쇄석을 Antistripping Agent 전처리하는 방법이 아스팔트 도로포장의 성능에 미치는 효과

강미영,조명찬 ( Mi Young Kang,Myung Chan Jo ) 한국화학공학회 1996 화학공학의이론과응용 Vol.2 No.1

CO<SUB>2</SUB>와 탄화수소화합물에 대한 상평형 연구

류정호(Jung-Ho Ryu),조명찬(Myung-Chan Jo) 한국가스학회 1998 한국가스학회 학술대회논문집 Vol.1998 No.9

급성 심근경색증 환자의 예후인자로서 내원 시 혈당의 유용성

승기배 ( Ki Bae Seung ),조명찬 ( Myeong Chan Cho ),박승정 ( Seung Jung Park ),김은정 ( Eun Jung Kim ),박오장 ( Oh Jang Park ),정명호 ( Myung Ho Jeong ),안영근 ( Young Keun Ahn ),김주한 ( Ju Han Kim ),김영조 ( Young Jo Kim ),채성철 대한내과학회 2010 대한내과학회지 Vol.79 No.1

Background/Aims: It has been suggested that admission hyperglycemia is associated with poor clinical outcomes in patients with acute myocardial infarction (AMI). The aim of this study was to assess the relationship between admission hyperglycemia and short-long term prognosis in patients with AMI. Methods: A total of 6,030 AMI patients without a previous history of diabetes were enrolled between Nov. 2005 and Jan. 2008. The patients were divided into three groups according to the levels of admission glucose levels: group I (<140 mg/dL, n=3,307), group II (140~199 mg/dL, n=1,946), and group III (≥200 mg/dL, n=777). In-hospital and one-year mortality were compared among three the groups. Results: The mean age was 64.3±13.3, 65.9±12.7, and 67.7±13.0 years in group I, II and III, respectively. The proportion of female gender (23.9%, 29.5%, 35.0%; p<0.001), Killip class III-IV (8.9%, 12.3%, 28.3%; p<0.001), ST-segment elevation myocardial infarction (54.6%, 71.5%, 71.7%; p<0.001), and in-hospital mortality (3.5%, 7.5%, 19.7%; p<0.001) increased with higher tertiles of elevated values of initial serum glucose. Hazard ratio (HR) for mortality rate were significantly increased in group II [HR=1.19, 95% confidential interval (Cl) 1.02~1.40, p=0.032], and in group III [HR=1.91, 95% Cl 1.59~2.30, p=0.001], compared with group I. And also significant differences were existed between group II and group III [HR =1.55, 95% Cl 1.27~1.88, p=0.001]. Conclusions: Admission glucose in patients with AMI provides incremental prognostic value, and significantly correlates with in-hospital and one-year mortalities.

폭발,연소 에너지의 개발 방향에 관한 연구

신창용 ( Chang Yong Shin ),안명석 ( Myung Seog Ahn ),조명찬 ( Myung Chan Jo ) 대한화약발파공학회 2009 화약발파 Vol.27 No.2

물리학적 측면에서 에너지의 개념은 일하는 능력으로 정의된다. 기존의 석탄·석유등 화석연료를 대체하기 위해 1980년 이후부터 천연가스·원자력 등의 사용이 증가하였으나 환경오염문제로 태양열·풍력·조력·지열 등 대체에너지로의 전환을 촉진하고 있다. 그러나 에너지 이용효율 측면에서는 원자력 에너지와 화약·가스 등 화학에너지와는 비교가 되지 않는다. 본 논문에서는 환경(대체)에너지의 한계점을 뛰어 넘을 수 있는 방안을 연구하기 위하여 그린에너지의 현황을 조사하였으며, 고효율 에너지원에 대한 청정화와 응용 및 개발방향에 대해 검토, 연구 하였다. In view of physics, energy is defined as the ability to work. The use of natural gas and nuclear power have been increased since 1980s to replace fossil fuels such as coal and petroleum. Recently, solar energy, wind power, tidal power, and geotherrnal energy have been considered as promising alternative energy sources to overcome environmental pollution. However, their energy efficiencies are much lower than those of chemical energies such as nuclear power, explosive, and petroleum gas. In this study, the present situation of the green energy was reviewed to seek out the way to overcome the limit of the environmental (alternative) energy. Also, purification, application and development trend of the highly efficient alternative energy sources were investigated.

반류수 처리를 위한 완속교반/침전 그물망 압착식 섬유여과장치 개발

장정국 ( Jeong Gook Jang ),이승헌 ( Seung Heon Lee ),박종태 ( Jong Tae Park ),조명찬 ( Myung Chan Jo ),김미란 ( Mi Ran Kim ),김정숙 ( Jeong Sook Kim ) 한국수처리학회 2014 한국수처리학회지 Vol.22 No.2

This study was carried out to develop the combined pilot plant slow mixing/ sedimentation and Net3FM(Net Fit Fiber Filter Module) system for reject water treatment from the side-stream of wastewater treatment plant. The sources of reject water are centrifugal thickening supernatant and dehydration leachate. The SS and T-P concentration ranges of supernatant were 100.0~6,820.0 mg/L and 19.2~48.7 mg/L, respectively. PACl(17% liquid) was used as coagulant, and the optimal coagulant dosage was 3 : 1 as Al/P molar ratio in this experiment. The SS concentration of reject water was reduced from 440 mg/L to 133.3 mg/L in slow mixing/sedimentation system. And also, the removal efficiency of T-P was increased due to the SS removal by slow mixing/ sedimentation in combined system. In coagulant injection by in-line mixer, SS and T-P concentrations of final effluent in this system were 5~10 and 3.0~3.4 mg/L. The removal efficiencies of SS and T-P were highly increased to 98.9% and 92.7%, respectively. These results was obtained due to the combined system which is consisted by rapid coagulation, cyclone sedimentation and fiber filtration. Therefore, the combined system(slow mixing/sedimentation Net3FM system) could be evaluated that the removal efficiency of pollutants in reject water and the utilization potential as reclaimed water technology were very high.

초저이온 농도범위에서 혼합층 이온교환능과 온도의 영향 - 2. 온도의 영향 -

윤태경(Tae Kyung Yoon),노병일(Byeong Il Noh),이창원(Chang Won Lee),문병현(Byung Hyun Moon),이강춘(Gang Choon Lee),조명찬(Myung Chan Jo) 한국공업화학회 1999 공업화학 Vol.10 No.2

N/A N/A

인공 및 천연 CaCO₃의 염료흡착 특성

조명찬 東西大學校 2000 동서논문집 Vol.6 No.-

원주의 가공기술을 개발하기 위한 초기 연구로써 진주 층 및 삽입 핵(CaCO3)을 사용하여 염료의 흡착 특성을 조사해 보았다. 진주 염색에 사용되는 것으로 알려져 있는 Rhodamine 6G, Rhodamine B, Methylene Blue를 염료로 선택하여 물, 메탄올, 에탄올, 아세톤 등의 용매를 사용하여 용해시킨 결과 염료용액 제조시 염료의 용해도로 인한 문제는 없는 것으로 판단되었다. 진주 층과 삽입 핵(CaCO3)을 60 micron크기로 파쇄한 후 Porosimeter를 사용하여 기공크기 면적과 내부표면적을 측정해 보았다. 측정 결과 기공크기, 기공체적, 내부표면적은 진주 층의 경우 대략 100 Å, 0.035 cm3/g, 1 m2/g, 삽입 핵은 대략 200 Å, 0.0116 cm3/g, 2m2/g 정도인 것으로 나타났다. Rhodamine 6G를 염료로 사용하여 진주 층과 삽입 핵에의 회분식 흡착 실험 결과 대략 20시간과 30시간 후에 각각 평형에 도달하는 것으로 나타났다. 평형 흡착 능의 경우 삽입핵에의 흡착 량은 진주 층에의 흡착 량의 약 20%에 해당되는 것으로 나타나 진주 핵에도 염료가 일부 흡착된다는 사실을 확인하였다. 탈착실험 결과 탈착률은 대략 13% 정도로 동일하나 삽입 핵의 탈착 평형 시간은 대략 10시간 정도로 진주 층의 50시간에 비해 5배 빠른 것으로 나타났다. This study represents characteristics of dye adsorption onto pearl and pearl nucleus (CaCO3). Three basic dyes such as Rhodamine 6G, Rhodimine B, and Methylene Blue were selected as model compounds for adsorption experiments because they were known to be used for processing pearls. Solubility of the dyes were investigated with various solvents such as distilled water, methanol, ethanol, and acetone and were found to be out of the range of precipitation. Pearl and pearl nucleus were reduced to powder of 60 ㎛ size and the pore characteristics of the powders were investigated using porosimeter. The pore size, pore volume, and surface area were found to be approximately 100 Å, 0.035 cm3/g, 1 m2/g for pearl and 200 Å, 0.0116 cm3/g, 2m2/g for pearl nucleus. From the batch adsorption experiment using Rhodamine 6G, it was found that equilibrium reached after 20 hours for pearl and 30 hours for pearl nucleus, respectively. Adsorption loading for pearl was 5 times larger than that for pearl nucleus. Desorption experiment showed that desorption percent was 13% for both adsorbents. However, time for desorption equilibrium for pearl nucleus was 10 hours and was 5 times shorter than that for pearl.

피혁폐수의 수질오염 현상에 관한 고찰

조명찬,노병일,신춘환 동서대학교부설연구소 1997 연구소 논문집 Vol.2 No.-

피혁의 최종처리공정 중 코딩공정은 피혁제품의 품질을 결정하는 중요한 기술로 자리잡고 있다. 피혁 코팅에 사용되는 수지들은 분산매의 종류에 따라 유성 Polyurethane(PU) 계열 및 수성 PU계열로 크게 구별되며 근래에 와서는 작업환경의 개선 및 환경오염 방지 측면에서 수용성 PU의 사용이 보편화 되면서 이들의 수질오염에 미치는 영향을 제시할 필요성이 대두되었다. 따라서 본 실험에서는 수용성 PU가 수계에 유입되었을 경우 COFD, BOD, SS의 상승효과를 측정함으로써 기초자료로 활용하고자 하며 특히 수용성 PU는 polyol 및 diisocyanate의 중 부가반응에 의해 생성되는 고분자 물질로서 수중에서는 분자 Chain이 절단되는 aging effect현상이 현저할 것으로 예상하여 수용성 PU가 유입된 수계의 aging effect와 BOD 및 COD와의 상관성을 도출하여 방류수 처리의 기초자료로 제공하고자 한다.

DC 마그네트론 스퍼터링에 의한 알루미늄 박막의 증착과 그 특성

정귀상,조명찬 東西大學校 1996 동서논문집 Vol.2 No.1

This paper describes the physical, electrical and optical characteristics of Aluminum(AI) thin films deposited on corning glass substrate by DC magnetron sputtering. The AL thin films were investigated as variations of the input power, pressure and deposition time. The deposition rate was increased linearly as the input power increased. When Ar gas pressure was increased, the deposition rate was reduced. The maximum of deposition rate efficiency was obtained at 3 mtorr. The columnar growth and stable grain growth of AL thin films were observed through SEM on condition that the input power was increased and Ar gas pressure was decreased. The crystal qualities of AL thin films were also observed by XRD. In the XRD patterns, (111) oriented direction was only appeared at 38.5℃ The intensity of XRD peak was increased with increasing input power but decreased with increasing Ar gas pressure. The resistivity and Sheet resistivity were 4.85μΩ.cm and 0.052Ω/□, respectively, under input power(9W/㎠), pressure(7mtorr) and deposition time(10min). Depending on the input power, reflectance ranged from 84% to 94%. However, Ar gas pressure don't have influence on the reflectance. The maximum reflectance of the Al thin films was obtained at input power, 3W/㎠ and pressure, 3mtorr.

아스팔트 작용기들의 실리카 표면 흡착에 관한 연구

조명찬,김수곤,박승재,박성룡 한국공업화학회 2002 응용화학 Vol.6 No.1

The adsorption of asphalt functionalities on to silica surface was investigated. The silica surface was pretreated by adsorbing hexadecyltrimethyl ammonium chloride. The model asphalt functionalities selected in this study were benzoic acid, phenol, quinoline, benzophenone, and benzylbenzoate. The adsorption affinity of the functionalities on to silica surface was sequenced as phenol > benzoic acid > quinoline > benzophenone > benzylbenzoate when cyclohexane was used as the solvent. Adsorption amount of phenol and benzoic acid decreased about 5 times in aqueous solution. The precoated silica enhanced the adsorption of phenol and benzoic acid. From the results, it was found that adsorption of the acidic components could be enhanced by modifying the silica surface with cationic poly amine surfactant.