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Lemonnier LC, Couroucé A, Cessans M, Petit L, Cardwell JM, Barbazanges P, Toquet MP, Richard EA. Detection of fungi in the airways of horses according to the sample site: a methodological study. Vet Res Commun 2024; 48:345-355. [PMID: 37704768 DOI: 10.1007/s11259-023-10213-y] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 08/31/2023] [Indexed: 09/15/2023]
Abstract
Fungal detection in equine airways may be performed on either tracheal wash (TW) or bronchoalveolar lavage fluid (BALF) by either cytology or culture. However, method comparisons are sparse. Our objective was to determine the prevalence of fungi in airways of horses according to the sample site and laboratory methodology. Sixty-two adult horses, investigated in the field or referred for respiratory disease, were included. Tracheal wash, and BALF collected separately from both lungs, were collected using a videoendoscope. Fungi were detected in cytologic samples examined by light microscopy, and by fungal culture. Hay was sampled in the field. Prevalence of fungi was of 91.9% in TW and 37.1% in BALF. Fungi were cultured from 82.3% of TW and 20.9% of BALF. Fungal elements were observed cytologically in 69.4% of TW and 22.6% of BALF. In 50% of horses, the same fungi were detected in both TW and hay, but fungi detected in BALF and hay differed in all horses. Poor agreement was found for the detection of fungi between TW and BALF and between fungal culture and cytologic examination (Cohen's kappa coefficient (κ) < 0.20). Moderate agreement was found between cytologic examination of left and right lungs (κ = 0.47). The prevalence of fungi detected cytologically on pooled BALF was significantly different (p = 0.023) than on combined left and right BALF. Fungi were more prevalent in the TW than BALF, and results suggest that hay might not be the primary source of fungi of the lower respiratory tract of horses.
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Affiliation(s)
- L C Lemonnier
- CISCO-ONIRIS, Department of Equine Internal Medicine, University Veterinary Teaching Hospital, Oniris, 44300, Nantes, France.
| | - A Couroucé
- CISCO-ONIRIS, Department of Equine Internal Medicine, University Veterinary Teaching Hospital, Oniris, 44300, Nantes, France
- Université de Caen Normandie, BIOTARGEN UR7450, F-14000, Caen, France
| | - M Cessans
- CISCO-ONIRIS, Department of Equine Internal Medicine, University Veterinary Teaching Hospital, Oniris, 44300, Nantes, France
| | - L Petit
- LABÉO (Frank Duncombe), 1 route de Rosel, 14053, Caen, France
| | - J M Cardwell
- Department of Pathobiology and Population Sciences, Royal Veterinary College, Hatfield, Hertfordshire, UK
| | - P Barbazanges
- CISCO-ONIRIS, Department of Equine Internal Medicine, University Veterinary Teaching Hospital, Oniris, 44300, Nantes, France
| | - M -P Toquet
- Université de Caen Normandie, BIOTARGEN UR7450, F-14000, Caen, France
- LABÉO (Frank Duncombe), 1 route de Rosel, 14053, Caen, France
| | - E A Richard
- Université de Caen Normandie, BIOTARGEN UR7450, F-14000, Caen, France
- LABÉO (Frank Duncombe), 1 route de Rosel, 14053, Caen, France
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Tan R, Wang A, Ye C, Li J, Liu D, Darwich BP, Petit L, Fan Z, Wong T, Alvarez-Fernandez A, Furedi M, Guldin S, Breakwell CE, Klusener PAA, Kucernak AR, Jelfs KE, McKeown NB, Song Q. Thin Film Composite Membranes with Regulated Crossover and Water Migration for Long-Life Aqueous Redox Flow Batteries. Adv Sci (Weinh) 2023:e2206888. [PMID: 37178400 PMCID: PMC10369228 DOI: 10.1002/advs.202206888] [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] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 05/02/2023] [Indexed: 05/15/2023]
Abstract
Redox flow batteries (RFBs) are promising for large-scale long-duration energy storage owing to their inherent safety, decoupled power and energy, high efficiency, and longevity. Membranes constitute an important component that affects mass transport processes in RFBs, including ion transport, redox-species crossover, and the net volumetric transfer of supporting electrolytes. Hydrophilic microporous polymers, such as polymers of intrinsic microporosity (PIM), are demonstrated as next-generation ion-selective membranes in RFBs. However, the crossover of redox species and water migration through membranes are remaining challenges for battery longevity. Here, a facile strategy is reported for regulating mass transport and enhancing battery cycling stability by employing thin film composite (TFC) membranes prepared from a PIM polymer with optimized selective-layer thickness. Integration of these PIM-based TFC membranes with a variety of redox chemistries allows for the screening of suitable RFB systems that display high compatibility between membrane and redox couples, affording long-life operation with minimal capacity fade. Thickness optimization of TFC membranes further improves cycling performance and significantly restricts water transfer in selected RFB systems.
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Affiliation(s)
- Rui Tan
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Anqi Wang
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Chunchun Ye
- EaStChem School of Chemistry, University of Edinburgh, Edinburgh, EH9 3FJ, UK
| | - Jiaxi Li
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Dezhi Liu
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | | | - Luke Petit
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Zhiyu Fan
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Toby Wong
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | | | - Mate Furedi
- Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Stefan Guldin
- Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Charlotte E Breakwell
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London, W12 0BZ, UK
| | - Peter A A Klusener
- Shell Global Solutions International B.V., Energy Transition Campus Amsterdam, HW Amsterdam, Grasweg 31, 1031, The Netherlands
| | - Anthony R Kucernak
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London, W12 0BZ, UK
| | - Kim E Jelfs
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London, W12 0BZ, UK
| | - Neil B McKeown
- EaStChem School of Chemistry, University of Edinburgh, Edinburgh, EH9 3FJ, UK
| | - Qilei Song
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
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Petit L, Belgacemi R, Ancel J, Mulette P, Polette M, Deslée G, Perotin J, Dormoy V. Caractérisation des marqueurs pulmonaires de la voie Hedgehog dans la bronchopneumopathie chronique obstructive. Rev Mal Respir 2023. [DOI: 10.1016/j.rmr.2022.11.017] [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: 02/18/2023]
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Debieuvre D, Auliac J, Bylicki O, Moreau L, Corre R, Pinsolle J, Bizieux Thaminy A, Schneider S, Godbert B, Renault P, Brun P, Bernardi M, Briens E, Lepoulain Doubliez M, Delclaux B, Petit L, Bizec J, Milliet de Faverges G, Al Freijat F, Quieffin J. 132P 20 years of real life nationwide epidemiological data on lung cancer in non-academic French public hospitals: KBP-2020-CPHG compared to 2000 and 2010 studies. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.02.162] [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: 11/01/2022] Open
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Trédaniel J, Barlési F, Le Péchoux C, Lerouge D, Pichon É, Le Moulec S, Moreau L, Friard S, Westeel V, Petit L, Carré O, Guichard F, Raffy O, Villa J, Prévost A, Langlais A, Morin F, Wislez M, Giraud P, Zalcman G, Mornex F. Final results of the IFCT-0803 study, a phase II study of cetuximab, pemetrexed, cisplatin, and concurrent radiotherapy in patients with locally advanced, unresectable, stage III, non-squamous, non-small-cell lung cancer. Cancer Radiother 2022; 26:670-677. [PMID: 35260342 DOI: 10.1016/j.canrad.2021.12.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/24/2021] [Accepted: 12/12/2021] [Indexed: 12/24/2022]
Abstract
PURPOSE Roughly 20% of patients with non-small-cell lung cancer exhibit locally advanced, unresectable, stage III disease. Concurrent platinum-based chemoradiotherapy is the backbone treatment, which is followed by maintenance immunotherapy, yet with poor long-term prognosis. This phase II trial (IFCT-0803) sought to evaluate whether adding cetuximab to cisplatin and pemetrexed chemoradiotherapy would improve its efficacy in these patients. MATERIALS AND METHODS Eligible patients received weekly cetuximab (loading dose 400mg/m2 day 1; subsequent weekly 250mg/m2 doses until two weeks postradiotherapy). Chemotherapy comprised cisplatin (75mg/m2) and pemetrexed (500mg/m2), both delivered on day 1 of a 21-day cycle of maximally four. Irradiation with maximally 66Gy started on day 22. Disease control rate at week 16 was the primary endpoint. RESULTS One hundred and six patients were included (99 eligible patients). Compliance exceeded 95% for day 1 of chemotherapy cycles 1 to 4, with 76% patients receiving the 12 planned cetuximab doses. Maximal grade 3 toxicity occurred in 63% patients, and maximal grade 4 in 9.6%. The primary endpoint involving the first 95 eligible patients comprised two (2.1%) complete responses, 57 (60.0%) partial responses, and 27 (28.4%) stable diseases. This 90.5% disease control rate (95% confidence interval [95% CI]: 84.6%-96.4%) was achieved at week 16. After median 63.0-month follow-up, one-year and two-year survival rates were 75.8% and 59.5%. Median overall survival was 35.8months (95% CI: 23.5-NR), and median progression-free survival 14.4months (95% CI: 11.2-18.8), with one-year and two-year progression-free survival rates of 57.6% and 34.3%. CONCLUSION These survival rates compare favourably with published data, thus justifying further development of cetuximab-based induction chemoradiotherapy.
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Affiliation(s)
- J Trédaniel
- Department of pneumology, hôpital Saint-Joseph, 75014 Paris, France.
| | - F Barlési
- Multidisciplinary oncology and therapeutic innovations department, centre hospitalier universitaire de Marseille, 13000 Marseille, France
| | - C Le Péchoux
- Department of radiation oncology, Gustave-Roussy, 94805 Villejuif, France
| | - D Lerouge
- Department of radiation oncology, centre François-Baclesse, 14000 Caen, France
| | - É Pichon
- Department of pneumology, centre hospitalier universitaire de Tours, 37000 Tours, France
| | - S Le Moulec
- Department of pneumology, institut Bergonié, 33000 Bordeaux, France
| | - L Moreau
- Department of pneumology, hôpital Louis-Pasteur, 68024 Colmar, France
| | - S Friard
- Department of pneumology, hôpital Foch, 92150 Suresnes, France
| | - V Westeel
- Department of pneumology, centre hospitalier universitaire de Besançon, 25000 Besançon, France
| | - L Petit
- Department of pneumology, centre hospitalier Alpes Léman, 74130 Contamine-sur-Arve, France
| | - O Carré
- Department of pneumology, clinique de l'Europe, 80090 Amiens, France
| | - F Guichard
- Department of oncology, polyclinique, 33000 Bordeaux, France
| | - O Raffy
- Department of pneumology, hôpital de Chartres, 28000 Chartres, France
| | - J Villa
- Department of pneumology, centre hospitalier universitaire de Grenoble, 38000 Grenoble, France
| | - A Prévost
- Department of pneumology, centre de lutte contre le cancer Jean-Godinot, 51100 Reims, France
| | - A Langlais
- Intergroupe francophone de cancérologie thoracique, 75000 Paris, France
| | - F Morin
- Intergroupe francophone de cancérologie thoracique, 75000 Paris, France
| | - M Wislez
- Department of pneumology, hôpital Cochin, 75014 Paris, France
| | - P Giraud
- Department of radiation Oncology, hôpital européen Georges-Pompidou, 75015 Paris, France
| | - G Zalcman
- Department of pneumology, centre hospitalier universitaire de Caen, 14000 Caen, France
| | - F Mornex
- Department of radiation oncology, centre hospitalier universitaire de Lyon, 69000 Lyon, France
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Siméon H, Rouget B, Bladou F, Bernhard JC, Alezra E, Delleci C, Petit L, Vital JM, Robert G, Capon G. [Urinary drainage of spinal cord injured patients in the acute phase of trauma: A descriptive, retrospective study]. Prog Urol 2021; 32:6-13. [PMID: 34863636 DOI: 10.1016/j.purol.2021.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 08/10/2021] [Accepted: 09/10/2021] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Urinary retention in the acute phase of a spinal cord injury (SCI) requires bladder drainage (BD). International scientific societies recommend early implementation of intermittent catheterisation (IC) to prevent lower urological complications, preserve fertility, the urological future of the patient and improve its quality of life. The aim of our study was to analyze the mode of BD in the acute phase of a trauma in patients with SCI. MATERIALS AND METHODS We retrospectively analyzed the mode of BD of patients with SCI in the acute phase of trauma at the Bordeaux University Hospital from 2013 to 2018. RESULTS The care pathways of 81 patients were analyzed; patients were hospitalized in intensive care unit (ICU) (42%, n=34), in orthopaedic ward (19.8%, n=16) or in ICU and orthopaedic ward (38.2%, n=31). All of them had an indwelling catheter (IUD) inserted before IC was introduced in 56 of them (69%). On hospital discharge, IC was the BD for only 37% of patients, with differences according to the care pathway: 65% of patients leaving ICU were on IC, compared with 11% leaving orthopaedic ward. 80% of patients who had IC in ICU had an IUD installed in orthopaedic ward. CONCLUSION In this study, during the acute phase of a trauma in the majority of SCI patient, IC was introduced only in a minority of patients and the promotion was different within the hospital care pathways. Those results enhanced the need for IC awareness in different hospital units to standardize the best patient care. LEVEL OF EVIDENCE 3.
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Affiliation(s)
- H Siméon
- Service de chirurgie urologique et transplantation rénale, CHU de Bordeaux, Bordeaux, France.
| | - B Rouget
- Service de chirurgie urologique, hôpital Robert-Boulin Libourne, Libourne, France
| | - F Bladou
- Service de chirurgie urologique et transplantation rénale, CHU de Bordeaux, Bordeaux, France
| | - J-C Bernhard
- Service de chirurgie urologique et transplantation rénale, CHU de Bordeaux, Bordeaux, France
| | - E Alezra
- Service de chirurgie urologique et transplantation rénale, CHU de Bordeaux, Bordeaux, France
| | - C Delleci
- Service de médecine physique et réadaptation, CHU de Bordeaux, Bordeaux, France
| | - L Petit
- Service de réanimation chirurgicale, CHU de Bordeaux, Bordeaux, France
| | - J-M Vital
- Service de chirurgie orthopédique et de traumatologie, CHU de Bordeaux, Bordeaux, France
| | - G Robert
- Service de chirurgie urologique et transplantation rénale, CHU de Bordeaux, Bordeaux, France
| | - G Capon
- Service de chirurgie urologique et transplantation rénale, CHU de Bordeaux, Bordeaux, France
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Amidou R, Petit L, Jourdain M. Infection à la puce du canard. Ann Fr Med Urgence 2021. [DOI: 10.3166/afmu-2020-0295] [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: 11/20/2022]
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Lawrie WIL, Hendrickx NW, van Riggelen F, Russ M, Petit L, Sammak A, Scappucci G, Veldhorst M. Spin Relaxation Benchmarks and Individual Qubit Addressability for Holes in Quantum Dots. Nano Lett 2020; 20:7237-7242. [PMID: 32833455 PMCID: PMC7564448 DOI: 10.1021/acs.nanolett.0c02589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 08/24/2020] [Indexed: 06/11/2023]
Abstract
We investigate hole spin relaxation in the single- and multihole regime in a 2 × 2 germanium quantum dot array. We find spin relaxation times T1 as high as 32 and 1.2 ms for quantum dots with single- and five-hole occupations, respectively, setting benchmarks for spin relaxation times for hole quantum dots. Furthermore, we investigate qubit addressability and electric field sensitivity by measuring resonance frequency dependence of each qubit on gate voltages. We can tune the resonance frequency over a large range for both single and multihole qubits, while simultaneously finding that the resonance frequencies are only weakly dependent on neighboring gates. In particular, the five-hole qubit resonance frequency is more than 20 times as sensitive to its corresponding plunger gate. Excellent individual qubit tunability and long spin relaxation times make holes in germanium promising for addressable and high-fidelity spin qubits in dense two-dimensional quantum dot arrays for large-scale quantum information.
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Affiliation(s)
- W. I. L. Lawrie
- QuTech
and Kavli Institute of Nanoscience, Delft
University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - N. W. Hendrickx
- QuTech
and Kavli Institute of Nanoscience, Delft
University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - F. van Riggelen
- QuTech
and Kavli Institute of Nanoscience, Delft
University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - M. Russ
- QuTech
and Kavli Institute of Nanoscience, Delft
University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - L. Petit
- QuTech
and Kavli Institute of Nanoscience, Delft
University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - A. Sammak
- QuTech
and Netherlands Organization for Applied Scientific Research (TNO), Stieltjesweg 1, 2628 CK Delft, The Netherlands
| | - G. Scappucci
- QuTech
and Kavli Institute of Nanoscience, Delft
University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - M. Veldhorst
- QuTech
and Kavli Institute of Nanoscience, Delft
University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
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Abstract
Qubits based on quantum dots have excellent prospects for scalable quantum technology due to their compatibility with standard semiconductor manufacturing. While early research focused on the simpler electron system, recent demonstrations using multi-hole quantum dots illustrated the favourable properties holes can offer for fast and scalable quantum control. Here, we establish a single-hole spin qubit in germanium and demonstrate the integration of single-shot readout and quantum control. We deplete a planar germanium double quantum dot to the last hole, confirmed by radio-frequency reflectrometry charge sensing. To demonstrate the integration of single-shot readout and qubit operation, we show Rabi driving on both qubits. We find remarkable electric control over the qubit resonance frequencies, providing great qubit addressability. Finally, we analyse the spin relaxation time, which we find to exceed one millisecond, setting the benchmark for hole quantum dot qubits. The ability to coherently manipulate a single hole spin underpins the quality of strained germanium and defines an excellent starting point for the construction of quantum hardware. While most results so far in semiconductor spin-based quantum computation use electron spins, devices based on hole spins may have more favourable properties for quantum applications. Here, the authors demonstrate single-shot readout and coherent control of a qubit made from a single hole spin.
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Affiliation(s)
- N W Hendrickx
- QuTech and Kavli Institute of Nanoscience, Delft University of Technology, P. O. Box 5046, 2600 GA, Delft, The Netherlands.
| | - W I L Lawrie
- QuTech and Kavli Institute of Nanoscience, Delft University of Technology, P. O. Box 5046, 2600 GA, Delft, The Netherlands
| | - L Petit
- QuTech and Kavli Institute of Nanoscience, Delft University of Technology, P. O. Box 5046, 2600 GA, Delft, The Netherlands
| | - A Sammak
- QuTech and Netherlands Organisation for Applied Scientific Research (TNO), Stieltjesweg 1, 2628 CK, Delft, The Netherlands
| | - G Scappucci
- QuTech and Kavli Institute of Nanoscience, Delft University of Technology, P. O. Box 5046, 2600 GA, Delft, The Netherlands
| | - M Veldhorst
- QuTech and Kavli Institute of Nanoscience, Delft University of Technology, P. O. Box 5046, 2600 GA, Delft, The Netherlands.
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Nommeots-Nomm A, Houaoui A, Pradeepan Packiyanathar A, Chen X, Hokka M, Hill R, Pauthe E, Petit L, Boissière M, Massera J. Phosphate/oxyfluorophosphate glass crystallization and its impact on dissolution and cytotoxicity. Mater Sci Eng C Mater Biol Appl 2020; 117:111269. [PMID: 32919633 DOI: 10.1016/j.msec.2020.111269] [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] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 07/03/2020] [Accepted: 07/04/2020] [Indexed: 11/19/2022]
Abstract
The role of fluorine in bioactive glasses is of interest due to the potential of precipitating fluorapatite, a phase with higher chemical resistance than the typical hydroxyapatite precipitated from oxide bioactive glasses. However, the introduction of fluorine in silicate bioactive glasses was found deleterious to the bioactivity of the glass. Here, phosphate glasses with the composition 75NaPO3-(25-x) CaO-xCaF2 (in mol%), with x = 0-20 and glass-ceramics were investigated to evaluate their potential as substitutes to the traditional silicate bioactive glass. An increase in CaF2 substitution for CaO led to an increase in the glass solubility, due to an increase in highly soluble F(M)n species (where M is a cation) and to an increased polymerization of the phosphate network. Structural analysis reveals the formation of FP bonds, in addition to the F(M)n species, in the glass with the higher CaF2 content. Furthermore, with heat treatment, CaF2 crystals precipitate within the bulk in the newly developed glass, when x = 20. This bulk crystallization reduces the glass dissolution without compromising the precipitation of a reactive layer at the glass surface. Finally, in vitro cell tests were performed using MC3T3 pre-osteoblastic cells. While the substitution of CaF2 for CaO led to an increased cytotoxicity, the controlled crystallization of the fluorine containing glasses decreased such cytotoxicity to similar values than traditional bioactive phosphate glass (x0). This study reports on new oxyfluorophosphate glass and glass-ceramics able, not only, to precipitate a Ca-P reactive layer but also to be processed into glass-ceramics with controlled crystal size, density and cellular activity. STATEMENT OF SIGNIFICANCE: Uncontrolled crystallization of bioactive glasses has negative effect on the materials' bioactivity. While in silicate glass the bioactivity is solely reduced, in phosphate glasses it is often completely suppressed. Furthermore, the need for fluorine containing bioactive glasses, not only for use in bone reconstruction but also in toothpaste as emerged. The addition of F in both silicate and phosphate has led to challenges due the lack of Si-F or P-F bonds, generally leading to a decrease in bioactivity. Here, we developed a bioactive invert phosphate glass where up to 20 mol% of CaO was replaced with CaF2. In the new developed glasses, NMR demonstrated formation of P-F bonds. The content of fluorine was tailored to induce CaF2 bulk crystallization. Overall an increase in F was associated with an increase network connectivity. In turns it led to an increased dissolution rate which was linked to a higher cytotoxicity. Upon (partial to full) surface crystallization of the F-free glass, the bioactivity (ability to form a reactive layer) was loss and the cytotoxicity again increased due to the rapid dissolution of one crystal phase and of the remaining amorphous phase. On another hand, the controlled bulk precipitation of CaF2 crystals, in the F-containing glass, was associated with a reduced cytotoxicity. The new oxyfluorophosphate glass-ceramic developed is promising for application in the biomedical field.
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Affiliation(s)
- A Nommeots-Nomm
- Tampere University, Faculty of Medicine and Health Technology, Laboratory of Biomaterials and Tissue Engineering, Korkeakoulunkatu 3, 33720 Tampere, Finland
| | - A Houaoui
- Biomaterials for Health Research Group, ERRMECe, Equipe de recherche sur les Relations Matrice Extracellulaire-Cellules (EA1391), Institut des matériaux I-MAT (FD4122), CY Tech, CY Cergy Paris University, Maison Internationale de la Recherche (MIR), rue Descartes, 95001 Neuville sur Oise cedex, France
| | - A Pradeepan Packiyanathar
- Biomaterials for Health Research Group, ERRMECe, Equipe de recherche sur les Relations Matrice Extracellulaire-Cellules (EA1391), Institut des matériaux I-MAT (FD4122), CY Tech, CY Cergy Paris University, Maison Internationale de la Recherche (MIR), rue Descartes, 95001 Neuville sur Oise cedex, France
| | - X Chen
- Hunan Key Laboratory of Oral Health Research & Hunan 3D Printing Engineering Research Center of Oral Care Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, 410008, Hunan, China
| | - M Hokka
- Tampere University of Technology, Laboratory of Material Sciences, Korkeakoulunkatu 3, 33720 Tampere, Finland
| | - R Hill
- Dental Physical Sciences, Institute of Dentistry, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | - E Pauthe
- Biomaterials for Health Research Group, ERRMECe, Equipe de recherche sur les Relations Matrice Extracellulaire-Cellules (EA1391), Institut des matériaux I-MAT (FD4122), CY Tech, CY Cergy Paris University, Maison Internationale de la Recherche (MIR), rue Descartes, 95001 Neuville sur Oise cedex, France
| | - L Petit
- Tampere University of Technology, Laboratory of Photonics, Korkeakoulunkatu 3, 33720 Tampere, Finland
| | - M Boissière
- Biomaterials for Health Research Group, ERRMECe, Equipe de recherche sur les Relations Matrice Extracellulaire-Cellules (EA1391), Institut des matériaux I-MAT (FD4122), CY Tech, CY Cergy Paris University, Maison Internationale de la Recherche (MIR), rue Descartes, 95001 Neuville sur Oise cedex, France
| | - J Massera
- Tampere University, Faculty of Medicine and Health Technology, Laboratory of Biomaterials and Tissue Engineering, Korkeakoulunkatu 3, 33720 Tampere, Finland.
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Ojha N, Szczodra A, Boetti NG, Massera J, Petit L. Nucleation and growth behavior of Er 3+ doped oxyfluorophosphate glasses. RSC Adv 2020; 10:25703-25716. [PMID: 35518613 PMCID: PMC9055356 DOI: 10.1039/d0ra04681g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 05/27/2020] [Accepted: 07/01/2020] [Indexed: 11/21/2022] Open
Abstract
The nucleation and growth behavior of glasses with the composition (75 NaPO3-25 CaF2)100-x -(TiO2/ZnO/MgO) x , with x = 0 and x = 1.5 (in mol%) is investigated. The glasses possess similar activation energy for crystallization and Johnson-Mehl-Avrami exponent, with value 2 confirming bulk crystallization of crystals with needle like shape. The Ti and Mg glasses exhibit broader nucleation curve and higher T n max than the x = 0 and Zn glasses due to their stronger field strength. The crystal growth rates were determined and validated using SEM. Finally, we showed that the nucleation and growth of glasses can be controlled due to the large difference between onset of crystallization and maximum nucleation temperature which is crucial when preparing novel transparent glass-ceramics.
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Affiliation(s)
- N Ojha
- Photonics Laboratory, Tampere University Korkeakoulunkatu 3 FI-33720 Tampere Finland
| | - A Szczodra
- Photonics Laboratory, Tampere University Korkeakoulunkatu 3 FI-33720 Tampere Finland
| | - N G Boetti
- Fondazione LINKS - Leading Innovation & Knowledge for Society Via P. C. Boggio 61 10138 Torino Italy
| | - J Massera
- Faculty of Medicine and Health Technology, Tampere University Korkeakoulunkatu 3 FI-33720 Tampere Finland
| | - L Petit
- Photonics Laboratory, Tampere University Korkeakoulunkatu 3 FI-33720 Tampere Finland
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12
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Naudin J, Petit L, Mesli S, Carrié C, Cottenceau V, Biais M. Évaluation du déficit en vitamines et éléments traces sous épuration extra-rénale après mise en place d’un protocole de supplémentation en micronutriments. NUTR CLIN METAB 2020. [DOI: 10.1016/j.nupar.2020.02.380] [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: 10/24/2022]
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13
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Eenink HG, Petit L, Lawrie WIL, Clarke JS, Vandersypen LMK, Veldhorst M. Tunable Coupling and Isolation of Single Electrons in Silicon Metal-Oxide-Semiconductor Quantum Dots. Nano Lett 2019; 19:8653-8657. [PMID: 31755273 PMCID: PMC6909234 DOI: 10.1021/acs.nanolett.9b03254] [Citation(s) in RCA: 4] [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] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 11/07/2019] [Indexed: 06/10/2023]
Abstract
Extremely long coherence times, excellent single-qubit gate fidelities, and two-qubit logic have been demonstrated with silicon metal-oxide-semiconductor spin qubits, making it one of the leading platforms for quantum information processing. Despite this, a long-standing challenge in this system has been the demonstration of tunable tunnel coupling between single electrons. Here we overcome this hurdle with gate-defined quantum dots and show couplings that can be tuned on and off for quantum operations. We use charge sensing to discriminate between the (2,0) and (1,1) charge states of a double quantum dot and show excellent charge sensitivity. We demonstrate tunable coupling up to 13 GHz, obtained by fitting charge polarization lines, and tunable tunnel rates down to <1 Hz, deduced from the random telegraph signal. The demonstration of tunable coupling between single electrons in a silicon metal-oxide-semiconductor device provides significant scope for high-fidelity two-qubit logic toward quantum information processing with standard manufacturing.
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Affiliation(s)
- H. G.
J. Eenink
- QuTech
and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, The Netherlands
| | - L. Petit
- QuTech
and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, The Netherlands
| | - W. I. L. Lawrie
- QuTech
and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, The Netherlands
| | - J. S. Clarke
- Components
Research, Intel Corporation, 2501 Northeast Century Boulevard, Hillsboro, Oregon 97124, United States
| | - L. M. K. Vandersypen
- QuTech
and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, The Netherlands
| | - M. Veldhorst
- QuTech
and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, The Netherlands
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14
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Feinberg M, Fernandez S, Cassard S, Charles-Delobel C, Bertheau Y, Balois AM, Cassard S, Charles C, Diolez A, Gachet E, Gavard P, Hauser S, Lacotte K, Le Bouquin R, Martin E, Minvielle AC, Petit L, Rousselin P, Skorski G, Zhang D. Quantitation of 35S Promoter in Maize DNA Extracts from Genetically Modified Organisms Using Real-Time Polymerase Chain Reaction, Part 2: Interlaboratory Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/88.2.558] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [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]
Abstract
Abstract
The European Committee for Standardization (CEN) and the European Network of GMO Working Laboratories have proposed development of a modular strategy for stepwise validation of complex analytical techniques. When applied to the quantitation of genetically modified organisms (GMOs) in food products, the instrumental quantitation step of the technique is separately validated from the DNA extraction step to better control the sources of uncertainty and facilitate the validation of GMO-specific polymerase chain reaction (PCR) tests. This paper presents the results of an interlaboratory study on the quantitation step of the method standardized by CEN for the detection of a regulatory element commonly inserted in GMO maize-based foods. This is focused on the quantitation of P35S promoter through using the quantitative real-time PCR (QRT-PCR). Fifteen French laboratories participated in the interlaboratory study of the P35S quantitation operating procedure on DNA extract samples using either the thermal cycler ABI Prism® 7700 (Applied Biosystems, Foster City, CA) or Light Cycler® (Roche Diagnostics, Indianapolis, IN). Attention was focused on DNA extract samples used to calibrate the method and unknown extract samples. Data were processed according to the recommendations of ISO 5725 standard. Performance criteria, obtained using the robust algorithm, were compared to the classic data processing after rejection of outliers by the Cochran and Grubbs tests. Two laboratories were detected as outliers by the Grubbs test. The robust precision criteria gave values between the classical values estimated before and after rejection of the outliers. Using the robust method, the relative expanded uncertainty by the quantitation method is about 20% for a 1% Bt176 content, whereas it can reach 40% for a 0.1% Bt176. The performances of the quantitation assay are relevant to the application of the European regulation, which has an accepted tolerance interval of about ±50%. These data were fitted to a power model (r2 = 0.96). Thanks to this model, it is possible to propose an estimation of uncertainty of the QRT-PCR quantitation step and an uncertainty budget depending on the analytical conditions.
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Affiliation(s)
- Max Feinberg
- Institut National de la Recherche Agronomique (INRA), 16 Rue Claude Bernard, 75231 Paris Cedex 05, France
| | - Sophie Fernandez
- INRA Versailles, Laboratoire Méthodologies de la Détection des OGM, Unité PMDV, Route de Saint-Cyr RD10, 78026 Versailles Cedex, France
| | - Sylvanie Cassard
- Atlangene Applications, 9 Rue du Chêne Lassé, 44818 St. Herblain, France
| | | | - Yves Bertheau
- INRA Versailles, Laboratoire Méthodologies de la Détection des OGM, Unité PMDV, Route de Saint-Cyr RD10, 78026 Versailles Cedex, France
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15
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Petit L, Ilunga J, Foërster F, Traore C, Anani L, Lebwaze B, N’Kegoum B, Hurwitz N, Raphaël M, Gagnepain-Lacheteau A. Telepathology and second opinion for cancer diagnosis in sub-Saharan French-speaking countries. Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz185.099] [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
Many healthcare disparities can be described to explain cancer prevalence differences between developed and developing countries. Telepathology, telemedicine declination consisting in the transmission of digital images from a classical optical microscope combined with a digital camera linked to a computer, could offer a healthcare solution by enabling efficient communication between physicians and reinforcing multidisciplinary approaches. This study evaluated a pilot telepathology project using the ‘i-Path’ platform in Sub-Saharan French-speaking countries. This is a descriptive retrospective study. This study was made in two steps: (1) quantitative description of the platform’s use by the pathologists group and (2) qualitative evaluation of the users’ perception of the pilot project. From October 2009 to March 2018, 226 cases were submitted; 86·3% of them (n = 195) were analyzable. More than 30 experts in surgical pathology of 12 different countries were involved in the network. The average turnaround-time was less than one day. The main highlighted obstacles were the lack of time to submit cases and internet connection problems. Discussions on i-Path lead to a useful second opinion for 67·7% (n = 132) of the cases. The major part of second opinion was in favor of lymphoma (32·6%). Regarding children, lymphoma represent half of the second opinion (50·7%). The inter-observers agreement between first interpretation and second opinion was κ = 0·36, and κ = 0·58 after excluding non-diagnosed cases at submission. Even if some improvements can be made, we concluded that the project was satisfying and workable and it could be extended to other applications.
Key messages
Dialogue between expert in multiple LMIC is feasible with telepathology network and, as 1st diagnosis assessment is not always sure, telepathology help for 2nd opinion. Centers’ use of the telepathology system are different but the discussion between experts still provide a 2nd opinion in favor of a precise diagnosis.
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Affiliation(s)
- L Petit
- UFR des Sciences de la Santé Simone Veil, Université Versailles Saint-Quentin en Yvelines, Montigny-le-Bretonneux, France
- Sanofi Espoir Fondation, Paris, France
| | - J Ilunga
- Service d’Anatomie Pathologique, Cliniques Universitaires de Lubumbashi, Faculté de Médecine, Lubumbashi, Democratic Republic of the Congo
| | - F Foërster
- Hôpital Evangélique de Vanga, Vanga, Democratic Republic of the Congo
| | | | - L Anani
- UFR Hématologie Fondamentale, Faculté des Sciences de la Santé (UAC), Laboratoire d’Hématologie, CNHU-HKM, Cotonou, Benin
| | - B Lebwaze
- Département d’Anatomie Pathologique, Cliniques Universitaires de Kinshasa, Faculté de Médecine, Kinshasa, Democratic Republic of the Congo
| | | | - N Hurwitz
- Institute of Pathology, University of Basel, Basel, Switzerland
| | - M Raphaël
- UMR 8126, CNRS, Univ Paris Sud, Université Paris-Saclay, Institut Gustave Roussy, Villejuif, France
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16
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Labache L, Joliot M, Saracco J, Jobard G, Hesling I, Zago L, Mellet E, Petit L, Crivello F, Mazoyer B, Tzourio-Mazoyer N. A SENtence Supramodal Areas AtlaS (SENSAAS) based on multiple task-induced activation mapping and graph analysis of intrinsic connectivity in 144 healthy right-handers. Brain Struct Funct 2019; 224:859-882. [PMID: 30535758 PMCID: PMC6420474 DOI: 10.1007/s00429-018-1810-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 12/01/2018] [Indexed: 12/13/2022]
Abstract
We herein propose an atlas of 32 sentence-related areas based on a 3-step method combining the analysis of activation and asymmetry during multiple language tasks with hierarchical clustering of resting-state connectivity and graph analyses. 144 healthy right-handers performed fMRI runs based on language production, reading and listening, both with sentences and lists of over-learned words. Sentence minus word-list BOLD contrast and left-minus-right BOLD asymmetry for each task were computed in pairs of homotopic regions of interest (hROIs) from the AICHA atlas. Thirty-two hROIs were identified that were conjointly activated and leftward asymmetrical in each of the three language contrasts. Analysis of resting-state temporal correlations of BOLD variations between these 32 hROIs allowed the segregation of a core network, SENT_CORE including 18 hROIs. Resting-state graph analysis applied to SENT_CORE hROIs revealed that the pars triangularis of the inferior frontal gyrus and the superior temporal sulcus were hubs based on their degree centrality (DC), betweenness, and participation values corresponding to epicentres of sentence processing. Positive correlations between DC and BOLD activation values for SENT_CORE hROIs were observed across individuals and across regions regardless of the task: the more a SENT_CORE area is connected at rest the stronger it is activated during sentence processing. DC measurements in SENT_CORE may thus be a valuable index for the evaluation of inter-individual variations in language areas functional activity in relation to anatomical or clinical patterns in large populations. SENSAAS (SENtence Supramodal Areas AtlaS), comprising the 32 supramodal sentence areas, including SENT_CORE network, can be downloaded at http://www.gin.cnrs.fr/en/tools/ .
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Affiliation(s)
- L Labache
- Univ. Bordeaux, IMN, UMR 5293, 33000, Bordeaux, France
- CNRS, IMN, UMR 5293, 33000, Bordeaux, France
- CEA, GIN, IMN, UMR 5293, 33000, Bordeaux, France
- Univ. Bordeaux, IMB, UMR 5251, 33405, Talence, France
- INRIA Bordeaux Sud-Ouest, CQFD, UMR 5251, 33405, Talence, France
| | - M Joliot
- Univ. Bordeaux, IMN, UMR 5293, 33000, Bordeaux, France
- CNRS, IMN, UMR 5293, 33000, Bordeaux, France
- CEA, GIN, IMN, UMR 5293, 33000, Bordeaux, France
| | - J Saracco
- INRIA Bordeaux Sud-Ouest, CQFD, UMR 5251, 33405, Talence, France
- Bordeaux INP, IMB, UMR 5251, 33405, Talence, France
| | - G Jobard
- Univ. Bordeaux, IMN, UMR 5293, 33000, Bordeaux, France
- CNRS, IMN, UMR 5293, 33000, Bordeaux, France
- CEA, GIN, IMN, UMR 5293, 33000, Bordeaux, France
| | - I Hesling
- Univ. Bordeaux, IMN, UMR 5293, 33000, Bordeaux, France
- CNRS, IMN, UMR 5293, 33000, Bordeaux, France
- CEA, GIN, IMN, UMR 5293, 33000, Bordeaux, France
| | - L Zago
- Univ. Bordeaux, IMN, UMR 5293, 33000, Bordeaux, France
- CNRS, IMN, UMR 5293, 33000, Bordeaux, France
- CEA, GIN, IMN, UMR 5293, 33000, Bordeaux, France
| | - E Mellet
- Univ. Bordeaux, IMN, UMR 5293, 33000, Bordeaux, France
- CNRS, IMN, UMR 5293, 33000, Bordeaux, France
- CEA, GIN, IMN, UMR 5293, 33000, Bordeaux, France
| | - L Petit
- Univ. Bordeaux, IMN, UMR 5293, 33000, Bordeaux, France
- CNRS, IMN, UMR 5293, 33000, Bordeaux, France
- CEA, GIN, IMN, UMR 5293, 33000, Bordeaux, France
| | - F Crivello
- Univ. Bordeaux, IMN, UMR 5293, 33000, Bordeaux, France
- CNRS, IMN, UMR 5293, 33000, Bordeaux, France
- CEA, GIN, IMN, UMR 5293, 33000, Bordeaux, France
| | - B Mazoyer
- Univ. Bordeaux, IMN, UMR 5293, 33000, Bordeaux, France
- CNRS, IMN, UMR 5293, 33000, Bordeaux, France
- CEA, GIN, IMN, UMR 5293, 33000, Bordeaux, France
| | - Nathalie Tzourio-Mazoyer
- Univ. Bordeaux, IMN, UMR 5293, 33000, Bordeaux, France.
- CNRS, IMN, UMR 5293, 33000, Bordeaux, France.
- CEA, GIN, IMN, UMR 5293, 33000, Bordeaux, France.
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17
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Mishra A, Désévédavy F, Petit L, Smektala F, Massera J. Core-clad phosphate glass fibers for biosensing. Mater Sci Eng C Mater Biol Appl 2019; 96:458-465. [PMID: 30606555 DOI: 10.1016/j.msec.2018.11.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 11/14/2018] [Accepted: 11/24/2018] [Indexed: 11/28/2022]
Abstract
Recently, a phosphate glass with composition 20 CaO-20 SrO-10 Na2O-50 P2O5 (mol%) was found to have good potential as a biomaterial and to possess thermal properties suitable for fiber drawing. This study opened the path towards the development of fully bioresorbable fibers promising for biosensing. In the past, this phosphate glass with CeO2 was found to increase the refractive index and the glass stability. Therefore, a new SrO-containing glass was prepared with 1 mol% of CeO2 and core fibers were drawn from it. A core-clad fiber was also processed, where the core was a Ce-doped glass and the clad undoped, to allow for total internal reflection. The mechanical properties of the core and core-clad fibers are discussed as a function of immersion time in TRIS-buffer solution. Finally, a sensing region was created, in the core-clad fiber, by etching the cladding using phosphoric acid. Then, the change in light transmission, upon immersion in TRIS-buffer solution, was quantified to assess the potential use of the novel core-clad fiber as a biosensor. Upon immersion in TRIS, the core-clad fiber was found to guide light effectively and to maintain a tensile strength of ~150-200 MPa up to 6 weeks in TRIS, clearly showing that this fiber has potential as a biosensing device.
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Affiliation(s)
- A Mishra
- Faculty of Medicine and Health Technology, Tampere University, Korkeakoulunkatu 10, FI-33720 Tampere, Finland
| | - F Désévédavy
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université de Bourgogne Franche-Comté, 9 Av. A. Savary, 21078 Dijon, France
| | - L Petit
- Laboratory of Photonics, Tampere University, Korkeakoulunkatu 10, FI-33720 Tampere, Finland
| | - F Smektala
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université de Bourgogne Franche-Comté, 9 Av. A. Savary, 21078 Dijon, France
| | - J Massera
- Faculty of Medicine and Health Technology, Tampere University, Korkeakoulunkatu 10, FI-33720 Tampere, Finland.
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18
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Petit L, Boter JM, Eenink HGJ, Droulers G, Tagliaferri MLV, Li R, Franke DP, Singh KJ, Clarke JS, Schouten RN, Dobrovitski VV, Vandersypen LMK, Veldhorst M. Spin Lifetime and Charge Noise in Hot Silicon Quantum Dot Qubits. Phys Rev Lett 2018; 121:076801. [PMID: 30169086 DOI: 10.1103/physrevlett.121.076801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Indexed: 06/08/2023]
Abstract
We investigate the magnetic field and temperature dependence of the single-electron spin lifetime in silicon quantum dots and find a lifetime of 2.8 ms at a temperature of 1.1 K. We develop a model based on spin-valley mixing and find that Johnson noise and two-phonon processes limit relaxation at low and high temperature, respectively. We also investigate the effect of temperature on charge noise and find a linear dependence up to 4 K. These results contribute to the understanding of relaxation in silicon quantum dots and are promising for qubit operation at elevated temperatures.
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Affiliation(s)
- L Petit
- QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - J M Boter
- QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - H G J Eenink
- QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - G Droulers
- QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - M L V Tagliaferri
- QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - R Li
- QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - D P Franke
- QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - K J Singh
- Components Research, Intel Corporation, 2501 NE Century Blvd, Hillsboro, Oregon 97124, USA
| | - J S Clarke
- Components Research, Intel Corporation, 2501 NE Century Blvd, Hillsboro, Oregon 97124, USA
| | - R N Schouten
- QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - V V Dobrovitski
- QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - L M K Vandersypen
- QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
| | - M Veldhorst
- QuTech and Kavli Institute of Nanoscience, TU Delft, P.O. Box 5046, 2600 GA Delft, Netherlands
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19
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Laurent E, Petit L, Maakaroun-Vermesse Z, Bernard L, Odent T, Grammatico-Guillon L. National epidemiological study reveals longer paediatric bone and joint infection stays for infants and in general hospitals. Acta Paediatr 2018; 107:1270-1275. [PMID: 28477437 DOI: 10.1111/apa.13909] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 04/06/2017] [Accepted: 05/03/2017] [Indexed: 11/30/2022]
Abstract
AIM Published studies have suggested that two to five days of intravenous treatment could effectively treat paediatric bone and joint infections (PBJI), allowing a faster discharge. This study analysed the factors associated with PBJI hospital stays lasting longer than five days using the French National Hospital Discharge Database. METHODS We selected children under 15 years hospitalised in 2013 with haematogenous PBJIs using a validated French algorithm based on specific diagnosis and surgical procedure codes. Risk factors for stays of more than five days were analysed using logistic regression. RESULTS In 2013, 2717 children were hospitalised for PBJI, with 49% staying more than five days. The overall incidence of 22 per 100 000, was highest in males and toddlers. The main causes were septic arthritis (50%) and osteomyelitis (46%) and 50% of the pathogens were Staphylococci. The odd ratios for stays of five days or more were infancy, coded bacteria and sickle cell disease (7.0), having spondylodiscitis rather than septic arthritis (2.2) and being hospitalised in a general hospital rather than a teaching hospital (1.6). CONCLUSION Half of the hospital stays exceeded five days, despite scientific evidence supporting a shorter intravenous antibiotherapy regimen. Greater knowledge and widespread use of short treatment regimens are needed.
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Affiliation(s)
- E Laurent
- Epidemiology Unit; Teaching Hospital of Tours; Tours France
- Research Team EE1 EES; François Rabelais University; Tours France
| | - L Petit
- Epidemiology Unit; Teaching Hospital of Tours; Tours France
- Paediatric Unit; Teaching Hospital of Tours; Tours France
| | - Z Maakaroun-Vermesse
- Paediatric Unit; Teaching Hospital of Tours; Tours France
- Infectious Diseases Unit; Teaching Hospital of Tours; Tours France
| | - L Bernard
- Infectious Diseases Unit; Teaching Hospital of Tours; Tours France
- François Rabelais University; Tours France
| | - T Odent
- François Rabelais University; Tours France
- Paediatric Orthopaedic Unit; Teaching Hospital of Tours; Tours France
| | - L Grammatico-Guillon
- Epidemiology Unit; Teaching Hospital of Tours; Tours France
- François Rabelais University; Tours France
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20
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Auvinet J, Graça P, Belkadi L, Petit L, Bonnivard E, Dettaï A, Detrich WH, Ozouf-Costaz C, Higuet D. Mobilization of retrotransposons as a cause of chromosomal diversification and rapid speciation: the case for the Antarctic teleost genus Trematomus. BMC Genomics 2018; 19:339. [PMID: 29739320 PMCID: PMC5941688 DOI: 10.1186/s12864-018-4714-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [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: 10/31/2017] [Accepted: 04/23/2018] [Indexed: 11/29/2022] Open
Abstract
Background The importance of transposable elements (TEs) in the genomic remodeling and chromosomal rearrangements that accompany lineage diversification in vertebrates remains the subject of debate. The major impediment to understanding the roles of TEs in genome evolution is the lack of comparative and integrative analyses on complete taxonomic groups. To help overcome this problem, we have focused on the Antarctic teleost genus Trematomus (Notothenioidei: Nototheniidae), as they experienced rapid speciation accompanied by dramatic chromosomal diversity. Here we apply a multi-strategy approach to determine the role of large-scale TE mobilization in chromosomal diversification within Trematomus species. Results Despite the extensive chromosomal rearrangements observed in Trematomus species, our measurements revealed strong interspecific genome size conservation. After identifying the DIRS1, Gypsy and Copia retrotransposon superfamilies in genomes of 13 nototheniid species, we evaluated their diversity, abundance (copy numbers) and chromosomal distribution. Four families of DIRS1, nine of Gypsy, and two of Copia were highly conserved in these genomes; DIRS1 being the most represented within Trematomus genomes. Fluorescence in situ hybridization mapping showed preferential accumulation of DIRS1 in centromeric and pericentromeric regions, both in Trematomus and other nototheniid species, but not in outgroups: species of the Sub-Antarctic notothenioid families Bovichtidae and Eleginopsidae, and the non-notothenioid family Percidae. Conclusions In contrast to the outgroups, High-Antarctic notothenioid species, including the genus Trematomus, were subjected to strong environmental stresses involving repeated bouts of warming above the freezing point of seawater and cooling to sub-zero temperatures on the Antarctic continental shelf during the past 40 millions of years (My). As a consequence of these repetitive environmental changes, including thermal shocks; a breakdown of epigenetic regulation that normally represses TE activity may have led to sequential waves of TE activation within their genomes. The predominance of DIRS1 in Trematomus species, their transposition mechanism, and their strategic location in “hot spots” of insertion on chromosomes are likely to have facilitated nonhomologous recombination, thereby increasing genomic rearrangements. The resulting centric and tandem fusions and fissions would favor the rapid lineage diversification, characteristic of the nototheniid adaptive radiation. Electronic supplementary material The online version of this article (10.1186/s12864-018-4714-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- J Auvinet
- Laboratoire Evolution Paris Seine, Sorbonne Université, Univ Antilles, CNRS, Institut de Biologie Paris Seine (IBPS), F-75005, Paris, France. .,Institut de Systématique, Evolution, Biodiversité (ISYEB), Museum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, 57, rue Cuvier, 75005, Paris, France.
| | - P Graça
- Laboratoire Evolution Paris Seine, Sorbonne Université, Univ Antilles, CNRS, Institut de Biologie Paris Seine (IBPS), F-75005, Paris, France
| | - L Belkadi
- Institut Pasteur, Laboratoire Signalisation et Pathogénèse, UMR CNRS 3691, Bâtiment DARRE, 25-28 rue du Dr Roux, 75015, Paris, France
| | - L Petit
- Plateforme d'Imagerie et Cytométrie en flux, Sorbonne Université, CNRS, - Institut de Biologie Paris-Seine (BDPS - IBPS), F-75005, Paris, France
| | - E Bonnivard
- Laboratoire Evolution Paris Seine, Sorbonne Université, Univ Antilles, CNRS, Institut de Biologie Paris Seine (IBPS), F-75005, Paris, France
| | - A Dettaï
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Museum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, 57, rue Cuvier, 75005, Paris, France
| | - W H Detrich
- Department of Marine and Environmental Sciences, Marine Science Center, Northeastern University, Nahant, MA, 01908, USA
| | - C Ozouf-Costaz
- Laboratoire Evolution Paris Seine, Sorbonne Université, Univ Antilles, CNRS, Institut de Biologie Paris Seine (IBPS), F-75005, Paris, France
| | - D Higuet
- Laboratoire Evolution Paris Seine, Sorbonne Université, Univ Antilles, CNRS, Institut de Biologie Paris Seine (IBPS), F-75005, Paris, France
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21
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Petit L, Zugaj D, Bettoli V, Dreno B, Kang S, Tan J, Torres V, Layton AM, Martel P. Validation of 3D skin imaging for objective repeatable quantification of severity of atrophic acne scarring. Skin Res Technol 2018; 24:542-550. [DOI: 10.1111/srt.12464] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2018] [Indexed: 11/30/2022]
Affiliation(s)
- L. Petit
- Galderma R&D; Sophia Antipolis France
| | - D. Zugaj
- Galderma R&D; Sophia Antipolis France
| | - V. Bettoli
- Department of Dermatology; University of Ferrara; Ferrara Italy
| | - B. Dreno
- Dermatology Department; CHU Nantes; CIC 1413; CRCINA; University Nantes; Nantes France
| | - S. Kang
- Department of Dermatology; Johns Hopkins Medicine; Baltimore USA
| | - J. Tan
- Windsor Clinical Research Inc.; Western University; Windsor Ontario Canada
| | - V. Torres
- Private Practice; Mexico City Mexico
| | - A. M. Layton
- Harrogate and District NHS Foundation Trust; Harrogate UK
| | - P. Martel
- Galderma R&D; Sophia Antipolis France
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Zugaj D, Chenet A, Petit L, Vaglio J, Pascual T, Piketty C, Bourdes V. A novel image processing workflow for the in vivo quantification of skin microvasculature using dynamic optical coherence tomography. Skin Res Technol 2018; 24:396-406. [PMID: 29399881 DOI: 10.1111/srt.12442] [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] [Accepted: 01/04/2018] [Indexed: 11/29/2022]
Abstract
BACKGROUND Currently, imaging technologies that can accurately assess or provide surrogate markers of the human cutaneous microvessel network are limited. Dynamic optical coherence tomography (D-OCT) allows the detection of blood flow in vivo and visualization of the skin microvasculature. However, image processing is necessary to correct images, filter artifacts, and exclude irrelevant signals. The objective of this study was to develop a novel image processing workflow to enhance the technical capabilities of D-OCT. MATERIALS AND METHODS Single-center, vehicle-controlled study including healthy volunteers aged 18-50 years. A capsaicin solution was applied topically on the subject's forearm to induce local inflammation. Measurements of capsaicin-induced increase in dermal blood flow, within the region of interest, were performed by laser Doppler imaging (LDI) (reference method) and D-OCT. RESULTS Sixteen subjects were enrolled. A good correlation was shown between D-OCT and LDI, using the image processing workflow. Therefore, D-OCT offers an easy-to-use alternative to LDI, with good repeatability, new robust morphological features (dermal-epidermal junction localization), and quantification of the distribution of vessel size and changes in this distribution induced by capsaicin. The visualization of the vessel network was improved through bloc filtering and artifact removal. Moreover, the assessment of vessel size distribution allows a fine analysis of the vascular patterns. CONCLUSION The newly developed image processing workflow enhances the technical capabilities of D-OCT for the accurate detection and characterization of microcirculation in the skin. A direct clinical application of this image processing workflow is the quantification of the effect of topical treatment on skin vascularization.
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Affiliation(s)
- D Zugaj
- Nestlé Skin Health-Galderma R&D, Sophia Antipolis, Biot, France
| | - A Chenet
- Thales, Sophia Antipolis, Biot, France
| | - L Petit
- Nestlé Skin Health-Galderma R&D, Sophia Antipolis, Biot, France
| | - J Vaglio
- Nestlé Skin Health-Galderma R&D, Sophia Antipolis, Biot, France
| | - T Pascual
- Nestlé Skin Health-Galderma R&D, Sophia Antipolis, Biot, France
| | - C Piketty
- Nestlé Skin Health-Galderma R&D, Sophia Antipolis, Biot, France
| | - V Bourdes
- Nestlé Skin Health-Galderma R&D, Sophia Antipolis, Biot, France
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Ojha N, Tuomisto M, Lastusaari M, Petit L. Upconversion from fluorophosphate glasses prepared with NaYF4:Er3+,Yb3+ nanocrystals. RSC Adv 2018; 8:19226-19236. [PMID: 35539679 PMCID: PMC9080663 DOI: 10.1039/c8ra03298j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 04/17/2018] [Accepted: 05/17/2018] [Indexed: 12/01/2022] Open
Abstract
The direct doping method was applied to fabricate upconverter fluorophosphate glasses in the system (90NaPO3-(10-x)Na2O-xNaF) (mol%) by adding NaYF4:Er3+,Yb3+ nanocrystals. An increase in the network connectivity, a red shift of the optical band gap and a decrease in the thermal properties occur when Na2O is progressively replaced by NaF. To ensure the survival and the dispersion of the nanocrystals in the glasses with x = 0 and 10, three doping temperatures (Tdoping) (525, 550 and 575 °C) at which the nanocrystals were added in the glass melt after melting and 2 dwell times (3 and 5 minutes) before quenching the glasses were tested. Using 5 wt% of the NaYF4:Er3+,Yb3+ nanocrystals, green emission from the NaYF4:Er3+,Yb3+ nanocrystals-containing glasses was observed using a 980 nm pumping, the intensity of which depends on the glass composition and on the direct doping parameters (Tdoping and dwell time). The strongest upconversion was obtained from the glass with x = 10 prepared using a Tdoping of 550 °C and a 3 min dwell time. Finally, we showed that the upconversion, the emission at 1.5 μm and of the transmittance spectra of the nanocrystals-containing glasses could be measured to verify if decomposition of the nanocrystals occurred in glass melts during the preparation of the glasses. The direct doping method was applied to fabricate upconverter fluorophosphate glasses in the system (90NaPO3-(10-x)Na2O-xNaF) (mol%) by adding NaYF4:Er3+,Yb3+ nanocrystals.![]()
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Affiliation(s)
- N. Ojha
- Laboratory of Photonics
- Tampere University of Technology FI-33101 Tampere
- Finland
| | - M. Tuomisto
- University of Turku
- Department of Chemistry
- FI-20014 Turku
- Finland
| | - M. Lastusaari
- University of Turku
- Department of Chemistry
- FI-20014 Turku
- Finland
- Turku University Centre for Materials and Surfaces (MatSurf)
| | - L. Petit
- Laboratory of Photonics
- Tampere University of Technology FI-33101 Tampere
- Finland
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Richard MI, Fernández S, Hofmann JP, Gao L, Chahine GA, Leake SJ, Djazouli H, De Bortoli Y, Petit L, Boesecke P, Labat S, Hensen EJM, Thomas O, Schülli T. Reactor for nano-focused x-ray diffraction and imaging under catalytic in situ conditions. Rev Sci Instrum 2017; 88:093902. [PMID: 28964168 DOI: 10.1063/1.5000015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A reactor cell for in situ studies of individual catalyst nanoparticles or surfaces by nano-focused (coherent) x-ray diffraction has been developed. Catalytic reactions can be studied in flow mode in a pressure range of 10-2-103 mbar and temperatures up to 900 °C. This instrument bridges the pressure and materials gap at the same time within one experimental setup. It allows us to probe in situ the structure (e.g., shape, size, strain, faceting, composition, and defects) of individual nanoparticles using a nano-focused x-ray beam. Here, the setup was used to observe strain and facet evolution of individual model Pt catalysts during in situ experiments. It can be used for heating other (non-catalytically active) nanoparticles (e.g., nanowires) in inert or reactive gas atmospheres or vacuum as well.
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Affiliation(s)
- M-I Richard
- ID01/ESRF, 6 rue Jules Horowitz, BP220, F-38043 Grenoble Cedex, France
| | - S Fernández
- ID01/ESRF, 6 rue Jules Horowitz, BP220, F-38043 Grenoble Cedex, France
| | - J P Hofmann
- Laboratory of Inorganic Materials Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, The Netherlands
| | - L Gao
- Laboratory of Inorganic Materials Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, The Netherlands
| | - G A Chahine
- ID01/ESRF, 6 rue Jules Horowitz, BP220, F-38043 Grenoble Cedex, France
| | - S J Leake
- ID01/ESRF, 6 rue Jules Horowitz, BP220, F-38043 Grenoble Cedex, France
| | - H Djazouli
- ID01/ESRF, 6 rue Jules Horowitz, BP220, F-38043 Grenoble Cedex, France
| | - Y De Bortoli
- ID01/ESRF, 6 rue Jules Horowitz, BP220, F-38043 Grenoble Cedex, France
| | - L Petit
- ID01/ESRF, 6 rue Jules Horowitz, BP220, F-38043 Grenoble Cedex, France
| | - P Boesecke
- ID01/ESRF, 6 rue Jules Horowitz, BP220, F-38043 Grenoble Cedex, France
| | - S Labat
- Aix Marseille Université, CNRS, Université de Toulon, IM2NP UMR 7334, 13397 Marseille, France
| | - E J M Hensen
- Laboratory of Inorganic Materials Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, The Netherlands
| | - O Thomas
- Aix Marseille Université, CNRS, Université de Toulon, IM2NP UMR 7334, 13397 Marseille, France
| | - T Schülli
- ID01/ESRF, 6 rue Jules Horowitz, BP220, F-38043 Grenoble Cedex, France
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de Laroche M, Haneche F, Petit L, Cosker K, Monsel G, Caumes E. Activité en infectiologie transversale : outil de traçabilité, faisabilité et résultats sur 6 mois. Med Mal Infect 2017. [DOI: 10.1016/j.medmal.2017.03.116] [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: 11/25/2022]
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Besse B, Mazières J, Ribassin-Majed L, Barlesi F, Bennouna J, Gervais R, Moreau L, Berard H, Debieuvre D, Molinier O, Moro-Sibilot D, Souquet P, Jacquot S, Petit L, Lena H, Pignon J, Lacas B, Morin F, Milleron B, Zalcman G, Soria J. Pazopanib or placebo in completely resected stage I NSCLC patients: results of the phase II IFCT-0703 trial. Ann Oncol 2017; 28:1078-1083. [DOI: 10.1093/annonc/mdx070] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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27
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Petit L, Le Bihan-Benjamin C, Bousquet PJ. Validation de « l’algorithme cancer » pour identifier les hospitalisations liées à la prise en charge du cancer dans les bases PMSI MCO. Rev Epidemiol Sante Publique 2017. [DOI: 10.1016/j.respe.2017.01.094] [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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28
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Petit L, De Guillebon S, Girard S, Masson F, Cottenceau V, Sztark F. Étude préliminaire sur la dépense énergétique chez le patient de réanimation : comparaison de formules prédictives et de la calorimétrie indirecte à trois temps de la prise en charge. NUTR CLIN METAB 2016. [DOI: 10.1016/j.nupar.2016.09.055] [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: 11/29/2022]
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Petit L, Szotek Z, Lüders M, Svane A. Rare-earth pnictides and chalcogenides from first-principles. J Phys Condens Matter 2016; 28:223001. [PMID: 27165563 DOI: 10.1088/0953-8984/28/22/223001] [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: 06/05/2023]
Abstract
This review tries to establish what is the current understanding of the rare-earth monopnictides and monochalcogenides from first principles. The rock salt structure is assumed for all the compounds in the calculations and wherever possible the electronic structure/properties of these compounds, as obtained from different ab initio methods, are compared and their relation to the experimental evidence is discussed. The established findings are summarised in a set of conclusions and provide outlook for future study and possible design of new materials.
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Affiliation(s)
- L Petit
- Daresbury Laboratory, Daresbury, Warrington WA4 4AD, UK
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Petit L, Laurent E, Maakaroun-Vermesse Z, Odent T, Bernard L, Grammatico-Guillon L. Facteurs de risque d’hospitalisation prolongée pour infection ostéo-articulaire pédiatrique en France à partir du PMSI 2013. Rev Epidemiol Sante Publique 2016. [DOI: 10.1016/j.respe.2016.01.074] [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: 10/22/2022] Open
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31
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Bourdes V, Reynier P, Rivier M, Petit L, Tan J, Dreno B, Bissonnette R, Andres P, Martel P. Effet de l’association fixe adapalène–peroxyde de benzoyle sur les cicatrices d’acné : résultats d’une étude multicentrique, randomisée, en hémiface, simple insu, contrôlée versus véhicule. Ann Dermatol Venereol 2015. [DOI: 10.1016/j.annder.2015.10.066] [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: 10/22/2022]
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32
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Petit L, Dugaret AS, Böhling A, Seise M, Wilhelm KP, Martel P. Nouvelles méthodes pour évaluer le phénomène de flush chez des patients atteints de rosacée : modèle pharmacologique de flush et application smartphone utilisant l’image. Ann Dermatol Venereol 2015. [DOI: 10.1016/j.annder.2015.10.235] [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: 10/22/2022]
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Luiggi S, Raïa A, Petit L, Blisnick T, Perrot S, Pao L, Bastin P, Grellier P, Kohl L. A novel kinesin involved in flagellum attachment and positioning in Trypanosoma brucei. Cilia 2015. [PMCID: PMC4519002 DOI: 10.1186/2046-2530-4-s1-p44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Petit L, Paudyal D, Mudryk Y, Gschneidner KA, Pecharsky VK, Lüders M, Szotek Z, Banerjee R, Staunton JB. Complex Magnetism of Lanthanide Intermetallics and the Role of their Valence Electrons: Ab Initio Theory and Experiment. Phys Rev Lett 2015; 115:207201. [PMID: 26613466 DOI: 10.1103/physrevlett.115.207201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Indexed: 06/05/2023]
Abstract
We explain a profound complexity of magnetic interactions of some technologically relevant gadolinium intermetallics using an ab initio electronic structure theory which includes disordered local moments and strong f-electron correlations. The theory correctly finds GdZn and GdCd to be simple ferromagnets and predicts a remarkably large increase of Curie temperature with a pressure of +1.5 K kbar(-1) for GdCd confirmed by our experimental measurements of +1.6 K kbar(-1). Moreover, we find the origin of a ferromagnetic-antiferromagnetic competition in GdMg manifested by noncollinear, canted magnetic order at low temperatures. Replacing 35% of the Mg atoms with Zn removes this transition, in excellent agreement with long-standing experimental data.
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Affiliation(s)
- L Petit
- Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
| | - D Paudyal
- Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, Iowa 50011-3020, USA
| | - Y Mudryk
- Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, Iowa 50011-3020, USA
| | - K A Gschneidner
- Ames Laboratory, U.S. Department of Energy, and Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011-3020, USA
| | - V K Pecharsky
- Ames Laboratory, U.S. Department of Energy, and Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011-3020, USA
| | - M Lüders
- Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
| | - Z Szotek
- Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
| | - R Banerjee
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - J B Staunton
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
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Abstract
BACKGROUND We investigated whether cardiac output measured with pulse wave transit time (esCCO, Nihon Kohden, Tokyo, Japan) is able to track changes in cardiac output induced by an increase in preload (volume expansion/passive leg-raising) or by changes in vasomotor tone (variation in norepinephrine dosage) in critically ill patients. METHODS Eighty patients for whom the decision to give fluid (500 mL of saline over 15 min) (n=20), to perform passive leg-raising (n=20), and to increase (n=20) or to decrease (n=20) norepinephrine were included by the physician. Cardiac output was measured with pulse wave transit time (CO-esCCO) and transthoracic echocardiography (CO-TTE) before and after therapeutic intervention. RESULTS Comparison between CO-TTE and CO-esCCO showed a bias of -0.7 l min(-1) and limits of agreement of -4.4 to 2.9 l min(-1), before therapeutic intervention and a bias of -0.5 l min(-1) and limits of agreement of -4.2 to 3.2 l min(-1) after therapeutic intervention. Bias was correlated with systemic vascular resistance (r(2)=0.60, P<0.0001). Percentage error was 61% before and 59% after therapeutic intervention. Considering the overall data (n=80), the concordance rate was 84%, polar plot analysis revealed an angular bias (sd) of -11°(35°) and radial limits of agreement of (sd 50°). With regard to passive leg-raising and volume expansion groups (n=40), the concordance rate was 83%, the angular bias (sd) was -20°(36°) and radial limits of agreement ( 50°). Considering variations in norepinephrine dosage groups (n=40), the concordance rate was 86%, the angular bias (sd) was -1.8°(33°) and radial limits of agreement (40°). CONCLUSIONS esCCO was not able to track changes in cardiac output, induced by an increase in preload or by variations in vasomotor tone. Therefore, esCCO cannot guide haemodynamic interventions in critically ill patients.
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Affiliation(s)
- M Biais
- Department of Anaesthesiology and Critical Care III, Bordeaux University Hospital, F-33000 Bordeaux, France INSERM, Adaptation Cardiovasculaire à L'ischémie, U1034, F-33600 Pessac, France Univ. Bordeaux, Adaptation Cardiovasculaire à L'ischémie, U1034, F-33600 Pessac, France
| | - R Berthezène
- Department of Anaesthesiology and Critical Care I, Bordeaux University Hospital, F-33000 Bordeaux, France
| | - L Petit
- Department of Anaesthesiology and Critical Care I, Bordeaux University Hospital, F-33000 Bordeaux, France
| | - V Cottenceau
- Department of Anaesthesiology and Critical Care I, Bordeaux University Hospital, F-33000 Bordeaux, France
| | - F Sztark
- INSERM, Adaptation Cardiovasculaire à L'ischémie, U1034, F-33600 Pessac, France Univ. Bordeaux, Adaptation Cardiovasculaire à L'ischémie, U1034, F-33600 Pessac, France Department of Anaesthesiology and Critical Care I, Bordeaux University Hospital, F-33000 Bordeaux, France
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Ganet F, Le MQ, Capsal JF, Petit L, Cottinet PJ, Lermusiaux P, Millon A. Morphing Control of Steerable Wire Guide Based Electroactive Material for Cardiovascular Surgery Application. Eur J Vasc Endovasc Surg 2015. [DOI: 10.1016/j.ejvs.2015.03.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tzourio-Mazoyer N, Petit L, Zago L, Crivello F, Vinuesa N, Joliot M, Jobard G, Mellet E, Mazoyer B. Between-hand difference in ipsilateral deactivation is associated with hand lateralization: fMRI mapping of 284 volunteers balanced for handedness. Front Hum Neurosci 2015; 9:5. [PMID: 25705184 PMCID: PMC4319399 DOI: 10.3389/fnhum.2015.00005] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [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: 10/22/2014] [Accepted: 01/04/2015] [Indexed: 11/13/2022] Open
Abstract
In right-handers (RH), an increase in the pace of dominant hand movement results in increased ipsilateral deactivation of the primary motor cortex (M1). By contrast, an increase in non-dominant hand movement frequency is associated with reduced ipsilateral deactivation. This pattern suggests that inhibitory processes support right hand dominance in right-handers and raises the issues of whether this phenomenon also supports left hand preference in left-handers (LH), and/or whether it relates to asymmetry of manual ability in either group. Thanks to the BIL&GIN, a database dedicated to the investigation of hemispheric specialization (HS), we studied the variation in M1 activity during right and left finger tapping tasks (FTT) in a sample of 284 healthy participants balanced for handedness. An M1 fMRI localizer was defined for each participant as an 8 mm diameter sphere centered on the motor activation peak. RH exhibited significantly larger deactivation of the ipsilateral M1 when moving their dominant hand than their non-dominant hand. In contrast, LH exhibited comparable ipsilateral M1 deactivation during either hand movement, reflecting a bilateral cortical specialization. This pattern is likely related to left-handers’ good performances with their right hand and consequent lower asymmetry in manual ability compared with RH. Finally, inter-individual analyses over the whole sample demonstrated that the larger the difference in manual skill across hands, the larger the difference in ipsilateral deactivation. Overall, we propose that difference in ipsilateral deactivation is a marker of difference in manual ability asymmetry reflecting differences in the strength of transcallosal inhibition when a given hand is moving.
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Affiliation(s)
| | - L Petit
- GIN UMR5296, CNRS CEA Université de Bordeaux Bordeaux, France
| | - L Zago
- GIN UMR5296, CNRS CEA Université de Bordeaux Bordeaux, France
| | - F Crivello
- GIN UMR5296, CNRS CEA Université de Bordeaux Bordeaux, France
| | - N Vinuesa
- GIN UMR5296, CNRS CEA Université de Bordeaux Bordeaux, France
| | - M Joliot
- GIN UMR5296, CNRS CEA Université de Bordeaux Bordeaux, France
| | - G Jobard
- GIN UMR5296, CNRS CEA Université de Bordeaux Bordeaux, France
| | - E Mellet
- GIN UMR5296, CNRS CEA Université de Bordeaux Bordeaux, France
| | - B Mazoyer
- GIN UMR5296, CNRS CEA Université de Bordeaux Bordeaux, France
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Mellet E, Zago L, Jobard G, Crivello F, Petit L, Joliot M, Mazoyer B, Tzourio-Mazoyer N. Weak language lateralization affects both verbal and spatial skills: An fMRI study in 297 subjects. Neuropsychologia 2014; 65:56-62. [DOI: 10.1016/j.neuropsychologia.2014.10.010] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 10/08/2014] [Accepted: 10/10/2014] [Indexed: 12/29/2022]
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Rossignol A, Lacape M, Decamps S, Blottiere L, Petit L, André D, Cottenceau V, Léger A, Masson F, Cochard J, Sztark F. P100: Étude preliminaire portant sur l’adequation entre les apports caloriques calculés et administrés en post extubation chez des patients de reanimation chirurgicale. NUTR CLIN METAB 2014. [DOI: 10.1016/s0985-0562(14)70742-3] [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: 11/30/2022]
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Petit L, Svane A, Lüders M, Szotek Z, Vaitheeswaran G, Kanchana V, Temmerman WM. Phase transitions in rare earth tellurides under pressure. J Phys Condens Matter 2014; 26:274213. [PMID: 24934628 DOI: 10.1088/0953-8984/26/27/274213] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Using first-principles calculations we have studied the valence and structural transitions of the rare earth monotellurides RTe (R = Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb) under pressure. The self-interaction corrected local spin-density approximation is used to establish the ground state valence configuration as a function of volume for the RTe in both the NaCl (B1) and CsCl (B2) structures. We find that in ambient conditions all the RTe are stabilized in the B1 structure. A trivalent (R(3+)) rare earth ground state is predicted for the majority of the RTe, with the exception of SmTe, EuTe, DyTe, TmTe and YbTe, where the fully localized divalent (R(2+)) rare earth configuration is found to be energetically most favourable. Under pressure, the trivalent RTe undergo structural transitions to the B2 structure without associated valence transition. The divalent RTe on the other hand are characterized by a competition between the structural and electronic degrees of freedom, and it is the degree of f-electron delocalization that determines the sequence of phase transitions. In EuTe and YbTe, where respectively the half-filled and filled shells result in a very stable divalent configuration, we find that it is the structural B1 → B2 transition that occurs first, followed by the R(2+) → R(3+) valence transition at even higher pressures. In SmTe, DyTe and TmTe, the electronic transition occurs prior to the structural transition. With the exception of YbTe, the calculated transition pressures are found to be in good agreement with experiment.
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Affiliation(s)
- L Petit
- Daresbury Laboratory, Warrington WA4 4AD, UK
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Cugy E, Marsollet H, Minvielle C, Bordes J, Delleci C, Petit L. Traumatic brain injury: Lower cranial nerves palsy. Ann Phys Rehabil Med 2014. [DOI: 10.1016/j.rehab.2014.03.265] [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: 11/29/2022]
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Massera J, Ahmed I, Petit L, Aallos V, Hupa L. Phosphate-based glass fiber vs. bulk glass: Change in fiber optical response to probe in vitro glass reactivity. Materials Science and Engineering: C 2014; 37:251-7. [DOI: 10.1016/j.msec.2014.01.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 11/19/2013] [Accepted: 01/08/2014] [Indexed: 11/28/2022]
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Mazoyer B, Crivello F, Joliot M, Petit L, Mellet E, Jobard G, Zago L, Tzourio-Mazoyer N. Préférence manuelle et latéralisation pour le langage : étude en IRMF d’un échantillon de 297 sujets dont 153 gauchers. J Neuroradiol 2014. [DOI: 10.1016/j.neurad.2014.01.015] [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: 10/25/2022]
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Marie D, Jobard G, Crivello F, Perchey G, Petit L, Mellet E, Joliot M, Zago L, Mazoyer B, Tzourio-Mazoyer N. Descriptive anatomy of Heschl's gyri in 430 healthy volunteers, including 198 left-handers. Brain Struct Funct 2013; 220:729-43. [PMID: 24310352 PMCID: PMC4341020 DOI: 10.1007/s00429-013-0680-x] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [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: 08/09/2013] [Accepted: 11/19/2013] [Indexed: 11/29/2022]
Abstract
This study describes the gyrification patterns and surface areas of Heschl's gyrus (HG) in 430 healthy volunteers mapped with magnetic resonance imaging. Among the 232 right-handers, we found a large occurrence of duplication (64 %), especially on the right (49 vs. 37 % on the left). Partial duplication was twice more frequent on the left than complete duplication. On the opposite, in the right hemisphere, complete duplication was 10 % more frequent than partial duplication. The most frequent inter-hemispheric gyrification patterns were bilateral single HG (36 %) and left single-right duplication (27 %). The least common patterns were left duplication-right single (22 %) and bilateral duplication (15 %). Duplication was associated with decreased anterior HG surface area on the corresponding side, independently of the type of duplication, and increased total HG surface area (including the second gyrus). Inter-hemispheric gyrification patterns strongly influenced both anterior and total HG surface area asymmetries, leftward asymmetry of the anterior HG surface was observed in all patterns except double left HG, and total HG surface asymmetry favored the side of duplication. Compared to right-handers, the 198 left-handers exhibited lower occurrence of duplication, and larger right anterior HG surface and total HG surface areas. Left-handers' HG surface asymmetries were thus significantly different from those of right-handers, with a loss of leftward asymmetry of their anterior HG surface, and with significant rightward asymmetry of their total HG surface. In summary, gyrification patterns have a strong impact on HG surface and asymmetry. The observed reduced lateralization of HG duplications and anterior HG asymmetry in left-handers highlights HG inter-hemispheric gyrification patterns as a potential candidate marker of speech lateralization.
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Affiliation(s)
- D Marie
- GIN, UMR 5296, University Bordeaux, 33000, Bordeaux, France
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Preiser JC, Petit L, Sztark F, Timsit JF, Vincent JL, Zazzo JF, van Zanten A. O31 Étude randomisée contrôlée multicentrique d’une nutrition entérale immuno-modulatrice chez le patient de réanimation ventilé. NUTR CLIN METAB 2013. [DOI: 10.1016/s0985-0562(13)70303-0] [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: 10/25/2022]
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Tan J, Blume-Peytavi U, Ortonne J, Wilhelm K, Marticou L, Baltas E, Rivier M, Petit L, Martel P. An observational cross-sectional survey of rosacea: clinical associations and progression between subtypes. Br J Dermatol 2013; 169:555-62. [DOI: 10.1111/bjd.12385] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2013] [Indexed: 12/01/2022]
Affiliation(s)
| | - U. Blume-Peytavi
- Department of Dermatology and Allergy; Charité-Universitätsmedizin; Charitéplatz 1; 10117; Berlin; Germany
| | - J.P. Ortonne
- Service de Dermatologie; Hôpital L'Archet; 2, BP 3079; Nice 06202; Cedex 3; France
| | | | - L. Marticou
- Luc Marticou Consulting; 19 Rue de Lahire; Orleans; 0033; Loiret; France
| | - E. Baltas
- Department of Dermatology and Allergology; University of Szeged; Szeged; H-6720 Szeged, Korányi fasor 6.; Hungary
| | - M. Rivier
- Galderma R&D; Les Templiers - 2400; route des Colles; Sophia Antipolis; 06410; Biot; France
| | - L. Petit
- Galderma R&D; Les Templiers - 2400; route des Colles; Sophia Antipolis; 06410; Biot; France
| | - P. Martel
- Galderma R&D; Les Templiers - 2400; route des Colles; Sophia Antipolis; 06410; Biot; France
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Mellet E, Jobard G, Zago L, Crivello F, Petit L, Joliot M, Mazoyer B, Tzourio-Mazoyer N. Relationships between hand laterality and verbal and spatial skills in 436 healthy adults balanced for handedness. Laterality 2013; 19:383-404. [DOI: 10.1080/1357650x.2013.796965] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Massera J, Petit L, Cardinal T, Videau JJ, Hupa M, Hupa L. Thermal properties and surface reactivity in simulated body fluid of new strontium ion-containing phosphate glasses. J Mater Sci Mater Med 2013; 24:1407-1416. [PMID: 23512152 DOI: 10.1007/s10856-013-4910-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Accepted: 03/08/2013] [Indexed: 06/01/2023]
Abstract
In this paper, we investigate the effect of SrO substitution for CaO in 50P₂O₅-10Na₂-(40-x)CaO-xSrO glass system (x from 0 to 40) on the thermal and structural properties and also on the glass reactivity in simulated body fluid (SBF) in order to find new glass candidates for biomedical glass fibers. The addition of SrO at the expense of CaO seems to restrain the leaching of phosphate ions in the solution limiting the reduction of the solution pH. We observed the formation of an apatite layer at the surface of the glasses when in contact with SBF. SrO and MgO were found in the apatite layer of the strontium ion-containing glasses, the concentration of which increases with an increase of SrO content. We think that it is the presence of MgO and SrO in the layer which limits the leaching of phosphate in the solution and thus the glass dissolution in SBF.
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Affiliation(s)
- J Massera
- Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, 20500 Turku, Finland.
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Slimano F, Catoire C, Mestier LD, Thierry A, Volet J, Petit L, Burde F, Bouche O. OHP-006 Adverse Effects of Day-Hospital Cancer Treatment Monitored at Home: Creation of a Physicianñpatient Logbook. Eur J Hosp Pharm 2013. [DOI: 10.1136/ejhpharm-2013-000276.380] [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: 11/04/2022] Open
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Larbi B, Dridi W, Le Bescop P, Dangla P, Petit L. Link between microstructure and tritiated water diffusivity in mortars. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135601006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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