1,628 research outputs found

    Applying university strategic objectives at the school level

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    University Teachers at the School of Interdisciplinary Studies are working together on the Teaching, Learning and Participation Project. This project encompasses three strands: widening participation, student experience, and innovative learning and teaching; all key aspects of the University’s strategic objectives. The widening participation strand has focused primarily on partnership with local schools. This includes Campus Days whereby pupils who have the ability, but perhaps not the confidence, to enter higher education come to the University's two campuses and experience a day as a student. Additionally this strand is seeking to conduct a comparative study of assessment and feedback processes in secondary and higher education. The student experience strand has concentrated on employability and internationalisation. Examples include working with the local education authority to extend student learning and provide staff CPD opportunities via the establishment of an annual education lecture, and developing opportunities for internships overseas. Finally, the innovative learning and teaching strand has sought to review current teaching practices within the School, and to identify and trial innovative methodologies in an effort to engage learners more fully and thereby to enhance both the student and staff learning experiences

    40. The gas-phase ammoxidation of n-hexane to unsaturated C6 dinitriles, intermediates for hexamethylenediamine synthesis

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    This paper reports about an investigation on the catalytic gas-phase ammoxidation of n-hexane aimed at the production of 1,6-C6 dinitriles, precursors for the synthesis of hexamethylenediamine. Catalysts tested were those also active and selective in the ammoxidation of propane to acrylonitrile: rutile-type V/Sb and Sn/V/Nb/Sb mixed oxides. Several N-containing compounds formed; however, the selectivity to cyano-containing aliphatic linear C6 compounds was low, due to the relevant contribution of side reactions such as combustion, cracking and formation of heavy compounds.INGLES

    The oxygen-assisted transformation of propane to COx/H2 through combined oxidation and WGS reactions catalyzed by vanadium oxide-based catalysts

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    This paper reports about the gas-phase oxidation of propane catalyzed by bulk vanadium oxide and by alumina- and silica-supported vanadium oxide. The reaction was studied with the aim of finding conditions at which the formation of H2 and CO2 is preferred over that of CO, H2O and of products of alkane partial oxidation. It was found that with bulk V2O5 considerable amounts of H2 are produced above 400 8C, the temperature at which the limiting reactant, oxygen, is totally consumed. The formation of H2 derived from the combination of: (i) oxidation reactions, with generation of CO, CO2, oxygenates (mainly acetic acid), propylene and H2O, all occurring in the fraction of catalytic bed that operated in the presence of gas-phase oxygen, and (ii) WGS reaction, propane dehydrogenation and coke formation, that instead occurred in the fraction of bed operating under anaerobic conditions. This combination of different reactions in a single catalytic bed was possible because of the reduction of V2O5 to V2O3 at high temperature, in the absence of gas-phase oxygen. In fact, vanadium sesquioxide was found to be an effective catalyst for the WGS, while V2O5 was inactive in this reaction. The same combination of reactions was not possible when vanadium oxide was supported over high-surface area silica or alumina; this was attributed to the fact that in these catalysts vanadium was not reduced below the oxidation state V4+, even under reaction conditions leading to total oxygen conversion. In consequence, these catalysts produced less H2 than bulk vanadium oxide

    Electron irradiation effects on superconductivity in PdTe2_2: an application of a generalized Anderson theorem

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    Low temperature (\sim 20~K) electron irradiation with 2.5 MeV relativistic electrons was used to study the effect of controlled non-magnetic disorder on the normal and superconducting properties of the type-II Dirac semimetal PdTe2_2. We report measurements of longitudinal and Hall resistivity, thermal conductivity and London penetration depth using tunnel-diode resonator technique for various irradiation doses. The normal state electrical resistivity follows Matthiessen rule with an increase of the residual resistivity at a rate of \sim0.77μΩ \mu \Omegacm/(C/cm2)(\textrm{C}/\textrm{cm}^2). London penetration depth and thermal conductivity results show that the superconducting state remains fully gapped. The superconducting transition temperature is suppressed at a non-zero rate that is about sixteen times slower than described by the Abrikosov-Gor'kov dependence, applicable to magnetic impurity scattering in isotropic, single-band ss-wave superconductors. To gain information about the gap structure and symmetry of the pairing state, we perform a detailed analysis of these experimental results based on insight from a generalized Anderson theorem for multi-band superconductors. This imposes quantitative constraints on the gap anisotropies for each of the possible pairing candidate states. We conclude that the most likely pairing candidate is an unconventional A1g+A_{1g}^{+-} state. While we cannot exclude the conventional A1g++A_{1g}^{++} and the triplet A1uA_{1u}, we demonstrate that these states require additional assumptions about the orbital structure of the disorder potential to be consistent with our experimental results, e.g., a ratio of inter- to intra-band scattering for the singlet state significantly larger than one. Due to the generality of our theoretical framework, we think that it will also be useful for irradiation studies in other spin-orbit-coupled multi-orbital systems.Comment: 22 pages, 12 figure

    The solvation and dissociation of 4-benzylaniline hydrochloride in chlorobenzene

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    A reaction scheme is proposed to account for the liberation of 4-benzylaniline from 4-benzylaniline hydrochloride, using chlorobenzene as a solvent at a temperature of 373 K. Two operational regimes are explored: “closed” reaction conditions correspond to the retention of evolved hydrogen chloride gas within the reaction medium, whereas an “open” system permits gaseous hydrogen chloride to be released from the reaction medium. The solution phase chemistry is analyzed by 1H NMR spectroscopy. Complete liberation of solvated 4-benzylaniline from solid 4-benzylaniline hydrochloride is possible under “open” conditions, with the entropically favored conversion of solvated hydrogen chloride to the gaseous phase thought to be the thermodynamic driver that effectively controls a series of interconnecting equilibria. A kinetic model is proposed to account for the observations of the open system

    Editorial for the Special Issue on “Multidisciplinary Insights on Bone Healing”

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    : Animal and human bone damage can be considered differently according to a macro- or micro-level analysis [...]

    the occurrence of deep pectoral myopathy in roaster chickens

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    A field study was conducted to determine the incidence of Deep Pectoral Myopathy (DPM) in male roaster chickens reared under intensive conditions, processed at different ages (from 47 to 65d), and belonging to two commercial genotypes (Ross508; Cobb500). The study was carried out in a major Italian processing plant on a total of 120,700 roaster chickens chosen at random from 151 flocks during a 6 months period. The evaluation of DPM was performed on Pectoralis minor muscles and consisted in a visual assessment of the presence/absence of the myopathy as well as the determination of muscle damage level as being in an "early" (hemorrhagic appearance) or "old" (grey/green discoloration) developing stage. The incidence of carcasses affected by DPM was found to be 0.84% (0.62 and 0.22% in early and old stages, respectively). The range in the incidence of total DPM was fairly large and varied from 0.0 to 16.7%. Considerable variations were also observed for early (range: 0.0 to 12,0%) and old (range: 0.0 to 5.6%) developing stages. Considering the effect of genotype, Ross508 exhibited a higher incidence of DPM in respect with Cobb500 roasters (1.27 vs. 0.35%; P < 0.01). This result was due to the higher incidence of carcasses affected by both early (0.94 vs. 0.26%; P < 0.01) and old (0.33 vs. 0.09%; P < 0.01) developing stages of DPM in Ross508 birds. In conclusions, this study has shown that the occurrence of Deep Pectoral Myopathy in male roaster chickens may be economically significant to the industry as a whole
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