ABSTRACT
Gold and platinum nanocapacitors have been fabricated using a magnetron sputtering technique. TiO2 is used as a dielectric material to separate the metal layers which act as the parallel plates for the capacitors. The thickness for metal films and TiO2 layer is 80 nm and 400 nm, respectively. Capacitance of the nanocapacitors has been measured and dielectric constant of TiO2 calculated. Both capacitance and dielectric constant are observed to have strong frequency dependence.
ABSTRACT
During the 9-year period 1968-76 116 splenectomies were performed at the General Hospital, Nottingham. Of these, 13 (11 per cent) were undertaken for unexplained splenomegaly. In 6 patients a diagnosis was established by the operative procedure (2 with sarcoidosis, 2 splenic cysts, 1 Gaucher's disease and 1 haemangiosarcoma). Histological examination of the excised spleens in the remaining 7 patients showed no specific features. Two of these patients benefited considerably from removal of very large spleens. Another patient died from lymphosarcoma which was diagnosed 21 months after splenectomy. In the remaining 4 patients with mild to moderate splenomegaly, there were no real diagnostic or therapeutic advantages. It is concluded that splenectomy should always be considered in patients with unexplained moderate or gross splenomegaly but it may not be helpful in the patient whose spleen is only midly enlarged.
