755 research outputs found

    Use of the phototactic ability of a bacterium to teach the genetic principles of random mutagenesis

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    JOHN PECORE is a Ph.D. candidate and Clinical Instructor at Georgia State University, Atlanta, GA 30342; e-mail: jlpscience@bellsouth. net. MELISSA DEMETRIKOPOULOS, Ph.D., is Director of Scientific Communications and Chair of the Division of Program Development and Assessment for the Institute for Biomedical Philosophy, Atlanta, GA 30340; e-mail: [email protected]. KYLE FRANZ, Ph.D., is Assistant Professor of Biology at Georgia State University, Atlanta, GA 30303; e-mail: [email protected] ArticleFinal article publishe

    Troy, Ohio

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    STREETS: Cherry S. [318-533]; Drury Lane W.; Lafayette; Market S. [318-533]; Mulberry S. [320-534]; Plum S. [319-541]; Raper E. [1-121]; Raper W. [1-119]; Simpson E. [1-122]; Simpson W. [1-120]; Walnut S. [318-439]; SPECIALS: Kyle High Schoo

    Trichodesma nancyae Schnepp 2023, new species

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    <i>Trichodesma nancyae</i> Schnepp, new species <p>Figures 23–28</p> <p> Two specimens were seen by the author, the holotype with the following labels “ MEXICO: Guerrero / 10 km. N Chilpancingo / 22 July 1987 / R. Turnbow // [on red] HOLOTYPE / <i>Trichodesma nancyae</i> / Schnepp, 2023 ”; deposited in the FSCA.</p>Published as part of <i>Schnepp, Kyle E., 2023, An illustrated type catalog of Trichodesma LeConte, 1861 (Coleoptera: Ptinidae) from Mexico, with description of a new species, pp. 1-19 in Insecta Mundi 2023 (24)</i> on page 9, DOI: <a href="http://zenodo.org/record/10621762">10.5281/zenodo.10621762</a&gt

    Gods, Spirits, People

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    In this chapter we will be looking at primary sources that deal specifically with human interaction with non-human entities – in particular, gods and spirits. You might initially categorise this as religious history, or even the history of religion and, to a certain extent, you would be right. Nevertheless, aside from the problems inherent in defining the term ‘religion’, there is a significant difference between our approach and the standard academic consideration of religious systems and the place of people and entities within them. In the following chapter we will be challenging you to build on the most recent shifts in religious history scholarship and to engage with all the historical actors that appear in the primary sources – not just humans, but the gods and spirits that they venerate and which intervene in different ways in their daily lives.book chapterThis is a chapter on the theme of 'Gods, Spirits, People' by Dr Andrew Redden and Dr Kyle Jackson. The chapter supports the material available in the 'Gods, Spirits, People' collection of Using Primary Sources: A Practical Guide for Students, an Open Access e-textbook. You will find the record for these materials at: https://kora.kpu.ca/islandora/object/kora:580 The entire textbook is available at: https://liverpooluniversitypress.manifoldapp.org/projects/using-primary-source

    Regulation of arcuate genes by developmental exposures to endocrine-disrupting compounds in female rats

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    Developmental exposure to endocrine-disrupting compounds (EDCs) alters reproduction and energy homeostasis, both of which are regulated by the arcuate nucleus (ARC). Little is known about the effects of EDC on ARC gene expression. In Experiment #1, pregnant dams were treated with either two doses of bisphenol A (BPA) or oil from embryonic day (E)18-21. Neonates were injected from postnatal day (PND)0-7. Vaginal opening, body weights, and ARC gene expression were measured. Chrm3 (muscarinic receptor 3) and Adipor1 (adiponectin receptor 1) were decreased by BPA. Bdnf (brain-derived neurotropic factor), Igf1 (insulin-like growth factor 1), Htr2c (5-hydroxytryptamine receptor), and Cck2r (cholescystokinin 2 receptor) were impacted. In Experiment #2, females were exposed to BPA, diethylstilbestrol (DES), di(2-ethylhexyl)phthalate, or methoxychlor (MXC) during E11-PND7. MXC and DES advanced the age of vaginal opening and ARC gene expression was impacted. These data indicate that EDCs alter ARC genes involved in reproduction and energy homeostasis in females.Peer reviewe

    Electrodynamic cavitation with nanoscale control

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    The design and implementation of a new technique using an atomic force micro-scope (AFM) has allowed new and interesting studies to be performed with nanoscale spatial resolution. A new form of cavitation known as electrodynamic cavitation (EDC) was characterized and used to generate large structures on the surface of Si wafers. Oxide layers grown on Si/SiO2/H 2O and Si/SiO2/Au/H2O interfaces reached maximum heights of 130 nm and 690 nm, respectively. These structures represent a full order of magnitude increase in height over oxides grown in air under similar voltages and time durations. EDC was also used to perform in situ sharpening of a conducting AFM tip in high purity water with decreases in the radius of curvature of the AFM tips by 40% to 100%

    Governing knowledge in the scientific community: Exploring the role of retractions in biomedicine

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    Although the validity of knowledge is critical to scientific progress, substantial concerns exist regarding the governance of knowledge production. While research errors are as relevant to the knowledge economy as defects are to the manufacturing economy, mechanisms to identify and signal “defective” or false knowledge are poorly understood. In this paper, we investigate one such institution – the system of scientific retractions. We analyze the universe of peer-reviewed scientific articles retracted from the biomedical literature between 1972–2006 and comparing with a matched control sample in order to identify the correlates, timing, and causal impact of scientific retractions. This effort provides insight into the workings of a distributed, peer-based system for the governance of validity in scientific knowledge. Our findings suggest that attention is a key predictor of retraction – retracted articles arise most frequently among highly-cited articles. The retraction system is expeditious in uncovering knowledge that is ever determined to be false (the mean time to retraction is less than two years) and democratic (retraction is not systematically affected by author prominence). Lastly, retraction causes an immediate, severe, and long-lived decline in future citations. Conditional on the obvious limitation that we cannot measure the absolute amount of false science in circulation, these results support the view that distributed governance systems can be designed to uncover false knowledge relatively swiftly and to mitigate the costs that false knowledge for future generations of producers.National Science Foundation (U.S.) (Grant 0738394

    Indigenous Detroit: indigeneity, modernity, and racial and gender formation in a modern American city, 1871-2000

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    This dissertation traces the role of indigeneity in the formation of modern Detroit and the impact of urban culture on the reemergence of Indigenous people in that same location at the end of the 20th century. Covering more than a hundred years of urban Indigenous history between the nexus of urban history and Indigenous studies, Indigenous Detroit examines, first, non-Natives elites, and later, Native people, and how both deployed gendered and racialized versions of indigeneity. In both instances, “indigenous” identities carried racial and gendered meanings that helped to animate their appeal. Using local newspapers, government documents, and oral histories, this dissertation demonstrates how non-Indians used images of indigeneity to erase Native people from Detroit’s history. Indigenous people reasserted their presence in the Motor City, challenging longstanding definitions of indigeneity. In the first two chapters, I argue that, in a quest to bolster both white masculinity and Detroit’s urban standing, elite white men both memorialized and erased Detroit’s indigenous past. However, as I argue in chapters three and four, Indigenus residents such as Dakota Charles Eastman and women like my great-grandmother Esther Shawboose Mays carved out spaces in Detroit to reinvigorate and redefine indigeneity through the creation of Indigenous cultural and educational institutions in a city now predicated on blackness, whiteness, and labor.Submission published under a 24 month embargo labeled 'U of I only', the embargo will last until 2017-05-01The student, Kyle Mays, accepted the attached license on 2015-04-22 at 12:01.The student, Kyle Mays, submitted this Dissertation for approval on 2015-04-22 at 12:08.This Dissertation was approved for publication on 2015-04-22 at 15:30.DSpace SAF Submission Ingestion Package generated from Vireo submission #8020 on 2015-07-22 at 14:18:32Made available in DSpace on 2015-07-22T22:33:46Z (GMT). No. of bitstreams: 2 MAYS-DISSERTATION-2015.pdf: 18256142 bytes, checksum: 03308484ff0bae9091d66b9c84447e38 (MD5) LICENSE.txt: 4206 bytes, checksum: be3c220e0810d819b9480173a13a38e2 (MD5) Previous issue date: 2015-04-22Embargo set by: Seth Robbins for item 79894 Lift date: 2017-07-22T22:34:16Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 79894 on 2017-07-23T09:15:17Z
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