Simultaneous polymerization and molding of Pyrrone polymers

Simultaneous polymerization and hot pressing of Pyrrone polymer

Re-locating media production

It was arguably easier in the past to pin down media production in medium- or content-specific locales, such as the studio, the newsroom or the set. Contemporary processes of media convergence have dramatically opened up the ‘what’ and ‘where’ of media production to include all manner of quotidian practices and ephemeral places. This special issue however pushes back against the idea that contemporary landscapes of media production have been flattened. Each of the articles collected here accounts for significant transformations in media practices nearer to those which we would conventionally associate with media production, yet which are also potentially left behind in the rush to describe, theorize, celebrate and critique trends such as ‘produsage’, ‘prosumption’ and participatory media culture. Taken together, the papers in this special issue provide new insights into the locations and re-locations of contemporary media production across new and under-researched liminal and peripheral geographies, and around new and unexpected objects

ORDINARY LEAST SQUARES REGRESSION OF ORDERED CATEGORICAL DATA: INFERENTIAL IMPLICATIONS FOR PRACTICE

Ordered categorical responses (OCRs) are frequently encountered in many disciplines. Examples of interest in agriculture include quality assessments, such as for soil or food products, and evaluation of lesion severity, such as teat ends status in dairy cattle. OCRs are characterized by multiple categories recorded on a ranked scale that, while apprising relative order, is not informative of absolute magnitude of or proportionality between the categories. A number of statistically sound models for OCRs are available in the statistical literature, such as logistic regression and probit models, but these are commonly underutilized in practice. Instead, the ordinary least squares linear regression (OLSLR) model is often employed despite violation of basic model assumptions. In this study, the inferential implications of OLSLR-based inference on OCRs were investigated using a simulation study that evaluated realized Type I error rate and empirical statistical power. The design of the simulation study was motivated by applications reported in the subject-matter literature. A variety of plausible scenarios were considered for simulation, including various shapes of the frequency distribution and number of categories of the OCR. Using survey data on frequency of antimicrobial use in cattle feedlots, we illustrated the inferential performance of OLSLR on OCRs relative to a probit model

The effect of common groundwater anions on the aqueous corrosion of zero-valent iron nanoparticles and associated removal of aqueous copper and zinc

This is the final version. Available from Elsevier via the DOI in this record.This work has investigated the influence of common groundwater anions (Cl−, NO3−, SO42− and HCO3−) on the corrosion behaviour and associated removal of copper (Cu) and zinc (Zn) ions onto nanoscale zero-valent iron particles (nZVI). After 16 week exposure to solutions containing each anion at 10 mM concentrations, nZVI was observed to corrode into different iron (hydr)oxide phases (determined using XRD), depending upon the anion present: HNO3− produced goethite particles; NO3− produced predominantly magnetite/maghemite particles; both SO42− and Cl− produced a mixture of phases, including magnetite/maghemite, lepidocrocite and goethite. For solutions containing the different anions and 0.3 mM concentrations of Cu or Zn, near-total metal removal onto nZVI was recorded in the initial stages of the reaction (e.g. <24 h) for all systems tested. However, when Cl− and SO42− were also present significant subsequent desorption was recorded and attributed to the influence of anionic pitting corrosion. In contrast, no Cu or Zn desorption was recorded for batch systems containing NO3−, which was attributed to the enmeshment of Cu or Zn in a mixed-valent iron oxide shell. Results herein therefore demonstrate that NO3− could be utilised alongside nZVI to improve its long-term performance for in situ water treatment applications.National Enviroment Research Council (NERC

The Effects of Moral Obligations to Others and Others\u27 Influence on Veterinarians\u27 Attitudes toward and Recommendations to Utilize Antibiotics in Feedlot Cattle

Decisions to behave in particular ways depend on beliefs, social norms, perceived constraints, and attitudes. Recently, this perspective has been expanded to consider the role of moral obligations in such decisions. Largely ignored are the possible interrelations among moral obligations to significant others and significant others’ influences as they interact to affect decisions. This is of particular interest when a strong moral obligation toward a significant other is associated with strong behavioral expectations by that same significant other. We investigated the interrelations among moral obligations to, and behavioral expectations from, 11 types of significant others in the cattle feeding industry to determine their joint influences on attitudes toward antibiotic use and recommendations for antibiotics in feedlot cattle, drawing data from a random sample of feedlot veterinarians (n=103). Results show that subjective norms and a sense of moral obligation affect both the attitudes toward, and the recommendations for, the use of antibiotics in feedlot cattle. We found several significant interactions among subjective norms and moral obligations, which suggests that perceived moral obligations to peers, clients, and the regulatory norm-setting sector associated with the feedlot industry increase the impact of social pressures from those sectors on the recommendation to use antibiotics in acutely sick, chronically sick, and high-risk feedlot cattle

Space, place and circulation: Three conceptual lenses into the spatialities of media production practices

Book synopsis: This book introduces and develops the concept of geomedia studies as the name of a particular subfield of communication geography. Despite the accelerating societal relevance of ‘geomedia’ technologies for the production of various spaces, mobilities, and power-relations, and the unquestionable emergence of a vibrant research field that deals with questions pertaining to such topics, the term geomedia studies remains surprisingly unestablished. By addressing imperative questions about the implications of geomedia technologies for organizations, social groups and individuals (e.g. businesses profiting from geo-surveillance, refugees or migrants moving across national borders, or artists claiming their rights to public space) the book also aims to contribute to ongoing academic and societal debates in our increasingly mediatized world

Effects of siRNA-mediated knockdown of GSK3β on retinal ganglion cell survival and neurite/axon growth

There are contradictory reports on the role of the serine/threonine kinase isoform glycogen synthase kinase-3&beta; (GSK3&beta;) after injury to the central nervous system (CNS). Some report that GSK3 activity promotes axonal growth or myelin disinhibition, whilst others report that GSK3 activity prevents axon regeneration. In this study, we sought to clarify if suppression of GSK3&beta; alone and in combination with the cellular-stress-induced factor RTP801 (also known as REDD1: regulated in development and DNA damage response protein), using translationally relevant siRNAs, promotes retinal ganglion cell (RGC) survival and neurite outgrowth/axon regeneration. Adult mixed retinal cell cultures, prepared from rats at five days after optic nerve crush (ONC) to activate retinal glia, were treated with siRNA to GSK3&beta; (siGSK3&beta;) alone or in combination with siRTP801 and RGC survival and neurite outgrowth were quantified in the presence and absence of Rapamycin or inhibitory Nogo-A peptides. In in vivo experiments, either siGSK3&beta; alone or in combination with siRTP801 were intravitreally injected every eight days after ONC and RGC survival and axon regeneration was assessed at 24 days. Optimal doses of siGSK3&beta; alone promoted significant RGC survival, increasing the number of RGC with neurites without affecting neurite length, an effect that was sensitive to Rapamycin. In addition, knockdown of GSK3&beta; overcame Nogo-A-mediated neurite growth inhibition. Knockdown of GSK3&beta; after ONC in vivo enhanced RGC survival but not axon number or length, without potentiating glial activation. Knockdown of RTP801 increased both RGC survival and axon regeneration, whilst the combined knockdown of GSK3&beta; and RTP801 significantly increased RGC survival, neurite outgrowth, and axon regeneration over and above that observed for siGSK3&beta; or siRTP801 alone. These results suggest that GSK3&beta; suppression promotes RGC survival and axon initiation whilst, when in combination with RTP801, it also enhanced disinhibited axon elongation

The effect of common groundwater anions on the aqueous corrosion of zero-valent iron nanoparticles and associated removal of aqueous copper and zinc

This work has investigated the influence of common groundwater anions (Cl-, NO3-, SO42- and HCO3-) on the corrosion behaviour and associated removal of copper (Cu) and zinc (Zn) ions onto nanoscale zero-valent iron particles (nZVI). After 16 week exposure to solutions containing each anion at 10 mM concentrations, nZVI was observed to corrode into different iron (hydr)oxide phases (determined using XRD), depending upon the anion present: HNO3- produced goethite particles; NO3- produced predominantly magnetite/maghemite particles; both SO42- and Cl- produced a mixture of phases, including magnetite/maghemite, lepidocrocite and goethite. For solutions containing the different anions and 0.3 mM concentrations of Cu or Zn, near-total metal removal onto nZVI was recorded in the initial stages of the reaction (e.g. <24 hrs) for all systems tested. However, when Cl- and SO42- were also present significant subsequent desorption was recorded and attributed to the influence of anionic pitting corrosion. In contrast, no Cu or Zn desorption was recorded for batch systems containing NO3-, which was attributed to the enmeshment of Cu or Zn in a mixed-valent iron oxide shell. Results herein therefore demonstrate that NO3- could be utilised alongside nZVI to improve its long-term performance for in situ water treatment applications