrome-free alternatives such as aldehydes and phenol based synthetic tannins, are suffering from Reach restrictions due to their toxicity. Thus, the need for environmentally benign and economically sustainable tanning agents is increasingly urgent. In this review, the synthesis, use and tanning mechanism of a new class of tanning agents, 1,3,5-triazines derivatives, have been reported together with organoleptic, physical mechanical characteristics of tanned leather produced. Additionally environmental performance and economic data available for 1,3,5-triazines have been compared with those of a standard basic chromium sulphate tanning process, evidencing the high potentiality for sustainable, metal, aldehyde, and phenol free leather manufacturing.
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Affiliation(s)
- Manuela Facchin
- Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, Via Torino 155, 30172, Mestre, Italy
| | - Vanessa Gatto
- Crossing S.r.l., Viale della Repubblica 193/b, 31100, Treviso, Italy
| | - Riccardo Samiolo
- Crossing S.r.l., Viale della Repubblica 193/b, 31100, Treviso, Italy
| | - Silvia Conca
- Crossing S.r.l., Viale della Repubblica 193/b, 31100, Treviso, Italy
| | - Domenico Santandrea
- Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, Via Torino 155, 30172, Mestre, Italy
| | - Valentina Beghetto
- Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, Via Torino 155, 30172, Mestre, Italy; Crossing S.r.l., Viale della Repubblica 193/b, 31100, Treviso, Italy; Consorzio Interuniversitario per le Reattività Chimiche e La Catalisi (CIRCC), Via C. Ulpiani 27, 70126, Bari, Italy.
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Beghetto V, Gatto V, Samiolo R, Scolaro C, Brahimi S, Facchin M, Visco A. Plastics today: Key challenges and EU strategies towards carbon neutrality: A review. Environ Pollut 2023; 334:122102. [PMID: 37414120 DOI: 10.1016/j.envpol.2023.122102] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/14/2023] [Accepted: 06/22/2023] [Indexed: 07/08/2023]
Abstract
Never as today the need for collaborative interactions between industry, the scientific community, NGOs, policy makers and citizens has become crucial for the development of shared political choices and protection of the environment, for the safeguard of future generations. The complex socio-economic and environmental interconnections that underlie the EU strategy of the last years, within the framework of the Agenda 2030 and the green deal, often create perplexity and confusion that make difficult to outline the definition of a common path to achieve carbon neutrality and "net zero emissions" by 2050. Scope of this work is to give a general overview of EU policies, directives, regulations, and laws concerning polymers and plastic manufacturing, aiming to reduce plastic pollution, allowing for a better understanding of the implications that environmental concern and protection may generate from a social-economical point of view.
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Affiliation(s)
- Valentina Beghetto
- Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, Via Torino 155, 30172, Mestre, Italy; Crossing S.r.l., Viale della Repubblica 193/b, 31100, Treviso, Italy; Consorzio Interuniversitario per le Reattività Chimiche e La Catalisi (CIRCC), Via C. Ulpiani 27, 70126, Bari, Italy.
| | - Vanessa Gatto
- Crossing S.r.l., Viale della Repubblica 193/b, 31100, Treviso, Italy
| | - Riccardo Samiolo
- Crossing S.r.l., Viale della Repubblica 193/b, 31100, Treviso, Italy
| | - Cristina Scolaro
- Department of Engineering, University of Messina, C.da Di Dio, 98166, Messina, Italy
| | - Salim Brahimi
- Department of Engineering, University of Messina, C.da Di Dio, 98166, Messina, Italy
| | - Manuela Facchin
- Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, Via Torino 155, 30172, Mestre, Italy
| | - Annamaria Visco
- Department of Engineering, University of Messina, C.da Di Dio, 98166, Messina, Italy; Institute for Polymers, Composites and Biomaterials - CNR IPCB, Via Paolo Gaifami 18, 9-95126, Catania, Italy
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5
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Visco A, Scolaro C, Facchin M, Brahimi S, Belhamdi H, Gatto V, Beghetto V. Agri-Food Wastes for Bioplastics: European Prospective on Possible Applications in Their Second Life for a Circular Economy. Polymers (Basel) 2022; 14:2752. [PMID: 35808796 PMCID: PMC9268966 DOI: 10.3390/polym14132752] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/22/2022] [Accepted: 06/28/2022] [Indexed: 02/08/2023] Open
Abstract
Agri-food wastes (such as brewer's spent grain, olive pomace, residual pulp from fruit juice production, etc.) are produced annually in very high quantities posing a serious problem, both environmentally and economically. These wastes can be used as secondary starting materials to produce value-added goods within the principles of the circular economy. In this context, this review focuses on the use of agri-food wastes either to produce building blocks for bioplastics manufacturing or biofillers to be mixed with other bioplastics. The pros and cons of the literature analysis have been highlighted, together with the main aspects related to the production of bioplastics, their use and recycling. The high number of European Union (EU)-funded projects for the valorisation of agri-food waste with the best European practices for this industrial sector confirm a growing interest in safeguarding our planet from environmental pollution. However, problems such as the correct labelling and separation of bioplastics from fossil ones remain open and to be optimised, with the possibility of reuse before final composting and selective recovery of biomass.
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Affiliation(s)
- Annamaria Visco
- Department of Engineering, University of Messina, C.da Di Dio, 98166 Messina, Italy; (C.S.); (S.B.); (H.B.)
- Institute for Polymers, Composites and Biomaterials-CNR IPCB, Via Paolo Gaifami 18, 95126 Catania, Italy
| | - Cristina Scolaro
- Department of Engineering, University of Messina, C.da Di Dio, 98166 Messina, Italy; (C.S.); (S.B.); (H.B.)
| | - Manuela Facchin
- Department of Molecular Sciences and Nanosystems, University Ca’ Foscari of Venice, Via Torino 155, 30172 Mestre, Italy;
| | - Salim Brahimi
- Department of Engineering, University of Messina, C.da Di Dio, 98166 Messina, Italy; (C.S.); (S.B.); (H.B.)
| | - Hossem Belhamdi
- Department of Engineering, University of Messina, C.da Di Dio, 98166 Messina, Italy; (C.S.); (S.B.); (H.B.)
| | - Vanessa Gatto
- Crossing S.r.l., Viale della Repubblica 193/b, 31100 Treviso, Italy;
| | - Valentina Beghetto
- Department of Molecular Sciences and Nanosystems, University Ca’ Foscari of Venice, Via Torino 155, 30172 Mestre, Italy;
- Crossing S.r.l., Viale della Repubblica 193/b, 31100 Treviso, Italy;
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6
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Beghetto V, Sole R, Buranello C, Al-Abkal M, Facchin M. Recent Advancements in Plastic Packaging Recycling: A Mini-Review. Materials (Basel) 2021; 14:4782. [PMID: 34500870 PMCID: PMC8432502 DOI: 10.3390/ma14174782] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/12/2021] [Accepted: 08/19/2021] [Indexed: 01/11/2023]
Abstract
Today, the scientific community is facing crucial challenges in delivering a healthier world for future generations. Among these, the quest for circular and sustainable approaches for plastic recycling is one of the most demanding for several reasons. Indeed, the massive use of plastic materials over the last century has generated large amounts of long-lasting waste, which, for much time, has not been object of adequate recovery and disposal politics. Most of this waste is generated by packaging materials. Nevertheless, in the last decade, a new trend imposed by environmental concerns brought this topic under the magnifying glass, as testified by the increasing number of related publications. Several methods have been proposed for the recycling of polymeric plastic materials based on chemical or mechanical methods. A panorama of the most promising studies related to the recycling of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polystyrene (PS) is given within this review.
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Affiliation(s)
- Valentina Beghetto
- Department of Molecular Sciences and Nanosystems, University Ca’Foscari of Venice, Via Torino 155, 30172 Mestre, Italy; (R.S.); (C.B.); (M.A.-A.); (M.F.)
- Crossing S.r.l., Viale della Repubblica 193/b, 31100 Treviso, Italy
| | - Roberto Sole
- Department of Molecular Sciences and Nanosystems, University Ca’Foscari of Venice, Via Torino 155, 30172 Mestre, Italy; (R.S.); (C.B.); (M.A.-A.); (M.F.)
| | - Chiara Buranello
- Department of Molecular Sciences and Nanosystems, University Ca’Foscari of Venice, Via Torino 155, 30172 Mestre, Italy; (R.S.); (C.B.); (M.A.-A.); (M.F.)
| | - Marco Al-Abkal
- Department of Molecular Sciences and Nanosystems, University Ca’Foscari of Venice, Via Torino 155, 30172 Mestre, Italy; (R.S.); (C.B.); (M.A.-A.); (M.F.)
| | - Manuela Facchin
- Department of Molecular Sciences and Nanosystems, University Ca’Foscari of Venice, Via Torino 155, 30172 Mestre, Italy; (R.S.); (C.B.); (M.A.-A.); (M.F.)
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Cailotto S, Amadio E, Facchin M, Selva M, Pontoglio E, Rizzolio F, Riello P, Toffoli G, Benedetti A, Perosa A. Carbon Dots from Sugars and Ascorbic Acid: Role of the Precursors on Morphology, Properties, Toxicity, and Drug Uptake. ACS Med Chem Lett 2018; 9:832-837. [PMID: 30128076 PMCID: PMC6088351 DOI: 10.1021/acsmedchemlett.8b00240] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [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: 05/25/2018] [Accepted: 07/16/2018] [Indexed: 11/28/2022] Open
Abstract
There is the need for reproducible, simple, high-yielding synthetic protocols aimed at obtaining carbon dots (CDs) with controlled fluorescence, photothermal and photochemical behavior, surface properties, biocompatibility, tumor targeting ability, drug absorption biodistribution, and tumor uptake. This Letter describes a systematic study on the effect of glucose, fructose, and ascorbic acid as starting materials for the preparation of highly luminescent CDs, characterized by a blue emission. Their composition and morphology are investigated by titration of OH surface groups, spectroscopic techniques, and high-resolution transmission electron microscopy (HR-TEM), and their toxicity was tested toward HeLa cells. CDs made using fructose were toxic, while those made from glucose and ascorbic acid showed good biocompatibility. The reproducible and simple synthetic procedure yields luminescent biomass-derived CDs for combined cancer therapy and diagnostics. Their doxorubicin (DOX) drug uptake was measured by spectrofluorimetry, indicating a crucial role of the morphologies of the CDs in controlling DOX loading. The glucose derived CDs showed up to 28% w/w of DOX loading.
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Affiliation(s)
- Simone Cailotto
- Department
of Molecular Sciences and Nanosystems, Università
Ca’ Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Emanuele Amadio
- Department
of Molecular Sciences and Nanosystems, Università
Ca’ Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Manuela Facchin
- Department
of Molecular Sciences and Nanosystems, Università
Ca’ Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Maurizio Selva
- Department
of Molecular Sciences and Nanosystems, Università
Ca’ Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Enrico Pontoglio
- Department
of Molecular Sciences and Nanosystems, Università
Ca’ Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Flavio Rizzolio
- Department
of Molecular Sciences and Nanosystems, Università
Ca’ Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, Italy
- Experimental
and Clinical Pharmacology Unit, C.R.O. National
Cancer Institute, 33081 Aviano, Italy
| | - Pietro Riello
- Department
of Molecular Sciences and Nanosystems, Università
Ca’ Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Giuseppe Toffoli
- Experimental
and Clinical Pharmacology Unit, C.R.O. National
Cancer Institute, 33081 Aviano, Italy
| | - Alvise Benedetti
- Department
of Molecular Sciences and Nanosystems, Università
Ca’ Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Alvise Perosa
- Department
of Molecular Sciences and Nanosystems, Università
Ca’ Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, Italy
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Facchin M, Scarso A, Selva M, Perosa A, Riello P. Towards life in hydrocarbons: aggregation behaviour of “reverse” surfactants in cyclohexane. RSC Adv 2017. [DOI: 10.1039/c7ra01027c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Unconventional life forms based on membranes able to self-assemble in hydrocarbons instead of water might exist in the hydrocarbon-rich environment of Titan. We present evidence of the self-assembly of reverse surfactants to yield typical micelles in a hydrocarbon solvent.
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Affiliation(s)
- M. Facchin
- Dipartimento di Scienze Molecolari e Nanosistemi
- Laboratorio di Sistemi Chimici Complessi
- Università Ca' Foscari Venezia
- 30172 Venezia Mestre
- Italy
| | - A. Scarso
- Dipartimento di Scienze Molecolari e Nanosistemi
- Laboratorio di Sistemi Chimici Complessi
- Università Ca' Foscari Venezia
- 30172 Venezia Mestre
- Italy
| | - M. Selva
- Dipartimento di Scienze Molecolari e Nanosistemi
- Laboratorio di Sistemi Chimici Complessi
- Università Ca' Foscari Venezia
- 30172 Venezia Mestre
- Italy
| | - A. Perosa
- Dipartimento di Scienze Molecolari e Nanosistemi
- Laboratorio di Sistemi Chimici Complessi
- Università Ca' Foscari Venezia
- 30172 Venezia Mestre
- Italy
| | - P. Riello
- Dipartimento di Scienze Molecolari e Nanosistemi
- Laboratorio di Sistemi Chimici Complessi
- Università Ca' Foscari Venezia
- 30172 Venezia Mestre
- Italy
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Malba CM, Enrichi F, Facchin M, Demitri N, Plaisier JR, Natile MM, Selva M, Riello P, Perosa A, Benedetti A. Phosphonium-based tetrakis dibenzoylmethane Eu(iii) and Sm(iii) complexes: synthesis, crystal structure and photoluminescence properties in a weakly coordinating phosphonium ionic liquid. RSC Adv 2015. [DOI: 10.1039/c5ra03947a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Luminescent anionic β-diketonate complexes of formula [P8,8,8,1][Ln(dbm)4], (Ln = Eu3+ and Sm3+, [P8,8,8,1] = trioctylmethylphosphonium and dbm = 1,3-diphenylpropane-1,3-dione) were synthesized, characterized and their photoluminescence properties studied.
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10
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Facchin M, Mojoli M, Covolo E, Tarantini G. The SAPIEN 3 valve: lights and shadows. Minerva Med 2014; 105:497-500. [PMID: 25283260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Transcatheter aortic valve implantation (TAVI) has become an accepted alternative treatment option for high-risk or inoperable patients with symptomatic severe aortic stenosis. The future challenge for TAVI devices is to ensure results in terms of safety and efficacy that may justify an eligibility extension for this procedure to patients at intermediate and low risk for surgery. The ideal aortic valve prosthesis should be durable, with optimal hemodynamic performance and able to reduce the current major complications of TAVI procedure, in particular vascular complications (not infrequent with the transfemoral access route), paravalvular leaks, stroke and atrioventricular block requiring a permanent pacemaker. The SAPIEN 3™ (S3) (Edwards Lifesciences, Irvine, CA, USA) is the last Edwards family's transcatheter heart valves and incorporates a number of new and enhanced features intended to reduce the risk of vascular injury and paravalvular regurgitation, and to facilitate rapid and accurate positioning and implantation. The first data on S3 (SAPIEN3 trial) were presented at the EuroPCR 2014 and confirmed the advantage of the S3 compared with the previous Edwards valves (SAPIEN and SAPIEN XT) in terms of prevention of vascular complications and of moderate-severe paravalvular leaks, but showed an increase in the need of a permanent pacemaker post-TAVR. The S3 is certainly a promising evolution of transcatheter valves which may effectively reduce the risk of vascular complications and paravalvular leak. However, the S3 seems to be related to an increased risk of atrioventricular block, even if this complication could be due to the need to implant the valve in a higher position compared to previous models.
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Affiliation(s)
- M Facchin
- Department of Cardiac Thoracic and Vascular Sciences University of Padua Medical School, Padua, Italy -
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11
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Rossetto V, Dabrilli P, Spiezia L, Campello E, Gavasso S, Facchin M, Simioni P. P32 Endogenous thrombin potential (ETP) in 22 pregnant women. Thromb Res 2009. [DOI: 10.1016/s0049-3848(09)70077-5] [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: 10/21/2022]
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Angiolella L, Facchin M, Stringaro A, Maras B, Simonetti N, Cassone A. Identification of a glucan-associated enolase as a main cell wall protein of Candida albicans and an indirect target of lipopeptide antimycotics. J Infect Dis 1996; 173:684-90. [PMID: 8627033 DOI: 10.1093/infdis/173.3.684] [Citation(s) in RCA: 106] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Growth-subinhibitory nonlytic doses of cilofungin (lipopeptide antibiotic affecting (1,3)-beta-D-glucan synthesis) inhibited the incorporation of 46- to 48-kDa glucan-associated (46K) protein into the growing cell wall of Candida albicans. The purified 46K protein constituent strongly reacted with a monoclonal antibody against enolase, a major cytoplasmic enzyme of the fungus. In addition, two internal fragments of 12- and 15-amino acid residues from a tryptic digest of 46K protein showed 100% identity with amino acids in positions 34-45 and 66-80 of enolase. By immunoelectron microscopy with polyclonal and monoclonal anti-enolase antibodies, the 46K protein was clearly detected in the inner layers of the fungal cell wall. Thus, consistent with the proposed immunogenic and diagnostic roles of enolase in candidiasis, biochemical, immunochemical, and ultrastructural evidence strongly suggest that the cilofungin-susceptible 46K protein is a cell wall-associated form of this enzyme.
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Affiliation(s)
- L Angiolella
- Department of Bacteriology and Medical Myocology, Instituto Superiore di Sanità, Rome, Italy
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Angiolella L, Facchin M, Simonetti N, Cassone A. The activity of cilofungin on the incorporation of glucan associated proteins into hyphal cells of Candida albicans. J Chemother 1995; 7:83-9. [PMID: 7666125 DOI: 10.1179/joc.1995.7.2.83] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The effect of the cilofungin, a beta 1-3 glucan synthase inhibitor, on the incorporation of the glucan associated proteins (GAP) into the mycelial wall of Candida albicans was investigated. For this study sub-inhibitory (< 2 micrograms/ml) doses of cilofungin were employed during the yeast to mycelial transition in a defined chemical medium, at 37 degrees C for 24 hours. Under these conditions, and particularly at the dose of 0.50 micrograms/ml cilofungin exerted a marked effect on GAP incorporation into the mycelial cell wall. The changes were essentially the absence of the two prominent bands of 46 and 31 kDa of the untreated cell wall coupled with an apparent increase in the amount of 55-56 kDa constituent, as well as of a minor constituent of 27-28 kDa. Radiolabel incorporation experiments demonstrated increased synthesis of a 34 kDa GAP, in addition to confirming the absence of the 46 kDa constituent, in mycelial cells under cilofunging treatment. Thus, sub-inhibitory doses of cilofungin may greatly alter the pattern of essential cell wall constituents such as the glucan-associated proteins, suggesting that this drug also has important effects on cell wall structure and fine organization, independent of, or prior to, its principal lytic effect on the fungal organism.
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Affiliation(s)
- L Angiolella
- Istituto di Microbiologia, Facoltà di Farmacia, Università La Sapienza, Roma, Italy
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Abstract
A technique is described which simplifies intracorporeal knot-tying during laparoscopic surgery. The technique is applicable to both novice and experienced laparoscopic surgeons, and has ergonomic, cost and safety advantages over previously reported methods.
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Affiliation(s)
- M Facchin
- Department of Surgery, Queen Elizabeth Hospital, Woodville, South Australia
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