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서유성,김동진,박종석,임수재,나수균,최창욱 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2
Dislocation is one of the serious complications in total hip replacement arthroplasties. The purpose of this study is to evaluate the risk factors of dislocation, including age, sex, preoperative diagnosis and bilaterality, history of previous hip surgery, positioning of component, soft tissue tension, treatment after dislocation or redislocation. Authors reviewed 190 patients of total hip replacement arthroplasty, which were performed from Jan. 1990 to Dec. 1996. 15 cases developed dislocation after surgery. Incidence of dislocation was 7.89%(15 of 190 cases). Dislocation after revision was not happened(0 of 18 cases). Inclination of acetabular cup was average 37.5° (range: 31° - 43° ). Average anteversion of the acetabular component was 18.1" by Woo and Morrey method, 11.4° by Hassan method. They were normal range except 3 cases. Dislocation was not prevented even though inclination and anteversion of acetabular cup were within normal range. Soft tissue tension is determined by change of limb and femoral neck length. Average limb length difference was -0.2mm(range; -l0mm - +10mm) and average offset difference was +1.7mm(range;-4mm - +18mm). Revision must be accomplished as soon as possible when limb shortening happen by upward migration of the acetabular component. In conclusion, anteversion of acetabular cup may be most important factor in our cases, so cup position must be fixed in proper position during operation.
李承務,趙英一,任侑鎭 연세대학교 대학원 1977 延世論叢 Vol.14 No.2
This investigation was carried out in order to remove the hazardous inorganic metallic ion such as Cu (II) in waste Irater by the technique of ionic flotation with a surfactant, DBS. Cu (II) was removed at top of the column, in which Cu (II) being attached on the surfaces of buffles rising from the air distributor at the bottom of a vertical column. In this experiment, when feed position leas positioned at the midpoint of foam height, the formate and the DBS concentration in the drain were reduced with increasing foam height. The Cu (II) concentration in the drain was also reduced in proportion to the logarithm of air flow rate. From the experimental result, the removal ratio, Cu (II) in the formate to that in the feed, E, was related to the DBS concentration in the feed, Cfd, Cu (II) concentration in the feed, Cfc, andair flow rate, G, as the following empirical equation: E= 0.123 (Cfd/Cfc) +0.148 ln (G/100)
Yim, Su Youn,Lee, You Jin,Lee, Yoen Kyung,Jung, Seung Eun,Kim, Ji Ha,Kim, Hak Jin,Son, Beung Gu,Park, Young Hoon,Lee, Young Guen,Choi, Young Whan,Hwang, Dae Youn D. A. Spandidos 2009 MOLECULAR MEDICINE REPORTS Vol.2 No.5
<P>Lignans isolated from Schisandria chinensis have been prescribed as anti-cancer and anti-hepatitis treatments in Chinese medicine. To investigate the applications of lignans isolated from Schisandria chinensis in hepatic carcinoma therapy, their apoptotic ability was screened using a cell proliferation assay. Compared to the other lignans, gomisin N induced high apoptotic levels in hepatic carcinoma. Cell morphology and flow cytometric analysis demonstrated that this lignan induced cell death at high concentrations, but did not induce any changes at low concentrations. In addition, the expression levels of Bcl-2 and Bax proteins, which are involved in the apoptotic pathway, were markedly increased in only the 320 ?M-treated group compared to the vehicle and other concentration groups, while the expression level of p53 protein remained unchanged in this group. These results suggest that gomisin N is an anti-cancer drug candidate capable of inhibiting the proliferation and inducing the apoptosis of human hepatic carcinomas.</P>
균질화처리한 AZ31-xCa(x=0~2.0 wt.%) 중력 주조재의 열간압연 특성
임창동,유봉선,김수현,이진수,김완철 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.6
The effects of homogenization on hot rolling properties of gravity cast AZ31-xCa (x=0-2.0 wt.%) alloys were evaluated by examination of surfaces and microstructures of sheets. The side cracking during hot rolling was decreased by homogenization through the elimination of local inhomogeneity and solution of brittle precipitate into matrix. The coarse grains in raw materials were changed to fine grains with the average particle size of 5-10 μm by repeated hot rolling through the dynamic recrystallization. A deformation twinning was more favorably formed in the hot-rolled sheets after homogenization. It is considered that the grains grow and the precipitates are solved into the matrix during homogenization heat treatment, which results in the increased possibility of formation of deformation twinning during hot rolling. (Received March 29, 2004)