Study of laser megajoule calorimeter's thermal behaviour for energy measurement uncertainty optimisation Rev. Sci. Instrum. 84, 014902 (2013) Impedance spectroscopy on ceramic materials at high temperatures, considering stray fields and electromagnetic noise Rev. Sci. Instrum. 84, 015118 (2013) An apparatus for concurrent measurement of thermoelectric material parameters Rev. Sci. Instrum. 84, 013907 (2013) Casimir probe based upon metallized high Q SiN nanomembrane resonator Rev. Sci. Instrum. 84, 015115 (2013) Four-electrode impedance spectrometer for investigation of solid ion conductors Rev. Sci. Instrum. 84, 013902 (2013) Additional information on Rev. Sci. Instrum. The implementation of the van der Pauw (VDP) technique for combined high temperature measurement of the electrical resistivity and Hall coefficient is described. The VDP method is convenient for use since it accepts sample geometries compatible with other measurements. The technique is simple to use and can be used with samples showing a broad range of shapes and physical properties, from near insulators to metals. Three instruments utilizing the VDP method for measurement of heavily doped semiconductors, such as thermoelectrics, are discussed.
Hand transplantation is a form of composite tissue allotransplantation, whereby the hand of a cadaveric donor is transferred to the forearm of an amputee. The aim of such a procedure is to achieve better outcomes in terms of functionality and appearance when compared with prosthetics. The microsurgical techniques required have been well established for many years. In addition, advances in immunosuppressive therapy have meant that hand transplantation is a feasible therapeutic option. However this is not a life-saving procedure, requiring lifelong antirejection treatment with potentially serious side-effects. Hand transplantation is therefore a controversial concept with ethical, financial and psychological implications that need careful consideration. Before this treatment can be fully accepted, further research is still required; this should be directed towards achieving immunological tolerance, while minimizing costs and potential side-effects of post-transplant therapy.
Aqueous, 0.1 M 1,1,3,3-tetramethylguanidine was shown to be an active alkaline liquid electrolyte (without metal cations) using a polycrystalline platinum electrode. Cyclic voltammetry reveals that the electrolyte supports − OH conductivity, showing many platinum redox features observed in traditional electrolytes. Gradual reaction with H 2 O decreases ionic conductivity over several months. Oxygen reduction curves in TMG lack a distinct transition from kinetic to diffusion-limiting behavior due to organic adsorbates. Results ultimately show that tetramethylguanidine could be developed as an alternative to NaOH/KOH for enhancing ionic conductivity of alkaline anion exchange membranes of similar composition.
Tables S1-3 provides estimation of the influence of TMGH electrolyte on electron transfer numbers, described according to the regions of Figure 8 of the main text:
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