Microfluidic culture platform for studying neuronal response to mild to very mild axonal stretch injury     

Yiing C. Yap  Tracey C. Dickson  Anna E. King  Michael C. Breadmore  Rosanne M. Guijt 《Biomicrofluidics》2014,8(4)

A new model for studying localised axonal stretch injury is presented, using a microfluidic device to selectively culture axons on a thin, flexible poly (dimethylsiloxane) membrane which can be deflected upward to stretch the axons. A very mild (0.5% strain) or mild stretch injury (5% strain) was applied to primary cortical neurons after 7 days growth in vitro. The extent of distal degeneration was quantified using the degenerative index (DI, the ratio of fragmented axon area to total axon area) of axons fixed at 24 h and 72 h post injury (PI), and immunolabelled for the axon specific, microtubule associated protein-tau. At 24 h PI following very mild injuries (0.5%), the majority of the axons remained intact and healthy with no significant difference in DI when compared to the control, but at 72 h PI, the DI increased significantly (DI = 0.11 ± 0.03). Remarkably, dendritic beading in the somal compartment was observed at 24 h PI, indicative of dying back degeneration. When the injury level was increased (5% stretch, mild injury), microtubule fragmentation along the injured axons was observed, with a significant increase in DI at 24 h PI (DI = 0.17 ± 0.02) and 72 h PI (DI = 0.18 ± 0.01), relative to uninjured axons. The responses observed for both mild and very mild injuries are similar to those observed in the in vivo models of traumatic brain injury, suggesting that this model can be used to study neuronal trauma and will provide new insights into the cellular and molecular alterations characterizing the neuronal response to discrete axonal injury.  相似文献   

Library Study Behaviors in the Age of Ubiquitous Mobile Devices: An Observational Study in Four Academic Libraries     

Amy Catalano  Lawrence Paretta  Claudia McGivney  Tara King 《The Reference Librarian》2014,55(4):328-342

In this study, researchers observed student study behaviors in the libraries of four post-secondary institutions. In all, 2,773 observations were made. This research replicates and expands an earlier study and addresses its limitations. The results of a logistic regression test indicate whether students had a mobile device readily available and where students chose to study in the library best predicted whether they demonstrated a study, as opposed to a non-study, behavior. Specifically, if students were found in quiet study or computer areas, they were more likely to be performing study behaviors. This research has implications for library stakeholders making decisions about the use of library space. Most importantly, this research demonstrates that library spaces are widely used for diverse purposes.  相似文献   

Examining the application of Web 2.0 in medical-related organisations     

Chu SK  Woo M  King RB  Choi S  Cheng M  Koo P 《Health information and libraries journal》2012,29(1):47-60

Objectives: This study surveyed Web 2.0 application in three types of selected health or medical‐related organisations such as university medical libraries, hospitals and non‐profit medical‐related organisations. Methods: Thirty organisations participated in an online survey on the perceived purposes, benefits and difficulties in using Web 2.0. A phone interview was further conducted with eight organisations (26.7%) to collect information on the use of Web 2.0. Data were analysed using both quantitative and qualitative approaches. Results: Results showed that knowledge and information sharing and the provision of a better communication platform were rated as the main purposes of using Web 2.0. Time constraints and low staff engagement were the most highly rated difficulties. In addition, most participants found Web 2.0 to be beneficial to their organisations. Conclusions: Medical‐related organisations that adopted Web 2.0 technologies have found them useful, with benefits outweighing the difficulties in the long run. The implications of this study are discussed to help medical‐related organisations make decisions regarding the use of Web 2.0 technologies.  相似文献   

‘Standing back’ or ‘stepping up’? Exploring climate change education policy influence in England     

Kate Greer  Heather King  Melissa Glackin 《British Educational Research Journal》2023,49(5):1088-1107

This paper explores the nature of climate change education-related policy influence in England at a time when public consciousness about the need to accelerate climate change action was heightened, and as the 2018 climate strikes gathered momentum around the world. Informed by Foucault's concept of ‘governmentalities’, and using data generated through 24 exploratory interviews and reflexive thematic analysis, we examine the extent to which influential individuals were advocating for policy change. We discuss the nature of policy influence with particular reference to the ‘stances’ that individuals adopted relative to climate change education policy influence and noting a common tendency exhibited amongst participants which was a tendency towards ‘deference’. Coupling our insights with theorisations of dissent, we consider how ‘infra-political dissent’ could support key individuals to ‘step up’ and influence for more effective policy relative to climate change education, and to other areas of education or environment policy.  相似文献   

Curators: Ethics and Obligations     

Mary Elizabeth King 《Curator: The Museum Journal》1980,23(1):10-18

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Strategies for transferring training     

Marsha King 《Performance Improvement》1996,35(8):30-32

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Picturing quality     

Steve King 《Performance Improvement》1992,31(4):10-12

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