248 research outputs found

    Recovery of O-18 target water after its use for F-18 fluorodeoxyglucose production

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    Oxygen-18 (0-18) water is routinely used for production of fluorine-18 (F-18)containing radiolabeled tracers used for diagnosis of various diseases and disorders by positron emission tomography (PET). After the use of 0-18 water in a cyclotron to produce F-18 containing compounds, many contaminants are left behind in the 0-18 water. 0-18 water is quite expensive and rare; therefore, the 0-18 water should be recovered for reuse. However, most PET facilities are privately run and there are no widely used procedures for the use of 0-18 water, so the types of impurities in used 0-18 water vary widely from one facility to another. Therefore, there needs to be developed widely applicable procedure for the recovery of 0-18 water for reuse.The two basic types of contaminants in used 0-18 water are organic and ionic contaminants. Many experiments involving ion-exchange, organic adsorption, distillation,UV irradiation, and permanganate oxidation were attempted with the goal of recovering 0-18 water for reuse. In order for a technique to be successful, it needs to remove most of the organic and ionic contamination from the used 0-18 water regardless of what the specific contaminants are. The technique also should not result in the dilution the 0-18 water samples with 0-16 water. After much experimentation, the most successful technique was found to be a reflux of the used 0-18 water samples with potassium permanganate followed by two distillations

    Relationship of the Greater Boston Community Fund and the Greater Boston Community Council with organized labor

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    Thesis (M.S.)--Boston University, 1947. This item was digitized by the Internet Archive

    An investigation of early attention in young children through the use of stroop task variants

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    Stroop interference through the colour-word task has been a popular means of studying selective attention since its introduction in 1935. Little effort has been made to adapting a non-verbal task for use with pre-school children. Cramer (1976) devised a colour-picture task where pictures characteristically associated with a particular colour (such as a picture of a banana and the colour yellow) were presented in incongruous colours (e.g., a blue banana). A series of studies was conducted with children aged between 3 and 8 years of age which investigated facets of this colour-picture task. Two methods of responding were compared - a verbal response, and a manual response that allowed younger children to participate (a card-sorting technique). In addition to the basic colour-picture task where children named colours and forms, another task was introduced where children 'prescribed' the correct colour of incorrectly-coloured pictures (Santostefano, 1978; Sebovà & Árochovà, 1986). Results showed that children consistently displayed increased latencies when colour-naming and colour-sorting characteristically and uncharacteristically-coloured pictures. Interference was frequently found for inappropriately-coloured but not appropriately-coloured pictures in form-naming/sorting tasks. The prescribing task proved difficult for children to complete and produced increased latencies and error rates. Performance of the naming colour-picture task was compared to classic Stroop colour-word procedures in children aged between 5 and 8. There were correlations between colour naming in the colour-picture and colour-word tasks for children aged 5 - 7. Performance in the prescribing task did not correlate. It is concluded that the tasks are good measures of selective attention but not necessarily direct equivalents of the colour-word task. An evaluation of the verbal and non-verbal methods is also given

    Partial purification and characterization of soluble cyclic nucleotide phosphodiesterases in human and murine tissues

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    A thesis submitted to the Faculty of Medicine, University of the Witwatersrand, Johannesburg in fulfilment of the requirements for the degree of Doctor of Philosophy Johannesburg, 198

    A survey of rheumatoid arthritic patients in relation to mobilizing exercises

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    Thesis (M.S.)--Boston Universit

    Marion Frances Bush Papers, 1948-2019

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    The Origin and Development of the Open Air School

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    Open Air Schools came into existence because people had found a need for them. Some children were for one reason or another not profiting by a regular school routine. There were several causes for this. One cause was that some children had come in contact with tuberculosis and scientific studies showed that the tuberculosis germs could be best treated by out-of-door rest and good nourishing food. Other children were malnourished so didn’t have the resistance to fight off colds and tiredness. Still others had had operations and were not strong enough to attend a regular school. Open Air Schools are based on the conception that the first essential to a worthy education is sound bodily health. Since the regular routine of the ordinary public school does not take care of children who because of their physical condition cannot compete with their normal classmates, the Open Air School became necessary

    Reflecting theologically on the impact of HIV in Edinburgh with particular reference to infected people, health and social care professionals, Scottish churches and local agency, Waverley Care.

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    This thesis discusses the impact of HIV in Edinburgh on infected individuals, professionals and the Scottish churches. It is grounded in contextual practical theology, offering reflexive responses to evidence gleaned from oral histories. The thesis documents the development of a local agency, Waverley Care, exploring the influences and pressures that contributed to its distinctive ethos. The author was employed as chaplain to people living with HIV from 2000 – 2016; the pastoral and professional relationships that emerged from that ministry form the foundation for the research. Unstructured interviews were conducted and Interpretative Phenomenological Analysis was used to analyse, interpret and reflect on the resultant material. Personal stories and perspectives were shared, both by people living with HIV and by professionals in the field. The impact of living with HIV is shown by discussing issues such as the ongoing impact of HIV-related stigma and the challenges associated with living long-term with the condition. Attention is paid to the challenges arising as a result of multiple bereavements and the resultant spiritual questions that emerge. The impact on physicians is also evidenced, in particular the transition from treating patients before the advent of effective medication, to the situation in 2016 when HIV has been re-classified as a chronic illness. Recommendations on areas of ongoing concern are made for decision makers in public health, the churches and Waverley Care. Deep reflective analysis is offered, using the Stations of the Cross and models from bereavement work to provide frameworks for understanding. The contribution of the Scottish churches to the establishment of support services is recognised; the churches’ influence, both positive and negative on discourse on human sexuality is discussed. The research evidences the impact of the provision of spiritual care within a secular agency, showing that it is possible to create sacred space and to deliver a sacramental ministry within a non-church setting
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