We show a drastically improved gas–solid reaction between NH3 and LiH by mechanical treatment for LiH, generating a hydrogen gas even at room temperature. The results of x-ray photoelectron spectroscopy showed that the mechanical pretreatment was effective in reducing a hydroxide phase from the surface of LiH. It was also possible to successfully recycle back LiNH2, which is the byproduct of this hydrogen desorption reaction, to LiH under 0.5-MPa H2 flow at 573 K. Thus, the LiH–NH3 system provides a recyclable H2 storage system to generate H2 at room temperature with 8.1 mass% and 4.5 kg/100 L hydrogen capacity.
Maffucci's syndrome (association of multiple enchondromatosis and multiple hemangiomata) is rarely associated with other ectodermal tumors.The present case is the second in literature in which the Maffucci's syndrome is associated with the parathyroid adenoma resulting in primary hyperparathyroidism.Although the cystic lesions of the bone and the ectopic calcifications are common to both diseases, pathogenesis apparently not related. The association of parathyroid adenoma with Maffucci's syndrome suggests the potential involvement of mesenchymal organs in this ectodermal neoplastic disorder.
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