Properties of 2 or 3 terminal element used ZnO powder for a high electric power device

Since an arrester which consists of a sinter material of ZnO powder,has a nonlinear property,it is used widely for the protection the surge voltage in electric power transmission lines. This property is also expected useful for high power elements. We examine the high temperature properties of 2 or 3 terminal element consisted of ZnO and BaO mixed powder layer with 2 or 3 electrodes. It is found that 2 terminal element consisting of ZnO and BaO mixed layers shows almost the same break down property at the temperature above 350℃ as that of thyrister (Silicon controlled rectifier).酸化亜鉛粉末の焼結材料からなる避雷器は非線形の特性を持つので，これは送電線のサージ電圧を防ぐために広く使用されている。この特性は大電力用素子に利用できることが期待できる。我々は酸化亜鉛粉末と酸化バリウム粉末の2層から成り，2つおよび3つの電極を持つ2端子および3端子素子の特性を温度を高くした状態で調べた。酸化亜鉛粉末と酸化バリウム粉末の2層から成る2端子素子は，350℃以上の温度で，サイリスター(SCR)とほとんど同じブレークダウン特性を示すことが分かった

工作機械の熱変形に関する研究 : 堆積した切りくずによる影響

conference pape

A Case of paraganglioma of Urinary Bladder

A 66-year-old woman was referred to our hospital because a bladder tumor was detected by abdominal ultrasonography. Although she was asymptomatic, cystoscopy showed the nodular sessile tumor in the bladder. We performed transurethral resection of the bladder tumor (TURBT) and histological examination revealed paraganglioma of the urinary bladder. Computed tomography (CT) and metaiodobenzylguanidine (MIBG) scintigraphy did not reveal any other lesions of paraganglioma. One month later, we performed a second TURBT, but the histological examination revealed no residual tumor. She has been followed up for 3 years after operation without any evidence of recurrence. Paraganglioma of the urinary bladder originates from chromaffin tissue of the sympathetic nervous system associated with the urinary bladder wall. For bladder submucosal tumor, we should consider bladder paraganglioma. And second TURBT is a useful option for the evaluation of the residual tumor

Chemical Synthesis of Glycoproteins Having Complex Type Oligosaccharides

departmental bulletin pape

Clinical statistics on the patients operated at the Department of Urology, Kinki University Hospital during three years from 1987 to 1989

A statistic survey was made on the patients undergoing operations between January, 1987 and December, 1989

穀物種子の水溶性多糖に関する研究

論文(Article)departmental bulletin pape

<論説>地方創生を学ぶ「６次産業化」ゲームの実践試行

departmental bulletin pape