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Steroid 투여를 중심으로 한 Burn Toxin에 관한 실험적 연구 : Especially regarding the steroid therapy after burn
黃炫,李英浩 中央醫學社 1974 中央醫學 Vol.27 No.2
The treatment of burn has been progress great deal by fluid therapy in last a couple of decades. There has however not dimminished the mortality of burn patient. This has made many researches to believe in existance of burn toxin. Since this possible existance of burn toxin, numerous papers of burn toxin has been published. Through receiving the papers, it was suggested that there may be certain relation between the toxin and steroid hormone. In order to clarify their relationship between burn toxin and steroid hormone following animal experimental mortality was carried out. Diffusates were collected from subcutaneous air balloon of the back of rats after making third degree burn of the balloon skin at 30 min., 1 hour, 2 hours, 4 hours, 6 hours, 12 hours, 24 hours, 48 hours, and 72 hours interval following burn. The amount of protein in each diffusates was measured. Each diffusate was then injected to the mice intraperitoneally and also steroid injection (5 mg IM) into experimental animal groups. The results are as follows; The protein amount of diffusate was continuously increased by time progressing after burn. The mortality rate of mice intraperitoneally injected the diffusates of experimental rat that has a steroid therapy after burn, has more dimminished than control group.
전해도금에 의한 플립칩 무연 솔더 범프 제조에 관한 연구
黃眩,洪淳泯,姜春植,鄭在弼 대한금속재료학회 2002 대한금속·재료학회지 Vol.40 No.1
The fabrication of Sn-Pb and Sn-Ag solder bump (150 ㎛ diameter, 250 ㎛ pitch) by electroplating was studied for flip chip package. As a preliminary experiment, the effect of current density and plating time on Sn-Pb and Sn-Ag deposit was investigated. The eutectic compositions of Sn-Pb and Sn-Ag were controlled and the Sn-37 wt.%Pb and Sn-3.5 wt.%Ag solder bumps were fabricated in optimal condition of 6A/d㎡, 4hr and 6A/d㎡, 1.5hr, respectively. The shape of humps was observed by SEM and ball shear test after reflow was performed to measure adhesion strength between solder bump and UBM(Under Bump Metallurgy). The shear strength of Sn-Ag bump fabricated by electroplating was higher than that of Sn-Pb.
황현,차영선 고려대학교 의과대학 1973 고려대 의대 잡지 Vol.10 No.3
This study was designed to observe whether the metabolic capacity of renal tissue could be reduced by the effects of a period of induced ischemia. Metabolic studies were performed on slices of rabbit' renal cortex, outer medulla, inner medulla and papillary tip which were incubated in Krebs-Ringer bicarbonate buffer solution. Ischemia was induced by occluding the renal artery or renal vein of the left kidney for an hour, thereafter the occlusion was removed for 30 minutes. The right kidney used as a paired control. Analyses were performed on final media after removal of slices incubation. Glucose was measured by the method of Nelson after deproteinization according to Somogyi, and medium lactate was determined according to the method of Barker and Summerson. The rates of oxygen consumption (QO₂) were measured manometrically in a Warburg apparatus using standard manometric techniques as described by Umbreit et at. The results are summarized as follows : 1. Renal venous occlusion has a more pronounced effect on kidney weight increment than does renal arterial occlusion. 2. Arterial occlusion increases the rate of lactate production significantly in all kidney regions than venous occlusion. 3. Occlusion of either the renal vein or artery reducest he rate of oxygen consumption of all regions in glucose free medium. 4. The reduced rate of oxygen consumption following renal arterial occlusion recovered completely in glucose added medium. 5. Both cortex and medulla appear to be more sensitive to ischemia induced by renal venous occlusion than by renal arterial occlusion. It is inferred from the above results that, at medium oxygen level approximating that believed to exist in vivo, glycolysis in papillary tip. mixed glycolysis and oxidation in inner medulla and outer medulla, and oxidative metabolism in cortex are the major energy-yielding pathways in rabbit kidney.
管狀有莖皮辨(tubed pedicle flap)의 臨床的 考察
黃炫,柳在德 최신의학사 1970 最新醫學 Vol.13 No.4
A total of 15 cases of tubed pedicle flaps treated by us during last 2 years was analized as to the lesion to be reconstructed, selection of donor site, method of flap formation and timing of the pedicle division and transfer. Ten cases out of 15 had extensive defect on the face, 3 had painful B-K amputation stumps, 2 had perineal defect and penile ampution. ,The tubed flaps were formed on the left lower abdomen in 8 cases, left upper arm in 4 cases, right thigh in 3 cases. Six of them used the wrist as carrier to transfer to the facial defects from the left lower abdomen and one transfered by jumping procedure from left lower abdomen to the right painful B-K amputation stump. The fashioning of the tubed pedicle flaps was made with ratio of length to width as 3:I and divided the pedicle about 2 weeks after flap formation. One of 15 cases had the complication of fat necrosis of the tube probably due to tension of the tube.