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고일영,최승철,김환,Ko, Il-Young,Choi, Seung-Chul,Kim, Hwan 한국세라믹학회 1993 한국세라믹학회지 Vol.30 No.8
Semiconducting Zn-Ti-Ni-O and Zn-Ti-O system were investigated. The specimens sintered at the temperature between 125$0^{\circ}C$ and 145$0^{\circ}C$ exhibited PTCR effect between -5$0^{\circ}C$ and 35$0^{\circ}C$ with resistivity ration exceeding three decades. Semiconducting Zn-Ti-Ni-O is consisted of two phases, one is n-type ZnO and the other is p-type spinel structure. The mechanism of PTCR effect was explained in relation to the piezoelectric property of ZnO and the residual stress caused by thermal expansion difference between two phases during cooling process.
태아 신장기형 중 Infantile polycystic kidney 1례
고일영(Il Young Ko),정창호(Chang Ho Jung),송진범(Jin Berm Song),서경용(Kyung Young Seo),심재식(Jae Sik Shim) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.9
The infantile polycystic kidney disease is rare fetal urinary tract anomaly. It is inherited with an autosomal recessive pattern and recurrence rate is 25%. The gene locus is on chromosome 6p. The pathogenesis of infantile polycystic kidney is the primary defect of the collecting ducts. The ultrasonographic finding of infantile polycystic kidney is oligohydramnios, bilaterally symmetrical enlarged kidneys with maintenance of their reinform shape. The differential diagnosis with adult polycystic kidney disease is important. The massive enlargement of the kidneys is rarely seen in adult polycystic kidney disease and the examination of the parents and other members of the family is helpful to confirm the adult polycystic kidney disease. If there is severe renal involvements, stillbirth or neonatal death secondary to pulmonary hypoplasia would be developed. If it were diagnosed before viability, termination of pregnancy is recommended. In a fetus at risk, diagnosed after viability, pregnancy termination is also recommended since this condition is uniformly fatal. We present a case of infantile polycystic kidney.