2,590 research outputs found
Doing voices: reading language as craft in black British poetry
No full textThis is the author's final draft post-refereeing as published in The Journal of Commonwealth Literature published online 14 April 2014 DOI:10.1177/0021989414529121. The online version of this article can be found at: http://jcl.sagepub.com/content/early/2014/04/11/0021989414529121This essay offers a detailed exploration and comparative reading of two poems published 20 years apart: John Agard’s “Listen Mr Oxford Don” (1985), and Daljit Nagra’s “Kabba Questions the Ontology of Representation, the Catch-22 for ‘Black’ Writers…” (2007). The former poem is well-known, being regarded by a range of scholars as the acme of (and often, shorthand for) self-reflexively dialogic black British voice poetry, as it emerged in the 1980s, that plays off the friction between writing and speech. The latter is a complex and satirical take on poetic convention and canonicity – including the legacies of 1980s black British poetry – that exploits a tension between written poetic convention and artifice on the one hand, and the idea of the voiced poem as conveying “presence” or “authenticity” on the other. Both poems direct us towards a structuring paradox in which the embodied immediacy of human voice is mediated through the graphic conventions of written poetry. Reading these poems together, the essay considers on the one hand, how ideas about poetic form, language, and voice emerge out of particular historical junctures; and on the other, how such attentiveness to context can help us to develop techniques of a postcolonial “close reading”, eschewing totalizing formulae or summative evaluations of linguistic dissidence
Unveiling the Structure Sensitivity for Direct Conversion of Syngas to C2-Oxygenates with a Multicomponent-Promoted Rh Catalyst
No full textAbstract: Mn and Li promoted Rh catalysts supported on SiO2 with a thin TiO2 layer were synthesized by stepwise incipient wetness impregnation approach. The thin TiO2 layer on the surface of SiO2 was proved to stabilize those small Rh nanoparticles and hinder their agglomeration. The reducibility of Rh on these catalysts depends on Rh particle size as well as the position of manganese oxide, and large Rh nanoparticles with MnO on Rh nanoparticles can be only reduced at an elevated temperature. Catalyst with large Rh particles exhibits a higher CO conversion and higher products selectivity towards long chain hydrocarbons and C2-oxygenates at the expense of decreasing methane formation than a similar catalyst with smaller Rh particles. This was attributed to the synergistic effect of Mn and Li promotion and molar ratio between Rh0 and Rhδ+ sites on the surface of Rh nanoparticles. Moreover, Rh nanoparticles on MnO are proved to be more efficient in promoting hydrogenation of acetaldehyde to ethanol than its counterpart with MnO on Rh nanoparticles. Finally, in order to target high C2-oxygenates selectivity, low reaction temperature together with a low H2/CO ratio in the feed is recommended. Graphic Abstract: [Figure not available: see fulltext.].ChemE/Catalysis EngineeringChemE/O&O groe
Observations on the role of the Rh factor in human disease, with particular reference to mental deficiency
No full textThe study of the Rh Factor in all its ramifications is an
extraordinarily fascinating one, and the discovery of its
presence in human blood has lead to far -reaching consequences.
Many workers on both sides of the Atlantic have done intensive
research work on this subject since the discovery of the factor
was first published in 1940. The great majority of these
workers have been concerned essentially with its influence on physical disease, the mental aspects being either ignored
entirely or only lightly touched upon.Recent work in America, however, has suggested that
possibly the Rh factor may play an important part in the
aetiology of some cases of mental deficiency, at present of
unknown aetiology. The number of cases of mental deficiency
in our institutions, apart from the large number cared for at
home, both in this country and in America, as well as in other
countries, lends urgency to any research which will throw light
on the cause of this distressing condition; as prophylaxis is even more essential in mental deficiency than in most other
forms of disease owing to the fact that there is no possible
cure. If a means of preventing even a small proportion of the
present number of defectives from being born could be found,
the result would be well worth while from an economic and social
point of view, apart altogether from the avoidance of the
distress caused to parents who have the misfortune to produce
a :mentally defective child.The object of the present work is two-fold. In the first
place, a review of the literature will be given, showing on the one hand how the Rh factor came to be associated with the
condition known as E rythroblastos is Foetalis, and on the other
how this condition was associated with Kernicterus and its
consequences. An attempt will be made to correlate these two
lines of research and to show how the idea developed that the
Rh factor may cause certain cases of mental deficiency other
than those obviously associated with Kernicterus. In the
second place, my own investigations will be described, and my
results compared with those already in the literature. Certain
case histories will be described and commented on, and finally,
attention will be drawn to any inference and conclusions that
can be made
Computational Exploration of Rh-III/Rh-V and Rh-III/Rh-I Catalysis in Rhodium(III)-Catalyzed C-H Activation Reactions of N-Phenoxyacetamides with Alkynes
No full textThe selective rhodium-catalyzed functionalization of arenes is greatly facilitated by oxidizing directing groups that, act both as directing groups and internal oxidants. We report density functional theory (B3LYP and M06) investigations on the mechanism of rhodium(III)-catalyzed redox coupling reaction of N-phenoxyacetamides with alkynes. The results elucidated the role of the internal oxidizing directing group, and the role of Rh-III/Rh-I and Rh-III/Rh-V catalysis of C-H functionalizations. A novel Rh-III/Rh-V-Rh-III cycle successfully rationalizes recent experimental observations by Liu and Lu et al. (Liu, G. Angew. Chem. Int. Ed. 2013, 52, 6033) on the reactions of N-phenoxyacetamides with alkynes in different solvents. Natural Bond Orbital (NBO) analysis confirms the identity of Rhy intermediate in the catalytic cycle.National Natural Science Foundation of China [21133002, 21203004]; Shenzhen Peacock Program [KQTD201103]; National Science Foundation of the USA [CHE-1361104]; National Science Foundation under the CCI Center for Selective C-H Functionalization [CHE-1205646]; National Science Foundation [OCI-1053575]SCI(E)[email protected]; [email protected]
Solvent effects in heterogeneous selective hydrogenation of acetophenone: differences between Rh/C and Rh/Al2O3 catalysts and the superiority of water as a functional solvent
No full textSelective hydrogenation of acetophenone (AP) to 1-phenylethanol (PhE) was investigated over Rh/Al2O3 and Rh/C catalysts in 13 solvents including water and conventional organic solvents. Strong solvent effects on the overall rate of AP conversion were observed in different manners depending on the catalysts used. The conversion obtained is correlated with hydrogen-bond-donation (HBD) capability for Rh/C but with hydrogen-bond-acceptance (HBA) capacity for Rh/Al2O3. The solvent effects should result from interactions between the carbonyl group of AP and the solvent molecules through hydrogen bonding for Rh/C and from those between the solvent molecules and the catalyst surface for Rh/Al2O3 having HBD hydroxyl groups on its surface. Water is the most effective functional solvent in the selective hydrogenation of AP for C and Al2O3-supported Rh catalysts due to its high HBD capability (a) and low HBA capability (beta), respectively. For the hydrogenation with Rh/Al2O3 in water, its large polarity/polarizability index (pi*) may contribute to the high selectivity to PhE
Living between languages: The politics of translation in Leila Aboulela’s Minaret and Xiaolu Guo’s A Concise Chinese-English Dictionary for Lovers
No full textThis is the author's final draft post-refereeing as published in The Journal of Commonwealth Literature 2012 47: 207 DOI:10.1177/0021989412440433. The online version of this article can be found at: http://jcl.sagepub.com/content/47/2/20
Adverse effects of potassium on NO<sub>x</sub> reduction over Di-Air catalyst (Rh/La-Ce-Zr)
No full textThe influence of potassium in Rh on a lanthium promoted zirconia stablised ceria (CZ) catalysts was studied toward NOxreduction reactivity and selectivity. The results are compared with a Rh/CZ catalyst. The samples were characterised by N2 adsorption, XRD, SEM, ICP, and H2-TPR. The study highlighted the importance of stored NOx regeneration over potassium in determining the overall performance of the Rh/K/CZ catalyst. The NOx stored over Rh/K/CZ in the previous NO gas stream cannot be regenerated sufficiently during the C3H6 gas stream, and stored NOxgradually decreased from one cycle to the next, resulting in deteriorating performance of Rh/K/CZ. Besides, problem of NOx slip, the formation of both NH3 and N2O (selectivities up to 30% for each side product) were observed by the addition of potassium into the Rh/CZ catalyst system, depending on the reaction conditions applied and the severity of the catalyst deactivation.</p
Reading/Writing Multilingualism: language, literature and creativity in the multilingual classroom
No full textThis article examines the relationship between the discipline of ‘English Literature’, and the contemporary multilingual classroom. It argues that our field has often been cast as a kind of corrective to the ‘problem’ of language diversity by helping to teach language norms, literature can – and should – be made a preeminent space for students to reflect on their own experiences of language diversity, and to translate this into self-reflexive critical tools to think about language in literature. As an example of this kind of practice in action, the article discusses the practices and outcomes of a project in the English Literature department at Queen Mary University of London, called Reading/Writing Multilingualism, working with year 10 and 12 students from two local secondary schools who have English as an additional language
Rh promoted In2O3 as a highly active catalyst for CO2 hydrogenation to methanol
No full textSynthesis of methanol with high selectivity and productivity through hydrogenation of CO2 is highly attractive. This work uses a Rh doped In2O3 catalyst to achieve a high methanol productivity of 1.0 g(MeOH) h(-1) g(cat)(-1) while maintaining the intrinsic high selectivity of pure In2O3. Rh facilitated the dissociation of H-2 leading to creation of oxygen vacancies over the In2O3 surface. In addition, Rh atoms also participated in the activation of CO2 to produce formate species with a low activation barrier as evidenced by DFT calculation. Rh species were atomically dispersed in the In2O3 matrix and were stable during a long term reaction. Under reaction conditions, the surface Rh atoms were reduced and were stabilized by charge transfer from neighbouring In atoms. Our results show that incorporation of atomic Rh species in In2O3 can lead to high methanol productivity by creation of oxygen vacancies as well as Rh centred active sites for CO2 activation
Punning in Punglish, sounding 'poreign': Daljit Nagra and the politics of language
No full textThis essay explores Daljit Nagra’s poetry (Look We Have Coming To Dover! (2007), and Tippoo Sultan’s Incredible White-Man-Eating Tiger-Toy Machine!!! (2011)) in the context of contemporary British language politics. It argues that Nagra’s approach to language – combining heteroglot, multivoiced experimentalism with an etymological attention to the historical constructedness of language – offers a riposte to monolingual ideologies, which also resituates English as a product and residue of colonial history. While Nagra’s poems sometimes come close to regarding the histories enfolded within English as a linguistic and poetic impasse, they continue to invest in the notion of resistance and individual agency in language; and specifically, they revel in poetic dramatization of the accommodations and convivialities of everyday multilingual language practice
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