Fenton산화에 의한 쓰레기 埋立場 浸出水의 處理

김선희,이병대,김세정,이철희 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.1

This study was aimed to investigate treatment feasibility of leachate from landfill that was located in Bancheung-Dong Kyungbuk Talsung-Kun. From the analytical results of leachate, high concentration of organic and nonbiodegradable matters was contained. It could not be treated by biological process only thus required a combined treatment able to high rate COD removal efficiency. Two types of Fenton's oxidation were adapted in this study. The first one is pre treatment before biological treatment. The second one is post treatment after biological treatment. Thus, the optimal conditions in both methods were investigated. From the survey of treatment conditions, in case of pre treatment, the optimal condition was ?? 0.1, ?? 27.08, pH 3, temperature 30℃ and reaction time 2 hr. On the other hand, ?? 0.14, ?? 57.42, pH 3, temperature 30℃ and reaction time 1.25 hr was obtained for post treatment as optimal conditions. In the above optimal conditions, high COD removal efficiency was shown in pre and post treatment. Also it can be expected that nonbiodegradable matters are degraded and converted to biodegradable matters.

南部地方에 있어서 일본전나무의 造林的 特性에 關한 硏究

權泳徹,金佑龍,金在慶,姜大哲,박명안 진주산업대학교 1978 論文集 Vol.16 No.-

本 硏究는 일본전나무와 他樹種 (삼나무, 편백, 리기다소나무)과의 旣成林分의 生長量을 比較하여 經濟的인 造林奬 勵樹種으로서의 適否를 밝히고자 일본건나무에 對한 植栽地調査, 種苗에 關한 特性調査, 旣成林分에 對한 立地 및 林況調査 (氣象調査, 土壤調査, 林況調査) 및 生長量調査 等을 實施하여 南部地方에 있어서 일본전나무의 造林的 特性에 關한 資料를 얻고자 本 硏究를 實施하였는데 그 結果를 要約하면 다음과 같다. 1. 일본전나무에 대한 種子의 品質檢定을 實施한바 種子의 收得率은 16.66%, 純量率 90.38%, 發芽率 25.25% 및 效率 22.82%로 調査되었다. 2. 일본전나무의 苗令別 生長을 調査한 結果 1-0苗는 幹長 5.3㎝, 根元徑 0.15㎝ 2-0苗는 幹長 12.4㎝, 根元徑 0.37㎝, 2-1苗는 幹長 16.8㎝, 根元徑 0.53㎝ 2-2苗는 幹長 23.4㎝, 根元徑 0.78㎝이었다. 3. 樹高生長에 있어서 일본전나무는 10年生까지는 緩慢한 成長을 보이다가 그 以后부터는 急成長을 나타내었으며, 55年生때 편백 15.06m 삼나무 17.2m인데 일본전나무는 17.2m로 나타났으며, 55年生 以后에는 일본전나무가 他樹種에 比하여 월등히 優勢한 樹高生長의 趨勢를 보여주고 있다. 4. 材積生長에 있어서 일본전나무는 25年生까지는 緩慢한 成長을 보이다가 그 以后부터는 急成長을 하였으며, 35年生에 와서 편백 0.0590㎥, 삼나무 0.0902㎥인데 일본전나무는 0.1039㎥로 나타났다. 5. 일본전나무는 樹高生長과 材積生長이 삼나무나 편백에 比해 相當히 優勢하고 比較的 耐寒性이 强한 편이며 本調査地域의 氣象條件은 硏平均氣溫 13.33∼15.05℃, 關係濕度 72.17∼79.42%, 年降水量 900.6∼2,006.2㎜로 나타났으며, 地況條件은 土壤은 壤土 및 埴壤土, 土深은 깊은 편이며 濕度는 適當한 편으로 地位는 上에 屬하였으므로 이와 類似한 立地條件을 形成하고 있는 南部地方에 있어서 造林奬勵樹種으로 價値가 있다고 判斷된다. This study was conducted to investigate the silvicultural characteristics of momi-fir (Abies firma Siebold et Zuccarini) on the southern part of korea t pursue the suitability for the economical promote species of silviculture comparing with the growth increment of momi-fir and the other species(Japanese-cedar, Hinoki cypress and pitch pine), and for that reason this survey studied the growth increment of momi-fir and the other species, the conditions of location (meteorological survey, soil survey) and stand description. This results obtained were as follows; 1. There were shown 16.66% as yield of seed, 90.38% as purity percentage, 25.25% as germination percentage and 22.82% as efficiency percentage by the quality test of momi-fir seed. 2. 1-0 nursery stock was shown 5.3㎝ stem height, 15㎜ root collar diameter, and 2-0 nursery stock was shown 12.4㎝ stem height, 37㎜ root collar diameter, and 2-1 nursery stock was shown 16.8㎝ stem height, 54㎜ root collar diameter, and 2-2 nursery stock was shown 23.4㎝ stem height, 78㎜ root collar diameter by the growth survey of planting stock age of momi-fir. 3. Momi-fir was grown moderately until 10 years, after 10 years grown rapidly. When the heights of each species reached to 55 years hinoki-cypress was 15.06m., Japanes ceder was 7.2m and momi-fir was 17.2m and after 55 years momi-fir was particularly shown superior tendency of height growth comparing to the other species. 4. The volume increment of momi-fir was grown slowly until 25 years, after 25 years grown rapidly, and when the volume increments of each species reached to 35 years hinoki-cypress was 0.0590㎡, Japanese-ceder was 0.0902㎡ and momi-fir was 0.1039㎡. 5. The height growth and volume increment of momi-fir was superior than Jadanese-ceder and hinoki-cypress, and momi-fir was stronger than other species in cold weather. Climatic conditions of this experimental area were as follows; Mean air temperature 13.33∼15.05℃, mean humidity 72.17∼79.42% and mean precipitation for 12 years(1967∼1978) 900.6∼2006.2㎜. Soil classes were loam and clayish loam, soil depth was deep, soil moisture was proper and soil topography was belonged to the top. According to the above mention it was recognized to be suitable for planting the momi-fir tree on the southern area of korea and similar soil and climatic conditions of the above.

유선형 고속버스의 후방저항 감소를 위한 유선형 설계 연구

김철호(Chul-Ho Kim),이상일(Sangil Lee),박지환(Jihwan Park),김대규(Dea-Ku Kim) 한국자동차공학회 2013 한국자동차공학회 학술대회 및 전시회 Vol.2013 No.11

BF-7의 기억력 및 인지기능 향상효과

김대경(Dea Kyung Kim),이준영(Jun Young Lee),성정준(Jung Jun Sung),김의태(Eui-Tae Kim),김용식(Yong Sik Kim),권오상(Oh Sang Kwon),윤영철(Young Chul Yun),이태진(Tae Jin Lee),강용구(Yong Koo Kang),정윤희(Yoon Hee Chung),김성수(Sung Su Ki 대한해부학회 2004 Anatomy & Cell Biology Vol.37 No.6

기억력과 학습력의 개선은 두뇌의 기능적 향상 뿐 아니라, 신경의 보호차원에서도 그 의학적 가치가 크다. 스트레스에 의한 뇌기능 저하등과 같은 다양한 원인으로 인하여 기억력 감퇴가 일어날 수 있다. 또한 최근 기억력 감퇴 손상 억제 기전의 연구는 현저한 기능감소를 보이고 있는 콜린성 신경계의 기능을 보충해 주는데 초점이 맞추어져 있다. 이에 근거하여 본 연구에서는 가잠(Bombyx mori)으로부터 추출한 BF-7이 실제로 생체 내에서 감퇴된 기억력을 개선시켜줄 수 있는지를 검색하기 위하여 무스카리닉(muscarinic) 수용체의 길항제인 스코폴라민(scopolamine)을 투여하여 만든 기억력감퇴 세포와 동물모델을 사용하여 실험을 수행하였다. BF-7을 전처치하고 스코폴라민을 투여하였을 때, 세포생존율, passive avoidance test와 water maze test를 실시한 결과, BF-7이 매우 효과적으로 기억력을 개선시켜주고 있음이 나타났다. 이와 같은 결과는 이물질이 실제로 BBB (blood brain barrier)를 통과하여 뇌에서 시냅스의 콜린성 신경계의 기능을 높여주었으며, 두뇌기능 개선효과에 중요한 역할을 한다는 것을 시사한다. 또한 인지기능장애 정도를 평가할 수 있는 MMSE-K 임상검사법을 시행한 결과, BF-7을 섭취한 후, 획기적인 인지기능의 개선과 향상효과가 나타났다. 이는 BF-7이 인지기능을 개선해 줄 수 있는 안전하고 효과적인 후보물질로 개발할 만한 충분한 가치를 제공하여 주는 것이라고 사료된다. Various factors such as senescence, stress, neurodegenerative diseases including Alzheimer’s disease (AD) contribute to the impairments of organs, especially brain. Also, they should be negative factors on normal brain function, like as memory and cognition. In this study, the neuroprotective role of BF-7, extracted from Bombyx mori, was examined agaist scopolamine-induced neurotoxicity in SK-N-SH cells. In order to know if the BF-7 has positive role on the cognition and memory, we examined using SD rat model and human. Scopolamine-induced memory impairments were observed, as measured by the passive avoidance and water maze tests, but treatment with BF-7 significantly improved memory and cognitive function. Moreover, the memory index and memory preservation of clinical experiments using MMSE-K tests were significantly improved memory and cognitive function. This results strongly represent that the BF-7 play effectively positive role in the improvement of brain function including learning and memory. Taken together, our results suggested that the BF-7 should be useful for developing strategies protecting nervous system and improving brain function.

자기부상열차용 선형유도전동기 정특성 시험방법에 대한 연구

김정철(Kim Jung-Chul),김봉철(Kim Bong-Chul),김대광(Kim Dea-Kwang),박영호(Park Yeong-Ho),김철호(Kim Chul-Ho) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

The recent trains are almost being operated by the mechanical propulsion force to drive the gear and wheel with the traction motor. However Magnetic Levitation Vehicle is differently operated. Magnetic Levitation Vehicle is applied with Linear Induction Motor(LIM) that has many advantage like to high capability of going up to slope, low noise, easy to control of speed. So domestic and many advanced countries are interested in Magnetic Levitation Vehicle and they have been studying about it continuously. Thus this paper is studied the LIM test method of static states and guess the optimum driving point by characteristic of static states for LIM. The test items are measurement of thrust force by changed air gap, measurement of thrust force and normal force by changed slip frequency etc.

고속전철용 견인전동기 소음개선

김정철(Kim Jung-Chul),김대광(Kim Dea-Kwang),김봉철(Kim Bong-Chul),박영호(Park Yeong-Ho),최종묵(Choi Jong-Mook) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-

The traction motor for High Speed Train is being required reliability and stability for high-speed operation. And also required low noise level, high performance, compact size owing to the space and weight limitation for attaching to train, etc. As a result of requiring the low noise level and high power capacity, it is adopted forced-air-ventilation insead of self-ventilation that is generally used on electric multiple unit. Traction motor is cooled by cooling air through the air-ventilation hole. When the traction motor is operated with forced-air-ventilation, there is some abnormal noise in the specific RPM. This paper is dealing with the method to reduce the resonance phenomena by adopting the rotor blade.

지구성 운동 유발 전 처치에 따른 심장보호 효과 (iNOS knock-out mice 활용)

김철현 ( Chul Hyun Kim ),엄현섭 ( Hyun Sub Um ),이영익 ( Young Ik Lee ),김윤만 ( Yoon Man Kim ),조인호 ( In Ho Cho ),김명기 ( Myung Ki Kim ),이규성 ( Kyu Sung Lee ),양대승 ( Dea Seung Yang ),오윤선 ( Yoon Sun Oh ),오유성 ( Yoo Sun 한국운동영양학회 2005 Physical Activity and Nutrition (Phys Act Nutr) Vol.9 No.1

The goal of this study was to explore the role of inducible NOS (iNOS) and the delayed protection of exercise preconditioning from the relative myocardial ischemia reperfusion injury. Mice were randomly placed in one of five testing groups: wild-type mice group (n = 15), high-intensity wild-type mice acute exercised group (n = 6). low-intensity wild-type mice acute exercised group (n = 5), L-NAME + wild-type mice acute exercised group (11 = 5), and homozygous (-/-) iNOS gene knock-out mice acute exercised group (n = 5). All acute exercised groups ran on the treadmill (0% grade) at 65 m,`min as a high-intensity exercise and at 27-30 m/min as a low-intensity exercise. The results showed that all acute exercise significantly reduced magnitude of a myocardial infarction in biphasic manner. In accordance with these data, NFKB and HSP-70 protein expression was increased at 24 after exercise-induced preconditioning (PC) in both low-intensity wild-type mice acute exercised group and homozygous (-/-) iNOS gene knock-out mice acute exercised group compared with wild-type mice group. In contrast, neither endothelial nitric oxide synthase (eNOS) nor inducible nitric oxide synthase (iNOS) expression changed at both wild-type mice group and low-intensity wild-type mice acute exercised group. In conclusion, The strong evidence of this study indicates that HSP-70 is particulary cytoprotectiye against protein-damaging stress such as I-R. Also, this study demonstrate that the late phase of exercise-induced PC is not associated with up-regulation of eNOS and iNOS but infarct-sparing effect and mild up-regulation of NFKB and HSP-70 at the late phase of exercise-induced PC in wild-type mice and iNOS gene knock-out mice. Thus, this study identifies a specific protein that mediates late PC in vitro.

Evaluation for Efficacies of Commercial Sanitizers and Disinfectants against Bacillus cereus Strains

Il Jin Kim,Ji-Hyoung Ha,Yong-Su Kim,Hyung-Il Kim,Hyun-Chul Choi,Dea-Hoon Jeon,Young-Ja Lee,Ae Jung Kim,Dong-Ho Bae,Keun-Sung Kim,Chan Lee,Sang-Do Ha 한국식품과학회 2009 Food Science and Biotechnology Vol.18 No.2

Bactericidal efficacies of various sanitizers and disinfectants against 10 Bacillus cereus strains isolated from Korean foods and 8 standard B. cereus strains were investigated. The sanitizing capabilities of ethanol, iodine, chloride, quaternary ammonium, hydrogen peroxide, and peroxide acetic acid were investigated using the EN 1276 method based on quantitative suspension testing. The resistance against sanitizers and disinfectants was higher for wild-type than standard strains, and the bactericidal activities decreased in dirty conditions. Ethanol, chlorine, and iodine at the maximum level allowed under Korean food sanitation laws showed a great effectiveness against B. cereus. Hydrogen peroxide at 1,100 ppm showed the lowest bactericidal activity against B. cereus. These results indicate that the legally allowed maximum concentrations of sanitizers and disinfectants in Korea do not reduce all B. cereus strains by at least 5 log₁? CFU/㎖.

Silicon oxide etching studies in inductively coupled fluorocarbon plasmas

Won-Seok Chang,Deuk-Chul Kwon,Mi-Young Song,Dea-Chul Kim,Jong-Sik Kim,Young-Woo Kim,Jung-Sik Yoon,Dong-Hun Yu,Yeong-Geun Yook,Yeon-Ho Im 한국진공학회 2017 한국진공학회 학술발표회초록집 Vol.2017 No.2

LNG플랜트 건전성 확보를 위한 NDE 신뢰성 Matrix 연구

김웅지(Woong-Ji Kim),최송천(Sung-Chun Choi),유철희(Chul-Hee Yu),송성진(Sung-Jin Song),김훈희(Hun-Hee Kim),김대광(Dea-Kwang Kim) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.6

Liquefied natural gas has the unique distinction of being the only flammable or hazardous material. Inspection effectiveness may be introduced into the probability of failure calculation by using Bayesian analysis or more directly by modifying the model for the independent variables, the distribution function and parameters, such as mean and coefficient of variation, changed based on the NDE method and coverage used during an inspection. Available failure data from the LNG industry are often statistically unreliable. Therefore, we need to improve more accurate information data. NDE reliability matrix is to apply optimization method of the NDE method. Reliability matrix is composed with combinations of environment reliability and inspection reliability. Environment parameters consist of inspector qualification and experience, test condition and inspection reliability parameters are composed of the inspection method and process method, such as UT, ET, RT and s/n ratio, signal processing method, etc. Finally, this paper purposes that the Reliability matrix is a powerful tool for risk assessment of not only the LNG industry but also in other industry.