Catharanthus mosaic virus: A potyvirus from a gymnosperm, Welwitschia mirabilis

A virus from a symptomatic plant of the gymnosperm Welwitschia mirabilis Hook. growing as an ornamental plant in a domestic garden in Western Australia was inoculated to a plant of Nicotiana benthamiana where it established a systemic infection. The complete genome sequence of 9636 nucleotides was determined using high-throughput and Sanger sequencing technologies. The genome sequence shared greatest identity (83% nucleotides and 91% amino acids) with available partial sequences of catharanthus mosaic virus, indicating that the new isolate belonged to that taxon. Analysis of the phylogeny of the complete virus sequence placed it in a monotypic group in the genus Potyvirus. This is the first record of a virus from W. mirabilis, the first complete genome sequence of catharanthus mosaic virus determined, and the first record from Australia. This finding illustrates the risk to natural and managed systems posed by the international trade in live plants and propagules, which enables viruses to establish in new regions and infect new hosts

Jesus Calling the First Disciples: Reading Luke’s Account Through the Lenses of Sensing and Intuition

The Lucan account of Jesus’ calling of the first disciples differs from the dominant and better known Marcan narrative in a number of ways. The Lucan account has been prefaced by an introduction to the person and actions of Jesus and specifically triggered by the miraculous catch of fish that Luke shares with John 21. Drawing on psychological type theory and the SIFT approach to biblical hermeneutics, this study tests the hypothesis that sensing types and intuitive types will see different things in this passage. The theory was tested by inviting a group of 19 clergy and lay members of ministry teams to work in type-alike groups. The data are consistent with the theory

Strangeness Production and Ultrarelativistic Cascades

A two phase cascade, LUCIFER II, developed for the treatment of ultra high energy ion-ion collisions is applied to the production of strangeness at SPS energies $\sqrt{s}=17-20$. This simulation is able to simultaneously describe both hard processes such as Drell-Yan and slower, soft processes such as the production of light mesons, including strange mesons, by separating the dynamics into two steps, a fast cascade involving only nucleons in the original colliding relativistic ions followed, after an appropriate delay, by multiscattering of the resulting excited baryons and mesons produced virtually in the first step. No energy loss can take place in the short time interval over which the first cascade takes place. The chief result is a reconciliation of the important Drell-Yan measurements with the apparent success of standard cascades to describe the nucleon stopping and meson production in heavy ion experiments at the CERN SPS. A byproduct, obtained here in preliminary calculations, is a description of strangeness production in the collision of massive ions.Comment: 10 pages, 5 figure

Low-temperature critical current of Y1-xCaxBa2Cu3O7-delta thin films as a function of hole content and oxygen deficiency

The effects of hole content (p) and oxygen deficiency (delta) on the zero-field critical current density, Jc0, were investigated for high-quality c-axis oriented Y1-xCaxBa2Cu3O7-delta (x = 0, 0.05, 0.10, and 0.20) thin films. Ca was used to introduce hole carriers in the CuO2 planes, independent of the oxygen deficiency in the CuO1-delta chains. Low-temperature Jc0(16K) of these films above the optimum doping were found to be high (> 10^7 Amp/cm^2) and were primarily determined by the hole concentration, reaching a maximum at p ~ 0.185+/-0.005, irrespective of oxygen deficiency. This implies that oxygen disorder plays only a secondary role and the intrinsic Jc0 is mainly governed by the carrier concentration and consequently by the superconducting condensation energy which also peaks at p ~ 0.19 where the pseudogap correlation vanishes

Deeply Christian and serving the common good? A survey of Anglican cathedral provision for schools

The Church of England’s vision for education is generous and seeks to allow the riches of Christian life to overflow throughout schools. The vision is captured by the strapline ‘Deeply Christian, serving the common good’. The present study assesses the contribution made to service this vision by the 43 Anglican cathedrals within England and the Isle of Man. Drawing on a careful analysis of information presented by the websites of these cathedrals, the study concluded that all 43 Anglican cathedrals dedicated considerable space on their websites to a regular programme of teaching and learning provision across the age range from early years foundation stage to sixth-form, relevant to a range of curriculum areas, and giving attention to pupils’ personal development and well-being

Anglican cathedrals as ‘episcopal centres of learning’? A survey of current educational provision

Metaphors were introduced to the science of cathedral studies by Muskett in her book, Shop window, flagship, common ground. Such metaphors have the power to inform and shape the perception of cathedrals, but lack theological or ecclesial authority. Gary Hall’s analysis of The purpose of cathedrals offers a different approach to cathedral metaphors when he roots the purpose of cathedrals in the episcopal ordinal: cathedrals are mandated to do what bishops are called to be, by virtue of displaying the activities of the bishop’s cathedra. Central to these activities, exemplifying the bishop’s role as teacher, cathedrals serve as Episcopal centres of learning. Drawing on a careful analysis of information presented by the websites of the 43 Anglican cathedrals within England and the Isle of Man, the current study demonstrated that, like Anglican church schools, as Episcopal centres of learning, Anglican cathedrals offer educational provision that exemplifies a theology of nurture (concerned with the formation of Christian disciples) and educational provision that exemplifies a theology of service (concerned with supporting and serving the wider community)

Proton-proton bremsstrahlung below and above pion-threshold: the influence of the Δ\Delta-isobar

The proton-proton bremsstrahlung is investigated within a coupled-channel model with the $\Delta$ degree of freedom. The model is consistent with the $NN$ scattering up to 1 GeV and the $\gamma N\Delta$ vertex determined in the study of pion photoproduction reactions. It is found that the $\Delta$ excitation can significantly improve the agreements with the $pp \rightarrow pp\gamma$ at $E_{lab}=280$ MeV. Predictions at $E_{lab}=550$ and $800$ MeV are presented for future experimental tests.Comment: 26 pages Revtex, 12 figures are available from the authors upon request ([email protected]

Thermal Stabilization of the HCP Phase in Titanium

We have used a tight-binding model that is fit to first-principles electronic-structure calculations for titanium to calculate quasi-harmonic phonons and the Gibbs free energy of the hexagonal close-packed (hcp) and omega crystal structures. We show that the true zero-temperature ground-state is the omega structure, although this has never been observed experimentally at normal pressure, and that it is the entropy from the thermal population of phonon states which stabilizes the hcp structure at room temperature. We present the first completely theoretical prediction of the temperature- and pressure-dependence of the hcp-omega phase transformation and show that it is in good agreement with experiment. The quasi-harmonic approximation fails to adequately treat the bcc phase because the zero-temperature phonons of this structure are not all stable

Biogeochemical processes in the active layer and permafrost of a high Arctic fjord valley

Warming of ground is causing microbial decomposition of previously frozen sedimentary organic carbon in Arctic permafrost. However, the heterogeneity of the permafrost landscape and its hydrological processes result in different biogeochemical processes across relatively small scales, with implications for predicting the timing and magnitude of permafrost carbon emissions. The biogeochemical processes of iron- and sulfate-reduction produce carbon dioxide and suppress methanogenesis. Hence, in this study, the biogeochemical processes occurring in the active layer and permafrost of a high Arctic fjord valley in Svalbard are identified from the geochemical and stable isotope analysis of aqueous and particulate fractions in sediment cores collected from ice-wedge polygons with contrasting water content. In the drier polygons, only a small concentration of organic carbon (<5.40 dry weight%) has accumulated. Sediment cores from these drier polygons have aqueous and solid phase chemistries that imply sulfide oxidation coupled to carbonate and silicate dissolution, leading to high concentrations of aqueous iron and sulfate in the pore water profiles. These results are corroborated by δ34S and δ18O values of sulfate in active layer pore waters, which indicate the oxidative weathering of sedimentary pyrite utilising either oxygen or ferric iron as oxidising agents. Conversely, in the sediments of the consistently water-saturated polygons, which contain a high content of organic carbon (up to 45 dry weight%), the formation of pyrite and siderite occurred via the reduction of iron and sulfate. δ34S and δ18O values of sulfate in active layer pore waters from these water-saturated polygons display a strong positive correlation (R2 = 0.98), supporting the importance of sulfate reduction in removing sulfate from the pore water. The significant contrast in the dominant biogeochemical processes between the water-saturated and drier polygons indicates that small-scale hydrological variability between polygons induces large differences in the concentration of organic carbon and in the cycling of iron and sulfur, with ramifications for the decomposition pathway of organic carbon in permafrost environments

Enhancing inclusivity and diversity among cathedral visitors: the Brecon Jazz Festival and psychographic segmentation

A series of previous studies concerned with the psychographic segmentation of visitors to six cathedrals across England and Wales, employing psychological type theory, reported highly similar results, suggesting that cathedrals had a well-defined, but somewhat restricted appeal. Several cathedrals are attempting to widen their appeal by engaging a variety of events or exhibitions. Taking one specific example, the Brecon Jazz Festival, the present study found that 196 visitors to Brecon Cathedral during this period differed significantly from the standard psychological type profile of cathedral visitors in two ways. There were significantly more intuitive types (41% compared with 28%) and significantly more perceiving types (27% compared with 20%). These findings demonstrate that specific events have the capacity to widen the psychographic appeal of cathedrals