5,974 research outputs found
Equine mesenchymal stromal cells and embryo-derived stem cells are immune privileged in vitro
Tomorrow’s accounting and society’s future
Despite the growing trend towards greater corporate accountability and increasing revival of social accounting there remains a significant gap between what organisations do, what they are willing to report, and the rights of society. In this concluding chapter, we consider the realities and myths of social accounting in relation to tomorrow’s accounting and society’s future. The chapter begins with a discussion of accounting as a social and institutional practice. It then moves on to consider the issues raised throughout the book and reflects on how the public sector, third sector, cooperatives and family businesses need to adapt and respond to demands for increased social responsibility and demonstrate this through a social accounting and accountability system. The chapter concludes with a discussion of the changing nature of accountability and social accounting, future directions and potential developments within the social accounting arena
Legal traditions and systems in the Pacific: an overview of challenges and opportunities for legislative reform
Singular Laplacian Growth
The general equations of motion for two dimensional Laplacian growth are
derived using the conformal mapping method. In the singular case, all
singularities of the conformal map are on the unit circle, and the map is a
degenerate Schwarz-Christoffel map. The equations of motion describe the
motions of these singularities. Despite the typical fractal-like outcomes of
Laplacian growth processes, the equations of motion are shown to be not
particularly sensitive to initial conditions. It is argued that the sensitivity
of this system derives from a novel cause, the non-uniqueness of solutions to
the differential system. By a mechanism of singularity creation, every solution
can become more complex, even in the absence of noise, without violating the
growth law. These processes are permitted, but are not required, meaning the
equation of motion does not determine the motion, even in the small.Comment: 8 pages, Latex, 4 figures, Submitted to Phys. Rev.
Initiation and evolution of interstitial leukocytic infiltration in experimental glomerulonephritis
Initiation and evolution of interstitial leukocytic infiltration in experimental glomerulonephritis. Most forms of glomerulonephritis have a significant interstitial leukocytic infiltrate which is associated with disease progression. However, there is little data concerning the timing, initial location, and development of this interstitial component. Therefore, we have addressed these issues in a study of passive accelerated anti-GBM glomerulonephritis in the rat. In this model, interstitial leukocytic infiltration was an early event in the disease process with a significant infiltrate apparent at 12 hours after administration of nephrotoxic serum (NTS). This initial infiltrate was restricted to a perivascular sheath surrounding the hilar arterioles. The sheath infiltrate then spread to include the whole hilar area by day 1, the entire periglomerular area by day 3, and became widespread throughout the cortical tubulointerstitium by day 7. The early sheath infiltrate was composed of macrophages and T cells. Both cell types continued to increase as the infiltrate expanded, and a significant accumulation of activated cells (IL-2R+) was evident from day 7 onwards. There was a highly significant correlation between interstitial macrophage infiltration and renal function impairment, proteinuria, and histologic damage. Interstitial T cell infiltration correlated with proteinuria and histologic damage, while the appearance of immune-activated mononuclear cells (IL-2R+) exhibited a highly significant correlation with all disease parameters. This study demonstrates the importance of the glomerular hilar arteriolar region as a focus for mononuclear leucocytic migration and accumulation which not only affects the structure and function of the glomerulus but subsequently the entire tubulointerstitium
Structure–property insights into nanostructured electrodes for Li-ion batteries from local structural and diffusional probes
Microwave heating presents a faster, lower energy synthetic methodology for the realization of functional materials. Here, we demonstrate for the first time that employing this method also leads to a decrease in the occurrence of defects in olivine structured LiFe1−xMnxPO4. For example, the presence of antisite defects in this structure precludes Li+ diffusion along the b-axis leading to a significant decrease in reversible capacities. Total scattering measurements, in combination with Li+ diffusion studies using muon spin relaxation (μ+SR) spectroscopy, reveal that this synthetic method generates fewer defects in the nanostructures compared to traditional solvothermal routes. Our interest in developing these routes to mixed-metal phosphate LiFe1−xMnxPO4 olivines is due to the higher Mn2+/3+ redox potential in comparison to the Fe2+/3+ pair. Here, single-phase LiFe1−xMnxPO4 (x = 0, 0.25, 0.5, 0.75 and 1) olivines have been prepared following a microwave-assisted approach which allows for up to 4 times faster reaction times compared to traditional solvothermal methods. Interestingly, the resulting particle morphology is dependent on the Mn content. We also examine their electrochemical performance as active electrodes in Li-ion batteries. These results present microwave routes as highly attractive for reproducible, gram-scale syntheses of high quality nanostructured electrodes which display close to theoretical capacity for the full iron phase
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