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Szpytma M, Ślęzak M, Janus W, Nayyef H, Ślęzak T, Mandziak A, Zając M, Wilgocka-Ślęzak D, Menteş TO, Jugovac M, Locatelli A, Kozioł-Rachwał A. Transfer of magnetic anisotropy in epitaxial Co/NiO/Fe trilayers. Sci Rep 2024; 14:1680. [PMID: 38243038 PMCID: PMC10798992 DOI: 10.1038/s41598-024-51896-w] [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: 06/16/2023] [Accepted: 01/10/2024] [Indexed: 01/21/2024] Open
Abstract
The magnetic properties of Co(10 Å)/NiO(40 Å)/Fe trilayer epitaxially grown on W(110) substrate were investigated with use of x-ray magnetic linear dichroism (XMLD) and x-ray magnetic circular dichroism (XMCD). We showed that magnetic anisotropy of Fe film that can be controlled by a thickness-driven spin reorientation transition is transferred via interfacial exchange coupling not only to NiO layer but further to ferromagnetic Co overlayer as well. Similarly, a temperature driven spin reorientation of Fe sublayer induces a reorientation of NiO spin orientation and simultaneous switching of the Co magnetization direction. Finally, by element specific XMCD and XMLD magnetic hysteresis loop measurements we proved that external magnetic field driven reorientation of Fe and Co magnetizations as well as NiO Néel vector are strictly correlated and magnetic anisotropy fields of Fe and Co sublayers are identical despite the different crystal structures.
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Affiliation(s)
- M Szpytma
- Faculty of Physics and Applied Computer Science, AGH University of Krakow, Krakow, Poland.
| | - M Ślęzak
- Faculty of Physics and Applied Computer Science, AGH University of Krakow, Krakow, Poland
| | - W Janus
- Faculty of Physics and Applied Computer Science, AGH University of Krakow, Krakow, Poland
| | - H Nayyef
- Faculty of Physics and Applied Computer Science, AGH University of Krakow, Krakow, Poland
| | - T Ślęzak
- Faculty of Physics and Applied Computer Science, AGH University of Krakow, Krakow, Poland
| | - A Mandziak
- National Synchrotron Radiation Centre SOLARIS, Jagiellonian University, Krakow, Poland
| | - M Zając
- National Synchrotron Radiation Centre SOLARIS, Jagiellonian University, Krakow, Poland
| | - D Wilgocka-Ślęzak
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, Poland
| | - T O Menteş
- Elettra - Sincrotrone Trieste, Basovizza, Trieste, Italy
| | - M Jugovac
- Elettra - Sincrotrone Trieste, Basovizza, Trieste, Italy
| | - A Locatelli
- Elettra - Sincrotrone Trieste, Basovizza, Trieste, Italy
| | - A Kozioł-Rachwał
- Faculty of Physics and Applied Computer Science, AGH University of Krakow, Krakow, Poland
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2
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Palmeri R, Salerno N, Mauro GS, Rocco D, Locatelli A, Torrisi G, Sorbello G. Optimization of sub-relativistic co-propagating accelerating structures. Opt Express 2023; 31:38891-38909. [PMID: 38017981 DOI: 10.1364/oe.502762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 10/03/2023] [Indexed: 11/30/2023]
Abstract
In this paper, novel optimization methodologies of sub-relativistic guided interaction structures for dielectric laser particle acceleration (DLA) are presented. In particular, we focus on co-propagating geometries based on slot waveguides in continuous wave (CW) operation, where the particle flow and the direction of propagation of the accelerating field are co-linear. Since the velocity of sub-relativistic particles varies along the acceleration path, proper tapering of the waveguide geometry is required to achieve an extended acceleration region, and, thus a large energy gain. The design of an optimal taper ensuring particle-wave synchronicity and maximum energy gain is pursued through a physics-based approach, and these results are compared, for validation, with the outcomes of a downhill simplex method searching algorithm. Additionally, the application of a simplified 2D model of the accelerating slot waveguide is investigated and profitably used to get qualitative results useful for fast structure optimization. Indeed, this approach can hold significant potential for the development of novel accelerating structures, as it enables a thorough and fast exploration of the design space.
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Poma S, Bonomo MC, Gazzaniga G, Pizzulli M, De Silvestri A, Baldi C, Broglia F, Ciceri M, Fuardo M, Morgante F, Pellicori S, Roldi EM, Delmonte MP, Mojoli F, Locatelli A. Complications of unintentional dural puncture during labour epidural analgesia: a 10-year retrospective observational study. J Anesth Analg Crit Care 2023; 3:42. [PMID: 37880725 PMCID: PMC10601237 DOI: 10.1186/s44158-023-00127-1] [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: 06/07/2023] [Accepted: 10/14/2023] [Indexed: 10/27/2023]
Abstract
INTRODUCTION Unintentional dural puncture (UDP) occurs in 0.5-1.5% of labour epidural analgesia cases. To date, little is known about evidence of UDP-related complications. This work aimed to assess the incidence of intrapartum and postpartum complications in parturients who experienced UDP. METHODS This is a 10-year retrospective observational study on parturients admitted to our centre who presented UDP. Data collection gathered UDP-related complications during labour and postpartum. All women who displayed UDP received medical therapy and bed rest. An epidural blood patch (EBP) was not used in this population. Once asymptomatic, patients were discharged from the hospital. RESULTS Out of 7718 neuraxial analgesia cases, 97 cases of UDP occurred (1.25%). During labour, complications appeared in a small percentage of analgesia procedures performed, including total spinal anaesthesia (1.0%), extended motor block (3%), hypotension (4.1%), abnormal foetal heart rate (2%), inadequate analgesia (14.4%), and general anaesthesia following neuraxial anaesthesia failure (33.3% of emergency caesarean sections). During the postpartum period, 53.6% of parturients exhibited a postdural puncture headache, 13.4% showed neurological symptoms, and 14.4% required neurological consultation and neuroimaging. No patient developed subdural hematoma or cerebral venous sinus thrombosis; one woman presented posterior reversible encephalopathy syndrome associated with eclampsia. Overall, 82.5% of women experienced an extension of hospital stay. CONCLUSION Major complications occurred in a small percentage of patients during labour. However, since they represent high-risk maternal and neonatal health events, a dedicated anaesthesiologist and a trained obstetric team are essential. No major neurological complications were registered postpartum, and EBP was not performed. Nevertheless, all patients with UDP were carefully monitored and treated until complete recovery before discharge, leading to an extension of their hospitalization.
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Affiliation(s)
- S Poma
- Anaesthesia and Postoperative Intensive Care, Department of Anaesthesia and Intensive Care 3, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, 27100, Italy.
| | - M C Bonomo
- Department of Anaesthesia and Intensive Care, ASST Bergamo EST, Seriate Hospital, Seriate, Italy
| | - G Gazzaniga
- Department of Anaesthesia and Intensive Care 1, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, Italy
| | - M Pizzulli
- Anaesthesia and Postoperative Intensive Care, Department of Anaesthesia and Intensive Care 3, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, 27100, Italy
| | - A De Silvestri
- Clinical Epidemiology and Biostatistics, Scientific Direction, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, Italy
| | - C Baldi
- Anaesthesia and Postoperative Intensive Care, Department of Anaesthesia and Intensive Care 3, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, 27100, Italy
| | - F Broglia
- Anaesthesia and Postoperative Intensive Care, Department of Anaesthesia and Intensive Care 3, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, 27100, Italy
| | - M Ciceri
- Anaesthesia and Postoperative Intensive Care, Department of Anaesthesia and Intensive Care 3, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, 27100, Italy
| | - M Fuardo
- Anaesthesia and Postoperative Intensive Care, Department of Anaesthesia and Intensive Care 3, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, 27100, Italy
| | - F Morgante
- Anaesthesia and Postoperative Intensive Care, Department of Anaesthesia and Intensive Care 3, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, 27100, Italy
| | - S Pellicori
- Anaesthesia and Postoperative Intensive Care, Department of Anaesthesia and Intensive Care 3, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, 27100, Italy
| | - E M Roldi
- Anaesthesia and Postoperative Intensive Care, Department of Anaesthesia and Intensive Care 3, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, 27100, Italy
| | - M P Delmonte
- Anaesthesia and Postoperative Intensive Care, Department of Anaesthesia and Intensive Care 3, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, 27100, Italy
| | - F Mojoli
- Department of Anaesthesia and Intensive Care 1, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, Italy
| | - A Locatelli
- Anaesthesia and Postoperative Intensive Care, Department of Anaesthesia and Intensive Care 3, I.R.C.C.S. Policlinic San Matteo Hospital Foundation, Pavia, 27100, Italy
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Cojocariu I, Jugovac M, Locatelli A, Menteş TO. Resonant Auger spectromicroscopy in ultrathin Fe films on W(110). J Phys Condens Matter 2023; 35. [PMID: 37582382 DOI: 10.1088/1361-648x/acf0b0] [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] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 08/15/2023] [Indexed: 08/17/2023]
Abstract
L3M2,3M2,3Auger transition is measured near the L3resonance of ferromagnetic Fe films on W(110). The kinetic energies of the Auger peaks display the typical Raman behaviour for photon energies well below the absorption threshold, where the Auger energy follows the changes in the photon energy. Classical Auger behaviour with constant kinetic energy sets in at about 1.5 eV below the L3resonance independently from the number of Fe layers down to the monolayer thickness. Strong x-ray circular magnetic dichroism is observed at the L3edge in the entire L3M2,3M2,3Auger spectrum. Different Auger features originating from the final state with two 3p core holes show slight variations in the dichroic signal, which is attributed to the exchange interaction between the core holes and the valence band. Finally, XMCD-PEEM magnetic domain imaging using Auger electrons is demonstrated with a high level of contrast and lateral resolution approaching that of imaging with secondary photoelectrons.
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Affiliation(s)
- I Cojocariu
- Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14 km 163.5, 34149 Trieste, Italy
- Dipartimento di Fisica, Università degli studi di Trieste, Via A. Valerio 2, 34127 Trieste, Italy
| | - M Jugovac
- Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14 km 163.5, 34149 Trieste, Italy
| | - A Locatelli
- Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14 km 163.5, 34149 Trieste, Italy
| | - T O Menteş
- Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14 km 163.5, 34149 Trieste, Italy
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Janus W, Ślęzak T, Ślęzak M, Szpytma M, Dróżdż P, Nayyef H, Mandziak A, Wilgocka-Ślęzak D, Zając M, Jugovac M, Menteş TO, Locatelli A, Kozioł-Rachwał A. Tunable magnetic anisotropy of antiferromagnetic NiO in (Fe)/NiO/MgO/Cr/MgO(001) epitaxial multilayers. Sci Rep 2023; 13:4824. [PMID: 36964276 PMCID: PMC10039026 DOI: 10.1038/s41598-023-31930-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/20/2023] [Indexed: 03/26/2023] Open
Abstract
We report on the magnetic properties of antiferromagnetic NiO(001) thin films in epitaxially grown NiO/MgO(dMgO)/Cr/MgO(001) system for different thicknesses of MgO, dMgO. Results of X-ray Magnetic Linear Dichroism show that together with an increase of dMgO, rotation of NiO spins from in-plane towards out-of-plane direction occurs. Furthermore, we investigated how the proximity of Fe modifies the magnetic state of NiO in Fe/NiO/MgO(dMgO)/Cr/MgO(001). We proved the existence of a multidomain state in NiO as a result of competition between the ferromagnet/antiferromagnet exchange coupling and strain exerted on the NiO by the MgO buffer layer.
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Affiliation(s)
- W Janus
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Kraków, Poland.
| | - T Ślęzak
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Kraków, Poland
| | - M Ślęzak
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Kraków, Poland
| | - M Szpytma
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Kraków, Poland
| | - P Dróżdż
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Kraków, Poland
| | - H Nayyef
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Kraków, Poland
| | - A Mandziak
- SOLARIS National Synchrotron Radiation Centre, Jagiellonian University, Krakow, Poland
| | - D Wilgocka-Ślęzak
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Krakow, Poland
| | - M Zając
- SOLARIS National Synchrotron Radiation Centre, Jagiellonian University, Krakow, Poland
| | - M Jugovac
- Elettra-Sincrotrone Trieste S.C.P.A., Basovizza, Trieste, Italy
| | - T O Menteş
- Elettra-Sincrotrone Trieste S.C.P.A., Basovizza, Trieste, Italy
| | - A Locatelli
- Elettra-Sincrotrone Trieste S.C.P.A., Basovizza, Trieste, Italy
| | - A Kozioł-Rachwał
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Kraków, Poland
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Locatelli A, Treggiari E, Innocenti M, Romanelli G. Percutaneous ultrasound-guided microwave ablation for treatment of hepatocellular carcinomas in dogs: four cases (2019-2020). J Small Anim Pract 2022; 63:897-903. [PMID: 36000486 DOI: 10.1111/jsap.13546] [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: 10/30/2021] [Revised: 07/10/2022] [Accepted: 07/16/2022] [Indexed: 12/24/2022]
Abstract
OBJECTIVES To describe ultrasound-guided microwave ablation as a minimally invasive treatment option for primary or metastatic hepatocellular carcinomas. METHODS Four client-owned dogs underwent percutaneous ultrasound-guided microwave ablation of three primary and one metastatic hepatocellular carcinoma, diagnosed on cytology/histopathology. In each case, multiple ultrasound-guided thermal lesions were created in a 10 to 40 minutes ablation at 30 to 35 W. Real-time monitoring was performed using 10 MHz diagnostic ultrasound transducers. The procedures were performed without complication and CT scans or abdominal ultrasounds were repeated immediately after. Patients were discharged on oral analgesia on the same day or 24 hours later. RESULTS Hepatocellular carcinomas were successfully ablated, which in some cases resulted in an improvement in clinical signs and laboratory values. The patients were followed up for a time ranging between 39 and 649 days and no evidence of disease progression was found. Three out of four patients are still alive at the time of writing. CLINICAL SIGNIFICANCE In these four patients, minimally invasive ultrasound-guided microwave ablation was feasible and resulted in no immediate complications. Regular imaging follow-up is recommended after the procedure and further studies on microwave ablation are warranted to establish its effectiveness in dogs with hepatocellular carcinomas.
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Affiliation(s)
- A Locatelli
- Centro Specialistico Veterinario, 20141, Milan, Italy
| | - E Treggiari
- Centro Specialistico Veterinario, 20141, Milan, Italy
| | - M Innocenti
- Centro Specialistico Veterinario, 20141, Milan, Italy
| | - G Romanelli
- Centro Specialistico Veterinario, 20141, Milan, Italy
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Genovese E, Cantarutti A, Corrao G, Locatelli A. Maternal and perinatal health in undocumented migrants: estimating access and outcomes through HMIS. Eur J Public Health 2022. [DOI: 10.1093/eurpub/ckac131.527] [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: 11/13/2022] Open
Abstract
Abstract
Background
Vulnerability and inequality are exacerbated in undocumented migrants, the most invisible to health systems.
Objectives
To estimate maternal and perinatal health needs in undocumented migrants and test a methodology for systematic monitoring & evaluation.
Methods
Population-based retrospective cohort study based on routine data through maternity records and temporary registration code in a sub-national Health Management Information System.
Results
420924 deliveries including 1524 undocumented migrants having accessed maternity care through the NHS in Lombardy Region (Italy) from 2016 to 2021 were included. Demographics and social determinants: undocumented migrants were born in Europe (non-EU) (36%), Americas (30%), Africa (6%), Western Pacific (3%), South-East Asia (2%), Italy (2%), were stateless (7%); 52% had no/low schooling, 92% were unemployed and 52% non-married, compared to 15%, 20%, and 44% Italians. Obstetric history and antenatal care: 22% undocumented migrants had a previous abortion and 15% a previous cesarean delivery; 58% had ≥5 antenatal visits, 67% first ANC visit in trimester 1, 64% ≥ 2 ultrasounds incl. first in trimester 1, 6% full laboratory tests, compared to 90%, 97%, 97%, and 66% Italians. Intra-partum and perinatal care: 45% undocumented migrants delivered in a public hospital with neonatal intensive care unit; 69% had a normal delivery, 5% instrumental delivery, 10% and 27% emergency and total cesarean section; 2.6% neonates had emergency resuscitation and 49% were breastfed <2h from birth. Outcomes: 81% physiological pregnancies, 2.3% severe hemorrhage, 4.8% intra-uterine growth retardation, 9.3% pre-term delivery, 17% small for gestational age, 7% low birth weight, 0.6% poor Apgar score, 3% malformations.
Conclusions
Maternal and perinatal health was poor in undocumented migrants, varying by birthplace. Social determinants, health coverage and outcomes showed vulnerability and inequality compared to the general population.
Key messages
• Tailored interventions are needed: outreach health promotion on safe motherhood and neonatal care, healthcare provider training, cultural mediation, translation, and functional language learning.
• A systematic monitoring and evaluation system needs to routinely collect, integrate, and analyze data on key indicators.
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Affiliation(s)
- E Genovese
- Department of Medicine and Surgery, University of Milan-Bicocca , Milan, Italy
| | - A Cantarutti
- Department of Statistics, University of Milan-Bicocca , Milan, Italy
| | - G Corrao
- Department of Statistics, University of Milan-Bicocca , Milan, Italy
| | - A Locatelli
- Department of Medicine and Surgery, University of Milan-Bicocca , Milan, Italy
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8
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Boriani G, Diemberger I, Pisano' ECL, Pieragnoli P, Locatelli A, Capucci A, Talarico A, Zecchin M, Rapacciuolo A, Piacenti M, Indolfi C, Arias MA, Checchinato C, D'Onofrio A. Influence of obesity and overweight on the association between sleep-disordered breathing and atrial fibrillation: the DASAP-HF study. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.530] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
The association between sleep apnea (SA) and atrial fibrillation (AF) has been well described. However, it remains unclear whether the association is causative or primarily dependent on shared comorbidities such as obesity. The Respiratory Disturbance Index (RDI) computed by an implantable cardioverter defibrillator (ICD) algorithm accurately identifies severe SA, whether central or obstructive in origin.
Purpose
In the present analysis we studied in patients with heart failure the contribution of obesity in the relationship between SA, measured by RDI, and AF.
Methods
Patients with ejection fraction ≤35% implanted with an ICD endowed with an algorithm (ApneaScan) that calculates the RDI each night, were enrolled and followed-up for 24 months. The weekly mean RDI value was considered, as calculated during the entire follow-up period. The endpoint was daily AF burden of ≥6 hours.
Results
164 patients (age 67±10 years, 75% male, ejection fraction 29±5%) had usable RDI values during the entire follow-up period. Body mass index (BMI) was <25 kg/m2 in 62 patients (normal), 25.0–29.9 kg/m2 in 66 patients (overweight), ≥ 30 kg/m2 in 36 patients (obese). When compared with normal patients (31±11 episodes/h), the average RDI value calculated during the entire follow-up period did not differ in overweight patients (35±13 episodes/h, p=0.114), but was significantly higher in obese patients (39±12 episodes/h, p=0.002). During follow-up, AF burden ≥6 hours/day was documented in 48 (29%) patients (BMI ≥ versus <25 kg/m2; HR: 1.47, 95% CI: 0.83–2.60, p=0.197; BMI ≥ versus <30 kg/m2; HR: 0.98, 95% CI: 0.46–2.09, p=0.963). Based on the ROC curve analysis, average RDI ≥37 episodes/h maximized sensitivity and specificity for the prediction of AF (Area under the curve: 0.63, 95% CI: 0.55–0.70, p=0.011). Device-detected RDI ≥37 episodes/h was associated with the occurrence of AF on univariate analysis (HR: 3.88, 95% CI: 2.02–7.44, p<0.001), as well as after correction for either BMI ≥25 kg/m2 (HR: 3.76, 95% CI: 1.94–7.26, p<0.001), or BMI ≥30 kg/m2 (HR: 4.15, 95% CI: 2.15–8.04, p<0.001).
Conclusions
In heart failure patients, we confirmed the association between ICD-detected SA and AF, an association that persisted independent of patient body habitus.
Funding Acknowledgement
Type of funding sources: Private grant(s) and/or Sponsorship. Main funding source(s): The study is supported by a research grant from Boston Scientific
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Affiliation(s)
- G Boriani
- Modena Polyclinic Modena University Hospital , Modena , Italy
| | - I Diemberger
- Institute of Cardiology, Univ. of Bologna , Bologna , Italy
| | | | | | | | - A Capucci
- Marche Polytechnic University of Ancona , Ancona , Italy
| | | | - M Zecchin
- University of Trieste , Trieste , Italy
| | | | - M Piacenti
- Fondazione Toscana Gabriele Monasterio , Pisa , Italy
| | - C Indolfi
- Magna Graecia University of Catanzaro , Catanzaro , Italy
| | - M A Arias
- Hospital Virgen de la Salud , Toledo , Spain
| | - C Checchinato
- Santa Croce Hospital of Moncalieri , Moncalieri , Italy
| | - A D'Onofrio
- AO dei Colli - Monaldi Hospital , Naples , Italy
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9
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Fratelli N, Prefumo F, Maggi C, Cavalli C, Sciarrone A, Garofalo A, Viora E, Vergani P, Ornaghi S, Betti M, Vaglio Tessitore I, Cavaliere AF, Buongiorno S, Vidiri A, Fabbri E, Ferrazzi E, Maggi V, Cetin I, Frusca T, Ghi T, Kaihura C, Di Pasquo E, Stampalija T, Belcaro C, Quadrifoglio M, Veneziano M, Mecacci F, Simeone S, Locatelli A, Consonni S, Chianchiano N, Labate F, Cromi A, Bertucci E, Facchinetti F, Fichera A, Granata D, D'Antonio F, Foti F, Avagliano L, Bulfamante G, Calì G. Third-trimester ultrasound for antenatal diagnosis of placenta accreta spectrum in women with placenta previa: results from the ADoPAD study. Ultrasound Obstet Gynecol 2022; 60:381-389. [PMID: 35247287 PMCID: PMC9544821 DOI: 10.1002/uog.24889] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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: 10/12/2021] [Revised: 01/27/2022] [Accepted: 03/05/2022] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To evaluate the performance of third-trimester ultrasound for the diagnosis of clinically significant placenta accreta spectrum disorder (PAS) in women with low-lying placenta or placenta previa. METHODS This was a prospective multicenter study of pregnant women aged ≥ 18 years who were diagnosed with low-lying placenta (< 20 mm from the internal cervical os) or placenta previa (covering the internal cervical os) on ultrasound at ≥ 26 + 0 weeks' gestation, between October 2014 and January 2019. Ultrasound suspicion of PAS was raised in the presence of at least one of these signs on grayscale ultrasound: (1) obliteration of the hypoechogenic space between the uterus and the placenta; (2) interruption of the hyperechogenic interface between the uterine serosa and the bladder wall; (3) abnormal placental lacunae. Histopathological examinations were performed according to a predefined protocol, with pathologists blinded to the ultrasound findings. To assess the ability of ultrasound to detect clinically significant PAS, a composite outcome comprising the need for active management at delivery and histopathological confirmation of PAS was considered the reference standard. PAS was considered to be clinically significant if, in addition to histological confirmation, at least one of these procedures was carried out after delivery: use of hemostatic intrauterine balloon, compressive uterine suture, peripartum hysterectomy, uterine/hypogastric artery ligation or uterine artery embolization. The diagnostic performance of each ultrasound sign for clinically significant PAS was evaluated in all women and in the subgroup who had at least one previous Cesarean section and anterior placenta. Post-test probability was assessed using Fagan nomograms. RESULTS A total of 568 women underwent transabdominal and transvaginal ultrasound examinations during the study period. Of these, 95 delivered in local hospitals, and placental pathology according to the study protocol was therefore not available. Among the 473 women for whom placental pathology was available, clinically significant PAS was diagnosed in 99 (21%), comprising 36 cases of placenta accreta, 19 of placenta increta and 44 of placenta percreta. The median gestational age at the time of ultrasound assessment was 31.4 (interquartile range, 28.6-34.4) weeks. A normal hypoechogenic space between the uterus and the placenta reduced the post-test probability of clinically significant PAS from 21% to 5% in women with low-lying placenta or placenta previa in the third trimester of pregnancy and from 62% to 9% in the subgroup with previous Cesarean section and anterior placenta. The absence of placental lacunae reduced the post-test probability of clinically significant PAS from 21% to 9% in women with low-lying placenta or placenta previa in the third trimester of pregnancy and from 62% to 36% in the subgroup with previous Cesarean section and anterior placenta. When abnormal placental lacunae were seen on ultrasound, the post-test probability of clinically significant PAS increased from 21% to 59% in the whole cohort and from 62% to 78% in the subgroup with previous Cesarean section and anterior placenta. An interrupted hyperechogenic interface between the uterine serosa and bladder wall increased the post-test probability for clinically significant PAS from 21% to 85% in women with low-lying placenta or placenta previa and from 62% to 88% in the subgroup with previous Cesarean section and anterior placenta. When all three sonographic markers were present, the post-test probability for clinically significant PAS increased from 21% to 89% in the whole cohort and from 62% to 92% in the subgroup with previous Cesarean section and anterior placenta. CONCLUSIONS Grayscale ultrasound has good diagnostic performance to identify pregnancies at low risk of PAS in a high-risk population of women with low-lying placenta or placenta previa. Ultrasound may be safely used to guide management decisions and concentrate resources on patients with higher risk of clinically significant PAS. © 2022 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- N. Fratelli
- Division of Obstetrics and Gynecology, ASST Spedali Civili, Department of Clinical and Experimental SciencesUniversity of BresciaBresciaItaly
| | - F. Prefumo
- Division of Obstetrics and Gynecology, ASST Spedali Civili, Department of Clinical and Experimental SciencesUniversity of BresciaBresciaItaly
| | - C. Maggi
- Division of Obstetrics and Gynecology, ASST Spedali Civili, Department of Clinical and Experimental SciencesUniversity of BresciaBresciaItaly
| | - C. Cavalli
- Division of Obstetrics and Gynecology, ASST Spedali Civili, Department of Clinical and Experimental SciencesUniversity of BresciaBresciaItaly
| | - A. Sciarrone
- Obstetrics–Gynecological Ultrasound and Prenatal Diagnosis Unit, Department of Obstetrics and GynecologyCittà della Salute e della ScienzaTurinItaly
| | - A. Garofalo
- Obstetrics–Gynecological Ultrasound and Prenatal Diagnosis Unit, Department of Obstetrics and GynecologyCittà della Salute e della ScienzaTurinItaly
| | - E. Viora
- Obstetrics–Gynecological Ultrasound and Prenatal Diagnosis Unit, Department of Obstetrics and GynecologyCittà della Salute e della ScienzaTurinItaly
| | - P. Vergani
- University of Milan‐Bicocca, School of Medicine and Surgery, Department of Obstetrics and GynecologyFondazione MBBM Onlus, San Gerardo HospitalMonzaItaly
| | - S. Ornaghi
- University of Milan‐Bicocca, School of Medicine and Surgery, Department of Obstetrics and GynecologyFondazione MBBM Onlus, San Gerardo HospitalMonzaItaly
| | - M. Betti
- Obstetrics and Gynaecology Unit, A. Manzoni Hospital, ASST LeccoLeccoItaly
| | - I. Vaglio Tessitore
- University of Milan‐Bicocca, School of Medicine and Surgery, Department of Obstetrics and GynecologyFondazione MBBM Onlus, San Gerardo HospitalMonzaItaly
| | - A. F. Cavaliere
- Dipartimento Scienze della Salute della Donna e del Bambino e di Sanità PubblicaFondazione Policlinico Universitario ‘A. Gemelli’ IRCCS‐Università Cattolica del Sacro CuoreRomeItaly
| | - S. Buongiorno
- Dipartimento Scienze della Salute della Donna e del Bambino e di Sanità PubblicaFondazione Policlinico Universitario ‘A. Gemelli’ IRCCS‐Università Cattolica del Sacro CuoreRomeItaly
| | - A. Vidiri
- Dipartimento Scienze della Salute della Donna e del Bambino e di Sanità PubblicaFondazione Policlinico Universitario ‘A. Gemelli’ IRCCS‐Università Cattolica del Sacro CuoreRomeItaly
| | - E. Fabbri
- Obstetrics and Gynecology UnitBuzzi Children's Hospital, University of MilanMilanItaly
| | - E. Ferrazzi
- Fondazione IRCCS Ca Granda Ospedale Maggiore PoliclinicoMilano, Unit of ObstetricsMilanItaly
- Department of Clinical and Community SciencesUniversity of MilanMilanItaly
| | - V. Maggi
- Fondazione IRCCS Ca Granda Ospedale Maggiore PoliclinicoMilano, Unit of ObstetricsMilanItaly
| | - I. Cetin
- Obstetrics and Gynecology UnitBuzzi Children's Hospital, University of MilanMilanItaly
| | - T. Frusca
- Department of Medicine and Surgery, Obstetrics and Gynaecology UnitUniversity of ParmaParmaItaly
| | - T. Ghi
- Department of Medicine and SurgeryUniversity of ParmaParmaItaly
| | - C. Kaihura
- Department of Medicine and Surgery, Obstetrics and Gynaecology UnitUniversity of ParmaParmaItaly
| | - E. Di Pasquo
- Department of Medicine and Surgery, Obstetrics and Gynaecology UnitUniversity of ParmaParmaItaly
| | - T. Stampalija
- Unit of Fetal Medicine and Prenatal DiagnosisInstitute for Maternal and Child Health, IRCCS Burlo GarofoloTriesteItaly
- Department of Medical, Surgical and Health ScienceUniversity of TriesteTriesteItaly
| | - C. Belcaro
- Unit of Fetal Medicine and Prenatal DiagnosisInstitute for Maternal and Child Health, IRCCS Burlo GarofoloTriesteItaly
| | - M. Quadrifoglio
- Unit of Fetal Medicine and Prenatal DiagnosisInstitute for Maternal and Child Health, IRCCS Burlo GarofoloTriesteItaly
| | - M. Veneziano
- Obstetrics and Gynecology UnitBolzano HospitalBolzanoItaly
| | - F. Mecacci
- Department of Woman and Child's HealthCareggi University HospitalFlorenceItaly
| | - S. Simeone
- Department of Woman and Child's HealthCareggi University HospitalFlorenceItaly
| | - A. Locatelli
- University of Milan‐Bicocca, School of Medicine and Surgery, Obstetrics and Gynecology Unit, Carate Brianza Hospital, ASST BrianzaCarate BrianzaItaly
| | - S. Consonni
- Obstetrics and Gynecology Unit, Carate Brianza Hospital, ASST BrianzaCarate BrianzaItaly
| | - N. Chianchiano
- Fetal Medicine Unit, Bucchieri La Ferla–Fatebenefratelli HospitalPalermoItaly
| | - F. Labate
- Department of Obstetrics and GynaecologyAzienda Ospedaliera Villa Sofia CervelloPalermoItaly
| | - A. Cromi
- Department of Medicine and SurgeryUniversity of InsubriaVareseItaly
| | - E. Bertucci
- Obstetrics and Gynecology Unit, Department of Medical and Surgical Sciences for Children and AdultsUniversity of Modena and Reggio Emilia School of MedicineModenaItaly
| | - F. Facchinetti
- Obstetrics and Gynecology Unit, Department of Medical and Surgical Sciences for Children and AdultsUniversity of Modena and Reggio Emilia School of MedicineModenaItaly
| | - A. Fichera
- Division of Obstetrics and Gynecology, ASST Spedali Civili, Department of Clinical and Experimental SciencesUniversity of BresciaBresciaItaly
| | - D. Granata
- Obstetrics and Gynecology UnitBolognini HospitalSeriateItaly
| | - F. D'Antonio
- Center for Fetal Care and High‐Risk Pregnancy, Department of Obstetrics and GynecologyUniversity of ChietiChietiItaly
| | - F. Foti
- Obstetrics and Gynecology Unit, Civico Hospital of PartinicoPalermoItaly
| | - L. Avagliano
- Department of Health SciencesUniversità degli Studi di MilanoMilanItaly
| | - G. P. Bulfamante
- Department of Health SciencesUniversità degli Studi di MilanoMilanItaly
| | - G. Calì
- Department of Obstetrics and GynaecologyArnas Civico HospitalPalermoItaly
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10
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Boriani G, Pisano' E, Pieragnoli P, Locatelli A, Capucci A, Talarico A, Zecchin M, Rapacciuolo A, Piacenti M, Indolfi C, Arias M, Diemberger I, Checchinato C, D'Onofrio A. Implantable defibrillator-computed respiratory disturbance index predicts new-onset atrial fibrillation: the DASAP-HF study. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0424] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Sleep apnea (SA), as measured by polysomnography, is a risk factor for atrial fibrillation (AF). The DASAP-HF study previously demonstrated that the Respiratory Disturbance Index (RDI) computed by an implantable cardioverter defibrillator (ICD) algorithm accurately identifies severe SA, is associated with cardiovascular events, and independently predicts death.
Purpose
In the present analysis we tested the hypothesis that device-detected RDI could also predict AF burden.
Methods
Patients with left ventricular ejection fraction ≤35% implanted with an ICD were enrolled and followed-up for 24 months. One month after implantation, patients underwent a polysomnographic study. The weekly average RDI value was considered, as calculated by the algorithm during the entire follow-up period and over a 1 week period preceding the sleep study, and patients were stratified according to an RDI value ≥ or <30 episodes/hour. The endpoints were: daily AF burden of ≥5 minutes, ≥6 hours, ≥23 hours.
Results
164 enrolled patients had usable RDI values during the entire follow-up period. Severe SA (RDI≥30 episodes/h) was diagnosed in 92 (56%) patients at the time of the polysomnographic study. During a median follow-up of 25 months, AF burden ≥5 minutes/day was documented in 70 (43%), ≥6 hours/day in 48 (29%), and ≥23 hours/day in 33 (20%) patients. Device-detected RDI≥30 episodes/h at the time of the polysomnographic study, as well as the polysomnography-measured apnea hypopnea index ≥30 episodes/h, were not associated with the occurrence of the endpoints, using a Cox regression model. However, using time-dependent Cox model continuously measured weekly average RDI≥30episodes/h was independently associated with AF burden ≥5 minutes/day (HR: 2.13, 95% CI: 1.24–3.65, p=0.006), ≥6 hours/day (HR: 2.75, 95% CI: 1.37–5.49, p=0.004), and ≥23 hours/day (HR: 2.26, 95% CI: 1.05–4.86, p=0.037), after correction for history of AF, left atrial diameter, and gender.
Conclusions
In heart failure patients implanted with an ICD, device-diagnosed severe SA is associated with a higher risk of AF. In particular, severe SA on follow-up data review identifies patients who are from two- to three-fold more likely to experience an AF episode, according to various thresholds of daily AF burden.
Funding Acknowledgement
Type of funding sources: Private grant(s) and/or Sponsorship. Main funding source(s): Promoted by the Italian Heart Rhythm Society (AIAC).Supported by a research grant from Boston Scientific.
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Affiliation(s)
- G Boriani
- University of Modena & Reggio Emilia, Modena, Italy
| | | | | | | | - A Capucci
- Marche Polytechnic University of Ancona, Ancona, Italy
| | | | - M Zecchin
- Azienda Sanitaria Universitaria Integrata di Trieste, Trieste, Italy
| | | | - M Piacenti
- Fondazione Toscana Gabriele Monasterio, Pisa, Italy
| | - C Indolfi
- Magna Graecia University of Catanzaro, Catanzaro, Italy
| | - M.A Arias
- Hospital Virgen de la Salud, Toledo, Spain
| | - I Diemberger
- Azienda Ospedaliero, Universitaria di Bologna, Policlinico S.Orsola-Malpigh, Bologna, Italy
| | - C Checchinato
- Santa Croce Hospital of Moncalieri, Moncalieri, Italy
| | - A D'Onofrio
- AO dei Colli-Monaldi Hospital, Naples, Italy
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11
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Dugo M, Gyorffy B, Bisagni G, Colleoni M, Mansutti M, Zamagni C, Del Mastro L, Zambelli S, Frassoldati A, Licata L, Galbardi B, Biasi O, Viganò L, Locatelli A, Viale G, Valagussa P, Viale G, Callari M, Gianni L, Bianchini G. 141P Gene-expression pathways and dynamics during neoadjuvant chemo-free therapy predict pathologic complete response in ER+/HER2+ breast cancer (BC). Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.422] [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: 10/20/2022] Open
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12
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Abed Alla S, Locatelli A, Losio S, Allevi G. Surgical removal of a sewing needle penetrated through the foramen lacerum into a canine brain. J Small Anim Pract 2021; 63:78-81. [PMID: 34109622 DOI: 10.1111/jsap.13391] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 05/12/2021] [Accepted: 05/24/2021] [Indexed: 01/09/2023]
Abstract
An intracranial metallic foreign body (sewing needle) was diagnosed in an 11-month-old Cavalier King Charles Spaniel. Clinical evaluation showed drooling and chewing, but an otherwise normal neurological examination. Skull radiographs showed a metallic foreign body extending from the pharynx into the skull. A CT scan confirmed the presence of a foreign body crossing the right foramen lacerum into the brain. The needle was removed surgically with the aid of fluoroscopy.
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Affiliation(s)
- S Abed Alla
- Ospedale Veterinario Città di Bergamo, Bergamo, Italy
| | - A Locatelli
- Ospedale Veterinario Città di Bergamo, Bergamo, Italy
| | - S Losio
- Ospedale Veterinario Città di Bergamo, Bergamo, Italy
| | - G Allevi
- Ospedale Veterinario Città di Bergamo, Bergamo, Italy
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13
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Gili VF, Carletti L, Locatelli A, Rocco D, Finazzi M, Ghirardini L, Favero I, Gomez C, Lemaître A, Celebrano M, De Angelis C, Leo G. Monolithic AlGaAs second-harmonic nanoantennas: erratum. Opt Express 2021; 29:11132. [PMID: 33820231 DOI: 10.1364/oe.425110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Indexed: 06/12/2023]
Abstract
Figure 1(b) in [V. F. Gili et al, Opt. Express24, 15965 (2016)10.1364/OE.24.015965] is corrupted and is corrected in this erratum.
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14
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Chiossi G, Facchinetti F, Vergani P, Di Tommaso M, Marozio L, Acaia B, Pignatti L, Locatelli A, Spitaleri M, Benedetto C, Zaina B, D'Amico R. Serial cervical-length measurements after first episode of threatened preterm labor improve prediction of spontaneous delivery prior to 37 weeks' gestation. Ultrasound Obstet Gynecol 2021; 57:298-304. [PMID: 32851714 DOI: 10.1002/uog.22188] [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: 07/04/2020] [Revised: 08/10/2020] [Accepted: 08/18/2020] [Indexed: 06/11/2023]
Abstract
OBJECTIVE To assess whether repeat cervical-length (CL) measurement in women discharged from hospital after their first episode of threatened preterm labor can predict their risk of spontaneous preterm birth. METHODS This was a secondary analysis of a randomized controlled trial of maintenance tocolysis, in which CL was measured on transvaginal ultrasound at the time of hospital discharge and after 2, 4, 8 and 12 weeks, in women who remained undelivered after their first episode of threatened preterm labor. After univariate analysis, multivariate logistic regression analysis was used to assess whether CL < 10 mm at the time of hospital discharge or at any follow-up evaluation could predict spontaneous delivery prior to 37 weeks of gestation. RESULTS Of 226 women discharged after a diagnosis of threatened preterm labor, 57 (25.2%) delivered spontaneously prior to 37 weeks' gestation. The risk of spontaneous preterm birth was higher among women with CL < 10 mm at hospital discharge compared to those with CL ≥ 10 mm (adjusted odds ratio (aOR), 3.3; 95% CI, 1.2-9.2). Moreover, spontaneous preterm delivery was more common when CL < 10 mm was detected up to 2 weeks (aOR, 2.9; 95% CI, 1.1-7.3) or up to 4 weeks (aOR, 7.3; 95% CI, 2.3-22.8) post discharge, as compared with when CL was persistently ≥ 10 mm. The association was not significant when considering CL measurements at 8 weeks, and there was insufficient information to assess the effect of measurements obtained at 12 weeks. CONCLUSIONS Women who remain undelivered after their first episode of threatened preterm labor continue to be at high risk of spontaneous preterm birth if their CL is below 10 mm at the time of hospital discharge or at any follow-up visit up to 4 weeks later. CL measurement could be included in the antenatal care of these women in order to stratify their risk of preterm birth, rationalize resource utilization and help clinicians improve pregnancy outcome. © 2020 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- G Chiossi
- Division of Obstetrics, Department of Medical and Surgical Sciences for Mother, Child and Adult, University of Modena and Reggio Emilia, Modena, Italy
| | - F Facchinetti
- Division of Obstetrics, Department of Medical and Surgical Sciences for Mother, Child and Adult, University of Modena and Reggio Emilia, Modena, Italy
| | - P Vergani
- Department of Medicine and Surgery, Obstetrics and Gynecology Branch, University of Milano-Bicocca Health Science, Milan, Italy
| | - M Di Tommaso
- Health Science Department, Obstetrics and Gynecology Branch, University of Florence, Florence, Italy
| | - L Marozio
- Department of Surgical Sciences, Gynecology and Obstetrics 1, University of Turin, Turin, Italy
| | - B Acaia
- Department of Medicine and Surgery, Obstetrics and Gynecology Branch, University of Milano-Bicocca Health Science, Milan, Italy
| | - L Pignatti
- Division of Obstetrics, Department of Medical and Surgical Sciences for Mother, Child and Adult, University of Modena and Reggio Emilia, Modena, Italy
| | - A Locatelli
- Department of Medicine and Surgery, Obstetrics and Gynecology Branch, University of Milano-Bicocca Health Science, Milan, Italy
| | - M Spitaleri
- Health Science Department, Obstetrics and Gynecology Branch, University of Florence, Florence, Italy
| | - C Benedetto
- Department of Surgical Sciences, Gynecology and Obstetrics 1, University of Turin, Turin, Italy
| | - B Zaina
- Department of Medicine and Surgery, Obstetrics and Gynecology Branch, University of Milano-Bicocca Health Science, Milan, Italy
| | - R D'Amico
- Statistics Unit, Department of Diagnostic and Clinical Medicine and Public Health, University of Modena and Reggio Emilia, Modena, Italy
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15
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Schöbitz M, De Riz A, Martin S, Bochmann S, Thirion C, Vogel J, Foerster M, Aballe L, Menteş TO, Locatelli A, Genuzio F, Le-Denmat S, Cagnon L, Toussaint JC, Gusakova D, Bachmann J, Fruchart O. Erratum: Fast Domain Wall Motion Governed by Topology and Œrsted Fields in Cylindrical Magnetic Nanowires [Phys. Rev. Lett. 123, 217201 (2019)]. Phys Rev Lett 2020; 125:249901. [PMID: 33412077 DOI: 10.1103/physrevlett.125.249901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Indexed: 06/12/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.123.217201.
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16
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Boriani G, D'Onofrio A, Pisano E, Pieragnoli P, Locatelli A, Capucci A, Talarico A, Sinagra G, Rapacciuolo A, Piacenti M, Indolfi C, Checchinato C, Ricci R. ICD-detected respiratory disturbance index: accuracy for sleep apnea detection and prognostic value. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0747] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Purpose
In patients affected by heart failure an association exists between sleep apnea (SA) measured by polysomnography and adverse outcome. Impedance-based implantable cardioverter defibrillator (ICD) algorithms have been designed to compute the Respiratory Disturbance Index (RDI) to identify severe SA. The purpose of the DASAP-HF study was to evaluate the accuracy of RDI for the prediction of severe SA, and investigate the prognostic value of device-detected RDI values.
Methods
Patients with left ventricular ejection fraction ≤35% implanted with an ICD were enrolled and followed for 24 months. One month after implantation, patients underwent a polysomnographic study (PS) for assessing the apnea-hypopnea index (AHI). The average RDI value was calculated over a 1-week period preceding the sleep study and compared with the assessment of severe SA at PS (AHI ≥30 episodes/h). The endpoint was all-cause death after 24 months.
Results
224 out of 265 enrolled patients had usable RDI values. Patients characteristics: 79% male, 67±10 years, BMI 27±7kg/m2, ejection fraction 29±5%, 54% ischemic cardiomyopathy, 50% CRT-D. The mean AHI value at PS was 21±15 episodes/h. The mean RDI value recorded during the week preceding PS was 30±16 episodes/h. RDI values accurately identified severe SA diagnosed at PS (AUC 0.77; 95% CI 0.70–0.83; P=0.001). Based on the ROC curve analysis, RDI ≥29 episodes/h and AHI ≥17 episodes/h maximized sensitivity and specificity for the prediction of death. Both indexes were independently associated with all-cause death but, after correction for the other independent significant prognostic variables, RDI≥29episodes/h yielded stronger prediction (HR: 12.22, 95% CI:1.64–91.37, p=0.015) as compared to AHI ≥17episodes/h (HR: 4.14, 95% CI:1.17–14.66, p=0.028). Moreover, severe SA diagnosed at PS (AHI ≥30episodes/h) was not associated with death (HR: 1.20, 95% CI:0.3817–3.8266, p=0.761).
Conclusions
In heart failure patients indicated to ICD, severe SA was confirmed to be associated with survival. The ICD-measured RDI accurately identified severe SA detected at PS, and was associated with the risk of death at long-term.
Funding Acknowledgement
Type of funding source: Private company. Main funding source(s): Boston Scientific
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Affiliation(s)
- G Boriani
- University of Modena & Reggio Emilia, Div. Cardiology, Modena, Italy
| | - A D'Onofrio
- AORN Ospedali dei Colli - Monaldi Hospital, Naples, Italy
| | - E Pisano
- Vito Fazzi Hospital, Lecce, Italy
| | | | | | - A Capucci
- Marche Polytechnic University of Ancona, Ancona, Italy
| | | | - G Sinagra
- University of Trieste, Trieste, Italy
| | | | - M Piacenti
- Fondazione Toscana Gabriele Monasterio, Pisa, Italy
| | - C Indolfi
- Magna Graecia University of Catanzaro, Catanzaro, Italy
| | - C Checchinato
- Santa Croce Hospital of Moncalieri, Moncalieri, Italy
| | - R.P Ricci
- Italian Heart Rhythm Society (AIAC), Rome, Italy
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17
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Slęzak M, Dróżdż P, Janus W, Nayyef H, Kozioł-Rachwał A, Szpytma M, Zając M, Menteş TO, Genuzio F, Locatelli A, Slęzak T. Correction: Fine tuning of ferromagnet/antiferromagnet interface magnetic anisotropy for field-free switching of antiferromagnetic spins. Nanoscale 2020; 12:19477. [PMID: 32959041 DOI: 10.1039/d0nr90207a] [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] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Correction for 'Fine tuning of ferromagnet/antiferromagnet interface magnetic anisotropy for field-free switching of antiferromagnetic spins' by M. Slęzak et al., Nanoscale, 2020, DOI: 10.1039/d0nr04193a.
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Affiliation(s)
- M Slęzak
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - P Dróżdż
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - W Janus
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - H Nayyef
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - A Kozioł-Rachwał
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - M Szpytma
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - M Zając
- National Synchrotron Radiation Centre SOLARIS, Jagiellonian University, Kraków, Poland
| | - T O Menteş
- Elettra - Sincrotrone Trieste, Basovizza, Trieste, Italy
| | - F Genuzio
- CERIC-ERIC, Basovizza, Trieste, Italy
| | - A Locatelli
- Elettra - Sincrotrone Trieste, Basovizza, Trieste, Italy
| | - T Slęzak
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
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18
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Slęzak M, Dróżdż P, Janus W, Nayyef H, Kozioł-Rachwał A, Szpytma M, Zając M, Menteş TO, Genuzio F, Locatelli A, Slęzak T. Fine tuning of ferromagnet/antiferromagnet interface magnetic anisotropy for field-free switching of antiferromagnetic spins. Nanoscale 2020; 12:18091-18095. [PMID: 32856646 DOI: 10.1039/d0nr04193a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We show that in a uniform thickness NiO(111)/Fe(110) epitaxial bilayer system, at given temperature near 300 K, two magnetic states with orthogonal spin orientations can be stabilized in antiferromagnetic NiO. Field-free, reversible switching between these two antiferromagnetic states is demonstrated. The observed phenomena arise from the unique combination of precisely tuned interface magnetic anisotropy, thermal hysteresis of spin reorientation transition and interfacial ferromagnet/antiferromagnet exchange coupling. The possibility of field-free switching between two magnetic states in an antiferromagnet is fundamentally interesting and can lead to new ideas in heat assisted magnetic recording technology.
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Affiliation(s)
- M Slęzak
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - P Dróżdż
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - W Janus
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - H Nayyef
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - A Kozioł-Rachwał
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - M Szpytma
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
| | - M Zając
- National Synchrotron Radiation Centre SOLARIS, Jagiellonian University, Kraków, Poland
| | - T O Menteş
- Elettra - Sincrotrone Trieste, Basovizza, Trieste, Italy
| | - F Genuzio
- Elettra - Sincrotrone Trieste, Basovizza, Trieste, Italy
| | - A Locatelli
- Elettra - Sincrotrone Trieste, Basovizza, Trieste, Italy
| | - T Slęzak
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
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19
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Moscheni M, Vergani P, Cetin I, Cromi A, Ghezzi F, Locatelli A, Iurlano E, Marconi A, Auxilia F, Bevilacqua L, Dell'Oro S, Picchetti CM, Scotti L, Trivelli M, Burato E. [The use of RCGO triggers in the obstetric - gynecological procedures: the impact on the reduction of adeverse events. The experience of the Lombardia Region]. Ig Sanita Pubbl 2020; 76:241-255. [PMID: 33161421] [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] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The last few weeks of pregnancy are critical to a baby's health because important organs, including the brain and lungs, are not completely developed until the end of pregnancy. The adverse events during labor and childbirth can have very serious physical, psychological and financial consequences for the child, the family, health professionals and the whole community. These events can be reduced through interventions aimed at improving the safety and quality of care, based on evidence-based knowledge, guidelines and practices that must be widely and effectively applied. This work reports the experience of the Lombardy Region on improvement actions in the obstetric and gynecological procedures for the reduction of adverse events and sentinel events through the monitoring and management of the RCGS trigger tool.
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Affiliation(s)
- M Moscheni
- Coordinatore del Gruppo di Lavoro regionale Trigger in sala parto
| | - P Vergani
- Direttore della Scuola di Specialità di Ostetricia e Ginecologia Università degli Studi di Milano Bicocca
| | - I Cetin
- Professore Ordinario di Ostetricia e Ginecologia, Università degli Studi di Milano
| | - A Cromi
- Professore Associato Ostetricia e Ginecologia Università degli Studi dell'Insubria
| | - F Ghezzi
- Professore Ordinario di Ostetricia e Ginecologia, Università degli Studi dell'Insubria
| | - A Locatelli
- Direttore S.C. Ostetricia e Ginecologia ASST Vimercate
| | - E Iurlano
- Dirigente Medico. Responsabile Sala Parto IRCCS Policlinico Milano
| | - A Marconi
- Professore Ordinario di Ostetricia e Ginecologia, Università degli Studi di Milano
| | - F Auxilia
- Risk Manager, ASST Fatebenefratelli Sacco
| | | | - S Dell'Oro
- Scuola di Specializzazione in Ostetricia e Ginecologia Università degli studi Milano Biccocca
| | - C M Picchetti
- Centro Regionale gestione del rischio in sanità e sicurezza del paziente, DG Welfare - Regione Lombardia
| | - L Scotti
- Centro Regionale gestione del rischio in sanità e sicurezza del paziente, DG Welfare - Regione Lombardia
| | - M Trivelli
- Direttore DG Welfare - Regione Lombardia
| | - E Burato
- Coordinatore Centro Regionale gestione del rischio in sanità e sicurezza del paziente, DG Welfare - Regione Lombardia
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20
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Menteş TO, Genuzio F, Schánilec V, Sadílek J, Rougemaille N, Locatelli A. Coherent x-ray scattering in an XPEEM setup. Ultramicroscopy 2020; 216:113035. [PMID: 32544784 DOI: 10.1016/j.ultramic.2020.113035] [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: 02/23/2020] [Revised: 05/17/2020] [Accepted: 05/24/2020] [Indexed: 11/19/2022]
Abstract
X-ray photoemission electron microscopy, one of the most successful imaging tools at synchrotrons, is known to have limitations related to the application of external fields and to the short electron mean free path. In order to overcome such issues, we adapt an existing XPEEM instrument to simultaneously perform coherent x-ray scattering measurements in reflectivity mode, thus adding a complementary method to XPEEM. Photon-in photon-out x-ray scattering provides the sensitivity to buried interfaces as well as the possibility to work under external fields, which is challenging when using charged particles for imaging. XPEEM, in turn, greatly alleviates the difficulties associated with the reconstruction methods used in coherent diffraction imaging. The combination of the two methods is demonstrated for an artifical spin-ice lattice showing both chemical and magnetic contrast.
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Affiliation(s)
- T O Menteş
- Sincrotrone Trieste S.C.p.A., Basovizza-Trieste 34149, Italy.
| | - F Genuzio
- Sincrotrone Trieste S.C.p.A., Basovizza-Trieste 34149, Italy
| | - V Schánilec
- Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut NÉEL, Grenoble 38000, France; Central European Institute of Technology, CEITEC BUT, Brno University of Technology, Purkyňova 123, Brno 612 00, Czech Republic
| | - J Sadílek
- Central European Institute of Technology, CEITEC BUT, Brno University of Technology, Purkyňova 123, Brno 612 00, Czech Republic
| | - N Rougemaille
- Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut NÉEL, Grenoble 38000, France
| | - A Locatelli
- Sincrotrone Trieste S.C.p.A., Basovizza-Trieste 34149, Italy
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21
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Schöbitz M, De Riz A, Martin S, Bochmann S, Thirion C, Vogel J, Foerster M, Aballe L, Menteş TO, Locatelli A, Genuzio F, Le-Denmat S, Cagnon L, Toussaint JC, Gusakova D, Bachmann J, Fruchart O. Fast Domain Wall Motion Governed by Topology and Œrsted Fields in Cylindrical Magnetic Nanowires. Phys Rev Lett 2019; 123:217201. [PMID: 31809154 DOI: 10.1103/physrevlett.123.217201] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Indexed: 05/26/2023]
Abstract
While the usual approach to tailor the behavior of condensed matter and nanosized systems is the choice of material or finite-size or interfacial effects, topology alone may be the key. In the context of the motion of magnetic domain walls (DWs), known to suffer from dynamic instabilities with low mobilities, we report unprecedented velocities >600 m/s for DWs driven by spin-transfer torques in cylindrical nanowires made of a standard ferromagnetic material. The reason is the robust stabilization of a DW type with a specific topology by the Œrsted field associated with the current. This opens the route to the realization of predicted new physics, such as the strong coupling of DWs with spin waves above >600 m/s.
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Affiliation(s)
- M Schöbitz
- Univ. Grenoble Alpes, CNRS, CEA, Spintec, 38054 Grenoble, France
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Inorganic Chemistry, 91058 Erlangen, Germany
- Univ. Grenoble Alpes, CNRS, Institut Néel, 38042 Grenoble, France
| | - A De Riz
- Univ. Grenoble Alpes, CNRS, CEA, Spintec, 38054 Grenoble, France
| | - S Martin
- Univ. Grenoble Alpes, CNRS, CEA, Spintec, 38054 Grenoble, France
- Univ. Grenoble Alpes, CNRS, Institut Néel, 38042 Grenoble, France
| | - S Bochmann
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Inorganic Chemistry, 91058 Erlangen, Germany
| | - C Thirion
- Univ. Grenoble Alpes, CNRS, Institut Néel, 38042 Grenoble, France
| | - J Vogel
- Univ. Grenoble Alpes, CNRS, Institut Néel, 38042 Grenoble, France
| | - M Foerster
- Alba Synchrotron Light Facility, CELLS, 08290 Barcelona, Spain
| | - L Aballe
- Alba Synchrotron Light Facility, CELLS, 08290 Barcelona, Spain
| | - T O Menteş
- Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - A Locatelli
- Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - F Genuzio
- Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - S Le-Denmat
- Univ. Grenoble Alpes, CNRS, Institut Néel, 38042 Grenoble, France
| | - L Cagnon
- Univ. Grenoble Alpes, CNRS, Institut Néel, 38042 Grenoble, France
| | - J C Toussaint
- Univ. Grenoble Alpes, CNRS, Institut Néel, 38042 Grenoble, France
| | - D Gusakova
- Univ. Grenoble Alpes, CNRS, CEA, Spintec, 38054 Grenoble, France
| | - J Bachmann
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Inorganic Chemistry, 91058 Erlangen, Germany
- Institute of Chemistry, Saint Petersburg State University, St. Petersburg 198504, Russia
| | - O Fruchart
- Univ. Grenoble Alpes, CNRS, CEA, Spintec, 38054 Grenoble, France
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22
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Hajiri T, Baldrati L, Lebrun R, Filianina M, Ross A, Tanahashi N, Kuroda M, Gan WL, Menteş TO, Genuzio F, Locatelli A, Asano H, Kläui M. Spin structure and spin Hall magnetoresistance of epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO 3. J Phys Condens Matter 2019; 31:445804. [PMID: 31392970 DOI: 10.1088/1361-648x/ab303c] [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] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report a combined study of imaging the antiferromagnetic (AFM) spin structure and measuring the spin Hall magnetoresistance (SMR) in epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO3. X-ray magnetic linear dichroism photoemission electron microscopy measurements reveal that the AFM spins of the SmFeO3(1 1 0) align in the plane of the film. Angularly dependent magnetoresistance measurements show that SmFeO3/Ta bilayers exhibit a positive SMR, in contrast to the negative SMR expected in previously studied collinear AFMs. The SMR amplitude increases linearly with increasing external magnetic field at higher magnetic fields, suggesting that field-induced canting of the AFM spins plays an important role. In contrast, around the coercive field, no detectable SMR signal is observed, indicating that the SMR of the AFM and canting magnetization components cancel out. Below 50 K, the SMR amplitude increases sizably by a factor of two as compared to room temperature, which likely correlates with the long-range ordering of the Sm ions. Our results show that the SMR is a sensitive technique for non-equilibrium spin systems of non-collinear AFMs.
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Affiliation(s)
- T Hajiri
- Department of Materials Physics, Nagoya University, Nagoya 464-8603, Japan
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23
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Rossini R, Masiero G, Fruttero C, Passamonti E, Calvaruso E, Cecconi M, Carlucci C, Barzaghi N, Locatelli A, Mojoli M, Parodi G, Talanas G, Pierini S, Angiolillo D, Musumeci G. P2815Antiplatelet therapy with cangrelor in patients undergoing surgery after coronary stent implantation: a real-world bridging protocol experience. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.1127] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Perioperative management of dual antiplatelet therapy (DAPT) after percutaneous coronary intervention (PCI) in patients deemed at high thrombotic risk undergoing non-deferrable surgery remains poorly defined. Cangrelor represents a potential treatment option as a “bridge” from discontinuation of oral P2Y12 receptor antagonists to surgical procedures, but data in this setting are still scant.
Purpose
We sought to describe a real-world experience of a bridging protocol using cangrelor for patients referred to relevant bleeding risk surgery requiring withdrawal of DAPT.
Methods
We collected data from 7 Italian centers on patients with previous PCI, still on DAPT, undergoing non-deferrable surgery which required discontinuation of one or both antiplatelet agents. A standardized bridging protocol using cangrelor infusion before and eventually after surgery was applied (Figure 1).
Results
Between December 2017 and January 2019, a total of 18 patients (mean age 70±10 years; male 85%) were enrolled. In the majority (89%) of patients, the index PCI was performed due to acute coronary syndrome (ACS) and 2±1.7 stents per patient were implanted. All patients required non-deferrable, intermediate-high bleeding risk surgery as pulmonary lobectomy, colectomy, endoscopic bladder surgery, paranasal sinus surgery, coronary artery by-pass surgery and valvular repair, hip replacement, endoscopy sphincterotomy. High thrombotic risk categories included PCI time <1 month, SCA time <3 months, stent failure occurrence, previous Absorb BVS implantation. Due to the surgical bleeding risk, discontinuation of P2Y12 inhibitor was required 5 days before surgery (ticagrelor, n=13; prasugrel=1; clopidogrel, n=5). All patients but 1 maintained aspirin through the perioperative phase. Cangrelor infusion was started at a bridging dose (0.75 mcg/kg/min) 3 days before planned surgery and was discontinued 6.9±1.5 hours before. After surgery, drainages were left in all patients but 3. In 56% of patients, cangrelor was resumed within 24 hours from surgery (mean time 9±7 hours) for a mean of 36±38 hours. Drainages were removed after discontinuation of cangrelor, in order to reduce bleeding complications. Within 2 hours from post-operative cangrelor discontinuation, a 300 mg clopidogrel loading dose was administered. No major ischemic adverse outcomes occurred during hospital stay and up to 30 days follow-up. The mean Hb drop was 2±1.8 g/dl, 7 patients received blood transfusions consistent with the type of surgeries and no life-threatening or fatal bleeding occurred.
Figure 1. Standardized bridging protocol.
Conclusions
Peri-operative bridge therapy with cangrelor is a feasible approach for stented patients at high thrombotic risk referred to non-deferrable surgery requiring DAPT discontinuation. Larger studies are warranted to support the safety of this strategy.
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Affiliation(s)
- R Rossini
- Santa Croce E Carle Hospital, Cuneo, Italy
| | - G Masiero
- Santa Croce E Carle Hospital, Cuneo, Italy
| | - C Fruttero
- Santa Croce E Carle Hospital, Cuneo, Italy
| | | | | | - M Cecconi
- Hospital of Civitanova Marche, Civitanova Marche, Italy
| | - C Carlucci
- Hospital of Civitanova Marche, Civitanova Marche, Italy
| | - N Barzaghi
- Santa Croce E Carle Hospital, Cuneo, Italy
| | | | - M Mojoli
- Santa Maria degli Angeli Hospital, Pordenone, Italy
| | - G Parodi
- University of Sassari, Sassari, Italy
| | - G Talanas
- University of Sassari, Sassari, Italy
| | - S Pierini
- P.O. BASSINI - ASST Nord Milano, Milano, Italy
| | - D Angiolillo
- College of Medicine-Jacksonville, Jacksonville, United States of America
| | - G Musumeci
- Santa Croce E Carle Hospital, Cuneo, Italy
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24
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Rothrock MJ, Locatelli A, Feye KM, Caudill AJ, Guard J, Hiett K, Ricke SC. A Microbiomic Analysis of a Pasture-Raised Broiler Flock Elucidates Foodborne Pathogen Ecology Along the Farm-To-Fork Continuum. Front Vet Sci 2019; 6:260. [PMID: 31448296 PMCID: PMC6692657 DOI: 10.3389/fvets.2019.00260] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 08/24/2018] [Accepted: 07/24/2019] [Indexed: 01/09/2023] Open
Abstract
While conventionally grown poultry continues to dominate the U. S. poultry industry, there is an increasing demand for locally-grown, "all natural" alternatives. The use of next generation sequencing allows for not only the gross (e.g., community structure) but also fine-scale (e.g., taxa abundances) examination of these complex microbial communities. This data provides a better understanding of how a pasture flock's microbiome changes throughout the production life cycle and how that change in microbial ecology changes foodborne pathogens in alternative poultry production systems. In order to understand this ecology better, pooled broiler samples were taken during the entire flock life cycle, from pre-hatch gastrointestinal samples (N = 12) to fecal samples from the brood (N = 5), and pasture (N = 10) periods. Additional samples were taken during processing, including skin and feather rinsates (N = 12), ceca (N = 12), and whole carcass rinses (N = 12), and finally whole carcasss rinsates of final products (N = 3). Genomic DNA was extracted, 16S rDNA microbiome sequencing was conducted (Illumina MiSeq), and microbiomes were analyzed and compared using QIIME 1.9.1 to determine how microbiomes shifted throughout production continuum, as well as what environmental factors may be influencing these shifts. Significant microbiome shifts occurred during the life cycle of the pasture broiler flock, with the brood and pasture fecal samples and cecal samples being very distinct from the other pre-hatch, processing, and final product samples. Throughout these varied microbiomes, there was a stable core microbiome containing 13 taxa. Within this core microbiome, five taxa represented known foodborne pathogens (Salmonella, Campylobacter) or potential/emerging pathogens (Pseudomonas, Enterococcus, Acinetobacter) whose relative abundances varied throughout the farm-to-fork continuum, although all were more prevalent in the fecal samples. Additionally, of the 25 physiochemical and nutrient variables measured from the fecal samples, the carbon to nitrogen ratio was one of the most significant variables to warrant further investigations because it impacted both general fecal microbial ecology and Campylobacter and Enterococcus taxa within the core fecal microbiomes. These findings demonstrate the need for further longitudinal, farm-to-fork studies to understand the ecology of the microbial ecology of pasture production flocks to improve animal, environmental, and public health.
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Affiliation(s)
- Michael J. Rothrock
- Egg Safety and Quality Research Unit, U. S. National Poultry Research Center, United States Department of Agriculture - Agricultural Research Service (USDA-ARS), Athens, GA, United States
| | - Aude Locatelli
- Egg Safety and Quality Research Unit, U. S. National Poultry Research Center, United States Department of Agriculture - Agricultural Research Service (USDA-ARS), Athens, GA, United States
| | - Kristina M. Feye
- Department of Food Science, Center for Food Safety, University of Arkansas, Fayetteville, AR, United States
| | - Andrew J. Caudill
- Department of Public Health, University of Georgia, Athens, GA, United States
| | - Jean Guard
- Egg Safety and Quality Research Unit, U. S. National Poultry Research Center, United States Department of Agriculture - Agricultural Research Service (USDA-ARS), Athens, GA, United States
| | - Kelli Hiett
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration (FDA), Laurel, MD, United States
| | - Steven C. Ricke
- Department of Food Science, Center for Food Safety, University of Arkansas, Fayetteville, AR, United States
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Rothrock MJ, Locatelli A. Importance of Farm Environment to Shape Poultry-Related Microbiomes Throughout the Farm-to-Fork Continuum of Pasture-Raised Broiler Flocks. Front Sustain Food Syst 2019. [DOI: 10.3389/fsufs.2019.00048] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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26
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Rothrock MJ, Feye KM, Kim SA, Park SH, Locatelli A, Hiett KL, Gamble J, Sellers H, Ricke SC. Semi-Quantification of Total Campylobacter and Salmonella During Egg Incubations Using a Combination of 16S rDNA and Specific Pathogen Primers for qPCR. Front Microbiol 2018; 9:2454. [PMID: 30455670 PMCID: PMC6230980 DOI: 10.3389/fmicb.2018.02454] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 06/28/2018] [Accepted: 09/25/2018] [Indexed: 01/09/2023] Open
Abstract
Rapid molecular techniques that evaluate eggs for the presence of foodborne pathogens is an essential component to poultry food safety monitoring. Interestingly, it is not just table eggs that contribute to outbreaks of foodborne disease. Broiler layer production actively contributes to sustaining of foodborne pathogens within a flock. The surface contamination of production eggs with invasive pathogens such as Salmonella enterica, Campylobacter jejuni, and Listeria monocytogenes during embryogenesis results in gastrointestinal tract (GIT) colonization. Pathogens that secure a niche within the GIT during embryonic development are nearly impossible to eradicate from the food chain. Therefore, current monitoring paradigms are not comprehensive because they fail to capture the presence of invasive pathogens within the embryonic GIT rapidly. By developing tools to recognize the pathogens' presence in the GIT during embryogenesis, producers are then able to spot evaluate broiler eggs for their potential risk as carriers of foodborne pathogens. In this study a novel qPCR assay was developed to semi-quantify pathogen load relative to total bacterial burden. Eggs sampled from three independent production broiler flocks of different ages were assayed for S. enterica (invA), C. jejuni (HipO), and L. monocytogenes (HlyA) against total microbial load (16s). The eggs were sampled at 1-day post-set within each flock, 2 weeks post-set, after vaccination (at 2.5 weeks) and 1-day post-hatch. The eggs were washed, and the yolk and embryonic chick GIT were collected. The DNA was extracted and subjected to a qPCR assay. The results confirm a novel technique for pathogen monitoring relative to total bacterial load and a unique method for monitoring the dynamics of foodborne pathogen invasion throughout broiler egg production.
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Affiliation(s)
- Michael J. Rothrock
- Egg Safety and Quality Research Unit, U.S. National Poultry Research Center, United States Department of Agriculture – Agricultural Research Service, Athens, GA, United States
| | - Kristina M. Feye
- Department of Food Science, University of Arkansas, Fayetteville, AR, United States
| | - Sun Ae Kim
- Department of Food Science and Engineering, Ewha Womans University, Seoul, South Korea
| | - Si Hong Park
- Department of Food Science and Technology, Oregon State University, Corvallis, OR, United States
| | - Aude Locatelli
- Egg Safety and Quality Research Unit, U.S. National Poultry Research Center, United States Department of Agriculture – Agricultural Research Service, Athens, GA, United States
| | - Kelli L. Hiett
- Poultry Management Safety and Processing Unit, U.S. National Poultry Research Center, United States Department of Agriculture – Agricultural Research Services, Athens, GA, United States
| | - John Gamble
- Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR, United States
| | - Holly Sellers
- Department of Veterinary Medicine, Poultry Diagnostic and Research Center, University of Georgia, Athens, GA, United States
| | - Steven C. Ricke
- Department of Food Science, University of Arkansas, Fayetteville, AR, United States
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27
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Gambacorti-Passerini ZM, Penati C, Carli A, Accordino F, Ferrari L, Berghella V, Locatelli A. Vaginal birth after prior myomectomy. Eur J Obstet Gynecol Reprod Biol 2018; 231:198-203. [PMID: 30396109 DOI: 10.1016/j.ejogrb.2018.10.007] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 09/28/2018] [Accepted: 10/01/2018] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The aim of this retrospective cohort study was to evaluate the obstetrical and perinatal outcomes of vaginal birth in case of pregnancies achieved after prior myomectomy. We also analyzed how operative characteristics at the time of surgery might influence the choice of obstetricians about mode of delivery. STUDY DESIGN We analyzed retrospectively all women who underwent laparoscopic (LPS) or laparotomic (LPT) myomectomy between January 2002 and December 2014, in a network of three Institutions belonging to the University of Milano Bicocca, Italy. Women were contacted by phone interview and only cases with available follow-up data and who had a subsequent pregnancy were included. Operative characteristics and subsequent obstetrical outcomes were recorded and analyzed. RESULTS 469 women who underwent myomectomy were contacted by phone interview, and 152 pregnancies were achieved after surgery, 96 after LPS and 56 after LPT. A total of 110 pregnancies ended in deliveries at ≥24 weeks. Seventy-three (66.4%) women had trial of labor after myomectomy (TOLAM), while 24 (21.8%) had a planned cesarean delivery (CD). Sixty-six (90.4%) of the TOLAM cases successfully accomplished vaginal delivery. No cases of uterine rupture (UR) were reported, and all deliveries ended in live births. The incidence of Neonatal Intensive Care Unit admission was 14.5% (16/110), with no cases of perinatal death. Comparing the surgical details at the time of myomectomy, the incidence of uterine cavity entered was significantly higher in planned CD group compared to TOLAM cases (p < 0.001). No other significant difference between the two groups was reported. CONCLUSIONS A successful vaginal delivery was accomplished by 90.4% of women who had TOLAM, without any case of UR or severe maternal and perinatal complications. TOLAM may be considered and offered as feasible and relatively safe option. Obstetricians' attitude toward mode of delivery after prior myomectomy seems to be influenced by the reported entry into the uterine cavity at the time of surgery.
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Affiliation(s)
| | - C Penati
- Department of Obstetrics and Gynecology, Carate Brianza Hospital, ASST Vimercate, Italy
| | - A Carli
- University of Milano Bicocca, Milan, Italy; Department of Obstetrics and Gynecology, San Gerardo Hospital - FMBBM, Monza, Italy
| | - F Accordino
- University of Milano Bicocca, Milan, Italy; Department of Obstetrics and Gynecology, San Gerardo Hospital - FMBBM, Monza, Italy
| | - L Ferrari
- Department of Obstetrics and Gynecology, San Gerardo Hospital, ASST Monza, Italy
| | - V Berghella
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA, United States
| | - A Locatelli
- University of Milano Bicocca, Milan, Italy; Department of Obstetrics and Gynecology, Carate Brianza Hospital, ASST Vimercate, Italy
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28
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Gast RK, Guard J, Guraya R, Locatelli A. Multiplication in Egg Yolk and Survival in Egg Albumen of Genetically and Phenotypically Characterized Salmonella Enteritidis Strains. J Food Prot 2018; 81:876-880. [PMID: 29714623 DOI: 10.4315/0362-028x.jfp-17-484] [Citation(s) in RCA: 5] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Prompt refrigeration of eggs to prevent the multiplication of Salmonella Enteritidis to high levels during storage is an important practice for reducing the risk of egg-transmitted human illness. The efficacy of egg refrigeration for achieving this goal depends on the interaction among the location of contamination, the ability of contaminant strains to survive or multiply, and the rate at which growth-restricting temperatures are attained. The present study assessed the significance of several characterized genetic and phenotypic properties for the capabilities of 10 Salmonella Enteritidis isolates to multiply rapidly in egg yolk and survive for several days in egg albumen during unrefrigerated (25°C) storage. The growth of small numbers of each Salmonella Enteritidis strain (approximately 101 CFU/mL) inoculated into egg yolk samples was determined after 6 and 24 h of incubation. The survival of larger numbers of Salmonella Enteritidis (approximately 105 CFU/mL) inoculated into albumen samples was determined at 24 and 96 h of incubation. In yolk, the inoculated Salmonella Enteritidis strains multiplied to mean levels of approximately 102.6 CFU/mL after 6 h of incubation and 108.3 CFU/mL after 24 h. In albumen, mean levels of approximately 104.6 CFU/mL Salmonella Enteritidis were maintained through 96 h. The concentrations of the various Salmonella strains after incubation in either yolk or albumen were distributed over relatively narrow ranges of values. Significant ( P < 0.01) differences observed among individual strains suggested that maintenance of the fimbrial gene sefD may have positive genetic selection value by improving fitness to grow inside egg yolk, whereas the antibiotic resistance gene blaTEM-1 tet(A) appeared to have negative genetic selection value by decreasing fitness to survive in egg albumen.
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Affiliation(s)
- Richard K Gast
- U.S. Department of Agriculture, Agricultural Research Service, U.S. National Poultry Research Center, 950 College Station Road, Athens, Georgia 30605, USA
| | - Jean Guard
- U.S. Department of Agriculture, Agricultural Research Service, U.S. National Poultry Research Center, 950 College Station Road, Athens, Georgia 30605, USA
| | - Rupa Guraya
- U.S. Department of Agriculture, Agricultural Research Service, U.S. National Poultry Research Center, 950 College Station Road, Athens, Georgia 30605, USA
| | - Aude Locatelli
- U.S. Department of Agriculture, Agricultural Research Service, U.S. National Poultry Research Center, 950 College Station Road, Athens, Georgia 30605, USA
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29
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Abstract
Testes of albino mice treated with 1–4 dimethansulfonoxybutane for different periods (15 and 30 days) and with different doses (25-50-100 γ) have been histologically studied. After 15 days treatment unsignificant lesions were observed independently of the employed dose, while after 30 days the seminiferous epithelium had disappeared and azoospermia with remarkable hyperplasia of the leydighian system were noticed. On the basis of the results obtained some considerations are exposed.
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Affiliation(s)
- A. Farinella
- dall'Istituto di Patologia Generale Veterinaria dell'Università di Milano, direttore Inc. prof. T. Baglioni
| | - A. Locatelli
- dall'Istituto di Patologia Generale Veterinaria dell'Università di Milano, direttore Inc. prof. T. Baglioni
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30
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Locatelli A, Lewis MA, Rothrock MJ. The Distribution of Listeria in Pasture-Raised Broiler Farm Soils Is Potentially Related to University of Vermont Medium Enrichment Bias toward Listeria innocua over Listeria monocytogenes. Front Vet Sci 2017; 4:227. [PMID: 29312967 PMCID: PMC5742580 DOI: 10.3389/fvets.2017.00227] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 09/28/2017] [Accepted: 12/11/2017] [Indexed: 11/29/2022] Open
Abstract
The occurrence of Listeria monocytogenes has been widely investigated in the poultry production chain from the processing plant to the final product. However, limited data are available on Listeria species, including Listeria monocytogenes, in the poultry farm environment. Therefore, fecal and soil samples from 37 pastured poultry flocks from 10 all-natural farms over 3 years were assessed to determine the prevalence and diversity of Listeria within these alternative poultry farm environments using standard cultural and molecular methods. Listeria species were isolated in 15% of poultry farm samples and included Listeria innocua (65.7%), L. monocytogenes (17.4%), and Listeria welshimeri (15.1%). Additional multiplex PCR serotyping showed group 1/2a-3a to be the most dominant L. monocytogenes serovar group. Based on these results, monoculture growth experiments were conducted on four Listeria soil isolates (three L. monocytogenes isolates representing the three recovered serovar groups and one L. innocua isolate) to determine if culture medium [tripticase soy broth (TSB) and University of Vermont modified Listeria enrichment broth (UVM)], inoculum concentration (102 or 105 CFU/ml), or incubation temperature (20, 30, and 42°C) differentially affected these Listeria species. Overall, very few significant growth differences were observed between the behavior of the three L. monocytogenes isolates (representing the three recovered serovar groups) under the growth conditions tested. Alternatively, at 30°C in UVM with the lower inoculum concentration, the L. innocua isolate had a significantly shorter lag phase than the L. monocytogenes isolates. In coculture growth studies under these same incubation conditions, the lag phase of L. innocua and L. monocytogenes was similar, but the final concentration of L. innocua was significantly higher than L. monocytogenes. However, cocultures in UVM for high inoculum concentration did not show preferential growth of L. innocua over L. monocytogenes. These results indicate that the use of UVM as an enrichment medium may preferentially allow L. innocua to outcompete L. monocytogenes at low concentrations, biasing the Listeria prevalence from these farm samples toward L. innocua and potentially underreporting the presence of L. monocytogenes in these environments.
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Affiliation(s)
- Aude Locatelli
- Egg Safety and Quality Research Unit, U.S. National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture, Athens, GA, United States
| | - Micah A. Lewis
- Quality and Safety Assessment Research Unit, U.S. National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture, Athens, GA, United States
| | - Michael J. Rothrock
- Egg Safety and Quality Research Unit, U.S. National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture, Athens, GA, United States
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31
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Hellal J, Burnol A, Locatelli A, Battaglia-Brunet F. Experimental Column Setup for Studying Anaerobic Biogeochemical Interactions Between Iron (Oxy)Hydroxides, Trace Elements, and Bacteria. J Vis Exp 2017. [PMID: 29286400 DOI: 10.3791/56240] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Fate and speciation of trace elements (TEs), such as arsenic (As) and mercury (Hg), in aquifers are closely related to physio-chemical conditions, such as redox potential (Eh) and pH, but also to microbial activities that can play a direct or indirect role on speciation and/or mobility. Indeed, some bacteria can directly oxidize As(III) to As(V) or reduce As(V) to As(III). Likewise, bacteria are strongly involved in Hg cycling, either through its methylation, forming the neurotoxin monomethyl mercury, or through its reduction to elemental Hg°. The fates of both As and Hg are also strongly linked to soil or aquifer composition; indeed, As and Hg can bind to organic compounds or (oxy)hydroxides, which will influence their mobility. In turn, bacterial activities such as iron (oxy)hydroxide reduction or organic matter mineralization can indirectly influence As and Hg sequestration. The presence of sulfate/sulfide can also strongly impact these particular elements through the formation of complexes such as thio-arsenates with As or metacinnabar with Hg. Consequently, many important questions have been raised on the fate and speciation of As and Hg in the environment and how to limit their toxicity. However, due to their reactivity towards aquifer components, it is difficult to clearly dissociate the biogeochemical processes that occur and their different impacts on the fate of these TE. To do so, we developed an original, experimental, column setup that mimics an aquifer with As- or Hg-iron-oxide rich areas versus iron depleted areas, enabling a better understanding of TE biogeochemistry in anoxic conditions. The following protocol gives step by step instructions for the column set-up either for As or Hg, as well as an example with As under iron and sulfate reducing conditions.
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Affiliation(s)
| | | | - Aude Locatelli
- Environmental Biogeochemistry and Water Quality Unit, BRGM; Egg Safety & Quality Research
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32
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Locatelli A, Hiett KL, Caudill AC, Rothrock MJ. Do fecal and litter microbiomes vary within the major areas of a commercial poultry house, and does this affect sampling strategies for whole-house microbiomic studies? J APPL POULTRY RES 2017. [DOI: 10.3382/japr/pfw076] [Citation(s) in RCA: 10] [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: 11/20/2022] Open
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33
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Rothrock MJ, Davis ML, Locatelli A, Bodie A, McIntosh TG, Donaldson JR, Ricke SC. Listeria Occurrence in Poultry Flocks: Detection and Potential Implications. Front Vet Sci 2017; 4:125. [PMID: 29018807 PMCID: PMC5615842 DOI: 10.3389/fvets.2017.00125] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [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: 03/27/2017] [Accepted: 07/25/2017] [Indexed: 12/03/2022] Open
Abstract
Foodborne pathogens such as Salmonella, Campylobacter, Escherichia coli, and Listeria are a major concern within the food industry due to their pathogenic potential to cause infection. Of these, Listeria monocytogenes, possesses a high mortality rate (approximately 20%) and is considered one of the most dangerous foodborne pathogens. Although the usual reservoirs for Listeria transmission have been extensively studied, little is known about the relationship between Listeria and live poultry production. Sporadic and isolated cases of listeriosis have been attributed to poultry production and Listeria spp. have been isolated from all stages of poultry production and processing. Farm studies suggest that live birds may be an important vector and contributor to contamination of the processing environment and transmission of Listeria to consumers. Therefore, the purpose of this review is to highlight the occurrence, incidence, and potential systemic interactions of Listeria spp. with poultry.
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Affiliation(s)
- Michael J. Rothrock
- USDA-ARS, U.S. National Poultry Research Center, Egg Safety and Quality Research Unit, Athens, GA, United States
| | - Morgan L. Davis
- Center for Food Safety, Food Science Department, University of Arkansas, Fayetteville, AR, United States
| | - Aude Locatelli
- USDA-ARS, U.S. National Poultry Research Center, Egg Safety and Quality Research Unit, Athens, GA, United States
| | - Aaron Bodie
- Center for Food Safety, Food Science Department, University of Arkansas, Fayetteville, AR, United States
| | - Tori G. McIntosh
- USDA-ARS, U.S. National Poultry Research Center, Egg Safety and Quality Research Unit, Athens, GA, United States
| | - Janet R. Donaldson
- Department of Biological Sciences, University of Southern Mississippi, Hattiesburg, MS, United States
| | - Steven C. Ricke
- Center for Food Safety, Food Science Department, University of Arkansas, Fayetteville, AR, United States
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34
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Fortin-Deschênes M, Waller O, Menteş TO, Locatelli A, Mukherjee S, Genuzio F, Levesque PL, Hébert A, Martel R, Moutanabbir O. Synthesis of Antimonene on Germanium. Nano Lett 2017; 17:4970-4975. [PMID: 28678509 DOI: 10.1021/acs.nanolett.7b02111] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The lack of large-area synthesis processes on substrates compatible with industry requirements has been one of the major hurdles facing the integration of 2D materials in mainstream technologies. This is particularly the case for the recently discovered monoelemental group V 2D materials which can only be produced by exfoliation or growth on exotic substrates. Herein, to overcome this limitation, we demonstrate a scalable method to synthesize antimonene on germanium substrates using solid-source molecular beam epitaxy. This emerging 2D material has been attracting a great deal of attention due to its high environmental stability and its outstanding optical and electronic properties. In situ low energy electron microscopy allowed the real time investigation and optimization of the 2D growth. Theoretical calculations combined with atomic-scale microscopic and spectroscopic measurements demonstrated that the grown antimonene sheets are of high crystalline quality, interact weakly with germanium, exhibit semimetallic characteristics, and remain stable under ambient conditions. This achievement paves the way for the integration of antimonene in innovative nanoscale and quantum technologies compatible with the current semiconductor manufacturing.
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Affiliation(s)
- M Fortin-Deschênes
- Department of Engineering Physics, École Polytechnique de Montréal , C. P. 6079, Succ. Centre-Ville, Montréal, Québec H3C 3A7, Canada
| | - O Waller
- Department of Engineering Physics, École Polytechnique de Montréal , C. P. 6079, Succ. Centre-Ville, Montréal, Québec H3C 3A7, Canada
| | - T O Menteş
- Elettra-Sincrotrone Trieste S.C.p.A. , S.S. 14 - km 163, 5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
| | - A Locatelli
- Elettra-Sincrotrone Trieste S.C.p.A. , S.S. 14 - km 163, 5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
| | - S Mukherjee
- Department of Engineering Physics, École Polytechnique de Montréal , C. P. 6079, Succ. Centre-Ville, Montréal, Québec H3C 3A7, Canada
| | - F Genuzio
- Elettra-Sincrotrone Trieste S.C.p.A. , S.S. 14 - km 163, 5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
| | - P L Levesque
- Département de Chimie, Université de Montréal , 2900 boulevard Edouard Montpetit, Montréal, Québec H3T 1J4, Canada
| | - A Hébert
- Department of Engineering Physics, École Polytechnique de Montréal , C. P. 6079, Succ. Centre-Ville, Montréal, Québec H3C 3A7, Canada
| | - R Martel
- Département de Chimie, Université de Montréal , 2900 boulevard Edouard Montpetit, Montréal, Québec H3T 1J4, Canada
| | - O Moutanabbir
- Department of Engineering Physics, École Polytechnique de Montréal , C. P. 6079, Succ. Centre-Ville, Montréal, Québec H3C 3A7, Canada
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35
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Yu KM, Locatelli A, Altman MS. Comparing Fourier optics and contrast transfer function modeling of image formation in low energy electron microscopy. Ultramicroscopy 2017; 183:109-116. [PMID: 28366353 DOI: 10.1016/j.ultramic.2017.03.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 10/31/2016] [Revised: 03/01/2017] [Accepted: 03/22/2017] [Indexed: 10/19/2022]
Abstract
A theoretical understanding of image formation in cathode lens microscopy can facilitate image interpretation. We compare Fourier Optics (FO) and Contrast Transfer Function (CTF) approaches that were recently adapted from other realms of microscopy to model image formation in low energy electron microscopy (LEEM). Although these two approaches incorporate imaging errors from several sources similarly, they differ in the way that the image intensity is calculated. The simplification that is used in the CTF calculation advantageously leads to its computational efficiency. However, we find that lens aberrations, and spatial and temporal coherence may affect the validity of the CTF approach to model LEEM image formation under certain conditions. In particular, these effects depend strongly on the nature of the object being imaged and also become more pronounced with increasing defocus. While the use of the CTF approach appears to be justified for objects that are routinely imaged with LEEM, comparison of theory to experimental observations of a focal image series for rippled, suspended graphene reveals one example where FO works, but CTF does not. This work alerts us to potential pitfalls and guides the effective use of FO and CTF approaches. It also lays the foundation for quantitative image evaluation using these methods.
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Affiliation(s)
- K M Yu
- Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - A Locatelli
- Elettra - Sincrotrone Trieste S.C.p.a., S.S. 14 - km 163,5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
| | - M S Altman
- Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
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36
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Carletti L, Rocco D, Locatelli A, De Angelis C, Gili VF, Ravaro M, Favero I, Leo G, Finazzi M, Ghirardini L, Celebrano M, Marino G, Zayats AV. Controlling second-harmonic generation at the nanoscale with monolithic AlGaAs-on-AlOx antennas. Nanotechnology 2017; 28:114005. [PMID: 28205510 DOI: 10.1088/1361-6528/aa5645] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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
We review recent achievements in the field of nanoscale nonlinear AlGaAs photonics based on all-dielectric optical antennas. After discussing the motivation and main technological challenges for the development of an AlGaAs monolithic platform for χ (2) nonlinear nanophotonics, we present numerical and experimental investigations of the second-order nonlinear response and physical reasons for high efficiency of second-order nonlinear interactions in the AlGaAs nano-antennas. In particular, we emphasize the role of the dipolar resonances at the fundamental frequency and the multipolar resonances at the second harmonic wavelength. We also discuss second-harmonic generation directionality and show possible strategies to engineer the radiation pattern of nonlinear antennas.
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Affiliation(s)
- L Carletti
- Department of Information Engineering, University of Brescia, Via Branze 38, 25123 Brescia, Italy
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37
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Ghirardini L, Carletti L, Gili V, Pellegrini G, Duò L, Finazzi M, Rocco D, Locatelli A, De Angelis C, Favero I, Ravaro M, Leo G, Lemaître A, Celebrano M. Polarization properties of second-harmonic generation in AlGaAs optical nanoantennas. Opt Lett 2017; 42:559-562. [PMID: 28146527 DOI: 10.1364/ol.42.000559] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Manipulating light at the nanoscale by means of dielectric nanoantennas recently received renewed attention thanks to the development of key enabling fabrication tools in semiconductor technology, combined with the extremely low losses exhibited by dielectrics in the optical regime. Nanostructures based on III-V type semiconductors, characterized by an intrinsic broken symmetry down to a single elementary cell, has already demonstrated remarkable nonlinear conversion efficiencies at scales well below the operating wavelength. In this Letter, we thoroughly investigate the emission properties of second-harmonic generation (SHG) in AlGaAs monolithic nanoantennas. Our findings point toward the pivotal role of volume susceptibility in SHG, further unraveling the physics behind the nonlinear processes in these systems. The extremely high SHG efficiency attained, together with the control over the polarized emission in these nanoantennas, constitute key ingredients for the development of tunable nonlinear metasurfaces.
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38
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Rothrock M, Locatelli A, Glenn T, Thomas J, Caudill A, Kiepper B, Hiett K. Assessing the microbiomes of scalder and chiller tank waters throughout a typical commercial poultry processing day. Poult Sci 2016; 95:2372-82. [DOI: 10.3382/ps/pew234] [Citation(s) in RCA: 21] [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: 03/29/2016] [Accepted: 05/16/2016] [Indexed: 12/22/2022] Open
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39
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Gili VF, Carletti L, Locatelli A, Rocco D, Finazzi M, Ghirardini L, Favero I, Gomez C, Lemaître A, Celebrano M, De Angelis C, Leo G. Monolithic AlGaAs second-harmonic nanoantennas. Opt Express 2016; 24:15965-71. [PMID: 27410864 DOI: 10.1364/oe.24.015965] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We demonstrate monolithic aluminum gallium arsenide (AlGaAs) optical nanoantennas. Using a selective oxidation technique, we fabricated epitaxial semiconductor nanocylinders on an aluminum oxide substrate. Second harmonic generation from AlGaAs nanocylinders of 400 nm height and varying radius pumped with femtosecond pulses delivered at 1554-nm wavelength has been measured, revealing a peak conversion efficiency exceeding 10-5 for nanocylinders with an optimized geometry.
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40
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Carletti L, Locatelli A, Stepanenko O, Leo G, De Angelis C. Enhanced second-harmonic generation from magnetic resonance in AlGaAs nanoantennas. Opt Express 2015; 23:26544-50. [PMID: 26480167 DOI: 10.1364/oe.23.026544] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We designed AlGaAs-on-aluminium-oxide all-dielectric nanoantennas with magnetic dipole resonance at near-infrared wavelengths. These devices, shaped as cylinders of 400nm height and different radii, offer a few crucial advantages with respect to the silicon-on-insulator platform for operation around 1.55μm wavelength: absence of two-photon absorption, high χ((2)) nonlinearity, and the perspective of a monolithic integration with a laser. We analyzed volume χ((2)) nonlinear effects associated to a magnetic dipole resonance in these nanoantennas, and we predict second-harmonic generation exceeding 10(-3) efficiency with 1GW/cm(2) of pump intensity.
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41
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Cappadone C, Stefanelli C, Malucelli E, Zini M, Onofrillo C, Locatelli A, Rambaldi M, Sargenti A, Merolle L, Farruggia G, Graziadio A, Montanaro L, Iotti S. p53-dependent and p53-independent anticancer activity of a new indole derivative in human osteosarcoma cells. Biochem Biophys Res Commun 2015; 467:348-53. [PMID: 26433123 DOI: 10.1016/j.bbrc.2015.09.154] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [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: 09/24/2015] [Accepted: 09/28/2015] [Indexed: 11/17/2022]
Abstract
Osteosarcoma (OS) is the most common primary malignant tumor of bone, occurring most frequently in children and adolescents. The mechanism of formation and development of OS have been studied for a long time. Tumor suppressor pathway governed by p53 gene are known to be involved in the pathogenesis of osteosarcoma. Moreover, loss of wild-type p53 activity is thought to be a major predictor of failure to respond to chemotherapy in various human cancers. In previous studies, we described the activity of a new indole derivative, NSC743420, belonging to the tubulin inhibitors family, capable to induce apoptosis and arrest of the cell cycle in the G2/M phase of various cancer cell lines. However, this molecule has never been tested on OS cell line. Here we address the activity of NSC743420 by examine whether differences in the p53 status could influence its effects on cell proliferation and death of OS cells. In particular, we compared the effect of the tested molecule on p53-wild type and p53-silenced U2OS cells, and on SaOS2 cell line, which is null for p53. Our results demonstrated that NSC743420 reduces OS cell proliferation by p53-dependent and p53-independent mechanisms. In particular, the molecule induces proliferative arrest that culminate to apoptosis in SaOS2 p53-null cells, while it brings a cytostatic and differentiating effect in U2OS cells, characterized by the cell cycle arrest in G0/G1 phase and increased alkaline phosphatase activity.
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Affiliation(s)
- C Cappadone
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy.
| | - C Stefanelli
- Department for Life Quality Studies, University of Bologna, Rimini Campus, Rimini, Italy
| | - E Malucelli
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - M Zini
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - C Onofrillo
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - A Locatelli
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - M Rambaldi
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - A Sargenti
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - L Merolle
- ELETTRA-Sincrotrone Trieste S.C.p.A., Trieste, Italy
| | - G Farruggia
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy; National Institute of Biostructures and Biosystems, Roma, Italy
| | - A Graziadio
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - L Montanaro
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - S Iotti
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy; National Institute of Biostructures and Biosystems, Roma, Italy
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42
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Nevius MS, Wang F, Mathieu C, Barrett N, Sala A, Menteş TO, Locatelli A, Conrad EH. The bottom-up growth of edge specific graphene nanoribbons. Nano Lett 2014; 14:6080-6086. [PMID: 25254434 DOI: 10.1021/nl502942z] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The discovery of ballistic transport in graphene grown on SiC(0001) sidewall trenches has sparked an intense effort to uncover the origin of this exceptional conductivity. How a ribbon's edge termination, width, and topography influence its transport is not yet understood. This work presents the first structural and electronic comparison of sidewall graphene grown with different edge terminations. We show that armchair and zigzag terminated ribbons, grown from SiC, have very different topographies and interact differently with the substrate, properties that are critical to device architecture in sidewall ribbon electronics.
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Affiliation(s)
- M S Nevius
- The Georgia Institute of Technology , Atlanta, Georgia 30332-0430, United States
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Rault JE, Menteş TO, Locatelli A, Barrett N. Reversible switching of in-plane polarized ferroelectric domains in BaTiO3(001) with very low energy electrons. Sci Rep 2014; 4:6792. [PMID: 25354723 PMCID: PMC4213810 DOI: 10.1038/srep06792] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [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: 06/24/2014] [Accepted: 10/07/2014] [Indexed: 11/09/2022] Open
Abstract
The switchable bipolar ground state is at the heart of research into ferroelectrics for future, low-energy electronics. Polarization switching by an applied field is a complex phenomenon which depends on the initial domain ordering, defect concentration, electrical boundary conditions and charge screening. Injected free charge may also to be used to reversibly switch in-plane polarized domains. We show that the interaction between the initial domain order and the bulk screening provided by very low energy electrons switches the polarization without the collateral radiation damage which occurs when employing a beam of high energy electrons. Polarization switching during charge injection adds a new dimension to the multifunctionality of ferroelectric oxides.
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Affiliation(s)
- J E Rault
- Synchrotron-SOLEIL, BP 48, Saint-Aubin, F-91192 Gif sur Yvette CEDEX, France
| | - T O Menteş
- Elettra-Sincrotrone Trieste S.C.p.A.. Strada Statale 14 - km 163, 5 in AREA Science Park 34149 Basovizza, Trieste, Italy
| | - A Locatelli
- Elettra-Sincrotrone Trieste S.C.p.A.. Strada Statale 14 - km 163, 5 in AREA Science Park 34149 Basovizza, Trieste, Italy
| | - N Barrett
- CEA, DSM/IRAMIS/SPEC, F-91191 Gif-sur-Yvette Cedex, France
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Menteş TO, Zamborlini G, Sala A, Locatelli A. Cathode lens spectromicroscopy: methodology and applications. Beilstein J Nanotechnol 2014; 5:1873-86. [PMID: 25383299 PMCID: PMC4222408 DOI: 10.3762/bjnano.5.198] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 09/25/2014] [Indexed: 05/28/2023]
Abstract
The implementation of imaging techniques with low-energy electrons at synchrotron laboratories allowed for significant advancement in the field of spectromicroscopy. The spectroscopic photoemission and low energy electron microscope, SPELEEM, is a notable example. We summarize the multitechnique capabilities of the SPELEEM instrument, reporting on the instrumental aspects and the latest developments on the technical side. We briefly review applications, which are grouped into two main scientific fields. The first one covers different aspects of graphene physics. In particular, we highlight the recent work on graphene/Ir(100). Here, SPELEEM was employed to monitor the changes in the electronic structure that occur for different film morphologies and during the intercalation of Au. The Au monolayer, which creeps under graphene from the film edges, efficiently decouples the graphene from the substrate lowering the Dirac energy from 0.42 eV to 0.1 eV. The second field combines magnetism studies at the mesoscopic length scale with self-organized systems featuring ordered nanostructures. This example highlights the possibility to monitor growth processes in real time and combine chemical characterization with X-ray magnetic circular dichroism-photoemission electron microscopy (XMCD-PEEM) magnetic imaging by using the variable photon polarization and energy available at the synchrotron source.
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Affiliation(s)
- T O Menteş
- Elettra - Sincrotrone Trieste S.C.p.A., Basovizza, Trieste 34149, Italy
| | - G Zamborlini
- Department of Physics, University of Trieste, Via Valerio 2, Trieste 34137, Italy
- Peter Grünberg Institute (PGI-6) and JARA-FIT, Research Center Jülich, 52425 Jülich, Germany
| | - A Sala
- Elettra - Sincrotrone Trieste S.C.p.A., Basovizza, Trieste 34149, Italy
| | - A Locatelli
- Elettra - Sincrotrone Trieste S.C.p.A., Basovizza, Trieste 34149, Italy
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Amant F, Uzan C, Han S, Fruscio R, Steffensen KD, Škultéty J, Giuliani D, Mephon A, Rouzier R, Witteveen P, Locatelli A, Rob L, Halaska M. Matched Cohort Study on Patients with Cervical Cancer Diagnosed During Pregnancy. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu338.49] [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: 11/13/2022] Open
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Montaigne F, Lacour D, Chioar IA, Rougemaille N, Louis D, Mc Murtry S, Riahi H, Burgos BS, Menteş TO, Locatelli A, Canals B, Hehn M. Size distribution of magnetic charge domains in thermally activated but out-of-equilibrium artificial spin ice. Sci Rep 2014; 4:5702. [PMID: 25029620 PMCID: PMC4100542 DOI: 10.1038/srep05702] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [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: 03/18/2014] [Accepted: 06/26/2014] [Indexed: 11/09/2022] Open
Abstract
A crystal of emerging magnetic charges is expected in the phase diagram of the dipolar kagomé spin ice. An observation of charge crystallites in thermally demagnetized artificial spin ice arrays has been recently reported by S. Zhang and coworkers and explained through the thermodynamics of the system as it approaches a charge-ordered state. Following a similar approach, we have generated a partial order of magnetic charges in an artificial kagomé spin ice lattice made out of ferrimagnetic material having a Curie temperature of 475 K. A statistical study of the size of the charge domains reveals an unconventional sawtooth distribution. This distribution is in disagreement with the predictions of the thermodynamic model and is shown to be a signature of the kinetic process governing the remagnetization.
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Affiliation(s)
- F Montaigne
- Institut Jean Lamour, Université de Lorraine and CNRS, Vandoeuvre lès Nancy, F-54506, France
| | - D Lacour
- Institut Jean Lamour, Université de Lorraine and CNRS, Vandoeuvre lès Nancy, F-54506, France
| | - I A Chioar
- 1] CNRS, Institut NEEL, F-38042 Grenoble, France [2] Univ. Grenoble Alpes, Institut NEEL, F-38042 Grenoble, France
| | - N Rougemaille
- 1] CNRS, Institut NEEL, F-38042 Grenoble, France [2] Univ. Grenoble Alpes, Institut NEEL, F-38042 Grenoble, France
| | - D Louis
- Institut Jean Lamour, Université de Lorraine and CNRS, Vandoeuvre lès Nancy, F-54506, France
| | - S Mc Murtry
- Institut Jean Lamour, Université de Lorraine and CNRS, Vandoeuvre lès Nancy, F-54506, France
| | - H Riahi
- Institut Jean Lamour, Université de Lorraine and CNRS, Vandoeuvre lès Nancy, F-54506, France
| | - B Santos Burgos
- Elettra-Sincrotrone Trieste S.C.p.A. S.S. 14 - km 163,5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
| | - T O Menteş
- Elettra-Sincrotrone Trieste S.C.p.A. S.S. 14 - km 163,5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
| | - A Locatelli
- Elettra-Sincrotrone Trieste S.C.p.A. S.S. 14 - km 163,5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
| | - B Canals
- 1] CNRS, Institut NEEL, F-38042 Grenoble, France [2] Univ. Grenoble Alpes, Institut NEEL, F-38042 Grenoble, France
| | - M Hehn
- Institut Jean Lamour, Université de Lorraine and CNRS, Vandoeuvre lès Nancy, F-54506, France
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Moras P, Mentes TO, Sheverdyaeva PM, Locatelli A, Carbone C. Coexistence of multiple silicene phases in silicon grown on Ag(1 1 1). J Phys Condens Matter 2014; 26:185001. [PMID: 24727950 DOI: 10.1088/0953-8984/26/18/185001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Silicene, the silicon equivalent of graphene, is attracting increasing scientific and technological attention in view of the exploitation of its exotic electronic properties. This novel material has been theoretically predicted to exist as a free-standing layer in a low-buckled, stable form, and can be synthesized by the deposition of Si on appropriate crystalline substrates. By employing low-energy electron diffraction and microscopy, we have studied the growth of Si on Ag(1 1 1) and observed a rich variety of rotationally non-equivalent silicene structures. Our results highlight a very complex formation diagram, reflecting the coexistence of different and nearly degenerate silicene phases, whose relative abundance can be controlled by varying the Si coverage and growth temperature. At variance with other studies, we find that the formation of single-phase silicene monolayers cannot be achieved on Ag(1 1 1).
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Affiliation(s)
- P Moras
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Trieste, Italy
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Avagliano L, Danti L, Doi P, Felis S, Guala M, Locatelli A, Maffeo I, Mecacci F, Plevani C, Simeone S, Bulfamante G. Autophagy in placentas from acidotic newborns: An immunohistochemical study of LC3 expression. Placenta 2013; 34:1091-4. [DOI: 10.1016/j.placenta.2013.09.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 09/02/2013] [Accepted: 09/05/2013] [Indexed: 01/08/2023]
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Locatelli A, Béné MC, Zuily S, Angioi-Duprez K. [Ocular manifestations in chronic granulomatous disease]. J Fr Ophtalmol 2013; 36:789-95. [PMID: 24099698 DOI: 10.1016/j.jfo.2013.07.002] [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: 04/22/2012] [Revised: 07/02/2013] [Accepted: 07/05/2013] [Indexed: 11/15/2022]
Abstract
Chronic granulomatous disease (CGD) is a rare genetic immune deficiency due to defective oxygen metabolism in phagocytic cells. It results in recurrent severe bacterial and fungal infections in patients from an early age on. Inflammatory lesions are also observed, with the formation of granulomas. Diagnosis relies on the demonstration of a deficiency in the oxidative properties of phagocytes. Pulmonary infections are the most frequent clinical manifestations of the disease, yet all organs can be involved, such as the eye, with either infections or inflammatory chorioretinal lesions. The treatment of CGD relies on prophylaxis to avoid infections, and on the rapid management of infectious and inflammatory episodes. The only cure to date is allogenetic bone marrow transplant, which requires a compatible donor and can only be considered in certain clinical situations.
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Affiliation(s)
- A Locatelli
- Service d'ophtalmologie, CHU de Nancy-Brabois, allée du Morvan, 54511 Vandœuvre-lès-Nancy cedex, France
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Locatelli A, Spor A, Jolivet C, Piveteau P, Hartmann A. Biotic and abiotic soil properties influence survival of Listeria monocytogenes in soil. PLoS One 2013; 8:e75969. [PMID: 24116083 PMCID: PMC3792134 DOI: 10.1371/journal.pone.0075969] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 08/18/2013] [Indexed: 11/27/2022] Open
Abstract
Listeria monocytogenes is a food-borne pathogen responsible for the potentially fatal disease listeriosis and terrestrial ecosystems have been hypothesized to be its natural reservoir. Therefore, identifying the key edaphic factors that influence its survival in soil is critical. We measured the survival of L. monocytogenes in a set of 100 soil samples belonging to the French Soil Quality Monitoring Network. This soil collection is meant to be representative of the pedology and land use of the whole French territory. The population of L. monocytogenes in inoculated microcosms was enumerated by plate count after 7, 14 and 84 days of incubation. Analysis of survival profiles showed that L. monocytogenes was able to survive up to 84 days in 71% of the soils tested, in the other soils (29%) only a short-term survival (up to 7 to 14 days) was observed. Using variance partitioning techniques, we showed that about 65% of the short-term survival ratio of L. monocytogenes in soils was explained by the soil chemical properties, amongst which the basic cation saturation ratio seems to be the main driver. On the other hand, while explaining a lower amount of survival ratio variance (11%), soil texture and especially clay content was the main driver of long-term survival of L. monocytogenes in soils. In order to assess the effect of the endogenous soils microbiota on L. monocytogenes survival, sterilized versus non-sterilized soils microcosms were compared in a subset of 9 soils. We found that the endogenous soil microbiota could limit L. monocytogenes survival especially when soil pH was greater than 7, whereas in acidic soils, survival ratios in sterilized and unsterilized microcosms were not statistically different. These results point out the critical role played by both the endogenous microbiota and the soil physic-chemical properties in determining the survival of L. monocytogenes in soils.
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Affiliation(s)
| | - Aymé Spor
- INRA, UMR1347 Agroécologie, Dijon, France
| | | | - Pascal Piveteau
- INRA, UMR1347 Agroécologie, Dijon, France
- INRA, US-1106 InfoSol, BP20619, Orléans, France
- Université de Bourgogne, UMR1347 Agroécologie, Dijon, France
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