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Mazzei C, Crescitelli M, Fioramanti D, Quagliarini A, Reale A, Brunetti F. Technical-economic analysis to identify the acceptable maximum attenuation on PON FTTH lines for wholesale network operators. Sci Rep 2023; 13:12327. [PMID: 37516776 PMCID: PMC10387096 DOI: 10.1038/s41598-023-39445-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 07/25/2023] [Indexed: 07/31/2023] Open
Abstract
Telecommunications companies are constantly chasing continuous technological advances with their management methods of Operations & Maintenance (O&M) that still struggle to turn their eye toward innovation and simplification of processes. In a future that aims at fully fiber-optic networks, the objective of the research is to propose guidelines and provide data to support the Wholesale Operator for the definition of the acceptable attenuation threshold on the Passive Optical Network Fiber-To-The-Home (PON FTTH) infrastructure to determine the Service Level Agreements (SLA) to be contracted with Retail Operators. Following exceeding the threshold, the Retail Operator has the right to open a Trouble Ticket to request the resolution of the anomaly. Consequently, the definition of the attenuation threshold strongly affects the number of Trouble Tickets to be managed and the related costs the Wholesale Operator bears. This paper analyzes a specific case of the PON FTTH network of the Italian wholesale operator Open Fiber. The studied infrastructure, with a length of 11 km, allows a maximum attenuation of 37 dB without degrading the service. An economic model has been proposed to assess the cost impact of moving the attenuation threshold in the SLA.
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Affiliation(s)
- Claudio Mazzei
- Università degli Studi di Roma "Tor Vergata", 1 Via del Politecnico, 00133, Rome, Italy.
| | | | | | | | - Andrea Reale
- Università degli Studi di Roma "Tor Vergata", 1 Via del Politecnico, 00133, Rome, Italy
| | - Francesca Brunetti
- Università degli Studi di Roma "Tor Vergata", 1 Via del Politecnico, 00133, Rome, Italy
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2
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Artini C, Pennelli G, Graziosi P, Li Z, Neophytou N, Melis C, Colombo L, Isotta E, Lohani K, Scardi P, Castellero A, Baricco M, Palumbo M, Casassa S, Maschio L, Pani M, Latronico G, Mele P, Di Benedetto F, Contento G, De Riccardis MF, Fucci R, Palazzo B, Rizzo A, Demontis V, Prete D, Isram M, Rossella F, Ferrario A, Miozzo A, Boldrini S, Dimaggio E, Franzini M, Galliano S, Barolo C, Mardi S, Reale A, Lorenzi B, Narducci D, Trifiletti V, Milita S, Bellucci A, Trucchi DM. Roadmap on thermoelectricity. Nanotechnology 2023; 34. [PMID: 37019100 DOI: 10.1088/1361-6528/acca88] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 04/05/2023] [Indexed: 05/10/2023]
Abstract
The increasing energy demand and the ever more pressing need for clean technologies of energy conversion pose one of the most urgent and complicated issues of our age. Thermoelectricity, namely the direct conversion of waste heat into electricity, is a promising technique based on a long-standing physical phenomenon, which still has not fully developed its potential, mainly due to the low efficiency of the process. In order to improve the thermoelectric performance, a huge effort is being made by physicists, materials scientists and engineers, with the primary aims of better understanding the fundamental issues ruling the improvement of the thermoelectric figure of merit, and finally building the most efficient thermoelectric devices. In this Roadmap an overview is given about the most recent experimental and computational results obtained within the Italian research community on the optimization of composition and morphology of some thermoelectric materials, as well as on the design of thermoelectric and hybrid thermoelectric/photovoltaic devices.
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Affiliation(s)
- Cristina Artini
- DCCI, Department of Chemistry and Industrial Chemistry, University of Genova, Via Dodecaneso 31, I-16146 Genova, Italy
- Institute of Condensed Matter Chemistry and Technologies for Energy, National Research Council, CNR-ICMATE, Via De Marini 6, I-16149 Genova, Italy
| | - Giovanni Pennelli
- Dipartimento di Ingegneria dell'Informazione, University of Pisa, Via Caruso 16, I-56122 Pisa, Italy
| | - Patrizio Graziosi
- CNR-ISMN, v. Gobetti 101, I-40129, Bologna, Italy
- University of Warwick, School of Engineering, Coventry, CV4 7AL, United Kingdom
| | - Zhen Li
- University of Warwick, School of Engineering, Coventry, CV4 7AL, United Kingdom
| | - Neophytos Neophytou
- University of Warwick, School of Engineering, Coventry, CV4 7AL, United Kingdom
| | - Claudio Melis
- Department of Physics, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato (CA), Italy
| | - Luciano Colombo
- Department of Physics, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato (CA), Italy
| | - Eleonora Isotta
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Italy
- Department of Chemical Engineering and Materials Science, Michigan State University, United States of America
| | - Ketan Lohani
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Italy
| | - Paolo Scardi
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Italy
| | - Alberto Castellero
- Department of Chemistry, NIS, INSTM, University of Turin, Italy
- CNR-ICMATE, Corso Stati Uniti 4, I-35127 Padova, Italy
| | | | - Mauro Palumbo
- Department of Chemistry, NIS, INSTM, University of Turin, Italy
| | - Silvia Casassa
- Department of Chemistry, NIS, INSTM, University of Turin, Italy
| | - Lorenzo Maschio
- Department of Chemistry, NIS, INSTM, University of Turin, Italy
| | - Marcella Pani
- DCCI, Department of Chemistry and Industrial Chemistry, University of Genova, Via Dodecaneso 31, I-16146 Genova, Italy
- CNR-SPIN Genova, Corso Perrone 24, I-16152 Genova, Italy
| | - Giovanna Latronico
- Shibaura Institute of Technology, Omiya Campus, 307 Fukasaku, Minuma-ku, Saitama City, Saitama 337-8570, Japan
| | - Paolo Mele
- Shibaura Institute of Technology, Omiya Campus, 307 Fukasaku, Minuma-ku, Saitama City, Saitama 337-8570, Japan
| | - Francesca Di Benedetto
- ENEA-Italian National Agency for New Technologies, Energy and the Sustainable Economic Development, SSPT-PROMAS-MATAS Brindisi Research Centre S.S. 7 - Km I-706 72100 Brindisi, Italy
| | - Gaetano Contento
- ENEA-Italian National Agency for New Technologies, Energy and the Sustainable Economic Development, SSPT-PROMAS-MATAS Brindisi Research Centre S.S. 7 - Km I-706 72100 Brindisi, Italy
| | - Maria Federica De Riccardis
- ENEA-Italian National Agency for New Technologies, Energy and the Sustainable Economic Development, SSPT-PROMAS-MATAS Brindisi Research Centre S.S. 7 - Km I-706 72100 Brindisi, Italy
| | - Raffaele Fucci
- ENEA-Italian National Agency for New Technologies, Energy and the Sustainable Economic Development, SSPT-PROMAS-MATAS Brindisi Research Centre S.S. 7 - Km I-706 72100 Brindisi, Italy
| | - Barbara Palazzo
- ENEA-Italian National Agency for New Technologies, Energy and the Sustainable Economic Development, SSPT-PROMAS-MATAS Brindisi Research Centre S.S. 7 - Km I-706 72100 Brindisi, Italy
| | - Antonella Rizzo
- ENEA-Italian National Agency for New Technologies, Energy and the Sustainable Economic Development, SSPT-PROMAS-MATAS Brindisi Research Centre S.S. 7 - Km I-706 72100 Brindisi, Italy
| | - Valeria Demontis
- Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, I-56127, Pisa, Italy
| | - Domenic Prete
- Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, I-56127, Pisa, Italy
| | - Muhammad Isram
- Dipartimento di Scienze Fisiche Informatiche e Matematiche, University of Modena and Reggio Emilia, via G. Campi 213/A, I-41125, Modena, Italy
| | - Francesco Rossella
- Dipartimento di Scienze Fisiche Informatiche e Matematiche, University of Modena and Reggio Emilia, via G. Campi 213/A, I-41125, Modena, Italy
| | | | - Alvise Miozzo
- CNR-ICMATE, Corso Stati Uniti 4, I-35127 Padova, Italy
| | | | - Elisabetta Dimaggio
- Dipartimento di Ingegneria dell'Informazione, University of Pisa, Via Caruso 16, I-56122 Pisa, Italy
| | - Marcello Franzini
- Department of Chemistry, NIS Interdepartmental Centre and INSTM Reference Centre, Università degli Studi di Torino, Via Gioacchino Quarello 15A, Torino I-10135, Italy
| | - Simone Galliano
- Department of Agricultural, Forest and Food Science, INSTM Reference Centre, Università degli Studi di Torino, Largo Paolo Braccini 2, Grugliasco I-10095, Italy
| | - Claudia Barolo
- Department of Chemistry, NIS Interdepartmental Centre and INSTM Reference Centre, Università degli Studi di Torino, Via Gioacchino Quarello 15A, Torino I-10135, Italy
| | - Saeed Mardi
- CHOSE - Centre for Hybrid and Organic Solar Energy and Department of Electronic Engineering, University of Rome Tor Vergata, I-00133 Rome, Italy
- Laboratory of Organic Electronics (LOE) Department of Science and Technology, University of Linköping, Bredgatan 34, Norrkoping 581 83, Sweden
| | - Andrea Reale
- CHOSE - Centre for Hybrid and Organic Solar Energy and Department of Electronic Engineering, University of Rome Tor Vergata, I-00133 Rome, Italy
| | - Bruno Lorenzi
- Department of Materials Science-University of Milano Bicocca, Via R. Cozzi 55, I-20125-Milano, Italy
| | - Dario Narducci
- Department of Materials Science-University of Milano Bicocca, Via R. Cozzi 55, I-20125-Milano, Italy
| | - Vanira Trifiletti
- Department of Materials Science and Solar Energy Research Center (MIB-SOLAR), University of Milano-Bicocca, Via Cozzi 55, I-20125 Milan, Italy
| | - Silvia Milita
- Institute for Microelectronics and Microsystems (CNR-IMM), Via Piero Gobetti 101, I-40129 Bologna, Italy
| | - Alessandro Bellucci
- Istituto di Struttura della Materia (ISM-CNR), DiaTHEMA Lab, Montelibretti Unit, Via Salaria km 29.300, 00015 Monterotondo (RM), Italy
| | - Daniele M Trucchi
- Istituto di Struttura della Materia (ISM-CNR), DiaTHEMA Lab, Montelibretti Unit, Via Salaria km 29.300, 00015 Monterotondo (RM), Italy
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Dianetti M, Susanna G, Calabrò E, Polino G, Otto M, Neumaier D, Reale A, Brunetti F. Graphene with Ni-Grid as Semitransparent Electrode for Bulk Heterojunction Solar Cells (BHJ-SCs). Polymers (Basel) 2022; 14:polym14051046. [PMID: 35267869 PMCID: PMC8915009 DOI: 10.3390/polym14051046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/22/2022] [Accepted: 02/25/2022] [Indexed: 12/10/2022] Open
Abstract
In this work, we present the fabrication and characterization of bulk-heterojunction solar cells on monolayer graphene (MLG) with nickel-grids (Ni-grid) as semitransparent conductive electrode. The electrodes showed a maximum transmittance of 90% (calculated in 300–800 nm range) and a sheet resistance down to 35 Ω/□. On these new anodes, we fabricated TCO free BHJ-SCs using PTB7 blended with PC70BM fullerene derivative as active layer. The best device exhibited a power conversion efficiency (PCE) of 4.2% in direct configuration and 3.6% in inverted configuration. The reference solar cell, realized on the ITO glass substrate, achieved a PCE of 6.1% and 6.7% in direct and inverted configuration respectively; for comparison we also tested OSCs only with simple Ni-grid as semitransparent and conductive electrode, obtaining a low PCE of 0.7%. The proposed approach to realize graphene-based electrodes could be a possible route to reduce the overall impact of the sheet resistance of this type of electrodes allowing their use in several optoelectronic devices.
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Affiliation(s)
- Martina Dianetti
- Department of Electronic Engineering, University of Rome Tor Vergata—CHOSE, Via del Politecnico 1, 00133 Rome, Italy; (M.D.); (G.S.); (E.C.); (G.P.); (A.R.)
| | - Gianpaolo Susanna
- Department of Electronic Engineering, University of Rome Tor Vergata—CHOSE, Via del Politecnico 1, 00133 Rome, Italy; (M.D.); (G.S.); (E.C.); (G.P.); (A.R.)
- ISCTI—Istituto Superiore delle Comunicazioni e delle Tecnologie dell’Informazione-Ministero dello Sviluppo Economico, Viale America 201, 00144 Rome, Italy
| | - Emanuele Calabrò
- Department of Electronic Engineering, University of Rome Tor Vergata—CHOSE, Via del Politecnico 1, 00133 Rome, Italy; (M.D.); (G.S.); (E.C.); (G.P.); (A.R.)
| | - Giuseppina Polino
- Department of Electronic Engineering, University of Rome Tor Vergata—CHOSE, Via del Politecnico 1, 00133 Rome, Italy; (M.D.); (G.S.); (E.C.); (G.P.); (A.R.)
| | - Martin Otto
- Gesellschaft für Angewandte Mikro-und Optoelektronic mBH—AMO GmBH, Otto-Blumenthal-Straße 25, 52074 Aachen, Germany; (M.O.); (D.N.)
| | - Daniel Neumaier
- Gesellschaft für Angewandte Mikro-und Optoelektronic mBH—AMO GmBH, Otto-Blumenthal-Straße 25, 52074 Aachen, Germany; (M.O.); (D.N.)
- Chair of Smart Sensor Systems, Bergische University of Wuppertal, 42119 Wuppertal, Germany
| | - Andrea Reale
- Department of Electronic Engineering, University of Rome Tor Vergata—CHOSE, Via del Politecnico 1, 00133 Rome, Italy; (M.D.); (G.S.); (E.C.); (G.P.); (A.R.)
| | - Francesca Brunetti
- Department of Electronic Engineering, University of Rome Tor Vergata—CHOSE, Via del Politecnico 1, 00133 Rome, Italy; (M.D.); (G.S.); (E.C.); (G.P.); (A.R.)
- Correspondence: ; Tel.: +39-06-7259-7366
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4
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Marano M, Rossi F, Ravà L, Khalil Ramla M, Pisani M, Bottari G, Genuini L, Zampini G, Nunziata J, Reale A, Barbieri MA, Celeani F, Di Nardo M, Cecchetti C, Stoppa F, Villani A, Raponi M, Livadiotti S, Pontrelli G. Acute toxic exposures in children: analysis of a three year registry managed by a Pediatric poison control Center in Italy. Ital J Pediatr 2021; 47:125. [PMID: 34078407 PMCID: PMC8170623 DOI: 10.1186/s13052-021-01071-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 05/14/2021] [Indexed: 11/16/2022] Open
Abstract
Introduction Acute pediatric poisoning is an emerging health and social problem. The aim of this study is to describe the characteristics of a large pediatric cohort exposed to xenobiotics, through the analysis of a Pediatric Poison Control Center (PPCc) registry. Methods This study, conducted in the Pediatric Hospital Bambino Gesù of Rome, a reference National Pediatric Hospital, collected data of children whose parents or caregivers contacted the PPCc by phone (group “P”), or who presented to the Emergency Department (group “ED”), during the three-year period 2014–2016. Data were prospectively and systematically collected in a pre-set electronic registry. Comparisons among age groups were performed and multivariable logistic regression models used to investigate associations with outcomes (hospital referral for “P”, and hospital admission for “ED”group). Results We collected data of 1611 children on group P and 1075 on group ED. Both groups were exposed to both pharmaceutical and non-pharmaceutical agents. Pharmaceutical agent exposure increased with age and the most common route of exposure was oral. Only 10% among P group were symptomatic children, with gastrointestinal symptoms. Among the ED patients, 30% were symptomatic children mostly with gastrointestinal (55.4%) and neurologic symptoms (23.8%). Intentional exposure (abuse substance and suicide attempt), which involved 7.7% of patients, was associated with older age and Hospital admission. Conclusions Our study describes the characteristics of xenobiotics exposures in different paediatric age groups, highlighting the impact of both pharmacological and intentional exposure. Furthermore, our study shows the utility of a specific PPCc, either through Phone support or by direct access to ED. PPCc phone counselling could avoid unnecessary access to the ED, a relevant achievement, particularly in the time of a pandemic.
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Affiliation(s)
- M Marano
- DEA Paediatric Intensive Care Unit, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy. .,Paediatric Clinical Toxicology Centre, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy.
| | - F Rossi
- Emergency Department, Children's Hospital Bambino Gesù, IRCCS, Palidoro, Italy
| | - L Ravà
- Epidemiology Unit and Biostatistics, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - M Khalil Ramla
- Paediatric Clinical Toxicology Centre, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - M Pisani
- Emergency Department, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - G Bottari
- DEA Paediatric Intensive Care Unit, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - L Genuini
- DEA Paediatric Intensive Care Unit, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - G Zampini
- DEA Paediatric Intensive Care Unit, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - J Nunziata
- DEA Paediatric Intensive Care Unit, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - A Reale
- Emergency Department, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - M A Barbieri
- Emergency Department, Children's Hospital Bambino Gesù, IRCCS, Palidoro, Italy
| | - F Celeani
- Information Systems Department, General direction Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - M Di Nardo
- DEA Paediatric Intensive Care Unit, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - C Cecchetti
- DEA Paediatric Intensive Care Unit, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - F Stoppa
- DEA Paediatric Intensive Care Unit, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - A Villani
- Emergency Department, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - M Raponi
- Medical Direction, Children's Hospital Bambino Gesù, IRCCS, Rome, Italy
| | - S Livadiotti
- Clinical Trials Centre, University Department of Paediatrics, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - G Pontrelli
- Clinical Trials Centre, University Department of Paediatrics, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
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5
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Mardi S, Yusupov K, Martinez PM, Zakhidov A, Vomiero A, Reale A. Enhanced Thermoelectric Properties of Poly(3-hexylthiophene) through the Incorporation of Aligned Carbon Nanotube Forest and Chemical Treatments. ACS Omega 2021; 6:1073-1082. [PMID: 33490766 PMCID: PMC7818073 DOI: 10.1021/acsomega.0c02663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 09/04/2020] [Indexed: 06/12/2023]
Abstract
Carbon nanotube/polymer composites have recently received considerable attention for thermoelectric (TE) applications. The TE power factor can be significantly improved by forming composites with carbon nanotubes. However, the formation of a uniform and well-ordered nanocomposite film is still challenging because of the creation of agglomerates and the uneven distribution of nanotubes. Here, we developed a facile, efficient, and easy-processable route to produce uniform and aligned nanocomposite films of P3HT and carbon nanotube forest (CNTF). The electrical conductivity of a pristine P3HT film was improved from ∼10-7 to 160 S/cm thanks to the presence of CNTF. Also, a further boost in TE performance was achieved using two additives, lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) and tert-butylpyridine. By adding the additives to P3HT, the degree of interchain order increased, which facilitated the charge transport through the composite. Under the optimal conditions, the incorporation of CNTF and additives led to values of the Seebeck coefficient, electrical conductivity, and power factor up to rising 92 μV/K, 130 S/cm, and 110 μW/m K2, respectively, at a temperature of 344.15 K. The excellent TE performance of the hybrid films originates from the dramatically increased electrical conductivity and the improved Seebeck coefficient by CNTF and additives, respectively.
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Affiliation(s)
- Saeed Mardi
- Department
of Electronic Engineering, CHOSE-Centre for Hybrid and Organic Solar
Energy, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy
| | - Khabib Yusupov
- Division
of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 LuleÅ, Sweden
| | - Patricia M. Martinez
- NanoTech
Institute, University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Anvar Zakhidov
- NanoTech
Institute, University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Alberto Vomiero
- Division
of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 LuleÅ, Sweden
- Department
of Molecular Sciences and Nanosystems, Ca’
Foscari University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Andrea Reale
- Department
of Electronic Engineering, CHOSE-Centre for Hybrid and Organic Solar
Energy, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy
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Calabrò E, Matteocci F, Paci B, Cinà L, Vesce L, Barichello J, Generosi A, Reale A, Di Carlo A. Easy Strategy to Enhance Thermal Stability of Planar PSCs by Perovskite Defect Passivation and Low-Temperature Carbon-Based Electrode. ACS Appl Mater Interfaces 2020; 12:32536-32547. [PMID: 32588625 DOI: 10.1021/acsami.0c05878] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Organic-inorganic lead halide perovskite has recently emerged as an efficient absorber material for solution process photovoltaic (PV) technology, with certified efficiency exceeding 25%. The development of low-temperature (LT) processing is a challenging topic for decreasing the energy payback time of perovskite solar cell (PSC) technology. In this context, the LT planar n-i-p architecture meets all the requirements in terms of efficiency, scalability, and processability. However, the long-term stability of the LT planar PSC under heat and moisture stress conditions has not been carefully assessed. Here, a detailed study on thermal and moisture stability of large-area (1 cm2) LT planar PSCs is presented. In particular, the key role in thermal stability of potassium iodide (KI) insertion in the perovskite composition is demonstrated. It is found that defect passivation of triple-cation perovskite by KI doping inhibits the halide migration induced by thermal stress at 85 °C and delays the formation of degradation subproducts. T80, defined as the time when the cell retains 80% of initial efficiency, is evaluated both for reference undoped devices and KI-doped ones. The results show that T80 increases 3 times when KI doping is used. Moreover, an HTL-free architecture where the Au top electrode is replaced with low-T screen-printable carbon paste is proposed. The combination of the carbon-based HTL-free architecture and KI-doped perovskite permits T80 to increase from 40 to 414 h in unsealed devices.
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Affiliation(s)
- Emanuele Calabrò
- C.H.O.S.E. (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
| | - Fabio Matteocci
- C.H.O.S.E. (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
| | - Barbara Paci
- Istituto di Struttura della Materia-CNR (ISM-CNR), Area della Ricerca di Roma - Tor Vergata, Via del Fosso del Cavaliere 100, I-00133 Roma, Italy
| | - Lucio Cinà
- Cicci Research srl, via Giordania 227, Grosseto 58100, Italy
| | - Luigi Vesce
- C.H.O.S.E. (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
| | - Jessica Barichello
- C.H.O.S.E. (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
| | - Amanda Generosi
- Istituto di Struttura della Materia-CNR (ISM-CNR), Area della Ricerca di Roma - Tor Vergata, Via del Fosso del Cavaliere 100, I-00133 Roma, Italy
| | - Andrea Reale
- C.H.O.S.E. (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
| | - Aldo Di Carlo
- C.H.O.S.E. (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome Tor Vergata, Via del Politecnico 1, Rome 00133, Italy
- Istituto di Struttura della Materia-CNR (ISM-CNR), Area della Ricerca di Roma - Tor Vergata, Via del Fosso del Cavaliere 100, I-00133 Roma, Italy
- LASE - Laboratory for Advanced Solar Energy, National University of Science and Technology "MISiS", 119049 Leninskiy prosect 6, Moscow, Russia
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7
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Mardi S, Pea M, Notargiacomo A, Yaghoobi Nia N, Carlo AD, Reale A. The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene). Materials (Basel) 2020; 13:E1404. [PMID: 32204569 PMCID: PMC7142503 DOI: 10.3390/ma13061404] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/12/2020] [Accepted: 03/16/2020] [Indexed: 11/17/2022]
Abstract
Organic materials have been found to be promising candidates for low-temperature thermoelectric applications. In particular, poly (3-hexylthiophene) (P3HT) has been attracting great interest due to its desirable intrinsic properties, such as excellent solution processability, chemical and thermal stability, and high field-effect mobility. However, its poor electrical conductivity has limited its application as a thermoelectric material. It is therefore important to improve the electrical conductivity of P3HT layers. In this work, we studied how molecular weight (MW) influences the thermoelectric properties of P3HT films. The films were doped with lithium bis(trifluoromethane sulfonyl) imide salt (LiTFSI) and 4-tert butylpyridine (TBP). Various P3HT layers with different MWs ranging from 21 to 94 kDa were investigated. UV-Vis spectroscopy and atomic force microscopy (AFM) analysis were performed to investigate the morphology and structure features of thin films with different MWs. The electrical conductivity initially increased when the MW increased and then decreased at the highest MW, whereas the Seebeck coefficient had a trend of reducing as the MW grew. The maximum thermoelectric power factor (1.87 μW/mK2) was obtained for MW of 77 kDa at 333 K. At this temperature, the electrical conductivity and Seebeck coefficient of this MW were 65.5 S/m and 169 μV/K, respectively.
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Affiliation(s)
- Saeed Mardi
- Department of Electronic Engineering, CHOSE—Centre for Hybrid and Organic Solar Energy, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy; (S.M.); (N.Y.N.); (A.D.C.)
| | - Marialilia Pea
- Institute for Photonics and Nanotechnologies, CNR, 00156 Rome, Italy; (M.P.); (A.N.)
| | - Andrea Notargiacomo
- Institute for Photonics and Nanotechnologies, CNR, 00156 Rome, Italy; (M.P.); (A.N.)
| | - Narges Yaghoobi Nia
- Department of Electronic Engineering, CHOSE—Centre for Hybrid and Organic Solar Energy, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy; (S.M.); (N.Y.N.); (A.D.C.)
| | - Aldo Di Carlo
- Department of Electronic Engineering, CHOSE—Centre for Hybrid and Organic Solar Energy, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy; (S.M.); (N.Y.N.); (A.D.C.)
| | - Andrea Reale
- Department of Electronic Engineering, CHOSE—Centre for Hybrid and Organic Solar Energy, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy; (S.M.); (N.Y.N.); (A.D.C.)
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8
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Visca E, Böswirth B, Cacciotti E, Cerri V, Crescenzi F, Gallay F, Greuner H, Reale A, Richou M, Roccella S, You J, Maviglia F. Manufacturing and testing of ITER-like divertor plasma facing mock-ups for DEMO. Fusion Engineering and Design 2018. [DOI: 10.1016/j.fusengdes.2018.05.064] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Buonsenso D, Cristaldi S, Reale A, de Jacobis IT, Granata L, Marchesi A. Very Early Development and Recognition of Coronary Involvement in a Febrile Infant with Typical Signs of Kawasaki Disease. Mediterr J Hematol Infect Dis 2018; 10:e2018037. [PMID: 30002793 PMCID: PMC6039088 DOI: 10.4084/mjhid.2018.037] [Citation(s) in RCA: 1] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 05/14/2018] [Indexed: 12/19/2022] Open
Abstract
Kawasaki disease (KD) is an acute, self-limited, inflammatory disease affecting medium-sized arteries and particularly the coronary arteries in about 25% of untreated cases. KD is a clinical diagnosis based on the presence of ≥5 days of fever and the presence of ≥4 of the 5 principal clinical criteria. We described, for the first time to our knowledge, a case of a very early development (on day 1) of typical KD with transient coronary involvement, diagnosed on day 2 of disease and treated with aspirin and steroids on day 3, with complete resolution of clinical signs and coronary involvement.
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Affiliation(s)
- D Buonsenso
- Pediatric Emergency Department, Bambino Gesù Children's Hospital, Institute for Research and Health Care (IRCCS), Rome, Italy
| | - S Cristaldi
- Pediatric Emergency Department, Bambino Gesù Children's Hospital, Institute for Research and Health Care (IRCCS), Rome, Italy
| | - A Reale
- Pediatric Emergency Department, Bambino Gesù Children's Hospital, Institute for Research and Health Care (IRCCS), Rome, Italy
| | - I Tarissi de Jacobis
- Pediatric and Infectious Disease Unit, Bambino Gesù Children's Hospital, Institute for Research and Health Care (IRCCS), Rome, Italy
| | - L Granata
- Pediatric and Infectious Disease Unit, Bambino Gesù Children's Hospital, Institute for Research and Health Care (IRCCS), Rome, Italy
| | - A Marchesi
- Pediatric and Infectious Disease Unit, Bambino Gesù Children's Hospital, Institute for Research and Health Care (IRCCS), Rome, Italy
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10
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La Notte L, Villari E, Palma AL, Sacchetti A, Michela Giangregorio M, Bruno G, Di Carlo A, Bianco GV, Reale A. Laser-patterned functionalized CVD-graphene as highly transparent conductive electrodes for polymer solar cells. Nanoscale 2017; 9:62-69. [PMID: 27906382 DOI: 10.1039/c6nr06156g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A five-layer (5L) graphene on a glass substrate has been demonstrated as a transparent conductive electrode to replace indium tin oxide (ITO) in organic photovoltaic devices. The required low sheet resistance, while maintaining high transparency, and the need of a wettable surface are the main issues. To overcome these, two strategies have been applied: (i) the p-doping of the multilayer graphene, thus reaching 25 Ω□-1 or (ii) the O2-plasma oxidation of the last layer of the 5L graphene that results in a contact angle of 58° and a sheet resistance of 134 Ω□-1. A Nd:YVO4 laser patterning has been implemented to realize the desired layout of graphene through an easy and scalable way. Inverted Polymer Solar Cells (PSCs) have been fabricated onto the patterned and modified graphene. The use of PEDOT:PSS has facilitated the deposition of the electron transport layer and a non-chlorinated solvent (ortho-xylene) has been used in the processing of the active layer. It has been found that the two distinct functionalization strategies of graphene have beneficial effects on the overall performance of the devices, leading to an efficiency of 4.2%. Notably, this performance has been achieved with an active area of 10 mm2, the largest area reported in the literature for graphene-based inverted PSCs.
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Affiliation(s)
- Luca La Notte
- CHOSE (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy.
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11
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Messia M, Reale A, Maiuro L, Candigliota T, Sorrentino E, Marconi E. Effects of pre-fermented wheat bran on dough and bread characteristics. J Cereal Sci 2016. [DOI: 10.1016/j.jcs.2016.03.004] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Visca E, Roccella S, Candura D, Palermo M, Rossi P, Pizzuto A, Sanguinetti G, Mancini A, Verdini L, Cacciotti E, Cerri V, Mugnaini G, Reale A, Giacomi G. HRP facility for fabrication of ITER vertical target divertor full scale plasma facing units. Fusion Engineering and Design 2015. [DOI: 10.1016/j.fusengdes.2014.12.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Moschetta M, Reale A, Marasco C, Vacca A, Carratù MR. Therapeutic targeting of the mTOR-signalling pathway in cancer: benefits and limitations. Br J Pharmacol 2015; 171:3801-13. [PMID: 24780124 DOI: 10.1111/bph.12749] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 03/29/2014] [Accepted: 04/15/2014] [Indexed: 12/21/2022] Open
Abstract
The mammalian target of rapamycin (mTOR) plays an important role in the regulation of protein translation, cell growth and metabolism. The mTOR protein forms two distinct multi-subunit complexes: mTORC1 and mTORC2. The mTORC1 complex is activated by diverse stimuli, such as growth factors, nutrients, energy and stress signals; and essential signalling pathways, such as PI3K and MAPK, in order to control cell growth, proliferation and survival. mTORC1 also activates S6K1 and 4EBP1, which are involved in mRNA translation. The mTORC2 complex is resistant to rapamycin inhibitory activity and is generally insensitive to nutrient- and energy-dependent signals. It activates PKC-α and Akt and regulates the actin cytoskeleton. Deregulation of the mTOR-signalling pathway (PI3K amplification/mutation, PTEN loss of function, Akt overexpression, and S6K1, 4EBP1 and eIF4E overexpression) is common in cancer, and alterations in components of the mTOR pathway have a major role in tumour progression. Therefore, mTOR is an appealing therapeutic target in many tumours. Here we summarize the upstream regulators and downstream effectors of the mTORC1 and mTORC2 pathways, the role of mTOR in cancer, and the potential therapeutic values and issues related to the novel agents targeting the mTOR-signalling pathway.
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Affiliation(s)
- M Moschetta
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA; Section of Internal Medicine, Department of Biomedical Sciences and Human Oncology, University of Bari Medical School 'Aldo Moro', Bari, Italy
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14
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Zampetti A, Fallahpour AH, Dianetti M, Salamandra L, Santoni F, Gagliardi A, Auf der Maur M, Brunetti F, Reale A, Brown TM, Di Carlo A. Influence of the interface material layers and semiconductor energetic disorder on the open circuit voltage in polymer solar cells. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23685] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Andrea Zampetti
- Department of Electronic Engineering; CHOSE, Centre for Hybrid and Solar Energy, University of Rome “Tor Vergata,” Via del Politecnico 1; 00133 Rome Italy
| | - Amir Hossein Fallahpour
- Department of Electronic Engineering; CHOSE, Centre for Hybrid and Solar Energy, University of Rome “Tor Vergata,” Via del Politecnico 1; 00133 Rome Italy
| | - Martina Dianetti
- Department of Electronic Engineering; CHOSE, Centre for Hybrid and Solar Energy, University of Rome “Tor Vergata,” Via del Politecnico 1; 00133 Rome Italy
| | - Luigi Salamandra
- Department of Electronic Engineering; CHOSE, Centre for Hybrid and Solar Energy, University of Rome “Tor Vergata,” Via del Politecnico 1; 00133 Rome Italy
| | - Francesco Santoni
- Department of Electronic Engineering; CHOSE, Centre for Hybrid and Solar Energy, University of Rome “Tor Vergata,” Via del Politecnico 1; 00133 Rome Italy
| | - Alessio Gagliardi
- Technische Universität München, Electrical and Computer Engineering; Arcisstr. 21 80333 München Germany
| | - Matthias Auf der Maur
- Department of Electronic Engineering; CHOSE, Centre for Hybrid and Solar Energy, University of Rome “Tor Vergata,” Via del Politecnico 1; 00133 Rome Italy
| | - Francesca Brunetti
- Department of Electronic Engineering; CHOSE, Centre for Hybrid and Solar Energy, University of Rome “Tor Vergata,” Via del Politecnico 1; 00133 Rome Italy
| | - Andrea Reale
- Department of Electronic Engineering; CHOSE, Centre for Hybrid and Solar Energy, University of Rome “Tor Vergata,” Via del Politecnico 1; 00133 Rome Italy
| | - Thomas M. Brown
- Department of Electronic Engineering; CHOSE, Centre for Hybrid and Solar Energy, University of Rome “Tor Vergata,” Via del Politecnico 1; 00133 Rome Italy
| | - Aldo Di Carlo
- Department of Electronic Engineering; CHOSE, Centre for Hybrid and Solar Energy, University of Rome “Tor Vergata,” Via del Politecnico 1; 00133 Rome Italy
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15
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Neglia C, Argentiero A, Chitano G, Agnello N, Giolli L, Di Tanna G, Paladini D, Amati A, Marsico A, Caiaffa V, Conte P, La Selva G, Crafa S, Colì G, Ciccarese R, Vigilanza A, Distante C, Argentiero D, Pantile V, Benvenuto M, Di Renzo T, Reale A, Coppola R, Distante A, Colao A, Di Somma C, Migliore A, Auriemma R, Piscitelli P. Diabetes and Obesity as Independent Risk Factors for Osteoporosis in Postmenopausal Women: A Population Study. EUR J INFLAMM 2014. [DOI: 10.1177/1721727x1401200309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We aimed to analyze bone mineralization and the effect of different risk factors for osteoporosis in postmenopausal women. We studied 2,756 postmenopausal subjects out of ≥10,000 records from the ROIS registry in the frame of the PROF Project, a population study carried out in Salento (Taranto, Brindisi, Lecce) from 2009 to 2012. All subjects were assessed by phalangeal Quantitative Ultrasound (QUS) to evaluate their bone mineralization (assessed by Amplitude Dependent Speed of Sound, AD-SoS) and the association between demineralization and the presence of other conditions or risk factors. Mean age was 64±9.5 years and mean BMI was 28.7±3.5 Kg/m2. Pearson correlation analyses revealed a negative association between bone mineralization (AD-SoS) and BMI (P<0.001). By using multivariate logistic regression analysis, we observed significant values of Odds Ratios of osteoporosis (adjusted for age, physical activity and the use of drugs known to increase the risk of fractures) in subjects with diabetes and obesity: 1.39 (CI: 1,05–1,83) and 1.46 (CI: 1.20–1.78), respectively. A statistically significant linear trend of higher Odds Ratios of osteoporosis was found for increasing values of BMI. The percent change in the odds of vertebral fractures per single SD decrease of AD-SoS was 47% (P<0.001). Diabetes and obesity in postmenopausal women are likely to represent independent risk factors for osteoporosis. Phalangeal QUS showed a good power of predictivity in identifying subjects with vertebral fractures.
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Affiliation(s)
- C. Neglia
- Department of Biological and Environmental Science and Technology (Di.S.T.E.B.A), University of Salento, Lecce, Italy
| | - A. Argentiero
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - G. Chitano
- ISBEM (Istituto Scientifico Biomedico Euro Mediterraneo), Brindisi, Italy
| | - N. Agnello
- ISBEM (Istituto Scientifico Biomedico Euro Mediterraneo), Brindisi, Italy
| | - L. Giolli
- E-Campus University, Novedrate, Italy
| | | | - D. Paladini
- ISBEM (Istituto Scientifico Biomedico Euro Mediterraneo), Brindisi, Italy
| | - A. Amati
- Local Health Authority, ASL Taranto Taranto, Italy
| | - A. Marsico
- Local Health Authority, ASL Taranto Taranto, Italy
| | - V. Caiaffa
- Local Health Authority, ASL Taranto Taranto, Italy
| | - P. Conte
- Local Health Authority, ASL Taranto Taranto, Italy
| | - G. La Selva
- Local Health Authority, ASL Brindisi, Brindisi, Italy
| | - S. Crafa
- Local Health Authority, ASL Taranto Taranto, Italy
| | - G. Colì
- Local Health Authority, ASL Lecce, Gallipoli Hospital, Gallipoli, Italy
| | - R. Ciccarese
- ISBEM (Istituto Scientifico Biomedico Euro Mediterraneo), Brindisi, Italy
| | - A. Vigilanza
- ISBEM (Istituto Scientifico Biomedico Euro Mediterraneo), Brindisi, Italy
| | - C. Distante
- ISBEM (Istituto Scientifico Biomedico Euro Mediterraneo), Brindisi, Italy
| | - D. Argentiero
- ISBEM (Istituto Scientifico Biomedico Euro Mediterraneo), Brindisi, Italy
| | - V. Pantile
- ISBEM (Istituto Scientifico Biomedico Euro Mediterraneo), Brindisi, Italy
| | - M. Benvenuto
- ISBEM (Istituto Scientifico Biomedico Euro Mediterraneo), Brindisi, Italy
| | | | | | | | - A. Distante
- ISBEM (Istituto Scientifico Biomedico Euro Mediterraneo), Brindisi, Italy
| | - A. Colao
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | | | - A. Migliore
- Fatebenefratelli St. Peter's Hospital- Department of Rheumatology, Rome, Italy
| | - R. Auriemma
- IOS, Southern Italy Hospital Institute, Naples, Italy
- Coleman Ltd, Naples, Italy
| | - P. Piscitelli
- IOS, Southern Italy Hospital Institute, Naples, Italy
- Coleman Ltd, Naples, Italy
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16
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Agresti A, Pescetelli S, Quatela A, Mastroianni S, Brown TM, Reale A, Bignozzi CA, Caramori S, Di Carlo A. Micro-Raman analysis of reverse bias stressed dye-sensitized solar cells. RSC Adv 2014. [DOI: 10.1039/c3ra47797e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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17
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Roccella S, Cacciotti E, Candura D, Mancini A, Pizzuto A, Reale A, Tatì A, Visca E. Ultrasonic test of carbon composite/copper joints in the ITER divertor. Fusion Engineering and Design 2013. [DOI: 10.1016/j.fusengdes.2013.05.078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Reale A, Di Renzo T, Succi M, Tremonte P, Coppola R, Sorrentino E. Microbiological and Fermentative Properties of Baker's Yeast Starter Used in Breadmaking. J Food Sci 2013; 78:M1224-31. [DOI: 10.1111/1750-3841.12206] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 04/06/2013] [Indexed: 11/29/2022]
Affiliation(s)
- A. Reale
- Istituto di Scienze dell'Alimentazione C.N.R. Via Roma; 64 83100 - Avellino (Italy)
| | - T. Di Renzo
- Istituto di Scienze dell'Alimentazione C.N.R. Via Roma; 64 83100 - Avellino (Italy)
| | - M. Succi
- Dipartimento Agricoltura Ambiente Alimenti; DIAAA, Univ. degli Studi del Molise; Via De Sanctis; 86100 Campobasso (Italy)
| | - P. Tremonte
- Dipartimento Agricoltura Ambiente Alimenti; DIAAA, Univ. degli Studi del Molise; Via De Sanctis; 86100 Campobasso (Italy)
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19
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Zardetto V, De Angelis G, Vesce L, Caratto V, Mazzuca C, Gasiorowski J, Reale A, Di Carlo A, Brown TM. Formulations and processing of nanocrystalline TiO2 films for the different requirements of plastic, metal and glass dye solar cell applications. Nanotechnology 2013; 24:255401. [PMID: 23727656 DOI: 10.1088/0957-4484/24/25/255401] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We carried out a systematic study on the effect of nanocrystalline TiO2 paste formulations and temperature treatment on the performance of dye solar cells (DSCs) over a large temperature range, to provide useful information for the fabrication of both plastic and metal flexible devices. We compared conventional screen-printable and binder-free TiO2 pastes with a new formulation which includes hydroxylethyl cellulose (HEC), enabling the study of the effect of organic materials in the TiO2 layer in the whole 25-600 °C temperature range. Differently from the binder-free formulations where the device efficiency rose monotonically with temperature, the use of cellulose binders led to remarkably different trends depending on their pyrolysis and decomposition thresholds and solubility, especially at those temperatures compatible with plastic foils. Above 325 °C, where metal foil can be used as substrates, the efficiencies become similar to those of the binder-free paste due to effective binder decomposition and inter-nanoparticle bonding. Finally, we demonstrated, for the first time, that the simultaneous application of both temperature (110-150 °C) and pressure (100 MPa) can lead to a large improvement (33%) compared to the same mechanical compression method carried out at room temperature only.
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Affiliation(s)
- Valerio Zardetto
- CHOSE (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome-Tor Vergata, via del Politecnico 1, I-00133, Rome, Italy
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20
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Tagliaferro R, Colonna D, Brown TM, Reale A, Di Carlo A. Interplay between transparency and efficiency in dye sensitized solar cells. Opt Express 2013; 21:3235-42. [PMID: 23481782 DOI: 10.1364/oe.21.003235] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
In this paper we analyze the interplay between transparency and efficiency in dye sensitized solar cells by varying fabrication parameters such as the thickness of the nano-crystalline TiO(2) layer, the dye loading and the dye type. Both transparency and efficiency show a saturation trend when plotted versus dye loading. By introducing the transparency-efficiency plot, we show that the relation between transparency and efficiency is linear and is almost independent on the TiO(2) thickness for a certain thickness range. On the contrary, the relation between transparency and efficiency depends strongly on the type of the dye. Moreover, we show that co-sensitization techniques can be effectively used to access regions of the transparency-efficiency space that are forbidden for single dye sensitization. The relation found between transparency and efficiency (T&E) can be the general guide for optimization of Dye Solar Cells in building integration applications.
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Affiliation(s)
- Roberto Tagliaferro
- Centre for Hybrid and Organic Solar Energy (CHOSE), Electronic Engineering Dept. University of Rome Tor Vergata, Via del Politecnico 1, 00133, Rome Italy
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21
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Tagliaferro R, Gentilini D, Mastroianni S, Zampetti A, Gagliardi A, Brown TM, Reale A, Di Carlo A. Integrated tandem dye solar cells. RSC Adv 2013. [DOI: 10.1039/c3ra43380c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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22
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Giustini M, Angelone D, Parente M, Dini D, Decker F, Lanuti A, Reale A, Brown T, di Carlo A. Emission spectra and transient photovoltage in dye-sensitized solar cells under stress tests. J APPL ELECTROCHEM 2012. [DOI: 10.1007/s10800-012-0484-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Mastroianni S, Lembo A, Brown TM, Reale A, Di Carlo A. Inside Cover: Electrochemistry in Reverse Biased Dye Solar Cells and Dye/Electrolyte Degradation Mechanisms (ChemPhysChem 12/2012). Chemphyschem 2012. [DOI: 10.1002/cphc.201290057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Mastroianni S, Lanuti A, Penna S, Reale A, Brown TM, Di Carlo A, Decker F. Physical and Electrochemical Analysis of an Indoor-Outdoor Ageing Test of Large-Area Dye Solar Cell Devices. Chemphyschem 2012; 13:2925-36. [DOI: 10.1002/cphc.201200110] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 06/25/2012] [Indexed: 11/11/2022]
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25
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Mastroianni S, Lembo A, Brown TM, Reale A, Di Carlo A. Electrochemistry in Reverse Biased Dye Solar Cells and Dye/Electrolyte Degradation Mechanisms. Chemphyschem 2012; 13:2964-75. [DOI: 10.1002/cphc.201200229] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Indexed: 11/10/2022]
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26
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Zardetto V, Brown TM, Reale A, Di Carlo A. Substrates for flexible electronics: A practical investigation on the electrical, film flexibility, optical, temperature, and solvent resistance properties. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/polb.22227] [Citation(s) in RCA: 395] [Impact Index Per Article: 30.4] [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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27
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Toschi F, Orlanducci S, Tamburri E, Guglielmotti V, Terranova ML, Di Carlo A, Reale A, Falessi C. Carbon nanotubes/polydimethylsiloxanes systems for thermal management of miniaturized electronic components. J Nanosci Nanotechnol 2010; 10:8336-8340. [PMID: 21121336 DOI: 10.1166/jnn.2010.2663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The thermal performances of nanocomposite layers formed by Single-walled Carbon Nanotubes (SWCNT) dispersed in 2 different kind of polydimethyl-siloxane (PDMSO) matrices has been investigated by measuring the thermal resistance under conditions similar to the ones used for thermal management in microelectronics. A series of nanocomposite samples with thickness in the range 25 microm(-1) cm have been tested. The nanocomposites were prepared varying the amounts of nanotubes embedded in the matrix (from 0.1 to 5%w). In some cases also microsized graphites were mixed to the nanotube's fillers. For 25 micron thick layers, the thermal resistance of the neat silicone specimen can be reduced of 54% with the addition of 2%w carbon nanotubes. The variation of thermal conductivity as a function of the SWCNT's loading is reported and discussed. Furthermore the dispersion's effects of the nanotubes in the layers and the effects on the realization of a net-like system have been investigated.
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Affiliation(s)
- Francesco Toschi
- MINASlab-Universita' di Roma Tor Vergata-Dipartimento di Scienze e Tecnologie Chimiche-Via della Ricerca Scientifica-00133 Rome-Italy
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28
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Zanotti G, Angelini N, Paoletti AM, Pennesi G, Rossi G, Bonapasta AA, Mattioli G, Di Carlo A, Brown TM, Lembo A, Reale A. Synthesis of a novel unsymmetrical Zn(II) phthalocyanine bearing a phenyl ethynyl moiety as sensitizer for dye-sensitized solar cells. Dalton Trans 2010; 40:38-40. [PMID: 21076741 DOI: 10.1039/c0dt01292k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [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]
Abstract
A new unsymmetrical zinc phthalocyanine sensitizer has been synthesised. The anchoring of the molecule to nanocrystalline TiO(2) films is realised by a carboxylic group connected to a phenyl ethynyl moiety. Density Functional Theory (DFT) calculations show significant and positive effects of such a functionalization. Electron injection into the semiconductor and photocurrent generation in DSSC are also presented.
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Affiliation(s)
- Gloria Zanotti
- Center for Hybrid and Organic Solar Energy, Università di Tor Vergata, Via G. Peroni 400/402, 00131, Roma, Italy
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Tremonte P, Reale A, Di Renzo T, Tipaldi L, Di Luccia A, Coppola R, Sorrentino E, Succi M. Interactions between Lactobacillus sakei and CNC (Staphylococcus xylosus and Kocuria varians) and their influence on proteolytic activity. Lett Appl Microbiol 2010; 51:586-94. [DOI: 10.1111/j.1472-765x.2010.02939.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Iaffaldano N, Reale A, Sorrentino E, Coppola R, Di Iorio M, Rosato M. Risk of Salmonella transmission via cryopreserved semen in turkey flocks. Poult Sci 2010; 89:1975-80. [DOI: 10.3382/ps.2009-00573] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Petrocco A, Liberatore M, Carlo AD, Reale A, Brown TM, Decker F. Thermal activation of mass transport and charge transfer at Pt in the I3−/I− electrolyte of a dye-sensitized solar cell. Phys Chem Chem Phys 2010; 12:10786-92. [DOI: 10.1039/c002840a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zampieri M, Ciccarone F, Guastafierro T, Bacalini MG, Calabrese R, Moreno-Villanueva M, Reale A, Chevanne M, Bürkle A, Caiafa P. Validation of suitable internal control genes for expression studies in aging. Mech Ageing Dev 2009; 131:89-95. [PMID: 20038437 DOI: 10.1016/j.mad.2009.12.005] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2009] [Revised: 12/14/2009] [Accepted: 12/20/2009] [Indexed: 11/27/2022]
Abstract
Quantitative data from experiments of gene expression are often normalized through levels of housekeeping genes transcription by assuming that expression of these genes is highly uniform. This practice is being questioned as it becomes increasingly clear that the level of housekeeping genes expression may vary considerably in certain biological samples. To date, the validation of reference genes in aging has received little attention and suitable reference genes have not yet been defined. Our aim was to evaluate the expression stability of frequently used reference genes in human peripheral blood mononuclear cells with respect to aging. Using quantitative RT-PCR, we carried out an extensive evaluation of five housekeeping genes, i.e. 18s rRNA, ACTB, GAPDH, HPRT1 and GUSB, for stability of expression in samples from donors in the age range 35-74 years. The consistency in the expression stability was quantified on the basis of the coefficient of variation and two algorithms termed geNorm and NormFinder. Our results indicated GUSB be the most suitable transcript and 18s the least for accurate normalization in PBMCs. We also demonstrated that aging is a confounding factor with respect to stability of 18s, HPRT1 and ACTB expression, which were particularly prone to variability in aged donors.
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Affiliation(s)
- M Zampieri
- Department of Cellular Biotechnologies and Hematology, II Faculty of Medicine and Surgery, Sapienza University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
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Ria R, Moschetta M, Reale A, Mangialardi G, Castrovilli A, Vacca A, Dammacco F. Managing myelodysplastic symptoms in elderly patients. Clin Interv Aging 2009; 4:413-23. [PMID: 19966910 PMCID: PMC2785865 DOI: 10.2147/cia.s5203] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Indexed: 11/23/2022] Open
Abstract
Most patients with myelodysplastic syndromes (MDS) are elderly (median age range 65 to 70 years); as a consequence, the incidence and prevalence of these diseases are rising as the population ages. Physicians are often uncertain about how to identify patients who may benefit from specific treatment strategies. The International Prognostic Scoring System is a widely used tool to assess the risk of transformation to leukemia and to guide treatment decisions, but it fails to take into account many aspects of treating elderly patients, including comorbid illnesses, secondary causes of MDS, prior therapy for MDS, and other age-related health, functional, cognitive, and social problems that affect the outcome and managing of myelodysplastic symptoms. Patients with low-risk disease traditionally have been given only best supportive care, but evidence is increasing that treatment with novel non-conventional drugs such as lenalidomide or methyltransferase inhibitors may influence the natural history of the disease and should be used in conjunction with supportive-care measures. Supportive care of these patients could also be improved in order to enhance their quality of life and functional performance. Elderly patients commonly have multiple medical problems and use medications to deal with these. In addition, they are more likely to have more than one health care provider. These factors all increase the risk of drug interactions and the consequent treatment of toxicities. Manifestations of common toxicities or illnesses may be more subtle in the elderly, owing to age-associated functional deficits in multiple organ systems. Particularly important to the elderly MDS patient is the age-related decline in normal bone marrow function, including the diminished capacity of response to stressors such as infection or myelosuppressive treatments. Through the integration of geriatric and oncological strategies, a personalized approach toward this unique population may be applied. As with many diseases in the elderly, reliance on family members or friends to maintain the prescribed treatments, including travel to and from appointments, may place additional stressors on the patient and his/her support network. Careful evaluation and knowledge of functional status, ability to tolerate treatments, effect of disease progression, and general overall health conditions can provide the best opportunity to support these patients. Immediate assessment of daily living activities may detect deficiencies or deficits that often require early interventions.
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Affiliation(s)
- R Ria
- Department of Biomedical Sciences and Human Oncology, Section of Internal Medicine and Clinical Oncology, University of Bari Medical School, Bari, Italy.
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Nobili V, Reale A, Alisi A, Morino G, Trenta I, Pisani M, Marcellini M, Raucci U. Elevated serum ALT in children presenting to the emergency unit: Relationship with NAFLD. Dig Liver Dis 2009; 41:749-52. [PMID: 19362523 DOI: 10.1016/j.dld.2009.02.048] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2008] [Revised: 02/20/2009] [Accepted: 02/25/2009] [Indexed: 12/11/2022]
Abstract
BACKGROUND Non-alcoholic fatty liver disease, ranging from hepatic steatosis to necro-inflammation with or without fibrosis (non-alcoholic steatohepatitis), is a growing clinical liver disorder in children. AIM The goals of this study were to characterize liver disorders associated with elevated aminotransferases and establish the non-alcoholic fatty liver disease/non-alcoholic steatohepatitis prevalence in hypertransaminasemic children admitted to the emergency room. METHODS The medical records of 3280 children (2-17 years of age) admitted to the emergency room of Bambino Gesù Children's Hospital of Rome, and presenting with hypertransaminasemia were analysed retrospectively. RESULTS Elevation of serum alanine aminotransferases was present in 897 patients. Of these, 520 (58%) spontaneously normalized alanine aminotransferases, and 179/897 (20%) maintained persistently elevated alanine aminotransferases levels. Twenty-one patients were excluded because of medication or alcohol use. In the remaining 157 patients with elevated alanine aminotransferases, obesity was found in 87 (55%), viral infections in 52 (33%) and genetic diseases in 14 (9%). Obesity-related alanine aminotransferases elevation was associated with a histological diagnosis of non-alcoholic fatty liver disease in 85% of patients. In particular, steatosis was histologically confirmed in 74 patients; 43/74 (58%) had steatohepatitis, and 12/74 (16%) had fibrosis. CONCLUSIONS Twenty percent of children with elevated aminotransferases on routine testing may hide non-alcoholic fatty liver disease/non-alcoholic steatohepatitis. A careful diagnostic workup of persistent hypertransaminasemia in all obese subjects is warranted in the paediatric setting.
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Affiliation(s)
- V Nobili
- Liver Unit, Bambino Gesù Children's Hospital, Rome, Italy.
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Dominici L, Michelotti F, Brown TM, Reale A, Di Carlo A. Plasmon polaritons in the near infrared on fluorine doped tin oxide films. Opt Express 2009; 17:10155-10167. [PMID: 19506669 DOI: 10.1364/oe.17.010155] [Citation(s) in RCA: 8] [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] [Indexed: 05/27/2023]
Abstract
Here we investigate plasmon polaritons in fluorine doped tin oxide (FTO) films. By fitting reflectance and transmittance measurements as a function of wavelength lambda epsilon [1.0microm, 2.5microm] we derive a Drude dispersion relation of the free electrons in the transparent conducting oxide films. Then we compute the dispersion curves for the bulk and surface modes together with a reflectance map over an extended wavelength region (lambda==>10microm). Although the surface polariton dispersion for a single FTO/air interface when neglecting damping should appear clearly in the plots in the considered region (since it is supposedly far and isolated from other resonances), a complex behaviour can arise. This is due to different characteristic parameters, such as the presence of a finite extinction coefficient, causing an enlargement and backbending of the feature, and the low film thickness, via coupling between the modes from both the glass/FTO and FTO/air interfaces. Taking into account these effects, computations reveal a general behaviour for thin and absorbing conducting films. They predict a thickness dependent transition region between the bulk polariton and the surface plasmon branches as previously reported for indium tin oxide. Finally, attenuated total reflection measurements vs the incidence angle are performed over single wavelengths lines R(theta) (lambda= 0.633,0.830,1.300,1.550microm) and over a two dimensional domain R(theta,lambda) in the near infrared region lambda epsilon [1.45microm, 1.59microm]. Both of these functions exhibit a feature which is attributed to a bulk polariton and not to a surface plasmon polariton on the basis of comparison with spectrophotometer measurements and modeling. The predicted range for the emergence of a surface plasmon polariton is found to be above lambda >or= 2.1microm, while the optimal film thickness for its observation is estimated to be around 200nm.
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Affiliation(s)
- Lorenzo Dominici
- Dept of Energetics, Molecular Photonics Laboratory, SAPIENZA University, Roma, Italy.
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Zuppella P, Luciani D, Tucceri P, De Marco P, Gaudieri A, Kaiser J, Ottaviano L, Santucci S, Reale A. Large area interference lithography using a table-top extreme ultraviolet laser: a systematic study of the degree of mutual coherence. Nanotechnology 2009; 20:115303. [PMID: 19420437 DOI: 10.1088/0957-4484/20/11/115303] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A prototype low cost table-top Ar capillary discharge laser source (1.5 ns pulse duration, lambda = 46.9 nm) was successfully used to produce, by means of interference lithography (with a simple Lloyd mirror setup), large area (0.1 mm(2)) regular patterns from 400 nm down to 22.5 nm (half-pitch) on PMMA/Si (PMMA: polymethylmethacrylate) substrates. The experiments allowed a systematical investigation of the degree of mutual coherence of the source, giving a clear indication that the interference lithography can be pushed down to the ultimate resolution limit of lambda/4.
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Affiliation(s)
- P Zuppella
- Dipartimento di Fisica, Università dell'Aquila, L'Aquila, Italy
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Liberatore M, Decker F, Burtone L, Zardetto V, Brown TM, Reale A, Di Carlo A. Using EIS for diagnosis of dye-sensitized solar cells performance. J APPL ELECTROCHEM 2009. [DOI: 10.1007/s10800-009-9806-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [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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Mannina L, Sobolev A, Capitani D, Iaffaldano N, Rosato M, Ragni P, Reale A, Sorrentino E, D’Amico I, Coppola R. NMR metabolic profiling of organic and aqueous sea bass extracts: Implications in the discrimination of wild and cultured sea bass. Talanta 2008; 77:433-44. [DOI: 10.1016/j.talanta.2008.07.006] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2008] [Revised: 06/20/2008] [Accepted: 07/03/2008] [Indexed: 11/16/2022]
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Kappert A, Sutton G, Reale A, Skoglund KH. Untersuchungen über die Wirkung von Hydergin (CCK) auf die durch Noradrenalin ausgelöste Hypertension. Cardiology 2008. [DOI: 10.1159/000164943] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Parisse P, Luciani D, Santucci S, Zuppella P, Tucceri P, Reale A, Ottaviano L. Photoluminescence submicrometre spatial modulation of 6,13 pentacenequinone thin films. J Phys D: Appl Phys 2008. [DOI: 10.1088/0022-3727/41/11/112003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Cornaro C, Spena A, Brown TM, Di Carlo A, Reale A. The impact of outdoor meteorological parameters on the performance of dye-sensitized solar cells. ACTA ACUST UNITED AC 2008. [DOI: 10.1109/pvsc.2008.4922650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Reale L, Kaiser J, Reale A, Lai A, Flora F, Balerna A, Cinque G, Fanelli M, Ruggieri F, Faenov A, Pikuz T, Tucci A, Poma A, Zuppella P, Liska M, Malina R. Mapping the intake of different elements in vegetal tissues by dual-energy X-ray imaging at DaPhine synchrotron light source. Microsc Res Tech 2008; 71:179-85. [PMID: 17992692 DOI: 10.1002/jemt.20538] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [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: 11/11/2022]
Abstract
This article reports on the first utilization of the soft X-ray beamline at the DaPhine synchrotron light source for mapping the intake of different elements in plant tissues. As a test, the method of dual-energy X-ray microradiography was applied to the investigation of the natural sulfur content in dried leaf and root samples. Our ultimate goal was to monitor the pollutant lead and its intake, which was added in controlled doses to the hydroponic medium of laboratory-controlled samples of vegetal species. The results obtained by the nondestructive X-ray radiographic analysis are compared to the values of concentrations determined by a standard chemical analysis utilizing atomic absorption spectroscopy. From this comparison the validity of the X-ray detection of heavy metals in biological samples has been confirmed. The superposition of the dual energy results on the simple planar radiography shows the representation of the pollutant intake directly on the sample structures. It should be pointed out that this method, developed here for plant root and leaves could be applied to any biological sample of interest, but the preparation and observation conditions necessitate different strategies according to the type of sample under analysis.
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Affiliation(s)
- L Reale
- Faculty of Sciences, University of L'Aquila, gc LNGS INFN, INFM 67010 Coppito, Italy.
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Bacci C, Penso G, Salvini G, Baldini-Celio R, Capon G, Mencuccini C, Murtas GP, Reale A, Spinetti M, Stella B. Gamma-gamma interaction processes at Adone e+e− storage ring. Measurement of the reaction e++e−→e++e−+e++e−. ACTA ACUST UNITED AC 2008. [DOI: 10.1007/bf02824344] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Tremonte P, Succi M, Reale A, Di Renzo T, Sorrentino E, Coppola R. Interactions between strains of Staphylococcus xylosus and Kocuria varians isolated from fermented meats. J Appl Microbiol 2007; 103:743-51. [PMID: 17714408 DOI: 10.1111/j.1365-2672.2007.03315.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [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: 11/30/2022]
Abstract
AIMS To evaluate the interactions of Staphylococcus xylosus on Kocuria varians strains isolated from fermented meat products. METHODS AND RESULTS Interactions were assessed in vitro by agar spot test, agar well diffusion assay and spectrophotometric assay. The growth of K. varians (five strains) alone was compared with that in the presence of growing cells of S. xylosus (50 strains) or in the presence of heat-treated or untreated supernatants of S. xylosus. Sixteen strains stimulated the growth of K. varians K4, while four strains inhibited the K4 strain. Heated cell-free supernatants of S. xylosus did not have any effect on K. varians. The proteolytic activity of single strains or their combinations was assessed in vitro and in vivo by sodiumdodecylsulfate-polyacrylamide gel electrophoresis of sarcoplasmic protein extracts. Combinations of stimulatory strains of S. xylosus and K. varians showed a higher proteolytic activity compared with that of S. xylosus or K. varians alone. CONCLUSIONS The interactions between strains may influence both the growth of the co-cultured strains and proteolysis, technologically relevant characteristics. SIGNIFICANCE AND IMPACT OF THE STUDY The study of interactions between coagulase-negative cocci may guide the formulation of mixed strain starters for the production of fermented sausages.
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Affiliation(s)
- P Tremonte
- Dipartimento di Scienze e Tecnologie Agro-alimentari, Ambientali e Microbiologiche, Università degli Studi del Molise, Via De Sanctis, Campobasso, Italy.
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Ritucci A, Tomassetti G, Reale A, Arrizza L, Zuppella P, Reale L, Palladino L, Flora F, Bonfigli F, Faenov A, Pikuz T, Kaiser J, Nilsen J, Jankowski AF. Damage and ablation of large bandgap dielectrics induced by a 46.9 nm laser beam. Opt Lett 2006; 31:68-70. [PMID: 16419880 DOI: 10.1364/ol.31.000068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We applied a 0.3 mJ, 1.7 ns, 46.9 nm soft-x-ray argon laser to ablate the surface of large bandgap dielectrics: CaF2 and LiF crystals. We studied the ablation versus the fluence of the soft-x-ray beam, varying the fluence in the range 0.05-3 J/cm2. Ablation thresholds of 0.06 and 0.1 J/cm2 and ablation depths of 14 and 20 nm were found for CaF2 and LiF, respectively. These results define new ablation conditions for these large bandgap dielectrics that can be of interest for the fine processing of these materials.
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Affiliation(s)
- A Ritucci
- Department of Physics, University of L'Aquila, gc Laboratorio Nazionale del Gran Sasso, Istituto Nazionale di Fisica Nucleare, 67010 Coppito, L'Aquila, Italy.
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Abstract
The aim of this study was to investigate differences in modified atmosphere packaging (MAP) for the improvement of the shelf life of fresh meat products. Three different conditions for preserving fresh sausages were tested: MAP1 (20% CO2, 70% O2, and 10% N2), MAP2 (40% CO2 and 60% O2), and MAP3 (40% CO2, 30% O2, and 30% N2). Samples from the MAP2 group had fewer spoilage bacteria, stable red color (no change of a* value), and good physical attributes (high water-holding capacity, little loss from cooking, and low shear force needed for cutting) compared with samples from other treatment groups. Thus, high concentrations of CO2 (40%) and O2 (60%) resulted in a longer shelf life for fresh sausages.
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Affiliation(s)
- P Tremonte
- Dipartimento di Scienze e Tecnologie Agro-alimentari, Ambientali e Microbiologiche, Università degli Studi del Molise, Campobasso, Italy
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Bianca S, Bartoloni G, Auditore S, Reale A, Tetto C, Ingegnosi C, Pirruccello B, Ettore G. Prenatal 2-Dimensional and 3-Dimensional Ultrasonography Diagnosis and Autoptic Findings of Isolated Ectopia Cordis. Cardiology 2005; 105:37-40. [PMID: 16215329 DOI: 10.1159/000088758] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2005] [Accepted: 06/28/2005] [Indexed: 11/19/2022]
Abstract
Ectopia cordis is a very rare congenital malformation, commonly associated with intracardiac anomalies. It is due to a defect in fusion of the anterior chest wall resulting in an extrathoracic location of the heart. We report prenatal 2-dimensional (2D) and 3D ultrasonography diagnosis and postnatal autoptic findings of an isolated ectopia cordis with tricuspid atresia. Ectopia cordis prenatal diagnosis is easily made with ultrasound by visualizing the heart outside the thoracic cavity. 3D ultrasonography may add more detailed visualization of the heart anomaly even if the 2D ultrasonography alone permits the prenatal diagnosis. Obstetrical management should include a careful search for associated anomalies, especially cardiac, and the assessment of fetal karyotype. As this is considered a sporadic anomaly, the recurrence risk is low and no genetic origin is known.
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Affiliation(s)
- S Bianca
- Centro di Consulenza Genetica e di Teratologia della Riproduzione, Catania, Italy.
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Succi M, Tremonte P, Reale A, Sorrentino E, Grazia L, Pacifico S, Coppola R. Bile salt and acid tolerance ofLactobacillus rhamnosusstrains isolated from Parmigiano Reggiano cheese. FEMS Microbiol Lett 2005; 244:129-37. [PMID: 15727832 DOI: 10.1016/j.femsle.2005.01.037] [Citation(s) in RCA: 141] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2004] [Revised: 09/09/2004] [Accepted: 01/20/2005] [Indexed: 12/19/2022] Open
Abstract
This study aimed to compare phenotypic and genetic characteristics of Lactobacillus rhamnosus strains isolated at the end of the ripening of Parmigiano Reggiano cheese and to investigate an important prerequisite of probiotic interest, such as the capability to survive at low pH and in presence of bile salts. The use of API 50 CH, RAPD-PCR analysis and species-specific PCR allowed to ascertain the identity of 63 L. rhamnosus strains. Three L. rhamnosus strains isolated from Parmigiano Reggiano cheese, L. rhamnosus ATCC 7469T and the commercial strain L. GG were assayed to estimate the resistance to various stress factors reproducing in vitro some conditions of the gastro-intestinal environment such as low pH and different amounts of bile salts and acids. The behaviour of almost all the tested strains isolated from Parmigiano Reggiano cheese resulted analogous to that showed by L. GG.
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Affiliation(s)
- M Succi
- Dipartimento di Scienze e Tecnologie Agro-alimentari, Ambientali e Microbiologiche, Università degli Studi del Molise, Via De Sanctis, 86100 Campobasso, Italy
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Bianca S, Ingegnosi C, Auditore S, Reale A, Galasso MG, Bartoloni G, Arancio A, Ettore G. Prenatal and postnatal findings of acrania. Arch Gynecol Obstet 2004; 271:256-8. [PMID: 15185096 DOI: 10.1007/s00404-004-0621-2] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2003] [Accepted: 03/07/2004] [Indexed: 10/26/2022]
Abstract
INTRODUCTION Acrania is a rare congenital anomaly in which the flat bones of the cranial vault are partial or complete absent with complete but abnormal development of the cerebral hemispheres. CASE REPORT We report two cases, diagnosed prenatally by ultrasound and followed by medical pregnancy termination, one with isolated acrania and one with associated cleft lip and palate and spina bifida. DISCUSSION The acrania pathogenesis is unknown and differential diagnosis should be made with other conditions like anencephaly and acalvaria. Genetic counselling is not easy because there is no evidence for a specific genetic origin, but the extreme rarity and sporadic nature suggests a low recurrence risk.
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Affiliation(s)
- S Bianca
- Registro Siciliano Malformazioni Congenite, P.O. Garibaldi-Nesima, Via Palermo, 95123 Catania, Italy.
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50
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Affiliation(s)
- S Bianca
- Registro Siciliano Malformazioni Congenite, Dipartimento di Pediatria, Via S. Sofia 78, Catania 95123, Italy.
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