69 research outputs found
Syndrome specific modules to enhance the Stepping Stones Triple P public health intervention (Corrigendum)
No full textBezzina, L. A., Rice, L. J., Howlin, P., Tonge, B. J., and Einfeld, S. L. (2017) Syndrome specific modules to enhance the Stepping Stones Triple P public health intervention. Journal of Intellectual Disability Research, 61: 836–842. doi: 10.1111/jir.12405.
In the article detailed above, the authors would like to advise readers that the MHYPEDD study group should appear in the author list and Acknowledgement section as below.
L. A. Bezzina, L. J. Rice, P. Howlin, B. J. Tonge, S. L. Einfeld & MHYPEDD Study Group*
*Authors' contributions:
LB, LR, PH, BT, SE participated in manuscript preparation. All authors have read and approved the content of the manuscript. The Mental Health of Young People with Developmental Disabilities ‘MHYPEDD’ study group provided assistance in developing the study protocols and the syndrome specific modules.
Acknowledgements:
The ‘MHYPEDD’ study group comprises of Matt Sanders, Kate Sofronoff, Kylie Gray, Caroline Keating, Sian Horstead, Rebecca Wilson, and Kristina Clarke.No Full Tex
Zederyke zinnebeelden der tonge /
No full textIncludes index of writers cited.Signatures: *⁸ *⁶ A-X⁸ ²A-F⁸ G².Frontispiece etched by Jacob Folkema after Arnold Houbraken. Forty in-text emblems etched by Jacobus Schijnvoet.The present 2nd ed. includes text by Arnold Houbraken, p. [3]-99 at end.First published Amsterdam, 1716. See Landwehr.Landwehr, J. Emblem and fable books (3rd ed.),Mode of access: Internet.Bookseller's labels of A. van Straden of Rotterdam, and J.L Beijers of Utrecht. Signature on 2nd front free endpaper (A. Neepmahd?).Binding: mottled calfskin, gilt tooled. Author & title on spine label in gilt
Mechanism and kinetics of dithiobenzoate-mediated RAFT polymerization. I. The current situation
No full textInvestigations into the kinetics and mechanism of dithiobenzoate-mediated Reversible Addition-Fragmentation Chain Transfer (RAFT) polymerizations, which exhibit nonideal kinetic behavior, such as induction periods and rate retardation, are comprehensively reviewed. The appreciable uncertainty in the rate coefficients associated with the RAFT equilibrium is discussed and methods for obtaining RAFT-specific rate coefficients are detailed. In addition, mechanistic studies are presented, which target the elucidation of the fundamental cause of rate retarding effects. The experimental and theoretical data existing in the literature are critically evaluated and apparent discrepancies between the results of different studies into the kinetics of RAFT polymerizations are discussed. Finally, recommendations for further work are given. (c) 2006 Wiley Periodicals, Inc
The role of non governmental organisations in fostering women's economic empowerment and development in Cameroon : the case study of the Mbonweh Women's Development Association
No full textIncludes bibliographical references (leaves 122-131)
Pulsed Laser Polymerization Study of the Propagation Kinetics of Acrylamide in Water
No full textPulsed laser polymerization was used in conjunction with aqueous-phase size exclusion chromatography with multi-angle laser light scattering detection to determine the propagation rate coefficient (k(p)) for the water-soluble monomer acrylamide. The influence of the monomer concentration was investigated from 0.3 to 2.8 M, and k(p) decreased with increasing monomer concentration. These data and data for acrylic acid in water were consistent with this decrease being caused by the depletion of the monomer concentration by dimer formation in water. Two photoinitiators, uranyl nitrate and 2,2'-azobis(2-amidinopropane) (V-50), were used; k(p) was dependent on their concentrations. The concentration dependence of k(p) was ascribed to a combination of solvent effects arising from association (thermodynamic effects) and changes in the free energy of activation (effects of the solvent on the structure of the reactant and transition state). Arrhenius parameters for k(p) (M-1 s(-1)) = 10(7.2) exp(-13.4 kJ mol(-1)/RT) and k(p) (M-1 s(-1)) = 10(7.1) exp(-12.9 kJ mol(-1)/RT) were obtained for 0.002 M uranyl nitrate and V-50, respectively, with a monomer concentration of 0.32 M. (c) 2005 Wiley Periodicals, Inc
E.s.r. measurements of the propagation rate coefficient for styrene free radical polymerisation
No full textElectron spin resonance (e.s.r.) spectroscopy should be useful for the measurement of propagation rate coefficients (k(p)) in free radical polymerisations, since the propagating radical concentration can be directly observed. However, in previous studies, k(p) values have generally been inconsistent, and disagreed with data from other accepted experimental techniques, such as pulsed laser polymerisation. This study shows that for styrene, consistency can be obtained, but only when experimental conditions are selected such that polymer of sufficiently high molecular weight is formed; otherwise incorrect rate constants may be measured. The measured Arrhenius parameters were in good agreement with IUPAC accepted data. The values at 343 K for both thermally and photochemically initiated experiments were found to be consistent, suggesting that photoinitiated systems may polymerise in the ground state. Some previously inconsistent data could be explained in terms of selection of experimental conditions. (C) 1998 Elsevier Science Ltd. All rights reserved
Service-Learning as a Practical Approach to Teaching Auditing
No full textBusiness pedagogy can be more effective for students and business through a hands-on, practical approach rather than traditional lectures. The Pathways Commission of the AICPA and AAA recommended we “develop curriculum models, engaging learning resources, and mechanisms for easily sharing them as well as enhancing faculty development opportunities in support of sustaining a robust curriculum” (American Accounting Association 2012 p. 12; Hawawini 2005). In this article, we present a method to teach auditing. We identify a few articles integrating service-learning opportunities into a business school environment (Tonge and Willett 2012; Govekar and Rishi 2007). Our student teams performed agreed-upon procedures at three small churches. Qualitative data from both students and church personnel support this pedagogy. We develop practical implications for upper-level undergraduate business courses
Electron paramagnetic resonance investigation of the nature of the propagating species in methyl methacrylate polymerization
No full textThe electron paramagnetic resonance (EPR) spectrum of methyl methacrylate polymerizing in a range of systems is simulated using a consistent set of parameters for two rotamers of a single free radical. The 9-line spectrum observed in bulk and emulsion polymerization was fitted by a superposition of two spectra corresponding to two rotamers of a long-chain species (each a somewhat hindered, non-rotating macroradical), having anisotropic methylene proton hyperfine couplings which can be treated as isotropic to a good approximation. The 13-line spectrum observed at low conversion with very high radical flux was simulated as a superposition of the spectra of two very similar rotamers, the EPR spectra of which are indistinguishable; either rotamer is part of a very short chain (primarily an initiator fragment which has propagated once) undergoing free rotation in a low-viscosity medium. Thus the EPR spectra can be explained without having to invoke earlier suggestions that there are two types of free radicals (“trapped” and “untrapped”) in these systems, corresponding to the 9-line and 13-line spectra. The existence of an enormous proportion of very short free radicals under conditions of high radical flux is supported by quantitative calculations of the radical chain-length distribution. It is suggested that the two rotamers have significantly different propagation rate coefficients because of differences in the hindered rotations in their transition states
Synthesis and characterization of polystyrene-graphite nanocomposites via surface RAFT-mediated miniemulsion polymerization
No full textSynthesis and Characterization of Polystyrene-Graphite Nanocomposites via Surface RAFT-Mediated Miniemulsion Polymerization
No full textABSTRACT: Graphite oxide (GO) was prepared and immobilized with dodecyl isobutyric acid trithiocarbonate (DIBTC) reversible addition-fragmentation chain transfer (RAFT) agent. The hydroxyl groups of GO were attached to the DIBTC RAFT agent through an esterification process. The resultant modified GO was used for the preparation of polystyrene (PS)/graphite nanocomposites in miniemulsion polymerization. The RAFTgrafted GO (GO-DIBTC) at various loadings was dispersed in styrene monomer, and the resultant mixtures were sonicated in the presence of a surfactant (sodium dodecylbenzene sulfonate) and a hydrophobe (hexadecane) to form miniemulsions. The stable miniemulsions thus obtained were polymerized using azobisisobutyronitrile as the initiator to yield encapsulated PS-GO nanocomposites. The molar mass and polydispersity index of PS in the nanocomposites depended on the amount of RAFT-grafted GO in the system, in accordance with the features of the RAFT polymerization method. The PS-GO nanocomposites were of exfoliated morphology, as confirmed by X-ray diffraction and transmission electron microscopy measurements. The thermal stability and mechanical properties of the PS-GO nanocomposites were better than those of the neat PS polymer. Furthermore, the mechanical properties were dependent on the modified GO content (i.e., the amount of RAFT-grafted GO)
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