76
|
Fayet G, Joubert L, Rotureau P, Adamo C. A Theoretical Study of the Decomposition Mechanisms in Substituted o-Nitrotoluenes. J Phys Chem A 2009; 113:13621-7. [DOI: 10.1021/jp905979w] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
77
|
Tognetti V, Joubert L, Cortona P, Adamo C. Toward a Combined DFT/QTAIM Description of Agostic Bonds: The Critical Case of a Nb(III) Complex. J Phys Chem A 2009; 113:12322-7. [DOI: 10.1021/jp9045534] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
78
|
Joubert J, Reid C, Barton D, Cumming T, McLean A, Joubert L, Barlow J, Ames D, Davis S. Integrated care improves risk-factor modification after stroke: initial results of the Integrated Care for the Reduction of Secondary Stroke model. J Neurol Neurosurg Psychiatry 2009; 80:279-84. [PMID: 19010943 DOI: 10.1136/jnnp.2008.148122] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE Despite evidence demonstrating that risk-factor management is effective in reducing recurrent cerebrovascular disease, there are very few structured care programmes for stroke survivors. The aim was to implement and evaluate an integrated care programme in stroke. METHODS 186 patients with stroke were randomised to either the treatment (integrated care) or control (usual care) group and were followed up over 12 months. The Integrated Care for the Reduction of Secondary Stroke (ICARUSS) model of integrated care involved collaboration between a specialist stroke service, a hospital coordinator and a patient's general practitioner. The primary aim was to promote the management of vascular risk factors through ongoing patient contact and education. RESULTS In the 12 months poststroke, systolic blood pressure (sBP) decreased in the treatment group but increased in controls. The group difference was significant, and remained so when age, sex, disability and sBP at discharge were accounted for (p = 0.04). Treatment patients also exhibited better modification of body mass index (p = 0.007) and number of walks taken (p<0.001) than controls. Rankin scores indicated significantly reduced disability in treatment patients relative to controls in the year poststroke (p = 0.003). CONCLUSIONS Through an integrated system of education, advice and support to both patient and GP, the ICARUSS model was effective in modifying a variety of vascular risk factors and therefore should decrease the likelihood or recurrent stroke or vascular event.
Collapse
|
79
|
Fayet G, Joubert L, Rotureau P, Adamo C. On the use of descriptors arising from the conceptual density functional theory for the prediction of chemicals explosibility. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2008.11.033] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
80
|
Sims J, Galea M, Taylor N, Dodd K, Jespersen S, Joubert L, Joubert J. Regenerate: assessing the feasibility of a strength-training program to enhance the physical and mental health of chronic post stroke patients with depression. Int J Geriatr Psychiatry 2009; 24:76-83. [PMID: 18613281 DOI: 10.1002/gps.2082] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
OBJECTIVE The Regenerate pilot study explored whether a 10-week, community-based progressive resistance training (PRT) program could reduce depressive symptoms in depressed chronic stroke survivors. METHODS Participants were screened for depressive status using the PHQ-9 and confirmed by psychiatric assessment. Eligible people (n = 45) were randomised to PRT or a waiting-list comparison group. The PRT program included two high intensity sessions/week for 10 weeks at a community-based gymnasium. Depressive status, physical and mental health and quality of life were measured at baseline, 10 weeks and 6 months. Muscle strength was assessed using 1 repetition maximum (1-RM) for upper and lower limbs. RESULTS The participants' median age was 69 years: 27 were male. The intervention group had lower depression scores than the comparison group at all time points. At 6-month follow-up, there was a trend for PRT participants to be more likely to be no longer depressed than the comparison group, but the difference was not significant after adjusting for baseline scores. There were modest improvements in health and wellbeing over time, but many scores were lower than reported in non-depressed people. Intervention participants demonstrated significant improvements in strength. Program adherence was good: on average 75% of the 10-week program was completed. CONCLUSIONS The intervention appeared to be feasible within a community-based setting. To optimize stroke recovery and improve the quality of life of stroke survivors, health professionals should continue to focus on helping survivors' mental health recovery as well their physical rehabilitation.
Collapse
|
81
|
Boulet B, Joubert L, Cote G, Bouvier-Capely C, Cossonnet C, Adamo C. Theoretical Study of the Uranyl Complexation by Hydroxamic and Carboxylic Acid Groups. Inorg Chem 2008; 47:7983-91. [DOI: 10.1021/ic7018633] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
82
|
Petit L, Joubert L, Tranchant I, Herscovici J, Adamo C. A theoretical investigation on the interaction of a new gene vector with DNA. Theor Chem Acc 2008. [DOI: 10.1007/s00214-008-0426-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
83
|
Fayet G, Joubert L, Rotureau P, Adamo C. Theoretical Study of the Decomposition Reactions in Substituted Nitrobenzenes. J Phys Chem A 2008; 112:4054-9. [DOI: 10.1021/jp800043x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
84
|
Sutherland S, Wilson J, Joubert L. 338 The theory and practice of childhood attachment and family systems for disease outcomes and service utilisation in adult cystic fibrosis patients. Research findings from a mixed methodological study. J Cyst Fibros 2007. [DOI: 10.1016/s1569-1993(07)60311-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
85
|
Barnes R, Birch J, Cloete MM, Joubert L, Usher AC, Nel MM. The incidence of work-related low back pain among currently practicing physiotherapists in Bloemfontein. SOUTH AFRICAN JOURNAL OF PHYSIOTHERAPY 2007. [DOI: 10.4102/sajp.v63i1.117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Physiotherapy practice involves the performance of strenuous physical activities related to the delivery of patient rehabilitation. No evidence of studies relating to physiotherapy work-related low back pain (WRLBP) in South Africa could be found. The aims of this study were to retrospectively investigate the incidence of work related low back pain among currently practicing physiotherapists in Bloemfontein, to determine the contributing risk factors, and to determine the responses of the physiotherapists to injury. Eighty four physiotherapists participated in this descriptive study. The results indicated that 67% of respondents had experienced work related low back pain and the 95% confidence interval for the incidence of WRLBP among physiotherapists in Bloemfontein is [56.8%; 76.6%]. Therapists performing cardio-thoracic related tasks had the most significant confidence interval of WRLBP [2.2%; 35.1%]. Fifty eight percent of respondents who had WRLBP reported that their symptoms were exacerbated by clinical practice. The results of the study suggest that it is the nature of the job design which predisposes physiotherapists to injury and not a lack of kinetic handling knowledge. Further research is needed to develop methods to reduce the risks of WRLBP which are inherently part of physio-therapy practice.
Collapse
|
86
|
Joubert L, Pavone M, Barone V, Adamo C. Comparative Static and Dynamic Study of a Prototype SN2 Reaction. J Chem Theory Comput 2006; 2:1220-7. [DOI: 10.1021/ct0600159] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
87
|
Boulet B, Joubert L, Cote G, Bouvier-Capely C, Cossonnet C, Adamo C. A Combined Experimental and Theoretical Study on the Conformational Behavior of a Calix[6]arene. J Phys Chem A 2006; 110:5782-91. [PMID: 16640372 DOI: 10.1021/jp0565305] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An experimental and theoretical study on the conformational behavior of the 1,3,5-OMe-2,4,6-OCH(2)CONHOH-p-tert-butylcalix[6]arene has been carried out. In particular, semiempirical (AM1) and density functional theory (DFT) calculations have been performed in order to identify the possible conformers. The obtained results show that the cone structure is the most stable conformer at any level of theory, even if significant differences have been obtained for the other species. The inclusion of solvent effect, through a continuum model, also points out the relevant role played by the solvent in the stabilization of the cone structure in solution. These latter results have been confirmed by NMR experiments, which clearly show the presence of only the cone conformer in a polar solvent, such as DMSO. Finally, (1)H and (13)C NMR spectra on model systems, i.e., two successive phenol rings (Ar(1)-CH(2)-Ar(2)), have been computed at the DFT level and compared with the experimental spectra of the complete molecule. The results show an overall good agreement with the experimental data, thus leading to an unambiguous assignment of the experimental spectra.
Collapse
|
88
|
Gutiérrez-Oliva S, Joubert L, Adamo C, Bulat FA, Zagal JH, Toro-Labbé A. Bridging the Gap between the Topological and Orbital Description of Hydrogen Bonding: The Case of the Formic Acid Dimer and Its Sulfur Derivatives. J Phys Chem A 2006; 110:5102-7. [PMID: 16610831 DOI: 10.1021/jp057139m] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Several molecular descriptors, based on topological approaches as well as on a more traditional orbital-based decomposition, have been used to asses relations with hydrogen bond strengths in a series of formic acid dimers and its sulfur derivatives. Particular attention has been devoted to the analysis of the core-valence bifurcation topological index and to the bond order index. Their values are seen to be linearly related to bond energies estimated through a bond-energy-bond-order relationship; also, the mean value of the topological index appears to be related to the complexation energy computed by methods based on density functional theory. The dependence of the index upon the donor-acceptor couple in relation to its applicability is discussed.
Collapse
|
89
|
Petit L, Joubert L, Maldivi P, Adamo C. A Comprehensive Theoretical View of the Bonding in Actinide Molecular Complexes. J Am Chem Soc 2006; 128:2190-1. [PMID: 16478154 DOI: 10.1021/ja056908c] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
While usual atomic population methods give a consistent view of trivalent lanthanide or a uranium-ligand bond, the description of the bonding of americium(III), which is a key element for nuclear fuel processes, is a challenge. Neither experimental data nor theoretical calculations have been able so far to evidence covalency effects in the americium-ligand bond. We show herein that the use of more sophisticated methods based on a topological approach (AIM and ELF) gives a consistent view of such an interaction for the first time, showing a weak covalent back-bonding interaction with the CO ligand.
Collapse
|
90
|
Joubert L, Adamo C. Static and dynamic descriptions of bond breaking/formation: A complementary view? J Chem Phys 2005; 123:211103. [PMID: 16356030 DOI: 10.1063/1.2133728] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Ab initio molecular-dynamic simulations using density-functional theory and the recent atom-centered density-matrix propagation (ADMP) method were used to study the bond breaking and formation for a case-study substitution nucleophilic bimolecular reaction, namely, the Walden inversion. Using the atoms-in-molecule approach, we have performed a detailed analysis to investigate intra- and intermolecular charge transfer along the ADMP trajectory. These results were compared to those obtained considering a static approach, such as the intrinsic reaction path. In particular, the topological properties computed along the dynamic trajectory well evidence a stronger electron exchange tending to spontaneously maximize the rising covalent interaction. Furthermore, their analysis suggests that the bond formation mechanism involves a reactive intermediate with a bonding interaction stronger than in the final product.
Collapse
|
91
|
Bockaert J, Roussignol G, Bécamel C, Gavarini S, Joubert L, Dumuis A, Fagni L, Marin P. GPCR-interacting proteins (GIPs): nature and functions. Biochem Soc Trans 2005; 32:851-5. [PMID: 15494032 DOI: 10.1042/bst0320851] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The simplistic idea that seven transmembrane receptors are single monomeric proteins that interact with heterotrimeric G-proteins after agonist binding is definitively out of date. Indeed, GPCRs (G-protein-coupled receptors) are part of multiprotein networks organized around scaffolding proteins. These GIPs (GPCR-interacting proteins) are either transmembrane or cytosolic proteins. Proteomic approaches can be used to get global pictures of these 'receptosomes'. This approach allowed us to identify direct but also indirect binding partners of serotonin receptors. GIPs are involved in a wide range of functions including control of the targeting, trafficking and signalling of GPCRs. One of them, Shank, which is a secondary and tertiary partner of metabotropic and ionotropic glutamate receptors, respectively, can induce the formation of a whole functional glutamate 'receptosome' and the structure to which it is associated, the dendritic spine.
Collapse
|
92
|
Du Plessis KR, Botha A, Joubert L, Bester R, Conradie WJ, Wolfaardt GM. Response of the microbial community to copper oxychloride in acidic sandy loam soil. J Appl Microbiol 2005; 98:901-9. [PMID: 15752337 DOI: 10.1111/j.1365-2672.2004.02537.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AIMS Determining the response of different microbial parameters to copper oxychloride in acidic sandy loam soil samples using cultivation-dependent and direct microscopic techniques. METHODS AND RESULTS Culturable microbial populations were monitored for 245 days in a series of soil microcosms spiked with different copper oxychloride concentrations. Microbial populations responded differently to additional Cu. Protistan numbers and soil metabolic potential decreased. Experiments with more soil samples revealed that metabolic potential was not significantly affected by < or =100 mg kg(-1) additional Cu. However, a negative impact on protista was noted in soil containing only 15 mg kg(-1) EDTA-extractable Cu. The negative impact on protistan numbers was less severe in soils with a higher phosphorous and zinc content. CONCLUSIONS Bacterial populations responded differently, and protista were most sensitive to elevated Cu levels. Protistan numbers in soil from uncultivated land were higher and seemed to be more sensitive to additional Cu than the numbers of these organisms in soil originating from cultivated land. SIGNIFICANCE AND IMPACT OF THE STUDY Protistan sensitivity to small increases in Cu levels demonstrates the vulnerability of the soil ecosystem to Cu perturbations, especially when the importance of protista as link in the flow of energy between trophic levels is considered.
Collapse
|
93
|
Joubert L, Guillemoles JF, Adamo C. A theoretical investigation of the dye-redox mediator interaction in dye-sensitized photovoltaic cells. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00257-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
94
|
Perrier A, Gourier D, Joubert L, Adamo C. Spin trapping by bis(benzene)chromium: A density functional study. Phys Chem Chem Phys 2003. [DOI: 10.1039/b212073a] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
95
|
Guillemoles JF, Barone V, Joubert L, Adamo C. A Theoretical Investigation of the Ground and Excited States of Selected Ru and Os Polypyridyl Molecular Dyes. J Phys Chem A 2002. [DOI: 10.1021/jp021517v] [Citation(s) in RCA: 159] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
96
|
Joubert L, Popelier PLA. The prediction of energies and geometries of hydrogen bonded DNA base-pairs via a topological electrostatic potentialElectronic supplementary information (ESI) available: Comparison of the BSSE corrected interaction energies, geometrical parameters and total interaction energies of the 27 base-pair series. See http://www.rsc.org/suppdata/cp/b2/b204485d/. Phys Chem Chem Phys 2002. [DOI: 10.1039/b204485d] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
97
|
Abstract
A systematic analysis of the electrostatic interaction between 27 natural DNA base pairs was carried out, based on ab initio correlated wave functions and the topology of the electron density. Using high rank multipole moments we show that the atomic partitioning of the interaction energy contains many substantial contributions between distant atoms. Profiles of cumulative energy versus internuclear distance show large fluctuations and provide an electrostatic fingerprint of the partitioning of interaction energy in a complex. A quantified comparison between each pair of energy profiles, one for each base pair, makes clear that there is no correlation between the total base pair interaction energy and the shape of the profile. In other words, base pairs with similar interaction energy are not stable for the same reasons in terms of atomic partitioning. In summary, simple rules to rationalize the pattern of energetic stability of naturally occurring base pairs in terms of subsets of atoms are elusive. Our work cautions against inappropriate use of Jorgensen's secondary interaction hypothesis.
Collapse
|
98
|
Joubert L, Maldivi P. A Structural and Vibrational Study of Uranium(III) Molecules by Density Functional Methods. J Phys Chem A 2001. [DOI: 10.1021/jp012301g] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
99
|
Popelier PLA, Joubert L, Kosov DS. Convergence of the Electrostatic Interaction Based on Topological Atoms. J Phys Chem A 2001. [DOI: 10.1021/jp011511q] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
100
|
Joubert L, Silvi B, Picard G. Topological approach in the structural and bonding characterization of lanthanide trihalide molecules. Theor Chem Acc 2000. [DOI: 10.1007/s002140000112] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|