We first successfully synthesized Li1+x−yNb1−x−3yTix+4yO3 (LNT) solid solutions (0.13 ≤ x ≤ 0.18, 0 ≤ y ≤ 0.06) rapidly at 1373 K for one hour under 0.35 MPa by the controlling of air pressure using an air-pressure control atmosphere furnace. The composition is a formation area of a superstructure for LNT, in which the periodical intergrowth layer was formed in the matrix, and where it can be controlled by Ti content. Therefore, the sintering time depended on Ti content, and annealing was repeated for over 24 h until a homogeneous structure was formed using a conventional electric furnace. We clarified the mechanism of the rapid sintering using various microscale to nanoscale characterization techniques: X-ray diffraction, a scanning electron microscope, a transmission electron microscope (TEM), a Cs-corrected scanning TEM equipped with electron energy-loss spectroscopy, and X-ray absorption fine structure spectroscopy.
We report a case of IgG multiple myeloma with selective complete Clq deficiency. The patient was a 75-year-old Japanese womanwho exhibited urticaria on the arm and an absence of serum hemolytic complement activity (CH50). Further studies revealed no vasculitis in the urticaria! lesion but showed selective complete deficiency of Clq without low molecular weight Clq precipitin. Addition of highly purified Clq restored the CH50 level of the patient's serum to normal. It is suggested that this abnormality was a primary Clq deficiency. Wediscussed a relationship between the Clq deficiency and myeloma and reviewed the literature.
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