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Le Parc R, Ranieri V, Haines J, Cambon M, Cambon O, Levelut C, Clément S. In situ high pressure and high temperature Raman studies of (1-x)SiO(2)xGeO(2) glasses. J Phys Condens Matter 2009; 21:375109. [PMID: 21832340 DOI: 10.1088/0953-8984/21/37/375109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The structure of glasses in the binary system SiO(2)-GeO(2) has been studied by Raman spectroscopy. Our results are consistent with mixing of SiO(2) and GeO(2) tetrahedra. The changes induced by temperature and by pressure on the structure are monitored by in situ measurements on the same mixed glasses. Anomalous temperature dependences are observed not only for SiO(2) glass and GeO(2) glass but also for mixed glasses. Particular attention is focused on the pressure densification mechanism in mixed glasses. Via the pressure dependence of the width of the main Raman band, we show that the compression mechanism in mixed glasses is intermediate between that of the end members.
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Affiliation(s)
- R Le Parc
- Laboratoire des Colloides Verres et Nanomatériaux, UMR CNRS-UM2 5587, Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
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52
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Krbal M, Kolobov AV, Haines J, Fons P, Levelut C, Le Parc R, Hanfland M, Tominaga J, Pradel A, Ribes M. Initial structure memory of pressure-induced changes in the phase-change memory alloy Ge2Sb2Te5. Phys Rev Lett 2009; 103:115502. [PMID: 19792382 DOI: 10.1103/physrevlett.103.115502] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2009] [Indexed: 05/28/2023]
Abstract
We demonstrate that while the metastable face-centered cubic (fcc) phase of Ge2Sb2Te5 becomes amorphous under hydrostatic compression at about 15 GPa, the stable trigonal phase remains crystalline. Upon higher compression, a body-centered cubic phase is obtained in both cases around 30 GPa. Upon decompression, the amorphous phase is retained for the starting fcc phase while the initial structure is recovered for the starting trigonal phase. We argue that the presence of vacancies and associated subsequent large atomic displacements lead to nanoscale phase separation and loss of initial structure memory in the fcc staring phase of Ge2Sb2Te5.
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Affiliation(s)
- M Krbal
- Institut Charles Gerhardt, UMR 5253 CNRS-UM2-ENSCM-UM1, PMDP/PMOF, Université Montpellier II, Place Eugène Bataillon, Montpellier Cedex 5, France
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53
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Haines J, Gioia A, Papet P, Isnard O, Gaubil M, Cabodi I. NPD study of doped ZrO2up to 1500°C: implications for glass furnace refractory walls. Acta Crystallogr A 2009. [DOI: 10.1107/s010876730909597x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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54
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Rouquette J, Haines J, Fraysse G, Al-Zein A, Bornand V, Pintard M, Papet P, Hull S, Gorelli FA. High-Pressure Structural and Vibrational Study of PbZr0.40Ti0.60O3. Inorg Chem 2008; 47:9898-904. [DOI: 10.1021/ic8008688] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Rouquette
- Institut Charles Gerhardt UMR CNRS 5253, Université de Montpellier II Sciences et Techniques du Languedoc, Equipe Physico-chimie des Matériaux Organisés Fonctionnels, Place E. Bataillon cc 1503, 34095 Montpellier cedex, France, Laboratoire des Colloïdes, Verres et Nanomatériaux (LCVN), UMR 5587 CNRS, University of Montpellier II, F-34095 Montpellier, France, The ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom, and LENS and INFM, Via Nello Carrara 1,
| | - J. Haines
- Institut Charles Gerhardt UMR CNRS 5253, Université de Montpellier II Sciences et Techniques du Languedoc, Equipe Physico-chimie des Matériaux Organisés Fonctionnels, Place E. Bataillon cc 1503, 34095 Montpellier cedex, France, Laboratoire des Colloïdes, Verres et Nanomatériaux (LCVN), UMR 5587 CNRS, University of Montpellier II, F-34095 Montpellier, France, The ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom, and LENS and INFM, Via Nello Carrara 1,
| | - G. Fraysse
- Institut Charles Gerhardt UMR CNRS 5253, Université de Montpellier II Sciences et Techniques du Languedoc, Equipe Physico-chimie des Matériaux Organisés Fonctionnels, Place E. Bataillon cc 1503, 34095 Montpellier cedex, France, Laboratoire des Colloïdes, Verres et Nanomatériaux (LCVN), UMR 5587 CNRS, University of Montpellier II, F-34095 Montpellier, France, The ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom, and LENS and INFM, Via Nello Carrara 1,
| | - A. Al-Zein
- Institut Charles Gerhardt UMR CNRS 5253, Université de Montpellier II Sciences et Techniques du Languedoc, Equipe Physico-chimie des Matériaux Organisés Fonctionnels, Place E. Bataillon cc 1503, 34095 Montpellier cedex, France, Laboratoire des Colloïdes, Verres et Nanomatériaux (LCVN), UMR 5587 CNRS, University of Montpellier II, F-34095 Montpellier, France, The ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom, and LENS and INFM, Via Nello Carrara 1,
| | - V. Bornand
- Institut Charles Gerhardt UMR CNRS 5253, Université de Montpellier II Sciences et Techniques du Languedoc, Equipe Physico-chimie des Matériaux Organisés Fonctionnels, Place E. Bataillon cc 1503, 34095 Montpellier cedex, France, Laboratoire des Colloïdes, Verres et Nanomatériaux (LCVN), UMR 5587 CNRS, University of Montpellier II, F-34095 Montpellier, France, The ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom, and LENS and INFM, Via Nello Carrara 1,
| | - M. Pintard
- Institut Charles Gerhardt UMR CNRS 5253, Université de Montpellier II Sciences et Techniques du Languedoc, Equipe Physico-chimie des Matériaux Organisés Fonctionnels, Place E. Bataillon cc 1503, 34095 Montpellier cedex, France, Laboratoire des Colloïdes, Verres et Nanomatériaux (LCVN), UMR 5587 CNRS, University of Montpellier II, F-34095 Montpellier, France, The ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom, and LENS and INFM, Via Nello Carrara 1,
| | - Ph. Papet
- Institut Charles Gerhardt UMR CNRS 5253, Université de Montpellier II Sciences et Techniques du Languedoc, Equipe Physico-chimie des Matériaux Organisés Fonctionnels, Place E. Bataillon cc 1503, 34095 Montpellier cedex, France, Laboratoire des Colloïdes, Verres et Nanomatériaux (LCVN), UMR 5587 CNRS, University of Montpellier II, F-34095 Montpellier, France, The ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom, and LENS and INFM, Via Nello Carrara 1,
| | - S. Hull
- Institut Charles Gerhardt UMR CNRS 5253, Université de Montpellier II Sciences et Techniques du Languedoc, Equipe Physico-chimie des Matériaux Organisés Fonctionnels, Place E. Bataillon cc 1503, 34095 Montpellier cedex, France, Laboratoire des Colloïdes, Verres et Nanomatériaux (LCVN), UMR 5587 CNRS, University of Montpellier II, F-34095 Montpellier, France, The ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom, and LENS and INFM, Via Nello Carrara 1,
| | - F. A. Gorelli
- Institut Charles Gerhardt UMR CNRS 5253, Université de Montpellier II Sciences et Techniques du Languedoc, Equipe Physico-chimie des Matériaux Organisés Fonctionnels, Place E. Bataillon cc 1503, 34095 Montpellier cedex, France, Laboratoire des Colloïdes, Verres et Nanomatériaux (LCVN), UMR 5587 CNRS, University of Montpellier II, F-34095 Montpellier, France, The ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom, and LENS and INFM, Via Nello Carrara 1,
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55
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McCart A, Haines J, Suraweera N, Tomlinson I, Silver A. Characterisation of an intestinal neoplasm modifier locus in Apc Min mice. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)71321-1] [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: 11/24/2022] Open
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56
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Barcellos LF, Ramsay PP, Caillier SJ, Sawcer S, Haines J, Schmidt S, Pericak-Vance M, Compston DAS, Gabatto P, Hauser SL, Oksenberg JR. Genetic variation in nitric oxide synthase 2A (NOS2A) and risk for multiple sclerosis. Genes Immun 2008; 9:493-500. [PMID: 18580885 DOI: 10.1038/gene.2008.41] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Multiple sclerosis (MS) is a chronic inflammatory disorder of the central nervous system with a strong genetic component. Variation in the major histocompatibility complex on chromosome 6p21, specifically the HLA-DRB1*15 haplotype, is the strongest genetic factor for MS, yet it is estimated to account for only a portion of risk for the disease. Previous evidence has implicated the nitric oxide synthase gene (NOS2A) encoding inducible NOS on chromosome 17q11 as a potential MS susceptibility gene. To determine whether variation in the NOS2A gene contributes to MS risk, we investigated a total of 50 polymorphisms within or flanking the locus for evidence of association using a comprehensive analytical strategy. A total of 6265 members from 1858 well-characterized MS families were utilized. No evidence for overtransmission of any individual single-nucleotide polymorphism allele or haplotype to the MS-affected individuals was observed. Furthermore, different transmission rates were not observed in either DRB1*15-positive or DRB1*15-negative family subgroups, or when extreme clinical outcomes characterizing disease progression were examined. The very largest study of NOS2A variation in MS, to date, excludes even a modest role for this locus in susceptibility.
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Affiliation(s)
- L F Barcellos
- Division of Epidemiology, School of Public Health, University of California, Berkeley, CA 94720-7356, USA.
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57
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Cambon O, Haines J, Keen DA, Tucker MG, Chapon L. Structural disorder in the Al (1−x)Ga xPO 4solid solution at high temperature. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307098807] [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: 11/10/2022] Open
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59
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Hansen NK, Allé P, Fertey P, Cambon O, Haines J. Structural effects of electric fields – AlPO 4and other piezoelectric α-quartz isotypes. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307098820] [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: 11/10/2022] Open
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60
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Haines J, Cambon O, Le Parc R, Levelut C, Pereira AS. Pressure-induced phase transitions in phosphate-like α-quartz-type solid solutions. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307099308] [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: 11/10/2022] Open
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61
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Suraweera N, Haines J, McCart A, Rogers P, Latchford A, Coster M, Polanco-Echeverry G, Guenther T, Wang J, Sieber O, Tomlinson I, Silver A. Genetic determinants modulate susceptibility to pregnancy-associated tumourigenesis in a recombinant line of Min mice. Hum Mol Genet 2006; 15:3429-35. [PMID: 17062636 DOI: 10.1093/hmg/ddl419] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Min mice provide a good model of human familial adenomatous polyposis. Recently, we have reported on two recombinant inbred lines (I and V) and the location of a modifier (Mom3) close to Apc, which altered polyp numbers in our mice possibly by modifying the frequency of wild-type (WT) allele loss at Apc; mice with severe disease (line V) showed elevated rates of loss. We now show that in line I only, a single pregnancy caused a significant increase in adenoma multiplicity compared with virgin controls (P<0.001) and that an additional pregnancy conferred a similar risk. Pregnancy was linked to both adenoma initiation and enhanced tumour growth in line I mice, and interline crosses indicated that susceptibility to pregnancy-associated adenomas was under genetic control. We found no evidence for the involvement of oestrodial metabolizing genes or the oestrogen receptors (Esr1 and 2) in tumour multiplicity. Importantly, a significantly elevated frequency of WT allele loss at Apc was observed in adenomas from parous mice (line and backcrossed) carrying the line I Min allele relative to equivalent virgin controls (P=0.015). Our results provide the first experimental evidence for genetic determinants controlling pregnancy-associated tumourigenesis; analogous genetic factors may exist in humans.
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Affiliation(s)
- N Suraweera
- ICMS, Barts and The London Queen Mary's School of Medicine and Dentistry, and Cancer Research UK Colorectal Cancer Unit and Academic Department of Pathology, St Mark's Hospital, Harrow, Middx, UK
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62
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Fraysse G, Haines J, Bornand V, Pintard M, Papet P, Hull S. Low-symmetry structures in the Zr-rich side of the pressure-temperature-composition phase diagram of Pb(Zr 1−xTi x)O 3. Acta Crystallogr A 2006. [DOI: 10.1107/s0108767306094864] [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: 11/10/2022] Open
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63
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Kolobov AV, Haines J, Pradel A, Ribes M, Fons P, Tominaga J, Katayama Y, Hammouda T, Uruga T. Pressure-induced site-selective disordering of Ge2Sb2Te5: a new insight into phase-change optical recording. Phys Rev Lett 2006; 97:035701. [PMID: 16907512 DOI: 10.1103/physrevlett.97.035701] [Citation(s) in RCA: 13] [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: 02/09/2006] [Indexed: 05/11/2023]
Abstract
We demonstrate that , the material of choice in phase-change optical recording (such as DVD-RAM), can be rendered amorphous by the application of hydrostatic pressure. It is argued that this structural change is due to a very strong second-nearest-neighbor Te-Te interaction that determines the long-range order in the metastable cubic phase of and also to the presence of vacancies. This newly discovered phenomenon suggests that pressure is an important factor for the formation of the amorphous phase which opens new insight into the mechanism of phase-change optical recording.
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Affiliation(s)
- A V Kolobov
- Center for Applied Near-Field Optics Research (CanFor), National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba 305-8562, Japan
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64
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Yan J, Siddique N, Slifer S, Bigio E, Mao H, Chen W, Liu E, Shi Y, Khan S, Haines J, Pericak-Vance M, Siddique T. A Major Novel Locus for ALS/FTD on Chromosome 9p21 and its Pathological Correlates: S61.006. Neurology 2006. [DOI: 10.1212/01.wnl.0000234887.27166.69] [Citation(s) in RCA: 4] [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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65
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Angot E, Parc RL, Levelut C, Beaurain M, Armand P, Cambon O, Haines J. A high-temperature Raman scattering study of the phase transitions in GaPO(4) and in the AlPO(4)-GaPO(4) system. J Phys Condens Matter 2006; 18:4315-4327. [PMID: 21690784 DOI: 10.1088/0953-8984/18/17/018] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Al(1-x)Ga(x)PO(4) solid solutions (x = 0.2, 0.3, 0.38, 0.7) and the pure AlPO(4) (x = 0) and GaPO(4) (x = 1) end members with the α-quartz-type structure were studied by Raman scattering. An investigation as a function of composition enabled the various modes to be assigned, in particular coupled and decoupled vibrations. The tetrahedral tilting modes, which have been linked to high-temperature phase transitions to β-quartz-type forms, were found to be decoupled. In addition, it is shown that Raman spectroscopy is a powerful technique for determining the gallium content of these solid solutions. Single crystals with x = 0.2, 0.38, and 1.0 (GaPO(4)) were investigated at high temperature. The composition Al(0.8)Ga(0.2)PO(4) was found to exhibit sequential transitions upon heating to the β-quartz and β-cristobalite forms at close to 993 K and 1073 K, respectively. Direct α-quartz-β-cristobalite transitions were observed for the two other compositions at close to 1083 K and 1253 K, respectively, upon heating. The spectra of the β-quartz and β-cristobalite forms indicate the presence of significant disorder. Back transformation to the α-quartz-type form occurred readily with a hysteresis of less than 100 K for the composition x = 0.38 and for pure GaPO(4). Rapid cooling was necessary to obtain the metastable α-cristobalite form. In contrast, for Al(0.80)Ga(0.20)PO(4), the α-cristobalite form was obtained even upon slow cooling.
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Affiliation(s)
- E Angot
- Laboratoire des Colloïdes, des Verres et des Nanomatériaux, UMR CNRS 5587, Université Montpellier II, cc026, Place E Bataillon, F-34095 Montpellier Cedex 5, France. Laboratoire de Physicochimie de la Matière Condensée, UMR CNRS 5617, Université Montpellier II, cc003, Place E Bataillon, F-34095 Montpellier Cedex 5, France
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66
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Haines J, Cambon O, Keen DA. High-temperature structural disorder in α-quartz-type piezoelectric materials. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305085338] [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: 11/11/2022] Open
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67
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Haines J. Retrospective on nursing. CMAJ 2005. [DOI: 10.1503/cmaj.050856] [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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68
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69
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Rouquette J, Haines J, Bornand V, Pintard M, Papet P, Marshall WG, Hull S. Pressure–temperature neutron diffraction studies of PbZr 0.52Ti 0.48O 3(PZT) system: polarisation rotation mechanism involving low symmetry phases. Acta Crystallogr A 2004. [DOI: 10.1107/s0108767304098277] [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: 11/10/2022] Open
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70
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Haines J, Chateau C, Léger JM, Bogicevic C, Hull S, Klug DD, Tse JS. Collapsing cristobalitelike structures in silica analogues at high pressure. Phys Rev Lett 2003; 91:015503. [PMID: 12906548 DOI: 10.1103/physrevlett.91.015503] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2002] [Indexed: 05/24/2023]
Abstract
The cristobalitelike forms of the ternary silica analogues BPO4 and BAsO4 were investigated at high pressure by x-ray diffraction and theoretical methods. The behavior of these compounds represents an extreme case in which the tilt angle of the constituent tetrahedra increases in a spectacular way at high pressure resulting in a major change in topology from a cristobalitelike framework towards a "collapsed cristobalite" structure. These compounds provide the first examples of the collapse of a framework structure to a close-packed form in a continuous manner without an intervening phase transition.
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Affiliation(s)
- J Haines
- Laboratoire de Physico-Chimie de la Matière Condensée, UMR CNRS 5617, Université Montpellier II, cc 003, Place E. Bataillon, 34095 Montpellier Cedex 5, France
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Abstract
We describe a case of pulmonary oedema occurring at 37 weeks gestation, following the attempted removal of a cervical suture under general anaesthesia. The use of an ultrasound technique to demonstrate the patient's fluid status is described. Signs of amniotic fluid embolism and how it exerts its influence on the circulation are discussed.
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Affiliation(s)
- J Haines
- Department of Anaesthesia, Liverpool Women's Hospital, Crown Street, Liverpool L8 7SS, UK.
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72
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Haines J, Rouquette J, Bornand V, Pintard M, Papet P, Astier R, Leger JM, Gorelli F. Transition to a relaxor-like phase in lead zirconate titanate (PZT) at high pressure. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302092073] [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: 11/10/2022] Open
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73
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Abstract
alpha-quartz, which has been reported to undergo pressure-induced amorphization, was found to transform to a monoclinic, crystalline phase when compressed to 45 GPa at room temperature in a close to hydrostatic, helium pressure medium. The x-ray powder diffraction data obtained could be indexed based on a monoclinic cell, and the intensities are in agreement with a P2(1)/c model structure built up of 3x2 zigzag chains of SiO6 octahedra. This new polymorph of silica, which is metastable under ambient conditions, has been isolated for the first time and is one of several possible competing dense forms containing octahedrally coordinated silicon.
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Affiliation(s)
- J Haines
- Laboratoire de Physico-Chimie de la Matière Condensée, UMR CNRS 5617, Université Montpellier II Sciences et Techniques du Languedoc, cc 003, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
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Abstract
The Heart Transplant Mentor Programme (HTMP) was initiated to augment patient care by providing patients and families with information and support from a peer perspective. We assessed program effectiveness with a pilot study of semi-structured interviews of 63% (10/16) of the mentored patients and an open-ended inquiry that rated the program on a 5-point scale (1, poor, to 5, excellent) and that selected descriptors of the program. Qualitative and quantitative analyses indicated that participants found the information and support provided by their mentors positive (3.8 and 4.0, respectively), discussion focused on medical rather than psychosocial topics, pre-transplant dissatisfaction with the program was caused by late or little mentor contact, and post-transplant dissatisfaction was attributed to difference in clinical course between mentor and patient. Although findings indicate that HTMP augments patient care, recommendations to increase patient satisfaction include earlier introduction of a mentor and individualizing mentors according to demographics and clinical course.
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Affiliation(s)
- L Wright
- Multi Organ Transplant Programme, Toronto General Hospital, University Health Network, Toronto, Ontario, Canada.
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75
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Bradford Y, Haines J, Hutcheson H, Gardiner M, Braun T, Sheffield V, Cassavant T, Huang W, Wang K, Vieland V, Folstein S, Santangelo S, Piven J. Incorporating language phenotypes strengthens evidence of linkage to autism. Am J Med Genet 2001; 105:539-47. [PMID: 11496372] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
We investigated the effect of incorporating information about proband and parental structural language phenotypes into linkage analyses in the two regions for which we found the highest signals in our first-stage affected sibling pair genome screen: chromosomes 13q and 7q. We were particularly interested in following up on our chromosome 7q finding in light of two prior reports of linkage of this region to developmental language disorder, since one of the diagnostic criteria for autism is absent or abnormal language development. We hypothesized that if the language phenotype were genetically relevant to linkage at the chromosome 7q locus, then incorporating parents phenotypes would increase the signal at that locus, and most of the signal would originate from the subset of families in which both probands had severe language delay. The results support these hypotheses. The linkage signals we obtained on chromosome 7q as well as at least one signal on chromosome 13q are mainly attributable to the subgroup of families in which both probands had language delay. This became apparent only when the parents' history of language-related difficulties was also incorporated into the analyses. Although based on our data, we were not able to distinguish between epistasis or heterogeneity models, we tentatively concluded that there may be more than one autism susceptibility locus related to language development.
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Affiliation(s)
- Y Bradford
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, Tennessee, USA
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Meijne E, Huiskamp R, Haines J, Moody J, Finnon R, Wilding J, Spanjer S, Bouffler S, Edwards A, Cox R, Silver A. Analysis of loss of heterozygosity in lymphoma and leukaemia arising in F1 hybrid mice locates a common region of chromosome 4 loss. Genes Chromosomes Cancer 2001; 31:373-81. [PMID: 11433528 DOI: 10.1002/gcc.1156] [Citation(s) in RCA: 8] [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: 11/07/2022] Open
Abstract
Previous studies have identified five lymphoma-related tumour suppressor gene regions on murine chromosome 4. Using detailed allelotype analysis on a range of lympho-haematopoietic tumour types arising in F1 hybrid mice, we now show a consistent pattern of loss of heterozygosity (LOH) which identifies a common region of loss delineated by microsatellites D4Mit21 and D4Mit53 on proximal chromosome 4. This critical segment corresponds to the thymic lymphoma tumour suppressor region 5 (TLSR5) identified in an earlier study. Tumours of this type have also been reported as showing allelic loss from the Trp53 and Ikaros regions on chromosome 11. In the present study, only a small fraction of tumours showed LOH in the Ikaros region, while a minority of lymphomas, but not acute myeloid leukaemias, showed allelic loss of the chromosome 11 segment encoding Trp53. These and other data indicate strongly that the genomic regions identified as showing recurrent LOH depend on the genetic background of the mice. Overall, the results indicate a key role for a tumour suppressor gene(s) encoded in an approximately 3 cM segment on proximal chromosome 4 and provide an experimental basis for the further investigation of the functional role of candidate genes which include Pax5 and Tgfbr1.
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Affiliation(s)
- E Meijne
- Nuclear Research and Consultancy Group (NRG), Petten, The Netherlands
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77
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Haines J, Barclay P, Wauchob T. Optimising management of delirium. Withdrawal of Droleptan (droperidol). BMJ 2001; 322:1603. [PMID: 11458902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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78
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Abstract
Molecular imprinting technology (MIT) is a technique for generating polymers bearing biomimetic receptors. It offers several advantages to the agrofood industry in areas such as analysis, sensoring, extraction, or preconcentration of components. It has the potential of becoming a tool for acquiring truly simple, rapid, and robust direct measurements. In this review, the special features of MIT that have bearing on food science and technology are highlighted.
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Affiliation(s)
- O Ramström
- Pure and Applied Biochemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00, Lund, Sweden.
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79
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Abstract
Mutations in the cytoplasmic Cu/Zn superoxide dismutase (SOD1) gene on human chromosome 21q22.1 cause 10-20% of familial amyotrophic lateral sclerosis (ALS) cases. The expression of the ALS phenotype in mice carrying the murine G86R SOD1 mutation is highly dependent upon the mouse genetic background. This is similar to the phenotypic variation observed in ALS patients containing identical SOD1 mutations. In the FVB/N background, mice expressing mG86R SOD1 develop an ALS phenotype at approximately 100 days. However, when these mice were bred into a mixed background of C57Bl6/129Sv, the onset of the ALS phenotype was delayed (143 days to >2 years). Using 129 polymorphic autosomal markers in a whole genome scan, we have identified a major genetic modifier locus with a maximum lod score of 5.07 on mouse chromosome 13 between D13mit36 and D13mit76. This 5- to 8-cM interval contains the spinal muscular atrophy (SMA)-associated gene Smn (survival motor neuron) and seven copies of Naip (neuronal apoptosis inhibitory protein), suggesting a potential link between SMA and ALS.
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Affiliation(s)
- C B Kunst
- Eleanor Roosevelt Institute, 1899 Gaylord Street, Denver, Colorado 80206, USA.
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80
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Jobic S, Brec R, Chateau C, Haines J, Léger JM, Koo HJ, Whangbo MH. Synthesis and crystal structure determination of a new pressure-induced iridium ditelluride phase, m-IrTe2, and comparison of the crystal structures and relative stabilities of various IrTe2 polymorphs. Inorg Chem 2000; 39:4370-3. [PMID: 11196934 DOI: 10.1021/ic000351e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The new monoclinic IrTe2 phase m-IrTe2 was synthesized under pressure, and its structure was determined by X-ray powder diffraction. The relative stabilities of the three known and three hypothetical IrTe2 polymorphs were discussed on the basis of tight binding electronic band structure calculations. m-IrTe2 exhibits structural features of both CdI2- and pyrite-type IrTe2 phases and is expected to be nearly as stable as that of the CdI2-type IrTe2. The hypothetical IrS2- and ramsdellite-type IrTe2 phases are predicted to be more stable than the CdI2-type IrTe2.
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Affiliation(s)
- S Jobic
- Institut des Matériaux Jean Rouxel, 2 rue de la Houssinière, BP 32229, 44322 Nantes, France
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81
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Haines J, Léger JM, Gorelli F, Klug DD, Tse JS, Li ZQ. X-ray Diffraction and Theoretical Studies of the High-Pressure Behavior of Magnesium Fluoride. Acta Crystallogr A 2000. [DOI: 10.1107/s0108767300024739] [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: 11/11/2022] Open
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82
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Haines J, Dunford R, Moody J, Ellender M, Cox R, Silver A. Loss of heterozygosity in spontaneous and X-ray-induced intestinal tumors arising in F1 hybrid min mice: evidence for sequential loss of APC(+) and Dpc4 in tumor development. Genes Chromosomes Cancer 2000; 28:387-94. [PMID: 10862047 DOI: 10.1002/1098-2264(200008)28:4<387::aid-gcc4>3.0.co;2-h] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Min (multiple intestinal neoplasia) mice carry a mutant allele of the murine Apc (adenomatous polyposis coli) locus and are predisposed to intestinal adenoma formation in the intestinal tract. Early studies have shown complete loss of function of Apc by whole chromosome loss on the tumor-sensitive C57BL/6J genetic background and in AKR x B6 F1 hybrids. Gamma-radiation-induced chromosomal losses focus the critical region on wt Apc, but because of the limited number of polymorphic markers used, no other critical regions of loss on chromosome 18 were identified. Using intestinal tumors arising spontaneously and induced by X-rays in CBA/H x C57BL/6J F1 hybrid mice and high-resolution microsatellite loss of heterozygosity (LOH) techniques, we provide mapping data for wt Apc loss, which confirms and extends earlier observations. In addition, high-frequency loss events at the Dpc4 locus were found in both spontaneous and radiation-induced tumors. These data identified LOH of Dpc4 as a critical secondary event following complete functional loss of Apc. LOH across the Trp53 genomic region of chromosome 11 was not observed. No LOH was recorded for the Mom1 candidate gene Pla2g2a or for 9 out of 10 polymorphic markers from the Mom1 genomic region on murine chromosome 4. One marker mapping distal to Pla2g2a showed LOH in a small minority of spontaneous tumors. These data support the contention that Mom1 does not act as a classical tumor suppressor. Overall, our data indicates a significant role for Dpc4 mutation in intestinal tumor progression in the mouse and provides further evidence for the importance of interstitial chromosome losses in radiation tumorigenesis.
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MESH Headings
- Animals
- Crosses, Genetic
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/radiation effects
- Gamma Rays
- Genes, APC/genetics
- Genes, APC/radiation effects
- Genes, p53/genetics
- Genes, p53/radiation effects
- Intestinal Neoplasms/genetics
- Life Expectancy
- Loss of Heterozygosity/genetics
- Loss of Heterozygosity/radiation effects
- Mice
- Mice, Inbred AKR
- Mice, Inbred C57BL
- Mice, Inbred CBA
- Mice, Mutant Strains
- Microsatellite Repeats
- Neoplasms, Radiation-Induced/genetics
- Signal Transduction/genetics
- Signal Transduction/radiation effects
- Smad4 Protein
- Trans-Activators/genetics
- Trans-Activators/radiation effects
- X-Rays
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Affiliation(s)
- J Haines
- Radiation Effects Department, National Radiological Protection Board, Chilton, Oxfordshire, England
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83
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84
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Haines J. Stopping Bill 11. Can Nurse 2000; 96:3. [PMID: 11143651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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85
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Haines J. Nursing's brain drain. Can Nurse 2000; 96:3. [PMID: 11143659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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86
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Haines J. Revisiting HIV/AIDS. Can Nurse 2000; 96:3. [PMID: 11188574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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87
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Haines J. Testing the will to live. Can Nurse 1999; 95:3. [PMID: 11140038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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88
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Haines J. Stepping online. Can Nurse 1999; 95:3. [PMID: 11141610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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89
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Haines J. Toward another country. Can Nurse 1999; 95:3. [PMID: 10639967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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90
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Haines J. A journey through mental illness. Can Nurse 1999; 95:3. [PMID: 10418359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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91
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Abstract
OBJECTIVE To investigate the psychophysiological pattern associated with severe and mild onychophagia, and to compare this pattern with that demonstrated by previous research on self-cutting. METHOD Comparisons between the psychophysiological responses accompanying 3 behaviours were made using a guided imagery methodology. Imagery of nail-related, skin-cutting, and neutral events were presented in 4 stages. RESULTS Experiment I distinguished participants exhibiting severe and mild onychophagia by the severity and frequency of nail-biting and by the pattern of psychophysiological response across the stages. Experiment II indicated that the change in psychophysiological arousal accompanying severe onychophagia was not as dramatic as that demonstrated for skin-cutting. The behaviour seems to be less effective in reducing tension. CONCLUSION Severe onychophagia appears to manage the level of tension experienced by an individual, instead of dramatically reducing it in times of crisis. Such a process is consistent with that demonstrated in individuals with obsessive-compulsive disorder.
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Affiliation(s)
- J H Wells
- Department of Psychology, University of Tasmania, Hobart, Australia
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92
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Haines J. Giving human rights a helping hand. Can Nurse 1998; 94:3. [PMID: 10025276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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93
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Haines J. Drawing new blood into nursing. Can Nurse 1998; 94:3. [PMID: 9782831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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94
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Abstract
OBJECTIVES The aim of this review is to make a distinction between a mild and a severe form of onychophagia (nailbiting) that has not been adequately recognised in clinical research. Furthermore, the aim is to emphasise the need for greater understanding of the motivation for such self-injury as occurs in the severe form. The purpose of making the distinction is to evaluate whether a label of self-mutilation can be applied to the severe form. If this is the case, the tension-reduction model of self-mutilation can be proposed as the mechanism which may maintain the behaviour in the face of serious social and physical consequences. METHOD Examination was made of the literature relating to onychophagia and to self-mutilation. Treatment studies of onychophagia were examined to evaluate the mechanisms by which the behaviour may be maintained. RESULTS Considering the self-mutilative nature of the severe form and the common theme of tension reduction in the literature on onychophagia, application of the tension-reduction model of self-mutilation is warranted. CONCLUSION There is a need for empirical research as to the tension-reducing nature of severe onychophagia.
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Affiliation(s)
- J H Wells
- Department of Psychology, University of Tasmania, Hobart, Australia
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95
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Haines J. Attracting and keeping nurses. Can Nurse 1998; 94:3. [PMID: 9633312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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96
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Haines J. Nurses in the media. Can Nurse 1998; 94:3. [PMID: 9573890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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97
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Haines J. From loss to action. Can Nurse 1998; 94:3. [PMID: 9555313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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98
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99
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Haines J, Léger JM, Schulte O, Hull S. Neutron Diffraction Study of the Ambient-Pressure, Rutile-Type and the High-Pressure, CaCl2-Type Phases of Ruthenium Dioxide. Acta Crystallogr B Struct Sci 1997. [DOI: 10.1107/s0108768197008094] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The structures of the ambient-pressure, rutile-type and the high-pressure, CaCl2-type phases of RuO2 were refined by time-of-flight neutron powder diffraction. Refinement of the data obtained from the ambient-pressure phase (P42/mnm, Z = 2) yielded cell constants a = 4.49307 (7) and c = 3.10639 (7) Å and an oxygen positional parameter x = 0.3056 (1). The principal axes of the displacement ellipsoids of the oxygen ions lie along the directions which correspond to the normal coordinate of the B
1g soft mode that drives the transition to the CaCl2-type structure. The CaCl2-type phase (Pnnm, Z = 2) was refined in situ at 5.3 (3) GPa and the following cell constants and oxygen positional parameters were obtained: a = 4.4865 (5), b = 4.4347 (5), c = 3.0934 (3) Å, x = 0.3101 (5) and y = 0.3005 (5). In the CaCl2-type phase at 5.3 (3) GPa the RuO6 octahedra are rotated by 1.1 (2)° with respect to their orientation in the ruffle-type phase. There is little change in the internal angles of the octahedron between 0.1 MPa and 5.3 GPa. Compression of the octahedron is anisotropic with a much greater reduction of the Ru—O contacts in the ab plane.
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100
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Haines J. Questions from an inquest. Can Nurse 1997; 93:3. [PMID: 9444142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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