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El Jundi A, Mayor M, Folgado E, Gomri C, Benkhaled BT, Chaix A, Verdie P, Nottelet B, Semsarilar M. Peptide-guided self-assembly of polyethylene glycol-b-poly(ε-caprolactone-g-peptide) block copolymers. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111386] [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]
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Folgado E, Mayor M, Cot D, Ramonda M, Godiard F, Ladmiral V, Semsarilar M. Correction: Preparation of well-defined 2D-lenticular aggregates by self-assembly of PNIPAM- b-PVDF amphiphilic diblock copolymers in solution. Polym Chem 2021. [DOI: 10.1039/d1py90062e] [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: 11/21/2022]
Abstract
Correction for ‘Preparation of well-defined 2D-lenticular aggregates by self-assembly of PNIPAM-b-PVDF amphiphilic diblock copolymers in solution’ by Enrique Folgado et al., Polym. Chem., 2021, 12, 1465–1475, DOI: 10.1039/D0PY01193B.
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Affiliation(s)
- Enrique Folgado
- Institut Charles Gerhardt de Montpellier
- ICGM
- Univ Montpellier
- CNRS
- ENSCM
| | - Matthias Mayor
- Institut Européen des Membranes
- IEM
- Univ Montpellier
- CNRS
- ENSCM
| | - Didier Cot
- Institut Européen des Membranes
- IEM
- Univ Montpellier
- CNRS
- ENSCM
| | - Michel Ramonda
- Centre de technologie de Montpellier
- CTM
- Université de Montpellier
- France
| | - Franck Godiard
- Service de Microscopie Electronique
- Université Montpellier
- 34095 Montpellier Cedex 5
- France
| | - Vincent Ladmiral
- Institut Charles Gerhardt de Montpellier
- ICGM
- Univ Montpellier
- CNRS
- ENSCM
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Folgado E, Mayor M, Cot D, Ramonda M, Godiard F, Ladmiral V, Semsarilar M. Preparation of well-defined 2D-lenticular aggregates by self-assembly of PNIPAM- b-PVDF amphiphilic diblock copolymers in solution. Polym Chem 2021. [DOI: 10.1039/d0py01193b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PNIPAM-b-PVDF amphiphilic block copolymers were synthesized via RAFT polymerization in dimethyl carbonate. These block copolymers were able to self-assemble into various morphologies such as spherical, crumpled, lamellar and lenticular 2D aggregates.
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Affiliation(s)
- Enrique Folgado
- Institut Charles Gerhardt de Montpellier
- ICGM
- Univ Montpellier
- CNRS
- ENSCM
| | - Matthias Mayor
- Institut Européen des Membranes
- IEM
- Univ Montpellier
- CNRS
- ENSCM
| | - Didier Cot
- Institut Européen des Membranes
- IEM
- Univ Montpellier
- CNRS
- ENSCM
| | - Michel Ramonda
- Centre de technologie de Montpellier
- CTM
- Université de Montpellier
- France
| | - Franck Godiard
- Service de Microscopie Electronique
- Université Montpellier
- 34095 Montpellier Cedex 5
- France
| | | | - Mona Semsarilar
- Institut Charles Gerhardt de Montpellier
- ICGM
- Univ Montpellier
- CNRS
- ENSCM
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Folgado E, Mayor M, Ladmiral V, Semsarilar M. Evaluation of Self-Assembly Pathways to Control Crystallization-Driven Self-Assembly of a Semicrystalline P(VDF- co-HFP)- b-PEG- b-P(VDF- co-HFP) Triblock Copolymer. Molecules 2020; 25:E4033. [PMID: 32899379 PMCID: PMC7504740 DOI: 10.3390/molecules25174033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 08/05/2020] [Revised: 08/25/2020] [Accepted: 09/02/2020] [Indexed: 11/30/2022] Open
Abstract
To date, amphiphilic block copolymers (BCPs) containing poly(vinylidene fluoride-co-hexafluoropropene) (P(VDF-co-HFP)) copolymers are rare. At moderate content of HFP, this fluorocopolymer remains semicrystalline and is able to crystallize. Amphiphilic BCPs, containing a P(VDF-co-HFP) segment could, thus be appealing for the preparation of self-assembled block copolymer morphologies through crystallization-driven self-assembly (CDSA) in selective solvents. Here the synthesis, characterization by 1H and 19F NMR spectroscopies, GPC, TGA, DSC, and XRD; and the self-assembly behavior of a P(VDF-co-HFP)-b-PEG-b-P(VDF-co-HFP) triblock copolymer were studied. The well-defined ABA amphiphilic fluorinated triblock copolymer was self-assembled into nano-objects by varying a series of key parameters such as the solvent and the non -solvent, the self-assembly protocols, and the temperature. A large range of morphologies such as spherical, square, rectangular, fiber-like, and platelet structures with sizes ranging from a few nanometers to micrometers was obtained depending on the self-assembly protocols and solvents systems used. The temperature-induced crystallization-driven self-assembly (TI-CDSA) protocol allowed some control over the shape and size of some of the morphologies.
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Affiliation(s)
- Enrique Folgado
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France;
- IEM, Univ Montpellier, CNRS, ENSCM, Montpellier, France;
| | - Matthias Mayor
- IEM, Univ Montpellier, CNRS, ENSCM, Montpellier, France;
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Palma Sanchez D, Haro A, Moreno MJ, Peñas E, Mayor M, Moreno M, Linares Ferrando LF. AB1290-HPR UTILITY OF FRAX IN THE RISK DETECTION OF FRACTURE IN SPONDYLOARTHRITIS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.3839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Axial spondyloarthritis (SpAax) presents an increased risk of vertebral fracture not fully detected by Dual energy X-ray absorptiometry (DXA). The FRAX algorithms give the 10-year probability of hip fracture and of mayor osteoporotic fracture (clinical spine, forearm, hip or shoulder fracture), taking into account 11 clinical risk factors.Objectives:To analyze the suitability of FRAX to detect the risk of fracture in patients with SpAax. To assess whether the incorporation of SpAax as a clinical risk factor to conventional FRAX provides additional information.Methods:Cross-sectional study in which SpAax patients (ASAS criteria) were included. Clinical-demographic and related to the disease variables were collected. FRIDEX model for Spanish population was used to determine low, intermediate or high risk of mayor fracture by FRAX. These results were compared with those obtained by DXA and trabecular bone score (TBS). In the statistical analysis we used mean and standard deviation (SD) in quantitative variables and frequency in qualitative ones. To compare means among 3 groups, ANOVA test was used.Results:The characteristics of the patients are shown in Table 1. According to FRIDEX, no patient had high risk of fracture and 2.4% had intermediate risk. When SpAax was added as a risk factor, no patient had high risk of fracture and 6.1% presented intermediate risk. According to DXA, 7.3% had high risk of fracture and 41.3% intermediate risk. TBS detected high risk of fracture in 18.3% and intermediate risk also in 18.3% of patients.Table 1.Sociodemographic, clinical and related characteristics with the disease (BMD: bone mineral density, BMI: index of body mass)Gender (Male), n (%)61 (74.4)Age, mean ± SD49.48 ± 12.47BMI, mean ± SD27.13 ± 4.42Smoking, n (%)26 (31.7)Diabetes mellitus, n (%)9 (11)Osteoporotic fracture, n (%)1 (1.2)Disease duration (years), mean ± SD11.77 ± 10syndesmophytes, n (%)38 (46.3)ASDAS-PCR, mean ± SD2.55 ± 1.07Lumbar BMD (g / cm2), mean ± SD1.032 ± 0.180BMD femoral neck (g / cm2), mean ± SD0.816 ± 0.140Lumbar TBS, mean ± SD1.383 ± 0.133Conclusion:FRAX does not seem an adequate tool to detect the risk of fracture in patients with SpAax since it did not improve the results obtained by DXA meanwhile TBS did. The incorporation of SpAax as a clinical risk factor to conventional FRAX did not provide additional information in most casesDisclosure of Interests:None declared
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Debiossac M, Schätti J, Kriegleder M, Geyer P, Shayeghi A, Mayor M, Arndt M, Köhler V. Tailored photocleavable peptides: fragmentation and neutralization pathways in high vacuum. Phys Chem Chem Phys 2018; 20:11412-11417. [PMID: 29645042 PMCID: PMC5932999 DOI: 10.1039/c8cp01058g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 03/23/2018] [Indexed: 01/31/2023]
Abstract
Photocleavable tags (PCTs) have the potential for excellent spatio-temporal control over the release of subunits of complex molecules. Here, we show that electrosprayed oligopeptides, functionalized by a tailored ortho-nitroarylether can undergo site-specific photo-activated cleavage under UV irradiation (266 nm) in high vacuum. The comparison of UV photodissociation (UVPD) and collision-induced dissociation (CID) points to the thermal nature of the cleavage mechanism, a picture corroborated by the temperature dependence of the process. Two competing photodissociation pathways can be identified. In one case a phenolate anion is separated from a neutral zwitterion. In the other case a neutral phenol derivative leaves a negatively charged peptide behind. To understand the factors favoring one channel over the other, we investigate the influence of the peptide length, the nature of the phenolic group and the position of the nitro-group (ortho vs. para). The observed gas phase cleavage of a para-nitro benzylic ether markedly differs from the established behavior in solution.
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Affiliation(s)
- M. Debiossac
- Faculty of Physics, University of Vienna , VCQ, Boltzmanngasse 5 , A-1090 Vienna , Austria .
| | - J. Schätti
- Department of Chemistry, University of Basel , Mattenstrasse 24a, BPR 1096 , CH-4058 Basel , Switzerland .
| | - M. Kriegleder
- Faculty of Physics, University of Vienna , VCQ, Boltzmanngasse 5 , A-1090 Vienna , Austria .
| | - P. Geyer
- Faculty of Physics, University of Vienna , VCQ, Boltzmanngasse 5 , A-1090 Vienna , Austria .
| | - A. Shayeghi
- Faculty of Physics, University of Vienna , VCQ, Boltzmanngasse 5 , A-1090 Vienna , Austria .
| | - M. Mayor
- Department of Chemistry, University of Basel , Mattenstrasse 24a, BPR 1096 , CH-4058 Basel , Switzerland .
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz 1 , D-76344 Eggenstein-Leopoldshafen , Germany
- Lehn Institute of Functional Materials (LIFM), Sun Yat-Sen University (SYSU) , Xingang Rd. W. , Guangzhou , China
| | - M. Arndt
- Faculty of Physics, University of Vienna , VCQ, Boltzmanngasse 5 , A-1090 Vienna , Austria .
| | - V. Köhler
- Department of Chemistry, University of Basel , Mattenstrasse 24a, BPR 1096 , CH-4058 Basel , Switzerland .
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Schätti J, Sezer U, Pedalino S, Cotter JP, Arndt M, Mayor M, Köhler V. Tailoring the volatility and stability of oligopeptides. J Mass Spectrom 2017; 52:550-556. [PMID: 28608445 PMCID: PMC5601229 DOI: 10.1002/jms.3959] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 06/08/2017] [Accepted: 06/08/2017] [Indexed: 06/07/2023]
Abstract
Amino acids are essential building blocks of life, and fluorinated derivatives have gained interest in chemistry and medicine. Modern mass spectrometry has enabled the study of oligo- and polypeptides as isolated entities in the gas phase, but predominantly as singly or even multiply charged species. While laser desorption of neutral peptides into adiabatically expanding supersonic noble gas jets is possible, UV-VIS spectroscopy, electric or magnetic deflectometry as well as quantum interferometry would profit from the possibility to prepare thermally slow molecular beams. This has typically been precluded by the fragility of the peptide bond and the fact that a peptide would rather 'fry', i.e. denature and fragment than 'fly'. Here, we explore how tailored perfluoroalkyl functionalization can reduce the intermolecular binding and thus increase the volatility of peptides and compare it to previously explored methylation, acylation and amidation of peptides. We show that this strategy is essential and enables the formation of thermal beams of intact neutral tripeptides, whereas only fragments were observed for an extensively fluoroalkyl-decorated nonapeptide. © 2017 The Authors. Journal of Mass Spectrometry Published by John Wiley & Sons Ltd.
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Affiliation(s)
- J. Schätti
- University of BaselDepartment of ChemistryBasel4056Switzerland
| | - U. Sezer
- University of ViennaFaculty of PhysicsBoltzmanngasse 51090ViennaAustria
| | - S. Pedalino
- University of ViennaFaculty of PhysicsBoltzmanngasse 51090ViennaAustria
| | - J. P. Cotter
- University of ViennaFaculty of PhysicsBoltzmanngasse 51090ViennaAustria
| | - M. Arndt
- University of ViennaFaculty of PhysicsBoltzmanngasse 51090ViennaAustria
| | - M. Mayor
- University of BaselDepartment of ChemistryBasel4056Switzerland
- Karlsruhe Institute of TechnologyInstitute for NanotechnologyHermann‐von‐Helmholtz‐Platz 176344Eggenstein‐LeopoldshafenGermany
| | - V. Köhler
- University of BaselDepartment of ChemistryBasel4056Switzerland
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Karimi MA, Bahoosh SG, Valášek M, Bürkle M, Mayor M, Pauly F, Scheer E. Identification of the current path for a conductive molecular wire on a tripodal platform. Nanoscale 2016; 8:10582-10590. [PMID: 27163116 DOI: 10.1039/c5nr08708b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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
We present the chemical synthesis as well as charge transport measurements and calculations for a new tripodal platform based on a rigid 9,9'-spirobifluorene equipped with a phenylene-ethynylene wire. The transport experiments are performed with the help of the low-temperature mechanically controlled break junction technique with gold electrodes. By combining experimental and theoretical investigations of elastic and inelastic charge transport, we show that the current proceeds through the designated molecular wire and identify a binding geometry that is compatible with the experimental observations. The conductive molecular wire on the platform features a well-defined and relatively high conductance of the order of 10(-3)G0 despite the length of the current path of more than 1.7 nm, demonstrating that this platform is suitable to incorporate functional units like molecular switches or sensors.
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Affiliation(s)
- M A Karimi
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany.
| | - S G Bahoosh
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany.
| | - M Valášek
- Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, 76021 Karlsruhe, Germany
| | - M Bürkle
- Nanosystem Research Institute (NRI) 'RICS', National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
| | - M Mayor
- Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, P.O. Box 3640, 76021 Karlsruhe, Germany and Department of Chemistry, University of Basel, 4056 Basel, Switzerland and Lehn Institute of Functional Materials (LIFM), Sun Yat-Sen University (SYSU), Xingang Rd. W., Guangzhou, China
| | - F Pauly
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany.
| | - E Scheer
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany.
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Marques IB, Silva RDM, Moraes CE, Azevedo LS, Nahas WC, David-Neto E, Furmanczyk-Zawiska A, Baczkowska T, Chmura A, Szmidt J, Durlik M, Joslin J, Blaker P, White B, Marinaki A, Sanderson J, Goldsmith DJ, Medani S, Traynor C, Mohan P, Little D, Conlon P, Molina M, Gonzalez E, Gutierrez E, Sevillano A, Polanco N, Morales E, Hernandez A, Praga M, Morales JM, Andres A, Park SJ, Kim TH, Kim YW, Kim YH, Kang SW, Kujawa-Szewieczek A, Szotowska M, Kuczera P, Chudek J, Wiecek A, Kolonko A, Mahrova A, Svagrova K, Bunc V, Stollova M, Teplan V, Hundt F, van Heteren P, Woitas R, Cavallo MC, Sepe V, Conte F, Albrizio P, Bottazzi A, Geraci PM, Alpay N, Gumber MR, Kute VB, Vanikar AV, Patel HV, Shah PR, Engineer DP, Trivedi HL, Golebiewska JE, Debska-Slizien A, Rutkowski B, Matias P, Martins AR, Raposo L, Jorge C, Weigert A, Birne R, Bruges M, Adragao T, Almeida M, Mendes M, Machado D, Masin-Spasovska J, Dohcev S, Stankov O, Stavridis S, Saidi S, Dejanova B, Rambabova-Busletic I, Dejanov P, Spasovski G, Nho KW, Kim YH, Han DJ, Park SK, Kim SB, Fenoglio R, Lazzarich EE, Cagna D, Cena T, Conti N, Quaglia M, Radin E, Izzo C, Stratta P, Oh IH, Park JS, Lee CH, Kang CM, Kim GH, Leone F, Lofaro D, Gigliotti P, Lupinacci S, Toteda P, Vizza D, Perri A, Papalia T, Bonofiglio R, di Loreto P, de Silvestro L, Montanaro D, Martino F, Sandrini S, Minetti E, Cabiddu G, Yildirim T, Yilmaz R, Turkmen E, Abudalal A, Altindal M, Ertoy-Baydar D, Erdem Y, Panuccio V, Tripepi R, Parlongo G, Versace MC, Politi R, Zoccali C, Mallamaci F, Porrini E, Silva I, Diaz J, Ibernon M, Moreso F, Benitez R, Delgado Mallen P, Osorio J, Lauzurica R, Torres A, Ersoy A, Koca N, Gullu Koca T, Kirhan E, Sarandol E, Ersoy C, Dirican M, Milne J, Suter V, Mikhail A, Akalin H, Dizdar O, Ersoy A, Pascual J, Torio A, Garcia C, Hernandez J, Perez-Saez MJ, Mir M, Anna F, Crespo M, Carta P, Zanazzi M, Antognoli G, Di Maria L, Caroti L, Minetti E, Dizdar O, Ersoy A, Akalin H, Ray DS, Mukherjee K, Bohidar NP, Pattanaik A, Das P, Thukral S, Kimura T, Yagisawa T, Ishikawa N, Sakuma Y, Fujiwara T, Nukui A, Gavela EE, Sancho AA, Kanter JJ, Avila AA, Beltran SS, Pallardo LL, Dawoud FG, Aithal V, Mikhail A, Majernikova M, Rosenberger J, Prihodova L, Nagyova I, Jarcuskova M, Roland R, Groothoff JW, van Dijk JP, van Agteren M, de Weerd A, van de Wetering J, IJzermans J, Betjes M, Weimar W, Popoola J, Reed A, Tavarro R, Chryssanthopoulou C, MacPhee I, Mayor M, Franco S, Jara P, Ayala R, Orue MG, Martinez A, Martinez M, Wasmouth N, Arik G, Yasar A, Turkmen E, Yildirim T, Altindal M, Abudalal A, Yilmaz S, Arici M, Bihari Bansal S, Pokhariyal S, Jain S, Sethi S, Ahlawat R, Kher V, Martins LS, Aguiar P, Dias L, Fonseca I, Henriques AC, Cabrita A, Davide J, Sparkes TM, Trofe-Clark J, Reese PP, Jakobowski D, Goral S, Doll SL, Abt PL, Sawinski D, MBloom RD, Knap B, Lukac J, Lukin M, Majcen I, Pavlovec F, Kandus A, Bren AF, Kong JM, Jeong JH, Ahn J, Lee DR, Son SH, Kim BC, Choi WY, Whang EJ, Czajka B, Malgorzewicz S, Debska-Slizien A, Rutkowski B, Panizo N, Rengel MA, Vega A, Abad S, Tana L, Arroyo D, Rodriguez-Ferrero M, Perez de Jose A, Lopez-Gomez JM, Koutroutsos K, Sackey J, Paolini L, Ramkhelawon R, Tavarro R, Chowrimootoo M, Whelan D, Popoola J, Szotowska M, Kuczera P, Chudek J, Wiecek A, Kolonko A, Slatinska J, Honsova E, Wohlfahrtova M, Slimackova E, Rajnochova SB, Viklicky O, Yankovoy A, Smith ISJ, Wylie E, Ruiz-Esteban P, Lopez V, Garcia-Frias P, Cabello M, Gonzalez-Molina M, Vozmediano C, Hernandez D, Pavlovic J, Radivojevic D, Lezaic V, Simic-Ogrizovic S, Lausevic M, Naumovic R, Ersoy A, Koca N, Kirhan E, Gullu Koca T, Ersoy C, Sarandol E, Dirican M, Sakhuja V, Gundlapalli S, Rathi M, Jha V, Kohli HS, Sharma A, Minz M, Nimgirova A, Esayan A, Kayukov I, Zuyeva E, Bilen Y, Cankaya E, Keles M, Gulcan E, Turkeli M, Albayrak B, Uyanik A, Yildirim R, Molitor N, Praktiknjo M, Woitas R, Abeygunaratne TN, Balasubramanian S, Baker R, Nicholson T, Toprak O, Sari Y, Keceli S, Kurt H, Rocha A, Malheiro J, Martins LS, Fonseca I, Dias L, Pedroso S, Almeida M, Henriques A, Nihei C, Bacelar Marques I, Seguro CA, David-Neto E, Mate G, Martin N, Colon L, Casellas L, Garangou D, de la Torre M, Torguet P, Garcia I, Calabia J, Valles M, Pruthi R, Calestani M, Leydon G, Ravanan R, Roderick P, Korkmaz S, Ersoy A, Gulten S, Koca N. Transplantation - clinical studies II. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft155] [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: 11/14/2022] Open
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Bonfils X, Bouchy F, Delfosse X, Forveille T, Gillon M, Lovis C, Mayor M, Neves V, Pepe F, Perrier C, Queloz D, Santos N, Ségransan D, Udry S. Prized results from HARPS. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134705004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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De La Torre-Prados M, Garcia-De la Torre A, Enguix A, Mayor M, Zamboschi N, Trujillano-Fernández C, Garcia-Alcantara A. Pro-adrenomedullin as prognostic biomarker in the sepsis. Crit Care 2013. [PMCID: PMC3642695 DOI: 10.1186/cc11971] [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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Santos N, Mayor M, Bonfils X, Dumusque X, Bouchy F, Figueira P, Lovis C, Melo C, Pepe F, Queloz D, Ségransan D, Sousa S, Udry S. Global results from the HARPS metal-poor sample. EPJ Web of Conferences 2011. [DOI: 10.1051/epjconf/20101102007] [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: 11/15/2022] Open
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13
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Crivillers N, Liscio A, Di Stasio F, Van Dyck C, Osella S, Cornil D, Mian S, Lazzerini GM, Fenwick O, Orgiu E, Reinders F, Braun S, Fahlman M, Mayor M, Cornil J, Palermo V, Cacialli F, Samorì P. Photoinduced work function changes by isomerization of a densely packed azobenzene-based SAM on Au: a joint experimental and theoretical study. Phys Chem Chem Phys 2011; 13:14302-10. [DOI: 10.1039/c1cp20851a] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Vela P, Sivera F, Batlle-Gualda E, Mayor M, García-Manzanares A, Pascual E. Severe ischemia following treatment with rituximab in a patient with mixed connective tissue disease: an unusual complication. Lupus 2010; 19:1005-6. [DOI: 10.1177/0961203310369145] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- P. Vela
- Rheumatology Department, Hospital General Universitario de Alicante, Alicante, Spain,
| | - F. Sivera
- Rheumatology Department, Hospital General Universitario de Alicante, Alicante, Spain
| | - E. Batlle-Gualda
- Rheumatology Department, Hospital General Universitario de Alicante, Alicante, Spain
| | - M. Mayor
- Rheumatology Department, Hospital Rafael Mendez, Lorca, Murcia, Spain
| | | | - E. Pascual
- Rheumatology Department, Hospital General Universitario de Alicante, Alicante, Spain
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Ibarrola-Villava M, Peña-Chilet M, Avilés J, Feito M, Mayor M, Pizarro A, Martin-Gonzalez M, Lazaro P, Ribas G. 58 Human DNArepair genes and genetic susceptibility to melanoma: a candidate gene approach using sequenom platform. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70867-3] [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: 11/17/2022] Open
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Desort M, Lagrange AM, Galland F, Udry S, Mayor M. Planets and brown dwarfs around A–F main-sequence stars: performances of radial-velocity surveys with HARPS and first detections. ACTA ACUST UNITED AC 2010. [DOI: 10.1051/eas/1041006] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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17
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Abstract
We present the case of a 46 year-old man with Multiple Symmetric Lipomatosis (MSL), an infrequent disease with an unknown aetiology. MSL is characterized by multiple masses of adipose tissue and it is usually associated with alcoholism, metabolic disorders and neuropathy. We describe the clinical-morphological characteristics of the lesions it presents, the exploratory findings, cervical CAT, the analytical results and the results of subcutaneous biopsy. MSL type I disease was diagnosed. The treatment of choice, the lipectomy, was performed, making it possible to obtain a substantial disease improvement, both physical and aesthetically.
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Affiliation(s)
- M Mayor
- Centro de Salud de Chantrea, Pamplona, Spain
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Arillo A, Vilches C, Mayor M, Gurpegui JR, Arroyo C, Extremera V. [Frequent users and difficult patients: how do they feel about their treatment by doctors?]. An Sist Sanit Navar 2006; 29:47-58. [PMID: 16670729 DOI: 10.4321/s1137-66272006000100005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND To determine the opinions and expectations of difficult, frequent user, patients about their relationship with their GP. MATERIAL AND METHODS Qualitative design. Discussion groups. Invitation to a meeting at the Chantrea Health Centre (Pamplona). The participants were frequent users of the health centre in the year 2003, who had been defined as "difficult"--according to previously defined criteria--by each of the 12 doctors of the health centre. Excluded were patients with mental retardation, severe hearing problems, severe mental illness, difficulties in mobility and travelling, and over 70 years of age. Groups were formed from amongst the 112 preselected patients. Four groups were designed: "older" persons (GMA) of 46 to 70 years (14); "women" (GMU) of 31 to 45 years (14); "men" (GHO) of 31 to 45 years (13) and "youths" (GJO) of 16 to 30 years (12). The patients were invited by letter and by a subsequent telephone confirmation to a meeting, the content of which was not specified. Sessions of 2 hours duration were held with each of the groups formed. Audio recording, with prior authorization, and verbatim transcription of sessions. Discussion and content analysis by the research group resulting in lines of consensus. RESULTS The three groups of older patients were formed with a total of 16 participants. The group of youths was not formed since the figure for attendance did not reach the number of 3 or more after three appointments. CONCLUSIONS From the perspective of the patient it is very important that there should be efficient communication with the doctor. Awareness of a state of frequent use was not detected in those attending. They feel themselves to be chronic patients who need frequent attention. Satisfaction at the treatment received was observed as well as an understanding attitude towards the organisational limitations of the health centre. They did not give verbal expression to the existence of conflictive relations with their GPs.
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Affiliation(s)
- A Arillo
- Centro de Salud Chantrea, Pamplona.
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20
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Li Z, Han B, Meszaros G, Pobelov I, Wandlowski T, Błaszczyk A, Mayor M. Two-dimensional assembly and local redox-activity of molecular hybrid structures in an electrochemical environment. Faraday Discuss 2006; 131:121-43; discussion 205-20. [PMID: 16512368 DOI: 10.1039/b506623a] [Citation(s) in RCA: 118] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The self-assembly and redox-properties of two viologen derivatives, N-hexyl-N'-(6-thiohexyl)-4,4'-bipyridinium bromide (HS-6V6-H) and N,N'-bis(6-thiohexyl)-4,4'-bipyridinium bromide (HS-6V6-SH), immobilized on Au(lll)-(1 x 1) macro-electrodes were investigated by cyclic voltammetry, surface enhanced infrared spectroscopy (SEIRAS) and in situ scanning tunneling microscopy (STM). Depending on the assembly conditions one could distinguish three different types of adlayers for both viologens: a low coverage disordered and an ordered "striped" phase of flat oriented molecules as well as a high coverage monolayer composed of tilted viologen moieties. Both molecules, HS-6V6-H and HS-6V6-SH, were successfully immobilized on Au(poly) nano-electrodes, which gave a well-defined redox-response in the lower pA-current range. An in situ STM configuration was employed to explore electron transport properties of single molecule junctions Au(T)/HS-6V6-SH(HS-6V6-H)/Au(S). The observed sigmoidal potential dependence, measured at variable substrate potential E(S) and at constant bias voltage (E(T) - E(S)), was attributed to electronic structure changes of the viologen moiety during the one-electron reduction/re-oxidation process V2+ < -- > V+*. Tunneling experiments in asymmetric, STM-based junctions Au(T)-S-6V6-H/Au(S) revealed current (i(T))-voltage (E(T)) curves with a maximum located at the equilibrium potential of the redox-process V2+ < -- > V+*. The experimental i(T)--E(T) characteristics of the HS-6V6-H-modified tunneling junction were tentatively attributed to a sequential two-step electron transfer mechanism.
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Affiliation(s)
- Z Li
- Institute of Surfaces and Interfaces ISG 3 and cni, Research Center Jülich GmH, D-52425 Jülich, Germany
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21
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Abstract
INTRODUCTION The natural history of stings, the clinical reaction of the patient and in vivo and in vitro tests are necessary parameters to assess before initiating Hymenoptera venom immunotherapy. In the decision to initiate immunotherapy with Hymenoptera venom, it is not usual to evaluate the natural history of the disease, which seems to be self-limiting and therefore of variable clinical significance. OBJECTIVES Our aim was to determine the natural history of Hymenoptera hypersensitivity over 4 consecutive years in a rural Mediterranean population. METHODS An epidemiological study of Hymenoptera sting reactions and possible sensitivity was carried out in 145 randomly selected subjects out of a rural Mediterranean population of 600. Seventy-two subjects, including those with a history of anaphylaxis, completed the 4-year study. The nature of their clinical reactions, age, sex, history of atopy, profession, family history of reactions to Hymenoptera insects, time elapsed since the last sting, number of stings and specific IgE and IgG were determined (the latter, to the three most important insects in the area: Apis mellifera, Polistes dominulus, and Vespula germanica). RESULTS Of the 72 subjects, four subjects had systemic reactions (SR), 23 had large local reaction (LLR) and all the others (117) was minor local reactions. None who had experienced an SR had a repeat SR when re-stung over the 4-year study. Of those with LLR, 12 subjects had the same type of reaction and 11 experienced more mild local reactions when re-stung. In the SR and local reaction groups, IgE to honey bee (Hb) increased significantly during the study period, whereas in those with only LLR, specific IgE to wasp (Polistes) decreased. Specific IgG to Polistes and Vespula (wasps) decreased significantly, whereas there was no change in the specific IgG to Hb in any of the groups. The number of stings per year decreased at the end of the study in all groups, but positive-specific IgG was higher in subjects with the greatest number of stings. On multivariate analysis using logistic regression, the existence of specific IgE to bee venom, male sex, being an agricultural worker, age of over 16 years and more than five stings per year are seen as individual or co-factors for developing SR or LLR. CONCLUSIONS The prevalence of SR was 2.8% in our Mediterranean population. The evolution of IgE and IgG throughout the 4-year study differed depending on the Hymenoptera studied. Adult male agricultural workers are at greater risk of having SR or LLR, especially when they have specific IgE to Hb and suffer from more than five stings every 4 years.
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Affiliation(s)
- J Fernandez
- Department of Medicine, Allergy Section, Elche Hospital, Miguel Hernández University, Elche, Alicante, Spain.
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22
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Pérez-España L, Prats I, Sanz A, Mayor M. [High prevalence of sebaceous hyperplasias in renal transplants]. Nefrologia 2003; 23:179-80. [PMID: 12778886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023] Open
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Vidal-Madjar A, Des Etangs AL, Désert JM, Ballester GE, Ferlet R, Hébrard G, Mayor M. An extended upper atmosphere around the extrasolar planet HD209458b. Nature 2003; 422:143-6. [PMID: 12634780 DOI: 10.1038/nature01448] [Citation(s) in RCA: 882] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2002] [Accepted: 01/27/2003] [Indexed: 11/09/2022]
Abstract
The planet in the system HD209458 is the first one for which repeated transits across the stellar disk have been observed. Together with radial velocity measurements, this has led to a determination of the planet's radius and mass, confirming it to be a gas giant. But despite numerous searches for an atmospheric signature, only the dense lower atmosphere of HD209458b has been observed, through the detection of neutral sodium absorption. Here we report the detection of atomic hydrogen absorption in the stellar Lyman alpha line during three transits of HD209458b. An absorption of 15 +/- 4% (1sigma) is observed. Comparison with models shows that this absorption should take place beyond the Roche limit and therefore can be understood in terms of escaping hydrogen atoms.
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Affiliation(s)
- A Vidal-Madjar
- Institut d'Astrophysique de Paris, CNRS/UPMC, 98bis boulevard Arago, F-75014 Paris, France.
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Abstract
Recently a new entity, postmenopausal frontal fibrosing alopecia, was added to the established subtypes of scarring alopecias affecting postmenopausal women. This condition is characterized by a progressive frontal hairline recession associated with scarring. We studied the clinical and histopathologic features in four women with this disorder. Of note, a history of bilateral oophorectomy in two of them appears to be a new association. All four cases had frontoparietal recession of the hairline and two of them also had loss of their eyebrows. None of our four patients had any mucous membrane or other skin lesions. Histological examination showed perifollicular fibrosis and lymphocytic inflammation around the isthmus and infundibular areas of the follicles. No effective treatments have emerged for this type of postmenopausal alopecia, but progression of the hair loss and scarring appears to be self-limiting. We believe that this condition is a distinct clinicopathological variant of lichen planopilaris.
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Affiliation(s)
- E Naz
- Department of Dermatology, University Hospital La Paz, Madrid, Spain.
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Weber H, Reichert J, Weigend F, Ochs R, Beckmann D, Mayor M, Ahlrichs R, Löhneysen H. Electronic transport through single conjugated molecules. Chem Phys 2002. [DOI: 10.1016/s0301-0104(02)00343-9] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Reichert J, Ochs R, Beckmann D, Weber HB, Mayor M, Löhneysen HV. Driving current through single organic molecules. Phys Rev Lett 2002; 88:176804. [PMID: 12005775 DOI: 10.1103/physrevlett.88.176804] [Citation(s) in RCA: 299] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2001] [Indexed: 05/21/2023]
Abstract
We investigate electronic transport through two types of conjugated molecules. Mechanically controlled break junctions are used to couple thiol end groups of single molecules to two gold electrodes. Current-voltage characteristics ( IVs) of the metal-molecule-metal system are observed. These IVs reproduce the spatial symmetry of the molecules with respect to the direction of current flow. We hereby unambiguously detect an intrinsic property of the molecule and are able to distinguish the influence of both the molecule and the contact to the metal electrodes on the transport properties of the compound system.
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Affiliation(s)
- J Reichert
- Forschungszentrum Karlsruhe, Institut für Nanotechnologie, D-76021 Karlsruhe, Germany
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27
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Abstract
Pairs of reducible pentakis(thiophenyl)benzene subunits are linked by different molecular structures as model compounds for reducible molecular-wire-type synthons showing varying electron-transfer ability as a function of the bridging structures, consisting of either para-divinylbenzene, bis-hydrazone, or diacetylene. Their electron-transfer ability from one reducible subunit to the other was investigated by electrochemical and spectroelectrochemical methods. In the case of the bis-hydrazone bridge and the diacetylene bridge, the solid-state structures support the experimental findings. While the para-divinylbenzene bridge completely isolates the reducible subunits (class I system) the diacetylene bridge electronically connects the two reducible structures (class III system), demonstrating its potential application as a "molecular wire." The bis-hydrazone linked dimer displays electronic communication only to a small extend, which was only observed in the spectroelectrochemical investigation. The diacetylene connection as active electron-transfer linker together with poly(thiophenyl)benzene as reducible subunits was used to design more complex molecular architectures. Linear rodlike structures did allow adjustment of the length of these type of molecular wires and investigation of the extent of electron mobility. Cyclic structures addressed the possibility of moving electrons on a bent molecular wire.
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Affiliation(s)
- M Mayor
- Forschungszentrum Karlsruhe GmbH, Institut für Nanotechnologie, D-76021 Karlsruhe, Germany
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Abstract
Current models of the evolution of the known extrasolar planetary systems need to incorporate orbital migration and/or gravitational interactions among giant planets to explain the presence of large bodies close to their parent stars. These processes could also lead to planets being ingested by their parent stars, which would alter the relative abundances of elements heavier than helium in the stellar atmospheres. In particular, the abundance of the rare 6Li isotope, which is normally destroyed in the early evolution of solar-type stars but preserved intact in the atmospheres of giant planets, would be boosted substantially. 6Li has not hitherto been observed reliably in a metal-rich star, where metallicity refers to the total abundance of elements heavier than helium. Here we report the discovery of 6Li in the atmosphere of the metal-rich solar-type star HD82943, which is known to have an orbiting giant planet. The presence of 6Li can probably be interpreted as evidence for a planet (or planets) having been engulfed by the parent star.
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Affiliation(s)
- G Israelian
- Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain.
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29
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Abstract
"Dimers" 3, 4 and 7, which consist of two reducible pentakis(thiophenyl)benzene subunits linked by different molecular structures, have been synthesised as model compounds for reducible molecular-wire-type synthons to represent differences in the electron-transfer ability as a function of the bridging structure. The bridging units consist of para-divinylbenzene in 3, bis-hydrazone in 4 and diacetylene in 7. Their ability to transfer electrons from one reducible subunit to the other was investigated by electrochemical and spectroelectrochemical methods and, in the case of 4 and 7, the solid-state structures support the experimental findings. The para-divinylbenzene bridge in 3 was found to completely isolate the reducible structures (Class I system). In contrast, the diacetylene bridge in 7 electronically connects the two reducible structures (Class III system) and, thus, demonstrates its potential application as a "molecular wire". The bis-hydrazone-linked compound 4 displayed only a low level of electronic connection between the subunits and was only observed in the spectroelectrochemical investigation.
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Affiliation(s)
- M Mayor
- Forschungszentrum Karlsruhe GmbH, Institut für Nanotechnologie, Germany.
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30
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Abstract
BACKGROUND Mondor's disease is a rare entity characterized by thrombophlebitis of the subcutaneous veins of the anterolateral thoraco-abdominal wall. The most common clinical manifestations are a painful subcutaneous cord, sensation of tension, and skin retraction. This condition is usually a benign and self-limited process, although it has been associated with breast cancer. METHODS We describe four new cases, two men and two women, and comment on the clinical signs and possible etiopathogenic features. General physical examination, radiologic and ecographic studies, laboratory analysis including tumor markers, and exhaustive coagulation study were carried out on all patients. RESULTS No cases were associated with malignant disease and/or hypercoagulability stage. With conservative treatment, the evolution proved favorable in all patients. CONCLUSIONS Mondor's disease is usually a benign and self-limited process, but we recommend laboratory studies and physical examination, including mammography in women, in order to rule out the presence of systemic disorders, especially breast cancer.
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Affiliation(s)
- M Mayor
- Departments of Dermatology and Pathology, Hospital Universitario La Paz, Madrid, Spain
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Mayor M, Buron I, Diaz R, Hernandez N, Naz E, Ruano M, Casado M. Pseudotumoral hyperplastic form of oral candidiasis. Med Oral 2000; 5:311-315. [PMID: 11507568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- M. Mayor
- Servicio de Dermatologia. Hospital Universitario la Paz. Madrid. Spain
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Mash DC, Kovera CA, Pablo J, Tyndale RF, Ervin FD, Williams IC, Singleton EG, Mayor M. Ibogaine: complex pharmacokinetics, concerns for safety, and preliminary efficacy measures. Ann N Y Acad Sci 2000; 914:394-401. [PMID: 11085338 DOI: 10.1111/j.1749-6632.2000.tb05213.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ibogaine is an indole alkaloid found in the roots of Tabernanthe Iboga (Apocynaceae family), a rain forest shrub that is native to western Africa. Ibogaine is used by indigenous peoples in low doses to combat fatigue, hunger and thirst, and in higher doses as a sacrament in religious rituals. Members of American and European addict self-help groups have claimed that ibogaine promotes long-term drug abstinence from addictive substances, including psychostimulants and opiates. Anecdotal reports attest that a single dose of ibogaine eliminates opiate withdrawal symptoms and reduces drug craving for extended periods of time. The purported efficacy of ibogaine for the treatment of drug dependence may be due in part to an active metabolite. The majority of ibogaine biotransformation proceeds via CYP2D6, including the O-demethylation of ibogaine to 12-hydroxyibogamine (noribogaine). Blood concentration-time effect profiles of ibogaine and noribogaine obtained for individual subjects after single oral dose administrations demonstrate complex pharmacokinetic profiles. Ibogaine has shown preliminary efficacy for opiate detoxification and for short-term stabilization of drug-dependent persons as they prepare to enter substance abuse treatment. We report here that ibogaine significantly decreased craving for cocaine and heroin during inpatient detoxification. Self-reports of depressive symptoms were also significantly lower after ibogaine treatment and at 30 days after program discharge. Because ibogaine is cleared rapidly from the blood, the beneficial aftereffects of the drug on craving and depressed mood may be related to the effects of noribogaine on the central nervous system.
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Affiliation(s)
- D C Mash
- Department of Neurology, University of Miami School of Medicine, Florida 33136, USA.
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33
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Mazeh T, Naef D, Torres G, Latham DW, Mayor M, Beuzit JL, Brown TM, Buchhave L, Burnet M, Carney BW, Charbonneau D, Drukier GA, Laird JB, Pepe F, Perrier C, Queloz D, Santos NC, Sivan JP, Udry S, Zucker S. The Spectroscopic Orbit of the Planetary Companion Transiting HD 209458. Astrophys J 2000; 532:L55-L58. [PMID: 10702131 DOI: 10.1086/312558] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We report a spectroscopic orbit with period P=3.52433+/-0.00027 days for the planetary companion that transits the solar-type star HD 209458. For the metallicity, mass, and radius of the star, we derive [Fe/H&sqbr0;=0.00+/-0.02, M*=1.1+/-0.1 M middle dot in circle, and R*=1.2+/-0.1 R middle dot in circle. This is based on a new analysis of the iron lines in our HIRES template spectrum and also on the absolute magnitude, effective temperature, and color of the star, and it uses isochrones from four different sets of stellar evolution models. Using these values for the stellar parameters, we reanalyze the transit data and derive an orbital inclination of i=86&fdg;1+/-1&fdg;6. For the planet, we derive a mass of Mp=0.69+/-0.05 MJup, a radius of Rp=1.40+/-0.17 RJup, and a density of rho=0.31+/-0.07 g cm-3.
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Charbonneau D, Brown TM, Latham DW, Mayor M. Detection of Planetary Transits Across a Sun-like Star. Astrophys J 2000; 529:L45-L48. [PMID: 10615033 DOI: 10.1086/312457] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We report high-precision, high-cadence photometric measurements of the star HD 209458, which is known from radial velocity measurements to have a planetary-mass companion in a close orbit. We detect two separate transit events at times that are consistent with the radial velocity measurements. In both cases, the detailed shape of the transit curve due to both the limb darkening of the star and the finite size of the planet is clearly evident. Assuming stellar parameters of 1.1 R middle dot in circle and 1.1 M middle dot in circle, we find that the data are best interpreted as a gas giant with a radius of 1.27+/-0.02 RJup in an orbit with an inclination of 87&fdg;1+/-0&fdg;2. We present values for the planetary surface gravity, escape velocity, and average density and discuss the numerous observations that are warranted now that a planet is known to transit the disk of its parent star.
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Alaeddini J, Julliard K, Shah A, Islam J, Mayor M. Physician attitudes toward palliative care at a community teaching hospital. Hosp J 2000; 15:67-86. [PMID: 11271160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
The goals of the study were to explore physicians' attitudes and opinions about palliative care and its implementation. Four focus groups composed of attending physicians were conducted by a professional facilitator at a community teaching hospital. The audio-tapes of the groups were carefully transcribed and analyzed according to rigorous qualitative methodology. Physicians perceived palliative care and pain control as important. Problems they perceived were a lack of education for physicians, residents, other health care professionals, and the general public; a lack of hospital support systems to implement palliative care appropriately, and a lack of knowledge and support regarding legal considerations. They believed that a palliative care unit was a reasonable tool to overcome many obstacles to good end-of-life care.
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Affiliation(s)
- J Alaeddini
- Lutheran Medical Center, 150-55th Street, Room 3711, Brooklyn, NY 11220, USA
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Hernández-Cano N, De Lucas R, Lázaro TE, Mayor M, Burón I, Casado M. Erythema elevatum diutinum after liver transplantation: disappearance of the lesions associated with a reduction in cyclosporin dosage. Pediatr Dermatol 1998; 15:411-2. [PMID: 9796601 DOI: 10.1046/j.1525-1470.1998.1998015411.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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39
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Ginzburg E, Dygert J, Parra-Davila E, Lynn M, Almeida J, Mayor M. Coronary artery stenting for occlusive dissection after blunt chest trauma. J Trauma 1998; 45:157-61. [PMID: 9680032 DOI: 10.1097/00005373-199807000-00034] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- E Ginzburg
- University of Miami School of Medicine, Florida 33101, USA
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Hernández-Cano N, Pizarro A, Lázaro TE, Mayor M, Burón I, Contreras F, Casado M. Nonscarring alopecia associated with solitary circumscribed neuroma. Dermatology 1998; 195:265-7. [PMID: 9407176 DOI: 10.1159/000245957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We report an unusual case of nonscarring alopecia clinically resembling patchy alopecia areata around central solitary circumscribed neuroma. Prompt and spontaneous complete hair regrowth was observed after removal of the tumor. Further knowledge of growth factor and receptor interaction in regulating the hair follicle cycle, as well as on the production of growth factors and cytokines by tumor cells and/or cells within the tumor microenvironment may contribute to better understand the pathologic mechanisms underlying certain curious phenomena such as peritumoral nonscarring alopecia.
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Affiliation(s)
- N Hernández-Cano
- Department of Dermatology, La Paz University Hospital, Autonomous University of Madrid, Spain
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Rubio FA, Pizarro A, Robana G, Mayor M, Buron I, Contreras F, Casedo M. Eyelid metastasis as the presenting sign of recurrent carcinoma of the breast. Br J Dermatol 1997; 137:1026-7. [PMID: 9470938 DOI: 10.1111/j.1365-2133.1997.tb01582.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Rivera Del Rio JR, Gomez MA, Dominguez M, Roman M, Perez L, Mayor M, Valentin A, Hunter Mellado R. Impact of thrombolytic therapy for myocardial infarction in the Bayamón Public Health Care Sector--1993-1995 experience. Bol Asoc Med P R 1997; 89:15-20. [PMID: 9168631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
UNLABELLED The study was designed to evaluate the compliance of general management guidelines, determine the effectiveness of Thrombolytic therapy (TTX), determine the complications, statistics and the "Door to Needle" time (DTN) in the management of Myocardial Infarction (MI) in the Bayamón public health care sector. METHODS Retrospective record review and SPSS statistical calculations were performed. RESULTS 66 cases (49m, 17f) discharged with MI from January 1993 to June 1995 were included. 27 received TTX. 80% were between 30-69 y/o, while 20% from 70-87 y/o. Past hx and habits; smoker 62%, ETOH 45%. Labs in adm; hypoMG 15%, hypoK 11%. The Q MI = 63%, Non Q = 38%. The sinoatrial and ventricular arrhythmias were seldom seen (7.5% SVT, AIVR 3%). Intra and atrioventricular block (3%). The most frequent cardiac complication was CHF 10% and the non cardiac; BKP 16.5%. The mortality was (6.1%). The mean stay was 9.34 days. Therapy used; IV NTG 97%, ASA 84%, beta B 39%, TTX 42.2%, ACE inhibitors 32%. Absence of TTX was usually due to absence of EKG criteria (63%). TTX complications; hypotension 10.5%. The mean DTN was 1hr 58m,. 91% were discharged home, 23.3% cath, deaths 6%. The ER MD assessment of MI was correct in only 29%. CONCLUSIONS The complications of patients with MI in the TTX era are below the ones before TTX. Mortality and morbidity have improved with the use of TTX. The medical therapy guidelines of MI are generally followed in HURRA. Improvement in the DTN is needed. The prolonged DTN and the inconsistency of the admission assessment by the ER personnel establishes the need to develop a training program which would regulate this abnormality.
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Abstract
We report a patient with an undiagnosed left sinus of Valsalva aneurysm who, during a dobutamine stress test, had myocardial injury and subsequent infarction. Cardiac catheterization revealed an expanding sinus of valsalva aneurysm compressing the circumflex coronary artery. The clinical manifestations of sinus of Valsalva aneurysm are discussed. This report heightens awareness of the possible effects of the pharmacologic stress test.
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Affiliation(s)
- A C Ferreira
- Department of Medicine, University of Miami School of Medicine, FL 33136, USA
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Baron JA, Karagas M, Barrett J, Kniffin W, Malenka D, Mayor M, Keller RB. Basic epidemiology of fractures of the upper and lower limb among Americans over 65 years of age. Epidemiology 1996; 7:612-8. [PMID: 8899387 DOI: 10.1097/00001648-199611000-00008] [Citation(s) in RCA: 286] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Current knowledge regarding the basic epidemiology of fractures is largely limited to a few fracture sites, notably those of the hip and distal forearm. To clarify the patterns of incidence of limb fractures in the elderly, we used data from a 5% sample of the U.S. Medicare population over age 65 years during the years 1986-1990. We identified incident fractures of the proximal humerus, other parts of the humerus, proximal radius/ ulna, shaft of the radius/ulna, distal radius/ulna, pelvis, hip, other parts of the femur, patella, ankle, and other parts of the tibia/fibula from diagnoses and procedures coded on claims for inpatient services, outpatient facility use, and physician services. We used Poisson regression to investigate the relation between demographic factors and fracture risk at these sites. Fractures at the hip were the most common, accounting for 38% of the fractures identified. The proximal humerus, distal radius/ulna, and ankle also were common fracture sites. A pattern of rapidly rising rates with age was seen for fractures of the pelvis, hip, and other parts of the femur among women. Fractures distal to the elbow or knee, however, had, at most, modest increases in incidence with age over 65 years. For each of the fractures studied, women had higher rates than men of the same race, and whites generally had higher rates than blacks of the same gender. Gender-related differences in risk were larger among whites than among blacks, and racial differences in risk were more marked among women than among men.
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Affiliation(s)
- J A Baron
- Department of Medicine, Dattmouth Medical School, Hanover, NH 03755-3861, USA
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Baranne A, Queloz D, Mayor M, Adrianzyk G, Knispel G, Kohler D, Lacroix D, Meunier JP, Rimbaud G, Vin A. ELODIE: A spectrograph for accurate radial velocity measurements. ACTA ACUST UNITED AC 1996. [DOI: 10.1051/aas:1996251] [Citation(s) in RCA: 811] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Branger B, Zabadani B, Vecina F, Mayor M, Dracon M. Late relapse of rapidly progressive glomerulonephritis (RPGN) in a transplant patient: efficacy of apheresis. Transplant Proc 1995; 27:1748. [PMID: 7725485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- B Branger
- Nephrology Department, University Hospital, Nimes, France
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Castellanos A, Cox MM, Fernandez PR, Interian A, Mayor M, Ravina T, Myerburg RJ. Mechanisms and dynamics of episodes of progression of 2:1 atrioventricular block in patients with documented two-level conduction disturbances. Am J Cardiol 1992; 70:193-9. [PMID: 1626506 DOI: 10.1016/0002-9149(92)91274-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Twenty episodes of progression of 2:1 atrioventricular (AV) block were identified during incremental atrial stimulation in 7 patients with documented (2-level) block in the AV node and His-Purkinje system. All occurred at cycle lengths shorter than those at which stable 2:1 HV block had been detected. Thirteen episodes were typical since 2:1 increased to 3:1 AV block when an atrio-His (AH) Wenckebach period was completed with an atrial impulse that otherwise would have been conducted. These episodes occurred with dynamic A(M): V(N) ratios similar to those seen at the AV node. Seven atypical episodes were identified (while AH Wenckebach periods were occurring): (1) 2:1 increasing to 3:1 AV block and then to 4:1 AV block resulting from prolonged refractoriness in the His-Purkinje system subsequently followed by concealed conduction in the latter structure; (2) conversion of 3:2 directly into 3:1 AV block due to block of the next-to-last atrial impulse in the His-Purkinje system with completion of AH Wenckebach period with the following atrial impulse; and (3) 4:2 AV block presumably due to supernormal conduction in a transversely dissociated His-Purkinje system. These episodes occurred with A(M): V(N) ratios, which in other structures would have been indicative of different degrees of AV block. In conclusion, progression of 2:1 AV block during documented 2 level conduction disturbances (1) can be explained by mechanisms different than those currently known, and (2) has rich, but different dynamics from those observed exclusively in the AV node and exclusively in the His-Purkinje system.
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Affiliation(s)
- A Castellanos
- Department of Medicine, University of Miami School of Medicine, Florida 33101
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Abstract
Left ventricular (LV) diastolic filling pattern of obese subjects with eccentric LV hypertrophy was studied. Findings were compared with those of normal control subjects and hypertensive patients with concentric LV hypertrophy. M-mode, 2-dimensional and Doppler echocardiograms were recorded in 11 obese (body mass index greater than 30 kg/m2) normotensive patients with eccentric LV hypertrophy, 10 normal control subjects, and 18 nonobese, hypertensive patients with concentric LV hypertrophy whose antihypertensive medications were discontinued 2 weeks before study. LV hypertrophy was defined as LV mass/height greater than 143 g/m. Hypertrophy in the obese patients was eccentric: Their LV internal dimension (61 +/- 3 mm) was greater than that of hypertensive patients (55 +/- 5 mm, p less than 0.001) and normal control subjects (55 +/- 2 mm, p less than 0.01); their septal (10.7 +/- 0.7 mm) and posterior (10.9 +/- 0.6 mm) wall thicknesses were smaller than those of the hypertensive patients (12.2 +/- 1.7 mm, p less than 0.05 and 11.7 +/- 1.2 mm, respectively, difference not significant). Pulsed-wave Doppler echocardiographic filling indexes were used to evaluate LV diastolic filling. Obese patients had a higher peak velocity of atrial filling (69 +/- 14 vs 54 +/- 15 cm/s, p less than 0.05), lower early/atrial filling velocity ratio (1.0 +/- 0.26 vs 1.32 +/- 0.21, p less than 0.05), prolonged deceleration half-time (108 +/- 9 vs 86 +/- 15 ms, p less than 0.01) and lower peak filling rate corrected to stroke volume (4.08 +/- 0.68 vs 4.96 +/- 0.88 stroke volume/s, p less than 0.05) than normal control subjects.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- S Chakko
- Medical Service, Veterans Administration Medical Center, Miami, Florida 33125
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Moskowitz RW, Davis W, Sammarco J, Martens M, Baker J, Mayor M, Burstein AH, Frankel VH. Experimentally induced degenerative joint lesions following partial meniscectomy in the rabbit. Arthritis Rheum 1973; 16:397-405. [PMID: 4708019 DOI: 10.1002/art.1780160317] [Citation(s) in RCA: 180] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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