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강승민,오근호,Kang, S.M.,Orr, K.K. 한국결정성장학회 1994 한국결정성장학회지 Vol.4 No.1
$YbFeCoO_4$ single crystal was grown by floating zone method. The atmospheric condition of the growth was controlled in air and the growth rate was 1~2 mm/hr. After melting the feed rod of the composition of $YbFeCoO_4$, $YbFeCoO_4$ was decomposed to $YbFeCoO_4$ and CoO phase in the initial state of the growth. The liquid composition, however, changed to the direction of the eutectic point along the liquidus line and then stopped at the point in which $YbFeCoO_4$ single crystal could be grown. The growth direction of the crystal was preferred orientation [110], perpendicular to the c-axis in the hexagonal system due to using the polycrystalline seed. FZ법을 이용하여 $YbFeCoO_4$ 단결정을 성장하였다. 결정 성장은 공기분위기 중에서 이루어졌으며, 성장 속도는 1~2mm/hr로 조절하였으며, 성장 초기는 $YbReO_3$와 CoO로 분해 되었으나 용융 후 액상의 조성이 변화됨에 따라 $YbFeCoO_4$ 단일사의 단결정이 육성되었다.결정의 성장 방향은 c축에 수직으로 성장하였으며 다결정의 종자 결정을 이용하여 용이성장축으로 성장된 결정의 성장 방향은[110]방향이었다.
정제용(J Y Jung),차인호(I H Cha),이충국(C K Yi),강승민(S M Kang),김진(J Kim) 대한구강악안면외과학회 1994 대한구강악안면외과학회지 Vol.20 No.2
It has been widely accepted that distant metastasis of the hepatoma to the other organs so readily occurs that about 50% of cases are discovered to have already been metastatic at an appointement of diagnosis. The prognosis of hepatoma mainly depends on the size, shape and residual function of the liver, and not so much concern was given to the distant metastasis. But recently, by the means of early detection, embolization of hepatic artery and radiotherapy, survival period of the patients is getting longer. And as a result the distant metastasis is more emphasized. Hepatoma metastasizes primarily to lung, and in the order of lymph node in the abdominal cavity, parathyroid gland, and bone. In a few cases, the biopsy of the metastatic area reveals that the primary site is the liver. Primary hepatoma, metastatic to the mouth are and most cases are diagnosed that primary site of occurrence is liver, through the biopsy at the time of visit due to the mass in the oral cavity. In this context, the authors report 2 cases of primary hepatoma which metastasized to the mandible and gingiva. One case, a 60 year old man in 1988, was diagnosed by the biopsy because of the mass in the left mandibular body and the ramus, after that the abdominal ultrasonography and abdominal computerized tomography were done to identify the metastasis of the hepatoma. Resultantly the final diagnosis was primary hepatoma that metastasized to the mandible. And the other case, 61 year old man in 1992, was diagnosed through the intraoral biopsy and hepatocellular aspiration because of the rapidly growing mass on the gingiva. This case was also diagnosed to be a primary hepatoma.