경식도 심초음파도의 Direct Planimetry를 이용하여 측정한 대동맥판 면적의 심박출량 및 좌심실 구출율의 변화에 따른 정확도

진승원,김종진,김희열,박지원,전두수,윤호중,박준철,노태호,채장성,김재형,홍순조,최규보 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.8

우라늄 이온의 선택흡착

정종헌,김준수,오원진,유재형,유승곤 한국공업화학회 2002 응용화학 Vol.6 No.1

Uranium-containing aqueous wastes have been treated by electrosorption on a carbon electrode composed of activated carbon fibers(ACFs) in a continuous flow-through cell. Effective uranium (VI) removal is accomplished when a negative potential in the range of -0.3 to -0.9V (vs. Ag/AgCI) is applied to the carbon electrode. For a feed concentration of 350mg/l, the concentration of U(VI) in the cell effluent is reduced to less than lmg/l. Electrosorption capacity over 552 mg_uranium/g_ACF is reached.

불소화 상수에 대한 정수기 사용시 불소농도 변화에 관한 연구

김진태,이광수,김종철 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.1

The effectiveness of the fluoride ion in lowering the incidence of dental caries is of major significance to the entire field of dental health. Fluoride of public water supplies has been recognized for many years as an effective way to reduce dental caries. The purpose of this investigation was to determine the effect of several water conditioning systems on the fluoride concentration. A sampling apparatus was constructed to allow collection of water samples before and after conditioning. The apparatus connected the following types of water conditioning systems: a ceramic filter, a silver-carbon filter,an activated carbon filter, a reverse osmosis system and a ultra filter. These samples were tested by using colorimetric determination of fluoride concentration. The results were as follows, 1.The water fluoride concentration of primary school of Chungjcity was 0.793 ± 0.001ppm. 2.Fluoride concentrations after conditioning were 0.183 ±0.016ppm(the reverse osmosis system), 0.231 ±0.051ppm(the activated carbon filter), 0.240 ± 0.031ppm(the ceramic filter), 0.299 ±0.037ppm(the ultra filter) and 0.368 ± 0.030ppm(silvercabon filter). 3.Fluoride concentrations was reduced by the reverse osmosis system(77 ±2%), the activated carbon filter(71 ±6%), the ceramic filter(70 ±4%), the ultra filter(62 ±5%)and silver-carbon filter(54 ±4%). 4.All water conditioning systems tested caused a statistically significant reduction in fluoride(p<0.001).

齒根膜內 痲醉가 成犬의 齒周組織에 미치는 影響

金哲鎭,卞種秀,李相韓 慶北大學校 齒科大學 1985 慶北齒大論文集 Vol.2 No.1

The purpose of this experimental study was to determine if periodontal tissues were damaged by the periodontal ligament injection administered by a pistol-type syringe, and if so, whether there would be subsequent repair. The periodontal ligament injections of 2% lidocaine with 1:100,000 epinephrine or normal saline were performed under the strong back-pressure at various sites on 3 dogs. Injected areas were examined at one hour, twenty-four hours, one week and two weeks postinjection. Histologic evaluation indicated that the disruption was very slight and was confined to the injected periodontal space and adjacent hard tissues. This slight damaged periodontium showed rapid repair, indicting that the periodontal ligament injection results in minor changes on the periodontium. So, the study would indicate that the procedure is safe to the periodontium.

敎師 competence의 評價準據와 評價方法의 開發

邊昌鎭,李慶燮,金昌洙,朴鍾烈 慶北大學校 1984 論文集 Vol.37 No.-

The purpose of this study is to plan the evaluation criteria and methods of teacher competence. With a view to developing a plan to evaluate the teacher competence desirably, we establish the following evaluation format, based on the 17 evaluation formats of teacher competence widely used in the elementary and secondary schools in America recently. 1. Categories and evaluation criteria of teacher competence 1) teaching preparation....evaluation criteria 1-4 2) teaching skill,,,,evaluation criteria 5-11 3) professional ability....evaluation criteria 12-14 4) personal quality....evaluation criteria 15-27 5) classroom management...evaluation criteria 28-31 6) human relationship.....evaluation criteria 32-37 2. Rating scale--1 (Unsatisfactory), 2 (Improvement needed), 3 (Good), 4 (Excellent).

糞尿와 都市 廢棄物과의 混合處理에 대한 硏究 (Ⅰ) : 肥料化를 中心으로한 實驗室的 考察 Experimental study for the fertilization

金熙鐘,金相烈,金秀生,孫晋彦,金燦國,成周慶,吳英敏 동아대학교 환경문제연구소 1977 硏究報告 Vol.1 No.1

우리나라에 있어서 都市廢棄物의 主인 糞尿와 固形廢棄物의 太宗인 無煙炭재를 同時에 效果的으로 處理할 수 있고 또한 堆肥化시킬 수 있는 好氣性 酸化方式의 最適條件을 얻기 위하여 生糞尿 및 煉炭재의 理化學的 및 生物學的 數値를 測定하고 이를 基礎로하여 上記 兩者를 混合處理 할수 있는 消化條件(溫度, 糞尿와 煉炭재의 配合比, 기타 固形物의 添加量, 注入되는 空氣量의 變化)에 따른 C.O.D., B.O.D.의 變化, 水分 및 電氣傳導度의 變化, 熱灼減量, N量의 變化 等을 硏究하였으며 이들 사이의 相關關係를 檢討하여 다음과 같은 結論을 얻었다. 1. 生糞尿에 固形廢棄物인 煉炭재나 紙類를 配合시켜 消化시키므로서 케이크속의 질소成分의 量을 增加 시킬수 있다. 2. 煉炭재의 配合은 糞尿의 消化速度를 增加 시킨다. 3. 糞尿의 處理를 위한 反應槽의 溫度는 50℃보다 60℃로 維持 시킬때 消化速度가 크다. 4. 反應槽의 溫度를 一定하게 했을때 空氣의 注入速度는 初期 反應時는 적게하고 後期 反應時는 크게 함이 效果的 이다. For the effective treatment and usable disposal of urban wastes in the area of Busan city, the composition of the nightsoil and anthracite bulky ash which is the main munic ipal solid wastes have been studied on the digestion of the compositive mixtures with the variable conditions that are ratio of compounding between nightsoil and ash, amount of solid additives and volume of air for the effective airation at 50, 65℃. The digestion has been detected by the physico-chemical and biological data; pH, specific gravity, content of moisture, C.O.D., B.O.D., electroconductance of the solution of the results, decrease of nition, and volume of total free nitrogen etc. The results are obtained as follows. 1) The characteristics of domestic nightsoil are different to the foreign data as table 5, but the data of anthracite ash almost are same except the composition of Fe₂O₃ and Al₂O₃. 2) Amount of total free nitrogen are increased by the digestion with the addition of solid waste, as effective absorption, to the nightsoil. 3) The digestion are accelerated by the compounding of ash, but the adding of sulfuric acid to fix the free ammonia reduced reaction. 4) The airation have to proceed slowly at initial step, and then endure enough volume of air at the later step.

사체신 이식 15예의 결과 분석

곽진영,박찬대,이광수,원치규,강종명,박한철,이춘용,우영남 大韓移植學會 1993 Korean Journal of Transplantation Vol.7 No.1

식도 평활근종이 동반된 Alport 증후군 1례

정진영,김철민,임연정,김자형,유종우,최보화,홍수종,박영서 대한소아과학회 2002 小兒科 Vol.45 No.9

Twin Block을 이용한 Ⅱ급 부정교합의 치료증례

박수진,장기택,김종철 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.1

Twin Blocks are simple bite-blocks that effectively modify the occlusal inclined plane to induce favorably directed occlusal forces by causing a functional mandibular displacement. These devices use upper and lower bite-blocks that engage on occlusal inclined planes. Twin Blocks use the forces of occlusion as the functional mechanism to correct the malocclusion. To get an excellent result in the treatment by using the Twin Block appliances, proper case selection must be needed. Twin Block treatment is performed in two stages. Twin Blocks are used in the active phase to correct the anteroposterior relationship and establish the correct vertical dimension. Once this phase is accomplished, the Twin Blocks are replaced with an upper Hawley type of appliance with an anterior inclined plane, which is then used to support the corrected position as the posterior teeth settle fully into occlusion. The Twin Block is the most comfortable, the most esthetic ane the most efficient of all the functional appliances. Twin Blocks have 24 hours per day and can eat comfortably with the appliances in place. From the moment Twin Blocks are fitted, the appearance is noticeably improved. There is less interference with normal function. Integration with conventional fixed appliances is simpler than with any other functional appliance. Twin Blocks allow independent control of upper and lower arch width. Appliance design is easily modified for transverse and sigittal arch development. The authors treated ClassⅡ malocclusion with Twin Blocks, and the results as follows: 1. Rapid profile improvement was achieved in 2-3 months. 2. There was excellent patient cooperation. 3. Severe overjet and overbite were reduced. 4. Class Ⅱ molar relationship was changed to Class Ⅰ.

동물의 장에서 분리한 Enterococcus sp.의 특성 및 분말화

박종진,변정수,조윤경,홍승서,이현수 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.4

의약품 및 동물약품으로 사용되고 있는 분말유산균을 개발하고자 동물의 장에서 산성 pH 및 담즙산에 대한 내성이 강하고 대장균 생육억제력이 좋은 Enterococcus faecium L20을 분리 동정하고 이를 이용하여 고농도의 생균이 함유된 분말 유산균을 제조하였다. 분리된 균주는 pH 3.0에서 90% 이상의 내성과 0.3% 담즙산이 함유된 배지에서 100%의 내성을 나타냈으며 MRS 배지에서 대장균과 혼합배양시 24시간 이내에 대장균을 사멸시켰다. 분리된 균주를 산업용배지에서 배양한 후 동결건조시켜 분말을 만들었을 때 생균수는 5.0×0^11/g 이상이었다. 이것은 18℃에 보관하였을 경우 11개월 동안 80%의 생존율을 나타내었다. In order to develop a lactic acid bacterial powder which can be used as a probiotic for human and animal, a lactic acid bacteria which has high resistance against low pH and ox-gall, and shows a good growth inhibition against low pH and ox-gall, and shows a good growth inhibition against E. coli, was isolated from an animal intestine and characterized. The isolated strain was identified as Enterococcus faecium. It had more than 90% of survival at low pH for 2 hours and almost 100% of survival in the presence of 0.3% ox-gall. When co-cultured with E. coli in MRS broth, all of the E. coli cells were killed within 24 hours. The final powdered product of the isolated strain was manufactured after a freeze drying process suing an industrial media, and then checked its stability. Its storage stability was 80% for 11 months at 18℃.