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최준식,유재신,박용채,이진환 朝鮮大學校 1997 藥學硏究誌 Vol.18 No.2
This study was attempted to investigate the pharmacokinetic interaction between sodium valproate (4. 8. 16 ㎎/㎏. i.v.) and phenytoin (4 ㎎/㎏. i.v) in rabbits. The plasma concentration and area under the curve (AUC) of phenytoin were increased significantly (p<0.05. p<0.01) when coadministered with sodium valproate (4. 8. 16 ㎎/㎏) in rabbits. The volume of distribution and total body clearance of phenytoin were decreased significantly (p<0.05. p<0.01) when coadministered with sodium valproate (8. 16 ㎎/㎏) in rabbit. From the results of this experiment. it is desirable that dosage regimen of phenytoin should be adjusted and therapeutic drug monitoring should be performed for reduction of side or toxic effect when phenytoin will be coadministered with sodium valproate in clinical use.
崔甲晟,徐在信 順天大學校 1985 論文集 Vol.4 No.1
One of ficin, isolated from Fig latex, was conducted to investigate some chemical properties of enzyme. The results are as follows; 1. The activity of crude ficin was 2.3 unit/mg and milk clotting activity was 8.33x10-²unit/mg 2. The hydrolytic activity to substrate was 6.8%, which is thought to be of low value. 3. While activities of enzyme after adding 10?? Mcysteine and those concentration of 2-mercaptoe thanol were high. 10-³M-Na₂S₄O?? was the strongest inhibitor among others. 4. The value of enzyme activity was the highest when the concentration of casein solution was 3%.
몇가지 작물중 침투성 살충제 Carbofuran의 잔류량 분석
이재구,최신종,경기성,안기창,권정욱 충북대학교 농업과학기술연구소 1999 農業科學硏究 Vol.16 No.-
In order to ascertain the safety of the systemic insecticide carbofuran - treated crops. garlic, peanut and potato were collected randomly from markets near the major producing farms and analyzed for the residues of carbofuran and its main metabolite, 3-hydroxycarbofuran. The in vitro metabolism of carbofuran in phosphate buffer extracts of the crops was investigated. The results obtained were as follows. 1.The recoveries of carbofuran and 3- hydroxycarbofuran from the spiked samples were 92~ 100% in all samples. The detection limit and minimum amount of carbofuran detected were 0.02ppm and 0.1ng, and those of 3-hydroxycarbofuran 0.06ppm and 0.3ng, respectively. 2.Two mature garlic samples out of 20 contained 0.13 and 0.07ppm of carbofuran, respectively, showing a detection frequancy of 10%. The residue level was less than the maximum residue limit(0.5ppm) set by the health authorities in Korea. Only one mature garlic sample out of 20 contained 0.13ppm of 3-hydroxycarbofuran. 3.The residues of carbofuran and 3-hydroxycarbofuran in the immature garlic, peanut and potato samples were less than the detection limits. 4.The application of carbofuran to the fields of garlic, peanut and potato would be safe, considering that the estimated maximum acceptable daily intake of carbofuran from garlic was 0.0007mg which is 0.13% of the maximum acceptable daily intake(0.55mg) . 5.Carbofuran was hydrolyzed in vitro mainly to carbofuran phenol(m/z 164) in phosphate buffer extracts of the three crops in contrast to the major oxidative metabolism in situ. The amount of the metabolite increased with the incubation time.
열간 단조용 금형강 SKD61의 열처리에 따르는 기계적 성질의 변화
이찬규,최영선,윤재홍,조대현,신희권 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-
The best heat treatment conditions for improving mechanical properties was invastigated about effecting of solution treatment and tempering temperature in various condition of SKD61. The mechanical property of SKD61 has been studied by tensile, hardness and sharphy test, and observation microstructure.
폐전선 피복재 건류탄을 이용한 제강분진처리를 위한 기초연구
황용길,이상화,이성룡,정석수,최재신,조충형 東亞大學校 1995 東亞論叢 Vol.32 No.-
Distilled carbon from waste electric wire coated by vinyl is used to recover valuable metal such zinc, lead and iron in dust. Pemeability and compressive tests are who done to present basic data on extraction of zinc in dust. Experimental results obtained from sintering property of steelmaking dust, distilled carbon from waste electric wire coated by vinyl and waste pulp sludge mixture briquet at various sintering temperature are as followings; Permeability is increased as increasing distilled carbon and pulp amount at higher temperature than room temperature condition. Compressive strength at room temperature is increased as increasing distilled carbon and decreasing waste pulp amount, but decreased as increasing temperature and waste pulp amount. Weight Loss reaction experiment is increased a increasing distilled carbon and waste pulp amount. ZnO and Fe₃O₄ are obtained from sample containing ZnO, Fe₂O₃ and ZnO at 800℃. Permeability test at 500℃ and 800℃ did not well, because of 13.3% CaO in distilled carbon. Sample because semmi melted state at 1000℃. Distilled carbon obtained from waste electric wire showed effect of reduction and flux material.