The adsorption, storage and release of nitric oxide using ion exchanged zeolites

Zeolites exchanged with transition metal cations Co2+, Mn2+, Zn2+ and Cu2+ are capable of storing and delivering a large quantity of nitric oxide in a range of 1.2-2.7 mmolg(-1). The metal ion exchange impacts the pore volumes of zeolite FAU more significantly than LTA. The storage of NO mainly involves coordination of NO to metal cation sites. By exposing zeolites to a moisture atmosphere, the stored nitric oxide can be released. The NO release takes more than 2 hours for the NO concentration decreasing below similar to 5ppb in outlet gas. Its release rate can be controlled by tailoring zeolite frameworks and optimising release conditions.

Vichy: an ever-present past?

French Cultural Studies 25 anniversary conference
Marseille, May 2013

Luce Irigaray: Back to the Beginning

In 2014 it will be 40 years since Luce Irigaray’s (second) doctoral thesis Speculum de l'autre femme was first published. That book, widely recognized as the most important text in feminist philosophy, was to introduce Irigaray’s critique of western philosophy and psychoanalysis and her ethics of sexual difference for which she was to become so well known. Irigaray, well into her eighties now, has published continuously since Speculum, despite her exclusion from French academic life after her expulsion in 1974 from the Université de Paris VIII Vincennes. That her latest book In the Beginning, She Was, released on the eve of Speculum’s anniversary, is perhaps the most personally revelatory of her works and revisits many of the same themes and issues that concerned her in Speculum cannot be coincidental. In this critical notice we examine Irigaray’s latest offering arguing that her contribution is twofold as she combines with new clarity her longstanding critique of phallocratic culture and her transformative vision of humanity as a culture of sexuate difference. There are a number of important themes addressed in the six chapters of the book, but for the purposes of this discussion our analysis will focus mostly on elaborating her critique of Western culture, on the usefulness of her work for rethinking masculine subject formation and on the figure of Antigone, as a feminine subject on her own terms, as a way of imagining a possible relation between two subjects within a culture of sexuate difference. We argue that this book continues to illustrate Irigaray’s importance as one of the most radical and prophetic philosophers of our time.

Identification of 100 fundamental ecological questions

Fundamental ecological research is both intrinsically interesting and provides the basic knowledge required to answer applied questions of importance to the management of the natural world. The 100th anniversary of the British Ecological Society in 2013 is an opportune moment to reflect on the current status of ecology as a science and look forward to high-light priorities for future work. To do this, we identified 100 important questions of fundamental importance in pure ecology. We elicited questions from ecologists working across a wide range of systems and disciplines. The 754 questions submitted (listed in the online appendix) from 388 participants were narrowed down to the final 100 through a process of discussion, rewording and repeated rounds of voting. This was done during a two-day workshop and thereafter. The questions reflect many of the important current conceptual and technical pre-occupations of ecology. For example, many questions concerned the dynamics of environmental change and complex ecosystem interactions, as well as the interaction between ecology and evolution. The questions reveal a dynamic science with novel subfields emerging. For example, a group of questions was dedicated to disease and micro-organisms and another on human impacts and global change reflecting the emergence of new subdisciplines that would not have been foreseen a few decades ago. The list also contained a number of questions that have perplexed ecologists for decades and are still seen as crucial to answer, such as the link between population dynamics and life-history evolution. Synthesis. These 100 questions identified reflect the state of ecology today. Using them as an agenda for further research would lead to a substantial enhancement in understanding of the discipline, with practical relevance for the conservation of biodiversity and ecosystem function. © 2013 The Authors. Journal of Ecology © 2013 British Ecological Society.

Anniversaries

The hundredth anniversary of the outbreak of the First World War is only the first of a large number of major European historical anniversaries that will occur in the coming four years. Other twentieth-century anniversaries include that of the Russian Revolution and the Easter Uprising; notable corollaries from earlier centuries include the Battle of Bannockburn, the Hanoverian succession, the Battle of Waterloo and, perhaps most significant of all, the five hundredth anniversary of the Lutheran Reformation. Rather than commission special issues or other features to tie in to individual anniversaries centred on or relevant to German history in a manner which repeats unthinkingly the conventions of scholarly and popular culture, the editors elected to reflect more fundamentally on what might be at stake in major anniversaries for professional scholars of history. In anticipation of the major wave of scholarly and popular publications, commemorative activities and memory conflicts that each of these will generate, and in order to reflect upon the dynamics of German history, memory and commemoration in a more overtly comparative context, the editors invited a number of scholars working on different national histories to reflect on the possibilities and potential pitfalls such anniversaries offer to historians who tie their work in to such moments. They are Jörg Arnold (Nottingham), Thomas A. Brady (Berkeley), Fearghal McGarry (Queen’s University, Belfast), Tim Grady (Chester) and Dan Healey (St Antony’s College, Oxford). The questions were posed by the editors.

Dipping Wings:for flute (alto fl), clarinet (bass cot), tpt, vla, vcl, perc and live electronics

commissioned by Ballet Rambert for 60th Anniversary season, choreographer Mary Evelyn, designer Liz Emmanuel. World premiere: Theatre Royal York 03/06/86

What Have We Learned...

Presentation on the outworkings of the selective system of secondary education in Northern Ireland and a commentary on themes emerging on the conference held to mark the 50th anniversary of comprehensive schooling in Scotland. The two main challenges identified were: (1) how to deal with the consequence that not all children arrive in school with the same experiences or support, that is, dealing with the consequences of social disadvantage; and (2) not all post-school outcomes are seen to have the same value, so post-compulsory schooling risks becoming a selective mechanism for entry to more desirable outcomes

Policing the Crisis 35 Years On

This essay reviews the ‘35th anniversary edition’ of Policing the Crisis, the jointly-authored investigation into race, immigration, ‘mugging’ and the ‘crisis in hegemony’ of 1970s Britain. The new edition is demonstrative of the book's enduring influence, including amongst historians increasingly turning their attention towards the roots, development and reach of Thatcherism. This essay places the remarkably prescient conceptual interventions made in Policing in the context of the conditions in which it was produced. Drawing on the author's wider work on the history of the Birmingham Centre for Contemporary Cultural Studies—where the authors of Policing were based—it argues the book should also be read for the insight it provides into the development of cultural studies as a fledging field of inquiry. A broader re-engagement with the work of the so-called ‘Birmingham school’, it is suggested, offers one way of historians developing accounts of 1970s and 1980s Britain that are not overdetermined by the arrival of ‘Thatcherism’.

Immunoassays, optical and electrochemical immunosensorsfor tetrodotoxin determination in puffer fish samples

Tetrodotoxin (TTX) is a low molecular weight and potent marine neurotoxin which is usually present in some species of puffer fish. TTX selectively binds to voltage-sensitive sodium channels (VSGCs), blocking the influx of sodium into the cell and affecting neural transmission. The bioaccumulation of this toxin in seafood can poses a risk to human safety. With the purpose of achieving cheap, specific and reliable tools to determine TTX in puffer fish samples, a self-assembled dithiol-based immunoassay, an electrochemical immunosensor and an optical Surface Plasmon Resonance (SPR) immunosensor are proposed. The immunoassay for TTX based on the use of dithiols self-assembled on maleimide-plates (mELISA) has been able to detect as low as 2.28 μg/L of TTX. The effect of different puffer fish matrixes on this mELISA has been quantified and the corresponding correction factors have been established. This
mELISA has enabled to establish the cross-reactivity factors for four TTX analogues: 5,6,11-trideoxy-TTX, 5,6,11-trideoxy-4-anhydro-TTX, 11-nor-TTX-6-ol and 5,11-deoxy-TTX. The crossreactivity factors have also been established by the optical SPR immunosensor previously reported, which had a limit of detection (LOD) of 4.27 μg/L. The mELISA and the SPR immunosensor have then been tested with spiked-puffer fish matrixes, providing an effective
LOD of 0.23 and 0.43 mg/kg respectively, well below the limit set in Japan (2 mg/kg). The mELISA and the SPR immunosensor have also been applied to the analysis of naturally contaminated puffer fish samples, providing similar TTXs contents between techniques and also compared to LC-MS/MS. The suitability of these immunochemical techniques has been demonstrated not only for screening purposes, but also for research activities. Currently, given that dithiols could improve the electron transfer and the sensitivity of an electrochemical assay, the mELISA strategy is being transferred to gold electrodes for the electrochemical detection of TTX and the subsequent development of the multiplexed electrochemical immunosensor.