165 research outputs found

    Providence College: An Era of Change, Recollections

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    Recollections on Providence College History by Mario DiNunzio, Ph.D. ’57, ’22Hon., emeritus professor of histor

    Applications of resource mobilization theory (RMT) as a framework for distributive justice in the archives field

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    This poster explores whether the resource mobilization theory (RMT) of social movements can serve as a tool for pursuing distributive justice in archives; distributive justice referring to the equitable access to resources necessary for sustainability, agency, and autonomy. Findings of this theoretical literature review indicate that social movement theories such as RMT can provide a valuable lens through which archivists may critically re-examine uneven resource distributions across organizational contexts, facilitating solidaric, accountable, and mutually beneficial relationships necessary to achieve transformative social change

    You Can\u27t Go Home Again...

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    Insights into the Control of Drug Release from Complex Immediate Release Formulations.

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    The kinetics of water transport into tablets, and how it can be controlled by the formulation as well as the tablet microstructure, are of central importance in order to design and control the dissolution and drug release process, especially for immediate release tablets. This research employed terahertz pulsed imaging to measure the process of water penetrating through tablets using a flow cell. Tablets were prepared over a range of porosity between 10% to 20%. The formulations consist of two drugs (MK-8408: ruzasvir as a spray dried intermediate, and MK-3682: uprifosbuvir as a crystalline drug substance) and NaCl (0% to 20%) at varying levels of concentrations as well as other excipients. A power-law model is found to fit the liquid penetration exceptionally well (average R2>0.995). For each formulation, the rate of water penetration, extent of swelling and the USP dissolution rate were compared. A factorial analysis then revealed that the tablet porosity was the dominating factor for both liquid penetration and dissolution. NaCl more significantly influenced liquid penetration due to osmotic driving force as well as gelling suppression, but there appears to be little difference when NaCl loading in the formulation increases from 5% to 10%. The level of spray dried intermediate was observed to further limit the release of API in dissolution

    Processing-Induced Disorder in Pharmaceutical Materials

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    This chapter focuses on the major types of pharmaceutical processing methods that have been widely reported to produce disordered material either intentionally or unintentionally. Milling is one of the most frequently used unit operations used by the pharmaceutical industry for reducing the particle size of solids. Thermal processing techniques are mainly used for controlling or improving the release and the subsequent bioavailability of an active pharmaceutical ingredient (API). Techniques such as melt-mixing, spray-congealing, sintering, melt-granulation, and hot-melt extrusion (HME) have developed and evolved rapidly for large-scale pharmaceutical production. Solvent-evaporation-based methods are important processing techniques for both raw materials, such as crystallization of the raw drug, and formulation manufacturing in the pharmaceutical industry. The chapter discusses the processing that can potentially induce the formation of the disordered state during the manufacture of formulations. The widely used solvent-evaporation-based processing techniques in pharmaceutical formulation production include spray-drying, freeze-drying, film casting, and film coating
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