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Journal Articles, Multidisciplinary Digital Publishing Institute (MDPI)

Permanent URI for this collection

https://hdl.handle.net/10919/78882

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Browsing Journal Articles, Multidisciplinary Digital Publishing Institute (MDPI) by Department "Center for Coastal Studies"

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    Considering COVID-19 through the Lens of Hazard and Disaster Research
    Ritchie, Liesel A.; Gill, Duane A. (MDPI, 2021-06-30)
    Decades of social science research have taught us much about how individuals, groups, and communities respond to disasters. The findings of this research have helped inform emergency management practices, including disaster preparedness, response, recovery, and mitigation. In the context of the COVID-19 pandemic, most of us—researchers or not—have attempted or are attempting to make sense of what is going on around us. In this article, we assert that we need not examine the pandemic in a vacuum; rather, we can draw upon scholarly and practical sources to inform our thinking about this 21st century catastrophe. The pandemic has provided an “unfortunate opportunity” to revisit what we know about disaster phenomena, including catastrophes, and to reconsider the findings of research from over the years. Drawing upon academic research, media sources, and our own observations, we focus on the U.S. and employ disaster characteristics framework of (1) etiology or origins; (2) physical damage characteristics; (3) disaster phases or cycles; (4) vulnerability; (5) community impacts; and (6) individual impacts to examine perspectives about the ways in which the ongoing pandemic is both similar and dissimilar to conceptualizations about the social dimensions of hazards and disasters. We find that the COVID-19 pandemic is not merely a disaster; rather, it is a catastrophe.
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    Inactivation of Aeromonas hydrophila and Vibrio parahaemolyticus by Curcumin-Mediated Photosensitization and Nanobubble-Ultrasonication Approaches
    Rafeeq, Shamil; Shiroodi, Setareh; Schwarz, Michael H.; Nitin, Nitin; Ovissipour, Mahmoudreza (MDPI, 2020-09-16)
    The antimicrobial efficacy of novel photodynamic inactivation and nanobubble technologies was evaluated against Vibrio parahaemolyticus and Aeromonas hydrophila as two important aquatic microbial pathogens. Photodynamic inactivation results showed that LED (470 nm) and UV-A (400 nm)-activated curcumin caused a complete reduction in V. parahaemolyticus at 4 and 22 °C, and a greater than 2 log cfu/mL reduction in A. hydrophila, which was curcumin concentration-dependent (p < 0.05). Furthermore, the photodynamic approach caused a greater than 6 log cfu/mL V. parahaemolyticus reduction and more than 4 log cfu/mL of A. hydrophila reduction in aquaponic water samples (p < 0.05). Our results with the nanobubble technology showed that the nanobubbles alone did not significantly reduce bacteria (p > 0.05). However, a greater than 6 log cfu/mL A. hydrophila reduction and a greater than 3 log cfu/mL of V. parahaemolyticus reduction were achieved when nanobubble technology was combined with ultrasound (p < 0.05). The findings described in this study illustrate the potential of applying photodynamic inactivation and nanobubble–ultrasound antimicrobial approaches as alternative novel methods for inactivating fish and shellfish pathogens.