54 research outputs found

    Reusing pre-consumer textile waste

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    Concentration, pH, and Surface Charge Effects on Cadmium and Lead Sorption in Three Tropical Soils

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    Reactions of heavy metals with soil are important in determining metal fates in the environment. Sorption characteristics of two heavy metals, Cd and Pb, in three tropical soils (Mollisol, Oxisol, and Ultisol) from Puerto Rico were assessed at varying metal concentrations (0 to 1.2 mM) and pH values (approximately 2 to 7). All soils sorbed more Pb than Cd. Sorption maxima were obtained for each metal for the Oxisol and Ultisol soils, but not the Mollisol. Sorption appeared to depend more on soil mineralogy than organic matter content. Sorption isotherms were linear within the sorption envelope with similar slopes for each soil-metal curve, when plotting metal sorption as a function of pH. Cadmium and Pb isotherms yielded average slopes of approximately 36+/-1 and 28+/-1 units (percent increase in metal sorption per 1-unit increase in pH), respectively. Metal sorption depended more on metal type than soil composition. Cadmium sorption displayed a greater pH dependence than Pb. Cadmium sorption was less than or equal to the amount of negative surface charge except at pH values greater than the point of zero net charge (PZNC). This suggests that Cd was probably sorbed via electrostatic surface reactions and/or possible inner-sphere complexation at pH \u3e 3.7. However, the amount of Pb sorbed by the Oxisol was greater than the amount of negative surface charge, suggesting that Pb participates in inner-sphere surface reactions. Lead was sorbed more strongly than Cd in our soils and poses less of a threat to underlying ground water systems due to its lower mobility and availability

    Cross-Sector Partnerships to Address Social Issues: Challenges to Theory and Practice

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    Sex, Gender, and IT: The Lasting Effects of Gender Bias in Information Technology Customer Service

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    The field of Institutional Technology has been perceived to be primary dominated by white males. As this field has become more diverse, customer expectations and responses to the changes vary. Through content analysis of prominent web logs written by male and female members of the IT community who provide direct support to customers, this research found gender preference for white males in customer service assistance

    Prisoners

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    https://digitalcommons.unf.edu/campus_art/1294/thumbnail.jp

    The Devaluing of Nurses in Healthcare: Media Portrayals and Their Effect on the Public\u27s Opinion on Nurses

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    As healthcare related issues continue to rise, an unexplored problem persists beyond the scope of current debate; fueled by ignorance and mainstream media portrayals, nurses worldwide are undervalued for their work, resulting in unrealistic hiring and education expectations. These expectations result in a shortage of some of the most valuable workers in the healthcare industry and leaves everyone at risk. Yet, the public is lax to any call to action because of a misrepresentation of nurses in mainstream media. This study focused on media portrayals of nurses, following a qualitative analysis of several popular medical based television shows from the late 1980’s to 2010. From the research, a model for the mainstream nurse appears; female doctor\u27s assistant. Useful for menial labor, but not for important medical emergencies. By juxtaposing this model against a typical nursing workload, the discrepancy between television fiction and reality becomes clear. This research demonstrated how the inconsistencies between the public understanding of the role of nurses and the actual work performed by nurses has created a system in which nurses are undervalued and underutilized, imposing an artificial shortage within the healthcare industry

    Achieving goals in higher education

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