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만성신부전 환자에서 발생한 기무라씨 질환에 의한 급성신부전 1예
장윤식,김창환,안석주,방병기,박철휘,장데레사 대한신장학회 1998 Kidney Research and Clinical Practice Vol.17 No.6
Kimura's disease is a granulomatous disease which develops in the skin, subcutaneous tissues and lymph nodes and is characterized histologically by the presence of lymphoid follicles, vascular proliferation and infiltration with eosinophils. The disease shows geographical predilection to Japan, China and South East Asia. The exact etiology and pathogenesis remain uncertain. Some patients had proteinuria or nephrotic syndrome. We have recently experienced the superimposed oliguric acute renal failure associated with Kimura's disease in a male patient with chronic renal failure who had been managed conservatively. Inguinal lymph node biopsy revealed Kimura's disease. He recovered from acute renal failure after being treated with hemodialysis and prednisolone. Lymphadenopathy and fever subsided with steroid treatment. We report a case of Kimura's disease which was comp- licated by acute renal failure in the patient with chronic renal failure.
연소합성법에 의한 Plasma-arc Deposit 용 $Cr_3C_2$ 합성 및 특성에 관한 연구
장윤식,윤정아,이윤복,박성수,김인술,박흥채,오기동 한국세라믹학회 1996 한국세라믹학회지 Vol.33 No.11
Using Cr2O3 Al and graphite powders as starting materials Cr3C2 was synthesized by combustion synthesis process according to the following reaction : 3Cr3C2 +4C+6Allongrightarrow2Cr3C2 +3Al2O3. The synthesis was conducted at 2 atm in an argon atmosphere. in this study main-product was monolithic phase of Cr3C2 /Cr7C3 mixture and sub-product was slag state of $\alpha$-Al2O3. Single phase of Cr3C2 was obtained when crushed main-product was heat-treated at 120$0^{\circ}C$ for 3h in vacuum state with addition of 2.5wt% C. The obtained Cr3C2 powder can be used as plasma-arc deposit material because the flowability index of powder with the size of 9-50${\mu}{\textrm}{m}$ was 66.
o-Xylene-ethylacetate 혼합용매를 이용한 초산수용액의 액-액평형에 관한 연구
장윤식,이진우,박동원 동아대학교 생산기술연구소 1999 生産技術硏究所硏究論文集 Vol.4 No.1
Due to the rising cost of energy, new separation processes based on extraction are becoming more attractive than before. The phase equilibria of quaternary liquid-liquid extraction(LLE) system composed o-xylene-water-acetic acid-ethylacetate was investigated. The purpose of this study is to determine and describe LLE data for the quaternary system containing acetic acid aqueous solution and solvent at 25℃. We investigated that the selection of the optimum solvent to separate acetic acid from aqueous solution. The distribution and selectivity for quaternary system o-xylene(1)-water(2)-acetic acid(3)-ethylacetate(4) are increased with addition of o-xylene. These experimental tie-line data are also compared with the values predicted by UNIFAC model. It is shown that UNIFAC model is capable of predicting the tie-line in these quaternary systems within an average root mean square deviation of 4.07㏖%.
연소합성법에 의한 $MoSi_2-Al_2O_3$ 복합재료의 특성에 미치는 $Mo/MoO_3$ 몰비의 영향
장윤식,이윤복,김용백,김인술,박흥채,오기동 한국세라믹학회 1996 한국세라믹학회지 Vol.33 No.11
MoSi2-Al2O3 composites were prepared by thermal explosion mode of self-propagating high temperature syn-thesis (SHS) using element powders of MoO3 Mo Si and Al. The combustion products of MoSi2 which have 10, 20, 30 and 40 wt% Al2O3 showed the molten state in the range of Mo to MoO3 6:1-9.5:1, 2:1-8:1, 1:1-5:1, and 1:1-3:1 (molar ratio) respectively. The combustion products which made least seperation the molten phase from the slag phase were in Mo/MoO3=9, 5:1, 8:1, 5:1 and 3:1 (molar ratio) respectively. Particles size of MoSi2 and Al2O3 in the combustion product were decreased as the molar ratio of Mo to MoO3 increase. By XRD analysis only MoSi2 and $\alpha$-Al2O3 peaks were identified in the combusion products, In case of MoSi2 containing 20wt% Al2O3 5.1wt% Al existed into MoSi2 grains and 30.7wt% Si and 7.7wt% Mo existed into Al2O3 grains. The relative density of MoSi2 containing 10, 20, 30 and 40 wt% Al2O3 were 82.7, 85.2, and 81.9% respectively. The fracture strength of MoSi2-Al2O3 composites increased with increasing Al2O3 and that of MoSi2-20wt% Al2O3 composite was 195 MPa.