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BAM(Brewster Angle Microscope)으로 관측한 Langmuir막의 상전이에 따른 분자 배향에 관한 연구
조환제,강도원,박태곤 창원대학교 산업기술연구소 2001 産技硏論文集 Vol.15 No.-
In this study, we used Brewster-Angle Microscope(BAM) to study on the molecular orientation of monolayer on the water surface. The domains by behaviors of molecules on three different subphase have been observed. Reproducible π-A isotherm have been obtained only on information about phase transition by molecular area. BAM facilitates the observation of morphology by optical anisotropy and thickness in monolayer and multilayers as BAM is shown to be sensitive to anisotropy of film. Also, the coalescence of domains leads to large regions of uniform tilt-azimuthal direction. Every transition was found by BAM technique, either as a dramatic change in degree of contrast or as a sudden alteration of molecular action and π-A isotherm.
타리비드 정(오플록사신 100㎎)에 대한 파비드 정의 생물학적동등성
박완수,조성희,이헌우,임호택,홍성제,서성훈,류재환,이경태 한국약제학회 2005 Journal of Pharmaceutical Investigation Vol.35 No.1
The purpose of the present study was designed to evaluate the bioequivalence of two ofloxacin tablets, Tarivid (Jell Pharm. Co., Ltd.) and Favid (ILHWA Co., Ltd.), according to the guidelines of Korea Food and Drug Administration (KFDA). Twenty-four normal male volunteers, 23.67±3.12 year in age and 68.50±7.23 kg in body weight, were divided into two groups and a randomized 2x2 cross-over study was employed. After four tablets containing 100 mg of ofloxacin were orally administered, blood was taken at predetermined time intervals and concentrations of ofloxacin in plasma were deter mined using HPLC. Pharmacokinetic parameters such as AUC_(t) and T_(max) were calculated and ANOVA test was utilized for the statistical analysis of the parameters using logarithmically transformed AUC_(t), and C_(max) and untransformed T_(max). There were no sequence effects between two formulations in these parameters. The 90% confidence intervals for the log transformed data were acceptance range of log 0.8 to log 1.25 (e.g., log 0.94-log 1.04 and log 0.90-log 1.07 for AUC_(t) and C_(max) respectively). The major parameters. AUC_(t) and C_(max) met the criteria of KDFA for bioequivalence indicating that Favid tablet is bioequivalent to Tarivid tablet.
Antifungal Activity of Serratia marcescens Chitinases against Phytopathogenic Fungi
CHO, MOO JE,GAL, SANG WAN,HWANG, JAE RYOUNG,SHIN, YONG CHUL,LEE, SANG YEOL 경상대학교 유전공학연구소 1990 遺傳工學硏究所報 Vol.9 No.-
The extracellular chitinase activities of Serratia marcescens were induced by the addition of 1.5% swollen chitin to LB-broth about seven folds compared to that obtained from the culture medium without chitin. S. marcescens was co-cultured with various phytopathogenic fungi, including Phytophtora parasitica, Botryosphaeria oxyaporium in an LB-agar medium containing 1.5% swollen chitin. Fungal hyphae grew rapidly outward from the center, however the hyphal extension of pathogenic fungi was significantly inhibited in a perimetric contract area with S. marcescens. Each of the culture supernatant of S. marcescens, E. coli, or the chitinase of Streptomyces griceus purchased from Sigma was incubated with the mycelium of F. oxysporium as a sole carbon source in a slide glass with single depressiom under the inverted microscope at 30℃. It was observed that the mycelium of F. oxysporium was gradually bursted as the cultivation time increased and completely lysed after incubation for 24 hrs by the chitinolytic activities of S. marcescens. From these data, it was concluded that the chitinolytic activites of S. marcescens play an important role in biocontrol of phytopathogenic fungi.
Long-Term Outcomes After Combined Revascularization Surgery in Adult Moyamoya Disease
Cho, Won-Sang,Kim, Jeong Eun,Kim, Chang Hyeun,Ban, Seung Pil,Kang, Hyun-Seung,Son, Young Je,Bang, Jae Seung,Sohn, Chul-Ho,Paeng, Jin Chul,Oh, Chang Wan American Heart Association, Inc. 2014 Stroke Vol.45 No.10
<P><B>Background and Purpose—</B></P><P>The surgical outcomes of adult moyamoya disease are rarely reported. We aimed to evaluate the long-term outcomes of combined revascularization surgery in patients with adult moyamoya disease.</P><P><B>Methods—</B></P><P>Combined revascularization surgery consisting of superficial temporal artery–middle cerebral artery anastomosis with encephalodurogaleosynangiosis was performed on 77 hemispheres in 60 patients. Clinical, angiographic, and hemodynamic states were evaluated retrospectively using quantitative methods preoperatively and postoperatively in the short-term (≈6 months) and long-term (≈5 years) periods. The mean clinical follow-up duration was 71.0±10.1 months (range, 60–104 months).</P><P><B>Results—</B></P><P>Clinical status improved until 6 months after surgery and remained stable thereafter, as assessed by the Karnofsky Performance Scale and modified Rankin Scale. The revascularization area relative to supratentorial area significantly increased in the long-term period compared with that in the short-term period (54.8% versus 44.2%; <I>P</I><0.001). Cerebral blood flow in the territory of the middle cerebral artery improved in the short-term period compared with that in the preoperative period (68.7 versus 59.1; considering blood flow of the pons as 50; <I>P</I><0.001) and thereafter became stable (65.5 in the long term; <I>P</I>=0.219). The annual risks of symptomatic hemorrhage and infarction were 0.4% and 0.2%, respectively, in the operated hemispheres.</P><P><B>Conclusions—</B></P><P>Combined revascularization surgery resulted in satisfactory long-term improvement in clinical, angiographic, and hemodynamic states and prevention of recurrent stroke.</P>
The natural clinical course of hemodynamically stable adult moyamoya disease
Cho, Won-Sang,Chung, Young Seob,Kim, Jeong Eun,Jeon, Jin Pyeong,Son, Young Je,Bang, Jae Seung,Kang, Hyun-Seung,Sohn, Chul-Ho,Oh, Chang Wan American Association of Neurological Surgeons 2015 Journal of Neurosurgery Vol.122 No.1
<B>OBJECT</B><P>Moyamoya disease (MMD) is a rare cerebrovascular disease and its natural history is still unclear. The authors aimed to investigate the natural course of hemodynamically stable cases of adult MMD, with the analysis of stroke risk factors.</P><B>METHODS</B><P>Two hundred forty-one patients were included in this retrospective study. One hundred sixty-six (68.9%) were female, and mean age (± SD) at first visit was 41.3 ± 12.0 years (range 18-69 years). Unilateral involvement was identified in 33 patients, and 19 patients (7.9%) had a family history of MMD. According to the clinical presentations, patients were classified into hemorrhagic (n = 62, 25.7%), ischemic (n = 144, 59.8%), and asymptomatic (n = 35, 14.5%) groups. The mean duration of follow-up was 82.5 ± 62.9 months (range 7.3-347.0 months).</P><B>RESULTS</B><P>The annual stroke risk was 4.5%, and the annual risks of rebleeding in the hemorrhagic group and recurrent ischemic events in the ischemic group were 4.3% and 3.0%, respectively. There was no significant difference in cumulative stroke risk between the 3 groups (p = 0.461). Risk factors included thyroid disease for overall strokes (HR 2.56, 95% CI 1.16-5.67), initial hemorrhagic presentation for hemorrhagic strokes (HR 2.53, 95% CI 1.24-5.17), and initial ischemic presentation for ischemic strokes (HR 2.69, 95% CI 1.15-6.27). Familial MMD was a common risk factor for all types of stroke. Among the 3 clinical groups, the hemorrhagic group showed the worst clinical status at discharge and at most recent follow-up. Twenty-three patients (9.5%) eventually underwent revascularization surgery.</P><B>CONCLUSIONS</B><P>There was no statistically significant difference in the incidence of stroke in the different clinical groups; clinical status, however, was most severe in patients with hemorrhagic presentation. In patients who experienced stroke during the follow-up period, the stroke type tended to correspond to their initial presentation. Close follow-up is needed in patients with thyroid disease and a family history of MMD.</P>
CHO, MOO JE,GAL, SNAG WAN,KIM, JAE IM,CHOI, YOUNG JU 경상대학교 유전공학연구소 1989 遺傳工學硏究所報 Vol.8 No.-
Proline was observed to be a major osmoprotectant in such plants as rice soybean, tomato, tobacco and radish with 5 to 15 folds increase of proline accumulation in callus state under 300mM salt stress. Therefore the proBA(pro-74) mutant genes from E. coli which synthesize the less sensitive γ-glutamyl kinase, the first enzyme in proline biosynthetic pathway, to proline feed-back inhibition were attempted to introduce into plant cell in order to express the bacterial pro genes and construct salt tolerant plants. The 4.1 kb BgI II fragment of proBA(pro-74) genes were cloned into BgI II site of pGA580, a binary vector for plant cell transformation derived from Ti-plasmid and the recombinant plasmid containing proBA (pro-74) gene was named pGAP16. The proBA (pro-74) gene in pGA16 was expressed in E. coli CSH26 and Agrobacterium tumefaciens A281 under the control of nos promotor. Tomato protoplasts were transformed with A. tumefaciens A281 (pGAP16) or by electroporation with naked pGAP16 DNA. The transformed plant cells were screened with the kanamycin resistance first which originated from pGA580. The kanamycin sensitive wildtype calli of the tomato(Lycopersicon esculentum, L. ev. Ailsa Craig) could be survived in the media containing up to 1.4% NaCl but the kanamycin resistant transformants could be survived in the media containing up to 2.0% NaCl.
製銑製鋼의 經濟的 技術改善 方法과 大型製品의 熱處理 및 精密加工에 關한 硏究 : 一次年度 : 低珪素 高溫熔銑을 利用한 橫吹轉爐鑄鋼製造에 關하여
趙煥從,白勝男,李吉弘,姜朝遠,高濟晩,李炫珪,朴昌宣 조선대학교 생산기술연구소 1984 生産技術硏究 Vol.6 No.2
The construction of cupola was converted to utilize the C_(a)C_(2) and a large number of steel scraps. From this cupola operation, We had a low Si and high temperature molten metals, which had been refined in the side blown converter. The results obtained were as follows. 1. High temperature operation which used C_(a)C_(2) could increase steel scraps (80 %) and decrease coke ratio (3∼4%), therefore S in the molten metals was reduced and the quality of molten cast iron was improved. 2. Since the FeO in slag was low, recovery of Fe was high. 3. The quantity of C in the molten cast iron was suitable for side blown converter. 4. Steel productivity Was increased by the shortening of the refining time. Since Fe loss from belching up could be reduced, recovery of Fe was increased. 5. The used amount of C_(a)C_(3) was reduced by the using of C_(a)C_(2) and the amount of Fe-Si was reduced by low Si-high temperature cupola operation. From the results of 1∼4, it was found economical that we used duplex process of Cupola-side blown converter.