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Neodymium is one of the more critical rare earth elements with respect to current availability and is most often used in high performance magnets. In this paper, we compare the virgin production route of these magnets with two hypothetical recycling processes in terms of environmental impact. The first recycling process looks at manual dismantling of… (More)
The Ca2+-sensitive photoprotein aequorin and the Ca2+-dependent fluorescent indicators quin 2 and TnCDANZ have been used to investigate contractile processes in single crustacean muscle fibres. The investigations with quin 2 indicate that the free Ca2+ rises to a maximum value before peak force as with aequorin light (approximately 200 msec delay at 12… (More)
A novel triptycene-based polymer of intrinsic microporosity (Trip-PIM) displays enhanced surface area (1065 m2 g(-1)) and reversibly adsorbs 1.65% hydrogen by mass at 1 bar/77 K and 2.71% at 10 bar/77 K.
We demonstrate, through structural refinement from synchrotron X-ray diffraction data, that the mechanism of the transformation between lithium amide and lithium imide during hydrogen cycling in the important Li-N-H hydrogen storage system is a bulk reversible reaction that occurs in a non-stoichiometric manner within the cubic anti-fluorite-like Li-N-H… (More)
The challenge of storing hydrogen at high volumetric and gravimetric density for automotive applications has prompted investigations into the potential of cryo-adsorption on the internal surface area of microporous organic polymers. A range of Polymers of Intrinsic Microporosity (PIMs) has been studied, the best PIM to date (a network-PIM incorporating a… (More)
Porous materials adsorb H2 through physisorption, a process which typically has a rather low enthalpy of adsorption (e.g. ca. 4 to 7 kJ mol(-1) for MOFs), thus requiring cryogenic temperatures for hydrogen storage. In this paper, we consider some of the issues associated with the accurate characterisation of the hydrogen adsorption properties of microporous… (More)
We report the discovery of a new, chemical route for 'activating' the hydrogen store MgH2, that results in highly effective hydrogen uptake/release characteristics, comparable to those obtained from mechanically-milled material.
The physical location of the sites for Ca2+ release, triggering the contraction of a muscle fibre, is a key issue in understanding tbe physiological control mechanisms of excitation-contraction (EC) coupling [l]. The isolation of the ryanodine receptor from rabbit SR fractions  shows the terminal cistemal SR to contain ryanodine-sensitive Ca channels… (More)
Dear Sir , In accordance with the requirements of the degree of Electrical Engineering, I present the following thesis entitled " The Use of Pseudo Random Noise Signals in the Excitation System of Synchronous Machines to Identify their Parameters ". that the work submitted in this thesis is my own, except as acknowledged in the text, and has not been… (More)