2,499 research outputs found

    Deactivation of biacetyl triplets by cyanocobaltate(III) complexes

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    The rate of electronic energy transfer from biacetyl triplets to Co(CN)_(5)(X)^(n–)(X = CN^–, MeCN, pyridine, N_(3)^–, H_(2)O, or SCN^–) is strongly dependent on the energy of the first spin-allowed d–d transition of Co(CN)_(5)(X)^(n–), and (for X = CN^–, N_(3)^–, and SCN^–) the direct and sensitized photosubstitution yields are the same, implying a common reactive state

    Late Roman ceramics from the Panayia Field, Corinth (late 4th to 7th C.) : the long-distance, regional and local wares in their economic, social and historical contexts

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    This dissertation presents the Late Roman (late 4th- to 7th-century) ceramic material from the archaeological excavations of the Panayia Field (Corinth, Greece). Through careful analysis of the ceramic fabrics, including petrographic analysis, all of the major wares from the site are characterized, and the mechanisms and networks responsible for each ware's distribution are reconstructed. A major contribution of this study is the equal attention paid to local and regional wares alongside the better-understood long-distance imports. A typological presentation of the ceramic forms documents the range of vessels manufactured in each ware with a consideration of what their presence or absence reveals about activities practiced on or near the site. Additionally, comparison with assemblages from other regional sites illustrates that similar relationships with long-distance, regional, and local networks existed elsewhere. This study concludes with the application of these results to broader issues of economic, social, and historic significance. It explores Corinth's relationship with regional ceramic workshops (the ceramic koine) and argues that a context of economic stability (not decline) was responsible for the intensification of local production and regional networks. Finally, it examines how the study of these ceramics and the various networks that distributed them contributes to the understanding of the history of Corinth and the northeastern Peloponnese at the end of antiquity

    User's guide to resin infusion simulation program in the FORTRAN language

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    RTMCL is a user friendly computer code which simulates the manufacture of fabric composites by the resin infusion process. The computer code is based on the process simulation model described in reference 1. Included in the user's guide is a detailed step by step description of how to run the program and enter and modify the input data set. Sample input and output files are included along with an explanation of the results. Finally, a complete listing of the program is provided

    Novel applications of biomaterials in the management of parastomal hernia and anal fistula

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    MD (res)The aim of this thesis was to explore novel applications for both traditional and contemporary biomaterials in the management of parastomal hernia and anal fistula. Parastomal hernias can be prevented or repaired using synthetic mesh; however, reported complications include infection, fibrosis and potential bowel erosion. The prophylactic role of a cross-linked collagen implant was assessed in terms of safety, feasibility and potential efficacy. Additionally, the human host response to this implant was evaluated. There were no complications related to infection or the implant‟s proximity to the bowel. The implant had excellent biocompatibility and resistance to degradation in most patients, and although fibrovascular in-growth and ECM deposition were limited, it seems to have excellent potential for soft tissue reinforcement and, more specifically, prevention of parastomal hernias. Anal fistulas are in the main successfully treated by surgical fistulotomy, however damage to the anal sphincter complex and subsequent incontinence have led to the development of other techniques which aim to either lessen or avoid such disturbance. One strategy involves the traditional cutting seton, and a modification of this technique, the „snug‟ silastic seton was assessed. In the short-medium term, this modification was demonstrated to be an effective addition to the fistula surgeon‟s armamentarium, although minor incontinence remained a concern. Other approaches employing contemporary biomaterials, fibrin glue and porcine intestinal submucosa, are aimed at tissue repair, rather than minimizing destruction. Their success rates however are highly variable. A pilot study aiming to assess the safety and potential efficacy of an 4 alternative biomaterial, cross-linked collagen in two different physical formats, was presented. In the short-medium term, both formats were shown to be safe, and equally effective. The results justify continued research into the use of biologically derived materials to heal anal fistulas. In conclusion, although disparate pathologies were addressed, both they and the thesis are unified by demonstrating that an understanding of the specific disease pathology, wound healing, and the host response to materials (synthetic and biological) are central to their successful management

    Faculty Development: Equipping teachers with the skills to assist students to develop their clinical reasoning and communication skills in patient consultations - an integrated approach

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    This interactive and multimedia workshop will showcase an approach that integrates the teaching of communication and clinical reasoning skills, through observation and discussion.· To consider the challenges teachers/tutors (experts) might face in helping medical students (novices) develop their clinical reasoning skills· To develop awareness of the role of faculty development in helping teachers/tutors develop the skills required for both clinical reasoning and communication skills teaching in real life patient encounters.· To encourage delegates to share best practice and reflect on faculty development in their own institutions

    Self assessment: acute-onset vomiting in a Tibetan Terrier

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